// Copyright 2018-2025 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package server

import (
	"bufio"
	"context"
	"encoding/base64"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"math"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"sync"
	"sync/atomic"
	"testing"
	"time"

	"github.com/nats-io/jwt/v2"
	"github.com/nats-io/nats.go"
	"github.com/nats-io/nkeys"
)

var (
	// This matches ./configs/nkeys_jwts/test.seed
	oSeed = []byte("SOAFYNORQLQFJYBYNUGC5D7SH2MXMUX5BFEWWGHN3EK4VGG5TPT5DZP7QU")
	// This matches ./configs/nkeys/op.jwt
	ojwt = "eyJ0eXAiOiJqd3QiLCJhbGciOiJlZDI1NTE5In0.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.hyfz6E39BMUh0GLzovFfk3wT4OfualftjdJ_eYkLfPvu5tZubYQ_Pn9oFYGCV_6yKy3KMGhWGUCyCdHaPhalBw"
	oKp  nkeys.KeyPair
)

func init() {
	var err error
	oKp, err = nkeys.FromSeed(oSeed)
	if err != nil {
		panic(fmt.Sprintf("Parsing oSeed failed with: %v", err))
	}
}

func chanRecv(t *testing.T, recvChan <-chan struct{}, limit time.Duration) {
	t.Helper()
	select {
	case <-recvChan:
	case <-time.After(limit):
		t.Fatal("Should have received from channel")
	}
}

func opTrustBasicSetup() *Server {
	kp, _ := nkeys.FromSeed(oSeed)
	pub, _ := kp.PublicKey()
	opts := defaultServerOptions
	opts.TrustedKeys = []string{pub}
	s, c, _, _ := rawSetup(opts)
	c.close()
	return s
}

func buildMemAccResolver(s *Server) {
	mr := &MemAccResolver{}
	s.SetAccountResolver(mr)
}

func addAccountToMemResolver(s *Server, pub, jwtclaim string) {
	s.AccountResolver().Store(pub, jwtclaim)
}

func createClient(t *testing.T, s *Server, akp nkeys.KeyPair) (*testAsyncClient, *bufio.Reader, string) {
	return createClientWithIssuer(t, s, akp, "")
}

func createClientWithIssuer(t *testing.T, s *Server, akp nkeys.KeyPair, optIssuerAccount string) (*testAsyncClient, *bufio.Reader, string) {
	t.Helper()
	nkp, _ := nkeys.CreateUser()
	pub, _ := nkp.PublicKey()
	nuc := jwt.NewUserClaims(pub)
	if optIssuerAccount != "" {
		nuc.IssuerAccount = optIssuerAccount
	}
	ujwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}
	c, cr, l := newClientForServer(s)

	// Sign Nonce
	var info nonceInfo
	json.Unmarshal([]byte(l[5:]), &info)
	sigraw, _ := nkp.Sign([]byte(info.Nonce))
	sig := base64.RawURLEncoding.EncodeToString(sigraw)

	cs := fmt.Sprintf("CONNECT {\"jwt\":%q,\"sig\":\"%s\"}\r\nPING\r\n", ujwt, sig)
	return c, cr, cs
}

func setupJWTTestWithClaims(t *testing.T, nac *jwt.AccountClaims, nuc *jwt.UserClaims, expected string) (*Server, nkeys.KeyPair, *testAsyncClient, *bufio.Reader) {
	t.Helper()

	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	if nac == nil {
		nac = jwt.NewAccountClaims(apub)
	} else {
		nac.Subject = apub
	}
	ajwt, err := nac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	nkp, _ := nkeys.CreateUser()
	pub, _ := nkp.PublicKey()
	if nuc == nil {
		nuc = jwt.NewUserClaims(pub)
	} else {
		nuc.Subject = pub
	}
	jwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}

	s := opTrustBasicSetup()
	buildMemAccResolver(s)
	addAccountToMemResolver(s, apub, ajwt)

	c, cr, l := newClientForServer(s)

	// Sign Nonce
	var info nonceInfo
	json.Unmarshal([]byte(l[5:]), &info)
	sigraw, _ := nkp.Sign([]byte(info.Nonce))
	sig := base64.RawURLEncoding.EncodeToString(sigraw)

	// PING needed to flush the +OK/-ERR to us.
	cs := fmt.Sprintf("CONNECT {\"jwt\":%q,\"sig\":\"%s\",\"verbose\":true,\"pedantic\":true}\r\nPING\r\n", jwt, sig)
	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		c.parse([]byte(cs))
		wg.Done()
	}()
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, expected) {
		t.Fatalf("Expected %q, got %q", expected, l)
	}
	wg.Wait()

	return s, akp, c, cr
}

func setupJWTTestWitAccountClaims(t *testing.T, nac *jwt.AccountClaims, expected string) (*Server, nkeys.KeyPair, *testAsyncClient, *bufio.Reader) {
	t.Helper()
	return setupJWTTestWithClaims(t, nac, nil, expected)
}

// This is used in test to create account claims and pass it
// to setupJWTTestWitAccountClaims.
func newJWTTestAccountClaims() *jwt.AccountClaims {
	// We call NewAccountClaims() because it sets some defaults.
	// However, this call needs a subject, but the real subject will
	// be set in setupJWTTestWitAccountClaims(). Use some temporary one
	// here.
	return jwt.NewAccountClaims("temp")
}

func setupJWTTestWithUserClaims(t *testing.T, nuc *jwt.UserClaims, expected string) (*Server, *testAsyncClient, *bufio.Reader) {
	t.Helper()
	s, _, c, cr := setupJWTTestWithClaims(t, nil, nuc, expected)
	return s, c, cr
}

// This is used in test to create user claims and pass it
// to setupJWTTestWithUserClaims.
func newJWTTestUserClaims() *jwt.UserClaims {
	// As of now, tests could simply do &jwt.UserClaims{}, but in
	// case some defaults are later added, we call NewUserClaims().
	// However, this call needs a subject, but the real subject will
	// be set in setupJWTTestWithUserClaims(). Use some temporary one
	// here.
	return jwt.NewUserClaims("temp")
}

func TestJWTUser(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()

	// Check to make sure we would have an authTimer
	if !s.info.AuthRequired {
		t.Fatalf("Expect the server to require auth")
	}

	c, cr, _ := newClientForServer(s)
	defer c.close()

	// Don't send jwt field, should fail.
	c.parseAsync("CONNECT {\"verbose\":true,\"pedantic\":true}\r\nPING\r\n")
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}

	okp, _ := nkeys.FromSeed(oSeed)

	// Create an account that will be expired.
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	c, cr, cs := createClient(t, s, akp)
	defer c.close()

	// PING needed to flush the +OK/-ERR to us.
	// This should fail too since no account resolver is defined.
	c.parseAsync(cs)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}

	// Ok now let's walk through and make sure all is good.
	// We will set the account resolver by hand to a memory resolver.
	buildMemAccResolver(s)
	addAccountToMemResolver(s, apub, ajwt)

	c, cr, cs = createClient(t, s, akp)
	defer c.close()

	c.parseAsync(cs)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected a PONG, got %q", l)
	}
}

func TestJWTUserBadTrusted(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()

	// Check to make sure we would have an authTimer
	if !s.info.AuthRequired {
		t.Fatalf("Expect the server to require auth")
	}
	// Now place bad trusted key
	s.mu.Lock()
	s.trustedKeys = []string{"bad"}
	s.mu.Unlock()

	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create an account that will be expired.
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, apub, ajwt)

	c, cr, cs := createClient(t, s, akp)
	defer c.close()
	c.parseAsync(cs)
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
}

// Test that if a user tries to connect with an expired user JWT we do the right thing.
func TestJWTUserExpired(t *testing.T) {
	nuc := newJWTTestUserClaims()
	nuc.IssuedAt = time.Now().Add(-10 * time.Second).Unix()
	nuc.Expires = time.Now().Add(-2 * time.Second).Unix()
	s, c, _ := setupJWTTestWithUserClaims(t, nuc, "-ERR ")
	c.close()
	s.Shutdown()
}

func TestJWTUserExpiresAfterConnect(t *testing.T) {
	nuc := newJWTTestUserClaims()
	nuc.IssuedAt = time.Now().Unix()
	nuc.Expires = time.Now().Add(time.Second).Unix()
	s, c, cr := setupJWTTestWithUserClaims(t, nuc, "+OK")
	defer s.Shutdown()
	defer c.close()
	l, err := cr.ReadString('\n')
	if err != nil {
		t.Fatalf("Received %v", err)
	}
	if !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected a PONG")
	}

	// Now we should expire after 1 second or so.
	time.Sleep(1250 * time.Millisecond)

	l, err = cr.ReadString('\n')
	if err != nil {
		t.Fatalf("Received %v", err)
	}
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
	if !strings.Contains(l, "Expired") {
		t.Fatalf("Expected 'Expired' to be in the error")
	}
}

func TestJWTUserPermissionClaims(t *testing.T) {
	nuc := newJWTTestUserClaims()
	nuc.Permissions.Pub.Allow.Add("foo")
	nuc.Permissions.Pub.Allow.Add("bar")
	nuc.Permissions.Pub.Deny.Add("baz")
	nuc.Permissions.Sub.Allow.Add("foo")
	nuc.Permissions.Sub.Allow.Add("bar")
	nuc.Permissions.Sub.Deny.Add("baz")

	s, c, _ := setupJWTTestWithUserClaims(t, nuc, "+OK")
	defer s.Shutdown()
	defer c.close()

	// Now check client to make sure permissions transferred.
	c.mu.Lock()
	defer c.mu.Unlock()

	if c.perms == nil {
		t.Fatalf("Expected client permissions to be set")
	}

	if lpa := c.perms.pub.allow.Count(); lpa != 2 {
		t.Fatalf("Expected 2 publish allow subjects, got %d", lpa)
	}
	if lpd := c.perms.pub.deny.Count(); lpd != 1 {
		t.Fatalf("Expected 1 publish deny subjects, got %d", lpd)
	}
	if lsa := c.perms.sub.allow.Count(); lsa != 2 {
		t.Fatalf("Expected 2 subscribe allow subjects, got %d", lsa)
	}
	if lsd := c.perms.sub.deny.Count(); lsd != 1 {
		t.Fatalf("Expected 1 subscribe deny subjects, got %d", lsd)
	}
}

func TestJWTAccountDefaultPermissionsUpdateRefreshesClients(t *testing.T) {
	nac := newJWTTestAccountClaims()
	nac.DefaultPermissions.Pub.Allow.Add("foo")
	nac.DefaultPermissions.Sub.Allow.Add("foo")

	s, _, c, cr := setupJWTTestWitAccountClaims(t, nac, "+OK")
	defer s.Shutdown()
	defer c.close()

	if l, _ := cr.ReadString('\n'); !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected PONG, got %q", l)
	}

	c.mu.Lock()
	acc := c.acc
	require_True(t, c.pubAllowedFullCheck("foo", true, true))
	require_True(t, c.canSubscribe("foo"))
	c.mu.Unlock()
	require_NotNil(t, acc)

	c.parseAsync("SUB foo 1\r\nPING\r\n")
	if l, _ := cr.ReadString('\n'); !strings.HasPrefix(l, "+OK") {
		t.Fatalf("Expected subscription to be accepted, got %q", l)
	}
	if l, _ := cr.ReadString('\n'); !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected PONG, got %q", l)
	}

	nac = jwt.NewAccountClaims(acc.Name)
	nac.DefaultPermissions.Pub.Allow.Add("bar")
	nac.DefaultPermissions.Sub.Allow.Add("bar")
	ajwt, err := nac.Encode(oKp)
	require_NoError(t, err)

	addAccountToMemResolver(s, acc.Name, ajwt)
	s.UpdateAccountClaims(acc, nac)

	c.mu.Lock()
	require_False(t, c.pubAllowedFullCheck("foo", true, true))
	require_True(t, c.pubAllowedFullCheck("bar", true, true))
	require_False(t, c.canSubscribe("foo"))
	require_True(t, c.canSubscribe("bar"))
	_, ok := c.subs["1"]
	c.mu.Unlock()
	require_False(t, ok)

	line, _ := cr.ReadString('\n')
	require_Contains(t, line, `Permissions Violation for Subscription to "foo"`)

	c.parseAsync("PUB foo 0\r\n\r\n")
	line, _ = cr.ReadString('\n')
	require_Contains(t, line, `Permissions Violation for Publish to "foo"`)
}

func TestJWTAccountDefaultPermissionsUpdateKeepsExplicitUserPermissions(t *testing.T) {
	nac := newJWTTestAccountClaims()
	nac.DefaultPermissions.Pub.Allow.Add("foo")
	nac.DefaultPermissions.Sub.Allow.Add("foo")

	nuc := newJWTTestUserClaims()
	nuc.Permissions.Pub.Allow.Add("baz")
	nuc.Permissions.Sub.Allow.Add("baz")

	s, _, c, cr := setupJWTTestWithClaims(t, nac, nuc, "+OK")
	defer s.Shutdown()
	defer c.close()

	if l, _ := cr.ReadString('\n'); !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected PONG, got %q", l)
	}

	c.mu.Lock()
	acc := c.acc
	require_True(t, c.pubAllowedFullCheck("baz", true, true))
	require_False(t, c.pubAllowedFullCheck("foo", true, true))
	require_True(t, c.canSubscribe("baz"))
	require_False(t, c.canSubscribe("foo"))
	c.mu.Unlock()
	require_NotNil(t, acc)

	nac = jwt.NewAccountClaims(acc.Name)
	nac.DefaultPermissions.Pub.Allow.Add("bar")
	nac.DefaultPermissions.Sub.Allow.Add("bar")
	ajwt, err := nac.Encode(oKp)
	require_NoError(t, err)

	addAccountToMemResolver(s, acc.Name, ajwt)
	s.UpdateAccountClaims(acc, nac)

	c.mu.Lock()
	require_True(t, c.pubAllowedFullCheck("baz", true, true))
	require_False(t, c.pubAllowedFullCheck("bar", true, true))
	require_True(t, c.canSubscribe("baz"))
	require_False(t, c.canSubscribe("bar"))
	c.mu.Unlock()
}

func TestJWTUserResponsePermissionClaims(t *testing.T) {
	nuc := newJWTTestUserClaims()
	nuc.Permissions.Resp = &jwt.ResponsePermission{
		MaxMsgs: 22,
		Expires: 100 * time.Millisecond,
	}
	s, c, _ := setupJWTTestWithUserClaims(t, nuc, "+OK")
	defer s.Shutdown()
	defer c.close()

	// Now check client to make sure permissions transferred.
	c.mu.Lock()
	defer c.mu.Unlock()

	if c.perms == nil {
		t.Fatalf("Expected client permissions to be set")
	}
	if c.perms.pub.allow == nil {
		t.Fatalf("Expected client perms for pub allow to be non-nil")
	}
	if lpa := c.perms.pub.allow.Count(); lpa != 0 {
		t.Fatalf("Expected 0 publish allow subjects, got %d", lpa)
	}
	if c.perms.resp == nil {
		t.Fatalf("Expected client perms for response permissions to be non-nil")
	}
	if c.perms.resp.MaxMsgs != nuc.Permissions.Resp.MaxMsgs {
		t.Fatalf("Expected client perms for response permissions MaxMsgs to be same as jwt: %d vs %d",
			c.perms.resp.MaxMsgs, nuc.Permissions.Resp.MaxMsgs)
	}
	if c.perms.resp.Expires != nuc.Permissions.Resp.Expires {
		t.Fatalf("Expected client perms for response permissions Expires to be same as jwt: %v vs %v",
			c.perms.resp.Expires, nuc.Permissions.Resp.Expires)
	}
}

func TestJWTUserResponsePermissionClaimsDefaultValues(t *testing.T) {
	nuc := newJWTTestUserClaims()
	nuc.Permissions.Resp = &jwt.ResponsePermission{}
	s, c, _ := setupJWTTestWithUserClaims(t, nuc, "+OK")
	defer s.Shutdown()
	defer c.close()

	// Now check client to make sure permissions transferred
	// and defaults are set.
	c.mu.Lock()
	defer c.mu.Unlock()

	if c.perms == nil {
		t.Fatalf("Expected client permissions to be set")
	}
	if c.perms.pub.allow == nil {
		t.Fatalf("Expected client perms for pub allow to be non-nil")
	}
	if lpa := c.perms.pub.allow.Count(); lpa != 0 {
		t.Fatalf("Expected 0 publish allow subjects, got %d", lpa)
	}
	if c.perms.resp == nil {
		t.Fatalf("Expected client perms for response permissions to be non-nil")
	}
	if c.perms.resp.MaxMsgs != DEFAULT_ALLOW_RESPONSE_MAX_MSGS {
		t.Fatalf("Expected client perms for response permissions MaxMsgs to be default %v, got %v",
			DEFAULT_ALLOW_RESPONSE_MAX_MSGS, c.perms.resp.MaxMsgs)
	}
	if c.perms.resp.Expires != DEFAULT_ALLOW_RESPONSE_EXPIRATION {
		t.Fatalf("Expected client perms for response permissions Expires to be default %v, got %v",
			DEFAULT_ALLOW_RESPONSE_EXPIRATION, c.perms.resp.Expires)
	}
}

func TestJWTUserResponsePermissionClaimsNegativeValues(t *testing.T) {
	nuc := newJWTTestUserClaims()
	nuc.Permissions.Resp = &jwt.ResponsePermission{
		MaxMsgs: -1,
		Expires: -1 * time.Second,
	}
	s, c, _ := setupJWTTestWithUserClaims(t, nuc, "+OK")
	defer s.Shutdown()
	defer c.close()

	// Now check client to make sure permissions transferred
	// and negative values are transferred.
	c.mu.Lock()
	defer c.mu.Unlock()

	if c.perms == nil {
		t.Fatalf("Expected client permissions to be set")
	}
	if c.perms.pub.allow == nil {
		t.Fatalf("Expected client perms for pub allow to be non-nil")
	}
	if lpa := c.perms.pub.allow.Count(); lpa != 0 {
		t.Fatalf("Expected 0 publish allow subjects, got %d", lpa)
	}
	if c.perms.resp == nil {
		t.Fatalf("Expected client perms for response permissions to be non-nil")
	}
	if c.perms.resp.MaxMsgs != -1 {
		t.Fatalf("Expected client perms for response permissions MaxMsgs to be %v, got %v",
			-1, c.perms.resp.MaxMsgs)
	}
	if c.perms.resp.Expires != -1*time.Second {
		t.Fatalf("Expected client perms for response permissions Expires to be %v, got %v",
			-1*time.Second, c.perms.resp.Expires)
	}
}

func TestJWTAccountExpired(t *testing.T) {
	nac := newJWTTestAccountClaims()
	nac.IssuedAt = time.Now().Add(-10 * time.Second).Unix()
	nac.Expires = time.Now().Add(-2 * time.Second).Unix()
	s, _, c, _ := setupJWTTestWitAccountClaims(t, nac, "-ERR ")
	defer s.Shutdown()
	defer c.close()
}

func TestJWTAccountExpiresAfterConnect(t *testing.T) {
	nac := newJWTTestAccountClaims()
	now := time.Now()
	nac.IssuedAt = now.Add(-10 * time.Second).Unix()
	nac.Expires = now.Round(time.Second).Add(time.Second).Unix()
	s, akp, c, cr := setupJWTTestWitAccountClaims(t, nac, "+OK")
	defer s.Shutdown()
	defer c.close()

	apub, _ := akp.PublicKey()
	acc, err := s.LookupAccount(apub)
	if acc == nil || err != nil {
		t.Fatalf("Expected to retrieve the account")
	}

	if l, _ := cr.ReadString('\n'); !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected PONG, got %q", l)
	}

	// Wait for the account to be expired.
	checkFor(t, 3*time.Second, 100*time.Millisecond, func() error {
		if acc.IsExpired() {
			return nil
		}
		return fmt.Errorf("Account not expired yet")
	})

	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error, got %q", l)
	}
	if !strings.Contains(l, "Expired") {
		t.Fatalf("Expected 'Expired' to be in the error")
	}

	// Now make sure that accounts that have expired return an error.
	c, cr, cs := createClient(t, s, akp)
	defer c.close()
	c.parseAsync(cs)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
}

func TestJWTAccountRenew(t *testing.T) {
	nac := newJWTTestAccountClaims()
	// Create an account that has expired.
	nac.IssuedAt = time.Now().Add(-10 * time.Second).Unix()
	nac.Expires = time.Now().Add(-2 * time.Second).Unix()
	// Expect an error
	s, akp, c, _ := setupJWTTestWitAccountClaims(t, nac, "-ERR ")
	defer s.Shutdown()
	defer c.close()

	okp, _ := nkeys.FromSeed(oSeed)
	apub, _ := akp.PublicKey()

	// Now update with new expiration
	nac.IssuedAt = time.Now().Unix()
	nac.Expires = time.Now().Add(5 * time.Second).Unix()
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	// Update the account
	addAccountToMemResolver(s, apub, ajwt)
	acc, _ := s.LookupAccount(apub)
	if acc == nil {
		t.Fatalf("Expected to retrieve the account")
	}
	s.UpdateAccountClaims(acc, nac)

	// Now make sure we can connect.
	c, cr, cs := createClient(t, s, akp)
	defer c.close()
	c.parseAsync(cs)
	if l, _ := cr.ReadString('\n'); !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected a PONG, got: %q", l)
	}
}

func TestJWTAccountRenewFromResolver(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	nac.IssuedAt = time.Now().Add(-10 * time.Second).Unix()
	nac.Expires = time.Now().Add(time.Second).Unix()
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, apub, ajwt)
	// Force it to be loaded by the server and start the expiration timer.
	acc, _ := s.LookupAccount(apub)
	if acc == nil {
		t.Fatalf("Could not retrieve account for %q", apub)
	}

	// Create a new user
	c, cr, cs := createClient(t, s, akp)
	defer c.close()
	// Wait for expiration.
	time.Sleep(1250 * time.Millisecond)

	c.parseAsync(cs)
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}

	// Now update with new expiration
	nac.IssuedAt = time.Now().Unix()
	nac.Expires = time.Now().Add(5 * time.Second).Unix()
	ajwt, err = nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	// Update the account
	addAccountToMemResolver(s, apub, ajwt)
	// Make sure the too quick update suppression does not bite us.
	acc.mu.Lock()
	acc.updated = time.Now().UTC().Add(-1 * time.Hour)
	acc.mu.Unlock()

	// Do not update the account directly. The resolver should
	// happen automatically.

	// Now make sure we can connect.
	c, cr, cs = createClient(t, s, akp)
	defer c.close()
	c.parseAsync(cs)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected a PONG, got: %q", l)
	}
}

func TestJWTAccountBasicImportExport(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)

	// Now create Exports.
	streamExport := &jwt.Export{Subject: "foo", Type: jwt.Stream}
	streamExport2 := &jwt.Export{Subject: "private", Type: jwt.Stream, TokenReq: true}
	serviceExport := &jwt.Export{Subject: "req.echo", Type: jwt.Service, TokenReq: true}
	serviceExport2 := &jwt.Export{Subject: "req.add", Type: jwt.Service, TokenReq: true}

	fooAC.Exports.Add(streamExport, streamExport2, serviceExport, serviceExport2)
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, fooPub, fooJWT)

	acc, _ := s.LookupAccount(fooPub)
	if acc == nil {
		t.Fatalf("Expected to retrieve the account")
	}

	// Check to make sure exports transferred over.
	if les := len(acc.exports.streams); les != 2 {
		t.Fatalf("Expected exports streams len of 2, got %d", les)
	}
	if les := len(acc.exports.services); les != 2 {
		t.Fatalf("Expected exports services len of 2, got %d", les)
	}
	_, ok := acc.exports.streams["foo"]
	if !ok {
		t.Fatalf("Expected to map a stream export")
	}
	se, ok := acc.exports.services["req.echo"]
	if !ok || se == nil {
		t.Fatalf("Expected to map a service export")
	}
	if !se.tokenReq {
		t.Fatalf("Expected the service export to require tokens")
	}

	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)

	streamImport := &jwt.Import{Account: fooPub, Subject: "foo", To: "import.foo", Type: jwt.Stream}
	serviceImport := &jwt.Import{Account: fooPub, Subject: "req.echo", Type: jwt.Service}
	barAC.Imports.Add(streamImport, serviceImport)
	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)

	acc, _ = s.LookupAccount(barPub)
	if acc == nil {
		t.Fatalf("Expected to retrieve the account")
	}
	if les := len(acc.imports.streams); les != 1 {
		t.Fatalf("Expected imports streams len of 1, got %d", les)
	}
	// Our service import should have failed without a token.
	if les := len(acc.imports.services); les != 0 {
		t.Fatalf("Expected imports services len of 0, got %d", les)
	}

	// Now add in a bad activation token.
	barAC = jwt.NewAccountClaims(barPub)
	serviceImport = &jwt.Import{Account: fooPub, Subject: "req.echo", Token: "not a token", Type: jwt.Service}
	barAC.Imports.Add(serviceImport)
	barJWT, err = barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)

	s.UpdateAccountClaims(acc, barAC)

	// Our service import should have failed with a bad token.
	if les := len(acc.imports.services); les != 0 {
		t.Fatalf("Expected imports services len of 0, got %d", les)
	}

	// Now make a correct one.
	barAC = jwt.NewAccountClaims(barPub)
	serviceImport = &jwt.Import{Account: fooPub, Subject: "req.echo", Type: jwt.Service}

	activation := jwt.NewActivationClaims(barPub)
	activation.ImportSubject = "req.echo"
	activation.ImportType = jwt.Service
	actJWT, err := activation.Encode(fooKP)
	if err != nil {
		t.Fatalf("Error generating activation token: %v", err)
	}
	serviceImport.Token = actJWT
	barAC.Imports.Add(serviceImport)
	barJWT, err = barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	vr := jwt.ValidationResults{}
	barAC.Validate(&vr)
	if vr.IsBlocking(true) {
		t.Fatalf("Error generating account JWT: %v", vr)
	}

	addAccountToMemResolver(s, barPub, barJWT)
	s.UpdateAccountClaims(acc, barAC)
	// Our service import should have succeeded.
	if les := len(acc.imports.services); les != 1 {
		t.Fatalf("Expected imports services len of 1, got %d", les)
	}

	// Now streams
	barAC = jwt.NewAccountClaims(barPub)
	streamImport = &jwt.Import{Account: fooPub, Subject: "private", To: "import.private", Type: jwt.Stream}

	barAC.Imports.Add(streamImport)
	barJWT, err = barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)
	s.UpdateAccountClaims(acc, barAC)
	// Our stream import should have not succeeded.
	if les := len(acc.imports.streams); les != 0 {
		t.Fatalf("Expected imports services len of 0, got %d", les)
	}

	// Now add in activation.
	barAC = jwt.NewAccountClaims(barPub)
	streamImport = &jwt.Import{Account: fooPub, Subject: "private", To: "import.private", Type: jwt.Stream}

	activation = jwt.NewActivationClaims(barPub)
	activation.ImportSubject = "private"
	activation.ImportType = jwt.Stream
	actJWT, err = activation.Encode(fooKP)
	if err != nil {
		t.Fatalf("Error generating activation token: %v", err)
	}
	streamImport.Token = actJWT
	barAC.Imports.Add(streamImport)
	barJWT, err = barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)
	s.UpdateAccountClaims(acc, barAC)
	// Our stream import should have not succeeded.
	if les := len(acc.imports.streams); les != 1 {
		t.Fatalf("Expected imports services len of 1, got %d", les)
	}
}

func TestJWTAccountExportWithResponseType(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)

	// Now create Exports.
	serviceStreamExport := &jwt.Export{Subject: "test.stream", Type: jwt.Service, ResponseType: jwt.ResponseTypeStream, TokenReq: false}
	serviceChunkExport := &jwt.Export{Subject: "test.chunk", Type: jwt.Service, ResponseType: jwt.ResponseTypeChunked, TokenReq: false}
	serviceSingletonExport := &jwt.Export{Subject: "test.single", Type: jwt.Service, ResponseType: jwt.ResponseTypeSingleton, TokenReq: true}
	serviceDefExport := &jwt.Export{Subject: "test.def", Type: jwt.Service, TokenReq: true}
	serviceOldExport := &jwt.Export{Subject: "test.old", Type: jwt.Service, TokenReq: false}

	fooAC.Exports.Add(serviceStreamExport, serviceSingletonExport, serviceChunkExport, serviceDefExport, serviceOldExport)
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, fooPub, fooJWT)

	fooAcc, _ := s.LookupAccount(fooPub)
	if fooAcc == nil {
		t.Fatalf("Expected to retrieve the account")
	}

	services := fooAcc.exports.services

	if len(services) != 5 {
		t.Fatalf("Expected 4 services")
	}

	se, ok := services["test.stream"]
	if !ok || se == nil {
		t.Fatalf("Expected to map a service export")
	}
	if se.tokenReq {
		t.Fatalf("Expected the service export to not require tokens")
	}
	if se.respType != Streamed {
		t.Fatalf("Expected the service export to respond with a stream")
	}

	se, ok = services["test.chunk"]
	if !ok || se == nil {
		t.Fatalf("Expected to map a service export")
	}
	if se.tokenReq {
		t.Fatalf("Expected the service export to not require tokens")
	}
	if se.respType != Chunked {
		t.Fatalf("Expected the service export to respond with a stream")
	}

	se, ok = services["test.def"]
	if !ok || se == nil {
		t.Fatalf("Expected to map a service export")
	}
	if !se.tokenReq {
		t.Fatalf("Expected the service export to not require tokens")
	}
	if se.respType != Singleton {
		t.Fatalf("Expected the service export to respond with a stream")
	}

	se, ok = services["test.single"]
	if !ok || se == nil {
		t.Fatalf("Expected to map a service export")
	}
	if !se.tokenReq {
		t.Fatalf("Expected the service export to not require tokens")
	}
	if se.respType != Singleton {
		t.Fatalf("Expected the service export to respond with a stream")
	}

	se, ok = services["test.old"]
	if !ok || se == nil || len(se.approved) > 0 {
		t.Fatalf("Service with a singleton response and no tokens should not be nil and have no approvals")
	}
}

func expectPong(t *testing.T, cr *bufio.Reader) {
	t.Helper()
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected a PONG, got %q", l)
	}
}

func expectMsg(t *testing.T, cr *bufio.Reader, sub, payload string) {
	t.Helper()
	l, _ := cr.ReadString('\n')
	expected := "MSG " + sub
	if !strings.HasPrefix(l, expected) {
		t.Fatalf("Expected %q, got %q", expected, l)
	}
	l, _ = cr.ReadString('\n')
	if l != payload+"\r\n" {
		t.Fatalf("Expected %q, got %q", payload, l)
	}
	expectPong(t, cr)
}

func TestJWTAccountImportExportUpdates(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)
	streamExport := &jwt.Export{Subject: "foo", Type: jwt.Stream}

	fooAC.Exports.Add(streamExport)
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)

	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)
	streamImport := &jwt.Import{Account: fooPub, Subject: "foo", To: "import", Type: jwt.Stream}

	barAC.Imports.Add(streamImport)
	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)

	// Create a client.
	c, cr, cs := createClient(t, s, barKP)
	defer c.close()

	c.parseAsync(cs)
	expectPong(t, cr)

	c.parseAsync("SUB import.foo 1\r\nPING\r\n")
	expectPong(t, cr)

	checkShadow := func(expected int) {
		t.Helper()
		c.mu.Lock()
		defer c.mu.Unlock()
		sub := c.subs["1"]
		if ls := len(sub.shadow); ls != expected {
			t.Fatalf("Expected shadows to be %d, got %d", expected, ls)
		}
	}

	// We created a SUB on foo which should create a shadow subscription.
	checkShadow(1)

	// Now update bar and remove the import which should make the shadow go away.
	barAC = jwt.NewAccountClaims(barPub)
	barJWT, _ = barAC.Encode(okp)
	addAccountToMemResolver(s, barPub, barJWT)
	acc, _ := s.LookupAccount(barPub)
	s.UpdateAccountClaims(acc, barAC)

	checkShadow(0)

	// Now add it back and make sure the shadow comes back.
	streamImport = &jwt.Import{Account: string(fooPub), Subject: "foo", To: "import", Type: jwt.Stream}
	barAC.Imports.Add(streamImport)
	barJWT, _ = barAC.Encode(okp)
	addAccountToMemResolver(s, barPub, barJWT)
	s.UpdateAccountClaims(acc, barAC)

	checkShadow(1)

	// Now change export and make sure it goes away as well. So no exports anymore.
	fooAC = jwt.NewAccountClaims(fooPub)
	fooJWT, _ = fooAC.Encode(okp)
	addAccountToMemResolver(s, fooPub, fooJWT)
	acc, _ = s.LookupAccount(fooPub)
	s.UpdateAccountClaims(acc, fooAC)
	checkShadow(0)

	// Now add it in but with permission required.
	streamExport = &jwt.Export{Subject: "foo", Type: jwt.Stream, TokenReq: true}
	fooAC.Exports.Add(streamExport)
	fooJWT, _ = fooAC.Encode(okp)
	addAccountToMemResolver(s, fooPub, fooJWT)
	s.UpdateAccountClaims(acc, fooAC)

	checkShadow(0)

