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<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>EVP_KEYEXCH-X25519</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body style="background-color: white"> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a> <ul> <li><a href="#Key-exchange-parameters">Key exchange parameters</a></li> </ul> </li> <li><a href="#EXAMPLES">EXAMPLES</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>EVP_KEYEXCH-X25519, EVP_KEYEXCH-X448 - X25519 and X448 Key Exchange algorithm support</p> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>Key exchange support for the <b>X25519</b> and <b>X448</b> key types.</p> <h2 id="Key-exchange-parameters">Key exchange parameters</h2> <dl> <dt id="pad-OSSL_EXCHANGE_PARAM_PAD-unsigned-integer">"pad" (<b>OSSL_EXCHANGE_PARAM_PAD</b>) <unsigned integer></dt> <dd> <p>See <a href="../man7/provider-keyexch.html">"Common Key Exchange parameters" in provider-keyexch(7)</a>.</p> </dd> </dl> <h1 id="EXAMPLES">EXAMPLES</h1> <p>Keys for the host and peer can be generated as shown in <a href="../man7/EVP_PKEY-X25519.html">"Examples" in EVP_PKEY-X25519(7)</a>.</p> <p>The code to generate a shared secret is identical to <a href="../man7/EVP_KEYEXCH-DH.html">"Examples" in EVP_KEYEXCH-DH(7)</a>.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man7/EVP_PKEY-FFC.html">EVP_PKEY-FFC(7)</a>, <a href="../man7/EVP_PKEY-DH.html">EVP_PKEY-DH(7)</a> <a href="../man3/EVP_PKEY.html">EVP_PKEY(3)</a>, <a href="../man7/provider-keyexch.html">provider-keyexch(7)</a>, <a href="../man7/provider-keymgmt.html">provider-keymgmt(7)</a>, <a href="../man7/OSSL_PROVIDER-default.html">OSSL_PROVIDER-default(7)</a>, <a href="../man7/OSSL_PROVIDER-FIPS.html">OSSL_PROVIDER-FIPS(7)</a>,</p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.</p> <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> </body> </html>