EVP_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                            2019-09-10    EVP_PKEY_get_default_digest(3)