Source for gnu.javax.net.ssl.provider.SSLv3HMacSHAImpl

   1: /* SSLv3HMacSHA.java --
   2:    Copyright (C) 2006  Free Software Foundation, Inc.
   3: 
   4: This file is a part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2 of the License, or (at
   9: your option) any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; if not, write to the Free Software
  18: Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
  19: USA
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.javax.net.ssl.provider;
  40: 
  41: import java.security.InvalidAlgorithmParameterException;
  42: import java.security.InvalidKeyException;
  43: import java.security.Key;
  44: import java.security.spec.AlgorithmParameterSpec;
  45: import java.util.Collections;
  46: import java.util.Map;
  47: 
  48: import javax.crypto.MacSpi;
  49: import javax.crypto.SecretKey;
  50: 
  51: /**
  52:  * @author csm
  53:  */
  54: public class SSLv3HMacSHAImpl extends MacSpi
  55: {
  56:   private final SSLHMac adaptee;
  57: 
  58:   public SSLv3HMacSHAImpl()
  59:   {
  60:     adaptee = new SSLHMac("SHA-160");
  61:   }
  62: 
  63:   /* (non-Javadoc)
  64:    * @see javax.crypto.MacSpi#engineDoFinal()
  65:    */
  66:   @Override protected byte[] engineDoFinal()
  67:   {
  68:     return adaptee.digest();
  69:   }
  70: 
  71:   /* (non-Javadoc)
  72:    * @see javax.crypto.MacSpi#engineGetMacLength()
  73:    */
  74:   @Override protected int engineGetMacLength()
  75:   {
  76:     return adaptee.macSize();
  77:   }
  78: 
  79:   /* (non-Javadoc)
  80:    * @see javax.crypto.MacSpi#engineInit(java.security.Key, java.security.spec.AlgorithmParameterSpec)
  81:    */
  82:   @Override protected void engineInit(Key key, AlgorithmParameterSpec params)
  83:       throws InvalidAlgorithmParameterException, InvalidKeyException
  84:   {
  85:     if (!(key instanceof SecretKey)
  86:         || !key.getAlgorithm().equalsIgnoreCase("SSLv3HMac-SHA"))
  87:       throw new InvalidKeyException("expecting secret key with algorithm \"SSLv3HMac-SHA\"");
  88:     Map<String,byte[]> attr =
  89:       Collections.singletonMap(SSLHMac.MAC_KEY_MATERIAL, key.getEncoded());
  90:     adaptee.init(attr);
  91:   }
  92: 
  93:   /* (non-Javadoc)
  94:    * @see javax.crypto.MacSpi#engineReset()
  95:    */
  96:   @Override protected void engineReset()
  97:   {
  98:     adaptee.reset();
  99:   }
 100: 
 101:   /* (non-Javadoc)
 102:    * @see javax.crypto.MacSpi#engineUpdate(byte)
 103:    */
 104:   @Override protected void engineUpdate(byte input)
 105:   {
 106:     adaptee.update(input);
 107:   }
 108: 
 109:   /* (non-Javadoc)
 110:    * @see javax.crypto.MacSpi#engineUpdate(byte[], int, int)
 111:    */
 112:   @Override protected void engineUpdate(byte[] input, int offset, int length)
 113:   {
 114:     adaptee.update(input, offset, length);
 115:   }
 116: }