	// Now put it back as normal.
	fooAC = jwt.NewAccountClaims(fooPub)
	streamExport = &jwt.Export{Subject: "foo", Type: jwt.Stream}
	fooAC.Exports.Add(streamExport)
	fooJWT, _ = fooAC.Encode(okp)
	addAccountToMemResolver(s, fooPub, fooJWT)
	s.UpdateAccountClaims(acc, fooAC)

	checkShadow(1)
}

func TestJWTAccountImportActivationExpires(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)
	streamExport := &jwt.Export{Subject: "foo", Type: jwt.Stream, TokenReq: true}
	fooAC.Exports.Add(streamExport)

	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, fooPub, fooJWT)
	acc, _ := s.LookupAccount(fooPub)
	if acc == nil {
		t.Fatalf("Expected to retrieve the account")
	}

	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)
	streamImport := &jwt.Import{Account: fooPub, Subject: "foo", To: "import.", Type: jwt.Stream}

	activation := jwt.NewActivationClaims(barPub)
	activation.ImportSubject = "foo"
	activation.ImportType = jwt.Stream
	now := time.Now()
	activation.IssuedAt = now.Add(-10 * time.Second).Unix()
	// These are second resolution. So round up before adding a second.
	activation.Expires = now.Round(time.Second).Add(time.Second).Unix()
	actJWT, err := activation.Encode(fooKP)
	if err != nil {
		t.Fatalf("Error generating activation token: %v", err)
	}
	streamImport.Token = actJWT
	barAC.Imports.Add(streamImport)
	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)
	if acc, _ := s.LookupAccount(barPub); acc == nil {
		t.Fatalf("Expected to retrieve the account")
	}

	// Create a client.
	c, cr, cs := createClient(t, s, barKP)
	defer c.close()

	c.parseAsync(cs)
	expectPong(t, cr)

	c.parseAsync("SUB import.foo 1\r\nPING\r\n")
	expectPong(t, cr)

	checkShadow := func(t *testing.T, expected int) {
		t.Helper()
		checkFor(t, 3*time.Second, 15*time.Millisecond, func() error {
			c.mu.Lock()
			defer c.mu.Unlock()
			sub := c.subs["1"]
			if ls := len(sub.shadow); ls != expected {
				return fmt.Errorf("Expected shadows to be %d, got %d", expected, ls)
			}
			return nil
		})
	}

	// We created a SUB on foo which should create a shadow subscription.
	checkShadow(t, 1)

	time.Sleep(1250 * time.Millisecond)

	// Should have expired and been removed.
	checkShadow(t, 0)
}

func TestJWTAccountLimitsSubs(t *testing.T) {
	fooAC := newJWTTestAccountClaims()
	fooAC.Limits.Subs = 10
	s, fooKP, c, _ := setupJWTTestWitAccountClaims(t, fooAC, "+OK")
	defer s.Shutdown()
	defer c.close()

	okp, _ := nkeys.FromSeed(oSeed)
	fooPub, _ := fooKP.PublicKey()

	// Create a client.
	c, cr, cs := createClient(t, s, fooKP)
	defer c.close()

	c.parseAsync(cs)
	expectPong(t, cr)

	// Check to make sure we have the limit set.
	// Account first
	fooAcc, _ := s.LookupAccount(fooPub)
	fooAcc.mu.RLock()
	if fooAcc.msubs != 10 {
		fooAcc.mu.RUnlock()
		t.Fatalf("Expected account to have msubs of 10, got %d", fooAcc.msubs)
	}
	fooAcc.mu.RUnlock()
	// Now test that the client has limits too.
	c.mu.Lock()
	if c.msubs != 10 {
		c.mu.Unlock()
		t.Fatalf("Expected client msubs to be 10, got %d", c.msubs)
	}
	c.mu.Unlock()

	// Now make sure its enforced.
	/// These should all work ok.
	for i := 0; i < 10; i++ {
		c.parseAsync(fmt.Sprintf("SUB foo %d\r\nPING\r\n", i))
		expectPong(t, cr)
	}

	// This one should fail.
	c.parseAsync("SUB foo 22\r\n")
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR") {
		t.Fatalf("Expected an ERR, got: %v", l)
	}
	if !strings.Contains(l, "maximum subscriptions exceeded") {
		t.Fatalf("Expected an ERR for max subscriptions exceeded, got: %v", l)
	}

	// Now update the claims and expect if max is lower to be disconnected.
	fooAC.Limits.Subs = 5
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)
	s.UpdateAccountClaims(fooAcc, fooAC)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR") {
		t.Fatalf("Expected an ERR, got: %v", l)
	}
	if !strings.Contains(l, "maximum subscriptions exceeded") {
		t.Fatalf("Expected an ERR for max subscriptions exceeded, got: %v", l)
	}
}

func TestJWTAccountLimitsSubsButServerOverrides(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	// override with server setting of 2.
	opts := s.getOpts()
	opts.MaxSubs = 2

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)
	fooAC.Limits.Subs = 10
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)
	fooAcc, _ := s.LookupAccount(fooPub)
	fooAcc.mu.RLock()
	if fooAcc.msubs != 10 {
		fooAcc.mu.RUnlock()
		t.Fatalf("Expected account to have msubs of 10, got %d", fooAcc.msubs)
	}
	fooAcc.mu.RUnlock()

	// Create a client.
	c, cr, cs := createClient(t, s, fooKP)
	defer c.close()

	c.parseAsync(cs)
	expectPong(t, cr)

	c.parseAsync("SUB foo 1\r\nSUB bar 2\r\nSUB baz 3\r\nPING\r\n")
	l, _ := cr.ReadString('\n')

	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
	if !strings.Contains(l, "maximum subscriptions exceeded") {
		t.Fatalf("Expected an ERR for max subscriptions exceeded, got: %v", l)
	}
	// Read last PONG so does not hold up test.
	cr.ReadString('\n')
}

func TestJWTAccountLimitsMaxPayload(t *testing.T) {
	fooAC := newJWTTestAccountClaims()
	fooAC.Limits.Payload = 8
	s, fooKP, c, _ := setupJWTTestWitAccountClaims(t, fooAC, "+OK")
	defer s.Shutdown()
	defer c.close()

	fooPub, _ := fooKP.PublicKey()

	// Create a client.
	c, cr, cs := createClient(t, s, fooKP)
	defer c.close()

	c.parseAsync(cs)
	expectPong(t, cr)

	// Check to make sure we have the limit set.
	// Account first
	fooAcc, _ := s.LookupAccount(fooPub)
	fooAcc.mu.RLock()
	if fooAcc.mpay != 8 {
		fooAcc.mu.RUnlock()
		t.Fatalf("Expected account to have mpay of 8, got %d", fooAcc.mpay)
	}
	fooAcc.mu.RUnlock()
	// Now test that the client has limits too.
	c.mu.Lock()
	if c.mpay != 8 {
		c.mu.Unlock()
		t.Fatalf("Expected client to have mpay of 10, got %d", c.mpay)
	}
	c.mu.Unlock()

	c.parseAsync("PUB foo 4\r\nXXXX\r\nPING\r\n")
	expectPong(t, cr)

	c.parseAsync("PUB foo 10\r\nXXXXXXXXXX\r\nPING\r\n")
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
	if !strings.Contains(l, "Maximum Payload") {
		t.Fatalf("Expected an ERR for max payload violation, got: %v", l)
	}
}

func TestJWTAccountLimitsMaxPayloadButServerOverrides(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	// override with server setting of 4.
	opts := s.getOpts()
	opts.MaxPayload = 4

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)
	fooAC.Limits.Payload = 8
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)

	// Create a client.
	c, cr, cs := createClient(t, s, fooKP)
	defer c.close()

	c.parseAsync(cs)
	expectPong(t, cr)

	c.parseAsync("PUB foo 6\r\nXXXXXX\r\nPING\r\n")
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
	if !strings.Contains(l, "Maximum Payload") {
		t.Fatalf("Expected an ERR for max payload violation, got: %v", l)
	}
}

func TestJWTAccountLimitsMaxConns(t *testing.T) {
	fooAC := newJWTTestAccountClaims()
	fooAC.Limits.Conn = 8
	s, fooKP, c, _ := setupJWTTestWitAccountClaims(t, fooAC, "+OK")
	defer s.Shutdown()
	defer c.close()

	newClient := func(expPre string) *testAsyncClient {
		t.Helper()
		// Create a client.
		c, cr, cs := createClient(t, s, fooKP)
		c.parseAsync(cs)
		l, _ := cr.ReadString('\n')
		if !strings.HasPrefix(l, expPre) {
			t.Fatalf("Expected a response starting with %q, got %q", expPre, l)
		}
		return c
	}

	// A connection is created in setupJWTTestWitAccountClaims(), so limit
	// to 7 here (8 total).
	for i := 0; i < 7; i++ {
		c := newClient("PONG")
		defer c.close()
	}
	// Now this one should fail.
	c = newClient("-ERR ")
	c.close()
}

// This will test that we can switch from a public export to a private
// one and back with export claims to make sure the claim update mechanism
// is working properly.
func TestJWTAccountServiceImportAuthSwitch(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)
	serviceExport := &jwt.Export{Subject: "ngs.usage.*", Type: jwt.Service}
	fooAC.Exports.Add(serviceExport)
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)

	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)
	serviceImport := &jwt.Import{Account: fooPub, Subject: "ngs.usage", To: "ngs.usage.DEREK", Type: jwt.Service}
	barAC.Imports.Add(serviceImport)
	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)

	// Create a client that will send the request
	ca, cra, csa := createClient(t, s, barKP)
	defer ca.close()
	ca.parseAsync(csa)
	expectPong(t, cra)

	// Create the client that will respond to the requests.
	cb, crb, csb := createClient(t, s, fooKP)
	defer cb.close()
	cb.parseAsync(csb)
	expectPong(t, crb)

	// Create Subscriber.
	cb.parseAsync("SUB ngs.usage.* 1\r\nPING\r\n")
	expectPong(t, crb)

	// Send Request
	ca.parseAsync("PUB ngs.usage 2\r\nhi\r\nPING\r\n")
	expectPong(t, cra)

	// We should receive the request mapped into our account. PING needed to flush.
	cb.parseAsync("PING\r\n")
	expectMsg(t, crb, "ngs.usage.DEREK", "hi")

	// Now update to make the export private.
	fooACPrivate := jwt.NewAccountClaims(fooPub)
	serviceExport = &jwt.Export{Subject: "ngs.usage.*", Type: jwt.Service, TokenReq: true}
	fooACPrivate.Exports.Add(serviceExport)
	fooJWTPrivate, err := fooACPrivate.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWTPrivate)
	acc, _ := s.LookupAccount(fooPub)
	s.UpdateAccountClaims(acc, fooACPrivate)

	// Send Another Request
	ca.parseAsync("PUB ngs.usage 2\r\nhi\r\nPING\r\n")
	expectPong(t, cra)

	// We should not receive the request this time.
	cb.parseAsync("PING\r\n")
	expectPong(t, crb)

	// Now put it back again to public and make sure it works again.
	addAccountToMemResolver(s, fooPub, fooJWT)
	s.UpdateAccountClaims(acc, fooAC)

	// Send Request
	ca.parseAsync("PUB ngs.usage 2\r\nhi\r\nPING\r\n")
	expectPong(t, cra)

	// We should receive the request mapped into our account. PING needed to flush.
	cb.parseAsync("PING\r\n")
	expectMsg(t, crb, "ngs.usage.DEREK", "hi")
}

func TestJWTAccountServiceImportExpires(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)
	serviceExport := &jwt.Export{Subject: "foo", Type: jwt.Service}

	fooAC.Exports.Add(serviceExport)
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)

	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)
	serviceImport := &jwt.Import{Account: fooPub, Subject: "foo", Type: jwt.Service}

	barAC.Imports.Add(serviceImport)
	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)

	// Create a client that will send the request
	ca, cra, csa := createClient(t, s, barKP)
	defer ca.close()
	ca.parseAsync(csa)
	expectPong(t, cra)

	// Create the client that will respond to the requests.
	cb, crb, csb := createClient(t, s, fooKP)
	defer cb.close()
	cb.parseAsync(csb)
	expectPong(t, crb)

	// Create Subscriber.
	cb.parseAsync("SUB foo 1\r\nPING\r\n")
	expectPong(t, crb)

	// Send Request
	ca.parseAsync("PUB foo 2\r\nhi\r\nPING\r\n")
	expectPong(t, cra)

	// We should receive the request. PING needed to flush.
	cb.parseAsync("PING\r\n")
	expectMsg(t, crb, "foo", "hi")

	// Now update the exported service to require auth.
	fooAC = jwt.NewAccountClaims(fooPub)
	serviceExport = &jwt.Export{Subject: "foo", Type: jwt.Service, TokenReq: true}

	fooAC.Exports.Add(serviceExport)
	fooJWT, err = fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)
	acc, _ := s.LookupAccount(fooPub)
	s.UpdateAccountClaims(acc, fooAC)

	// Send Another Request
	ca.parseAsync("PUB foo 2\r\nhi\r\nPING\r\n")
	expectPong(t, cra)

	// We should not receive the request this time.
	cb.parseAsync("PING\r\n")
	expectPong(t, crb)

	// Now get an activation token such that it will work, but will expire.
	barAC = jwt.NewAccountClaims(barPub)
	serviceImport = &jwt.Import{Account: fooPub, Subject: "foo", Type: jwt.Service}

	now := time.Now()
	activation := jwt.NewActivationClaims(barPub)
	activation.ImportSubject = "foo"
	activation.ImportType = jwt.Service
	activation.IssuedAt = now.Add(-10 * time.Second).Unix()
	activation.Expires = now.Add(time.Second).Round(time.Second).Unix()
	actJWT, err := activation.Encode(fooKP)
	if err != nil {
		t.Fatalf("Error generating activation token: %v", err)
	}
	serviceImport.Token = actJWT

	barAC.Imports.Add(serviceImport)
	barJWT, err = barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)
	acc, _ = s.LookupAccount(barPub)
	s.UpdateAccountClaims(acc, barAC)

	// Now it should work again.
	// Send Another Request
	ca.parseAsync("PUB foo 3\r\nhi2\r\nPING\r\n")
	expectPong(t, cra)

	// We should receive the request. PING needed to flush.
	cb.parseAsync("PING\r\n")
	expectMsg(t, crb, "foo", "hi2")

	// Now wait for it to expire, then retry.
	waitTime := time.Duration(activation.Expires-time.Now().Unix()) * time.Second
	time.Sleep(waitTime + 250*time.Millisecond)

	// Send Another Request
	ca.parseAsync("PUB foo 3\r\nhi3\r\nPING\r\n")
	expectPong(t, cra)

	// We should NOT receive the request. PING needed to flush.
	cb.parseAsync("PING\r\n")
	expectPong(t, crb)
}

func TestJWTAccountURLResolver(t *testing.T) {
	for _, test := range []struct {
		name   string
		useTLS bool
	}{
		{"plain", false},
		{"tls", true},
	} {
		t.Run(test.name, func(t *testing.T) {
			kp, _ := nkeys.FromSeed(oSeed)
			akp, _ := nkeys.CreateAccount()
			apub, _ := akp.PublicKey()
			nac := jwt.NewAccountClaims(apub)
			ajwt, err := nac.Encode(kp)
			if err != nil {
				t.Fatalf("Error generating account JWT: %v", err)
			}

			hf := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				w.Write([]byte(ajwt))
			})
			var ts *httptest.Server
			if test.useTLS {
				tc := &TLSConfigOpts{
					CertFile: "../test/configs/certs/server-cert.pem",
					KeyFile:  "../test/configs/certs/server-key.pem",
					CaFile:   "../test/configs/certs/ca.pem",
				}
				tlsConfig, err := GenTLSConfig(tc)
				if err != nil {
					t.Fatalf("Error generating tls config: %v", err)
				}
				ts = httptest.NewUnstartedServer(hf)
				ts.TLS = tlsConfig
				ts.StartTLS()
			} else {
				ts = httptest.NewServer(hf)
			}
			defer ts.Close()

			confTemplate := `
				operator: %s
				listen: 127.0.0.1:-1
				resolver: URL("%s/ngs/v1/accounts/jwt/")
				resolver_tls {
					cert_file: "../test/configs/certs/client-cert.pem"
					key_file: "../test/configs/certs/client-key.pem"
					ca_file: "../test/configs/certs/ca.pem"
				}
			`
			conf := createConfFile(t, []byte(fmt.Sprintf(confTemplate, ojwt, ts.URL)))

			s, opts := RunServerWithConfig(conf)
			pub, _ := kp.PublicKey()
			opts.TrustedKeys = []string{pub}
			defer s.Shutdown()

			acc, _ := s.LookupAccount(apub)
			if acc == nil {
				t.Fatalf("Expected to receive an account")
			}
			if acc.Name != apub {
				t.Fatalf("Account name did not match claim key")
			}
		})
	}
}

func TestJWTAccountURLResolverTimeout(t *testing.T) {
	kp, _ := nkeys.FromSeed(oSeed)
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(kp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	basePath := "/ngs/v1/accounts/jwt/"

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == basePath {
			w.Write([]byte("ok"))
			return
		}
		// Purposely be slow on account lookup.
		time.Sleep(200 * time.Millisecond)
		w.Write([]byte(ajwt))
	}))
	defer ts.Close()

	confTemplate := `
		listen: 127.0.0.1:-1
		resolver: URL("%s%s")
    `
	conf := createConfFile(t, []byte(fmt.Sprintf(confTemplate, ts.URL, basePath)))

	s, opts := RunServerWithConfig(conf)
	pub, _ := kp.PublicKey()
	opts.TrustedKeys = []string{pub}
	defer s.Shutdown()

	// Lower default timeout to speed-up test
	s.AccountResolver().(*URLAccResolver).c.Timeout = 50 * time.Millisecond

	acc, _ := s.LookupAccount(apub)
	if acc != nil {
		t.Fatalf("Expected to not receive an account due to timeout")
	}
}

func TestJWTAccountURLResolverNoFetchOnReload(t *testing.T) {
	kp, _ := nkeys.FromSeed(oSeed)
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(kp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte(ajwt))
	}))
	defer ts.Close()

	confTemplate := `
		operator: %s
		listen: 127.0.0.1:-1
		resolver: URL("%s/ngs/v1/accounts/jwt/")
    `
	conf := createConfFile(t, []byte(fmt.Sprintf(confTemplate, ojwt, ts.URL)))

	s, _ := RunServerWithConfig(conf)
	defer s.Shutdown()

	acc, _ := s.LookupAccount(apub)
	if acc == nil {
		t.Fatalf("Expected to receive an account")
	}

	// Reload would produce a DATA race during the DeepEqual check for the account resolver,
	// so close the current one and we will create a new one that keeps track of fetch calls.
	ts.Close()

	fetch := int32(0)
	ts = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		atomic.AddInt32(&fetch, 1)
		w.Write([]byte(ajwt))
	}))
	defer ts.Close()

	changeCurrentConfigContentWithNewContent(t, conf, []byte(fmt.Sprintf(confTemplate, ojwt, ts.URL)))

	if err := s.Reload(); err != nil {
		t.Fatalf("Error on reload: %v", err)
	}
	if atomic.LoadInt32(&fetch) != 0 {
		t.Fatalf("Fetch invoked during reload")
	}

	// Now stop the resolver and make sure that on startup, we report URL resolver failure
	s.Shutdown()
	s = nil
	ts.Close()

	opts := LoadConfig(conf)
	if s, err := NewServer(opts); err == nil || !strings.Contains(err.Error(), "could not fetch") {
		if s != nil {
			s.Shutdown()
		}
		t.Fatalf("Expected error regarding account resolver, got %v", err)
	}
}

func TestJWTAccountURLResolverFetchFailureInServer1(t *testing.T) {
	const subj = "test"
	const crossAccSubj = "test"
	// Create Exporting Account
	expkp, _ := nkeys.CreateAccount()
	exppub, _ := expkp.PublicKey()
	expac := jwt.NewAccountClaims(exppub)
	expac.Exports.Add(&jwt.Export{
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	expjwt, err := expac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create importing Account
	impkp, _ := nkeys.CreateAccount()
	imppub, _ := impkp.PublicKey()
	impac := jwt.NewAccountClaims(imppub)
	impac.Imports.Add(&jwt.Import{
		Account: exppub,
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	impjwt, err := impac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Simulate an account server that drops the first request to exppub
	chanImpA := make(chan struct{}, 10)
	defer close(chanImpA)
	chanExpS := make(chan struct{}, 10)
	defer close(chanExpS)
	chanExpF := make(chan struct{}, 1)
	defer close(chanExpF)
	failureCnt := int32(0)
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == "/A/" {
			// Server startup
			w.Write(nil)
			chanImpA <- struct{}{}
		} else if r.URL.Path == "/A/"+imppub {
			w.Write([]byte(impjwt))
			chanImpA <- struct{}{}
		} else if r.URL.Path == "/A/"+exppub {
			if atomic.AddInt32(&failureCnt, 1) <= 1 {
				// skip the write to simulate the failure
				chanExpF <- struct{}{}
			} else {
				w.Write([]byte(expjwt))
				chanExpS <- struct{}{}
			}
		} else {
			t.Fatal("not expected")
		}
	}))
	defer ts.Close()
	// Create server
	confA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: URL("%s/A/")
    `, ojwt, ts.URL)))
	sA := RunServer(LoadConfig(confA))
	defer sA.Shutdown()
	// server observed one fetch on startup
	chanRecv(t, chanImpA, 10*time.Second)
	// Create first client
	ncA := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, impkp))
	defer ncA.Close()
	// create a test subscription
	subA, err := ncA.SubscribeSync(subj)
	if err != nil {
		t.Fatalf("Expected no error during subscribe: %v", err)
	}
	defer subA.Unsubscribe()
	// Connect of client triggered a fetch of both accounts
	// the fetch for the imported account will fail
	chanRecv(t, chanImpA, 10*time.Second)
	chanRecv(t, chanExpF, 10*time.Second)
	// create second client for user exporting
	ncB := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, expkp))
	defer ncB.Close()
	chanRecv(t, chanExpS, 10*time.Second)
	// Connect of client triggered another fetch, this time passing
	checkSubInterest(t, sA, imppub, subj, 10*time.Second)
	checkSubInterest(t, sA, exppub, crossAccSubj, 10*time.Second) // Will fail as a result of this issue
}

func TestJWTAccountURLResolverFetchFailurePushReorder(t *testing.T) {
	const subj = "test"
	const crossAccSubj = "test"
	// Create System Account
	syskp, _ := nkeys.CreateAccount()
	syspub, _ := syskp.PublicKey()
	sysAc := jwt.NewAccountClaims(syspub)
	sysjwt, err := sysAc.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create Exporting Account
	expkp, _ := nkeys.CreateAccount()
	exppub, _ := expkp.PublicKey()
	expac := jwt.NewAccountClaims(exppub)
	expjwt1, err := expac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	expac.Exports.Add(&jwt.Export{
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	expjwt2, err := expac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create importing Account
	impkp, _ := nkeys.CreateAccount()
	imppub, _ := impkp.PublicKey()
	impac := jwt.NewAccountClaims(imppub)
	impac.Imports.Add(&jwt.Import{
		Account: exppub,
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	impjwt, err := impac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Simulate an account server that does not serve the updated jwt for exppub
	chanImpA := make(chan struct{}, 10)
	defer close(chanImpA)
	chanExpS := make(chan struct{}, 10)
	defer close(chanExpS)
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == "/A/" {
			// Server startup
			w.Write(nil)
			chanImpA <- struct{}{}
		} else if r.URL.Path == "/A/"+imppub {
			w.Write([]byte(impjwt))
			chanImpA <- struct{}{}
		} else if r.URL.Path == "/A/"+exppub {
			// respond with jwt that does not have the export
			// this simulates an ordering issue
			w.Write([]byte(expjwt1))
			chanExpS <- struct{}{}
		} else if r.URL.Path == "/A/"+syspub {
			w.Write([]byte(sysjwt))
		} else {
			t.Fatal("not expected")
		}
	}))
	defer ts.Close()
	confA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: URL("%s/A/")
		system_account: %s
    `, ojwt, ts.URL, syspub)))
	sA := RunServer(LoadConfig(confA))
	defer sA.Shutdown()
	// server observed one fetch on startup
	chanRecv(t, chanImpA, 10*time.Second)
	// Create first client
	ncA := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, impkp))
	defer ncA.Close()
	// create a test subscription
	subA, err := ncA.SubscribeSync(subj)
	if err != nil {
		t.Fatalf("Expected no error during subscribe: %v", err)
	}
	defer subA.Unsubscribe()
	// Connect of client triggered a fetch of both accounts
	// the fetch for the imported account will fail
	chanRecv(t, chanImpA, 10*time.Second)
	chanRecv(t, chanExpS, 10*time.Second)
	// create second client for user exporting
	ncB := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, expkp))
	defer ncB.Close()
	// update expjwt2, this will correct the import issue
	sysc := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, syskp))
	defer sysc.Close()
	natsPub(t, sysc, fmt.Sprintf(accUpdateEventSubjNew, exppub), []byte(expjwt2))
	sysc.Flush()
	// updating expjwt should cause this to pass
	checkSubInterest(t, sA, imppub, subj, 10*time.Second)
	checkSubInterest(t, sA, exppub, crossAccSubj, 10*time.Second) // Will fail as a result of this issue
}

type captureDebugLogger struct {
	DummyLogger
	dbgCh chan string
}

func (l *captureDebugLogger) Debugf(format string, v ...any) {
	select {
	case l.dbgCh <- fmt.Sprintf(format, v...):
	default:
	}
}

func TestJWTAccountURLResolverPermanentFetchFailure(t *testing.T) {
	const crossAccSubj = "test"
	expkp, _ := nkeys.CreateAccount()
	exppub, _ := expkp.PublicKey()
	impkp, _ := nkeys.CreateAccount()
	imppub, _ := impkp.PublicKey()
	// Create System Account
	syskp, _ := nkeys.CreateAccount()
	syspub, _ := syskp.PublicKey()
	sysAc := jwt.NewAccountClaims(syspub)
	sysjwt, err := sysAc.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create 2 Accounts. Each importing from the other, but NO matching export
	expac := jwt.NewAccountClaims(exppub)
	expac.Imports.Add(&jwt.Import{
		Account: imppub,
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	expjwt, err := expac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create importing Account
	impac := jwt.NewAccountClaims(imppub)
	impac.Imports.Add(&jwt.Import{
		Account: exppub,
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	impjwt, err := impac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Simulate an account server that does not serve the updated jwt for exppub
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == "/A/" {
			// Server startup
			w.Write(nil)
		} else if r.URL.Path == "/A/"+imppub {
			w.Write([]byte(impjwt))
		} else if r.URL.Path == "/A/"+exppub {
			w.Write([]byte(expjwt))
		} else if r.URL.Path == "/A/"+syspub {
			w.Write([]byte(sysjwt))
		} else {
			t.Fatal("not expected")
		}
	}))
	defer ts.Close()
	confA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: URL("%s/A/")
		system_account: %s
    `, ojwt, ts.URL, syspub)))
	o := LoadConfig(confA)
	sA := RunServer(o)
	defer sA.Shutdown()
	l := &captureDebugLogger{dbgCh: make(chan string, 100)} // has enough space to not block
	sA.SetLogger(l, true, false)
	// Create clients
	ncA := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, impkp))
	defer ncA.Close()
	ncB := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, expkp))
	defer ncB.Close()
	sysc := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, syskp))
	defer sysc.Close()
	// push accounts
	natsPub(t, sysc, fmt.Sprintf(accUpdateEventSubjNew, imppub), []byte(impjwt))
	natsPub(t, sysc, fmt.Sprintf(accUpdateEventSubjOld, exppub), []byte(expjwt))
	sysc.Flush()
	importErrCnt := 0
	tmr := time.NewTimer(500 * time.Millisecond)
	defer tmr.Stop()
	for {
		select {
		case line := <-l.dbgCh:
			if strings.HasPrefix(line, "Error adding stream import to account") {
				importErrCnt++
			}
		case <-tmr.C:
			// connecting and updating, each cause 3 traces (2 + 1 on iteration) + 1 xtra fetch
			if importErrCnt != 7 {
				t.Fatalf("Expected 7 debug traces, got %d", importErrCnt)
			}
			return
		}
	}
}

func TestJWTAccountURLResolverFetchFailureInCluster(t *testing.T) {
	assertChanLen := func(x int, chans ...chan struct{}) {
		t.Helper()
		for _, c := range chans {
			if len(c) != x {
				t.Fatalf("length of channel is not %d", x)
			}
		}
	}
	const subj = ">"
	const crossAccSubj = "test"
	// Create Exporting Account
	expkp, _ := nkeys.CreateAccount()
	exppub, _ := expkp.PublicKey()
	expac := jwt.NewAccountClaims(exppub)
	expac.Exports.Add(&jwt.Export{
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	expjwt, err := expac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create importing Account
	impkp, _ := nkeys.CreateAccount()
	imppub, _ := impkp.PublicKey()
	impac := jwt.NewAccountClaims(imppub)
	impac.Imports.Add(&jwt.Import{
		Account: exppub,
		Subject: crossAccSubj,
		Type:    jwt.Stream,
	})
	impac.Exports.Add(&jwt.Export{
		Subject: "srvc",
		Type:    jwt.Service,
	})
	impjwt, err := impac.Encode(oKp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create User
	nkp, _ := nkeys.CreateUser()
	uSeed, _ := nkp.Seed()
	upub, _ := nkp.PublicKey()
	nuc := newJWTTestUserClaims()
	nuc.Subject = upub
	uJwt, err := nuc.Encode(impkp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}
	creds := genCredsFile(t, uJwt, uSeed)
	// Simulate an account server that drops the first request to /B/acc
	chanImpA := make(chan struct{}, 4)
	defer close(chanImpA)
	chanImpB := make(chan struct{}, 4)
	defer close(chanImpB)
	chanExpA := make(chan struct{}, 4)
	defer close(chanExpA)
	chanExpB := make(chan struct{}, 4)
	defer close(chanExpB)
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == "/A/" {
			// Server A startup
			w.Write(nil)
			chanImpA <- struct{}{}
		} else if r.URL.Path == "/B/" {
			// Server B startup
			w.Write(nil)
			chanImpB <- struct{}{}
		} else if r.URL.Path == "/A/"+imppub {
			// First Client connecting to Server A
			w.Write([]byte(impjwt))
			chanImpA <- struct{}{}
		} else if r.URL.Path == "/B/"+imppub {
			// Second Client connecting to Server B
			w.Write([]byte(impjwt))
			chanImpB <- struct{}{}
		} else if r.URL.Path == "/A/"+exppub {
			// First Client connecting to Server A
			w.Write([]byte(expjwt))
			chanExpA <- struct{}{}
		} else if r.URL.Path == "/B/"+exppub {
			// Second Client connecting to Server B
			w.Write([]byte(expjwt))
			chanExpB <- struct{}{}
		} else {
			t.Fatal("not expected")
		}
	}))
	defer ts.Close()
	// Create seed server A
	confA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: URL("%s/A/")
		cluster {
			name: clust
			no_advertise: true
			listen: 127.0.0.1:-1
		}
    `, ojwt, ts.URL)))
	sA := RunServer(LoadConfig(confA))
	defer sA.Shutdown()
	// Create Server B (using no_advertise to prevent failover)
	confB := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: URL("%s/B/")
		cluster {
			name: clust
			no_advertise: true
			listen: 127.0.0.1:-1
			routes [
				nats-route://127.0.0.1:%d
			]
		}
    `, ojwt, ts.URL, sA.opts.Cluster.Port)))
	sB := RunServer(LoadConfig(confB))
	defer sB.Shutdown()
	// startup cluster
	checkClusterFormed(t, sA, sB)
	// Both server observed one fetch on startup
	chanRecv(t, chanImpA, 10*time.Second)
	chanRecv(t, chanImpB, 10*time.Second)
	assertChanLen(0, chanImpA, chanImpB, chanExpA, chanExpB)
	// Create first client, directly connects to A
	urlA := fmt.Sprintf("nats://%s:%d", sA.opts.Host, sA.opts.Port)
	ncA, err := nats.Connect(urlA, nats.UserCredentials(creds),
		nats.DisconnectErrHandler(func(_ *nats.Conn, err error) {
			if err != nil {
				t.Fatal("error not expected in this test", err)
			}
		}),
		nats.ErrorHandler(func(_ *nats.Conn, _ *nats.Subscription, err error) {
			t.Fatal("error not expected in this test", err)
		}),
	)
	if err != nil {
		t.Fatalf("Expected to connect, got %v %s", err, urlA)
	}
	defer ncA.Close()
	// create a test subscription
	subA, err := ncA.SubscribeSync(subj)
	if err != nil {
		t.Fatalf("Expected no error during subscribe: %v", err)
	}
	defer subA.Unsubscribe()
	// Connect of client triggered a fetch by Server A
	chanRecv(t, chanImpA, 10*time.Second)
	chanRecv(t, chanExpA, 10*time.Second)
	assertChanLen(0, chanImpA, chanImpB, chanExpA, chanExpB)
	//time.Sleep(10 * time.Second)
	// create second client, directly connect to B
	urlB := fmt.Sprintf("nats://%s:%d", sB.opts.Host, sB.opts.Port)
	ncB, err := nats.Connect(urlB, nats.UserCredentials(creds), nats.NoReconnect())
	if err != nil {
		t.Fatalf("Expected to connect, got %v %s", err, urlB)
	}
	defer ncB.Close()
	// Connect of client triggered a fetch by Server B
	chanRecv(t, chanImpB, 10*time.Second)
	chanRecv(t, chanExpB, 10*time.Second)
	assertChanLen(0, chanImpA, chanImpB, chanExpA, chanExpB)
	checkClusterFormed(t, sA, sB)
	// the route subscription was lost due to the failed fetch
	// Now we test if some recover mechanism is in play
	checkSubInterest(t, sB, imppub, subj, 10*time.Second)         // Will fail as a result of this issue
	checkSubInterest(t, sB, exppub, crossAccSubj, 10*time.Second) // Will fail as a result of this issue
	if err := ncB.Publish(subj, []byte("msg")); err != nil {
		t.Fatalf("Expected to publish %v", err)
	}
	// expect the message from B to flow to A
	if m, err := subA.NextMsg(10 * time.Second); err != nil {
		t.Fatalf("Expected to receive a message %v", err)
	} else if string(m.Data) != "msg" {
		t.Fatalf("Expected to receive 'msg', got: %s", string(m.Data))
	}
	assertChanLen(0, chanImpA, chanImpB, chanExpA, chanExpB)
}

func TestJWTAccountURLResolverReturnDifferentOperator(t *testing.T) {
	// Create a valid chain of op/acc/usr using a different operator
	// This is so we can test if the server rejects this chain.
	// Create Operator
	op, _ := nkeys.CreateOperator()
	// Create Account, this account is the one returned by the resolver
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(op)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	// Create User
	nkp, _ := nkeys.CreateUser()
	uSeed, _ := nkp.Seed()
	upub, _ := nkp.PublicKey()
	nuc := newJWTTestUserClaims()
	nuc.Subject = upub
	uJwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}
	creds := genCredsFile(t, uJwt, uSeed)
	// Simulate an account server that was hijacked/mis configured
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte(ajwt))
	}))
	defer ts.Close()
	// Create Server
	confA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: URL("%s/A/")
    `, ojwt, ts.URL)))
	sA, _ := RunServerWithConfig(confA)
	defer sA.Shutdown()
	// Create first client, directly connects to A
	urlA := fmt.Sprintf("nats://%s:%d", sA.opts.Host, sA.opts.Port)
	if _, err := nats.Connect(urlA, nats.UserCredentials(creds),
		nats.DisconnectErrHandler(func(_ *nats.Conn, err error) {
			if err != nil {
				t.Fatal("error not expected in this test", err)
			}
		}),
		nats.ErrorHandler(func(_ *nats.Conn, _ *nats.Subscription, err error) {
			t.Fatal("error not expected in this test", err)
		}),
	); err == nil {
		t.Fatal("Expected connect to fail")
	}
	// Test if the server has the account in memory. (shouldn't)
	if v, ok := sA.accounts.Load(apub); ok {
		t.Fatalf("Expected account to NOT be in memory: %v", v.(*Account))
	}
}

func TestJWTUserSigningKey(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()

