| /* |
| * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.provider; |
| |
| import java.util.*; |
| import java.lang.*; |
| import java.security.Key; |
| import java.security.PublicKey; |
| import java.security.PrivateKey; |
| import java.security.KeyFactorySpi; |
| import java.security.InvalidKeyException; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.interfaces.DSAParams; |
| import java.security.spec.DSAPublicKeySpec; |
| import java.security.spec.DSAPrivateKeySpec; |
| import java.security.spec.KeySpec; |
| import java.security.spec.InvalidKeySpecException; |
| import java.security.spec.X509EncodedKeySpec; |
| import java.security.spec.PKCS8EncodedKeySpec; |
| |
| import sun.security.action.GetPropertyAction; |
| |
| /** |
| * This class implements the DSA key factory of the Sun provider. |
| * |
| * @author Jan Luehe |
| * |
| * |
| * @since 1.2 |
| */ |
| |
| public class DSAKeyFactory extends KeyFactorySpi { |
| |
| // package private for DSAKeyPairGenerator |
| static final boolean SERIAL_INTEROP; |
| private static final String SERIAL_PROP = "sun.security.key.serial.interop"; |
| |
| static { |
| |
| /** |
| * Check to see if we need to maintain interoperability for serialized |
| * keys between JDK 5.0 -> JDK 1.4. In other words, determine whether |
| * a key object serialized in JDK 5.0 must be deserializable in |
| * JDK 1.4. |
| * |
| * If true, then we generate sun.security.provider.DSAPublicKey. |
| * If false, then we generate sun.security.provider.DSAPublicKeyImpl. |
| * |
| * By default this is false. |
| * This incompatibility was introduced by 4532506. |
| */ |
| String prop = AccessController.doPrivileged |
| (new GetPropertyAction(SERIAL_PROP, null)); |
| SERIAL_INTEROP = "true".equalsIgnoreCase(prop); |
| } |
| |
| /** |
| * Generates a public key object from the provided key specification |
| * (key material). |
| * |
| * @param keySpec the specification (key material) of the public key |
| * |
| * @return the public key |
| * |
| * @exception InvalidKeySpecException if the given key specification |
| * is inappropriate for this key factory to produce a public key. |
| */ |
| protected PublicKey engineGeneratePublic(KeySpec keySpec) |
| throws InvalidKeySpecException { |
| try { |
| if (keySpec instanceof DSAPublicKeySpec) { |
| DSAPublicKeySpec dsaPubKeySpec = (DSAPublicKeySpec)keySpec; |
| if (SERIAL_INTEROP) { |
| return new DSAPublicKey(dsaPubKeySpec.getY(), |
| dsaPubKeySpec.getP(), |
| dsaPubKeySpec.getQ(), |
| dsaPubKeySpec.getG()); |
| } else { |
| return new DSAPublicKeyImpl(dsaPubKeySpec.getY(), |
| dsaPubKeySpec.getP(), |
| dsaPubKeySpec.getQ(), |
| dsaPubKeySpec.getG()); |
| } |
| } else if (keySpec instanceof X509EncodedKeySpec) { |
| if (SERIAL_INTEROP) { |
| return new DSAPublicKey |
| (((X509EncodedKeySpec)keySpec).getEncoded()); |
| } else { |
| return new DSAPublicKeyImpl |
| (((X509EncodedKeySpec)keySpec).getEncoded()); |
| } |
| } else { |
| throw new InvalidKeySpecException |
| ("Inappropriate key specification"); |
| } |
| } catch (InvalidKeyException e) { |
| throw new InvalidKeySpecException |
| ("Inappropriate key specification: " + e.getMessage()); |
| } |
| } |
| |
| /** |
| * Generates a private key object from the provided key specification |
| * (key material). |
| * |
| * @param keySpec the specification (key material) of the private key |
| * |
| * @return the private key |
| * |
| * @exception InvalidKeySpecException if the given key specification |
| * is inappropriate for this key factory to produce a private key. |
| */ |
| protected PrivateKey engineGeneratePrivate(KeySpec keySpec) |
| throws InvalidKeySpecException { |
| try { |
| if (keySpec instanceof DSAPrivateKeySpec) { |
| DSAPrivateKeySpec dsaPrivKeySpec = (DSAPrivateKeySpec)keySpec; |
| return new DSAPrivateKey(dsaPrivKeySpec.getX(), |
| dsaPrivKeySpec.getP(), |
| dsaPrivKeySpec.getQ(), |
| dsaPrivKeySpec.getG()); |
| |
| } else if (keySpec instanceof PKCS8EncodedKeySpec) { |
| return new DSAPrivateKey |
| (((PKCS8EncodedKeySpec)keySpec).getEncoded()); |
| |
| } else { |
| throw new InvalidKeySpecException |
| ("Inappropriate key specification"); |
| } |
| } catch (InvalidKeyException e) { |
| throw new InvalidKeySpecException |
