1=pod 2 3=head1 NAME 4 5EVP_PKEY_digestsign_supports_digest - indicate support for signature digest 6 7=head1 SYNOPSIS 8 9 #include <openssl/evp.h> 10 int EVP_PKEY_digestsign_supports_digest(EVP_PKEY *pkey, OSSL_LIB_CTX *libctx, 11 const char *name, const char *propq); 12 13=head1 DESCRIPTION 14 15The EVP_PKEY_digestsign_supports_digest() function queries whether the message 16digest I<name> is supported for public key signature operations associated with 17key I<pkey>. The query is done within an optional library context I<libctx> and 18with an optional property query I<propq>. 19 20=head1 RETURN VALUES 21 22The EVP_PKEY_digestsign_supports_digest() function returns 1 if the message 23digest algorithm identified by I<name> can be used for public key signature 24operations associated with key I<pkey> and 0 if it cannot be used. It returns 25a negative value for failure. 26 27=head1 SEE ALSO 28 29L<EVP_DigestSignInit_ex(3)>, 30 31=head1 HISTORY 32 33The EVP_PKEY_digestsign_supports_digest() function was added in OpenSSL 3.0. 34 35=head1 COPYRIGHT 36 37Copyright 2021 The OpenSSL Project Authors. All Rights Reserved. 38 39Licensed under the Apache License 2.0 (the "License"). You may not use 40this file except in compliance with the License. You can obtain a copy 41in the file LICENSE in the source distribution or at 42L<https://www.openssl.org/source/license.html>. 43 44=cut 45