/* * Copyright (c) 1997, 2009, 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 com.sun.crypto.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.spec.KeySpec;import java.security.spec.InvalidKeySpecException;import java.security.spec.X509EncodedKeySpec;import java.security.spec.PKCS8EncodedKeySpec;import javax.crypto.spec.DHPublicKeySpec;import javax.crypto.spec.DHPrivateKeySpec;import javax.crypto.spec.DHParameterSpec;/** * This class implements the Diffie-Hellman key factory of the Sun provider. * * @author Jan Luehe * */public final class DHKeyFactory extends KeyFactorySpi { /** * Empty constructor */ public DHKeyFactory() { } /** * 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 DHPublicKeySpec) { DHPublicKeySpec dhPubKeySpec = (DHPublicKeySpec)keySpec; return new DHPublicKey(dhPubKeySpec.getY(), dhPubKeySpec.getP(), dhPubKeySpec.getG()); } else if (keySpec instanceof X509EncodedKeySpec) { return new DHPublicKey (((X509EncodedKeySpec)keySpec).getEncoded()); } else { throw new InvalidKeySpecException ("Inappropriate key specification"); } } catch (InvalidKeyException e) { throw new InvalidKeySpecException ("Inappropriate key specification"); } } /** * 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 DHPrivateKeySpec) { DHPrivateKeySpec dhPrivKeySpec = (DHPrivateKeySpec)keySpec; return new DHPrivateKey(dhPrivKeySpec.getX(), dhPrivKeySpec.getP(), dhPrivKeySpec.getG()); } else if (keySpec instanceof PKCS8EncodedKeySpec) { return new DHPrivateKey (((PKCS8EncodedKeySpec)keySpec).getEncoded()); } else { throw new InvalidKeySpecException ("Inappropriate key specification"); } } catch (InvalidKeyException e) { throw new InvalidKeySpecException ("Inappropriate key specification"); } } /** * 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 KeySpec engineGetKeySpec(Key key, Class keySpec) throws InvalidKeySpecException { DHParameterSpec params; if (key instanceof javax.crypto.interfaces.DHPublicKey) { if (DHPublicKeySpec.class.isAssignableFrom(keySpec)) { javax.crypto.interfaces.DHPublicKey dhPubKey = (javax.crypto.interfaces.DHPublicKey) key; params = dhPubKey.getParams(); return new DHPublicKeySpec(dhPubKey.getY(), params.getP(), params.getG()); } else if (X509EncodedKeySpec.class.isAssignableFrom(keySpec)) { return new X509EncodedKeySpec(key.getEncoded()); } else { throw new InvalidKeySpecException ("Inappropriate key specification"); } } else if (key instanceof javax.crypto.interfaces.DHPrivateKey) { if (DHPrivateKeySpec.class.isAssignableFrom(keySpec)) { javax.crypto.interfaces.DHPrivateKey dhPrivKey = (javax.crypto.interfaces.DHPrivateKey)key; params = dhPrivKey.getParams(); return new DHPrivateKeySpec(dhPrivKey.getX(), params.getP(), params.getG()); } else if (PKCS8EncodedKeySpec.class.isAssignableFrom(keySpec)) { return new PKCS8EncodedKeySpec(key.getEncoded()); } else { throw new InvalidKeySpecException ("Inappropriate key specification"); } } else { throw new InvalidKeySpecException("Inappropriate key type"); } } /** * 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 javax.crypto.interfaces.DHPublicKey) { // Check if key originates from this factory if (key instanceof com.sun.crypto.provider.DHPublicKey) { return key; } // Convert key to spec DHPublicKeySpec dhPubKeySpec = (DHPublicKeySpec)engineGetKeySpec (key, DHPublicKeySpec.class); // Create key from spec, and return it return engineGeneratePublic(dhPubKeySpec); } else if (key instanceof javax.crypto.interfaces.DHPrivateKey) { // Check if key originates from this factory if (key instanceof com.sun.crypto.provider.DHPrivateKey) { return key; } // Convert key to spec DHPrivateKeySpec dhPrivKeySpec = (DHPrivateKeySpec)engineGetKeySpec (key, DHPrivateKeySpec.class); // Create key from spec, and return it return engineGeneratePrivate(dhPrivKeySpec); } else { throw new InvalidKeyException("Wrong algorithm type"); } } catch (InvalidKeySpecException e) { throw new InvalidKeyException("Cannot translate key"); } }}
/*
* Copyright (c) 1997, 2009, 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 com.sun.crypto.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.spec.KeySpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.X509EncodedKeySpec;
import java.security.spec.PKCS8EncodedKeySpec;
import javax.crypto.spec.DHPublicKeySpec;
import javax.crypto.spec.DHPrivateKeySpec;
import javax.crypto.spec.DHParameterSpec;
/**
* This class implements the Diffie-Hellman key factory of the Sun provider.