	// Check to make sure we would have an authTimer
	if !s.info.AuthRequired {
		t.Fatalf("Expect the server to require auth")
	}

	c, cr, _ := newClientForServer(s)
	defer c.close()
	// Don't send jwt field, should fail.
	c.parseAsync("CONNECT {\"verbose\":true,\"pedantic\":true}\r\nPING\r\n")
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}

	okp, _ := nkeys.FromSeed(oSeed)

	// Create an account
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()

	// Create a signing key for the account
	askp, _ := nkeys.CreateAccount()
	aspub, _ := askp.PublicKey()

	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	// Create a client with the account signing key
	c, cr, cs := createClientWithIssuer(t, s, askp, apub)
	defer c.close()

	// PING needed to flush the +OK/-ERR to us.
	// This should fail too since no account resolver is defined.
	c.parseAsync(cs)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}

	// Ok now let's walk through and make sure all is good.
	// We will set the account resolver by hand to a memory resolver.
	buildMemAccResolver(s)
	addAccountToMemResolver(s, apub, ajwt)

	// Create a client with a signing key
	c, cr, cs = createClientWithIssuer(t, s, askp, apub)
	defer c.close()
	// should fail because the signing key is not known
	c.parseAsync(cs)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error: %v", l)
	}

	// add a signing key
	nac.SigningKeys.Add(aspub)
	// update the memory resolver
	acc, _ := s.LookupAccount(apub)
	s.UpdateAccountClaims(acc, nac)

	// Create a client with a signing key
	c, cr, cs = createClientWithIssuer(t, s, askp, apub)
	defer c.close()

	// expect this to work
	c.parseAsync(cs)
	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "PONG") {
		t.Fatalf("Expected a PONG, got %q", l)
	}

	isClosed := func() bool {
		c.mu.Lock()
		defer c.mu.Unlock()
		return c.isClosed()
	}

	if isClosed() {
		t.Fatal("expected client to be alive")
	}
	// remove the signing key should bounce client
	nac.SigningKeys = nil
	acc, _ = s.LookupAccount(apub)
	s.UpdateAccountClaims(acc, nac)

	if !isClosed() {
		t.Fatal("expected client to be gone")
	}
}

func TestJWTAccountImportSignerRemoved(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Exporter keys
	srvKP, _ := nkeys.CreateAccount()
	srvPK, _ := srvKP.PublicKey()
	srvSignerKP, _ := nkeys.CreateAccount()
	srvSignerPK, _ := srvSignerKP.PublicKey()

	// Importer keys
	clientKP, _ := nkeys.CreateAccount()
	clientPK, _ := clientKP.PublicKey()

	createSrvJwt := func(signingKeys ...string) (string, *jwt.AccountClaims) {
		ac := jwt.NewAccountClaims(srvPK)
		ac.SigningKeys.Add(signingKeys...)
		ac.Exports.Add(&jwt.Export{Subject: "foo", Type: jwt.Service, TokenReq: true})
		ac.Exports.Add(&jwt.Export{Subject: "bar", Type: jwt.Stream, TokenReq: true})
		token, err := ac.Encode(okp)
		if err != nil {
			t.Fatalf("Error generating exporter JWT: %v", err)
		}
		return token, ac
	}

	createImportToken := func(sub string, kind jwt.ExportType) string {
		actC := jwt.NewActivationClaims(clientPK)
		actC.IssuerAccount = srvPK
		actC.ImportType = kind
		actC.ImportSubject = jwt.Subject(sub)
		token, err := actC.Encode(srvSignerKP)
		if err != nil {
			t.Fatal(err)
		}
		return token
	}

	createClientJwt := func() string {
		ac := jwt.NewAccountClaims(clientPK)
		ac.Imports.Add(&jwt.Import{Account: srvPK, Subject: "foo", Type: jwt.Service, Token: createImportToken("foo", jwt.Service)})
		ac.Imports.Add(&jwt.Import{Account: srvPK, Subject: "bar", Type: jwt.Stream, Token: createImportToken("bar", jwt.Stream)})
		token, err := ac.Encode(okp)
		if err != nil {
			t.Fatalf("Error generating importer JWT: %v", err)
		}
		return token
	}

	srvJWT, _ := createSrvJwt(srvSignerPK)
	addAccountToMemResolver(s, srvPK, srvJWT)

	clientJWT := createClientJwt()
	addAccountToMemResolver(s, clientPK, clientJWT)

	// Create a client that will send the request
	client, clientReader, clientCS := createClient(t, s, clientKP)
	defer client.close()
	client.parseAsync(clientCS)
	expectPong(t, clientReader)

	checkShadow := func(expected int) {
		t.Helper()
		client.mu.Lock()
		defer client.mu.Unlock()
		sub := client.subs["1"]
		count := 0
		if sub != nil {
			count = len(sub.shadow)
		}
		if count != expected {
			t.Fatalf("Expected shadows to be %d, got %d", expected, count)
		}
	}

	checkShadow(0)
	// Create the client that will respond to the requests.
	srv, srvReader, srvCS := createClient(t, s, srvKP)
	defer srv.close()
	srv.parseAsync(srvCS)
	expectPong(t, srvReader)

	// Create Subscriber.
	srv.parseAsync("SUB foo 1\r\nPING\r\n")
	expectPong(t, srvReader)

	// Send Request
	client.parseAsync("PUB foo 2\r\nhi\r\nPING\r\n")
	expectPong(t, clientReader)

	// We should receive the request. PING needed to flush.
	srv.parseAsync("PING\r\n")
	expectMsg(t, srvReader, "foo", "hi")

	client.parseAsync("SUB bar 1\r\nPING\r\n")
	expectPong(t, clientReader)
	checkShadow(1)

	srv.parseAsync("PUB bar 2\r\nhi\r\nPING\r\n")
	expectPong(t, srvReader)

	// We should receive from stream. PING needed to flush.
	client.parseAsync("PING\r\n")
	expectMsg(t, clientReader, "bar", "hi")

	// Now update the exported service no signer
	srvJWT, srvAC := createSrvJwt()
	addAccountToMemResolver(s, srvPK, srvJWT)
	acc, _ := s.LookupAccount(srvPK)
	s.UpdateAccountClaims(acc, srvAC)

	// Send Another Request
	client.parseAsync("PUB foo 2\r\nhi\r\nPING\r\n")
	expectPong(t, clientReader)

	// We should not receive the request this time.
	srv.parseAsync("PING\r\n")
	expectPong(t, srvReader)

	// Publish on the stream
	srv.parseAsync("PUB bar 2\r\nhi\r\nPING\r\n")
	expectPong(t, srvReader)

	// We should not receive from the stream this time
	client.parseAsync("PING\r\n")
	expectPong(t, clientReader)
	checkShadow(0)
}

func TestJWTAccountImportSignerDeadlock(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Exporter keys
	srvKP, _ := nkeys.CreateAccount()
	srvPK, _ := srvKP.PublicKey()
	srvSignerKP, _ := nkeys.CreateAccount()
	srvSignerPK, _ := srvSignerKP.PublicKey()

	// Importer keys
	clientKP, _ := nkeys.CreateAccount()
	clientPK, _ := clientKP.PublicKey()

	createSrvJwt := func(signingKeys ...string) (string, *jwt.AccountClaims) {
		ac := jwt.NewAccountClaims(srvPK)
		ac.SigningKeys.Add(signingKeys...)
		ac.Exports.Add(&jwt.Export{Subject: "foo", Type: jwt.Service, TokenReq: true})
		ac.Exports.Add(&jwt.Export{Subject: "bar", Type: jwt.Stream, TokenReq: true})
		token, err := ac.Encode(okp)
		if err != nil {
			t.Fatalf("Error generating exporter JWT: %v", err)
		}
		return token, ac
	}

	createImportToken := func(sub string, kind jwt.ExportType) string {
		actC := jwt.NewActivationClaims(clientPK)
		actC.IssuerAccount = srvPK
		actC.ImportType = kind
		actC.ImportSubject = jwt.Subject(sub)
		token, err := actC.Encode(srvSignerKP)
		if err != nil {
			t.Fatal(err)
		}
		return token
	}

	createClientJwt := func() string {
		ac := jwt.NewAccountClaims(clientPK)
		ac.Imports.Add(&jwt.Import{Account: srvPK, Subject: "foo", Type: jwt.Service, Token: createImportToken("foo", jwt.Service)})
		ac.Imports.Add(&jwt.Import{Account: srvPK, Subject: "bar", Type: jwt.Stream, Token: createImportToken("bar", jwt.Stream)})
		token, err := ac.Encode(okp)
		if err != nil {
			t.Fatalf("Error generating importer JWT: %v", err)
		}
		return token
	}

	srvJWT, _ := createSrvJwt(srvSignerPK)
	addAccountToMemResolver(s, srvPK, srvJWT)

	clientJWT := createClientJwt()
	addAccountToMemResolver(s, clientPK, clientJWT)

	acc, _ := s.LookupAccount(srvPK)
	// Have a go routine that constantly gets/releases the acc's write lock.
	// There was a bug that could cause AddServiceImportWithClaim to deadlock.
	ch := make(chan bool, 1)
	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		defer wg.Done()
		for {
			select {
			case <-ch:
				return
			default:
				acc.mu.Lock()
				acc.mu.Unlock()
				time.Sleep(time.Millisecond)
			}
		}
	}()

	// Create a client that will send the request
	client, clientReader, clientCS := createClient(t, s, clientKP)
	defer client.close()
	client.parseAsync(clientCS)
	expectPong(t, clientReader)

	close(ch)
	wg.Wait()
}

func TestJWTAccountImportWrongIssuerAccount(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	l := &captureErrorLogger{errCh: make(chan string, 2)}
	s.SetLogger(l, false, false)

	okp, _ := nkeys.FromSeed(oSeed)

	// Exporter keys
	srvKP, _ := nkeys.CreateAccount()
	srvPK, _ := srvKP.PublicKey()
	srvSignerKP, _ := nkeys.CreateAccount()
	srvSignerPK, _ := srvSignerKP.PublicKey()

	// Importer keys
	clientKP, _ := nkeys.CreateAccount()
	clientPK, _ := clientKP.PublicKey()

	createSrvJwt := func(signingKeys ...string) (string, *jwt.AccountClaims) {
		ac := jwt.NewAccountClaims(srvPK)
		ac.SigningKeys.Add(signingKeys...)
		ac.Exports.Add(&jwt.Export{Subject: "foo", Type: jwt.Service, TokenReq: true})
		ac.Exports.Add(&jwt.Export{Subject: "bar", Type: jwt.Stream, TokenReq: true})
		token, err := ac.Encode(okp)
		if err != nil {
			t.Fatalf("Error generating exporter JWT: %v", err)
		}
		return token, ac
	}

	createImportToken := func(sub string, kind jwt.ExportType) string {
		actC := jwt.NewActivationClaims(clientPK)
		// Reference ourselves, which is wrong.
		actC.IssuerAccount = clientPK
		actC.ImportType = kind
		actC.ImportSubject = jwt.Subject(sub)
		token, err := actC.Encode(srvSignerKP)
		if err != nil {
			t.Fatal(err)
		}
		return token
	}

	createClientJwt := func() string {
		ac := jwt.NewAccountClaims(clientPK)
		ac.Imports.Add(&jwt.Import{Account: srvPK, Subject: "foo", Type: jwt.Service, Token: createImportToken("foo", jwt.Service)})
		ac.Imports.Add(&jwt.Import{Account: srvPK, Subject: "bar", Type: jwt.Stream, Token: createImportToken("bar", jwt.Stream)})
		token, err := ac.Encode(okp)
		if err != nil {
			t.Fatalf("Error generating importer JWT: %v", err)
		}
		return token
	}

	srvJWT, _ := createSrvJwt(srvSignerPK)
	addAccountToMemResolver(s, srvPK, srvJWT)

	clientJWT := createClientJwt()
	addAccountToMemResolver(s, clientPK, clientJWT)

	// Create a client that will send the request
	client, clientReader, clientCS := createClient(t, s, clientKP)
	defer client.close()
	client.parseAsync(clientCS)
	if l, _, err := clientReader.ReadLine(); err != nil {
		t.Fatalf("Expected no Error, got: %v", err)
	} else if !strings.Contains(string(l), "-ERR 'Authorization Violation'") {
		t.Fatalf("Expected Error, got: %v", l)
	}
}

func TestJWTUserRevokedOnAccountUpdate(t *testing.T) {
	nac := newJWTTestAccountClaims()
	s, akp, c, cr := setupJWTTestWitAccountClaims(t, nac, "+OK")
	defer s.Shutdown()
	defer c.close()

	expectPong(t, cr)

	okp, _ := nkeys.FromSeed(oSeed)
	apub, _ := akp.PublicKey()

	c.mu.Lock()
	pub := c.user.Nkey
	c.mu.Unlock()

	// Now revoke the user.
	nac.Revoke(pub)

	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	// Update the account on the server.
	addAccountToMemResolver(s, apub, ajwt)
	acc, err := s.LookupAccount(apub)
	if err != nil {
		t.Fatalf("Error looking up the account: %v", err)
	}

	// This is simulating a system update for the account claims.
	go s.updateAccountWithClaimJWT(acc, ajwt)

	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
	if !strings.Contains(l, "Revoked") {
		t.Fatalf("Expected 'Revoked' to be in the error")
	}
}

func TestJWTUserRevoked(t *testing.T) {
	okp, _ := nkeys.FromSeed(oSeed)

	// Create a new user that we will make sure has been revoked.
	nkp, _ := nkeys.CreateUser()
	pub, _ := nkp.PublicKey()
	nuc := jwt.NewUserClaims(pub)

	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	// Revoke the user right away.
	nac.Revoke(pub)
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	// Sign for the user.
	jwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}

	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)
	addAccountToMemResolver(s, apub, ajwt)

	c, cr, l := newClientForServer(s)
	defer c.close()

	// Sign Nonce
	var info nonceInfo
	json.Unmarshal([]byte(l[5:]), &info)
	sigraw, _ := nkp.Sign([]byte(info.Nonce))
	sig := base64.RawURLEncoding.EncodeToString(sigraw)

	// PING needed to flush the +OK/-ERR to us.
	cs := fmt.Sprintf("CONNECT {\"jwt\":%q,\"sig\":\"%s\"}\r\nPING\r\n", jwt, sig)

	c.parseAsync(cs)

	l, _ = cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR ") {
		t.Fatalf("Expected an error")
	}
	if !strings.Contains(l, "Authorization") {
		t.Fatalf("Expected 'Revoked' to be in the error")
	}
}

// Test that an account update that revokes an import authorization cancels the import.
func TestJWTImportTokenRevokedAfter(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)

	// Now create Exports.
	export := &jwt.Export{Subject: "foo.private", Type: jwt.Stream, TokenReq: true}

	fooAC.Exports.Add(export)
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, fooPub, fooJWT)

	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)
	simport := &jwt.Import{Account: fooPub, Subject: "foo.private", Type: jwt.Stream}

	activation := jwt.NewActivationClaims(barPub)
	activation.ImportSubject = "foo.private"
	activation.ImportType = jwt.Stream
	actJWT, err := activation.Encode(fooKP)
	if err != nil {
		t.Fatalf("Error generating activation token: %v", err)
	}

	simport.Token = actJWT
	barAC.Imports.Add(simport)
	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)

	// Now revoke the export.
	decoded, _ := jwt.DecodeActivationClaims(actJWT)
	export.Revoke(decoded.Subject)

	fooJWT, err = fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, fooPub, fooJWT)

	fooAcc, _ := s.LookupAccount(fooPub)
	if fooAcc == nil {
		t.Fatalf("Expected to retrieve the account")
	}

	// Now lookup bar account and make sure it was revoked.
	acc, _ := s.LookupAccount(barPub)
	if acc == nil {
		t.Fatalf("Expected to retrieve the account")
	}
	if les := len(acc.imports.streams); les != 0 {
		t.Fatalf("Expected imports streams len of 0, got %d", les)
	}
}

// Test that an account update that revokes an import authorization cancels the import.
func TestJWTImportTokenRevokedBefore(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)

	// Now create Exports.
	export := &jwt.Export{Subject: "foo.private", Type: jwt.Stream, TokenReq: true}

	fooAC.Exports.Add(export)

	// Import account
	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)
	simport := &jwt.Import{Account: fooPub, Subject: "foo.private", Type: jwt.Stream}

	activation := jwt.NewActivationClaims(barPub)
	activation.ImportSubject = "foo.private"
	activation.ImportType = jwt.Stream
	actJWT, err := activation.Encode(fooKP)
	if err != nil {
		t.Fatalf("Error generating activation token: %v", err)
	}

	simport.Token = actJWT
	barAC.Imports.Add(simport)

	// Now revoke the export.
	decoded, _ := jwt.DecodeActivationClaims(actJWT)
	export.Revoke(decoded.Subject)

	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, fooPub, fooJWT)

	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, barPub, barJWT)

	fooAcc, _ := s.LookupAccount(fooPub)
	if fooAcc == nil {
		t.Fatalf("Expected to retrieve the account")
	}

	// Now lookup bar account and make sure it was revoked.
	acc, _ := s.LookupAccount(barPub)
	if acc == nil {
		t.Fatalf("Expected to retrieve the account")
	}
	if les := len(acc.imports.streams); les != 0 {
		t.Fatalf("Expected imports streams len of 0, got %d", les)
	}
}

func TestJWTCircularAccountServiceImport(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)

	barKP, _ := nkeys.CreateAccount()
	barPub, _ := barKP.PublicKey()
	barAC := jwt.NewAccountClaims(barPub)

	// Create service export/import for account foo
	serviceExport := &jwt.Export{Subject: "foo", Type: jwt.Service, TokenReq: true}
	serviceImport := &jwt.Import{Account: barPub, Subject: "bar", Type: jwt.Service}

	fooAC.Exports.Add(serviceExport)
	fooAC.Imports.Add(serviceImport)
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, fooPub, fooJWT)

	// Create service export/import for account bar
	serviceExport = &jwt.Export{Subject: "bar", Type: jwt.Service, TokenReq: true}
	serviceImport = &jwt.Import{Account: fooPub, Subject: "foo", Type: jwt.Service}

	barAC.Exports.Add(serviceExport)
	barAC.Imports.Add(serviceImport)
	barJWT, err := barAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	addAccountToMemResolver(s, barPub, barJWT)

	c, cr, cs := createClient(t, s, fooKP)
	defer c.close()

	c.parseAsync(cs)
	expectPong(t, cr)

	c.parseAsync("SUB foo 1\r\nPING\r\n")
	expectPong(t, cr)
}

// This test ensures that connected clients are properly evicted
// (no deadlock) if the max conns of an account has been lowered
// and the account is being updated (following expiration during
// a lookup).
func TestJWTAccountLimitsMaxConnsAfterExpired(t *testing.T) {
	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)

	okp, _ := nkeys.FromSeed(oSeed)

	// Create accounts and imports/exports.
	fooKP, _ := nkeys.CreateAccount()
	fooPub, _ := fooKP.PublicKey()
	fooAC := jwt.NewAccountClaims(fooPub)
	fooAC.Limits.Conn = 10
	fooJWT, err := fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)

	newClient := func(expPre string) *testAsyncClient {
		t.Helper()
		// Create a client.
		c, cr, cs := createClient(t, s, fooKP)
		c.parseAsync(cs)
		l, _ := cr.ReadString('\n')
		if !strings.HasPrefix(l, expPre) {
			t.Fatalf("Expected a response starting with %q, got %q", expPre, l)
		}
		go func() {
			for {
				if _, _, err := cr.ReadLine(); err != nil {
					return
				}
			}
		}()
		return c
	}

	for i := 0; i < 4; i++ {
		c := newClient("PONG")
		defer c.close()
	}

	// We will simulate that the account has expired. When
	// a new client will connect, the server will do a lookup
	// and find the account expired, which then will cause
	// a fetch and a rebuild of the account. Since max conns
	// is now lower, some clients should have been removed.
	acc, _ := s.LookupAccount(fooPub)
	acc.mu.Lock()
	acc.expired.Store(true)
	acc.updated = time.Now().UTC().Add(-2 * time.Second) // work around updating to quickly
	acc.mu.Unlock()

	// Now update with new expiration and max connections lowered to 2
	fooAC.Limits.Conn = 2
	fooJWT, err = fooAC.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}
	addAccountToMemResolver(s, fooPub, fooJWT)

	// Cause the lookup that will detect that account was expired
	// and rebuild it, and kick clients out.
	c := newClient("-ERR ")
	defer c.close()

	acc, _ = s.LookupAccount(fooPub)
	checkFor(t, 2*time.Second, 15*time.Millisecond, func() error {
		acc.mu.RLock()
		numClients := len(acc.clients)
		acc.mu.RUnlock()
		if numClients != 2 {
			return fmt.Errorf("Should have 2 clients, got %v", numClients)
		}
		return nil
	})
}

func TestJWTBearerToken(t *testing.T) {
	okp, _ := nkeys.FromSeed(oSeed)
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	nkp, _ := nkeys.CreateUser()
	pub, _ := nkp.PublicKey()
	nuc := newJWTTestUserClaims()
	nuc.Subject = pub
	// Set bearer token.
	nuc.BearerToken = true
	jwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}

	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)
	addAccountToMemResolver(s, apub, ajwt)

	c, cr, _ := newClientForServer(s)
	defer c.close()

	// Skip nonce signature...

	// PING needed to flush the +OK/-ERR to us.
	cs := fmt.Sprintf("CONNECT {\"jwt\":%q,\"verbose\":true,\"pedantic\":true}\r\nPING\r\n", jwt)
	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		c.parse([]byte(cs))
		wg.Done()
	}()
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "+OK") {
		t.Fatalf("Expected +OK, got %s", l)
	}
	wg.Wait()
}

func TestJWTBearerWithIssuerSameAsAccountToken(t *testing.T) {
	okp, _ := nkeys.FromSeed(oSeed)
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	nkp, _ := nkeys.CreateUser()
	pub, _ := nkp.PublicKey()
	nuc := newJWTTestUserClaims()
	// we are setting the issuer account here to trigger verification
	// of the issuer - the account has no signing keys, but the issuer
	// account is set to the public key of the account which should be OK.
	nuc.IssuerAccount = apub
	nuc.Subject = pub
	// Set bearer token.
	nuc.BearerToken = true
	jwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}

	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)
	addAccountToMemResolver(s, apub, ajwt)

	c, cr, _ := newClientForServer(s)
	defer c.close()

	// Skip nonce signature...

	// PING needed to flush the +OK/-ERR to us.
	cs := fmt.Sprintf("CONNECT {\"jwt\":%q,\"verbose\":true,\"pedantic\":true}\r\nPING\r\n", jwt)
	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		c.parse([]byte(cs))
		wg.Done()
	}()
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "+OK") {
		t.Fatalf("Expected +OK, got %s", l)
	}
	wg.Wait()
}

func TestJWTBearerWithBadIssuerToken(t *testing.T) {
	okp, _ := nkeys.FromSeed(oSeed)
	akp, _ := nkeys.CreateAccount()
	apub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(apub)
	ajwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	nkp, _ := nkeys.CreateUser()
	pub, _ := nkp.PublicKey()
	nuc := newJWTTestUserClaims()
	bakp, _ := nkeys.CreateAccount()
	bapub, _ := bakp.PublicKey()
	nuc.IssuerAccount = bapub
	nuc.Subject = pub
	// Set bearer token.
	nuc.BearerToken = true
	jwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}

	s := opTrustBasicSetup()
	defer s.Shutdown()
	buildMemAccResolver(s)
	addAccountToMemResolver(s, apub, ajwt)

	c, cr, _ := newClientForServer(s)
	defer c.close()

	// Skip nonce signature...

	// PING needed to flush the +OK/-ERR to us.
	cs := fmt.Sprintf("CONNECT {\"jwt\":%q,\"verbose\":true,\"pedantic\":true}\r\nPING\r\n", jwt)
	wg := sync.WaitGroup{}
	wg.Add(1)
	go func() {
		c.parse([]byte(cs))
		wg.Done()
	}()
	l, _ := cr.ReadString('\n')
	if !strings.HasPrefix(l, "-ERR") {
		t.Fatalf("Expected -ERR, got %s", l)
	}
	wg.Wait()
}

func TestJWTExpiredUserCredentialsRenewal(t *testing.T) {
	createTmpFile := func(t *testing.T, content []byte) string {
		t.Helper()
		conf := createTempFile(t, _EMPTY_)
		fName := conf.Name()
		conf.Close()
		if err := os.WriteFile(fName, content, 0666); err != nil {
			t.Fatalf("Error writing conf file: %v", err)
		}
		return fName
	}
	waitTime := func(ch chan bool, timeout time.Duration) error {
		select {
		case <-ch:
			return nil
		case <-time.After(timeout):
		}
		return errors.New("timeout")
	}

	okp, _ := nkeys.FromSeed(oSeed)
	akp, err := nkeys.CreateAccount()
	if err != nil {
		t.Fatalf("Error generating account")
	}
	aPub, _ := akp.PublicKey()
	nac := jwt.NewAccountClaims(aPub)
	aJwt, err := nac.Encode(okp)
	if err != nil {
		t.Fatalf("Error generating account JWT: %v", err)
	}

	kp, _ := nkeys.FromSeed(oSeed)
	oPub, _ := kp.PublicKey()
	opts := defaultServerOptions
	opts.TrustedKeys = []string{oPub}
	s := RunServer(&opts)
	if s == nil {
		t.Fatal("Server did not start")
	}
	defer s.Shutdown()
	buildMemAccResolver(s)
	addAccountToMemResolver(s, aPub, aJwt)

	nkp, _ := nkeys.CreateUser()
	pub, _ := nkp.PublicKey()
	uSeed, _ := nkp.Seed()
	nuc := newJWTTestUserClaims()
	nuc.Subject = pub
	nuc.Expires = time.Now().Add(time.Second).Unix()
	uJwt, err := nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error generating user JWT: %v", err)
	}

	creds, err := jwt.FormatUserConfig(uJwt, uSeed)
	if err != nil {
		t.Fatalf("Error encoding credentials: %v", err)
	}
	chainedFile := createTmpFile(t, creds)

	rch := make(chan bool)

	url := fmt.Sprintf("nats://%s:%d", s.opts.Host, s.opts.Port)
	nc, err := nats.Connect(url,
		nats.UserCredentials(chainedFile),
		nats.ReconnectWait(25*time.Millisecond),
		nats.ReconnectJitter(0, 0),
		nats.MaxReconnects(2),
		nats.ErrorHandler(noOpErrHandler),
		nats.ReconnectHandler(func(nc *nats.Conn) {
			rch <- true
		}),
	)
	if err != nil {
		t.Fatalf("Expected to connect, got %v %s", err, url)
	}
	defer nc.Close()

	// Place new credentials underneath.
	nuc.Expires = time.Now().Add(30 * time.Second).Unix()
	uJwt, err = nuc.Encode(akp)
	if err != nil {
		t.Fatalf("Error encoding user jwt: %v", err)
	}
	creds, err = jwt.FormatUserConfig(uJwt, uSeed)
	if err != nil {
		t.Fatalf("Error encoding credentials: %v", err)
	}
	if err := os.WriteFile(chainedFile, creds, 0666); err != nil {
		t.Fatalf("Error writing conf file: %v", err)
	}

	// Make sure we get disconnected and reconnected first.
	if err := waitTime(rch, 2*time.Second); err != nil {
		t.Fatal("Should have reconnected.")
	}

	// We should not have been closed.
	if nc.IsClosed() {
		t.Fatal("Got disconnected when we should have reconnected.")
	}