| ("Inappropriate key specification: " + e.getMessage()); |
| } |
| } |
| |
| /** |
| * Returns a specification (key material) of the given key object |
| * in the requested format. |
| * |
| * @param key the key |
| * |
| * @param keySpec the requested format in which the key material shall be |
| * returned |
| * |
| * @return the underlying key specification (key material) in the |
| * requested format |
| * |
| * @exception InvalidKeySpecException if the requested key specification is |
| * inappropriate for the given key, or the given key cannot be processed |
| * (e.g., the given key has an unrecognized algorithm or format). |
| */ |
| protected <T extends KeySpec> |
| T engineGetKeySpec(Key key, Class<T> keySpec) |
| throws InvalidKeySpecException { |
| |
| DSAParams params; |
| |
| try { |
| |
| if (key instanceof java.security.interfaces.DSAPublicKey) { |
| |
| // Determine valid key specs |
| Class<?> dsaPubKeySpec = Class.forName |
| ("java.security.spec.DSAPublicKeySpec"); |
| Class<?> x509KeySpec = Class.forName |
| ("java.security.spec.X509EncodedKeySpec"); |
| |
| if (dsaPubKeySpec.isAssignableFrom(keySpec)) { |
| java.security.interfaces.DSAPublicKey dsaPubKey |
| = (java.security.interfaces.DSAPublicKey)key; |
| params = dsaPubKey.getParams(); |
| return (T) new DSAPublicKeySpec(dsaPubKey.getY(), |
| params.getP(), |
| params.getQ(), |
| params.getG()); |
| |
| } else if (x509KeySpec.isAssignableFrom(keySpec)) { |
| return (T) new X509EncodedKeySpec(key.getEncoded()); |
| |
| } else { |
| throw new InvalidKeySpecException |
| ("Inappropriate key specification"); |
| } |
| |
| } else if (key instanceof java.security.interfaces.DSAPrivateKey) { |
| |
| // Determine valid key specs |
| Class<?> dsaPrivKeySpec = Class.forName |
| ("java.security.spec.DSAPrivateKeySpec"); |
| Class<?> pkcs8KeySpec = Class.forName |
| ("java.security.spec.PKCS8EncodedKeySpec"); |
| |
| if (dsaPrivKeySpec.isAssignableFrom(keySpec)) { |
| java.security.interfaces.DSAPrivateKey dsaPrivKey |
| = (java.security.interfaces.DSAPrivateKey)key; |
| params = dsaPrivKey.getParams(); |
| return (T) new DSAPrivateKeySpec(dsaPrivKey.getX(), |
| params.getP(), |
| params.getQ(), |
| params.getG()); |
| |
| } else if (pkcs8KeySpec.isAssignableFrom(keySpec)) { |
| return (T) new PKCS8EncodedKeySpec(key.getEncoded()); |
| |
| } else { |
| throw new InvalidKeySpecException |
| ("Inappropriate key specification"); |
| } |
| |
| } else { |
| throw new InvalidKeySpecException("Inappropriate key type"); |
| } |
| |
| } catch (ClassNotFoundException e) { |
| throw new InvalidKeySpecException |
| ("Unsupported key specification: " + e.getMessage()); |
| } |
| } |
| |
| /** |
| * Translates a key object, whose provider may be unknown or potentially |
| * untrusted, into a corresponding key object of this key factory. |
| * |
| * @param key the key whose provider is unknown or untrusted |
| * |
| * @return the translated key |
| * |
| * @exception InvalidKeyException if the given key cannot be processed by |
| * this key factory. |
| */ |
| protected Key engineTranslateKey(Key key) throws InvalidKeyException { |
| |
| try { |
| |
| if (key instanceof java.security.interfaces.DSAPublicKey) { |
| // Check if key originates from this factory |
| if (key instanceof sun.security.provider.DSAPublicKey) { |
| return key; |
| } |
| // Convert key to spec |
| DSAPublicKeySpec dsaPubKeySpec |
| = engineGetKeySpec(key, DSAPublicKeySpec.class); |
| // Create key from spec, and return it |
| return engineGeneratePublic(dsaPubKeySpec); |
| |
| } else if (key instanceof java.security.interfaces.DSAPrivateKey) { |
| // Check if key originates from this factory |
| if (key instanceof sun.security.provider.DSAPrivateKey) { |
| return key; |
| } |
| // Convert key to spec |
| DSAPrivateKeySpec dsaPrivKeySpec |
| = engineGetKeySpec(key, DSAPrivateKeySpec.class); |
| // Create key from spec, and return it |
| return engineGeneratePrivate(dsaPrivKeySpec); |
| |
| } else { |
| throw new InvalidKeyException("Wrong algorithm type"); |
| } |
| |
| } catch (InvalidKeySpecException e) { |
| throw new InvalidKeyException("Cannot translate key: " |
| + e.getMessage()); |
| } |
| } |
| } |
