mirror of git://gcc.gnu.org/git/gcc.git
222 lines
8.2 KiB
Java
222 lines
8.2 KiB
Java
/* DSSKeyFactory.java -- JCE DSA key factory Adapter
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.security.jce.sig;
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import gnu.java.security.Registry;
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import gnu.java.security.key.dss.DSSKeyPairPKCS8Codec;
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import gnu.java.security.key.dss.DSSKeyPairX509Codec;
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import gnu.java.security.key.dss.DSSPrivateKey;
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import gnu.java.security.key.dss.DSSPublicKey;
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import java.math.BigInteger;
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import java.security.InvalidKeyException;
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import java.security.Key;
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import java.security.KeyFactorySpi;
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import java.security.PrivateKey;
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import java.security.PublicKey;
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import java.security.interfaces.DSAPrivateKey;
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import java.security.interfaces.DSAPublicKey;
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import java.security.spec.DSAPrivateKeySpec;
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import java.security.spec.DSAPublicKeySpec;
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import java.security.spec.InvalidKeySpecException;
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import java.security.spec.KeySpec;
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import java.security.spec.PKCS8EncodedKeySpec;
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import java.security.spec.X509EncodedKeySpec;
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/**
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* DSA key factory.
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*
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* @author Casey Marshall (rsdio@metastatic.org)
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*/
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public class DSSKeyFactory
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extends KeyFactorySpi
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{
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// implicit 0-arguments constructor
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protected PublicKey engineGeneratePublic(KeySpec keySpec)
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throws InvalidKeySpecException
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{
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if (keySpec instanceof DSAPublicKeySpec)
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{
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DSAPublicKeySpec spec = (DSAPublicKeySpec) keySpec;
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BigInteger p = spec.getP();
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BigInteger q = spec.getQ();
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BigInteger g = spec.getG();
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BigInteger y = spec.getY();
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return new DSSPublicKey(Registry.X509_ENCODING_ID, p, q, g, y);
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}
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if (keySpec instanceof X509EncodedKeySpec)
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{
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X509EncodedKeySpec spec = (X509EncodedKeySpec) keySpec;
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byte[] encoded = spec.getEncoded();
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PublicKey result;
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try
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{
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result = new DSSKeyPairX509Codec().decodePublicKey(encoded);
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return result;
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}
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catch (RuntimeException x)
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{
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throw new InvalidKeySpecException(x.getMessage(), x);
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}
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}
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throw new InvalidKeySpecException("Unsupported (public) key specification");
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}
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protected PrivateKey engineGeneratePrivate(KeySpec keySpec)
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throws InvalidKeySpecException
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{
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if (keySpec instanceof DSAPrivateKeySpec)
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{
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DSAPrivateKeySpec spec = (DSAPrivateKeySpec) keySpec;
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BigInteger p = spec.getP();
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BigInteger q = spec.getQ();
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BigInteger g = spec.getG();
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BigInteger x = spec.getX();
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return new DSSPrivateKey(Registry.PKCS8_ENCODING_ID, p, q, g, x);
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}
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if (keySpec instanceof PKCS8EncodedKeySpec)
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{
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PKCS8EncodedKeySpec spec = (PKCS8EncodedKeySpec) keySpec;
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byte[] encoded = spec.getEncoded();
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PrivateKey result;
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try
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{
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result = new DSSKeyPairPKCS8Codec().decodePrivateKey(encoded);
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return result;
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}
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catch (RuntimeException x)
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{
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throw new InvalidKeySpecException(x.getMessage(), x);
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}
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}
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throw new InvalidKeySpecException("Unsupported (private) key specification");
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}
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protected KeySpec engineGetKeySpec(Key key, Class keySpec)
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throws InvalidKeySpecException
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{
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if (key instanceof DSAPublicKey)
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{
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if (keySpec.isAssignableFrom(DSAPublicKeySpec.class))
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{
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DSAPublicKey dsaKey = (DSAPublicKey) key;
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BigInteger p = dsaKey.getParams().getP();
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BigInteger q = dsaKey.getParams().getQ();
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BigInteger g = dsaKey.getParams().getG();
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BigInteger y = dsaKey.getY();
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return new DSAPublicKeySpec(y, p, q, g);
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}
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if (keySpec.isAssignableFrom(X509EncodedKeySpec.class))
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{
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if (key instanceof DSSPublicKey)
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{
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DSSPublicKey dssKey = (DSSPublicKey) key;
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byte[] encoded = dssKey.getEncoded(Registry.X509_ENCODING_ID);
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return new X509EncodedKeySpec(encoded);
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}
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if (Registry.X509_ENCODING_SORT_NAME.equalsIgnoreCase(key.getFormat()))
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{
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byte[] encoded = key.getEncoded();
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return new X509EncodedKeySpec(encoded);
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}
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throw new InvalidKeySpecException(
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"Wrong key type or unsupported (public) key specification");
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}
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throw new InvalidKeySpecException("Unsupported (public) key specification");
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}
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if (key instanceof DSAPrivateKey)
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{
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if (keySpec.isAssignableFrom(DSAPrivateKeySpec.class))
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{
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DSAPrivateKey dsaKey = (DSAPrivateKey) key;
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BigInteger p = dsaKey.getParams().getP();
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BigInteger q = dsaKey.getParams().getQ();
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BigInteger g = dsaKey.getParams().getG();
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BigInteger x = dsaKey.getX();
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return new DSAPrivateKeySpec(x, p, q, g);
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}
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if (keySpec.isAssignableFrom(PKCS8EncodedKeySpec.class))
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{
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if (key instanceof DSSPrivateKey)
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{
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DSSPrivateKey dssKey = (DSSPrivateKey) key;
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byte[] encoded = dssKey.getEncoded(Registry.PKCS8_ENCODING_ID);
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return new PKCS8EncodedKeySpec(encoded);
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}
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if (Registry.PKCS8_ENCODING_SHORT_NAME.equalsIgnoreCase(key.getFormat()))
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{
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byte[] encoded = key.getEncoded();
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return new PKCS8EncodedKeySpec(encoded);
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}
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throw new InvalidKeySpecException(
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"Wrong key type or unsupported (private) key specification");
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}
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throw new InvalidKeySpecException("Unsupported (private) key specification");
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}
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throw new InvalidKeySpecException("Wrong key type or unsupported key specification");
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}
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protected Key engineTranslateKey(Key key) throws InvalidKeyException
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{
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if ((key instanceof DSSPublicKey) || (key instanceof DSSPrivateKey))
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return key;
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if (key instanceof DSAPublicKey)
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{
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DSAPublicKey dsaKey = (DSAPublicKey) key;
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BigInteger p = dsaKey.getParams().getP();
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BigInteger q = dsaKey.getParams().getQ();
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BigInteger g = dsaKey.getParams().getG();
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BigInteger y = dsaKey.getY();
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return new DSSPublicKey(Registry.X509_ENCODING_ID, p, q, g, y);
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}
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if (key instanceof DSAPrivateKey)
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{
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DSAPrivateKey dsaKey = (DSAPrivateKey) key;
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BigInteger p = dsaKey.getParams().getP();
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BigInteger q = dsaKey.getParams().getQ();
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BigInteger g = dsaKey.getParams().getG();
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BigInteger x = dsaKey.getX();
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return new DSSPrivateKey(Registry.PKCS8_ENCODING_ID, p, q, g, x);
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}
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throw new InvalidKeyException("Wrong key type");
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}
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}
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