| /* DHKeyFactory.java -- DH key-factory JCE Adapter |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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 Classpath 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 GNU Classpath; 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 |
| combination. |
| |
| As a special exception, the copyright holders of this library give 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 license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.javax.crypto.jce.sig; |
| |
| import gnu.java.security.Registry; |
| import gnu.javax.crypto.key.dh.DHKeyPairPKCS8Codec; |
| import gnu.javax.crypto.key.dh.DHKeyPairX509Codec; |
| import gnu.javax.crypto.key.dh.GnuDHPrivateKey; |
| import gnu.javax.crypto.key.dh.GnuDHPublicKey; |
| |
| import java.math.BigInteger; |
| import java.security.InvalidKeyException; |
| import java.security.Key; |
| import java.security.KeyFactorySpi; |
| import java.security.PrivateKey; |
| import java.security.PublicKey; |
| import java.security.spec.InvalidKeySpecException; |
| import java.security.spec.KeySpec; |
| import java.security.spec.PKCS8EncodedKeySpec; |
| import java.security.spec.X509EncodedKeySpec; |
| |
| import javax.crypto.interfaces.DHPrivateKey; |
| import javax.crypto.interfaces.DHPublicKey; |
| import javax.crypto.spec.DHPrivateKeySpec; |
| import javax.crypto.spec.DHPublicKeySpec; |
| |
| /** |
| * Implementation of a JCE Adapter for DH a key-factory. |
| */ |
| public class DHKeyFactory |
| extends KeyFactorySpi |
| { |
| // implicit 0-arguments constructor |
| |
| protected PublicKey engineGeneratePublic(KeySpec keySpec) |
| throws InvalidKeySpecException |
| { |
| if (keySpec instanceof DHPublicKeySpec) |
| { |
| DHPublicKeySpec spec = (DHPublicKeySpec) keySpec; |
| BigInteger p = spec.getP(); |
| BigInteger g = spec.getG(); |
| BigInteger y = spec.getY(); |
| return new GnuDHPublicKey(Registry.X509_ENCODING_ID, null, p, g, y); |
| } |
| if (keySpec instanceof X509EncodedKeySpec) |
| { |
| X509EncodedKeySpec spec = (X509EncodedKeySpec) keySpec; |
| byte[] encoded = spec.getEncoded(); |
| PublicKey result; |
| try |
| { |
| result = new DHKeyPairX509Codec().decodePublicKey(encoded); |
| return result; |
| } |
| catch (RuntimeException x) |
| { |
| InvalidKeySpecException y = new InvalidKeySpecException(); |
| y.initCause(x); |
| throw y; |
| } |
| } |
| throw new InvalidKeySpecException("Unsupported (public) key specification"); |
| } |
| |
| protected PrivateKey engineGeneratePrivate(KeySpec keySpec) |
| throws InvalidKeySpecException |
| { |
| if (keySpec instanceof DHPrivateKeySpec) |
| { |
| DHPrivateKeySpec spec = (DHPrivateKeySpec) keySpec; |
| BigInteger p = spec.getP(); |
| BigInteger g = spec.getG(); |
| BigInteger x = spec.getX(); |
| return new GnuDHPrivateKey(Registry.PKCS8_ENCODING_ID, null, p, g, x); |
| } |
| if (keySpec instanceof PKCS8EncodedKeySpec) |
| { |
| PKCS8EncodedKeySpec spec = (PKCS8EncodedKeySpec) keySpec; |
| byte[] encoded = spec.getEncoded(); |
| PrivateKey result; |
| try |
| { |
| result = new DHKeyPairPKCS8Codec().decodePrivateKey(encoded); |
| return result; |
| } |
| catch (RuntimeException x) |
