120 lines
4.0 KiB
HTML
Executable File
120 lines
4.0 KiB
HTML
Executable File
<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>EVP_MAC-BLAKE2</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:root@localhost" />
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</head>
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<body style="background-color: white">
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<!-- INDEX BEGIN -->
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<div name="index">
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<p><a name="__index__"></a></p>
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<ul>
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<li><a href="#name">NAME</a></li>
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<li><a href="#description">DESCRIPTION</a></li>
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<ul>
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<li><a href="#identity">Identity</a></li>
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<li><a href="#supported_parameters">Supported parameters</a></li>
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</ul>
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<li><a href="#see_also">SEE ALSO</a></li>
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<li><a href="#history">HISTORY</a></li>
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<li><a href="#copyright">COPYRIGHT</a></li>
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</ul>
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<hr name="index" />
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</div>
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<!-- INDEX END -->
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<p>
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</p>
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<hr />
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<h1><a name="name">NAME</a></h1>
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<p>EVP_MAC-BLAKE2, EVP_MAC-BLAKE2BMAC, EVP_MAC-BLAKE2SMAC
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- The BLAKE2 EVP_MAC implementations</p>
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<p>
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</p>
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<hr />
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<h1><a name="description">DESCRIPTION</a></h1>
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<p>Support for computing BLAKE2 MACs through the <strong>EVP_MAC</strong> API.</p>
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<p>
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</p>
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<h2><a name="identity">Identity</a></h2>
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<p>These implementations are identified with one of these names and
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properties, to be used with EVP_MAC_fetch():</p>
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<dl>
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<dt><strong><a name="blake2bmac_provider_default" class="item">"BLAKE2BMAC", "provider=default"</a></strong></dt>
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<dt><strong><a name="blake2smac_provider_default" class="item">"BLAKE2SMAC", "provider=default"</a></strong></dt>
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</dl>
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<p>
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</p>
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<h2><a name="supported_parameters">Supported parameters</a></h2>
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<p>The general description of these parameters can be found in
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<em>EVP_MAC(3)/PARAMETERS</em>.</p>
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<p>All these parameters can be set with <code>EVP_MAC_CTX_set_params()</code>.
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Furthermore, the "size" parameter can be retrieved with
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<code>EVP_MAC_CTX_get_params()</code>, or with <code>EVP_MAC_size()</code>.
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The length of the "size" parameter should not exceed that of a <strong>size_t</strong>.</p>
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<dl>
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<dt><strong><a name="key_ossl_mac_param_key_octet_string" class="item">"key" (<strong>OSSL_MAC_PARAM_KEY</strong>) <octet string></a></strong></dt>
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<dd>
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<p>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.</p>
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</dd>
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<dt><strong><a name="custom_ossl_mac_param_custom_octet_string" class="item">"custom" (<strong>OSSL_MAC_PARAM_CUSTOM</strong>) <octet string></a></strong></dt>
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<dd>
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<p>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.</p>
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</dd>
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<dt><strong><a name="salt_ossl_mac_param_salt_octet_string" class="item">"salt" (<strong>OSSL_MAC_PARAM_SALT</strong>) <octet string></a></strong></dt>
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<dd>
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<p>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.</p>
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</dd>
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<dt><strong><a name="size_ossl_mac_param_size_unsigned_integer" class="item">"size" (<strong>OSSL_MAC_PARAM_SIZE</strong>) <unsigned integer></a></strong></dt>
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<dd>
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<p>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.</p>
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</dd>
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</dl>
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<p>
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</p>
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<hr />
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<h1><a name="see_also">SEE ALSO</a></h1>
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<p><em>EVP_MAC_CTX_get_params(3)</em>, <em>EVP_MAC_CTX_set_params(3)</em>,
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<em>EVP_MAC(3)/PARAMETERS</em>, <em>OSSL_PARAM(3)</em></p>
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<p>
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</p>
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<hr />
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<h1><a name="history">HISTORY</a></h1>
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<p>The macros and functions described here were added to OpenSSL 3.0.</p>
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<p>
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</p>
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<hr />
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<h1><a name="copyright">COPYRIGHT</a></h1>
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<p>Copyright 2018-2019 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>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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<a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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</body>
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</html>
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