EVP_PKEY_supports_digest_nid - indicate support for signature digest
#include <openssl/evp.h> int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid);
The EVP_PKEY_supports_digest_nid()
function queries whether the message digest
NID nid is supported for public key signature operations associated with key
pkey.
If the EVP_PKEY implementation does not explicitly support this method, but EVP_PKEY_get_default_digest_nid(3) returns a mandatory digest result, then only that mandatory digest will be supported.
The EVP_PKEY_supports_digest_nid()
function returns 1 if the message digest
algorithm identified by nid can be used for public key signature operations
associated with key pkey and 0 if it cannot be used. It returns a negative
value for failure. In particular a return value of -2 indicates the query
operation is not supported by the public key algorithm.
EVP_PKEY_CTX_new(3), EVP_PKEY_get_default_digest_nid(3), EVP_PKEY_sign(3), EVP_PKEY_verify(3), EVP_PKEY_verify_recover(3),
The EVP_PKEY_supports_digest_nid()
function was added in OpenSSL 3.0.
Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (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.