	// Check that we clear the lastErr that can cause the disconnect.
	// Our reconnect CB will happen before the clear. So check after a bit.
	time.Sleep(50 * time.Millisecond)
	if nc.LastError() != nil {
		t.Fatalf("Expected lastErr to be cleared, got %q", nc.LastError())
	}
}

func updateJwt(t *testing.T, url string, creds string, jwt string, respCnt int) int {
	t.Helper()
	require_NextMsg := func(sub *nats.Subscription) bool {
		t.Helper()
		msg := natsNexMsg(t, sub, time.Second)
		content := make(map[string]any)
		json.Unmarshal(msg.Data, &content)
		if _, ok := content["data"]; ok {
			return true
		}
		return false
	}
	c := natsConnect(t, url, nats.UserCredentials(creds),
		nats.DisconnectErrHandler(func(_ *nats.Conn, err error) {
			if err != nil {
				t.Fatal("error not expected in this test", err)
			}
		}),
		nats.ErrorHandler(func(_ *nats.Conn, _ *nats.Subscription, err error) {
			t.Fatal("error not expected in this test", err)
		}),
	)
	defer c.Close()
	resp := c.NewRespInbox()
	sub := natsSubSync(t, c, resp)
	err := sub.AutoUnsubscribe(respCnt)
	require_NoError(t, err)
	require_NoError(t, c.PublishRequest(accClaimsReqSubj, resp, []byte(jwt)))
	passCnt := 0
	for i := 0; i < respCnt; i++ {
		if require_NextMsg(sub) {
			passCnt++
		}
	}
	return passCnt
}

func require_JWTAbsent(t *testing.T, dir string, pub string) {
	t.Helper()
	_, err := os.Stat(filepath.Join(dir, pub+".jwt"))
	require_Error(t, err)
	require_True(t, os.IsNotExist(err))
}

func require_JWTPresent(t *testing.T, dir string, pub string) {
	t.Helper()
	_, err := os.Stat(filepath.Join(dir, pub+".jwt"))
	require_NoError(t, err)
}

func require_JWTEqual(t *testing.T, dir string, pub string, jwt string) {
	t.Helper()
	content, err := os.ReadFile(filepath.Join(dir, pub+".jwt"))
	require_NoError(t, err)
	require_Equal(t, string(content), jwt)
}

func createTempFile(t testing.TB, prefix string) *os.File {
	t.Helper()
	tempDir := t.TempDir()
	f, err := os.CreateTemp(tempDir, prefix)
	require_NoError(t, err)
	return f
}

func removeDir(t testing.TB, dir string) {
	t.Helper()
	if err := os.RemoveAll(dir); err != nil {
		t.Fatal(err)
	}
}

func removeFile(t testing.TB, p string) {
	t.Helper()
	if err := os.Remove(p); err != nil {
		t.Fatal(err)
	}
}

func writeJWT(t *testing.T, dir string, pub string, jwt string) {
	t.Helper()
	err := os.WriteFile(filepath.Join(dir, pub+".jwt"), []byte(jwt), 0644)
	require_NoError(t, err)
}

func TestJWTAccountNATSResolverFetch(t *testing.T) {
	origEventsHBInterval := eventsHBInterval
	eventsHBInterval = 50 * time.Millisecond // speed up eventing
	defer func() { eventsHBInterval = origEventsHBInterval }()
	require_NoLocalOrRemoteConnections := func(account string, srvs ...*Server) {
		t.Helper()
		for _, srv := range srvs {
			if acc, ok := srv.accounts.Load(account); ok {
				checkAccClientsCount(t, acc.(*Account), 0)
			}
		}
	}
	// After each connection check, require_XConnection and connect assures that
	// listed server have no connections for the account used
	require_1Connection := func(url, creds, acc string, srvs ...*Server) {
		t.Helper()
		func() {
			t.Helper()
			c := natsConnect(t, url, nats.UserCredentials(creds))
			defer c.Close()
			if _, err := nats.Connect(url, nats.UserCredentials(creds)); err == nil {
				t.Fatal("Second connection was supposed to fail due to limits")
			} else if !strings.Contains(err.Error(), ErrTooManyAccountConnections.Error()) {
				t.Fatal("Second connection was supposed to fail with too many conns")
			}
		}()
		require_NoLocalOrRemoteConnections(acc, srvs...)
	}
	require_2Connection := func(url, creds, acc string, srvs ...*Server) {
		t.Helper()
		func() {
			t.Helper()
			c1 := natsConnect(t, url, nats.UserCredentials(creds))
			defer c1.Close()
			c2 := natsConnect(t, url, nats.UserCredentials(creds))
			defer c2.Close()
			if _, err := nats.Connect(url, nats.UserCredentials(creds)); err == nil {
				t.Fatal("Third connection was supposed to fail due to limits")
			} else if !strings.Contains(err.Error(), ErrTooManyAccountConnections.Error()) {
				t.Fatal("Third connection was supposed to fail with too many conns")
			}
		}()
		require_NoLocalOrRemoteConnections(acc, srvs...)
	}
	connect := func(url string, credsfile string, acc string, srvs ...*Server) {
		t.Helper()
		nc := natsConnect(t, url, nats.UserCredentials(credsfile), nats.Timeout(5*time.Second))
		nc.Close()
		require_NoLocalOrRemoteConnections(acc, srvs...)
	}
	createAccountAndUser := func(limit bool, done chan struct{}, pubKey, jwt1, jwt2, creds *string) {
		t.Helper()
		kp, _ := nkeys.CreateAccount()
		*pubKey, _ = kp.PublicKey()
		claim := jwt.NewAccountClaims(*pubKey)
		if limit {
			claim.Limits.Conn = 1
		}
		var err error
		*jwt1, err = claim.Encode(oKp)
		require_NoError(t, err)
		// need to assure that create time differs (resolution is sec)
		time.Sleep(time.Millisecond * 1100)
		// create updated claim allowing more connections
		if limit {
			claim.Limits.Conn = 2
		}
		*jwt2, err = claim.Encode(oKp)
		require_NoError(t, err)
		ukp, _ := nkeys.CreateUser()
		seed, _ := ukp.Seed()
		upub, _ := ukp.PublicKey()
		uclaim := newJWTTestUserClaims()
		uclaim.Subject = upub
		ujwt, err := uclaim.Encode(kp)
		require_NoError(t, err)
		*creds = genCredsFile(t, ujwt, seed)
		done <- struct{}{}
	}
	// Create Accounts and corresponding user creds. Do so concurrently to speed up the test
	doneChan := make(chan struct{}, 5)
	defer close(doneChan)
	var syspub, sysjwt, dummy1, sysCreds string
	go createAccountAndUser(false, doneChan, &syspub, &sysjwt, &dummy1, &sysCreds)
	var apub, ajwt1, ajwt2, aCreds string
	go createAccountAndUser(true, doneChan, &apub, &ajwt1, &ajwt2, &aCreds)
	var bpub, bjwt1, bjwt2, bCreds string
	go createAccountAndUser(true, doneChan, &bpub, &bjwt1, &bjwt2, &bCreds)
	var cpub, cjwt1, cjwt2, cCreds string
	go createAccountAndUser(true, doneChan, &cpub, &cjwt1, &cjwt2, &cCreds)
	var dpub, djwt1, dummy2, dCreds string // extra user used later in the test in order to test limits
	go createAccountAndUser(true, doneChan, &dpub, &djwt1, &dummy2, &dCreds)
	for i := 0; i < cap(doneChan); i++ {
		<-doneChan
	}
	// Create one directory for each server
	dirA := t.TempDir()
	dirB := t.TempDir()
	dirC := t.TempDir()
	// simulate a restart of the server by storing files in them
	// Server A/B will completely sync, so after startup each server
	// will contain the union off all stored/configured jwt
	// Server C will send out lookup requests for jwt it does not store itself
	writeJWT(t, dirA, apub, ajwt1)
	writeJWT(t, dirB, bpub, bjwt1)
	writeJWT(t, dirC, cpub, cjwt1)
	// Create seed server A (using no_advertise to prevent fail over)
	confA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-A
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			interval: "200ms"
			limit: 4
		}
		resolver_preload: {
			%s: %s
		}
		cluster {
			name: clust
			listen: 127.0.0.1:-1
			no_advertise: true
		}
    `, ojwt, syspub, dirA, cpub, cjwt1)))
	sA, _ := RunServerWithConfig(confA)
	defer sA.Shutdown()
	// during startup resolver_preload causes the directory to contain data
	require_JWTPresent(t, dirA, cpub)
	// Create Server B (using no_advertise to prevent fail over)
	confB := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-B
		operator: %s
		system_account: %s
		resolver: {
			type: full

			dir: '%s'
			interval: "200ms"
			limit: 4
		}
		cluster {
			name: clust
			listen: 127.0.0.1:-1
			no_advertise: true
			routes [
				nats-route://127.0.0.1:%d
			]
		}
    `, ojwt, syspub, dirB, sA.opts.Cluster.Port)))
	sB, _ := RunServerWithConfig(confB)
	defer sB.Shutdown()
	// Create Server C (using no_advertise to prevent fail over)
	fmtC := `
		listen: 127.0.0.1:-1
		server_name: srv-C
		operator: %s
		system_account: %s
		resolver: {
			type: cache
			dir: '%s'
			ttl: "%dms"
			limit: 4
		}
		cluster {
			name: clust
			listen: 127.0.0.1:-1
			no_advertise: true
			routes [
				nats-route://127.0.0.1:%d
			]
		}
    `
	confClongTTL := createConfFile(t, []byte(fmt.Sprintf(fmtC, ojwt, syspub, dirC, 10000, sA.opts.Cluster.Port)))
	confCshortTTL := createConfFile(t, []byte(fmt.Sprintf(fmtC, ojwt, syspub, dirC, 1000, sA.opts.Cluster.Port)))
	sC, _ := RunServerWithConfig(confClongTTL) // use long ttl to assure it is not kicking
	defer sC.Shutdown()
	// startup cluster
	checkClusterFormed(t, sA, sB, sC)
	time.Sleep(500 * time.Millisecond) // wait for the protocol to converge
	// Check all accounts
	require_JWTPresent(t, dirA, apub) // was already present on startup
	require_JWTPresent(t, dirB, apub) // was copied from server A
	require_JWTAbsent(t, dirC, apub)
	require_JWTPresent(t, dirA, bpub) // was copied from server B
	require_JWTPresent(t, dirB, bpub) // was already present on startup
	require_JWTAbsent(t, dirC, bpub)
	require_JWTPresent(t, dirA, cpub) // was present in preload
	require_JWTPresent(t, dirB, cpub) // was copied from server A
	require_JWTPresent(t, dirC, cpub) // was already present on startup
	// This is to test that connecting to it still works
	require_JWTAbsent(t, dirA, syspub)
	require_JWTAbsent(t, dirB, syspub)
	require_JWTAbsent(t, dirC, syspub)
	// system account client can connect to every server
	connect(sA.ClientURL(), sysCreds, "")
	connect(sB.ClientURL(), sysCreds, "")
	connect(sC.ClientURL(), sysCreds, "")
	checkClusterFormed(t, sA, sB, sC)
	// upload system account and require a response from each server
	passCnt := updateJwt(t, sA.ClientURL(), sysCreds, sysjwt, 3)
	require_True(t, passCnt == 3)
	require_JWTPresent(t, dirA, syspub) // was just received
	require_JWTPresent(t, dirB, syspub) // was just received
	require_JWTPresent(t, dirC, syspub) // was just received
	// Only files missing are in C, which is only caching
	connect(sC.ClientURL(), aCreds, apub, sA, sB, sC)
	connect(sC.ClientURL(), bCreds, bpub, sA, sB, sC)
	require_JWTPresent(t, dirC, apub) // was looked up form A or B
	require_JWTPresent(t, dirC, bpub) // was looked up from A or B
	// Check limits and update jwt B connecting to server A
	for port, v := range map[string]struct{ pub, jwt, creds string }{
		sB.ClientURL(): {bpub, bjwt2, bCreds},
		sC.ClientURL(): {cpub, cjwt2, cCreds},
	} {
		require_1Connection(sA.ClientURL(), v.creds, v.pub, sA, sB, sC)
		require_1Connection(sB.ClientURL(), v.creds, v.pub, sA, sB, sC)
		require_1Connection(sC.ClientURL(), v.creds, v.pub, sA, sB, sC)
		passCnt := updateJwt(t, port, sysCreds, v.jwt, 3)
		require_True(t, passCnt == 3)
		require_2Connection(sA.ClientURL(), v.creds, v.pub, sA, sB, sC)
		require_2Connection(sB.ClientURL(), v.creds, v.pub, sA, sB, sC)
		require_2Connection(sC.ClientURL(), v.creds, v.pub, sA, sB, sC)
		require_JWTEqual(t, dirA, v.pub, v.jwt)
		require_JWTEqual(t, dirB, v.pub, v.jwt)
		require_JWTEqual(t, dirC, v.pub, v.jwt)
	}
	// Simulates A having missed an update
	// shutting B down as it has it will directly connect to A and connect right away
	sB.Shutdown()
	writeJWT(t, dirB, apub, ajwt2) // this will be copied to server A
	sB, _ = RunServerWithConfig(confB)
	defer sB.Shutdown()
	checkClusterFormed(t, sA, sB, sC)
	time.Sleep(500 * time.Millisecond) // wait for the protocol to converge
	// Restart server C. this is a workaround to force C to do a lookup in the absence of account cleanup
	sC.Shutdown()
	sC, _ = RunServerWithConfig(confClongTTL) //TODO remove this once we clean up accounts
	defer sC.Shutdown()
	require_JWTEqual(t, dirA, apub, ajwt2) // was copied from server B
	require_JWTEqual(t, dirB, apub, ajwt2) // was restarted with this
	require_JWTEqual(t, dirC, apub, ajwt1) // still contains old cached value
	require_2Connection(sA.ClientURL(), aCreds, apub, sA, sB, sC)
	require_2Connection(sB.ClientURL(), aCreds, apub, sA, sB, sC)
	require_1Connection(sC.ClientURL(), aCreds, apub, sA, sB, sC)
	// Restart server C. this is a workaround to force C to do a lookup in the absence of account cleanup
	sC.Shutdown()
	sC, _ = RunServerWithConfig(confCshortTTL) //TODO remove this once we clean up accounts
	defer sC.Shutdown()
	require_JWTEqual(t, dirC, apub, ajwt1) // still contains old cached value
	checkClusterFormed(t, sA, sB, sC)
	// Force next connect to do a lookup exceeds ttl
	fname := filepath.Join(dirC, apub+".jwt")
	checkFor(t, 2*time.Second, 100*time.Millisecond, func() error {
		_, err := os.Stat(fname)
		if os.IsNotExist(err) {
			return nil
		}
		return fmt.Errorf("File not removed in time")
	})
	connect(sC.ClientURL(), aCreds, apub, sA, sB, sC) // When lookup happens
	require_JWTEqual(t, dirC, apub, ajwt2)            // was looked up form A or B
	require_2Connection(sC.ClientURL(), aCreds, apub, sA, sB, sC)
	// Test exceeding limit. For the exclusive directory resolver, limit is a stop gap measure.
	// It is not expected to be hit. When hit the administrator is supposed to take action.
	passCnt = updateJwt(t, sA.ClientURL(), sysCreds, djwt1, 3)
	require_True(t, passCnt == 1) // Only Server C updated
	for _, srv := range []*Server{sA, sB, sC} {
		if a, ok := srv.accounts.Load(syspub); ok {
			acc := a.(*Account)
			checkFor(t, time.Second, 20*time.Millisecond, func() error {
				acc.mu.Lock()
				defer acc.mu.Unlock()
				if acc.ctmr != nil {
					return fmt.Errorf("Timer still exists")
				}
				return nil
			})
		}
	}
}

func TestJWTAccountNATSResolverCrossClusterFetch(t *testing.T) {
	connect := func(url string, credsfile string) {
		t.Helper()
		nc := natsConnect(t, url, nats.UserCredentials(credsfile))
		nc.Close()
	}
	createAccountAndUser := func(done chan struct{}, pubKey, jwt1, jwt2, creds *string) {
		t.Helper()
		kp, _ := nkeys.CreateAccount()
		*pubKey, _ = kp.PublicKey()
		claim := jwt.NewAccountClaims(*pubKey)
		var err error
		*jwt1, err = claim.Encode(oKp)
		require_NoError(t, err)
		// need to assure that create time differs (resolution is sec)
		time.Sleep(time.Millisecond * 1100)
		// create updated claim
		claim.Tags.Add("tag")
		*jwt2, err = claim.Encode(oKp)
		require_NoError(t, err)
		ukp, _ := nkeys.CreateUser()
		seed, _ := ukp.Seed()
		upub, _ := ukp.PublicKey()
		uclaim := newJWTTestUserClaims()
		uclaim.Subject = upub
		ujwt, err := uclaim.Encode(kp)
		require_NoError(t, err)
		*creds = genCredsFile(t, ujwt, seed)
		done <- struct{}{}
	}
	// Create Accounts and corresponding user creds. Do so concurrently to speed up the test
	doneChan := make(chan struct{}, 3)
	defer close(doneChan)
	var syspub, sysjwt, dummy1, sysCreds string
	go createAccountAndUser(doneChan, &syspub, &sysjwt, &dummy1, &sysCreds)
	var apub, ajwt1, ajwt2, aCreds string
	go createAccountAndUser(doneChan, &apub, &ajwt1, &ajwt2, &aCreds)
	var bpub, bjwt1, bjwt2, bCreds string
	go createAccountAndUser(doneChan, &bpub, &bjwt1, &bjwt2, &bCreds)
	for i := 0; i < cap(doneChan); i++ {
		<-doneChan
	}
	// Create one directory for each server
	dirAA := t.TempDir()
	dirAB := t.TempDir()
	dirBA := t.TempDir()
	dirBB := t.TempDir()
	// simulate a restart of the server by storing files in them
	// Server AA & AB will completely sync
	// Server BA & BB will completely sync
	// Be aware that no syncing will occur between cluster
	writeJWT(t, dirAA, apub, ajwt1)
	writeJWT(t, dirBA, bpub, bjwt1)
	// Create seed server A (using no_advertise to prevent fail over)
	confAA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-A-A
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			interval: "200ms"
		}
		gateway: {
			name: "clust-A"
			listen: 127.0.0.1:-1
		}
		cluster {
			name: clust-A
			listen: 127.0.0.1:-1
			no_advertise: true
		}
       `, ojwt, syspub, dirAA)))
	sAA, _ := RunServerWithConfig(confAA)
	defer sAA.Shutdown()
	// Create Server B (using no_advertise to prevent fail over)
	confAB := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-A-B
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			interval: "200ms"
		}
		gateway: {
			name: "clust-A"
			listen: 127.0.0.1:-1
		}
		cluster {
			name: clust-A
			listen: 127.0.0.1:-1
			no_advertise: true
			routes [
				nats-route://127.0.0.1:%d
			]
		}
       `, ojwt, syspub, dirAB, sAA.opts.Cluster.Port)))
	sAB, _ := RunServerWithConfig(confAB)
	defer sAB.Shutdown()
	// Create Server C (using no_advertise to prevent fail over)
	confBA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-B-A
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			interval: "200ms"
		}
		gateway: {
			name: "clust-B"
			listen: 127.0.0.1:-1
			gateways: [
				{name: "clust-A", url: "nats://127.0.0.1:%d"},
			]
		}
		cluster {
			name: clust-B
			listen: 127.0.0.1:-1
			no_advertise: true
		}
       `, ojwt, syspub, dirBA, sAA.opts.Gateway.Port)))
	sBA, _ := RunServerWithConfig(confBA)
	defer sBA.Shutdown()
	// Create Server BA (using no_advertise to prevent fail over)
	confBB := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-B-B
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			interval: "200ms"
		}
		cluster {
			name: clust-B
			listen: 127.0.0.1:-1
			no_advertise: true
			routes [
				nats-route://127.0.0.1:%d
			]
		}
		gateway: {
			name: "clust-B"
			listen: 127.0.0.1:-1
			gateways: [
				{name: "clust-A", url: "nats://127.0.0.1:%d"},
			]
		}
       `, ojwt, syspub, dirBB, sBA.opts.Cluster.Port, sAA.opts.Cluster.Port)))
	sBB, _ := RunServerWithConfig(confBB)
	defer sBB.Shutdown()
	// Assert topology
	checkClusterFormed(t, sAA, sAB)
	checkClusterFormed(t, sBA, sBB)
	waitForOutboundGateways(t, sAA, 1, 5*time.Second)
	waitForOutboundGateways(t, sAB, 1, 5*time.Second)
	waitForOutboundGateways(t, sBA, 1, 5*time.Second)
	waitForOutboundGateways(t, sBB, 1, 5*time.Second)
	time.Sleep(500 * time.Millisecond)                 // wait for the protocol to converge
	updateJwt(t, sAA.ClientURL(), sysCreds, sysjwt, 4) // update system account jwt on all server
	require_JWTEqual(t, dirAA, syspub, sysjwt)         // assure this update made it to every server
	require_JWTEqual(t, dirAB, syspub, sysjwt)         // assure this update made it to every server
	require_JWTEqual(t, dirBA, syspub, sysjwt)         // assure this update made it to every server
	require_JWTEqual(t, dirBB, syspub, sysjwt)         // assure this update made it to every server
	require_JWTAbsent(t, dirAA, bpub)                  // assure that jwt are not synced across cluster
	require_JWTAbsent(t, dirAB, bpub)                  // assure that jwt are not synced across cluster
	require_JWTAbsent(t, dirBA, apub)                  // assure that jwt are not synced across cluster
	require_JWTAbsent(t, dirBB, apub)                  // assure that jwt are not synced across cluster
	connect(sAA.ClientURL(), aCreds)                   // connect to cluster where jwt was initially stored
	connect(sAB.ClientURL(), aCreds)                   // connect to cluster where jwt was initially stored
	connect(sBA.ClientURL(), bCreds)                   // connect to cluster where jwt was initially stored
	connect(sBB.ClientURL(), bCreds)                   // connect to cluster where jwt was initially stored
	time.Sleep(500 * time.Millisecond)                 // wait for the protocol to (NOT) converge
	require_JWTAbsent(t, dirAA, bpub)                  // assure that jwt are still not synced across cluster
	require_JWTAbsent(t, dirAB, bpub)                  // assure that jwt are still not synced across cluster
	require_JWTAbsent(t, dirBA, apub)                  // assure that jwt are still not synced across cluster
	require_JWTAbsent(t, dirBB, apub)                  // assure that jwt are still not synced across cluster
	// We have verified that account B does not exist in cluster A, neither does account A in cluster B
	// Despite that clients from account B can connect to server A, same for account A in cluster B
	connect(sAA.ClientURL(), bCreds)                  // connect to cluster where jwt was not initially stored
	connect(sAB.ClientURL(), bCreds)                  // connect to cluster where jwt was not initially stored
	connect(sBA.ClientURL(), aCreds)                  // connect to cluster where jwt was not initially stored
	connect(sBB.ClientURL(), aCreds)                  // connect to cluster where jwt was not initially stored
	require_JWTEqual(t, dirAA, bpub, bjwt1)           // assure that now jwt used in connect is stored
	require_JWTEqual(t, dirAB, bpub, bjwt1)           // assure that now jwt used in connect is stored
	require_JWTEqual(t, dirBA, apub, ajwt1)           // assure that now jwt used in connect is stored
	require_JWTEqual(t, dirBB, apub, ajwt1)           // assure that now jwt used in connect is stored
	updateJwt(t, sAA.ClientURL(), sysCreds, bjwt2, 4) // update bjwt, expect updates from everywhere
	updateJwt(t, sBA.ClientURL(), sysCreds, ajwt2, 4) // update ajwt, expect updates from everywhere
	require_JWTEqual(t, dirAA, bpub, bjwt2)           // assure that jwt got updated accordingly
	require_JWTEqual(t, dirAB, bpub, bjwt2)           // assure that jwt got updated accordingly
	require_JWTEqual(t, dirBA, apub, ajwt2)           // assure that jwt got updated accordingly
	require_JWTEqual(t, dirBB, apub, ajwt2)           // assure that jwt got updated accordingly
}

func newTimeRange(start time.Time, dur time.Duration) jwt.TimeRange {
	return jwt.TimeRange{Start: start.Format("15:04:05"), End: start.Add(dur).Format("15:04:05")}
}

func createUserWithLimit(t *testing.T, accKp nkeys.KeyPair, expiration time.Time, limits func(*jwt.UserPermissionLimits)) string {
	t.Helper()
	ukp, _ := nkeys.CreateUser()
	seed, _ := ukp.Seed()
	upub, _ := ukp.PublicKey()
	uclaim := newJWTTestUserClaims()
	uclaim.Subject = upub
	if limits != nil {
		limits(&uclaim.UserPermissionLimits)
	}
	if !expiration.IsZero() {
		uclaim.Expires = expiration.Unix()
	}
	vr := jwt.ValidationResults{}
	uclaim.Validate(&vr)
	require_Len(t, len(vr.Errors()), 0)
	ujwt, err := uclaim.Encode(accKp)
	require_NoError(t, err)
	return genCredsFile(t, ujwt, seed)
}

func TestJWTUserLimits(t *testing.T) {
	// helper for time
	inAnHour := time.Now().Add(time.Hour)
	inTwoHours := time.Now().Add(2 * time.Hour)
	doNotExpire := time.Now().AddDate(1, 0, 0)
	// create account
	kp, _ := nkeys.CreateAccount()
	aPub, _ := kp.PublicKey()
	claim := jwt.NewAccountClaims(aPub)
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)
	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
		}
    `, ojwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()
	for _, v := range []struct {
		pass bool
		f    func(*jwt.UserPermissionLimits)
	}{
		{true, nil},
		{false, func(j *jwt.UserPermissionLimits) { j.Src.Set("8.8.8.8/8") }},
		{true, func(j *jwt.UserPermissionLimits) { j.Src.Set("8.8.8.8/0") }},
		{true, func(j *jwt.UserPermissionLimits) { j.Src.Set("127.0.0.1/8") }},
		{true, func(j *jwt.UserPermissionLimits) { j.Src.Set("8.8.8.8/8,127.0.0.1/8") }},
		{false, func(j *jwt.UserPermissionLimits) { j.Src.Set("8.8.8.8/8,9.9.9.9/8") }},
		{true, func(j *jwt.UserPermissionLimits) { j.Times = append(j.Times, newTimeRange(time.Now(), time.Hour)) }},
		{false, func(j *jwt.UserPermissionLimits) {
			j.Times = append(j.Times, newTimeRange(time.Now().Add(time.Hour), time.Hour))
		}},
		{true, func(j *jwt.UserPermissionLimits) {
			j.Times = append(j.Times, newTimeRange(inAnHour, time.Hour), newTimeRange(time.Now(), time.Hour))
		}}, // last one is within range
		{false, func(j *jwt.UserPermissionLimits) {
			j.Times = append(j.Times, newTimeRange(inAnHour, time.Hour), newTimeRange(inTwoHours, time.Hour))
		}}, // out of range
		{false, func(j *jwt.UserPermissionLimits) {
			j.Times = append(j.Times, newTimeRange(inAnHour, 3*time.Hour), newTimeRange(inTwoHours, 2*time.Hour))
		}}, // overlapping [a[]b] out of range*/
		{false, func(j *jwt.UserPermissionLimits) {
			j.Times = append(j.Times, newTimeRange(inAnHour, 3*time.Hour), newTimeRange(inTwoHours, time.Hour))
		}}, // overlapping [a[b]] out of range
		// next day tests where end < begin
		{true, func(j *jwt.UserPermissionLimits) { j.Times = append(j.Times, newTimeRange(time.Now(), 25*time.Hour)) }},
		{true, func(j *jwt.UserPermissionLimits) { j.Times = append(j.Times, newTimeRange(time.Now(), -time.Hour)) }},
	} {
		t.Run("", func(t *testing.T) {
			creds := createUserWithLimit(t, kp, doNotExpire, v.f)
			if c, err := nats.Connect(sA.ClientURL(), nats.UserCredentials(creds)); err == nil {
				c.Close()
				if !v.pass {
					t.Fatalf("Expected failure got none")
				}
			} else if v.pass {
				t.Fatalf("Expected success got %v", err)
			} else if !strings.Contains(err.Error(), "Authorization Violation") {
				t.Fatalf("Expected error other than %v", err)
			}
		})
	}
}

func TestJWTTimeExpiration(t *testing.T) {
	validFor := 1500 * time.Millisecond
	validRange := 500 * time.Millisecond
	doNotExpire := time.Now().AddDate(1, 0, 0)
	// create account
	kp, _ := nkeys.CreateAccount()
	aPub, _ := kp.PublicKey()
	claim := jwt.NewAccountClaims(aPub)
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)
	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
		}
    `, ojwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()
	for _, l := range []string{"", "Europe/Berlin", "America/New_York"} {
		t.Run("simple expiration "+l, func(t *testing.T) {
			start := time.Now()
			creds := createUserWithLimit(t, kp, doNotExpire, func(j *jwt.UserPermissionLimits) {
				if l == _EMPTY_ {
					j.Times = []jwt.TimeRange{newTimeRange(start, validFor)}
				} else {
					loc, err := time.LoadLocation(l)
					require_NoError(t, err)
					j.Times = []jwt.TimeRange{newTimeRange(start.In(loc), validFor)}
					j.Locale = l
				}
			})
			disconnectChan := make(chan struct{})
			defer close(disconnectChan)
			errChan := make(chan struct{})
			defer close(errChan)
			c := natsConnect(t, sA.ClientURL(),
				nats.UserCredentials(creds),
				nats.DisconnectErrHandler(func(conn *nats.Conn, err error) {
					if err != io.EOF {
						return
					}
					disconnectChan <- struct{}{}
				}),
				nats.ErrorHandler(func(conn *nats.Conn, s *nats.Subscription, err error) {
					if err != nats.ErrAuthExpired {
						return
					}
					now := time.Now()
					stop := start.Add(validFor)
					// assure event happens within a second of stop
					if stop.Add(-validRange).Before(stop) && now.Before(stop.Add(validRange)) {
						errChan <- struct{}{}
					}
				}))
			defer c.Close()
			chanRecv(t, errChan, 10*time.Second)
			chanRecv(t, disconnectChan, 10*time.Second)
			require_True(t, c.IsReconnecting())
			require_False(t, c.IsConnected())
		})
	}
	t.Run("double expiration", func(t *testing.T) {
		start1 := time.Now()
		start2 := start1.Add(2 * validFor)
		creds := createUserWithLimit(t, kp, doNotExpire, func(j *jwt.UserPermissionLimits) {
			j.Times = []jwt.TimeRange{newTimeRange(start1, validFor), newTimeRange(start2, validFor)}
		})
		errChan := make(chan struct{})
		defer close(errChan)
		reConnectChan := make(chan struct{})
		defer close(reConnectChan)
		c := natsConnect(t, sA.ClientURL(),
			nats.UserCredentials(creds),
			nats.ReconnectHandler(func(conn *nats.Conn) {
				reConnectChan <- struct{}{}
			}),
			nats.ErrorHandler(func(conn *nats.Conn, s *nats.Subscription, err error) {
				if err != nats.ErrAuthExpired {
					return
				}
				now := time.Now()
				stop := start1.Add(validFor)
				// assure event happens within a second of stop
				if stop.Add(-validRange).Before(stop) && now.Before(stop.Add(validRange)) {
					errChan <- struct{}{}
					return
				}
				stop = start2.Add(validFor)
				// assure event happens within a second of stop
				if stop.Add(-validRange).Before(stop) && now.Before(stop.Add(validRange)) {
					errChan <- struct{}{}
				}
			}))
		defer c.Close()
		chanRecv(t, errChan, 10*time.Second)
		chanRecv(t, reConnectChan, 10*time.Second)
		require_False(t, c.IsReconnecting())
		require_True(t, c.IsConnected())
		chanRecv(t, errChan, 10*time.Second)
	})
	t.Run("lower jwt expiration overwrites time", func(t *testing.T) {
		start := time.Now()
		creds := createUserWithLimit(t, kp, start.Add(validFor), func(j *jwt.UserPermissionLimits) { j.Times = []jwt.TimeRange{newTimeRange(start, 2*validFor)} })
		disconnectChan := make(chan struct{})
		defer close(disconnectChan)
		errChan := make(chan struct{})
		defer close(errChan)
		c := natsConnect(t, sA.ClientURL(),
			nats.UserCredentials(creds),
			nats.DisconnectErrHandler(func(conn *nats.Conn, err error) {
				if err != io.EOF {
					return
				}
				disconnectChan <- struct{}{}
			}),
			nats.ErrorHandler(func(conn *nats.Conn, s *nats.Subscription, err error) {
				if err != nats.ErrAuthExpired {
					return
				}
				now := time.Now()
				stop := start.Add(validFor)
				// assure event happens within a second of stop
				if stop.Add(-validRange).Before(stop) && now.Before(stop.Add(validRange)) {
					errChan <- struct{}{}
				}
			}))
		defer c.Close()
		chanRecv(t, errChan, 10*time.Second)
		chanRecv(t, disconnectChan, 10*time.Second)
		require_True(t, c.IsReconnecting())
		require_False(t, c.IsConnected())
	})
}

func TestJWTValidateTimesAt(t *testing.T) {
	at := func(h, m, s int) time.Time {
		Y, M, D := time.Now().Date()
		return time.Date(Y, M, D, h, m, s, 0, time.UTC)
	}
	for _, tc := range []struct {
		name       string
		now        time.Time
		timeRanges []jwt.TimeRange
		allowed    bool
		remaining  time.Duration
	}{
		{
			name:       "inside window",
			now:        at(14, 30, 0),
			timeRanges: []jwt.TimeRange{{Start: "09:00:00", End: "17:00:00"}},
			allowed:    true,
			remaining:  2*time.Hour + 30*time.Minute,
		},
		{
			name:       "before window",
			now:        at(8, 0, 0),
			timeRanges: []jwt.TimeRange{{Start: "09:00:00", End: "17:00:00"}},
			allowed:    false,
			remaining:  time.Duration(0),
		},
		{
			name:       "after window",
			now:        at(18, 0, 0),
			timeRanges: []jwt.TimeRange{{Start: "09:00:00", End: "17:00:00"}},
			allowed:    false,
			remaining:  time.Duration(0),
		},
		{
			name:       "cross midnight inside window before midnight",
			now:        at(23, 30, 0),
			timeRanges: []jwt.TimeRange{{Start: "22:00:00", End: "06:00:00"}},
			allowed:    true,
			remaining:  6*time.Hour + 30*time.Minute,
		},
		{
			name:       "cross midnight inside window after midnight",
			now:        at(5, 0, 0),
			timeRanges: []jwt.TimeRange{{Start: "22:00:00", End: "06:00:00"}},
			allowed:    true,
			remaining:  1 * time.Hour,
		},
		{
			name:       "cross midnight before window",
			now:        at(21, 0, 0),
			timeRanges: []jwt.TimeRange{{Start: "22:00:00", End: "06:00:00"}},
			allowed:    false,
			remaining:  time.Duration(0),
		},
		{
			name:       "cross midnight after window",
			now:        at(7, 0, 0),
			timeRanges: []jwt.TimeRange{{Start: "22:00:00", End: "06:00:00"}},
			allowed:    false,
			remaining:  time.Duration(0),
		},
		{
			name: "overlap after midnight",
			now:  at(1, 0, 0),
			timeRanges: []jwt.TimeRange{
				{Start: "22:00:00", End: "06:00:00"},
				{Start: "00:00:00", End: "08:00:00"},
			},
			allowed:   true,
			remaining: 7 * time.Hour,
		},
		{
			name: "overlap after midnight reversed order",
			now:  at(1, 0, 0),
			timeRanges: []jwt.TimeRange{
				{Start: "00:00:00", End: "08:00:00"},
				{Start: "22:00:00", End: "06:00:00"},
			},
			allowed:   true,
			remaining: 7 * time.Hour,
		},
	} {
		t.Run(tc.name, func(t *testing.T) {
			claims := newJWTTestUserClaims()
			claims.Locale = "UTC"
			claims.Times = tc.timeRanges
			allowed, remaining := validateTimesAt(claims, tc.now)

			require_Equal(t, allowed, tc.allowed)
			require_Equal(t, remaining, tc.remaining)
		})
	}
}

func NewJwtAccountClaim(name string) (nkeys.KeyPair, string, *jwt.AccountClaims) {
	sysKp, _ := nkeys.CreateAccount()
	sysPub, _ := sysKp.PublicKey()
	claim := jwt.NewAccountClaims(sysPub)
	claim.Name = name
	return sysKp, sysPub, claim
}

func TestJWTSysImportForDifferentAccount(t *testing.T) {
	_, sysPub, sysClaim := NewJwtAccountClaim("SYS")
	sysClaim.Exports.Add(&jwt.Export{
		Type:    jwt.Service,
		Subject: "$SYS.REQ.ACCOUNT.*.INFO",
	})
	sysJwt, err := sysClaim.Encode(oKp)
	require_NoError(t, err)

