/* * 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 javax.crypto.KeyGeneratorSpi;import javax.crypto.SecretKey;import javax.crypto.spec.DESedeKeySpec;import java.security.SecureRandom;import java.security.InvalidParameterException;import java.security.InvalidAlgorithmParameterException;import java.security.InvalidKeyException;import java.security.spec.AlgorithmParameterSpec;/** * This class generates a Triple DES key. * * @author Jan Luehe * */public final class DESedeKeyGenerator extends KeyGeneratorSpi { private SecureRandom random = null; private int keysize = 168; /** * Empty constructor */ public DESedeKeyGenerator() { } /** * Initializes this key generator. * * @param random the source of randomness for this generator */ protected void engineInit(SecureRandom random) { this.random = random; } /** * Initializes this key generator with the specified parameter * set and a user-provided source of randomness. * * @param params the key generation parameters * @param random the source of randomness for this key generator * * @exception InvalidAlgorithmParameterException if <code>params</code> is * inappropriate for this key generator */ protected void engineInit(AlgorithmParameterSpec params, SecureRandom random) throws InvalidAlgorithmParameterException { throw new InvalidAlgorithmParameterException ("Triple DES key generation does not take any parameters"); } /** * Initializes this key generator for a certain keysize, using the given * source of randomness. * * @param keysize the keysize. This is an algorithm-specific * metric specified in number of bits. A keysize with 112 bits of entropy * corresponds to a Triple DES key with 2 intermediate keys, and a keysize * with 168 bits of entropy corresponds to a Triple DES key with 3 * intermediate keys. * @param random the source of randomness for this key generator */ protected void engineInit(int keysize, SecureRandom random) { if ((keysize != 112) && (keysize != 168)) { throw new InvalidParameterException("Wrong keysize: must be " + "equal to 112 or 168"); } this.keysize = keysize; this.engineInit(random); } /** * Generates the Triple DES key. * * @return the new Triple DES key */ protected SecretKey engineGenerateKey() { if (this.random == null) { this.random = SunJCE.RANDOM; } byte[] rawkey = new byte[DESedeKeySpec.DES_EDE_KEY_LEN]; if (keysize == 168) { // 3 intermediate keys this.random.nextBytes(rawkey); // Do parity adjustment for each intermediate key DESKeyGenerator.setParityBit(rawkey, 0); DESKeyGenerator.setParityBit(rawkey, 8); DESKeyGenerator.setParityBit(rawkey, 16); } else { // 2 intermediate keys byte[] tmpkey = new byte[16]; this.random.nextBytes(tmpkey); DESKeyGenerator.setParityBit(tmpkey, 0); DESKeyGenerator.setParityBit(tmpkey, 8); System.arraycopy(tmpkey, 0, rawkey, 0, tmpkey.length); // Copy the first 8 bytes into the last System.arraycopy(tmpkey, 0, rawkey, 16, 8); java.util.Arrays.fill(tmpkey, (byte)0x00); } DESedeKey desEdeKey = null; try { desEdeKey = new DESedeKey(rawkey); } catch (InvalidKeyException ike) { // this never happens throw new RuntimeException(ike.getMessage()); } java.util.Arrays.fill(rawkey, (byte)0x00); return desEdeKey; }}
/*
* 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 javax.crypto.KeyGeneratorSpi;
import javax.crypto.SecretKey;
import javax.crypto.spec.DESedeKeySpec;
import java.security.SecureRandom;
import java.security.InvalidParameterException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.spec.AlgorithmParameterSpec;
/**
* This class generates a Triple DES key.
*
* @author Jan Luehe
*
*/
public final class DESedeKeyGenerator extends KeyGeneratorSpi {
private SecureRandom random = null;
private int keysize = 168;
/**
* Empty constructor
*/
public DESedeKeyGenerator() {
}
/**
* Initializes this key generator.
*
* @param random the source of randomness for this generator
*/
protected void engineInit(SecureRandom random) {
this.random = random;
}
/**
* Initializes this key generator with the specified parameter
* set and a user-provided source of randomness.
*
* @param params the key generation parameters
* @param random the source of randomness for this key generator
*
* @exception InvalidAlgorithmParameterException if <code>params</code> is
* inappropriate for this key generator
*/
protected void engineInit(AlgorithmParameterSpec params,
SecureRandom random)
throws InvalidAlgorithmParameterException {
throw new InvalidAlgorithmParameterException
("Triple DES key generation does not take any parameters");
}
/**
* Initializes this key generator for a certain keysize, using the given
* source of randomness.
*
* @param keysize the keysize. This is an algorithm-specific
* metric specified in number of bits. A keysize with 112 bits of entropy
* corresponds to a Triple DES key with 2 intermediate keys, and a keysize
* with 168 bits of entropy corresponds to a Triple DES key with 3
* intermediate keys.
* @param random the source of randomness for this key generator
*/
protected void engineInit(int keysize, SecureRandom random) {
if ((keysize != 112) && (keysize != 168)) {
throw new InvalidParameterException("Wrong keysize: must be "
+ "equal to 112 or 168");
}
this.keysize = keysize;
this.engineInit(random);
}
/**
* Generates the Triple DES key.
*
* @return the new Triple DES key
*/
protected SecretKey engineGenerateKey() {
if (this.random == null) {
this.random = SunJCE.RANDOM;
}
byte[] rawkey = new byte[DESedeKeySpec.DES_EDE_KEY_LEN];
if (keysize == 168) {
// 3 intermediate keys
this.random.nextBytes(rawkey);
// Do parity adjustment for each intermediate key
DESKeyGenerator.setParityBit(rawkey, 0);
DESKeyGenerator.setParityBit(rawkey, 8);
DESKeyGenerator.setParityBit(rawkey, 16);
} else {
// 2 intermediate keys
byte[] tmpkey = new byte[16];
this.random.nextBytes(tmpkey);
DESKeyGenerator.setParityBit(tmpkey, 0);
DESKeyGenerator.setParityBit(tmpkey, 8);
System.arraycopy(tmpkey, 0, rawkey, 0, tmpkey.length);
// Copy the first 8 bytes into the last
System.arraycopy(tmpkey, 0, rawkey, 16, 8);
java.util.Arrays.fill(tmpkey, (byte)0x00);
}
DESedeKey desEdeKey = null;
try {
desEdeKey = new DESedeKey(rawkey);
} catch (InvalidKeyException ike) {
// this never happens
throw new RuntimeException(ike.getMessage());
}
java.util.Arrays.fill(rawkey, (byte)0x00);
return desEdeKey;
}
}