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<ul>

	<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="#notes">NOTES</a></li>
	<li><a href="#see_also">SEE ALSO</a></li>
	<li><a href="#copyright">COPYRIGHT</a></li>
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<p>
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<h1><a name="name">NAME</a></h1>
<p>RAND_DRBG_set_ex_data,
RAND_DRBG_get_ex_data,
RAND_DRBG_get_ex_new_index
- store and retrieve extra data from the DRBG instance</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
 #include &lt;openssl/rand_drbg.h&gt;</pre>
<pre>
 int RAND_DRBG_set_ex_data(RAND_DRBG *drbg, int idx, void *data);</pre>
<pre>
 void *RAND_DRBG_get_ex_data(const RAND_DRBG *drbg, int idx);</pre>
<pre>
 int RAND_DRBG_get_ex_new_index(long argl, void *argp,
                                CRYPTO_EX_new *new_func,
                                CRYPTO_EX_dup *dup_func,
                                CRYPTO_EX_free *free_func);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p><code>RAND_DRBG_set_ex_data()</code> enables an application to store arbitrary application
specific data <strong>data</strong> in a RAND_DRBG instance <strong>drbg</strong>. The index <strong>idx</strong> should
be a value previously returned from a call to <code>RAND_DRBG_get_ex_new_index()</code>.</p>
<p><code>RAND_DRBG_get_ex_data()</code> retrieves application specific data previously stored
in an RAND_DRBG instance <strong>drbg</strong>. The <strong>idx</strong> value should be the same as that
used when originally storing the data.</p>
<p>For more detailed information see <em>CRYPTO_get_ex_data(3)</em> and
<em>CRYPTO_set_ex_data(3)</em> which implement these functions and
<em>CRYPTO_get_ex_new_index(3)</em> for generating a unique index.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p><code>RAND_DRBG_set_ex_data()</code> returns 1 for success or 0 for failure.</p>
<p><code>RAND_DRBG_get_ex_data()</code> returns the previously stored value or NULL on
failure. NULL may also be a valid value.</p>
<p>
</p>
<hr />
<h1><a name="notes">NOTES</a></h1>
<p>RAND_DRBG_get_ex_new_index(...) is implemented as a macro and equivalent to
CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DRBG,...).</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>CRYPTO_get_ex_data(3)</em>,
<em>CRYPTO_set_ex_data(3)</em>,
<em>CRYPTO_get_ex_new_index(3)</em>,
<em>RAND_DRBG(7)</em></p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (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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