234 lines
8.7 KiB
Java
234 lines
8.7 KiB
Java
/*
|
|
* Copyright (c) 1997, 2021, 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.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", e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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", e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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 {
|
|
DHParameterSpec params;
|
|
|
|
if (key instanceof javax.crypto.interfaces.DHPublicKey) {
|
|
|
|
if (keySpec.isAssignableFrom(DHPublicKeySpec.class)) {
|
|
javax.crypto.interfaces.DHPublicKey dhPubKey
|
|
= (javax.crypto.interfaces.DHPublicKey) key;
|
|
params = dhPubKey.getParams();
|
|
return keySpec.cast(new DHPublicKeySpec(dhPubKey.getY(),
|
|
params.getP(),
|
|
params.getG()));
|
|
|
|
} else if (keySpec.isAssignableFrom(X509EncodedKeySpec.class)) {
|
|
return keySpec.cast(new X509EncodedKeySpec(key.getEncoded()));
|
|
|
|
} else {
|
|
throw new InvalidKeySpecException
|
|
("Inappropriate key specification");
|
|
}
|
|
|
|
} else if (key instanceof javax.crypto.interfaces.DHPrivateKey) {
|
|
|
|
if (keySpec.isAssignableFrom(DHPrivateKeySpec.class)) {
|
|
javax.crypto.interfaces.DHPrivateKey dhPrivKey
|
|
= (javax.crypto.interfaces.DHPrivateKey)key;
|
|
params = dhPrivKey.getParams();
|
|
return keySpec.cast(new DHPrivateKeySpec(dhPrivKey.getX(),
|
|
params.getP(),
|
|
params.getG()));
|
|
|
|
} else if (keySpec.isAssignableFrom(PKCS8EncodedKeySpec.class)) {
|
|
return keySpec.cast(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
|
|
= 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
|
|
= 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", e);
|
|
}
|
|
}
|
|
}
|