"""_blake2 provides BLAKE2b and BLAKE2s for hashlib"""

import sys
from _typeshed import ReadableBuffer
from typing import ClassVar, Final, final
from typing_extensions import Self

BLAKE2B_MAX_DIGEST_SIZE: Final = 64
BLAKE2B_MAX_KEY_SIZE: Final = 64
BLAKE2B_PERSON_SIZE: Final = 16
BLAKE2B_SALT_SIZE: Final = 16
BLAKE2S_MAX_DIGEST_SIZE: Final = 32
BLAKE2S_MAX_KEY_SIZE: Final = 32
BLAKE2S_PERSON_SIZE: Final = 8
BLAKE2S_SALT_SIZE: Final = 8

@final
class blake2b:
    """Return a new BLAKE2b hash object."""

    MAX_DIGEST_SIZE: ClassVar[int] = 64
    MAX_KEY_SIZE: ClassVar[int] = 64
    PERSON_SIZE: ClassVar[int] = 16
    SALT_SIZE: ClassVar[int] = 16
    block_size: int
    digest_size: int
    name: str
    if sys.version_info >= (3, 13):
        def __new__(
            cls,
            data: ReadableBuffer = b"",
            *,
            digest_size: int = 64,
            key: ReadableBuffer = b"",
            salt: ReadableBuffer = b"",
            person: ReadableBuffer = b"",
            fanout: int = 1,
            depth: int = 1,
            leaf_size: int = 0,
            node_offset: int = 0,
            node_depth: int = 0,
            inner_size: int = 0,
            last_node: bool = False,
            usedforsecurity: bool = True,
            string: ReadableBuffer | None = None,
        ) -> Self: ...
    else:
        def __new__(
            cls,
            data: ReadableBuffer = b"",
            /,
            *,
            digest_size: int = 64,
            key: ReadableBuffer = b"",
            salt: ReadableBuffer = b"",
            person: ReadableBuffer = b"",
            fanout: int = 1,
            depth: int = 1,
            leaf_size: int = 0,
            node_offset: int = 0,
            node_depth: int = 0,
            inner_size: int = 0,
            last_node: bool = False,
            usedforsecurity: bool = True,
        ) -> Self: ...

    def copy(self) -> Self:
        """Return a copy of the hash object."""

    def digest(self) -> bytes:
        """Return the digest value as a bytes object."""

    def hexdigest(self) -> str:
        """Return the digest value as a string of hexadecimal digits."""

    def update(self, data: ReadableBuffer, /) -> None:
        """Update this hash object's state with the provided bytes-like object."""

@final
class blake2s:
    """Return a new BLAKE2s hash object."""

    MAX_DIGEST_SIZE: ClassVar[int] = 32
    MAX_KEY_SIZE: ClassVar[int] = 32
    PERSON_SIZE: ClassVar[int] = 8
    SALT_SIZE: ClassVar[int] = 8
    block_size: int
    digest_size: int
    name: str
    if sys.version_info >= (3, 13):
        def __new__(
            cls,
            data: ReadableBuffer = b"",
            *,
            digest_size: int = 32,
            key: ReadableBuffer = b"",
            salt: ReadableBuffer = b"",
            person: ReadableBuffer = b"",
            fanout: int = 1,
            depth: int = 1,
            leaf_size: int = 0,
            node_offset: int = 0,
            node_depth: int = 0,
            inner_size: int = 0,
            last_node: bool = False,
            usedforsecurity: bool = True,
            string: ReadableBuffer | None = None,
        ) -> Self: ...
    else:
        def __new__(
            cls,
            data: ReadableBuffer = b"",
            /,
            *,
            digest_size: int = 32,
            key: ReadableBuffer = b"",
            salt: ReadableBuffer = b"",
            person: ReadableBuffer = b"",
            fanout: int = 1,
            depth: int = 1,
            leaf_size: int = 0,
            node_offset: int = 0,
            node_depth: int = 0,
            inner_size: int = 0,
            last_node: bool = False,
            usedforsecurity: bool = True,
        ) -> Self: ...

    def copy(self) -> Self:
        """Return a copy of the hash object."""

    def digest(self) -> bytes:
        """Return the digest value as a bytes object."""

    def hexdigest(self) -> str:
        """Return the digest value as a string of hexadecimal digits."""

    def update(self, data: ReadableBuffer, /) -> None:
        """Update this hash object's state with the provided bytes-like object."""
