/usr/man/cat.3/EVP_PKEY_get_default_digest.3(/usr/man/cat.3/EVP_PKEY_get_default_digest.3)

EVP_PKEY_get_default_digest(3OpenSSEVP_PKEY_get_default_digest(3)

NAME

     EVP_PKEY_get_default_digest_nid - get default signature
     digest

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.

1.0.2t               Last change: 2019-09-10                    1