EVP_PKEY_get_default_digest(3)

NAME
EVP_PKEY_get_default_digest_nid - get default signature digest

LIBRARY
libcrypto, -lcrypto

SYNOPSIS
 #include <openssl/evp.h>
 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);

DESCRIPTION
The EVP_PKEY_get_default_digest_nid() function sets pnid to the default message digest NID for the public key signature operations associated with key pkey.

NOTES
For all current standard OpenSSL public key algorithms SHA1 is returned.

RETURN VALUES
The EVP_PKEY_get_default_digest_nid() function returns 1 if the message digest is advisory (that is other digests can be used) and 2 if it is mandatory (other digests can not be used). It returns 0 or a negative value for failure. In particular a return value of -2 indicates the operation is not supported by the public key algorithm.

SEE ALSO
EVP_PKEY_CTX_new(3), EVP_PKEY_sign(3), EVP_PKEY_verify(3), EVP_PKEY_verify_recover(3),

HISTORY
This function was first added to OpenSSL 1.0.0.