1=pod 2 3=head1 NAME 4 5EVP_SIGNATURE-HMAC, EVP_SIGNATURE-Siphash, EVP_SIGNATURE-Poly1305, 6EVP_SIGNATURE-CMAC 7- The legacy B<EVP_PKEY> MAC signature implementations 8 9=head1 DESCRIPTION 10 11The algorithms described here have legacy support for creating MACs using 12L<EVP_DigestSignInit(3)> and related functions. This is not the preferred way of 13creating MACs. Instead you should use the newer L<EVP_MAC_init(3)> functions. 14This mechanism is provided for backwards compatibility with older versions of 15OpenSSL. 16 17The same signature parameters can be set using EVP_PKEY_CTX_set_params() as can 18be set via EVP_MAC_CTX_set_params() for the underlying EVP_MAC. See 19L<EVP_MAC-HMAC(7)>, L<EVP_MAC-Siphash(7)>, L<EVP_MAC-Poly1305(7)> and 20L<EVP_MAC-CMAC(7)> for details. 21 22 See L<EVP_PKEY-HMAC(7)>, L<EVP_PKEY-Siphash(7)>, L<EVP_PKEY-Poly1305(7)> or 23 L<EVP_PKEY-CMAC(7)> for details about parameters that are supported during the 24 creation of an EVP_PKEY. 25 26=head1 SEE ALSO 27 28L<EVP_MAC_init(3)>, 29L<EVP_DigestSignInit(3)>, 30L<EVP_PKEY-HMAC(7)>, 31L<EVP_PKEY-Siphash(7)>, 32L<EVP_PKEY-Poly1305(7)>, 33L<EVP_PKEY-CMAC(7)>, 34L<EVP_MAC-HMAC(7)>, 35L<EVP_MAC-Siphash(7)>, 36L<EVP_MAC-Poly1305(7)>, 37L<EVP_MAC-CMAC(7)>, 38L<provider-signature(7)>, 39 40=head1 COPYRIGHT 41 42Copyright 2020 The OpenSSL Project Authors. All Rights Reserved. 43 44Licensed under the Apache License 2.0 (the "License"). You may not use 45this file except in compliance with the License. You can obtain a copy 46in the file LICENSE in the source distribution or at 47L<https://www.openssl.org/source/license.html>. 48 49=cut 50
