109 lines
4.1 KiB
HTML
109 lines
4.1 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_KDF-PBKDF1</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="#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>
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<li><a href="#NOTES">NOTES</a></li>
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<li><a href="#CONFORMING-TO">CONFORMING TO</a></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_KDF-PBKDF1 - The PBKDF1 EVP_KDF implementation</p>
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<h1 id="DESCRIPTION">DESCRIPTION</h1>
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<p>Support for computing the <b>PBKDF1</b> password-based KDF through the <b>EVP_KDF</b> API.</p>
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<p>The EVP_KDF-PBKDF1 algorithm implements the PBKDF1 password-based key derivation function, as described in RFC 8018; it derives a key from a password using a salt and iteration count.</p>
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<h2 id="Identity">Identity</h2>
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<p>"PBKDF1" is the name for this implementation; it can be used with the EVP_KDF_fetch() function.</p>
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<h2 id="Supported-parameters">Supported parameters</h2>
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<p>The supported parameters are:</p>
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<dl>
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<dt id="pass-OSSL_KDF_PARAM_PASSWORD-octet-string">"pass" (<b>OSSL_KDF_PARAM_PASSWORD</b>) <octet string></dt>
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<dd>
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</dd>
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<dt id="salt-OSSL_KDF_PARAM_SALT-octet-string">"salt" (<b>OSSL_KDF_PARAM_SALT</b>) <octet string></dt>
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<dd>
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</dd>
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<dt id="iter-OSSL_KDF_PARAM_ITER-unsigned-integer">"iter" (<b>OSSL_KDF_PARAM_ITER</b>) <unsigned integer></dt>
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<dd>
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<p>This parameter has a default value of 0 and should be set.</p>
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</dd>
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<dt id="properties-OSSL_KDF_PARAM_PROPERTIES-UTF8-string">"properties" (<b>OSSL_KDF_PARAM_PROPERTIES</b>) <UTF8 string></dt>
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<dd>
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</dd>
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<dt id="digest-OSSL_KDF_PARAM_DIGEST-UTF8-string">"digest" (<b>OSSL_KDF_PARAM_DIGEST</b>) <UTF8 string></dt>
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<dd>
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<p>These parameters work as described in <a href="../man3/EVP_KDF.html">"PARAMETERS" in EVP_KDF(3)</a>.</p>
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</dd>
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</dl>
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<h1 id="NOTES">NOTES</h1>
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<p>A typical application of this algorithm is to derive keying material for an encryption algorithm from a password in the "pass", a salt in "salt", and an iteration count.</p>
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<p>Increasing the "iter" parameter slows down the algorithm which makes it harder for an attacker to perform a brute force attack using a large number of candidate passwords.</p>
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<p>No assumption is made regarding the given password; it is simply treated as a byte sequence.</p>
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<p>The legacy provider needs to be available in order to access this algorithm.</p>
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<h1 id="CONFORMING-TO">CONFORMING TO</h1>
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<p>RFC 8018</p>
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<h1 id="SEE-ALSO">SEE ALSO</h1>
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<p><a href="../man3/EVP_KDF.html">EVP_KDF(3)</a>, <a href="../man3/EVP_KDF_CTX_new.html">EVP_KDF_CTX_new(3)</a>, <a href="../man3/EVP_KDF_CTX_free.html">EVP_KDF_CTX_free(3)</a>, <a href="../man3/EVP_KDF_CTX_set_params.html">EVP_KDF_CTX_set_params(3)</a>, <a href="../man3/EVP_KDF_derive.html">EVP_KDF_derive(3)</a>, <a href="../man3/EVP_KDF.html">"PARAMETERS" in EVP_KDF(3)</a>, <a href="../man7/OSSL_PROVIDER-legacy.html">OSSL_PROVIDER-legacy(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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<h1 id="COPYRIGHT">COPYRIGHT</h1>
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<p>Copyright 2021 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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