112 lines
3.8 KiB
HTML
Executable File
112 lines
3.8 KiB
HTML
Executable File
<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>RC4_set_key</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:root@localhost" />
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</head>
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<body style="background-color: white">
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<!-- INDEX BEGIN -->
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<div name="index">
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<p><a name="__index__"></a></p>
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<ul>
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<li><a href="#name">NAME</a></li>
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<li><a href="#synopsis">SYNOPSIS</a></li>
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<li><a href="#description">DESCRIPTION</a></li>
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<li><a href="#return_values">RETURN VALUES</a></li>
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<li><a href="#note">NOTE</a></li>
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<li><a href="#see_also">SEE ALSO</a></li>
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<li><a href="#history">HISTORY</a></li>
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<li><a href="#copyright">COPYRIGHT</a></li>
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</ul>
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<hr name="index" />
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</div>
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<!-- INDEX END -->
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<p>
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</p>
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<hr />
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<h1><a name="name">NAME</a></h1>
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<p>RC4_set_key, RC4 - RC4 encryption</p>
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<p>
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</p>
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<hr />
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<h1><a name="synopsis">SYNOPSIS</a></h1>
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<pre>
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#include <openssl/rc4.h></pre>
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<p>Deprecated since OpenSSL 3.0, can be hidden entirely by defining
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<strong>OPENSSL_API_COMPAT</strong> with a suitable version value, see
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<em>openssl_user_macros(7)</em>:</p>
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<pre>
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void RC4_set_key(RC4_KEY *key, int len, const unsigned char *data);</pre>
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<pre>
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void RC4(RC4_KEY *key, unsigned long len, const unsigned char *indata,
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unsigned char *outdata);</pre>
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<p>
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</p>
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<hr />
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<h1><a name="description">DESCRIPTION</a></h1>
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<p>All of the functions described on this page are deprecated. Applications should
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instead use <em>EVP_EncryptInit_ex(3)</em>, <em>EVP_EncryptUpdate(3)</em> and
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<em>EVP_EncryptFinal_ex(3)</em> or the equivalently named decrypt functions.</p>
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<p>This library implements the Alleged RC4 cipher, which is described for
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example in <em>Applied Cryptography</em>. It is believed to be compatible
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with RC4[TM], a proprietary cipher of RSA Security Inc.</p>
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<p>RC4 is a stream cipher with variable key length. Typically, 128 bit
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(16 byte) keys are used for strong encryption, but shorter insecure
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key sizes have been widely used due to export restrictions.</p>
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<p>RC4 consists of a key setup phase and the actual encryption or
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decryption phase.</p>
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<p>RC4_set_key() sets up the <strong>RC4_KEY</strong> <strong>key</strong> using the <strong>len</strong> bytes long
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key at <strong>data</strong>.</p>
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<p>RC4() encrypts or decrypts the <strong>len</strong> bytes of data at <strong>indata</strong> using
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<strong>key</strong> and places the result at <strong>outdata</strong>. Repeated RC4() calls with
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the same <strong>key</strong> yield a continuous key stream.</p>
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<p>Since RC4 is a stream cipher (the input is XORed with a pseudo-random
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key stream to produce the output), decryption uses the same function
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calls as encryption.</p>
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<p>
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</p>
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<hr />
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<h1><a name="return_values">RETURN VALUES</a></h1>
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<p>RC4_set_key() and RC4() do not return values.</p>
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<p>
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</p>
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<hr />
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<h1><a name="note">NOTE</a></h1>
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<p>Applications should use the higher level functions
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<em>EVP_EncryptInit(3)</em> etc. instead of calling these
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functions directly.</p>
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<p>It is difficult to securely use stream ciphers. For example, do not perform
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multiple encryptions using the same key stream.</p>
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<p>
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</p>
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<hr />
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<h1><a name="see_also">SEE ALSO</a></h1>
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<p><em>EVP_EncryptInit(3)</em></p>
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<p>
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</p>
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<hr />
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<h1><a name="history">HISTORY</a></h1>
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<p>All of these functions were deprecated in OpenSSL 3.0.</p>
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<p>
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</p>
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<hr />
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<h1><a name="copyright">COPYRIGHT</a></h1>
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<p>Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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<a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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</body>
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</html>
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