diff options
Diffstat (limited to 'libjava/classpath/gnu/javax/crypto/jce/sig/DHKeyFactory.java')
-rw-r--r-- | libjava/classpath/gnu/javax/crypto/jce/sig/DHKeyFactory.java | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/crypto/jce/sig/DHKeyFactory.java b/libjava/classpath/gnu/javax/crypto/jce/sig/DHKeyFactory.java new file mode 100644 index 00000000000..701191adc34 --- /dev/null +++ b/libjava/classpath/gnu/javax/crypto/jce/sig/DHKeyFactory.java @@ -0,0 +1,232 @@ +/* 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"); + } +} |