	// create account
	aKp, aPub, claim := NewJwtAccountClaim("A")
	claim.Imports.Add(&jwt.Import{
		Type:         jwt.Service,
		Subject:      "$SYS.REQ.ACCOUNT.*.INFO",
		LocalSubject: "COMMON.ADVISORY.SYS.REQ.ACCOUNT.*.INFO",
		Account:      sysPub,
	})
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)

	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
			%s: %s
		}
    `, ojwt, sysPub, sysPub, sysJwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()

	nc := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, aKp))
	defer nc.Close()
	// user for account a requests for a different account, the system account
	m, err := nc.Request(fmt.Sprintf("COMMON.ADVISORY.SYS.REQ.ACCOUNT.%s.INFO", sysPub), nil, time.Second)
	require_NoError(t, err)
	resp := &ServerAPIResponse{}
	require_NoError(t, json.Unmarshal(m.Data, resp))
	require_True(t, resp.Error == nil)
}

func TestJWTSysImportFromNothing(t *testing.T) {
	_, sysPub, sysClaim := NewJwtAccountClaim("SYS")
	sysJwt, err := sysClaim.Encode(oKp)
	require_NoError(t, err)

	// create account
	aKp, aPub, claim := NewJwtAccountClaim("A")
	claim.Imports.Add(&jwt.Import{
		Type: jwt.Service,
		// fails as it's not for own account, but system account
		Subject:      jwt.Subject(fmt.Sprintf("$SYS.REQ.ACCOUNT.%s.CONNZ", sysPub)),
		LocalSubject: "fail1",
		Account:      sysPub,
	})
	claim.Imports.Add(&jwt.Import{
		Type: jwt.Service,
		// fails as it's not for own account but all accounts
		Subject:      "$SYS.REQ.ACCOUNT.*.CONNZ",
		LocalSubject: "fail2.*",
		Account:      sysPub,
	})
	claim.Imports.Add(&jwt.Import{
		Type:         jwt.Service,
		Subject:      jwt.Subject(fmt.Sprintf("$SYS.REQ.ACCOUNT.%s.CONNZ", aPub)),
		LocalSubject: "pass",
		Account:      sysPub,
	})
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)

	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
			%s: %s
		}
    `, ojwt, sysPub, sysPub, sysJwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()

	nc := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, aKp))
	defer nc.Close()
	// user for account a requests for a different account, the system account
	_, err = nc.Request("pass", nil, time.Second)
	require_NoError(t, err)
	// default import
	_, err = nc.Request("$SYS.REQ.ACCOUNT.PING.CONNZ", nil, time.Second)
	require_NoError(t, err)
	_, err = nc.Request("fail1", nil, time.Second)
	require_Error(t, err)
	require_Contains(t, err.Error(), "no responders")
	// fails even for own account, as the import itself is bad
	_, err = nc.Request("fail2."+aPub, nil, time.Second)
	require_Error(t, err)
	require_Contains(t, err.Error(), "no responders")
}

func TestJWTSysImportOverwritePublic(t *testing.T) {
	_, sysPub, sysClaim := NewJwtAccountClaim("SYS")
	// this changes the export permissions to allow for requests for every account
	sysClaim.Exports.Add(&jwt.Export{
		Type:    jwt.Service,
		Subject: "$SYS.REQ.ACCOUNT.*.>",
	})
	sysJwt, err := sysClaim.Encode(oKp)
	require_NoError(t, err)

	// create account
	aKp, aPub, claim := NewJwtAccountClaim("A")
	claim.Imports.Add(&jwt.Import{
		Type:         jwt.Service,
		Subject:      jwt.Subject(fmt.Sprintf("$SYS.REQ.ACCOUNT.%s.CONNZ", sysPub)),
		LocalSubject: "pass1",
		Account:      sysPub,
	})
	claim.Imports.Add(&jwt.Import{
		Type:         jwt.Service,
		Subject:      jwt.Subject(fmt.Sprintf("$SYS.REQ.ACCOUNT.%s.CONNZ", aPub)),
		LocalSubject: "pass2",
		Account:      sysPub,
	})
	claim.Imports.Add(&jwt.Import{
		Type:         jwt.Service,
		Subject:      "$SYS.REQ.ACCOUNT.*.CONNZ",
		LocalSubject: "pass3.*",
		Account:      sysPub,
	})
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)

	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
			%s: %s
		}
    `, ojwt, sysPub, sysPub, sysJwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()

	nc := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, aKp))
	defer nc.Close()
	// user for account a requests for a different account, the system account
	_, err = nc.Request("pass1", nil, time.Second)
	require_NoError(t, err)
	_, err = nc.Request("pass2", nil, time.Second)
	require_NoError(t, err)
	_, err = nc.Request("pass3."+sysPub, nil, time.Second)
	require_NoError(t, err)
	_, err = nc.Request("pass3."+aPub, nil, time.Second)
	require_NoError(t, err)
	_, err = nc.Request("pass3.PING", nil, time.Second)
	require_NoError(t, err)
}

func TestJWTSysImportOverwriteToken(t *testing.T) {
	_, sysPub, sysClaim := NewJwtAccountClaim("SYS")
	// this changes the export permissions in a way that the internal imports can't satisfy
	sysClaim.Exports.Add(&jwt.Export{
		Type:     jwt.Service,
		Subject:  "$SYS.REQ.>",
		TokenReq: true,
	})

	sysJwt, err := sysClaim.Encode(oKp)
	require_NoError(t, err)

	// create account
	aKp, aPub, claim := NewJwtAccountClaim("A")
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)

	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
			%s: %s
		}
    `, ojwt, sysPub, sysPub, sysJwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()

	nc := natsConnect(t, sA.ClientURL(), createUserCreds(t, nil, aKp))
	defer nc.Close()
	// make sure the internal import still got added
	_, err = nc.Request("$SYS.REQ.ACCOUNT.PING.CONNZ", nil, time.Second)
	require_NoError(t, err)
}

func TestJWTLimits(t *testing.T) {
	doNotExpire := time.Now().AddDate(1, 0, 0)
	// create account
	kp, _ := nkeys.CreateAccount()
	aPub, _ := kp.PublicKey()
	claim := jwt.NewAccountClaims(aPub)
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)
	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
		}
    `, ojwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()
	errChan := make(chan struct{})
	defer close(errChan)
	t.Run("subs", func(t *testing.T) {
		creds := createUserWithLimit(t, kp, doNotExpire, func(j *jwt.UserPermissionLimits) { j.Subs = 1 })
		c := natsConnect(t, sA.ClientURL(), nats.UserCredentials(creds),
			nats.ErrorHandler(func(conn *nats.Conn, s *nats.Subscription, err error) {
				if e := conn.LastError(); e != nil && strings.Contains(e.Error(), "maximum subscriptions exceeded") {
					errChan <- struct{}{}
				}
			}),
		)
		defer c.Close()
		if _, err := c.Subscribe("foo", func(msg *nats.Msg) {}); err != nil {
			t.Fatalf("couldn't subscribe: %v", err)
		}
		if _, err = c.Subscribe("bar", func(msg *nats.Msg) {}); err != nil {
			t.Fatalf("expected error got: %v", err)
		}
		chanRecv(t, errChan, time.Second)
	})
	t.Run("payload", func(t *testing.T) {
		creds := createUserWithLimit(t, kp, doNotExpire, func(j *jwt.UserPermissionLimits) { j.Payload = 5 })
		c := natsConnect(t, sA.ClientURL(), nats.UserCredentials(creds))
		defer c.Close()
		if err := c.Flush(); err != nil {
			t.Fatalf("flush failed %v", err)
		}
		if err := c.Publish("foo", []byte("world")); err != nil {
			t.Fatalf("couldn't publish: %v", err)
		}
		if err := c.Publish("foo", []byte("worldX")); err != nats.ErrMaxPayload {
			t.Fatalf("couldn't publish: %v", err)
		}
	})
}

func TestJWTTemplates(t *testing.T) {
	kp, _ := nkeys.CreateAccount()
	aPub, _ := kp.PublicKey()
	ukp, _ := nkeys.CreateUser()
	upub, _ := ukp.PublicKey()
	uclaim := newJWTTestUserClaims()
	uclaim.Name = "myname"
	uclaim.Subject = upub
	uclaim.SetScoped(true)
	uclaim.IssuerAccount = aPub
	uclaim.Tags.Add("foo:foo1")
	uclaim.Tags.Add("foo:foo2")
	uclaim.Tags.Add("bar:bar1")
	uclaim.Tags.Add("bar:bar2")
	uclaim.Tags.Add("bar:bar3")

	lim := jwt.UserPermissionLimits{}
	lim.Pub.Allow.Add("{{tag(foo)}}.none.{{tag(bar)}}")
	lim.Pub.Deny.Add("{{tag(foo)}}.{{account-tag(acc)}}")
	lim.Sub.Allow.Add("{{tag(NOT_THERE)}}") // expect to not emit this
	lim.Sub.Deny.Add("foo.{{name()}}.{{subject()}}.{{account-name()}}.{{account-subject()}}.bar")
	acc := &Account{nameTag: "accname", tags: []string{"acc:acc1", "acc:acc2"}}

	resLim, err := processUserPermissionsTemplate(lim, uclaim, acc)
	require_NoError(t, err)

	test := func(expectedSubjects []string, res jwt.StringList) {
		t.Helper()
		require_True(t, len(res) == len(expectedSubjects))
		for _, expetedSubj := range expectedSubjects {
			require_True(t, res.Contains(expetedSubj))
		}
	}

	test(resLim.Pub.Allow, []string{"foo1.none.bar1", "foo1.none.bar2", "foo1.none.bar3",
		"foo2.none.bar1", "foo2.none.bar2", "foo2.none.bar3"})

	test(resLim.Pub.Deny, []string{"foo1.acc1", "foo1.acc2", "foo2.acc1", "foo2.acc2"})

	require_True(t, len(resLim.Sub.Allow) == 0)
	require_True(t, len(resLim.Sub.Deny) == 2)
	require_Contains(t, resLim.Sub.Deny[0], fmt.Sprintf("foo.myname.%s.accname.%s.bar", upub, aPub))
	// added in to compensate for sub allow not resolving
	require_Contains(t, resLim.Sub.Deny[1], ">")

	lim.Pub.Deny.Add("{{tag(NOT_THERE)}}")
	_, err = processUserPermissionsTemplate(lim, uclaim, acc)
	require_Error(t, err)
	require_Contains(t, err.Error(), "generated invalid subject")
}

func TestJWTInLineTemplates(t *testing.T) {
	kp, _ := nkeys.CreateAccount()
	aPub, _ := kp.PublicKey()
	ukp, _ := nkeys.CreateUser()
	upub, _ := ukp.PublicKey()
	uclaim := newJWTTestUserClaims()
	uclaim.Name = "myname"
	uclaim.Subject = upub
	uclaim.SetScoped(true)
	uclaim.IssuerAccount = aPub
	uclaim.Tags.Add("bucket:a")

	lim := jwt.UserPermissionLimits{}
	lim.Pub.Allow.Add("$JS.API.STREAM.INFO.KV_{{tag(bucket)}}")
	acc := &Account{nameTag: "accname", tags: []string{"acc:acc1", "acc:acc2"}}

	resLim, err := processUserPermissionsTemplate(lim, uclaim, acc)
	require_NoError(t, err)

	test := func(expectedSubjects []string, res jwt.StringList) {
		t.Helper()
		require_True(t, len(res) == len(expectedSubjects))
		for _, expetedSubj := range expectedSubjects {
			require_True(t, res.Contains(expetedSubj))
		}
	}

	test(resLim.Pub.Allow, []string{"$JS.API.STREAM.INFO.KV_a"})
}

func TestJWTTemplateGoodTagAfterBadTag(t *testing.T) {
	kp, _ := nkeys.CreateAccount()
	aPub, _ := kp.PublicKey()
	ukp, _ := nkeys.CreateUser()
	upub, _ := ukp.PublicKey()
	uclaim := newJWTTestUserClaims()
	uclaim.Name = "myname"
	uclaim.Subject = upub
	uclaim.SetScoped(true)
	uclaim.IssuerAccount = aPub
	uclaim.Tags.Add("foo:foo1")

	lim := jwt.UserPermissionLimits{}
	lim.Pub.Deny.Add("{{tag(NOT_THERE)}}.{{tag(foo)}}")
	acc := &Account{nameTag: "accname", tags: []string{"acc:acc1", "acc:acc2"}}

	_, err := processUserPermissionsTemplate(lim, uclaim, acc)
	require_Error(t, err)
	require_Contains(t, err.Error(), "generated invalid subject")
}

func TestJWTLimitsTemplate(t *testing.T) {
	kp, _ := nkeys.CreateAccount()
	aPub, _ := kp.PublicKey()
	claim := jwt.NewAccountClaims(aPub)
	aSignScopedKp, aSignScopedPub := createKey(t)
	signer := jwt.NewUserScope()
	signer.Key = aSignScopedPub
	signer.Template.Pub.Deny.Add("denied")
	signer.Template.Pub.Allow.Add("foo.{{name()}}")
	signer.Template.Sub.Allow.Add("foo.{{name()}}")
	claim.SigningKeys.AddScopedSigner(signer)
	aJwt, err := claim.Encode(oKp)
	require_NoError(t, err)
	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		resolver: MEM
		resolver_preload: {
			%s: %s
		}
    `, ojwt, aPub, aJwt)))
	sA, _ := RunServerWithConfig(conf)
	defer sA.Shutdown()
	errChan := make(chan struct{})
	defer close(errChan)

	ukp, _ := nkeys.CreateUser()
	seed, _ := ukp.Seed()
	upub, _ := ukp.PublicKey()
	uclaim := newJWTTestUserClaims()
	uclaim.Name = "myname"
	uclaim.Subject = upub
	uclaim.SetScoped(true)
	uclaim.IssuerAccount = aPub

	ujwt, err := uclaim.Encode(aSignScopedKp)
	require_NoError(t, err)
	creds := genCredsFile(t, ujwt, seed)

	t.Run("pass", func(t *testing.T) {
		c := natsConnect(t, sA.ClientURL(), nats.UserCredentials(creds))
		defer c.Close()
		sub, err := c.SubscribeSync("foo.myname")
		require_NoError(t, err)
		require_NoError(t, c.Flush())
		require_NoError(t, c.Publish("foo.myname", nil))
		_, err = sub.NextMsg(time.Second)
		require_NoError(t, err)
	})
	t.Run("fail", func(t *testing.T) {
		c := natsConnect(t, sA.ClientURL(), nats.UserCredentials(creds),
			nats.ErrorHandler(func(_ *nats.Conn, _ *nats.Subscription, err error) {
				if strings.Contains(err.Error(), `Permissions Violation for Publish to "foo.othername"`) {
					errChan <- struct{}{}
				}
			}))
		defer c.Close()
		require_NoError(t, c.Publish("foo.othername", nil))
		select {
		case <-errChan:
		case <-time.After(time.Second * 2):
			require_True(t, false)
		}
	})
}

func TestJWTNoOperatorMode(t *testing.T) {
	for _, login := range []bool{true, false} {
		t.Run("", func(t *testing.T) {
			opts := DefaultOptions()
			if login {
				opts.Users = append(opts.Users, &User{Username: "u", Password: "pwd"})
			}
			sA := RunServer(opts)
			defer sA.Shutdown()
			kp, _ := nkeys.CreateAccount()
			creds := createUserWithLimit(t, kp, time.Now().Add(time.Hour), nil)
			url := sA.ClientURL()
			if login {
				url = fmt.Sprintf("nats://u:pwd@%s:%d", sA.opts.Host, sA.opts.Port)
			}
			c := natsConnect(t, url, nats.UserCredentials(creds))
			defer c.Close()
			sA.mu.Lock()
			defer sA.mu.Unlock()
			if len(sA.clients) != 1 {
				t.Fatalf("Expected exactly one client")
			}
			for _, v := range sA.clients {
				if v.opts.JWT != "" {
					t.Fatalf("Expected no jwt %v", v.opts.JWT)
				}
			}
		})
	}
}

func TestJWTUserRevocation(t *testing.T) {
	test := func(all bool) {
		createAccountAndUser := func(done chan struct{}, pubKey, jwt1, jwt2, creds1, creds2 *string) {
			t.Helper()
			kp, _ := nkeys.CreateAccount()
			*pubKey, _ = kp.PublicKey()
			claim := jwt.NewAccountClaims(*pubKey)
			var err error
			*jwt1, err = claim.Encode(oKp)
			require_NoError(t, err)

			ukp, _ := nkeys.CreateUser()
			seed, _ := ukp.Seed()
			upub, _ := ukp.PublicKey()
			uclaim := newJWTTestUserClaims()
			uclaim.Subject = upub

			ujwt1, err := uclaim.Encode(kp)
			require_NoError(t, err)
			*creds1 = genCredsFile(t, ujwt1, seed)

			// create updated claim need to assure that issue time differs
			if all {
				claim.Revoke(jwt.All) // revokes all jwt from now on
			} else {
				claim.Revoke(upub) // revokes this jwt from now on
			}
			time.Sleep(time.Millisecond * 1100)
			*jwt2, err = claim.Encode(oKp)
			require_NoError(t, err)

			ujwt2, err := uclaim.Encode(kp)
			require_NoError(t, err)
			*creds2 = genCredsFile(t, ujwt2, seed)

			done <- struct{}{}
		}
		// Create Accounts and corresponding revoked and non revoked user creds. Do so concurrently to speed up the test
		doneChan := make(chan struct{}, 2)
		defer close(doneChan)
		var syspub, sysjwt, dummy1, sysCreds, dummyCreds string
		go createAccountAndUser(doneChan, &syspub, &sysjwt, &dummy1, &sysCreds, &dummyCreds)
		var apub, ajwt1, ajwt2, aCreds1, aCreds2 string
		go createAccountAndUser(doneChan, &apub, &ajwt1, &ajwt2, &aCreds1, &aCreds2)
		for i := 0; i < cap(doneChan); i++ {
			<-doneChan
		}
		dirSrv := t.TempDir()
		conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
    `, ojwt, syspub, dirSrv)))
		srv, _ := RunServerWithConfig(conf)
		defer srv.Shutdown()
		updateJwt(t, srv.ClientURL(), sysCreds, sysjwt, 1) // update system account jwt
		updateJwt(t, srv.ClientURL(), sysCreds, ajwt1, 1)  // set account jwt without revocation
		ncSys := natsConnect(t, srv.ClientURL(), nats.UserCredentials(sysCreds), nats.Name("conn name"))
		defer ncSys.Close()
		ncChan := make(chan *nats.Msg, 10)
		defer close(ncChan)
		sub, _ := ncSys.ChanSubscribe(fmt.Sprintf(disconnectEventSubj, apub), ncChan) // observe disconnect message
		defer sub.Unsubscribe()
		// use credentials that will be revoked ans assure that the connection will be disconnected
		nc := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aCreds1),
			nats.ErrorHandler(func(_ *nats.Conn, _ *nats.Subscription, err error) {
				if err != nil && strings.Contains(err.Error(), "authentication revoked") {
					doneChan <- struct{}{}
				}
			}),
		)
		defer nc.Close()
		// update account jwt to contain revocation
		if updateJwt(t, srv.ClientURL(), sysCreds, ajwt2, 1) != 1 {
			t.Fatalf("Expected jwt update to pass")
		}
		// assure that nc got disconnected due to the revocation
		select {
		case <-doneChan:
		case <-time.After(time.Second):
			t.Fatalf("Expected connection to have failed")
		}
		m := <-ncChan
		require_Len(t, strings.Count(string(m.Data), apub), 3)
		require_True(t, strings.Contains(string(m.Data), `"jwt":"eyJ0`))
		// try again with old credentials. Expected to fail
		if nc1, err := nats.Connect(srv.ClientURL(), nats.UserCredentials(aCreds1)); err == nil {
			nc1.Close()
			t.Fatalf("Expected revoked credentials to fail")
		}
		// Assure new creds pass
		nc2 := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aCreds2))
		defer nc2.Close()
	}
	t.Run("specific-key", func(t *testing.T) {
		test(false)
	})
	t.Run("all-key", func(t *testing.T) {
		test(true)
	})
}

func TestJWTActivationRevocation(t *testing.T) {
	test := func(all bool) {
		sysKp, syspub := createKey(t)
		sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
		sysCreds := newUser(t, sysKp)

		aExpKp, aExpPub := createKey(t)
		aExpClaim := jwt.NewAccountClaims(aExpPub)
		aExpClaim.Name = "Export"
		aExpClaim.Exports.Add(&jwt.Export{
			Subject:  "foo",
			Type:     jwt.Stream,
			TokenReq: true,
		})
		aExp1Jwt := encodeClaim(t, aExpClaim, aExpPub)
		aExpCreds := newUser(t, aExpKp)

		aImpKp, aImpPub := createKey(t)

		ac := &jwt.ActivationClaims{}
		ac.Subject = aImpPub
		ac.ImportSubject = "foo"
		ac.ImportType = jwt.Stream
		token, err := ac.Encode(aExpKp)
		require_NoError(t, err)

		revPubKey := aImpPub
		if all {
			revPubKey = jwt.All
		}

		aExpClaim.Exports[0].RevokeAt(revPubKey, time.Now())
		aExp2Jwt := encodeClaim(t, aExpClaim, aExpPub)

		aExpClaim.Exports[0].ClearRevocation(revPubKey)
		aExp3Jwt := encodeClaim(t, aExpClaim, aExpPub)

		aImpClaim := jwt.NewAccountClaims(aImpPub)
		aImpClaim.Name = "Import"
		aImpClaim.Imports.Add(&jwt.Import{
			Subject: "foo",
			Type:    jwt.Stream,
			Account: aExpPub,
			Token:   token,
		})
		aImpJwt := encodeClaim(t, aImpClaim, aImpPub)
		aImpCreds := newUser(t, aImpKp)

		dirSrv := t.TempDir()
		conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
    `, ojwt, syspub, dirSrv)))

		t.Run("token-expired-on-connect", func(t *testing.T) {
			srv, _ := RunServerWithConfig(conf)
			defer srv.Shutdown()
			defer removeDir(t, dirSrv) // clean jwt directory

			updateJwt(t, srv.ClientURL(), sysCreds, sysJwt, 1)   // update system account jwt
			updateJwt(t, srv.ClientURL(), sysCreds, aExp2Jwt, 1) // set account jwt without revocation
			updateJwt(t, srv.ClientURL(), sysCreds, aImpJwt, 1)

			ncExp1 := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aExpCreds))
			defer ncExp1.Close()

			ncImp := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aImpCreds))
			defer ncImp.Close()

			sub, err := ncImp.SubscribeSync("foo")
			require_NoError(t, err)
			require_NoError(t, ncImp.Flush())
			require_NoError(t, ncExp1.Publish("foo", []byte("1")))
			_, err = sub.NextMsg(time.Second)
			require_Error(t, err)
			require_Equal(t, err.Error(), "nats: timeout")
		})

		t.Run("token-expired-on-update", func(t *testing.T) {
			srv, _ := RunServerWithConfig(conf)
			defer srv.Shutdown()
			defer removeDir(t, dirSrv) // clean jwt directory

			updateJwt(t, srv.ClientURL(), sysCreds, sysJwt, 1)   // update system account jwt
			updateJwt(t, srv.ClientURL(), sysCreds, aExp1Jwt, 1) // set account jwt without revocation
			updateJwt(t, srv.ClientURL(), sysCreds, aImpJwt, 1)

			ncExp1 := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aExpCreds))
			defer ncExp1.Close()

			ncImp := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aImpCreds))
			defer ncImp.Close()

			sub, err := ncImp.SubscribeSync("foo")
			require_NoError(t, err)
			require_NoError(t, ncImp.Flush())
			require_NoError(t, ncExp1.Publish("foo", []byte("1")))
			m1, err := sub.NextMsg(time.Second)
			require_NoError(t, err)
			require_Equal(t, string(m1.Data), "1")

			updateJwt(t, srv.ClientURL(), sysCreds, aExp2Jwt, 1) // set account jwt with revocation

			require_NoError(t, ncExp1.Publish("foo", []byte("2")))
			_, err = sub.NextMsg(time.Second)
			require_Error(t, err)
			require_Equal(t, err.Error(), "nats: timeout")

			updateJwt(t, srv.ClientURL(), sysCreds, aExp3Jwt, 1) // set account with revocation cleared

			require_NoError(t, ncExp1.Publish("foo", []byte("3")))
			m2, err := sub.NextMsg(time.Second)
			require_NoError(t, err)
			require_Equal(t, string(m2.Data), "3")
		})
	}
	t.Run("specific-key", func(t *testing.T) {
		test(false)
	})
	t.Run("all-key", func(t *testing.T) {
		test(true)
	})
}

func TestJWTAccountFetchTimeout(t *testing.T) {
	createAccountAndUser := func(pubKey, jwt1, creds1 *string) {
		t.Helper()
		kp, _ := nkeys.CreateAccount()
		*pubKey, _ = kp.PublicKey()
		claim := jwt.NewAccountClaims(*pubKey)
		var err error
		*jwt1, err = claim.Encode(oKp)
		require_NoError(t, err)
		ukp, _ := nkeys.CreateUser()
		seed, _ := ukp.Seed()
		upub, _ := ukp.PublicKey()
		uclaim := newJWTTestUserClaims()
		uclaim.Subject = upub
		ujwt1, err := uclaim.Encode(kp)
		require_NoError(t, err)
		*creds1 = genCredsFile(t, ujwt1, seed)
	}
	for _, cfg := range []string{
		`type: full`,
		`type: cache`,
	} {
		t.Run("", func(t *testing.T) {
			var syspub, sysjwt, sysCreds string
			createAccountAndUser(&syspub, &sysjwt, &sysCreds)
			var apub, ajwt1, aCreds1 string
			createAccountAndUser(&apub, &ajwt1, &aCreds1)
			dirSrv := t.TempDir()
			conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			%s
			timeout: "100ms"
			dir: '%s'
		}
    `, ojwt, syspub, cfg, dirSrv)))
			srv, _ := RunServerWithConfig(conf)
			defer srv.Shutdown()
			updateJwt(t, srv.ClientURL(), sysCreds, sysjwt, 1) // update system account jwt
			start := time.Now()
			nc, err := nats.Connect(srv.ClientURL(), nats.UserCredentials(aCreds1))
			if err == nil {
				t.Fatal("expected an error, got none")
			} else if !strings.Contains(err.Error(), "Authorization Violation") {
				t.Fatalf("expected an authorization violation, got: %v", err)
			}
			if time.Since(start) > 300*time.Millisecond {
				t.Fatal("expected timeout earlier")
			}
			defer nc.Close()
		})
	}
}

func TestJWTAccountOps(t *testing.T) {
	op, _ := nkeys.CreateOperator()
	opPk, _ := op.PublicKey()
	sk, _ := nkeys.CreateOperator()
	skPk, _ := sk.PublicKey()
	opClaim := jwt.NewOperatorClaims(opPk)
	opClaim.SigningKeys.Add(skPk)
	opJwt, err := opClaim.Encode(op)
	require_NoError(t, err)
	createAccountAndUser := func(pubKey, jwt1, creds1 *string) {
		t.Helper()
		kp, _ := nkeys.CreateAccount()
		*pubKey, _ = kp.PublicKey()
		claim := jwt.NewAccountClaims(*pubKey)
		var err error
		*jwt1, err = claim.Encode(sk)
		require_NoError(t, err)

		ukp, _ := nkeys.CreateUser()
		seed, _ := ukp.Seed()
		upub, _ := ukp.PublicKey()
		uclaim := newJWTTestUserClaims()
		uclaim.Subject = upub

		ujwt1, err := uclaim.Encode(kp)
		require_NoError(t, err)
		*creds1 = genCredsFile(t, ujwt1, seed)
	}
	generateRequest := func(accs []string, kp nkeys.KeyPair) []byte {
		t.Helper()
		opk, _ := kp.PublicKey()
		c := jwt.NewGenericClaims(opk)
		c.Data["accounts"] = accs
		cJwt, err := c.Encode(kp)
		if err != nil {
			t.Fatalf("Expected no error %v", err)
		}
		return []byte(cJwt)
	}
	for _, cfg := range []string{
		`type: full
 		allow_delete: true`,
		`type: cache`,
	} {
		t.Run("", func(t *testing.T) {
			var syspub, sysjwt, sysCreds string
			createAccountAndUser(&syspub, &sysjwt, &sysCreds)
			var apub, ajwt1, aCreds1 string
			createAccountAndUser(&apub, &ajwt1, &aCreds1)
			dirSrv := t.TempDir()
			conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			%s
			dir: '%s'
		}
    `, opJwt, syspub, cfg, dirSrv)))
			disconnectErrChan := make(chan struct{}, 1)
			defer close(disconnectErrChan)
			srv, _ := RunServerWithConfig(conf)
			defer srv.Shutdown()
			updateJwt(t, srv.ClientURL(), sysCreds, sysjwt, 1) // update system account jwt
			// push jwt (for full resolver)
			updateJwt(t, srv.ClientURL(), sysCreds, ajwt1, 1) // set jwt
			nc := natsConnect(t, srv.ClientURL(), nats.UserCredentials(sysCreds))
			defer nc.Close()
			// simulate nas resolver in case of a lookup request (cache)
			nc.Subscribe(fmt.Sprintf(accLookupReqSubj, apub), func(msg *nats.Msg) {
				msg.Respond([]byte(ajwt1))
			})
			// connect so there is a reason to cache the request and so disconnect can be observed
			ncA := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aCreds1), nats.NoReconnect(),
				nats.ErrorHandler(func(_ *nats.Conn, _ *nats.Subscription, err error) {
					if err != nil && strings.Contains(err.Error(), "account authentication expired") {
						disconnectErrChan <- struct{}{}
					}
				}))
			defer ncA.Close()
			resp, err := nc.Request(accListReqSubj, nil, time.Second)
			require_NoError(t, err)
			require_True(t, strings.Contains(string(resp.Data), apub))
			require_True(t, strings.Contains(string(resp.Data), syspub))
			// delete nothing
			resp, err = nc.Request(accDeleteReqSubj, generateRequest([]string{}, op), time.Second)
			require_NoError(t, err)
			require_True(t, strings.Contains(string(resp.Data), `"message":"deleted 0 accounts"`))
			// issue delete, twice to also delete a non existing account
			// also switch which key used to sign the request
			for i := 0; i < 2; i++ {
				resp, err = nc.Request(accDeleteReqSubj, generateRequest([]string{apub}, sk), time.Second)
				require_NoError(t, err)
				require_True(t, strings.Contains(string(resp.Data), `"message":"deleted 1 accounts"`))
				resp, err = nc.Request(accListReqSubj, nil, time.Second)
				require_False(t, strings.Contains(string(resp.Data), apub))
				require_True(t, strings.Contains(string(resp.Data), syspub))
				require_NoError(t, err)
				if i > 0 {
					continue
				}
				select {
				case <-disconnectErrChan:
				case <-time.After(time.Second):
					t.Fatal("Callback not executed")
				}
			}
		})
	}
}

func createKey(t *testing.T) (nkeys.KeyPair, string) {
	t.Helper()
	kp, _ := nkeys.CreateAccount()
	syspub, _ := kp.PublicKey()
	return kp, syspub
}

func encodeClaim(t *testing.T, claim *jwt.AccountClaims, _ string) string {
	t.Helper()
	theJWT, err := claim.Encode(oKp)
	require_NoError(t, err)
	return theJWT
}

