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<title>EVP_KEYEXCH-X25519</title>
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<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>
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<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>
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