EVP_PKEY_digestsign_supports_digest - indicate support for signature digest
 #include <openssl/evp.h>
 int EVP_PKEY_digestsign_supports_digest(EVP_PKEY *pkey, OSSL_LIB_CTX *libctx,
                                         const char *name, const char *propq);
The EVP_PKEY_digestsign_supports_digest() function queries whether the
  message digest name is supported for public key signature operations
  associated with key pkey. The query is done within an optional library
  context libctx and with an optional property query propq.
The EVP_PKEY_digestsign_supports_digest() function returns 1 if the
  message digest algorithm identified by name 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.
EVP_DigestSignInit_ex(3),
The EVP_PKEY_digestsign_supports_digest() function was added in OpenSSL
  3.0.
Copyright 2021 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>.