package org.jboss.seam.security.crypto;
/**
* Copied from Matthias Gartner's PKCS#5 implementation - see
* http://rtner.de/software/PBKDF2.html
*
* <p>
* A free Java implementation of Password Based Key Derivation Function 2 as
* defined by RFC 2898. Copyright (c) 2007 Matthias Gärtner
* </p>
* <p>
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
* </p>
* <p>
* This library 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 Lesser General Public License for more
* details.
* </p>
* <p>
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* </p>
* <p>
* For Details, see <a
* href="http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html">http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html</a>.
* </p>
*
* @author Matthias Gärtner
* @version 1.0
*/
public class PBKDF2HexFormatter implements PBKDF2Formatter
{
public boolean fromString(PBKDF2Parameters p, String s)
{
if (p == null || s == null)
{
return true;
}
String[] p123 = s.split(":");
if (p123 == null || p123.length != 3)
{
return true;
}
byte salt[] = BinTools.hex2bin(p123[0]);
int iterationCount = Integer.parseInt(p123[1]);
byte bDK[] = BinTools.hex2bin(p123[2]);
p.setSalt(salt);
p.setIterationCount(iterationCount);
p.setDerivedKey(bDK);
return false;
}
public String toString(PBKDF2Parameters p)
{
String s = BinTools.bin2hex(p.getSalt()) + ":"
+ String.valueOf(p.getIterationCount()) + ":"
+ BinTools.bin2hex(p.getDerivedKey());
return s;
}
}