96 lines
3.5 KiB
HTML
96 lines
3.5 KiB
HTML
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<?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_MD-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:" />
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</head>
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<body>
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<ul id="index">
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<li><a href="#NAME">NAME</a></li>
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<li><a href="#DESCRIPTION">DESCRIPTION</a>
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<ul>
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<li><a href="#Identities">Identities</a></li>
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<li><a href="#Gettable-Parameters">Gettable Parameters</a></li>
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<li><a href="#Settable-Context-Parameters">Settable Context Parameters</a></li>
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</ul>
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</li>
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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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<h1 id="NAME">NAME</h1>
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<p>EVP_MD-BLAKE2 - The BLAKE2 EVP_MD implementation</p>
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<h1 id="DESCRIPTION">DESCRIPTION</h1>
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<p>Support for computing BLAKE2 digests through the <b>EVP_MD</b> API.</p>
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<h2 id="Identities">Identities</h2>
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<p>This implementation is only available with the default provider, and includes the following varieties:</p>
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<dl>
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<dt id="BLAKE2S-256">BLAKE2S-256</dt>
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<dd>
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<p>Known names are "BLAKE2S-256" and "BLAKE2s256".</p>
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</dd>
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<dt id="BLAKE2B-512">BLAKE2B-512</dt>
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<dd>
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<p>Known names are "BLAKE2B-512" and "BLAKE2b512".</p>
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</dd>
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</dl>
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<h2 id="Gettable-Parameters">Gettable Parameters</h2>
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<p>This implementation supports the common gettable parameters described in <a href="../man7/EVP_MD-common.html">EVP_MD-common(7)</a>.</p>
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<h2 id="Settable-Context-Parameters">Settable Context Parameters</h2>
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<p>The BLAKE2B-512 implementation supports the following <a href="../man3/OSSL_PARAM.html">OSSL_PARAM(3)</a> entries which are settable for an <b>EVP_MD_CTX</b> with <a href="../man3/EVP_DigestInit_ex2.html">EVP_DigestInit_ex2(3)</a> or <a href="../man3/EVP_MD_CTX_set_params.html">EVP_MD_CTX_set_params(3)</a>:</p>
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<dl>
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<dt id="size-OSSL_DIGEST_PARAM_SIZE-unsigned-integer">"size" (<b>OSSL_DIGEST_PARAM_SIZE</b>) <unsigned integer></dt>
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<dd>
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<p>Sets a different digest length for the <a href="../man3/EVP_DigestFinal.html">EVP_DigestFinal(3)</a> output. The value of the "size" parameter must not exceed the default digest length (64 for BLAKE2B-512). The parameter must be set with the <a href="../man3/EVP_DigestInit_ex2.html">EVP_DigestInit_ex2(3)</a> call to have an immediate effect. When set with <a href="../man3/EVP_MD_CTX_set_params.html">EVP_MD_CTX_set_params(3)</a> it will have an effect only if the <b>EVP_MD_CTX</b> context is reinitialized.</p>
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</dd>
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</dl>
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<h1 id="SEE-ALSO">SEE ALSO</h1>
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<p><a href="../man7/provider-digest.html">provider-digest(7)</a>, <a href="../man7/OSSL_PROVIDER-default.html">OSSL_PROVIDER-default(7)</a></p>
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<h1 id="HISTORY">HISTORY</h1>
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<p>This functionality was added in OpenSSL 3.0.</p>
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<p>The variable size support was added in OpenSSL 3.2 for BLAKE2B-512.</p>
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<h1 id="COPYRIGHT">COPYRIGHT</h1>
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<p>Copyright 2020-2023 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 this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <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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