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EVP_SIGNATURE-HMAC(7SSL)                       OpenSSL                      EVP_SIGNATURE-HMAC(7SSL)



NAME
       EVP_SIGNATURE-HMAC, EVP_SIGNATURE-Siphash, EVP_SIGNATURE-Poly1305, EVP_SIGNATURE-CMAC - The
       legacy EVP_PKEY MAC signature implementations

DESCRIPTION
       The algorithms described here have legacy support for creating MACs using
       EVP_DigestSignInit(3) and related functions. This is not the preferred way of creating MACs.
       Instead you should use the newer EVP_MAC_init(3) functions.  This mechanism is provided for
       backwards compatibility with older versions of OpenSSL.

       The same signature parameters can be set using EVP_PKEY_CTX_set_params() as can be set via
       EVP_MAC_CTX_set_params() for the underlying EVP_MAC. See EVP_MAC-HMAC(7), EVP_MAC-Siphash(7),
       EVP_MAC-Poly1305(7) and EVP_MAC-CMAC(7) for details.

        See L<EVP_PKEY-HMAC(7)>, L<EVP_PKEY-Siphash(7)>, L<EVP_PKEY-Poly1305(7)> or
        L<EVP_PKEY-CMAC(7)> for details about parameters that are supported during the
        creation of an EVP_PKEY.

SEE ALSO
       EVP_MAC_init(3), EVP_DigestSignInit(3), EVP_PKEY-HMAC(7), EVP_PKEY-Siphash(7),
       EVP_PKEY-Poly1305(7), EVP_PKEY-CMAC(7), EVP_MAC-HMAC(7), EVP_MAC-Siphash(7),
       EVP_MAC-Poly1305(7), EVP_MAC-CMAC(7), provider-signature(7),

COPYRIGHT
       Copyright 2020 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>.



3.0.2                                        2026-06-02                     EVP_SIGNATURE-HMAC(7SSL)