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<div class="subTitle">com.trilead.ssh2.crypto.cipher</div>
<h2 title="Class AES" class="title">Class AES</h2>
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<li>java.lang.Object</li>
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<pre>public class <span class="strong">AES</span>
extends java.lang.Object
implements <a href="../../../../../com/trilead/ssh2/crypto/cipher/BlockCipher.html" title="interface in com.trilead.ssh2.crypto.cipher">BlockCipher</a></pre>
<div class="block">An implementation of the AES (Rijndael), from FIPS-197.
<p>
For further details see: <a
href="http://csrc.nist.gov/encryption/aes/">http://csrc.nist.gov/encryption/aes/
</a>.
This implementation is based on optimizations from Dr. Brian Gladman's paper
and C code at <a
href="http://fp.gladman.plus.com/cryptography_technology/rijndael/">http://fp.gladman.plus.com/cryptography_technology/rijndael/
</a>
There are three levels of tradeoff of speed vs memory Because java has no
preprocessor, they are written as three separate classes from which to choose
The fastest uses 8Kbytes of static tables to precompute round calculations, 4
256 word tables for encryption and 4 for decryption.
The middle performance version uses only one 256 word table for each, for a
total of 2Kbytes, adding 12 rotate operations per round to compute the values
contained in the other tables from the contents of the first
The slowest version uses no static tables at all and computes the values in
each round
<p>
This file contains the fast version with 8Kbytes of static tables for round
precomputation</div>
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<td class="colOne"><code><strong><a href="../../../../../com/trilead/ssh2/crypto/cipher/AES.html#AES()">AES</a></strong>()</code>
<div class="block">default constructor - 128 bit block size.</div>
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<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/trilead/ssh2/crypto/cipher/AES.html#getAlgorithmName()">getAlgorithmName</a></strong>()</code> </td>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/trilead/ssh2/crypto/cipher/AES.html#getBlockSize()">getBlockSize</a></strong>()</code> </td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/trilead/ssh2/crypto/cipher/AES.html#init(boolean,%20byte[])">init</a></strong>(boolean forEncryption,
byte[] key)</code>
<div class="block">initialise an AES cipher.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/trilead/ssh2/crypto/cipher/AES.html#processBlock(byte[],%20int,%20byte[],%20int)">processBlock</a></strong>(byte[] in,
int inOff,
byte[] out,
int outOff)</code> </td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/trilead/ssh2/crypto/cipher/AES.html#reset()">reset</a></strong>()</code> </td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/trilead/ssh2/crypto/cipher/AES.html#transformBlock(byte[],%20int,%20byte[],%20int)">transformBlock</a></strong>(byte[] src,
int srcoff,
byte[] dst,
int dstoff)</code> </td>
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<pre>public AES()</pre>
<div class="block">default constructor - 128 bit block size.</div>
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<pre>public final void init(boolean forEncryption,
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<div class="block">initialise an AES cipher.</div>
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<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../com/trilead/ssh2/crypto/cipher/BlockCipher.html#init(boolean,%20byte[])">init</a></code> in interface <code><a href="../../../../../com/trilead/ssh2/crypto/cipher/BlockCipher.html" title="interface in com.trilead.ssh2.crypto.cipher">BlockCipher</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>forEncryption</code> - whether or not we are for encryption.</dd><dd><code>key</code> - the key required to set up the cipher.</dd>
<dt><span class="strong">Throws:</span></dt>
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<dd><code><a href="../../../../../com/trilead/ssh2/crypto/cipher/BlockCipher.html#transformBlock(byte[],%20int,%20byte[],%20int)">transformBlock</a></code> in interface <code><a href="../../../../../com/trilead/ssh2/crypto/cipher/BlockCipher.html" title="interface in com.trilead.ssh2.crypto.cipher">BlockCipher</a></code></dd>
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