libjava/gnu/java/security/provider/RSAKeyFactory.java

   1 /* RSAKeyFactory.java -- RSA key factory.
   2    Copyright (C) 2004  Free Software Foundation, Inc.
   3
   4 This file is 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, or (at your option)
   9 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; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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.java.security.provider;
  40
  41 import java.security.InvalidKeyException;
  42 import java.security.Key;
  43 import java.security.KeyFactorySpi;
  44 import java.security.PrivateKey;
  45 import java.security.PublicKey;
  46
  47 import java.security.interfaces.RSAPrivateCrtKey;
  48 import java.security.interfaces.RSAPrivateKey;
  49 import java.security.interfaces.RSAPublicKey;
  50
  51 import java.security.spec.InvalidKeySpecException;
  52 import java.security.spec.KeySpec;
  53 import java.security.spec.PKCS8EncodedKeySpec;
  54 import java.security.spec.RSAPrivateCrtKeySpec;
  55 import java.security.spec.RSAPrivateKeySpec;
  56 import java.security.spec.RSAPublicKeySpec;
  57 import java.security.spec.X509EncodedKeySpec;
  58
  59 public class RSAKeyFactory extends KeyFactorySpi
  60 {
  61
  62   // Default constructor.
  63   // -------------------------------------------------------------------------
  64
  65   // Instance methods.
  66   // -------------------------------------------------------------------------
  67
  68   protected PrivateKey engineGeneratePrivate(KeySpec spec)
  69     throws InvalidKeySpecException
  70   {
  71     if (spec instanceof RSAPrivateCrtKeySpec)
  72       {
  73         return new GnuRSAPrivateKey((RSAPrivateCrtKeySpec) spec);
  74       }
  75     if (spec instanceof RSAPrivateKeySpec)
  76       {
  77         return new GnuRSAPrivateKey(new RSAPrivateCrtKeySpec(
  78           ((RSAPrivateKeySpec) spec).getModulus(), null,
  79           ((RSAPrivateKeySpec) spec).getPrivateExponent(), null,
  80           null, null, null, null));
  81       }
  82     if (spec instanceof PKCS8EncodedKeySpec)
  83       {
  84         EncodedKeyFactory ekf = new EncodedKeyFactory();
  85         PrivateKey pk = ekf.engineGeneratePrivate(spec);
  86         if (pk instanceof RSAPrivateKey)
  87           return pk;
  88       }
  89     throw new InvalidKeySpecException();
  90   }
  91
  92   protected PublicKey engineGeneratePublic(KeySpec spec)
  93     throws InvalidKeySpecException
  94   {
  95     if (spec instanceof RSAPublicKeySpec)
  96       {
  97         return new GnuRSAPublicKey((RSAPublicKeySpec) spec);
  98       }
  99     if (spec instanceof X509EncodedKeySpec)
 100       {
 101         EncodedKeyFactory ekf = new EncodedKeyFactory();
 102         PublicKey pk = ekf.engineGeneratePublic(spec);
 103         if (pk instanceof RSAPublicKey)
 104           return pk;
 105       }
 106     throw new InvalidKeySpecException();
 107   }
 108
 109   protected KeySpec engineGetKeySpec(Key key, Class keySpec)
 110     throws InvalidKeySpecException
 111   {
 112     if (keySpec.isAssignableFrom(RSAPrivateCrtKeySpec.class)
 113         && (key instanceof RSAPrivateCrtKey))
 114       {
 115         return new RSAPrivateCrtKeySpec(
 116           ((RSAPrivateCrtKey) key).getModulus(),
 117           ((RSAPrivateCrtKey) key).getPublicExponent(),
 118           ((RSAPrivateCrtKey) key).getPrivateExponent(),
 119           ((RSAPrivateCrtKey) key).getPrimeP(),
 120           ((RSAPrivateCrtKey) key).getPrimeQ(),
 121           ((RSAPrivateCrtKey) key).getPrimeExponentP(),
 122           ((RSAPrivateCrtKey) key).getPrimeExponentQ(),
 123           ((RSAPrivateCrtKey) key).getCrtCoefficient());
 124       }
 125     if (keySpec.isAssignableFrom(RSAPrivateKeySpec.class)
 126         && (key instanceof RSAPrivateKey))
 127       {
 128         return new RSAPrivateKeySpec(
 129           ((RSAPrivateCrtKey) key).getModulus(),
 130           ((RSAPrivateCrtKey) key).getPrivateExponent());
 131       }
 132     if (keySpec.isAssignableFrom(RSAPublicKeySpec.class)
 133         && (key instanceof RSAPublicKey))
 134       {
 135         return new RSAPublicKeySpec(
 136           ((RSAPrivateCrtKey) key).getModulus(),
 137           ((RSAPrivateCrtKey) key).getPublicExponent());
 138       }
 139     if (keySpec.isAssignableFrom(PKCS8EncodedKeySpec.class)
 140         && key.getFormat().equalsIgnoreCase("PKCS#8"))
 141       {
 142         return new PKCS8EncodedKeySpec(key.getEncoded());
 143       }
 144     if (keySpec.isAssignableFrom(X509EncodedKeySpec.class)
 145         && key.getFormat().equalsIgnoreCase("X.509"))
 146       {
 147         return new X509EncodedKeySpec(key.getEncoded());
 148       }
 149     throw new InvalidKeySpecException();
 150   }
 151
 152   protected Key engineTranslateKey(Key key) throws InvalidKeyException
 153   {
 154     if (key instanceof RSAPrivateCrtKey)
 155       {
 156         return new GnuRSAPrivateKey(new RSAPrivateCrtKeySpec(
 157           ((RSAPrivateCrtKey) key).getModulus(),
 158           ((RSAPrivateCrtKey) key).getPublicExponent(),
 159           ((RSAPrivateCrtKey) key).getPrivateExponent(),
 160           ((RSAPrivateCrtKey) key).getPrimeP(),
 161           ((RSAPrivateCrtKey) key).getPrimeQ(),
 162           ((RSAPrivateCrtKey) key).getPrimeExponentP(),
 163           ((RSAPrivateCrtKey) key).getPrimeExponentQ(),
 164           ((RSAPrivateCrtKey) key).getCrtCoefficient()));
 165       }
 166     if (key instanceof RSAPrivateKey)
 167       {
 168         return new GnuRSAPrivateKey(new RSAPrivateCrtKeySpec(
 169           ((RSAPrivateKey) key).getModulus(), null,
 170           ((RSAPrivateKey) key).getPrivateExponent(), null,
 171           null, null, null, null));
 172       }
 173     if (key instanceof RSAPublicKey)
 174       {
 175         return new GnuRSAPublicKey(new RSAPublicKeySpec(
 176           ((RSAPrivateCrtKey) key).getModulus(),
 177           ((RSAPrivateCrtKey) key).getPublicExponent()));
 178       }
 179     throw new InvalidKeyException();
 180   }
 181 }