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RAND_DRBG_get_ex_data.html
<?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>RAND_DRBG_set_ex_data</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <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="#NOTES">NOTES</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>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> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/rand_drbg.h> int RAND_DRBG_set_ex_data(RAND_DRBG *drbg, int idx, void *data); void *RAND_DRBG_get_ex_data(const RAND_DRBG *drbg, int idx); 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);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>RAND_DRBG_set_ex_data() enables an application to store arbitrary application specific data <b>data</b> in a RAND_DRBG instance <b>drbg</b>. The index <b>idx</b> should be a value previously returned from a call to RAND_DRBG_get_ex_new_index().</p> <p>RAND_DRBG_get_ex_data() retrieves application specific data previously stored in an RAND_DRBG instance <b>drbg</b>. The <b>idx</b> value should be the same as that used when originally storing the data.</p> <p>For more detailed information see <a href="../man3/CRYPTO_get_ex_data.html">CRYPTO_get_ex_data(3)</a> and <a href="../man3/CRYPTO_set_ex_data.html">CRYPTO_set_ex_data(3)</a> which implement these functions and <a href="../man3/CRYPTO_get_ex_new_index.html">CRYPTO_get_ex_new_index(3)</a> for generating a unique index.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>RAND_DRBG_set_ex_data() returns 1 for success or 0 for failure.</p> <p>RAND_DRBG_get_ex_data() returns the previously stored value or NULL on failure. NULL may also be a valid value.</p> <h1 id="NOTES">NOTES</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> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man3/CRYPTO_get_ex_data.html">CRYPTO_get_ex_data(3)</a>, <a href="../man3/CRYPTO_set_ex_data.html">CRYPTO_set_ex_data(3)</a>, <a href="../man3/CRYPTO_get_ex_new_index.html">CRYPTO_get_ex_new_index(3)</a>, <a href="../man7/RAND_DRBG.html">RAND_DRBG(7)</a></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (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>
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