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69 lines
1.6 KiB
Plaintext
69 lines
1.6 KiB
Plaintext
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=pod
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=head1 NAME
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EVP_MAC-Siphash - The Siphash EVP_MAC implementation
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=head1 DESCRIPTION
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Support for computing Siphash MACs through the B<EVP_MAC> API.
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=head2 Identity
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This implementation is identified with this name and properties, to be
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used with EVP_MAC_fetch():
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=over 4
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=item "SIPHASH", "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_CTX_set_params().
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Furthermore, the "size" parameter can be retrieved with
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EVP_MAC_CTX_get_params(), or with EVP_MAC_CTX_get_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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Sets the MAC key.
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Setting this parameter is identical to passing a I<key> to L<EVP_MAC_init(3)>.
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=item "size" (B<OSSL_MAC_PARAM_SIZE>) <unsigned integer>
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Sets the MAC size.
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=item "c-rounds" (B<OSSL_MAC_PARAM_C_ROUNDS>) <unsigned integer>
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Specifies the number of rounds per message block. By default this is I<2>.
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=item "d-rounds" (B<OSSL_MAC_PARAM_D_ROUNDS>) <unsigned integer>
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Specifies the number of finalisation rounds. By default this is I<4>.
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=back
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=head1 SEE ALSO
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L<EVP_MAC_CTX_get_params(3)>, L<EVP_MAC_CTX_set_params(3)>,
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L<EVP_MAC(3)/PARAMETERS>, L<OSSL_PARAM(3)>
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=head1 COPYRIGHT
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Copyright 2018-2021 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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