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GNU Crypto(gnu-crypto)
Server: Savannah GNU
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$Savannah GNU\g\gnu-crypto\gnu-crypto\gnu-crypto\source\gnu\crypto\hash\$ ...pto\source\gnu\crypto\hash\
BaseHash.java HashFactory.java Haval.java IMessageDigest.java MD2.java MD4.java MD5.java package.html RipeMD128.java RipeMD160.java Sha160.java Sha256.java Sha384.java Sha512.java Tiger.java Whirlpool.java

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 Copyright (C) 2003, Free Software Foundation, Inc.

 This file is part of GNU Crypto.

 GNU Crypto is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 GNU Crypto is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; see the file COPYING.  If not, write to the

    Free Software Foundation Inc.,
    51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301
    USA

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
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 you permission to link this library with independent modules to
 produce an executable, regardless of the license terms of these
 independent modules, and to copy and distribute the resulting
 executable under terms of your choice, provided that you also meet,
 for each linked independent module, the terms and conditions of the
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Provides a basic API for using message digest algorithms.


<h2>Package overview</h2>

<p>Message digests, or one-way hash functions, generate fixed-sized
signatures from variable-sized texts, in such a way that it is
computationally infeasible to determine the source text from the
signature or to find a different text that hashes to the same
signature.</p>

<p>The following diagram shows the important classes participating in this
package:</p>

<p><img src="{@docRoot}/../diagrams/hash_class_diag.png"
         width=362 height=271 border=0></p>

<p>Here is a simple example of how to use the SHA-1 <i>hash</i>.</p>

<pre>
IMessageDigest md = HashFactory.getInstance("SHA-1");
md.update(input, 0, input.length);
byte[] digest = md.digest();
</pre>
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