99 lines
2.9 KiB
HTML
Executable File
99 lines
2.9 KiB
HTML
Executable File
<?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>EVP_chacha20</title>
|
|
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
|
|
<link rev="made" href="mailto:root@localhost" />
|
|
</head>
|
|
|
|
<body style="background-color: white">
|
|
|
|
|
|
<!-- INDEX BEGIN -->
|
|
<div name="index">
|
|
<p><a name="__index__"></a></p>
|
|
|
|
<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="#see_also">SEE ALSO</a></li>
|
|
<li><a href="#copyright">COPYRIGHT</a></li>
|
|
</ul>
|
|
|
|
<hr name="index" />
|
|
</div>
|
|
<!-- INDEX END -->
|
|
|
|
<p>
|
|
</p>
|
|
<hr />
|
|
<h1><a name="name">NAME</a></h1>
|
|
<p>EVP_chacha20,
|
|
EVP_chacha20_poly1305
|
|
- EVP ChaCha20 stream cipher</p>
|
|
<p>
|
|
</p>
|
|
<hr />
|
|
<h1><a name="synopsis">SYNOPSIS</a></h1>
|
|
<pre>
|
|
#include <openssl/evp.h></pre>
|
|
<pre>
|
|
const EVP_CIPHER *EVP_chacha20(void)
|
|
const EVP_CIPHER *EVP_chacha20_poly1305(void)</pre>
|
|
<p>
|
|
</p>
|
|
<hr />
|
|
<h1><a name="description">DESCRIPTION</a></h1>
|
|
<p>The ChaCha20 stream cipher for EVP.</p>
|
|
<dl>
|
|
<dt><strong><a name="evp_chacha20" class="item">EVP_chacha20()</a></strong></dt>
|
|
|
|
<dd>
|
|
<p>The ChaCha20 stream cipher. The key length is 256 bits, the IV is 128 bits long.
|
|
The first 32 bits consists of a counter in little-endian order followed by a 96
|
|
bit nonce. For example a nonce of:</p>
|
|
<p>000000000000000000000002</p>
|
|
<p>With an initial counter of 42 (2a in hex) would be expressed as:</p>
|
|
<p>2a000000000000000000000000000002</p>
|
|
</dd>
|
|
<dt><strong><a name="evp_chacha20_poly1305" class="item">EVP_chacha20_poly1305()</a></strong></dt>
|
|
|
|
<dd>
|
|
<p>Authenticated encryption with ChaCha20-Poly1305. Like EVP_chacha20(), the key
|
|
is 256 bits and the IV is 96 bits. This supports additional authenticated data
|
|
(AAD) and produces a 128-bit authentication tag. See the
|
|
<em>EVP_EncryptInit(3)/AEAD Interface</em> section for more information.</p>
|
|
</dd>
|
|
</dl>
|
|
<p>
|
|
</p>
|
|
<hr />
|
|
<h1><a name="return_values">RETURN VALUES</a></h1>
|
|
<p>These functions return an <strong>EVP_CIPHER</strong> structure that contains the
|
|
implementation of the symmetric cipher. See <em>EVP_CIPHER_meth_new(3)</em> for
|
|
details of the <strong>EVP_CIPHER</strong> structure.</p>
|
|
<p>
|
|
</p>
|
|
<hr />
|
|
<h1><a name="see_also">SEE ALSO</a></h1>
|
|
<p><em>evp(7)</em>,
|
|
<em>EVP_EncryptInit(3)</em>,
|
|
<em>EVP_CIPHER_meth_new(3)</em></p>
|
|
<p>
|
|
</p>
|
|
<hr />
|
|
<h1><a name="copyright">COPYRIGHT</a></h1>
|
|
<p>Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.</p>
|
|
<p>Licensed under the Apache License 2.0 (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>
|