101 lines
3.4 KiB
HTML
101 lines
3.4 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>RSA-PSS</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="#signing_and_verification">Signing and Verification</a></li>
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<li><a href="#key_generation">Key Generation</a></li>
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</ul>
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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="#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>RSA-PSS - EVP_PKEY RSA-PSS algorithm support</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>The <strong>RSA-PSS</strong> EVP_PKEY implementation is a restricted version of the RSA
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algorithm which only supports signing, verification and key generation
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using PSS padding modes with optional parameter restrictions.</p>
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<p>It has associated private key and public key formats.</p>
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<p>This algorithm shares several control operations with the <strong>RSA</strong> algorithm
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but with some restrictions described below.</p>
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<p>
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</p>
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<h2><a name="signing_and_verification">Signing and Verification</a></h2>
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<p>Signing and verification is similar to the <strong>RSA</strong> algorithm except the
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padding mode is always PSS. If the key in use has parameter restrictions then
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the corresponding signature parameters are set to the restrictions:
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for example, if the key can only be used with digest SHA256, MGF1 SHA256
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and minimum salt length 32 then the digest, MGF1 digest and salt length
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will be set to SHA256, SHA256 and 32 respectively.</p>
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<p>
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</p>
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<h2><a name="key_generation">Key Generation</a></h2>
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<p>By default no parameter restrictions are placed on the generated key.</p>
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<p>
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</p>
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<hr />
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<h1><a name="notes">NOTES</a></h1>
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<p>The public key format is documented in <a href="http://www.ietf.org/rfc/rfc4055.txt" class="rfc">RFC4055</a>.</p>
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<p>The PKCS#8 private key format used for RSA-PSS keys is similar to the RSA
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format except it uses the <strong>id-RSASSA-PSS</strong> OID and the parameters field, if
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present, restricts the key parameters in the same way as the public key.</p>
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<p>
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</p>
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<hr />
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<h1><a name="conforming_to">CONFORMING TO</a></h1>
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<p>RFC 4055</p>
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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_PKEY_CTX_set_rsa_pss_keygen_md(3)</em>,
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<em>EVP_PKEY_CTX_set_rsa_pss_keygen_mgf1_md(3)</em>,
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<em>EVP_PKEY_CTX_set_rsa_pss_keygen_saltlen(3)</em>,
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<em>EVP_PKEY_CTX_new(3)</em>,
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<em>EVP_PKEY_CTX_ctrl_str(3)</em>,
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<em>EVP_PKEY_derive(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="copyright">COPYRIGHT</a></h1>
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<p>Copyright 2017-2018 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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