mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
8020d79b40
Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/14512)
84 lines
1.9 KiB
Plaintext
84 lines
1.9 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_MAC-GMAC - The GMAC EVP_MAC implementation
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
Support for computing GMAC MACs through the B<EVP_MAC> API.
|
|
|
|
This implementation uses EVP_CIPHER functions to get access to the underlying
|
|
cipher.
|
|
|
|
=head2 Identity
|
|
|
|
This implementation is identified with this name and properties, to be
|
|
used with EVP_MAC_fetch():
|
|
|
|
=over 4
|
|
|
|
=item "GMAC", "provider=default" or "provider=fips"
|
|
|
|
=back
|
|
|
|
=head2 Supported parameters
|
|
|
|
The general description of these parameters can be found in
|
|
L<EVP_MAC(3)/PARAMETERS>.
|
|
|
|
The following parameter can be set with EVP_MAC_CTX_set_params():
|
|
|
|
=over 4
|
|
|
|
=item "key" (B<OSSL_MAC_PARAM_KEY>) <octet string>
|
|
|
|
Sets the MAC key.
|
|
Setting this parameter is identical to passing a I<key> to L<EVP_MAC_init(3)>.
|
|
|
|
=item "iv" (B<OSSL_MAC_PARAM_IV>) <octet string>
|
|
|
|
Sets the IV of the underlying cipher, when applicable.
|
|
|
|
=item "cipher" (B<OSSL_MAC_PARAM_CIPHER>) <UTF8 string>
|
|
|
|
Sets the name of the underlying cipher to be used.
|
|
|
|
=item "properties" (B<OSSL_MAC_PARAM_PROPERTIES>) <UTF8 string>
|
|
|
|
Sets the properties to be queried when trying to fetch the underlying cipher.
|
|
This must be given together with the cipher naming parameter to be considered
|
|
valid.
|
|
|
|
=back
|
|
|
|
The following parameters can be retrieved with
|
|
EVP_MAC_CTX_get_params():
|
|
|
|
=over 4
|
|
|
|
=item "size" (B<OSSL_MAC_PARAM_SIZE>) <unsigned integer>
|
|
|
|
Gets the MAC size.
|
|
|
|
=back
|
|
|
|
The "size" parameter can also be retrieved with EVP_MAC_CTX_get_mac_size().
|
|
The length of the "size" parameter is equal to that of an B<unsigned int>.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<EVP_MAC_CTX_get_params(3)>, L<EVP_MAC_CTX_set_params(3)>,
|
|
L<EVP_MAC(3)/PARAMETERS>, L<OSSL_PARAM(3)>
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2018-2021 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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|