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.
HISTORY¶
This function was first added to OpenSSL 1.0.0.
COPYRIGHT¶
Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You
may not use this file except in compliance with the License. You can obtain
a copy in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.