// returns user creds
func newUserEx(t *testing.T, accKp nkeys.KeyPair, scoped bool, issuerAccount string) string {
	ukp, _ := nkeys.CreateUser()
	seed, _ := ukp.Seed()
	upub, _ := ukp.PublicKey()
	uclaim := newJWTTestUserClaims()
	uclaim.Subject = upub
	uclaim.SetScoped(scoped)
	if issuerAccount != _EMPTY_ {
		uclaim.IssuerAccount = issuerAccount
	}
	ujwt, err := uclaim.Encode(accKp)
	require_NoError(t, err)
	return genCredsFile(t, ujwt, seed)
}

// returns user creds
func newUser(t *testing.T, accKp nkeys.KeyPair) string {
	return newUserEx(t, accKp, false, "")
}

func TestJWTHeader(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	test := func(share bool) {
		aExpKp, aExpPub := createKey(t)
		aExpClaim := jwt.NewAccountClaims(aExpPub)
		aExpClaim.Exports.Add(&jwt.Export{
			Name:     "test",
			Subject:  "srvc",
			Type:     jwt.Service,
			TokenReq: false,
			Latency: &jwt.ServiceLatency{
				Sampling: jwt.Headers,
				Results:  "res",
			},
		})
		aExpJwt := encodeClaim(t, aExpClaim, aExpPub)
		aExpCreds := newUser(t, aExpKp)

		aImpKp, aImpPub := createKey(t)
		aImpClaim := jwt.NewAccountClaims(aImpPub)
		aImpClaim.Imports.Add(&jwt.Import{
			Name:    "test",
			Subject: "srvc",
			Account: aExpPub,
			Type:    jwt.Service,
			Share:   share,
		})
		aImpJwt := encodeClaim(t, aImpClaim, aImpPub)
		aImpCreds := newUser(t, aImpKp)

		dirSrv := t.TempDir()
		conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
    `, ojwt, syspub, dirSrv)))
		srv, _ := RunServerWithConfig(conf)
		defer srv.Shutdown()
		updateJwt(t, srv.ClientURL(), sysCreds, sysJwt, 1) // update system account jwt
		updateJwt(t, srv.ClientURL(), sysCreds, aExpJwt, 1)
		updateJwt(t, srv.ClientURL(), sysCreds, aImpJwt, 1)

		expNc := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aExpCreds))
		defer expNc.Close()
		resChan := make(chan *nats.Msg, 1)
		expNc.ChanSubscribe("res", resChan)
		sub, err := expNc.Subscribe("srvc", func(msg *nats.Msg) {
			msg.Respond(nil)
		})
		require_NoError(t, err)
		defer sub.Unsubscribe()

		impNc := natsConnect(t, srv.ClientURL(), nats.UserCredentials(aImpCreds))
		defer impNc.Close()
		// send request w/o header
		_, err = impNc.Request("srvc", []byte("msg1"), time.Second)
		require_NoError(t, err)
		require_True(t, len(resChan) == 0)

		_, err = impNc.RequestMsg(&nats.Msg{
			Subject: "srvc", Data: []byte("msg2"), Header: nats.Header{
				"X-B3-Sampled": []string{"1"},
				"Share":        []string{"Me"}}}, time.Second)
		require_NoError(t, err)
		select {
		case <-time.After(time.Second):
			t.Fatalf("should have received a response")
		case m := <-resChan:
			obj := map[string]any{}
			err = json.Unmarshal(m.Data, &obj)
			require_NoError(t, err)
			// test if shared is honored
			reqInfo := obj["requestor"].(map[string]any)
			// fields always set
			require_True(t, reqInfo["acc"] != nil)
			require_True(t, reqInfo["rtt"] != nil)

			// fields only set when shared
			_, ok1 := reqInfo["lang"]
			_, ok2 := reqInfo["ver"]
			_, ok3 := reqInfo["host"]
			_, ok4 := reqInfo["start"]
			if !share {
				ok1 = !ok1
				ok2 = !ok2
				ok3 = !ok3
				ok4 = !ok4
			}
			require_True(t, ok1)
			require_True(t, ok2)
			require_True(t, ok3)
			require_True(t, ok4)

		}
		require_True(t, len(resChan) == 0)
	}
	test(true)
	test(false)
}

func TestJWTAccountImportsWithWildcardSupport(t *testing.T) {
	test := func(aExpPub, aExpJwt, aExpCreds, aImpPub, aImpJwt, aImpCreds string, jsEnabled bool, exSubExpect, exPub, imReq, imSubExpect string) {
		t.Helper()

		var jsSetting string
		if jsEnabled {
			jsSetting = "jetstream: {max_mem_store: 10Mb, max_file_store: 10Mb}"
		}

		_, aSysPub := createKey(t)
		aSysClaim := jwt.NewAccountClaims(aSysPub)
		aSysJwt := encodeClaim(t, aSysClaim, aSysPub)
		cf := createConfFile(t, []byte(fmt.Sprintf(`
		port: -1
		operator = %s
		resolver = MEMORY
		resolver_preload = {
			%s : "%s"
			%s : "%s"
			%s : "%s"
		}
		system_account: %s
		%s
		`, ojwt, aExpPub, aExpJwt, aImpPub, aImpJwt, aSysPub, aSysJwt, aSysPub, jsSetting)))

		s, opts := RunServerWithConfig(cf)
		defer s.Shutdown()

		ncExp := natsConnect(t, fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port), nats.UserCredentials(aExpCreds))
		defer ncExp.Close()

		ncImp := natsConnect(t, fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port), nats.UserCredentials(aImpCreds))
		defer ncImp.Close()

		// Create subscriber for the service endpoint in foo.
		_, err := ncExp.Subscribe(exSubExpect, func(m *nats.Msg) {
			m.Respond([]byte("yes!"))
		})
		require_NoError(t, err)
		ncExp.Flush()

		// Now test service import.
		if resp, err := ncImp.Request(imReq, []byte("yes?"), time.Second); err != nil {
			t.Fatalf("Expected a response to request %s got: %v", imReq, err)
		} else if string(resp.Data) != "yes!" {
			t.Fatalf("Expected a response of %q, got %q", "yes!", resp.Data)
		}
		subBar, err := ncImp.SubscribeSync(imSubExpect)
		require_NoError(t, err)
		ncImp.Flush()

		ncExp.Publish(exPub, []byte("event!"))

		if m, err := subBar.NextMsg(time.Second); err != nil {
			t.Fatalf("Expected a stream message got %v", err)
		} else if string(m.Data) != "event!" {
			t.Fatalf("Expected a response of %q, got %q", "event!", m.Data)
		}
	}
	createExporter := func() (string, string, string) {
		t.Helper()
		aExpKp, aExpPub := createKey(t)
		aExpClaim := jwt.NewAccountClaims(aExpPub)
		aExpClaim.Name = "Export"
		aExpClaim.Exports.Add(&jwt.Export{
			Subject: "$request.*.$in.*.>",
			Type:    jwt.Service,
		}, &jwt.Export{
			Subject: "$events.*.$in.*.>",
			Type:    jwt.Stream,
		})
		aExpJwt := encodeClaim(t, aExpClaim, aExpPub)
		aExpCreds := newUser(t, aExpKp)
		return aExpPub, aExpJwt, aExpCreds
	}
	t.Run("To", func(t *testing.T) {
		aExpPub, aExpJwt, aExpCreds := createExporter()
		aImpKp, aImpPub := createKey(t)
		aImpClaim := jwt.NewAccountClaims(aImpPub)
		aImpClaim.Name = "Import"
		aImpClaim.Imports.Add(&jwt.Import{
			Subject: "my.request.*.*.>",
			Type:    jwt.Service,
			To:      "$request.*.$in.*.>", // services have local and remote switched between Subject and To
			Account: aExpPub,
		}, &jwt.Import{
			Subject: "$events.*.$in.*.>",
			Type:    jwt.Stream,
			To:      "prefix",
			Account: aExpPub,
		})
		aImpJwt := encodeClaim(t, aImpClaim, aImpPub)
		aImpCreds := newUser(t, aImpKp)
		test(aExpPub, aExpJwt, aExpCreds, aImpPub, aImpJwt, aImpCreds, false,
			"$request.1.$in.2.bar", "$events.1.$in.2.bar",
			"my.request.1.2.bar", "prefix.$events.1.$in.2.bar")
	})
	t.Run("LocalSubject-No-Reorder", func(t *testing.T) {
		aExpPub, aExpJwt, aExpCreds := createExporter()
		aImpKp, aImpPub := createKey(t)
		aImpClaim := jwt.NewAccountClaims(aImpPub)
		aImpClaim.Name = "Import"
		aImpClaim.Imports.Add(&jwt.Import{
			Subject:      "$request.*.$in.*.>",
			Type:         jwt.Service,
			LocalSubject: "my.request.*.*.>",
			Account:      aExpPub,
		}, &jwt.Import{
			Subject:      "$events.*.$in.*.>",
			Type:         jwt.Stream,
			LocalSubject: "my.events.*.*.>",
			Account:      aExpPub,
		})
		aImpJwt := encodeClaim(t, aImpClaim, aImpPub)
		aImpCreds := newUser(t, aImpKp)
		test(aExpPub, aExpJwt, aExpCreds, aImpPub, aImpJwt, aImpCreds, false,
			"$request.1.$in.2.bar", "$events.1.$in.2.bar",
			"my.request.1.2.bar", "my.events.1.2.bar")
	})
	t.Run("LocalSubject-Reorder", func(t *testing.T) {
		for _, jsEnabled := range []bool{false, true} {
			t.Run(fmt.Sprintf("%t", jsEnabled), func(t *testing.T) {
				aExpPub, aExpJwt, aExpCreds := createExporter()
				aImpKp, aImpPub := createKey(t)
				aImpClaim := jwt.NewAccountClaims(aImpPub)
				aImpClaim.Name = "Import"
				aImpClaim.Imports.Add(&jwt.Import{
					Subject:      "$request.*.$in.*.>",
					Type:         jwt.Service,
					LocalSubject: "my.request.$2.$1.>",
					Account:      aExpPub,
				}, &jwt.Import{
					Subject:      "$events.*.$in.*.>",
					Type:         jwt.Stream,
					LocalSubject: "my.events.$2.$1.>",
					Account:      aExpPub,
				})
				aImpJwt := encodeClaim(t, aImpClaim, aImpPub)
				aImpCreds := newUser(t, aImpKp)
				test(aExpPub, aExpJwt, aExpCreds, aImpPub, aImpJwt, aImpCreds, jsEnabled,
					"$request.2.$in.1.bar", "$events.1.$in.2.bar",
					"my.request.1.2.bar", "my.events.2.1.bar")
			})
		}
	})
}

func TestJWTAccountTokenImportMisuse(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	aExpKp, aExpPub := createKey(t)
	aExpClaim := jwt.NewAccountClaims(aExpPub)
	aExpClaim.Name = "Export"
	aExpClaim.Exports.Add(&jwt.Export{
		Subject:  "$events.*.$in.*.>",
		Type:     jwt.Stream,
		TokenReq: true,
	}, &jwt.Export{
		Subject:  "foo",
		Type:     jwt.Stream,
		TokenReq: true,
	})
	aExpJwt := encodeClaim(t, aExpClaim, aExpPub)

	createImportingAccountClaim := func(aImpKp nkeys.KeyPair, aExpPub string, ac *jwt.ActivationClaims) (string, string) {
		t.Helper()
		token, err := ac.Encode(aExpKp)
		require_NoError(t, err)

		aImpPub, err := aImpKp.PublicKey()
		require_NoError(t, err)
		aImpClaim := jwt.NewAccountClaims(aImpPub)
		aImpClaim.Name = "Import"
		aImpClaim.Imports.Add(&jwt.Import{
			Subject: "$events.*.$in.*.>",
			Type:    jwt.Stream,
			Account: aExpPub,
			Token:   token,
		})
		aImpJwt := encodeClaim(t, aImpClaim, aImpPub)
		aImpCreds := newUser(t, aImpKp)
		return aImpJwt, aImpCreds
	}

	testConnect := func(aExpPub, aExpJwt, aImpPub, aImpJwt, aImpCreds string) {
		t.Helper()
		ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			if r.URL.Path == "/A/" {
				// Server startup
				w.Write(nil)
			} else if r.URL.Path == "/A/"+aExpPub {
				w.Write([]byte(aExpJwt))
			} else if r.URL.Path == "/A/"+aImpPub {
				w.Write([]byte(aImpJwt))
			} else {
				t.Fatal("not expected")
			}
		}))
		defer ts.Close()
		cf := createConfFile(t, []byte(fmt.Sprintf(`
			listen: 127.0.0.1:-1
			operator: %s
			resolver: URL("%s/A/")
		`, ojwt, ts.URL)))

		s, opts := RunServerWithConfig(cf)
		defer s.Shutdown()

		ncImp, err := nats.Connect(fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port), nats.UserCredentials(aImpCreds))
		require_Error(t, err) // misuse needs to result in an error
		defer ncImp.Close()
	}

	testNatsResolver := func(aImpJwt string) {
		t.Helper()
		dirSrv := t.TempDir()
		cf := createConfFile(t, []byte(fmt.Sprintf(`
			listen: 127.0.0.1:-1
			operator: %s
			system_account: %s
			resolver: {
				type: full
				dir: '%s'
			}
		`, ojwt, syspub, dirSrv)))

		s, _ := RunServerWithConfig(cf)
		defer s.Shutdown()

		require_True(t, updateJwt(t, s.ClientURL(), sysCreds, sysJwt, 1) == 1)
		require_True(t, updateJwt(t, s.ClientURL(), sysCreds, aExpJwt, 1) == 1)
		require_True(t, updateJwt(t, s.ClientURL(), sysCreds, aImpJwt, 1) == 0) // assure this did not succeed
	}

	t.Run("wrong-account", func(t *testing.T) {
		aImpKp, aImpPub := createKey(t)
		ac := &jwt.ActivationClaims{}
		_, ac.Subject = createKey(t) // on purpose issue this token for another account
		ac.ImportSubject = "$events.*.$in.*.>"
		ac.ImportType = jwt.Stream

		aImpJwt, aImpCreds := createImportingAccountClaim(aImpKp, aExpPub, ac)
		testConnect(aExpPub, aExpJwt, aImpPub, aImpJwt, aImpCreds)
		testNatsResolver(aImpJwt)
	})

	t.Run("different-subject", func(t *testing.T) {
		aImpKp, aImpPub := createKey(t)
		ac := &jwt.ActivationClaims{}
		ac.Subject = aImpPub
		ac.ImportSubject = "foo" // on purpose use a subject from another export
		ac.ImportType = jwt.Stream

		aImpJwt, aImpCreds := createImportingAccountClaim(aImpKp, aExpPub, ac)
		testConnect(aExpPub, aExpJwt, aImpPub, aImpJwt, aImpCreds)
		testNatsResolver(aImpJwt)
	})

	t.Run("non-existing-subject", func(t *testing.T) {
		aImpKp, aImpPub := createKey(t)
		ac := &jwt.ActivationClaims{}
		ac.Subject = aImpPub
		ac.ImportSubject = "does-not-exist-or-from-different-export" // on purpose use a non exported subject
		ac.ImportType = jwt.Stream

		aImpJwt, aImpCreds := createImportingAccountClaim(aImpKp, aExpPub, ac)
		testConnect(aExpPub, aExpJwt, aImpPub, aImpJwt, aImpCreds)
		testNatsResolver(aImpJwt)
	})
}

func TestJWTResponseThreshold(t *testing.T) {
	respThresh := 20 * time.Millisecond
	aExpKp, aExpPub := createKey(t)
	aExpClaim := jwt.NewAccountClaims(aExpPub)
	aExpClaim.Name = "Export"
	aExpClaim.Exports.Add(&jwt.Export{
		Subject:           "srvc",
		Type:              jwt.Service,
		ResponseThreshold: respThresh,
	})
	aExpJwt := encodeClaim(t, aExpClaim, aExpPub)
	aExpCreds := newUser(t, aExpKp)

	aImpKp, aImpPub := createKey(t)
	aImpClaim := jwt.NewAccountClaims(aImpPub)
	aImpClaim.Name = "Import"
	aImpClaim.Imports.Add(&jwt.Import{
		Subject: "srvc",
		Type:    jwt.Service,
		Account: aExpPub,
	})
	aImpJwt := encodeClaim(t, aImpClaim, aImpPub)
	aImpCreds := newUser(t, aImpKp)

	cf := createConfFile(t, []byte(fmt.Sprintf(`
		port: -1
		operator = %s
		resolver = MEMORY
		resolver_preload = {
			%s : "%s"
			%s : "%s"
		}
		`, ojwt, aExpPub, aExpJwt, aImpPub, aImpJwt)))

	s, opts := RunServerWithConfig(cf)
	defer s.Shutdown()

	ncExp := natsConnect(t, fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port), nats.UserCredentials(aExpCreds))
	defer ncExp.Close()

	ncImp := natsConnect(t, fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port), nats.UserCredentials(aImpCreds))
	defer ncImp.Close()

	delayChan := make(chan time.Duration, 1)

	// Create subscriber for the service endpoint in foo.
	_, err := ncExp.Subscribe("srvc", func(m *nats.Msg) {
		time.Sleep(<-delayChan)
		m.Respond([]byte("yes!"))
	})
	require_NoError(t, err)
	ncExp.Flush()

	t.Run("No-Timeout", func(t *testing.T) {
		delayChan <- respThresh / 2
		if resp, err := ncImp.Request("srvc", []byte("yes?"), 4*respThresh); err != nil {
			t.Fatalf("Expected a response to request srvc got: %v", err)
		} else if string(resp.Data) != "yes!" {
			t.Fatalf("Expected a response of %q, got %q", "yes!", resp.Data)
		}
	})
	t.Run("Timeout", func(t *testing.T) {
		delayChan <- 2 * respThresh
		if _, err := ncImp.Request("srvc", []byte("yes?"), 4*respThresh); err == nil || err != nats.ErrTimeout {
			t.Fatalf("Expected a timeout")
		}
	})
}

func TestJWTJetStreamTiers(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	accKp, accPub := createKey(t)
	accClaim := jwt.NewAccountClaims(accPub)
	accClaim.Name = "acc"
	accClaim.Limits.JetStreamTieredLimits["R1"] = jwt.JetStreamLimits{
		DiskStorage: 1100, MemoryStorage: 0, Consumer: 2, Streams: 2}
	accJwt1 := encodeClaim(t, accClaim, accPub)
	accCreds := newUser(t, accKp)

	start := time.Now()

	storeDir := t.TempDir()

	dirSrv := t.TempDir()
	cf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: s1
		jetstream: {max_mem_store: 256MB, max_file_store: 2GB, store_dir: '%s'}
		leaf {
			listen: 127.0.0.1:-1
		}
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
	`, storeDir, ojwt, syspub, dirSrv)))

	s, _ := RunServerWithConfig(cf)
	defer s.Shutdown()

	updateJwt(t, s.ClientURL(), sysCreds, sysJwt, 1)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt1, 1)

	nc := natsConnect(t, s.ClientURL(), nats.UserCredentials(accCreds))
	defer nc.Close()

	js, err := nc.JetStream()
	require_NoError(t, err)

	// Test tiers up to stream limits
	_, err = js.AddStream(&nats.StreamConfig{Name: "testR1-1", Replicas: 1, Subjects: []string{"testR1-1"}})
	require_NoError(t, err)
	_, err = js.AddStream(&nats.StreamConfig{Name: "testR1-2", Replicas: 1, Subjects: []string{"testR1-2"}})
	require_NoError(t, err)

	// Test exceeding tiered stream limit
	_, err = js.AddStream(&nats.StreamConfig{Name: "testR1-3", Replicas: 1, Subjects: []string{"testR1-3"}})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: maximum number of streams reached")

	// Test tiers up to consumer limits
	_, err = js.AddConsumer("testR1-1", &nats.ConsumerConfig{Durable: "dur1", AckPolicy: nats.AckExplicitPolicy})
	require_NoError(t, err)
	_, err = js.AddConsumer("testR1-1", &nats.ConsumerConfig{Durable: "dur3", AckPolicy: nats.AckExplicitPolicy})
	require_NoError(t, err)

	// test exceeding tiered consumer limits
	_, err = js.AddConsumer("testR1-1", &nats.ConsumerConfig{Durable: "dur4", AckPolicy: nats.AckExplicitPolicy})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: maximum consumers limit reached")
	_, err = js.AddConsumer("testR1-1", &nats.ConsumerConfig{Durable: "dur5", AckPolicy: nats.AckExplicitPolicy})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: maximum consumers limit reached")

	// test tiered storage limit
	msg := [512]byte{}
	_, err = js.Publish("testR1-1", msg[:])
	require_NoError(t, err)
	_, err = js.Publish("testR1-2", msg[:])
	require_NoError(t, err)

	ainfo, err := js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 1100)

	// test exceeding tiered storage limit
	_, err = js.Publish("testR1-1", []byte("1"))
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: resource limits exceeded for account")

	// Check that storage has not increased after the rejected publish.
	ainfo, err = js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 1100)

	time.Sleep(time.Second - time.Since(start)) // make sure the time stamp changes
	accClaim.Limits.JetStreamTieredLimits["R1"] = jwt.JetStreamLimits{
		DiskStorage: 1650, MemoryStorage: 0, Consumer: 1, Streams: 3}
	accJwt2 := encodeClaim(t, accClaim, accPub)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt2, 1)

	// test same sequence as before, add stream, fail add stream, add consumer, fail add consumer, publish, fail publish
	_, err = js.AddStream(&nats.StreamConfig{Name: "testR1-3", Replicas: 1, Subjects: []string{"testR1-3"}})
	require_NoError(t, err)
	_, err = js.AddStream(&nats.StreamConfig{Name: "testR1-4", Replicas: 1, Subjects: []string{"testR1-4"}})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: maximum number of streams reached")
	_, err = js.AddConsumer("testR1-3", &nats.ConsumerConfig{Durable: "dur6", AckPolicy: nats.AckExplicitPolicy})
	require_NoError(t, err)
	_, err = js.AddConsumer("testR1-3", &nats.ConsumerConfig{Durable: "dur7", AckPolicy: nats.AckExplicitPolicy})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: maximum consumers limit reached")

	// At this point it will be exactly at the DiskStorage limit so it should not fail.
	_, err = js.Publish("testR1-3", msg[:])
	require_NoError(t, err)
	ainfo, err = js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 1650)

	_, err = js.Publish("testR1-3", []byte("1"))
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: resource limits exceeded for account")

	// Should remain at the same usage.
	ainfo, err = js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 1650)
}

func TestJWTJetStreamMaxAckPending(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	accKp, accPub := createKey(t)
	accClaim := jwt.NewAccountClaims(accPub)
	accClaim.Name = "acc"
	accClaim.Limits.JetStreamTieredLimits["R1"] = jwt.JetStreamLimits{
		DiskStorage: jwt.NoLimit, MemoryStorage: jwt.NoLimit,
		Consumer: jwt.NoLimit, Streams: jwt.NoLimit, MaxAckPending: int64(1000),
	}
	accJwt1 := encodeClaim(t, accClaim, accPub)
	accCreds := newUser(t, accKp)

	start := time.Now()

	storeDir := t.TempDir()

	dirSrv := t.TempDir()
	cf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: s1
		jetstream: {max_mem_store: 256MB, max_file_store: 2GB, store_dir: '%s'}
		leaf {
			listen: 127.0.0.1:-1
		}
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
	`, storeDir, ojwt, syspub, dirSrv)))

	s, _ := RunServerWithConfig(cf)
	defer s.Shutdown()

	updateJwt(t, s.ClientURL(), sysCreds, sysJwt, 1)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt1, 1)

	nc := natsConnect(t, s.ClientURL(), nats.UserCredentials(accCreds))
	defer nc.Close()

	js, err := nc.JetStream()
	require_NoError(t, err)

	_, err = js.AddStream(&nats.StreamConfig{Name: "foo", Replicas: 1})
	require_NoError(t, err)

	_, err = js.AddConsumer("foo", &nats.ConsumerConfig{
		Durable: "dur1", AckPolicy: nats.AckAllPolicy, MaxAckPending: 2000})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: consumer max ack pending exceeds system limit of 1000")

	ci, err := js.AddConsumer("foo", &nats.ConsumerConfig{
		Durable: "dur2", AckPolicy: nats.AckAllPolicy, MaxAckPending: 500})
	require_NoError(t, err)
	require_True(t, ci.Config.MaxAckPending == 500)

	_, err = js.UpdateConsumer("foo", &nats.ConsumerConfig{
		Durable: "dur2", AckPolicy: nats.AckAllPolicy, MaxAckPending: 2000})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: consumer max ack pending exceeds system limit of 1000")

	time.Sleep(time.Second - time.Since(start)) // make sure the time stamp changes
	accClaim.Limits.JetStreamTieredLimits["R1"] = jwt.JetStreamLimits{
		DiskStorage: jwt.NoLimit, MemoryStorage: jwt.NoLimit, Consumer: jwt.NoLimit,
		Streams: jwt.NoLimit, MaxAckPending: int64(2000)}
	accJwt2 := encodeClaim(t, accClaim, accPub)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt2, 1)

	ci, err = js.UpdateConsumer("foo", &nats.ConsumerConfig{
		Durable: "dur2", AckPolicy: nats.AckAllPolicy, MaxAckPending: 2000})
	require_NoError(t, err)
	require_True(t, ci.Config.MaxAckPending == 2000)
}

func TestJWTJetStreamMaxStore(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	accKp, accPub := createKey(t)
	accClaim := jwt.NewAccountClaims(accPub)
	accClaim.Name = "acc"
	accClaim.Limits.JetStreamTieredLimits["R1"] = jwt.JetStreamLimits{
		DiskStorage: 1024, MemoryStorage: jwt.NoLimit,
		Consumer: jwt.NoLimit, Streams: jwt.NoLimit,
		DiskMaxStreamBytes: 1024, MaxBytesRequired: false,
	}
	accJwt1 := encodeClaim(t, accClaim, accPub)
	accCreds := newUser(t, accKp)

	start := time.Now()

	storeDir := t.TempDir()

	dirSrv := t.TempDir()
	cf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: s1
		jetstream: {max_mem_store: 256MB, max_file_store: 2GB, store_dir: '%s'}
		leaf {
			listen: 127.0.0.1:-1
		}
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
	`, storeDir, ojwt, syspub, dirSrv)))

	s, _ := RunServerWithConfig(cf)
	defer s.Shutdown()

	updateJwt(t, s.ClientURL(), sysCreds, sysJwt, 1)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt1, 1)

	nc := natsConnect(t, s.ClientURL(), nats.UserCredentials(accCreds))
	defer nc.Close()

	js, err := nc.JetStream()
	require_NoError(t, err)

	_, err = js.AddStream(&nats.StreamConfig{Name: "foo", Replicas: 1, MaxBytes: 2048})
	require_Error(t, err, NewJSStorageResourcesExceededError())
	_, err = js.AddStream(&nats.StreamConfig{Name: "foo", Replicas: 1, MaxBytes: 1024})
	require_NoError(t, err)

	msg := [900]byte{}
	_, err = js.Publish("foo", msg[:])
	require_NoError(t, err)
	_, err = js.Publish("foo", msg[:]) // exceeds storage limit
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: resource limits exceeded for account")

	time.Sleep(time.Second - time.Since(start)) // make sure the time stamp changes
	accClaim.Limits.JetStreamTieredLimits["R1"] = jwt.JetStreamLimits{
		DiskStorage: 3072, MemoryStorage: jwt.NoLimit, Consumer: jwt.NoLimit, Streams: jwt.NoLimit,
		DiskMaxStreamBytes: 2048, MaxBytesRequired: true}
	accJwt2 := encodeClaim(t, accClaim, accPub)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt2, 1)

	_, err = js.AddStream(&nats.StreamConfig{Name: "bar", Replicas: 1, MaxBytes: 3000})
	require_Error(t, err, NewJSStorageResourcesExceededError())
	_, err = js.AddStream(&nats.StreamConfig{Name: "bar", Replicas: 1, MaxBytes: 2048})
	require_NoError(t, err)

	ainfo, err := js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 933)

	// This should be exactly at the limit of the account.
	_, err = js.Publish("foo", []byte(strings.Repeat("A", 991)))
	require_NoError(t, err)
	ainfo, err = js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 1024)
	_, err = js.Publish("bar", []byte(strings.Repeat("A", 2015)))
	require_NoError(t, err)
	ainfo, err = js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 3072)

	// Exceed storage limit.
	_, err = js.Publish("bar", []byte("1"))
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: resource limits exceeded for account")

	// Confirm no changes after rejected publish.
	ainfo, err = js.AccountInfo()
	require_NoError(t, err)
	require_Equal(t, ainfo.Tiers["R1"].Store, 3072)

	// test disabling max bytes required
	_, err = js.UpdateStream(&nats.StreamConfig{Name: "bar", Replicas: 1})
	require_Error(t, err)
	require_Equal(t, err.Error(), "nats: account requires a stream config to have max bytes set")
}

func TestJWTQueuePermissions(t *testing.T) {
	aExpKp, aExpPub := createKey(t)
	aExpClaim := jwt.NewAccountClaims(aExpPub)
	aExpJwt := encodeClaim(t, aExpClaim, aExpPub)
	newUser := func(t *testing.T, permType string) string {
		ukp, _ := nkeys.CreateUser()
		seed, _ := ukp.Seed()
		upub, _ := ukp.PublicKey()
		uclaim := newJWTTestUserClaims()
		uclaim.Subject = upub
		switch permType {
		case "allow":
			uclaim.Permissions.Sub.Allow.Add("foo.> *.dev")
		case "deny":
			uclaim.Permissions.Sub.Deny.Add("foo.> *.dev")
		}
		ujwt, err := uclaim.Encode(aExpKp)
		require_NoError(t, err)
		return genCredsFile(t, ujwt, seed)
	}
	confFileName := createConfFile(t, []byte(fmt.Sprintf(`
		port: -1
		operator = %s
		resolver = MEMORY
		resolver_preload = {
			%s : %s
		}`, ojwt, aExpPub, aExpJwt)))
	opts, err := ProcessConfigFile(confFileName)
	if err != nil {
		t.Fatalf("Received unexpected error %s", err)
	}
	opts.NoLog, opts.NoSigs = true, true
	errChan := make(chan error, 1)
	defer close(errChan)
	s := RunServer(opts)
	defer s.Shutdown()

	for _, test := range []struct {
		permType    string
		queue       string
		errExpected bool
	}{
		{"allow", "queue.dev", false},
		{"allow", "", true},
		{"allow", "bad", true},
		{"deny", "", false},
		{"deny", "queue.dev", true},
	} {
		t.Run(test.permType+test.queue, func(t *testing.T) {
			usrCreds := newUser(t, test.permType)
			nc, err := nats.Connect(fmt.Sprintf("nats://127.0.0.1:%d", opts.Port),
				nats.ErrorHandler(func(conn *nats.Conn, s *nats.Subscription, err error) {
					errChan <- err
				}),
				nats.UserCredentials(usrCreds))
			if err != nil {
				t.Fatalf("No error expected: %v", err)
			}
			defer nc.Close()
			if test.queue == "" {
				if _, err := nc.Subscribe("foo.bar", func(msg *nats.Msg) {}); err != nil {
					t.Fatalf("no error expected: %v", err)
				}
			} else {
				if _, err := nc.QueueSubscribe("foo.bar", test.queue, func(msg *nats.Msg) {}); err != nil {
					t.Fatalf("no error expected: %v", err)
				}
			}
			nc.Flush()
			select {
			case err := <-errChan:
				if !test.errExpected {
					t.Fatalf("Expected no error, got %v", err)
				}
				if !strings.Contains(err.Error(), `Permissions Violation for Subscription to "foo.bar"`) {
					t.Fatalf("error %v", err)
				}
			case <-time.After(150 * time.Millisecond):
				if test.errExpected {
					t.Fatal("Expected an error")
				}
			}
		})

