NAME

       EVP_PKEY_digestsign_supports_digest - indicate support for signature digest

SYNOPSIS

        #include <openssl/evp.h>
        int EVP_PKEY_digestsign_supports_digest(EVP_PKEY *pkey, OSSL_LIB_CTX *libctx,
                                                const char *name, const char *propq);

DESCRIPTION

       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.

RETURN VALUES

       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.

SEE ALSO

       EVP_DigestSignInit_ex(3),

HISTORY

       The EVP_PKEY_digestsign_supports_digest() function was added in OpenSSL 3.0.

COPYRIGHT

       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>.