| { |
| InvalidKeySpecException y = new InvalidKeySpecException(); |
| y.initCause(x); |
| throw y; |
| } |
| } |
| throw new InvalidKeySpecException("Unsupported (private) key specification"); |
| } |
| |
| protected KeySpec engineGetKeySpec(Key key, Class keySpec) |
| throws InvalidKeySpecException |
| { |
| if (key instanceof DHPublicKey) |
| { |
| if (keySpec.isAssignableFrom(DHPublicKeySpec.class)) |
| { |
| DHPublicKey dssKey = (DHPublicKey) key; |
| BigInteger p = dssKey.getParams().getP(); |
| BigInteger g = dssKey.getParams().getG(); |
| BigInteger y = dssKey.getY(); |
| return new DHPublicKeySpec(y, p, g); |
| } |
| if (keySpec.isAssignableFrom(X509EncodedKeySpec.class)) |
| { |
| if (key instanceof GnuDHPublicKey) |
| { |
| GnuDHPublicKey dhKey = (GnuDHPublicKey) key; |
| byte[] encoded = dhKey.getEncoded(Registry.X509_ENCODING_ID); |
| return new X509EncodedKeySpec(encoded); |
| } |
| if (Registry.X509_ENCODING_SORT_NAME.equalsIgnoreCase(key.getFormat())) |
| { |
| byte[] encoded = key.getEncoded(); |
| return new X509EncodedKeySpec(encoded); |
| } |
| throw new InvalidKeySpecException( |
| "Wrong key type or unsupported (public) key specification"); |
| } |
| throw new InvalidKeySpecException("Unsupported (public) key specification"); |
| } |
| if (key instanceof DHPrivateKey) |
| { |
| if (keySpec.isAssignableFrom(DHPrivateKeySpec.class)) |
| { |
| DHPrivateKey dhKey = (DHPrivateKey) key; |
| BigInteger p = dhKey.getParams().getP(); |
| BigInteger g = dhKey.getParams().getG(); |
| BigInteger x = dhKey.getX(); |
| return new DHPrivateKeySpec(x, p, g); |
| } |
| if (keySpec.isAssignableFrom(PKCS8EncodedKeySpec.class)) |
| { |
| if (key instanceof GnuDHPrivateKey) |
| { |
| GnuDHPrivateKey dhKey = (GnuDHPrivateKey) key; |
| byte[] encoded = dhKey.getEncoded(Registry.PKCS8_ENCODING_ID); |
| return new PKCS8EncodedKeySpec(encoded); |
| } |
| if (Registry.PKCS8_ENCODING_SHORT_NAME.equalsIgnoreCase(key.getFormat())) |
| { |
| byte[] encoded = key.getEncoded(); |
| return new PKCS8EncodedKeySpec(encoded); |
| } |
| throw new InvalidKeySpecException( |
| "Wrong key type or unsupported (private) key specification"); |
| } |
| throw new InvalidKeySpecException( |
| "Unsupported (private) key specification"); |
| } |
| throw new InvalidKeySpecException( |
| "Wrong key type or unsupported key specification"); |
| } |
| |
| protected Key engineTranslateKey(Key key) throws InvalidKeyException |
| { |
| if ((key instanceof GnuDHPublicKey) || (key instanceof GnuDHPrivateKey)) |
| return key; |
| if (key instanceof DHPublicKey) |
| { |
| DHPublicKey dsaKey = (DHPublicKey) key; |
| BigInteger p = dsaKey.getParams().getP(); |
| BigInteger g = dsaKey.getParams().getG(); |
| BigInteger y = dsaKey.getY(); |
| return new GnuDHPublicKey(Registry.X509_ENCODING_ID, null, p, g, y); |
| } |
| if (key instanceof DHPrivateKey) |
| { |
| DHPrivateKey dsaKey = (DHPrivateKey) key; |
| BigInteger p = dsaKey.getParams().getP(); |
| BigInteger g = dsaKey.getParams().getG(); |
| BigInteger x = dsaKey.getX(); |
| return new GnuDHPrivateKey(Registry.PKCS8_ENCODING_ID, null, p, g, x); |
| } |
| throw new InvalidKeyException("Wrong key type"); |
| } |
| } |