	}
}

func TestJWTScopedSigningKeys(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	_, aExpPub := createKey(t)
	accClaim := jwt.NewAccountClaims(aExpPub)
	accClaim.Name = "acc"

	aSignNonScopedKp, aSignNonScopedPub := createKey(t)
	accClaim.SigningKeys.Add(aSignNonScopedPub)

	aSignScopedKp, aSignScopedPub := createKey(t)
	signer := jwt.NewUserScope()
	signer.Key = aSignScopedPub
	signer.Template.Pub.Deny.Add("denied")
	signer.Template.Payload = 5
	signer.Template.AllowedConnectionTypes.Add(jwt.ConnectionTypeStandard)
	accClaim.SigningKeys.AddScopedSigner(signer)
	accJwt := encodeClaim(t, accClaim, aExpPub)

	aNonScopedCreds := newUserEx(t, aSignNonScopedKp, false, aExpPub)
	aBadScopedCreds := newUserEx(t, aSignScopedKp, false, aExpPub)
	aScopedCreds := newUserEx(t, aSignScopedKp, true, aExpPub)

	dirSrv := t.TempDir()
	cf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
		websocket {
			listen: 127.0.0.1:-1
			no_tls: true
		}
    `, ojwt, syspub, dirSrv)))
	s, opts := RunServerWithConfig(cf)
	defer s.Shutdown()

	url := fmt.Sprintf("nats://%s:%d", opts.Host, opts.Port)
	wsUrl := fmt.Sprintf("ws://%s:%d", opts.Websocket.Host, opts.Websocket.Port)
	errChan := make(chan error, 1)
	defer close(errChan)
	awaitError := func(expected bool) {
		t.Helper()
		select {
		case err := <-errChan:
			if !expected {
				t.Fatalf("Expected no error, got %v", err)
			}
		case <-time.After(150 * time.Millisecond):
			if expected {
				t.Fatal("Expected an error")
			}
		}
	}
	errHdlr := nats.ErrorHandler(func(conn *nats.Conn, s *nats.Subscription, err error) {
		errChan <- err
	})
	if updateJwt(t, url, sysCreds, sysJwt, 1) != 1 {
		t.Error("Expected update to pass")
	} else if updateJwt(t, url, sysCreds, accJwt, 1) != 1 {
		t.Error("Expected update to pass")
	}
	t.Run("bad-scoped-signing-key", func(t *testing.T) {
		_, err := nats.Connect(url, nats.UserCredentials(aBadScopedCreds))
		require_Error(t, err)
	})
	t.Run("regular-signing-key", func(t *testing.T) {
		nc := natsConnect(t, url, nats.UserCredentials(aNonScopedCreds), errHdlr)
		defer nc.Close()
		nc.Flush()
		err := nc.Publish("denied", nil)
		require_NoError(t, err)
		nc.Flush()
		awaitError(false)
	})
	t.Run("scoped-signing-key-client-side", func(t *testing.T) {
		nc := natsConnect(t, url, nats.UserCredentials(aScopedCreds), errHdlr)
		defer nc.Close()
		nc.Flush()
		err := nc.Publish("too-long", []byte("way.too.long.for.payload.limit"))
		require_Error(t, err)
		require_True(t, strings.Contains(err.Error(), ErrMaxPayload.Error()))
	})
	t.Run("scoped-signing-key-server-side", func(t *testing.T) {
		nc := natsConnect(t, url, nats.UserCredentials(aScopedCreds), errHdlr)
		defer nc.Close()
		nc.Flush()
		err := nc.Publish("denied", nil)
		require_NoError(t, err)
		nc.Flush()
		awaitError(true)
	})
	t.Run("scoped-signing-key-allowed-conn-types", func(t *testing.T) {
		_, err := nats.Connect(wsUrl, nats.UserCredentials(aScopedCreds))
		require_Error(t, err)
	})
	t.Run("scoped-signing-key-reload", func(t *testing.T) {
		reconChan := make(chan struct{}, 1)
		defer close(reconChan)
		msgChan := make(chan *nats.Msg, 2)
		defer close(msgChan)
		nc := natsConnect(t, url, nats.UserCredentials(aScopedCreds), errHdlr,
			nats.DisconnectErrHandler(func(conn *nats.Conn, err error) {
				if err != nil {
					errChan <- err
				}
			}),
			nats.ReconnectHandler(func(conn *nats.Conn) {
				reconChan <- struct{}{}
			}),
			nats.ReconnectWait(100*time.Millisecond),
		)
		defer nc.Close()
		_, err := nc.ChanSubscribe("denied", msgChan)
		require_NoError(t, err)
		nc.Flush()
		err = nc.Publish("denied", nil)
		require_NoError(t, err)
		awaitError(true)
		require_Len(t, len(msgChan), 0)
		// Alter scoped permissions and update
		signer.Template.Payload = -1
		signer.Template.Pub.Deny.Remove("denied")
		signer.Template.AllowedConnectionTypes.Add(jwt.ConnectionTypeWebsocket)
		accClaim.SigningKeys.AddScopedSigner(signer)
		accUpdatedJwt := encodeClaim(t, accClaim, aExpPub)
		if updateJwt(t, url, sysCreds, accUpdatedJwt, 1) != 1 {
			t.Error("Expected update to pass")
		}
		// disconnect triggered by update
		awaitError(true)
		<-reconChan
		nc.Flush()
		err = nc.Publish("denied", []byte("way.too.long.for.old.payload.limit"))
		require_NoError(t, err)
		awaitError(false)
		msg := <-msgChan
		require_Equal(t, string(msg.Data), "way.too.long.for.old.payload.limit")
		require_Len(t, len(msgChan), 0)
		nc.Close()
		nc, err = nats.Connect(wsUrl, nats.UserCredentials(aScopedCreds))
		require_NoError(t, err)
		nc.Flush()
		defer nc.Close()
	})
	require_Len(t, len(errChan), 0)
}

func TestJWTStrictSigningKeys(t *testing.T) {
	newAccount := func(opKp nkeys.KeyPair) (nkeys.KeyPair, nkeys.KeyPair, string, *jwt.AccountClaims, string) {
		accId, err := nkeys.CreateAccount()
		require_NoError(t, err)
		accIdPub, err := accId.PublicKey()
		require_NoError(t, err)

		accSig, err := nkeys.CreateAccount()
		require_NoError(t, err)
		accSigPub, err := accSig.PublicKey()
		require_NoError(t, err)

		aClaim := jwt.NewAccountClaims(accIdPub)
		aClaim.SigningKeys.Add(accSigPub)
		theJwt, err := aClaim.Encode(opKp)
		require_NoError(t, err)
		return accId, accSig, accIdPub, aClaim, theJwt
	}

	opId, err := nkeys.CreateOperator()
	require_NoError(t, err)
	opIdPub, err := opId.PublicKey()
	require_NoError(t, err)

	opSig, err := nkeys.CreateOperator()
	require_NoError(t, err)
	opSigPub, err := opSig.PublicKey()
	require_NoError(t, err)

	aBadBadKp, aBadGoodKp, aBadPub, _, aBadJwt := newAccount(opId)
	aGoodBadKp, aGoodGoodKp, aGoodPub, _, aGoodJwt := newAccount(opSig)
	_, aSysKp, aSysPub, _, aSysJwt := newAccount(opSig)

	oClaim := jwt.NewOperatorClaims(opIdPub)
	oClaim.StrictSigningKeyUsage = true
	oClaim.SigningKeys.Add(opSigPub)
	oClaim.SystemAccount = aSysPub
	oJwt, err := oClaim.Encode(opId)
	require_NoError(t, err)

	uBadBadCreds := newUserEx(t, aBadBadKp, false, aBadPub)
	uBadGoodCreds := newUserEx(t, aBadGoodKp, false, aBadPub)
	uGoodBadCreds := newUserEx(t, aGoodBadKp, false, aGoodPub)
	uGoodGoodCreds := newUserEx(t, aGoodGoodKp, false, aGoodPub)
	uSysCreds := newUserEx(t, aSysKp, false, aSysPub)

	connectTest := func(url string) {
		for _, test := range []struct {
			creds string
			fail  bool
		}{
			{uBadBadCreds, true},
			{uBadGoodCreds, true},
			{uGoodBadCreds, true},
			{uGoodGoodCreds, false},
		} {
			nc, err := nats.Connect(url, nats.UserCredentials(test.creds))
			nc.Close()
			if test.fail {
				require_Error(t, err)
			} else {
				require_NoError(t, err)
			}
		}
	}

	t.Run("resolver", func(t *testing.T) {
		dirSrv := t.TempDir()
		cf := createConfFile(t, []byte(fmt.Sprintf(`
		port: -1
		operator = %s
		resolver: {
			type: full
			dir: '%s'
		}
		resolver_preload = {
			%s : "%s"
		}
		`, oJwt, dirSrv, aSysPub, aSysJwt)))
		s, _ := RunServerWithConfig(cf)
		defer s.Shutdown()
		url := s.ClientURL()
		if updateJwt(t, url, uSysCreds, aBadJwt, 1) != 0 {
			t.Fatal("Expected negative response")
		}
		if updateJwt(t, url, uSysCreds, aGoodJwt, 1) != 1 {
			t.Fatal("Expected positive response")
		}
		connectTest(url)
	})

	t.Run("mem-resolver", func(t *testing.T) {
		cf := createConfFile(t, []byte(fmt.Sprintf(`
		port: -1
		operator = %s
		resolver: MEMORY
		resolver_preload = {
			%s : "%s"
			%s : "%s"
			%s : "%s"
		}
		`, oJwt, aSysPub, aSysJwt, aBadPub, aBadJwt, aGoodPub, aGoodJwt)))
		s, _ := RunServerWithConfig(cf)
		defer s.Shutdown()
		connectTest(s.ClientURL())
	})
}

func TestJWTAccountProtectedImport(t *testing.T) {
	srvFmt := `
		port: -1
		operator = %s
		resolver: MEMORY
		resolver_preload = {
			%s : "%s"
			%s : "%s"
		} `
	setupAccounts := func(pass bool) (nkeys.KeyPair, string, string, string, nkeys.KeyPair, string, string, string, string) {
		// Create accounts and imports/exports.
		exportKP, _ := nkeys.CreateAccount()
		exportPub, _ := exportKP.PublicKey()
		exportAC := jwt.NewAccountClaims(exportPub)
		exportAC.Exports.Add(&jwt.Export{Subject: "service.*", Type: jwt.Service, AccountTokenPosition: 2})
		exportAC.Exports.Add(&jwt.Export{Subject: "stream.*", Type: jwt.Stream, AccountTokenPosition: 2})
		exportJWT, err := exportAC.Encode(oKp)
		require_NoError(t, err)
		// create alternative exporter jwt without account token pos set
		exportAC.Exports = jwt.Exports{}
		exportAC.Exports.Add(&jwt.Export{Subject: "service.*", Type: jwt.Service})
		exportAC.Exports.Add(&jwt.Export{Subject: "stream.*", Type: jwt.Stream})
		exportJWTNoPos, err := exportAC.Encode(oKp)
		require_NoError(t, err)

		importKP, _ := nkeys.CreateAccount()
		importPub, _ := importKP.PublicKey()
		importAc := jwt.NewAccountClaims(importPub)
		srvcSub, strmSub := "service.foo", "stream.foo"
		if pass {
			srvcSub = fmt.Sprintf("service.%s", importPub)
			strmSub = fmt.Sprintf("stream.%s", importPub)
		}
		importAc.Imports.Add(&jwt.Import{Account: exportPub, Subject: jwt.Subject(srvcSub), Type: jwt.Service})
		importAc.Imports.Add(&jwt.Import{Account: exportPub, Subject: jwt.Subject(strmSub), Type: jwt.Stream})
		importJWT, err := importAc.Encode(oKp)
		require_NoError(t, err)

		return exportKP, exportPub, exportJWT, exportJWTNoPos, importKP, importPub, importJWT, srvcSub, strmSub
	}
	t.Run("pass", func(t *testing.T) {
		exportKp, exportPub, exportJWT, _, importKp, importPub, importJWT, srvcSub, strmSub := setupAccounts(true)
		cf := createConfFile(t, []byte(fmt.Sprintf(srvFmt, ojwt, exportPub, exportJWT, importPub, importJWT)))
		s, _ := RunServerWithConfig(cf)
		defer s.Shutdown()
		ncExp := natsConnect(t, s.ClientURL(), createUserCreds(t, s, exportKp))
		defer ncExp.Close()
		ncImp := natsConnect(t, s.ClientURL(), createUserCreds(t, s, importKp))
		defer ncImp.Close()
		t.Run("service", func(t *testing.T) {
			sub, err := ncExp.Subscribe("service.*", func(msg *nats.Msg) {
				msg.Respond([]byte("world"))
			})
			defer sub.Unsubscribe()
			require_NoError(t, err)
			ncExp.Flush()
			msg, err := ncImp.Request(srvcSub, []byte("hello"), time.Second)
			require_NoError(t, err)
			require_Equal(t, string(msg.Data), "world")
		})
		t.Run("stream", func(t *testing.T) {
			msgChan := make(chan *nats.Msg, 4)
			defer close(msgChan)
			sub, err := ncImp.ChanSubscribe(strmSub, msgChan)
			defer sub.Unsubscribe()
			require_NoError(t, err)
			ncImp.Flush()
			err = ncExp.Publish("stream.foo", []byte("hello"))
			require_NoError(t, err)
			err = ncExp.Publish(strmSub, []byte("hello"))
			require_NoError(t, err)
			msg := <-msgChan
			require_Equal(t, string(msg.Data), "hello")
			require_True(t, len(msgChan) == 0)
		})
	})
	t.Run("fail", func(t *testing.T) {
		exportKp, exportPub, exportJWT, _, importKp, importPub, importJWT, srvcSub, strmSub := setupAccounts(false)
		cf := createConfFile(t, []byte(fmt.Sprintf(srvFmt, ojwt, exportPub, exportJWT, importPub, importJWT)))
		s, _ := RunServerWithConfig(cf)
		defer s.Shutdown()
		ncExp := natsConnect(t, s.ClientURL(), createUserCreds(t, s, exportKp))
		defer ncExp.Close()
		ncImp := natsConnect(t, s.ClientURL(), createUserCreds(t, s, importKp))
		defer ncImp.Close()
		t.Run("service", func(t *testing.T) {
			sub, err := ncExp.Subscribe("service.*", func(msg *nats.Msg) {
				msg.Respond([]byte("world"))
			})
			defer sub.Unsubscribe()
			require_NoError(t, err)
			ncExp.Flush()
			_, err = ncImp.Request(srvcSub, []byte("hello"), time.Second)
			require_Error(t, err)
			require_Contains(t, err.Error(), "no responders available for request")
		})
		t.Run("stream", func(t *testing.T) {
			msgChan := make(chan *nats.Msg, 4)
			defer close(msgChan)
			_, err := ncImp.ChanSubscribe(strmSub, msgChan)
			require_NoError(t, err)
			ncImp.Flush()
			err = ncExp.Publish("stream.foo", []byte("hello"))
			require_NoError(t, err)
			err = ncExp.Publish(strmSub, []byte("hello"))
			require_NoError(t, err)
			select {
			case <-msgChan:
				t.Fatal("did not expect a message")
			case <-time.After(250 * time.Millisecond):
			}
			require_True(t, len(msgChan) == 0)
		})
	})
	t.Run("reload-off-2-on", func(t *testing.T) {
		exportKp, exportPub, exportJWTOn, exportJWTOff, importKp, _, importJWT, srvcSub, strmSub := setupAccounts(false)
		dirSrv := t.TempDir()
		// set up system account. Relying bootstrapping system account to not create JWT
		sysAcc, err := nkeys.CreateAccount()
		require_NoError(t, err)
		sysPub, err := sysAcc.PublicKey()
		require_NoError(t, err)
		sysUsrCreds := newUserEx(t, sysAcc, false, sysPub)
		cf := createConfFile(t, []byte(fmt.Sprintf(`
		port: -1
		operator = %s
		system_account = %s
		resolver: {
			type: full
			dir: '%s'
		}`, ojwt, sysPub, dirSrv)))
		s, _ := RunServerWithConfig(cf)
		defer s.Shutdown()
		updateJwt(t, s.ClientURL(), sysUsrCreds, importJWT, 1)
		updateJwt(t, s.ClientURL(), sysUsrCreds, exportJWTOff, 1)
		ncExp := natsConnect(t, s.ClientURL(), createUserCreds(t, s, exportKp))
		defer ncExp.Close()
		ncImp := natsConnect(t, s.ClientURL(), createUserCreds(t, s, importKp))
		defer ncImp.Close()
		msgChan := make(chan *nats.Msg, 4)
		defer close(msgChan)
		// ensure service passes
		subSrvc, err := ncExp.Subscribe("service.*", func(msg *nats.Msg) {
			msg.Respond([]byte("world"))
		})
		defer subSrvc.Unsubscribe()
		require_NoError(t, err)
		ncExp.Flush()
		respMst, err := ncImp.Request(srvcSub, []byte("hello"), time.Second)
		require_NoError(t, err)
		require_Equal(t, string(respMst.Data), "world")
		// ensure stream passes
		subStrm, err := ncImp.ChanSubscribe(strmSub, msgChan)
		defer subStrm.Unsubscribe()
		require_NoError(t, err)
		ncImp.Flush()
		err = ncExp.Publish(strmSub, []byte("hello"))
		require_NoError(t, err)
		msg := <-msgChan
		require_Equal(t, string(msg.Data), "hello")
		require_True(t, len(msgChan) == 0)

		updateJwt(t, s.ClientURL(), sysUsrCreds, exportJWTOn, 1)

		// ensure service fails
		_, err = ncImp.Request(srvcSub, []byte("hello"), time.Second)
		require_Error(t, err, nats.ErrNoResponders)
		s.AccountResolver().Store(exportPub, exportJWTOn)
		// ensure stream fails
		err = ncExp.Publish(strmSub, []byte("hello"))
		require_NoError(t, err)
		select {
		case <-msgChan:
			t.Fatal("did not expect a message")
		case <-time.After(250 * time.Millisecond):
		}
		require_True(t, len(msgChan) == 0)
	})
}

// Headers are ignored in claims update, but passing them should not cause error.
func TestJWTClaimsUpdateWithHeaders(t *testing.T) {
	skp, spub := createKey(t)
	newUser(t, skp)

	sclaim := jwt.NewAccountClaims(spub)
	encodeClaim(t, sclaim, spub)

	akp, apub := createKey(t)
	newUser(t, akp)
	claim := jwt.NewAccountClaims(apub)
	jwtClaim := encodeClaim(t, claim, apub)

	dirSrv := t.TempDir()

	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			allow_delete: true
		}
    `, ojwt, spub, dirSrv)))

	s, _ := RunServerWithConfig(conf)
	defer s.Shutdown()

	type zapi struct {
		Server *ServerInfo
		Data   *Connz
		Error  *ApiError
	}

	sc := natsConnect(t, s.ClientURL(), createUserCreds(t, s, skp))
	defer sc.Close()
	// Pass claims update with headers.
	msg := &nats.Msg{
		Subject: "$SYS.REQ.CLAIMS.UPDATE",
		Data:    []byte(jwtClaim),
		Header:  map[string][]string{"key": {"value"}},
	}
	resp, err := sc.RequestMsg(msg, time.Second)
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	var cz zapi
	if err := json.Unmarshal(resp.Data, &cz); err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	if cz.Error != nil {
		t.Fatalf("Unexpected error: %+v", cz.Error)
	}

	// Pass claims delete with headers.
	opk, err := oKp.PublicKey()
	require_NoError(t, err)
	c := jwt.NewGenericClaims(opk)
	c.Data["accounts"] = []string{apub}
	djwt, err := c.Encode(oKp)
	require_NoError(t, err)
	msg.Subject = "$SYS.REQ.CLAIMS.DELETE"
	msg.Data = []byte(djwt)
	resp, err = sc.RequestMsg(msg, time.Second)
	if err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	cz = zapi{}
	if err := json.Unmarshal(resp.Data, &cz); err != nil {
		t.Fatalf("Unexpected error: %v", err)
	}
	if cz.Error != nil {
		t.Fatalf("Unexpected error: %+v", cz.Error)
	}
}

func TestJWTMappings(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	// create two jwt, one with and one without mapping
	aKp, aPub := createKey(t)
	aClaim := jwt.NewAccountClaims(aPub)
	aJwtNoM := encodeClaim(t, aClaim, aPub)
	aClaim.AddMapping("foo1", jwt.WeightedMapping{Subject: "bar1"})
	aJwtMap1 := encodeClaim(t, aClaim, aPub)

	aClaim.Mappings = map[jwt.Subject][]jwt.WeightedMapping{}
	aClaim.AddMapping("foo2", jwt.WeightedMapping{Subject: "bar2"})
	aJwtMap2 := encodeClaim(t, aClaim, aPub)

	dirSrv := t.TempDir()
	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
    `, ojwt, syspub, dirSrv)))
	srv, _ := RunServerWithConfig(conf)
	defer srv.Shutdown()
	updateJwt(t, srv.ClientURL(), sysCreds, sysJwt, 1) // update system account jwt

	test := func(pub, sub string, fail bool) {
		t.Helper()
		nc := natsConnect(t, srv.ClientURL(), createUserCreds(t, srv, aKp))
		defer nc.Close()
		s, err := nc.SubscribeSync(sub)
		require_NoError(t, err)
		nc.Flush()
		err = nc.Publish(pub, nil)
		require_NoError(t, err)
		_, err = s.NextMsg(500 * time.Millisecond)
		switch {
		case fail && err == nil:
			t.Fatal("expected error, got none")
		case !fail && err != nil:
			t.Fatalf("expected no error, got %v", err)
		}
	}

	// turn mappings on
	require_Len(t, 1, updateJwt(t, srv.ClientURL(), sysCreds, aJwtMap1, 1))
	test("foo1", "bar1", false)
	// alter mappings
	require_Len(t, 1, updateJwt(t, srv.ClientURL(), sysCreds, aJwtMap2, 1))
	test("foo1", "bar1", true)
	test("foo2", "bar2", false)
	// turn mappings off
	require_Len(t, 1, updateJwt(t, srv.ClientURL(), sysCreds, aJwtNoM, 1))
	test("foo2", "bar2", true)
}

func TestJWTOperatorPinnedAccounts(t *testing.T) {
	kps, pubs, jwts := [4]nkeys.KeyPair{}, [4]string{}, [4]string{}
	for i := 0; i < 4; i++ {
		kps[i], pubs[i] = createKey(t)
		jwts[i] = encodeClaim(t, jwt.NewAccountClaims(pubs[i]), pubs[i])
	}
	// create system account user credentials, index 0 is handled as system account
	newUser(t, kps[0])

	cfgCommon := fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: MEM
		resolver_preload: {
			%s:%s
			%s:%s
			%s:%s
			%s:%s
		}`, ojwt, pubs[0], pubs[0], jwts[0], pubs[1], jwts[1], pubs[2], jwts[2], pubs[3], jwts[3])
	cfgFmt := cfgCommon + `
		resolver_pinned_accounts: [%s, %s]
	`
	conf := createConfFile(t, []byte(fmt.Sprintf(cfgFmt, pubs[1], pubs[2])))
	srv, _ := RunServerWithConfig(conf)
	defer srv.Shutdown()

	connectPass := func(keys ...nkeys.KeyPair) {
		for _, kp := range keys {
			nc, err := nats.Connect(srv.ClientURL(), createUserCreds(t, srv, kp))
			require_NoError(t, err)
			defer nc.Close()
		}
	}
	var pinnedFail uint64
	connectFail := func(key nkeys.KeyPair) {
		_, err := nats.Connect(srv.ClientURL(), createUserCreds(t, srv, key))
		require_Error(t, err)
		require_Contains(t, err.Error(), "Authorization Violation")
		v, err := srv.Varz(&VarzOptions{})
		require_NoError(t, err)
		require_True(t, pinnedFail+1 == v.PinnedAccountFail)
		pinnedFail = v.PinnedAccountFail
	}

	connectPass(kps[0], kps[1], kps[2]) // make sure user from accounts listed and system account (index 0) work
	connectFail(kps[3])                 // make sure the other user does not work
	// reload and test again
	reloadUpdateConfig(t, srv, conf, fmt.Sprintf(cfgFmt, pubs[2], pubs[3]))
	connectPass(kps[0], kps[2], kps[3]) // make sure user from accounts listed and system account (index 0) work
	connectFail(kps[1])                 // make sure the other user does not work
	// completely disable and test again
	reloadUpdateConfig(t, srv, conf, cfgCommon)
	connectPass(kps[0], kps[1], kps[2], kps[3]) // make sure every account and system account (index 0) can connect
	// re-enable and test again
	reloadUpdateConfig(t, srv, conf, fmt.Sprintf(cfgFmt, pubs[2], pubs[3]))
	connectPass(kps[0], kps[2], kps[3]) // make sure user from accounts listed and system account (index 0) work
	connectFail(kps[1])                 // make sure the other user does not work
}

func TestJWTNoSystemAccountButNatsResolver(t *testing.T) {
	dirSrv := t.TempDir()
	for _, resType := range []string{"full", "cache"} {
		t.Run(resType, func(t *testing.T) {
			conf := createConfFile(t, []byte(fmt.Sprintf(`
			listen: 127.0.0.1:-1
			operator: %s
			resolver: {
				type: %s
				dir: '%s'
			}`, ojwt, resType, dirSrv)))
			opts := LoadConfig(conf)
			s, err := NewServer(opts)
			// Since the server cannot be stopped, since it did not start,
			// let's manually close the account resolver to avoid leaking go routines.
			opts.AccountResolver.Close()
			s.Shutdown()
			require_Error(t, err)
			require_Contains(t, err.Error(), "the system account needs to be specified in configuration or the operator jwt")
		})
	}
}

func TestJWTAccountConnzAccessAfterClaimUpdate(t *testing.T) {
	skp, spub := createKey(t)
	newUser(t, skp)

	sclaim := jwt.NewAccountClaims(spub)
	sclaim.AddMapping("foo.bar", jwt.WeightedMapping{Subject: "foo.baz"})
	sjwt := encodeClaim(t, sclaim, spub)

	// create two jwt, one with and one without mapping
	akp, apub := createKey(t)
	newUser(t, akp)
	claim := jwt.NewAccountClaims(apub)
	jwt1 := encodeClaim(t, claim, apub)
	claim.AddMapping("foo.bar", jwt.WeightedMapping{Subject: "foo.baz"})
	jwt2 := encodeClaim(t, claim, apub)

	dirSrv := t.TempDir()

	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
    `, ojwt, spub, dirSrv)))

	s, _ := RunServerWithConfig(conf)
	defer s.Shutdown()

	type zapi struct {
		Server *ServerInfo
		Data   *Connz
		Error  *ApiError
	}

	updateJWT := func(jwt string) {
		t.Helper()
		sc := natsConnect(t, s.ClientURL(), createUserCreds(t, s, skp))
		defer sc.Close()
		resp, err := sc.Request("$SYS.REQ.CLAIMS.UPDATE", []byte(jwt), time.Second)
		if err != nil {
			t.Fatalf("Unexpected error: %v", err)
		}
		var cz zapi
		if err := json.Unmarshal(resp.Data, &cz); err != nil {
			t.Fatalf("Unexpected error: %v", err)
		}
		if cz.Error != nil {
			t.Fatalf("Unexpected error: %+v", cz.Error)
		}
	}

	updateJWT(jwt1)

	nc := natsConnect(t, s.ClientURL(), createUserCreds(t, s, akp))
	defer nc.Close()

	doRequest := func() {
		t.Helper()
		resp, err := nc.Request("$SYS.REQ.SERVER.PING.CONNZ", nil, time.Second)
		if err != nil {
			t.Fatalf("Unexpected error: %v", err)
		}
		var cz zapi
		if err := json.Unmarshal(resp.Data, &cz); err != nil {
			t.Fatalf("Unexpected error: %v", err)
		}
		if cz.Error != nil {
			t.Fatalf("Unexpected error: %+v", cz.Error)
		}
	}

	doRequest()
	updateJWT(jwt2)
	// If we accidentally wipe the system import this will fail with no responders.
	doRequest()
	// Now test updating system account.
	updateJWT(sjwt)
	// If export was wiped this would fail with timeout.
	doRequest()
}

func TestJWTAccountWeightedMappingInSuperCluster(t *testing.T) {
	skp, spub := createKey(t)
	sysClaim := jwt.NewAccountClaims(spub)
	sysClaim.Name = "SYS"
	sysCreds := newUser(t, skp)

	akp, apub := createKey(t)
	aUsr := createUserCreds(t, nil, akp)
	claim := jwt.NewAccountClaims(apub)
	aJwtMap := encodeClaim(t, claim, apub)

	// We are using the createJetStreamSuperClusterWithTemplateAndModHook()
	// helper, but this test is not about JetStream...
	tmpl := `
		listen: 127.0.0.1:-1
		server_name: %s
		jetstream: {max_mem_store: 256MB, max_file_store: 2GB, store_dir: '%s'}
		cluster {
			name: %s
			listen: 127.0.0.1:%d
			routes = [%s]
		}
    `

	sc := createJetStreamSuperClusterWithTemplateAndModHook(t, tmpl, 3, 3,
		func(serverName, clusterName, storeDir, conf string) string {
			dirSrv := t.TempDir()
			return fmt.Sprintf(`%s
				operator: %s
				system_account: %s
				resolver: {
					type: full
					dir: '%s'
				}
			`, conf, ojwt, spub, dirSrv)
		}, nil)
	defer sc.shutdown()

	// Update from C2
	require_Len(t, 1, updateJwt(t, sc.clusterForName("C2").randomServer().ClientURL(), sysCreds, aJwtMap, 1))

	// We will connect our services in the C3 cluster.
	nc1 := natsConnect(t, sc.clusterForName("C3").randomServer().ClientURL(), aUsr)
	defer nc1.Close()
	nc2 := natsConnect(t, sc.clusterForName("C3").randomServer().ClientURL(), aUsr)
	defer nc2.Close()

	natsSub(t, nc1, "foo", func(m *nats.Msg) {
		m.Respond([]byte("foo"))
	})
	natsSub(t, nc1, "bar.v1", func(m *nats.Msg) {
		m.Respond([]byte("v1"))
	})
	natsSub(t, nc2, "bar.v2", func(m *nats.Msg) {
		m.Respond([]byte("v2"))
	})
	natsFlush(t, nc1)
	natsFlush(t, nc2)

	// Now we will update the account to add weighted subject mapping
	claim.Mappings = map[jwt.Subject][]jwt.WeightedMapping{}
	// Start with foo->bar.v2 at 40%, the server will auto-add foo->foo at 60%.
	wm := []jwt.WeightedMapping{{Subject: "bar.v2", Weight: 40}}
	claim.AddMapping("foo", wm...)
	aJwtMap = encodeClaim(t, claim, apub)

	// We will update from C2
	require_Len(t, 1, updateJwt(t, sc.clusterForName("C2").randomServer().ClientURL(), sysCreds, aJwtMap, 1))

	time.Sleep(time.Second)

	// And we will publish from C1
	nc := natsConnect(t, sc.clusterForName("C1").randomServer().ClientURL(), aUsr)
	defer nc.Close()

	var foo, v1, v2 int
	pubAndCount := func() {
		for i := 0; i < 1000; i++ {
			msg, err := nc.Request("foo", []byte("req"), 500*time.Millisecond)
			if err != nil {
				continue
			}
			switch string(msg.Data) {
			case "foo":
				foo++
			case "v1":
				v1++
			case "v2":
				v2++
			}
		}
	}
	pubAndCount()
	if foo < 550 || foo > 650 {
		t.Fatalf("Expected foo to receive 60%%, got %v/1000", foo)
	}
	if v1 != 0 {
		t.Fatalf("Expected v1 to receive no message, got %v/1000", v1)
	}
	if v2 < 350 || v2 > 450 {
		t.Fatalf("Expected v2 to receive 40%%, got %v/1000", v2)
	}

	// Now send a new update with foo-> bar.v2(40) and bar.v1(60).
	// The auto-add of "foo" should no longer be used by the server.
	wm = []jwt.WeightedMapping{
		{Subject: "bar.v2", Weight: 40},
		{Subject: "bar.v1", Weight: 60},
	}
	claim.AddMapping("foo", wm...)
	aJwtMap = encodeClaim(t, claim, apub)

