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d9c2fd51e2
functions are now EVP_MAC functions, usually with ctx in their names. Before 3.0 is released, the names are mutable and this prevents more inconsistencies being introduced. There are no functional or code changes. Just the renaming and a little reformatting. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11997)
81 lines
2.0 KiB
Plaintext
81 lines
2.0 KiB
Plaintext
=pod
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=head1 NAME
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EVP_MAC-BLAKE2, EVP_MAC-BLAKE2BMAC, EVP_MAC-BLAKE2SMAC
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- The BLAKE2 EVP_MAC implementations
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=head1 DESCRIPTION
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Support for computing BLAKE2 MACs through the B<EVP_MAC> API.
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=head2 Identity
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These implementations are identified with one of these names and
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properties, to be used with EVP_MAC_fetch():
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=over 4
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=item "BLAKE2BMAC", "provider=default"
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=item "BLAKE2SMAC", "provider=default"
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=back
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=head2 Supported parameters
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The general description of these parameters can be found in
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L<EVP_MAC(3)/PARAMETERS>.
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All these parameters can be set with EVP_MAC_set_ctx_params().
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Furthermore, the "size" parameter can be retrieved with
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EVP_MAC_get_ctx_params(), or with EVP_MAC_size().
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The length of the "size" parameter should not exceed that of a B<size_t>.
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=over 4
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=item "key" (B<OSSL_MAC_PARAM_KEY>) <octet string>
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This may be at most 64 bytes for BLAKE2BMAC or 32 for BLAKE2SMAC and
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at least 1 byte in both cases.
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=item "custom" (B<OSSL_MAC_PARAM_CUSTOM>) <octet string>
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This is an optional value of at most 16 bytes for BLAKE2BMAC or 8 for
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BLAKE2SMAC.
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It is empty by default.
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=item "salt" (B<OSSL_MAC_PARAM_SALT>) <octet string>
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This is an optional value of at most 16 bytes for BLAKE2BMAC or 8 for
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BLAKE2SMAC.
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It is empty by default.
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=item "size" (B<OSSL_MAC_PARAM_SIZE>) <unsigned integer>
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When set, this can be any number between between 1 and 32 for
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EVP_MAC_BLAKE2S or 64 for EVP_MAC_BLAKE2B.
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It is 32 and 64 respectively by default.
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=back
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=head1 SEE ALSO
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L<EVP_MAC_get_ctx_params(3)>, L<EVP_MAC_set_ctx_params(3)>,
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L<EVP_MAC(3)/PARAMETERS>, L<OSSL_PARAM(3)>
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=head1 HISTORY
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The macros and functions described here were added to OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (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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