=pod =head1 NAME EVP_MAC-HMAC - The HMAC EVP_MAC implementation =head1 DESCRIPTION Support for computing HMAC MACs through the B API. =head2 Identity This implementation is identified with this name and properties, to be used with EVP_MAC_fetch(): =over 4 =item "HMAC", "default=yes" =back =head2 Supported parameters The general description of these parameters can be found in L. The following parameter can be set with EVP_MAC_CTX_set_params(): =over 4 =item "key" (B) =item "flags" (B) =item "digest" (B) =item "properties" (B) =back The "flags" parameter is passed directly to HMAC_CTX_set_flags(). The following parameter can be retrieved with EVP_MAC_CTX_get_params(): =over 4 =item "size" (B) =back The "size" parameter can also be retrieved with EVP_MAC_size(). The length of the "size" parameter is equal to that of an B. =head1 SEE ALSO L, L, L, L, L =head1 COPYRIGHT Copyright 2018-2019 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. =cut