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<title>DH_new</title>
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<ul id="index">
<li><a href="#NAME">NAME</a></li>
<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
<li><a href="#SEE-ALSO">SEE ALSO</a></li>
<li><a href="#HISTORY">HISTORY</a></li>
<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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<h1 id="NAME">NAME</h1>
<p>DH_new, DH_free - allocate and free DH objects</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<pre><code> #include &lt;openssl/dh.h&gt;</code></pre>
<p>The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining <b>OPENSSL_API_COMPAT</b> with a suitable version value, see <a href="../man7/openssl_user_macros.html">openssl_user_macros(7)</a>:</p>
<pre><code> DH* DH_new(void);
void DH_free(DH *dh);</code></pre>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p>DH_new() allocates and initializes a <b>DH</b> structure.</p>
<p>DH_free() frees the <b>DH</b> structure and its components. The values are erased before the memory is returned to the system. If <b>dh</b> is NULL nothing is done.</p>
<h1 id="RETURN-VALUES">RETURN VALUES</h1>
<p>If the allocation fails, DH_new() returns <b>NULL</b> and sets an error code that can be obtained by <a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>. Otherwise it returns a pointer to the newly allocated structure.</p>
<p>DH_free() returns no value.</p>
<h1 id="SEE-ALSO">SEE ALSO</h1>
<p><a href="../man3/DH_new.html">DH_new(3)</a>, <a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>, <a href="../man3/DH_generate_parameters.html">DH_generate_parameters(3)</a>, <a href="../man3/DH_generate_key.html">DH_generate_key(3)</a>, <a href="../man7/EVP_PKEY-DH.html">EVP_PKEY-DH(7)</a></p>
<h1 id="HISTORY">HISTORY</h1>
<p>All of these functions were deprecated in OpenSSL 3.0.</p>
<p>For replacement see EVP_PKEY-DH(7).</p>
<h1 id="COPYRIGHT">COPYRIGHT</h1>
<p>Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the Apache License 2.0 (the &quot;License&quot;). 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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