	// We will update from C2
	require_Len(t, 1, updateJwt(t, sc.clusterForName("C2").randomServer().ClientURL(), sysCreds, aJwtMap, 1))

	time.Sleep(time.Second)

	foo, v1, v2 = 0, 0, 0
	pubAndCount()
	if foo != 0 {
		t.Fatalf("Expected foo to receive no message, got %v/1000", foo)
	}
	if v1 < 550 || v1 > 650 {
		t.Fatalf("Expected v1 to receive 60%%, got %v/1000", v1)
	}
	if v2 < 350 || v2 > 450 {
		t.Fatalf("Expected v2 to receive 40%%, got %v/1000", v2)
	}
}

func TestJWTServerOperatorModeNoAuthRequired(t *testing.T) {
	_, spub := createKey(t)
	sysClaim := jwt.NewAccountClaims(spub)
	sysClaim.Name = "$SYS"
	sysJwt, err := sysClaim.Encode(oKp)
	require_NoError(t, err)

	akp, apub := createKey(t)
	accClaim := jwt.NewAccountClaims(apub)
	accClaim.Name = "TEST"
	accJwt, err := accClaim.Encode(oKp)
	require_NoError(t, err)

	ukp, _ := nkeys.CreateUser()
	seed, _ := ukp.Seed()
	upub, _ := ukp.PublicKey()
	nuc := jwt.NewUserClaims(upub)
	ujwt, err := nuc.Encode(akp)
	require_NoError(t, err)
	creds := genCredsFile(t, ujwt, seed)

	dirSrv := t.TempDir()

	conf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-A
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			interval: "200ms"
			limit: 4
		}
		resolver_preload: {
			%s: %s
			%s: %s
		}
    `, ojwt, spub, dirSrv, spub, sysJwt, apub, accJwt)))

	s, _ := RunServerWithConfig(conf)
	defer s.Shutdown()

	nc := natsConnect(t, s.ClientURL(), nats.UserCredentials(creds))
	defer nc.Close()

	require_True(t, nc.AuthRequired())
}

func TestJWTServerOperatorModeUserInfoExpiration(t *testing.T) {
	_, spub := createKey(t)
	sysClaim := jwt.NewAccountClaims(spub)
	sysClaim.Name = "$SYS"
	sysJwt, err := sysClaim.Encode(oKp)
	require_NoError(t, err)

	akp, apub := createKey(t)
	accClaim := jwt.NewAccountClaims(apub)
	accClaim.Name = "TEST"
	accJwt, err := accClaim.Encode(oKp)
	require_NoError(t, err)

	conf := createConfFile(t, []byte(fmt.Sprintf(`
				listen: 127.0.0.1:-1
				operator: %s
				system_account: %s
				resolver: MEM
				resolver_preload: {
					%s: %s
					%s: %s
				}
			`, ojwt, spub, apub, accJwt, spub, sysJwt)))
	defer removeFile(t, conf)

	s, _ := RunServerWithConfig(conf)
	defer s.Shutdown()

	expires := time.Now().Add(time.Minute)
	creds := createUserWithLimit(t, akp, expires, func(j *jwt.UserPermissionLimits) {})

	nc := natsConnect(t, s.ClientURL(), nats.UserCredentials(creds))
	defer nc.Close()

	resp, err := nc.Request("$SYS.REQ.USER.INFO", nil, time.Second)
	require_NoError(t, err)
	now := time.Now()

	response := ServerAPIResponse{Data: &UserInfo{}}
	err = json.Unmarshal(resp.Data, &response)
	require_NoError(t, err)

	userInfo := response.Data.(*UserInfo)
	require_True(t, userInfo.Expires != 0)

	// We need to round the expiration time to the second because the server
	// will truncate the expiration time to the second.
	expiresDurRounded := expires.Sub(now).Truncate(time.Second)

	// Checking range to avoid flaky tests where the expiration time is
	// off by a couple of seconds.
	require_True(t, expiresDurRounded >= userInfo.Expires-2*time.Second && expiresDurRounded <= userInfo.Expires+2*time.Second)
}

func TestJWTAccountNATSResolverWrongCreds(t *testing.T) {
	require_NoLocalOrRemoteConnections := func(account string, srvs ...*Server) {
		t.Helper()
		for _, srv := range srvs {
			if acc, ok := srv.accounts.Load(account); ok {
				checkAccClientsCount(t, acc.(*Account), 0)
			}
		}
	}
	connect := func(url string, credsfile string, acc string, srvs ...*Server) {
		t.Helper()
		nc := natsConnect(t, url, nats.UserCredentials(credsfile), nats.Timeout(5*time.Second))
		nc.Close()
		require_NoLocalOrRemoteConnections(acc, srvs...)
	}
	createAccountAndUser := func(pubKey, jwt1, jwt2, creds *string) {
		t.Helper()
		kp, _ := nkeys.CreateAccount()
		*pubKey, _ = kp.PublicKey()
		claim := jwt.NewAccountClaims(*pubKey)
		var err error
		*jwt1, err = claim.Encode(oKp)
		require_NoError(t, err)
		*jwt2, err = claim.Encode(oKp)
		require_NoError(t, err)
		ukp, _ := nkeys.CreateUser()
		seed, _ := ukp.Seed()
		upub, _ := ukp.PublicKey()
		uclaim := newJWTTestUserClaims()
		uclaim.Subject = upub
		ujwt, err := uclaim.Encode(kp)
		require_NoError(t, err)
		*creds = genCredsFile(t, ujwt, seed)
	}
	// Create Accounts and corresponding user creds.
	var syspub, sysjwt, dummy1, sysCreds string
	createAccountAndUser(&syspub, &sysjwt, &dummy1, &sysCreds)

	var apub, ajwt1, ajwt2, aCreds string
	createAccountAndUser(&apub, &ajwt1, &ajwt2, &aCreds)

	var bpub, bjwt1, bjwt2, bCreds string
	createAccountAndUser(&bpub, &bjwt1, &bjwt2, &bCreds)

	// The one that is going to be missing.
	var cpub, cjwt1, cjwt2, cCreds string
	createAccountAndUser(&cpub, &cjwt1, &cjwt2, &cCreds)
	// Create one directory for each server
	dirA := t.TempDir()
	dirB := t.TempDir()
	dirC := t.TempDir()

	// Store accounts on servers A and B, then let C sync on its own.
	writeJWT(t, dirA, apub, ajwt1)
	writeJWT(t, dirB, bpub, bjwt1)

	/////////////////////////////////////////
	//                                     //
	//   Server A: has creds from client A //
	//                                     //
	/////////////////////////////////////////
	confA := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-A
		operator: %s
		system_account: %s
                debug: true
		resolver: {
			type: full
			dir: '%s'
			allow_delete: true
			timeout: "1.5s"
			interval: "200ms"
		}
		resolver_preload: {
			%s: %s
		}
		cluster {
			name: clust
			listen: 127.0.0.1:-1
			no_advertise: true
		}
       `, ojwt, syspub, dirA, apub, ajwt1)))
	sA, _ := RunServerWithConfig(confA)
	defer sA.Shutdown()
	require_JWTPresent(t, dirA, apub)

	/////////////////////////////////////////
	//                                     //
	//   Server B: has creds from client B //
	//                                     //
	/////////////////////////////////////////
	confB := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: srv-B
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			allow_delete: true
			timeout: "1.5s"
			interval: "200ms"
		}
		cluster {
			name: clust
			listen: 127.0.0.1:-1
			no_advertise: true
			routes [
				nats-route://127.0.0.1:%d
			]
		}
        `, ojwt, syspub, dirB, sA.opts.Cluster.Port)))
	sB, _ := RunServerWithConfig(confB)
	defer sB.Shutdown()

	/////////////////////////////////////////
	//                                     //
	//   Server C: has no creds            //
	//                                     //
	/////////////////////////////////////////
	fmtC := `
		listen: 127.0.0.1:-1
		server_name: srv-C
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
			allow_delete: true
			timeout: "1.5s"
			interval: "200ms"
		}
		cluster {
			name: clust
			listen: 127.0.0.1:-1
			no_advertise: true
			routes [
				nats-route://127.0.0.1:%d
			]
		}
    `
	confClongTTL := createConfFile(t, []byte(fmt.Sprintf(fmtC, ojwt, syspub, dirC, sA.opts.Cluster.Port)))
	sC, _ := RunServerWithConfig(confClongTTL) // use long ttl to assure it is not kicking
	defer sC.Shutdown()

	// startup cluster
	checkClusterFormed(t, sA, sB, sC)
	time.Sleep(1 * time.Second) // wait for the protocol to converge
	// // Check all accounts
	require_JWTPresent(t, dirA, apub) // was already present on startup
	require_JWTPresent(t, dirB, apub) // was copied from server A
	require_JWTPresent(t, dirA, bpub) // was copied from server B
	require_JWTPresent(t, dirB, bpub) // was already present on startup

	// There should be no state about the missing account.
	require_JWTAbsent(t, dirA, cpub)
	require_JWTAbsent(t, dirB, cpub)
	require_JWTAbsent(t, dirC, cpub)

	// system account client can connect to every server
	connect(sA.ClientURL(), sysCreds, "")
	connect(sB.ClientURL(), sysCreds, "")
	connect(sC.ClientURL(), sysCreds, "")

	// A and B clients can connect to any server.
	connect(sA.ClientURL(), aCreds, "")
	connect(sB.ClientURL(), aCreds, "")
	connect(sC.ClientURL(), aCreds, "")
	connect(sA.ClientURL(), bCreds, "")
	connect(sB.ClientURL(), bCreds, "")
	connect(sC.ClientURL(), bCreds, "")

	// Check that trying to connect with bad credentials should not hang until the fetch timeout
	// and instead return a faster response when an account is not found.
	_, err := nats.Connect(sC.ClientURL(), nats.UserCredentials(cCreds), nats.Timeout(500*time.Second))
	if err != nil && !errors.Is(err, nats.ErrAuthorization) {
		t.Fatalf("Expected auth error: %v", err)
	}
}

// Issue 5480: https://github.com/nats-io/nats-server/issues/5480
func TestJWTImportsOnServerRestartAndClientsReconnect(t *testing.T) {
	type namedCreds struct {
		name  string
		creds nats.Option
	}
	preload := make(map[string]string)
	users := make(map[string]*namedCreds)

	// sys account
	_, sysAcc, sysAccClaim := NewJwtAccountClaim("sys")
	sysAccJWT, err := sysAccClaim.Encode(oKp)
	require_NoError(t, err)
	preload[sysAcc] = sysAccJWT

	// main account, other accounts will import from this.
	mainAccKP, mainAcc, mainAccClaim := NewJwtAccountClaim("main")
	mainAccClaim.Exports.Add(&jwt.Export{
		Type:    jwt.Stream,
		Subject: "city.>",
	})

	// main account user
	mainUserClaim := jwt.NewUserClaims("publisher")
	mainUserClaim.Permissions = jwt.Permissions{
		Pub: jwt.Permission{
			Allow: []string{"city.>"},
		},
	}
	mainCreds := createUserCredsEx(t, mainUserClaim, mainAccKP)

	// The main account will be importing from all other accounts.
	maxAccounts := 100
	for i := 0; i < maxAccounts; i++ {
		name := fmt.Sprintf("secondary-%d", i)
		accKP, acc, accClaim := NewJwtAccountClaim(name)

		accClaim.Exports.Add(&jwt.Export{
			Type:    jwt.Stream,
			Subject: "internal.*",
		})
		accClaim.Imports.Add(&jwt.Import{
			Type:    jwt.Stream,
			Subject: jwt.Subject(fmt.Sprintf("city.%d-1.*", i)),
			Account: mainAcc,
		})

		// main account imports from the secondary accounts
		mainAccClaim.Imports.Add(&jwt.Import{
			Type:    jwt.Stream,
			Subject: jwt.Subject(fmt.Sprintf("internal.%d", i)),
			Account: acc,
		})

		accJWT, err := accClaim.Encode(oKp)
		require_NoError(t, err)
		preload[acc] = accJWT

		userClaim := jwt.NewUserClaims("subscriber")
		userClaim.Permissions = jwt.Permissions{
			Sub: jwt.Permission{
				Allow: []string{"city.>", "internal.*"},
			},
			Pub: jwt.Permission{
				Allow: []string{"internal.*"},
			},
		}
		userCreds := createUserCredsEx(t, userClaim, accKP)
		users[acc] = &namedCreds{name, userCreds}
	}
	mainAccJWT, err := mainAccClaim.Encode(oKp)
	require_NoError(t, err)
	preload[mainAcc] = mainAccJWT

	// Start the server with the preload.
	resolverPreload, err := json.Marshal(preload)
	require_NoError(t, err)
	conf := createConfFile(t, []byte(fmt.Sprintf(`
            listen: 127.0.0.1:4747
            http: 127.0.0.1:8222
            operator: %s
            system_account: %s
            resolver: MEM
            resolver_preload: %s
	`, ojwt, sysAcc, string(resolverPreload))))
	s, _ := RunServerWithConfig(conf)
	defer s.Shutdown()

	// Have a connection ready for each one of the accounts.
	type namedSub struct {
		name string
		sub  *nats.Subscription
	}
	subs := make(map[string]*namedSub)
	for acc, user := range users {
		nc := natsConnect(t, s.ClientURL(), user.creds,
			// Make the clients attempt to reconnect too fast,
			// changing this to be above ~200ms mitigates the issue.
			nats.ReconnectWait(15*time.Millisecond),
			nats.Name(user.name),
			nats.MaxReconnects(-1),
		)
		defer nc.Close()

		sub, err := nc.SubscribeSync("city.>")
		require_NoError(t, err)
		subs[acc] = &namedSub{user.name, sub}
	}

	nc := natsConnect(t, s.ClientURL(), mainCreds, nats.ReconnectWait(15*time.Millisecond), nats.MaxReconnects(-1))
	defer nc.Close()

	send := func(t *testing.T) {
		t.Helper()
		for i := 0; i < maxAccounts; i++ {
			nc.Publish(fmt.Sprintf("city.%d-1.A4BDB048-69DC-4F10-916C-2B998249DC11", i), []byte(fmt.Sprintf("test:%d", i)))
		}
		nc.Flush()
	}

	ctx, done := context.WithCancel(context.Background())
	defer done()
	go func() {
		for range time.NewTicker(200 * time.Millisecond).C {
			select {
			case <-ctx.Done():
				return
			default:
			}
			send(t)
		}
	}()

	receive := func(t *testing.T) {
		t.Helper()
		received := 0
		for _, nsub := range subs {
			// Drain first any pending messages.
			pendingMsgs, _, _ := nsub.sub.Pending()
			for i, _ := 0, 0; i < pendingMsgs; i++ {
				nsub.sub.NextMsg(500 * time.Millisecond)
			}

			_, err = nsub.sub.NextMsg(500 * time.Millisecond)
			if err != nil {
				t.Logf("WRN: Failed to receive message on account %q: %v", nsub.name, err)
			} else {
				received++
			}
		}
		if received < (maxAccounts / 2) {
			t.Fatalf("Too many missed messages after restart. Received %d", received)
		}
	}
	receive(t)
	time.Sleep(1 * time.Second)

	restart := func(t *testing.T) *Server {
		t.Helper()
		s.Shutdown()
		s.WaitForShutdown()
		s, _ = RunServerWithConfig(conf)

		hctx, hcancel := context.WithTimeout(context.Background(), 5*time.Second)
		defer hcancel()
		for range time.NewTicker(2 * time.Second).C {
			select {
			case <-hctx.Done():
				t.Logf("WRN: Timed out waiting for healthz from %s", s)
			default:
			}

			status := s.healthz(nil)
			if status.StatusCode == 200 {
				return s
			}
		}
		return nil
	}

	// Takes a few restarts for issue to show up.
	for i := 0; i < 5; i++ {
		s := restart(t)
		defer s.Shutdown()
		time.Sleep(2 * time.Second)
		receive(t)
	}
}

func TestDefaultSentinelUser(t *testing.T) {
	var err error
	preload := make(map[string]string)

	_, sysPub, sysAC := NewJwtAccountClaim("SYS")
	preload[sysPub], err = sysAC.Encode(oKp)
	require_NoError(t, err)

	aKP, aPub, aAC := NewJwtAccountClaim("A")
	aScopedKP, err := nkeys.CreateAccount()
	require_NoError(t, err)
	aScopedPK, err := aScopedKP.PublicKey()
	require_NoError(t, err)

	sentinelScope := jwt.NewUserScope()
	sentinelScope.Key = aScopedPK
	sentinelScope.Role = "sentinel"
	sentinelScope.Description = "Sentinel Role"
	sentinelScope.Template = jwt.UserPermissionLimits{
		BearerToken: true,
		Permissions: jwt.Permissions{
			Pub: jwt.Permission{Deny: []string{">"}},
			Sub: jwt.Permission{Deny: []string{">"}},
		},
	}
	aAC.SigningKeys.AddScopedSigner(sentinelScope)

	preload[aPub], err = aAC.Encode(oKp)
	require_NoError(t, err)

	preloadConfig, err := json.MarshalIndent(preload, "", " ")
	require_NoError(t, err)

	// test that the user will be rejected
	conf := createConfFile(t, []byte(fmt.Sprintf(`
            listen: 127.0.0.1:4747
            operator: %s
            system_account: %s
            resolver: MEM
            resolver_preload: %s
`, ojwt, sysPub, preloadConfig)))

	ns, _ := RunServerWithConfig(conf)
	defer ns.Shutdown()
	_, err = nats.Connect(ns.ClientURL(), nats.MaxReconnects(0))
	require_Error(t, err)
	require_True(t, errors.Is(err, nats.ErrAuthorization))
	ns.Shutdown()

	// test that user can connect
	uKP, err := nkeys.CreateUser()
	require_NoError(t, err)
	uPub, err := uKP.PublicKey()
	require_NoError(t, err)
	uc := jwt.NewUserClaims(uPub)
	uc.BearerToken = false
	uc.Name = "sentinel"
	sentinelToken, err := uc.Encode(aKP)
	require_NoError(t, err)
	conf = createConfFile(t, []byte(fmt.Sprintf(`
            listen: 127.0.0.1:4747
            operator: %s
            system_account: %s
            resolver: MEM
            resolver_preload: %s
			default_sentinel: %s
`, ojwt, sysPub, preloadConfig, sentinelToken)))

	// test non-bearer sentinel is rejected
	opts, err := ProcessConfigFile(conf)
	require_NoError(t, err)
	_, err = NewServer(opts)
	require_Error(t, err, fmt.Errorf("default sentinel must be a bearer token"))

	// correct and start server
	uc.BearerToken = true
	sentinelToken, err = uc.Encode(aKP)
	require_NoError(t, err)
	conf = createConfFile(t, []byte(fmt.Sprintf(`
            listen: 127.0.0.1:4747
            operator: %s
            system_account: %s
            resolver: MEM
            resolver_preload: %s
			default_sentinel: %s
`, ojwt, sysPub, preloadConfig, sentinelToken)))

	ns, _ = RunServerWithConfig(conf)
	nc, err := nats.Connect(ns.ClientURL())
	require_NoError(t, err)
	defer nc.Close()

	r, err := nc.Request("$SYS.REQ.USER.INFO", nil, time.Second*5)
	require_NoError(t, err)
	type SR struct {
		Data UserInfo `json:"data"`
	}
	var ui SR
	require_NoError(t, json.Unmarshal(r.Data, &ui))
	require_Equal(t, ui.Data.UserID, uPub)
	ns.Shutdown()

	// now lets make a sentinel that is a scoped user with bearer token
	uc = jwt.NewUserClaims(uPub)
	uc.IssuerAccount = aPub
	uc.UserPermissionLimits = jwt.UserPermissionLimits{}

	sentinelToken, err = uc.Encode(aScopedKP)
	require_NoError(t, err)
	conf = createConfFile(t, []byte(fmt.Sprintf(`
            listen: 127.0.0.1:4747
            operator: %s
            system_account: %s
            resolver: MEM
            resolver_preload: %s
			default_sentinel: %s
`, ojwt, sysPub, preloadConfig, sentinelToken)))
	ns, _ = RunServerWithConfig(conf)
	defer ns.Shutdown()
	nc, err = nats.Connect(ns.ClientURL())
	require_NoError(t, err)
	defer nc.Close()

}

func TestJWTUpdateAccountClaimsStreamAndServiceImportDeadlock(t *testing.T) {
	for _, exportType := range []jwt.ExportType{jwt.Stream, jwt.Service} {
		t.Run(exportType.String(), func(t *testing.T) {
			s := opTrustBasicSetup()
			defer s.Shutdown()
			buildMemAccResolver(s)

			// Get operator.
			okp, err := nkeys.FromSeed(oSeed)
			require_NoError(t, err)

			type Acc struct {
				pub string
				ac  *jwt.AccountClaims
				a   *Account
				c   *client
			}

			// Create accounts.
			var accs []*Acc
			numAccounts := 10
			for i := 0; i < numAccounts; i++ {
				aKp, err := nkeys.CreateAccount()
				require_NoError(t, err)
				aPub, err := aKp.PublicKey()
				require_NoError(t, err)
				aAC := jwt.NewAccountClaims(aPub)
				aJWT, err := aAC.Encode(okp)
				require_NoError(t, err)
				addAccountToMemResolver(s, aPub, aJWT)

				aAcc, err := s.LookupAccount(aPub)
				require_NoError(t, err)

				aAcc.mu.Lock()
				c := aAcc.internalClient()
				aAcc.mu.Unlock()
				aAcc.addClient(c)

				accs = append(accs, &Acc{aPub, aAC, aAcc, c})
			}

			addImportExport := func(i int, acc *Acc) {
				localSubject := fmt.Sprintf("%s.%d", acc.pub, i)
				acc.ac.Exports.Add(&jwt.Export{Subject: jwt.Subject(localSubject), Type: exportType})
				for _, oAcc := range accs {
					if acc.pub == oAcc.pub {
						continue
					}
					externalSubject := fmt.Sprintf("%s.%d", oAcc.pub, i)
					acc.ac.Imports.Add(&jwt.Import{Account: oAcc.pub, Subject: jwt.Subject(externalSubject), Type: exportType})
				}
			}
			test := func(i int) {
				var start sync.WaitGroup
				var release sync.WaitGroup
				var finish sync.WaitGroup
				start.Add(numAccounts)
				release.Add(1)
				finish.Add(numAccounts)

				// Add imports/exports to both accounts and update in parallel, should not deadlock.
				for _, acc := range accs {
					acc := acc
					go func() {
						defer finish.Done()
						addImportExport(i, acc)
						jwt, err := acc.ac.Encode(okp)
						addAccountToMemResolver(s, acc.pub, jwt)
						start.Done()
						require_NoError(t, err)

						release.Wait()
						s.UpdateAccountClaims(acc.a, acc.ac)
					}()
				}

				start.Wait()

				// Lock all clients, once we release below we'll get all claim updates
				// in the same place after initial checks.
				for _, acc := range accs {
					acc.c.mu.Lock()
				}
				release.Done()

				// Wait some time for them to reach that point and be blocked on the client lock.
				time.Sleep(time.Second)
				for _, acc := range accs {
					acc.c.mu.Unlock()
				}

				// Eventually all goroutines should finish.
				finish.Wait()
			}

			// Repeat test multiple times, increasing the amount of imports/exports along the way.
			for i := 0; i < 30; i++ {
				test(i)
			}
		})
	}
}

func TestJWTJetStreamClientsExcludedForMaxConnsUpdate(t *testing.T) {
	sysKp, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)
	sysCreds := newUser(t, sysKp)

	accKp, accPub := createKey(t)
	accClaim := jwt.NewAccountClaims(accPub)
	accClaim.Name = "acc"
	accClaim.Limits.JetStreamTieredLimits["R1"] = jwt.JetStreamLimits{
		DiskStorage: 1100, MemoryStorage: 0, Consumer: 2, Streams: 2}
	accClaim.Limits.Conn = 5
	accJwt1 := encodeClaim(t, accClaim, accPub)
	accCreds := newUser(t, accKp)

	storeDir := t.TempDir()

	dirSrv := t.TempDir()
	cf := createConfFile(t, []byte(fmt.Sprintf(`
		listen: 127.0.0.1:-1
		server_name: s1
		jetstream: {max_mem_store: 256MB, max_file_store: 2GB, store_dir: '%s'}
		leaf {
			listen: 127.0.0.1:-1
		}
		operator: %s
		system_account: %s
		resolver: {
			type: full
			dir: '%s'
		}
	`, storeDir, ojwt, syspub, dirSrv)))

	s, _ := RunServerWithConfig(cf)
	defer s.Shutdown()

	updateJwt(t, s.ClientURL(), sysCreds, sysJwt, 1)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt1, 1)

	nc, js := jsClientConnectURL(t, s.ClientURL(), nats.UserCredentials(accCreds))
	defer nc.Close()

	_, err := js.AddStream(&nats.StreamConfig{Name: "TEST", Replicas: 1, Subjects: []string{"foo"}})
	require_NoError(t, err)

	_, err = js.Publish("foo", nil)
	require_NoError(t, err)

	accClaim.Limits.Conn = 1
	accJwt1 = encodeClaim(t, accClaim, accPub)
	updateJwt(t, s.ClientURL(), sysCreds, accJwt1, 1)

	// Manually reconnect.
	nc.Close()
	nc, js = jsClientConnectURL(t, s.ClientURL(), nats.UserCredentials(accCreds))
	defer nc.Close()

	_, err = js.Publish("foo", nil)
	require_NoError(t, err)
}

func TestJWTClusterUserInfoContainsPermissions(t *testing.T) {
	tmpl := `
			listen: 127.0.0.1:-1
			server_name: %s
			jetstream: {max_mem_store: 256MB, max_file_store: 2GB, store_dir: '%s'}
			cluster {
				name: %s
				listen: 127.0.0.1:%d
				routes = [%s]
			}
	`
	opFrag := `
			operator: %s
			system_account: %s
			resolver: { type: MEM }
			resolver_preload = {
				%s : %s
				%s : %s
			}
		`

	_, syspub := createKey(t)
	sysJwt := encodeClaim(t, jwt.NewAccountClaims(syspub), syspub)

	accKp, aExpPub := createKey(t)
	accClaim := jwt.NewAccountClaims(aExpPub)
	accClaim.DefaultPermissions.Sub = jwt.Permission{
		Deny: []string{"foo"},
	}
	accJwt := encodeClaim(t, accClaim, aExpPub)
	accCreds := newUser(t, accKp)

	template := tmpl + fmt.Sprintf(opFrag, ojwt, syspub, syspub, sysJwt, aExpPub, accJwt)
	c := createJetStreamClusterWithTemplate(t, template, "R3S", 3)
	defer c.shutdown()

	// Since it's a bit of a race whether the local server responds via the
	// service import before a remote server does, we need to keep trying.
	// In 1000 attempts it is quite easy to reproduce the problem.
	test := func() {
		nc, _ := jsClientConnect(t, c.randomServer(), nats.UserCredentials(accCreds))
		defer nc.Close()

		resp, err := nc.Request(userDirectInfoSubj, nil, time.Second)
		require_NoError(t, err)

		response := ServerAPIResponse{Data: &UserInfo{}}
		require_NoError(t, json.Unmarshal(resp.Data, &response))

		userInfo := response.Data.(*UserInfo)
		require_NotNil(t, userInfo.Permissions)
	}
	for range 1000 {
		test()
	}
}

func TestJWTAccountLimitsOverflowInt32(t *testing.T) {
	// Without clamping, int32 truncation of values > MaxInt32 causes:
	// - mleafs/mconns wrapping to negative, triggering panics in
	//   updateRemoteServer (slice bounds out of range) and rejecting
	//   all connections.
	fooAC := newJWTTestAccountClaims()
	fooAC.Limits.Conn = math.MaxInt32 + 1
	fooAC.Limits.LeafNodeConn = math.MaxInt32 + 1
	fooAC.Limits.Subs = math.MaxInt32 + 1
	fooAC.Limits.Payload = math.MaxInt32 + 1

	s, fooKP, c, _ := setupJWTTestWitAccountClaims(t, fooAC, "+OK")
	defer s.Shutdown()
	defer c.close()

	fooPub, _ := fooKP.PublicKey()
	fooAcc, _ := s.LookupAccount(fooPub)
	fooAcc.mu.RLock()
	mconns := fooAcc.mconns
	mleafs := fooAcc.mleafs
	msubs := fooAcc.msubs
	mpay := fooAcc.mpay
	fooAcc.mu.RUnlock()

	// All account limits should be clamped to math.MaxInt32.
	if mconns != math.MaxInt32 {
		t.Fatalf("Expected account mconns to be MaxInt32 (%d), got %d", math.MaxInt32, mconns)
	}
	if mleafs != math.MaxInt32 {
		t.Fatalf("Expected account mleafs to be MaxInt32 (%d), got %d", math.MaxInt32, mleafs)
	}
	if msubs != math.MaxInt32 {
		t.Fatalf("Expected account msubs to be MaxInt32 (%d), got %d", math.MaxInt32, msubs)
	}
	if mpay != math.MaxInt32 {
		t.Fatalf("Expected account mpay to be MaxInt32 (%d), got %d", math.MaxInt32, mpay)
	}

	// Simulate a remote server update — without clamping this panics with:
	//   panic: runtime error: slice bounds out of range [2147483648:0]
	clients := fooAcc.updateRemoteServer(&AccountNumConns{
		Server: ServerInfo{
			ID:   "fake-server-1",
			Name: "fake-nats-1",
		},
		AccountStat: AccountStat{
			Account:   fooPub,
			Conns:     1,
			LeafNodes: 1,
		},
	})
	if len(clients) != 0 {
		t.Fatalf("Expected no clients to disconnect, got %d", len(clients))
	}
}

func TestJWTUserLimitsOverflowInt32SubPub(t *testing.T) {
	t.Run("Subs", func(t *testing.T) {
		nuc := newJWTTestUserClaims()
		// Without clamping, int32(math.MaxInt32+1) wraps to MinInt32,
		// making subsAtLimit() always true and blocking all subscriptions.
		nuc.Limits.Subs = math.MaxInt32 + 1
		s, c, cr := setupJWTTestWithUserClaims(t, nuc, "+OK")
		defer s.Shutdown()
		defer c.close()

		expectPong(t, cr)

		// With clamping, subscriptions should succeed.
		// Before, this would have been `-ERR 'maximum subscriptions exceeded`
		c.parseAsync("SUB foo 1\r\nPING\r\n")
		l, _ := cr.ReadString('\n')
		if !strings.HasPrefix(l, "+OK") {
			t.Fatalf("Expected +OK, got %q", l)
		}
	})

	t.Run("Payload", func(t *testing.T) {
		nuc := newJWTTestUserClaims()
		// Without clamping, int32(math.MaxInt32+1) wraps to MinInt32,
		// making int64(size) > int64(negative) always true and rejecting
		// all publishes and closing the connection.
		nuc.Limits.Payload = math.MaxInt32 + 1
		s, c, cr := setupJWTTestWithUserClaims(t, nuc, "+OK")
		defer s.Shutdown()
		defer c.close()

		expectPong(t, cr)

		// With clamping, publish should succeed.
		// Before, this would have caused `-ERR 'Maximum Payload Violation'`
		// then disconnect the client.
		c.parseAsync("PUB baz 5\r\nhello\r\nPING\r\n")
		l, _ := cr.ReadString('\n')
		if !strings.HasPrefix(l, "+OK") {
			t.Fatalf("Expected +OK, got %q", l)
		}
	})

	t.Run("ScopedSigningKey", func(t *testing.T) {
		// Without clamping in the scoped signing key path (client.go
		// userScope.Template.Limits), int32 truncation of values >
		// MaxInt32 would wrap to negative and reject all subs/publishes.
		akp, _ := nkeys.CreateAccount()
		apub, _ := akp.PublicKey()
		nac := jwt.NewAccountClaims(apub)

		// Create a scoped signing key with overflow limits.
		skp, _ := nkeys.CreateAccount()
		spub, _ := skp.PublicKey()
		scope := jwt.NewUserScope()
		scope.Key = spub
		scope.Template.Limits.Subs = math.MaxInt32 + 1
		scope.Template.Limits.Payload = math.MaxInt32 + 1
		nac.SigningKeys.AddScopedSigner(scope)

		ajwt, err := nac.Encode(oKp)
		require_NoError(t, err)

		// Create user signed by the scoped signing key.
		// SetScoped(true) clears UserPermissionLimits so the
		// scope template is used instead of user claims.
		ukp, _ := nkeys.CreateUser()
		upub, _ := ukp.PublicKey()
		nuc := jwt.NewUserClaims(upub)
		nuc.IssuerAccount = apub
		nuc.SetScoped(true)
		ujwt, err := nuc.Encode(skp)
		require_NoError(t, err)

		s := opTrustBasicSetup()
		defer s.Shutdown()
		buildMemAccResolver(s)
		addAccountToMemResolver(s, apub, ajwt)

		c, cr, l := newClientForServer(s)
		defer c.close()

		var info nonceInfo
		json.Unmarshal([]byte(l[5:]), &info)
		sigraw, _ := ukp.Sign([]byte(info.Nonce))
		sig := base64.RawURLEncoding.EncodeToString(sigraw)

		cs := fmt.Sprintf("CONNECT {\"jwt\":%q,\"sig\":\"%s\",\"verbose\":true,\"pedantic\":true}\r\nPING\r\n", ujwt, sig)
		wg := sync.WaitGroup{}
		wg.Add(1)
		go func() {
			c.parse([]byte(cs))
			wg.Done()
		}()
		l, _ = cr.ReadString('\n')
		if !strings.HasPrefix(l, "+OK") {
			t.Fatalf("Expected +OK on CONNECT, got %q", l)
		}
		wg.Wait()
		expectPong(t, cr)

		// SUB must succeed — without clamping, msubs overflows to
		// negative and subsAtLimit() always returns true.
		c.parseAsync("SUB foo 1\r\nPING\r\n")
		l, _ = cr.ReadString('\n')
		if !strings.HasPrefix(l, "+OK") {
			t.Fatalf("Expected +OK on SUB, got %q", l)
		}
		expectPong(t, cr)

		// PUB must succeed — without clamping, mpay overflows to
		// negative and the payload check always triggers.
		c.parseAsync("PUB baz 5\r\nhello\r\nPING\r\n")
		l, _ = cr.ReadString('\n')
		if !strings.HasPrefix(l, "+OK") {
			t.Fatalf("Expected +OK on PUB, got %q", l)
		}
	})
}
