54 lines
1.5 KiB
INI
54 lines
1.5 KiB
INI
=pod
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=head1 NAME
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EVP_PKEY_supports_digest_nid - indicate support for signature digest
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid);
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=head1 DESCRIPTION
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The EVP_PKEY_supports_digest_nid() function queries whether the message digest
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NID B<nid> is supported for public key signature operations associated with key
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B<pkey>.
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=head1 NOTES
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If the EVP_PKEY implementation does not explicitly support this method, but
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L<EVP_PKEY_get_default_digest_nid(3)> returns a mandatory digest result, then
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only that mandatory digest will be supported.
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=head1 RETURN VALUES
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The EVP_PKEY_supports_digest_nid() function returns 1 if the message digest
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algorithm identified by B<nid> can be used for public key signature operations
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associated with key B<pkey> and 0 if it cannot be used. It returns a negative
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value for failure. In particular a return value of -2 indicates the query
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operation is not supported by the public key algorithm.
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=head1 SEE ALSO
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L<EVP_PKEY_CTX_new(3)>,
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L<EVP_PKEY_get_default_digest_nid(3)>,
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L<EVP_PKEY_sign(3)>,
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L<EVP_PKEY_verify(3)>,
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L<EVP_PKEY_verify_recover(3)>,
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=head1 HISTORY
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This function was first added to OpenSSL 1.1.2.
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=head1 COPYRIGHT
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Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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