*
* @author Jan Luehe
*
*/
public final class DHKeyFactory extends KeyFactorySpi {
/**
* Empty constructor
*/
public DHKeyFactory() {
}
/**
* 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 DHPublicKeySpec) {
DHPublicKeySpec dhPubKeySpec = (DHPublicKeySpec)keySpec;
return new DHPublicKey(dhPubKeySpec.getY(),
dhPubKeySpec.getP(),
dhPubKeySpec.getG());
} else if (keySpec instanceof X509EncodedKeySpec) {
return new DHPublicKey
(((X509EncodedKeySpec)keySpec).getEncoded());
} else {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
} catch (InvalidKeyException e) {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
}
/**
* 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 DHPrivateKeySpec) {
DHPrivateKeySpec dhPrivKeySpec = (DHPrivateKeySpec)keySpec;
return new DHPrivateKey(dhPrivKeySpec.getX(),
dhPrivKeySpec.getP(),
dhPrivKeySpec.getG());
} else if (keySpec instanceof PKCS8EncodedKeySpec) {
return new DHPrivateKey
(((PKCS8EncodedKeySpec)keySpec).getEncoded());
} else {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
} catch (InvalidKeyException e) {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
}
/**
* 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 KeySpec engineGetKeySpec(Key key, Class keySpec)
throws InvalidKeySpecException {
DHParameterSpec params;
if (key instanceof javax.crypto.interfaces.DHPublicKey) {
if (DHPublicKeySpec.class.isAssignableFrom(keySpec)) {
javax.crypto.interfaces.DHPublicKey dhPubKey
= (javax.crypto.interfaces.DHPublicKey) key;
params = dhPubKey.getParams();
return new DHPublicKeySpec(dhPubKey.getY(),
params.getP(),
params.getG());
} else if (X509EncodedKeySpec.class.isAssignableFrom(keySpec)) {
return new X509EncodedKeySpec(key.getEncoded());
} else {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
} else if (key instanceof javax.crypto.interfaces.DHPrivateKey) {
if (DHPrivateKeySpec.class.isAssignableFrom(keySpec)) {
javax.crypto.interfaces.DHPrivateKey dhPrivKey
= (javax.crypto.interfaces.DHPrivateKey)key;
params = dhPrivKey.getParams();
return new DHPrivateKeySpec(dhPrivKey.getX(),
params.getP(),
params.getG());
} else if (PKCS8EncodedKeySpec.class.isAssignableFrom(keySpec)) {
return new PKCS8EncodedKeySpec(key.getEncoded());
} else {
throw new InvalidKeySpecException
("Inappropriate key specification");
}
} else {
throw new InvalidKeySpecException("Inappropriate key type");
}
}
/**
* 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 javax.crypto.interfaces.DHPublicKey) {
// Check if key originates from this factory
if (key instanceof com.sun.crypto.provider.DHPublicKey) {
return key;
}
// Convert key to spec
DHPublicKeySpec dhPubKeySpec
= (DHPublicKeySpec)engineGetKeySpec
(key, DHPublicKeySpec.class);
// Create key from spec, and return it
return engineGeneratePublic(dhPubKeySpec);
} else if (key instanceof javax.crypto.interfaces.DHPrivateKey) {
// Check if key originates from this factory
if (key instanceof com.sun.crypto.provider.DHPrivateKey) {
return key;
}
// Convert key to spec
DHPrivateKeySpec dhPrivKeySpec
= (DHPrivateKeySpec)engineGetKeySpec
(key, DHPrivateKeySpec.class);
// Create key from spec, and return it
return engineGeneratePrivate(dhPrivKeySpec);
} else {
throw new InvalidKeyException("Wrong algorithm type");
}
} catch (InvalidKeySpecException e) {
throw new InvalidKeyException("Cannot translate key");
}
}
}