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<a name="Available-ciphers"></a>
<div class="header">
<p>
Next: <a href="Available-cipher-modes.html#Available-cipher-modes" accesskey="n" rel="next">Available cipher modes</a>, Up: <a href="Symmetric-cryptography.html#Symmetric-cryptography" accesskey="u" rel="up">Symmetric cryptography</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Available-ciphers-1"></a>
<h3 class="section">5.1 Available ciphers</h3>

<dl compact="compact">
<dt><code>GCRY_CIPHER_NONE</code></dt>
<dd><p>This is not a real algorithm but used by some functions as error return.
The value always evaluates to false.
</p>
</dd>
<dt><code>GCRY_CIPHER_IDEA</code></dt>
<dd><a name="index-IDEA"></a>
<p>This is the IDEA algorithm.
</p>
</dd>
<dt><code>GCRY_CIPHER_3DES</code></dt>
<dd><a name="index-3DES"></a>
<a name="index-Triple_002dDES"></a>
<a name="index-DES_002dEDE"></a>
<a name="index-Digital-Encryption-Standard"></a>
<p>Triple-DES with 3 Keys as EDE.  The key size of this algorithm is 168 but
you have to pass 192 bits because the most significant bits of each byte
are ignored.
</p>
</dd>
<dt><code>GCRY_CIPHER_CAST5</code></dt>
<dd><a name="index-CAST5"></a>
<p>CAST128-5 block cipher algorithm.  The key size is 128 bits.
</p>
</dd>
<dt><code>GCRY_CIPHER_BLOWFISH</code></dt>
<dd><a name="index-Blowfish"></a>
<p>The blowfish algorithm. The current implementation allows only for a key
size of 128 bits.
</p>
</dd>
<dt><code>GCRY_CIPHER_SAFER_SK128</code></dt>
<dd><p>Reserved and not currently implemented.
</p>
</dd>
<dt><code>GCRY_CIPHER_DES_SK</code></dt>
<dd><p>Reserved and not currently implemented.
</p>
</dd>
<dt><code>GCRY_CIPHER_AES</code></dt>
<dt><code>GCRY_CIPHER_AES128</code></dt>
<dt><code>GCRY_CIPHER_RIJNDAEL</code></dt>
<dt><code>GCRY_CIPHER_RIJNDAEL128</code></dt>
<dd><a name="index-Rijndael"></a>
<a name="index-AES"></a>
<a name="index-Advanced-Encryption-Standard"></a>
<p>AES (Rijndael) with a 128 bit key.
</p>
</dd>
<dt><code>GCRY_CIPHER_AES192</code></dt>
<dt><code>GCRY_CIPHER_RIJNDAEL192</code></dt>
<dd><p>AES (Rijndael) with a 192 bit key.
</p>
</dd>
<dt><code>GCRY_CIPHER_AES256</code></dt>
<dt><code>GCRY_CIPHER_RIJNDAEL256</code></dt>
<dd><p>AES (Rijndael) with a 256 bit key.
</p>
</dd>
<dt><code>GCRY_CIPHER_TWOFISH</code></dt>
<dd><a name="index-Twofish"></a>
<p>The Twofish algorithm with a 256 bit key.
</p>
</dd>
<dt><code>GCRY_CIPHER_TWOFISH128</code></dt>
<dd><p>The Twofish algorithm with a 128 bit key.
</p>
</dd>
<dt><code>GCRY_CIPHER_ARCFOUR</code></dt>
<dd><a name="index-Arcfour"></a>
<a name="index-RC4"></a>
<p>An algorithm which is 100% compatible with RSA Inc.&rsquo;s RC4 algorithm.
Note that this is a stream cipher and must be used very carefully to
avoid a couple of weaknesses.
</p>
</dd>
<dt><code>GCRY_CIPHER_DES</code></dt>
<dd><a name="index-DES"></a>
<p>Standard DES with a 56 bit key. You need to pass 64 bit but the high
bits of each byte are ignored.  Note, that this is a weak algorithm
which can be broken in reasonable time using a brute force approach.
</p>
</dd>
<dt><code>GCRY_CIPHER_SERPENT128</code></dt>
<dt><code>GCRY_CIPHER_SERPENT192</code></dt>
<dt><code>GCRY_CIPHER_SERPENT256</code></dt>
<dd><a name="index-Serpent"></a>
<p>The Serpent cipher from the AES contest.
</p>
</dd>
<dt><code>GCRY_CIPHER_RFC2268_40</code></dt>
<dt><code>GCRY_CIPHER_RFC2268_128</code></dt>
<dd><a name="index-rfc_002d2268"></a>
<a name="index-RC2"></a>
<p>Ron&rsquo;s Cipher 2 in the 40 and 128 bit variants.
</p>
</dd>
<dt><code>GCRY_CIPHER_SEED</code></dt>
<dd><a name="index-Seed-_0028cipher_0029"></a>
<p>A 128 bit cipher as described by RFC4269.
</p>
</dd>
<dt><code>GCRY_CIPHER_CAMELLIA128</code></dt>
<dt><code>GCRY_CIPHER_CAMELLIA192</code></dt>
<dt><code>GCRY_CIPHER_CAMELLIA256</code></dt>
<dd><a name="index-Camellia"></a>
<p>The Camellia cipher by NTT.  See
<a href="http://info.isl.ntt.co.jp/crypt/eng/camellia/specifications.html">http://info.isl.ntt.co.jp/crypt/eng/camellia/specifications.html</a>.
</p>
</dd>
<dt><code>GCRY_CIPHER_SALSA20</code></dt>
<dd><a name="index-Salsa20"></a>
<p>This is the Salsa20 stream cipher.
</p>
</dd>
<dt><code>GCRY_CIPHER_SALSA20R12</code></dt>
<dd><a name="index-Salsa20_002f12"></a>
<p>This is the Salsa20/12 - reduced round version of Salsa20 stream cipher.
</p>
</dd>
<dt><code>GCRY_CIPHER_GOST28147</code></dt>
<dd><a name="index-GOST-28147_002d89"></a>
<p>The GOST 28147-89 cipher, defined in the respective GOST standard.
Translation of this GOST into English is provided in the RFC-5830.
</p>
</dd>
</dl>

<hr>
<div class="header">
<p>
Next: <a href="Available-cipher-modes.html#Available-cipher-modes" accesskey="n" rel="next">Available cipher modes</a>, Up: <a href="Symmetric-cryptography.html#Symmetric-cryptography" accesskey="u" rel="up">Symmetric cryptography</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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