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<title>EVP_rc4</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="#COPYRIGHT">COPYRIGHT</a></li>
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<h1 id="NAME">NAME</h1>
<p>EVP_rc4, EVP_rc4_40, EVP_rc4_hmac_md5 - EVP RC4 stream cipher</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<pre><code> #include <openssl/evp.h>
const EVP_CIPHER *EVP_rc4(void)
const EVP_CIPHER *EVP_rc4_40(void)
const EVP_CIPHER *EVP_rc4_hmac_md5(void)</code></pre>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p>The RC4 stream cipher for EVP.</p>
<dl>
<dt id="EVP_rc4">EVP_rc4()</dt>
<dd>
<p>RC4 stream cipher. This is a variable key length cipher with a default key length of 128 bits.</p>
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<dt id="EVP_rc4_40">EVP_rc4_40()</dt>
<dd>
<p>RC4 stream cipher with 40 bit key length.</p>
<p>WARNING: this function is obsolete. Its usage should be replaced with the EVP_rc4() and the EVP_CIPHER_CTX_set_key_length() functions.</p>
</dd>
<dt id="EVP_rc4_hmac_md5">EVP_rc4_hmac_md5()</dt>
<dd>
<p>Authenticated encryption with the RC4 stream cipher with MD5 as HMAC.</p>
<p>WARNING: this is not intended for usage outside of TLS and requires calling of some undocumented ctrl functions. These ciphers do not conform to the EVP AEAD interface.</p>
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<h1 id="RETURN-VALUES">RETURN VALUES</h1>
<p>These functions return an <b>EVP_CIPHER</b> structure that contains the implementation of the symmetric cipher. See <a href="../man3/EVP_CIPHER_meth_new.html">EVP_CIPHER_meth_new(3)</a> for details of the <b>EVP_CIPHER</b> structure.</p>
<h1 id="SEE-ALSO">SEE ALSO</h1>
<p><a href="../man7/evp.html">evp(7)</a>, <a href="../man3/EVP_EncryptInit.html">EVP_EncryptInit(3)</a>, <a href="../man3/EVP_CIPHER_meth_new.html">EVP_CIPHER_meth_new(3)</a></p>
<h1 id="COPYRIGHT">COPYRIGHT</h1>
<p>Copyright 2017 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>
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