/* * Copyright (c) 1997, 2007, 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.KeyRep;import java.security.InvalidKeyException;import javax.crypto.SecretKey;import javax.crypto.spec.DESKeySpec;/** * This class represents a DES key. * * @author Jan Luehe * */final class DESKey implements SecretKey { static final long serialVersionUID = 7724971015953279128L; private byte[] key; /** * Uses the first 8 bytes of the given key as the DES key. * * @param key the buffer with the DES key bytes. * * @exception InvalidKeyException if less than 8 bytes are available for * the key. */ DESKey(byte[] key) throws InvalidKeyException { this(key, 0); } /** * Uses the first 8 bytes in <code>key</code>, beginning at * <code>offset</code>, as the DES key * * @param key the buffer with the DES key bytes. * @param offset the offset in <code>key</code>, where the DES key bytes * start. * * @exception InvalidKeyException if less than 8 bytes are available for * the key. */ DESKey(byte[] key, int offset) throws InvalidKeyException { if (key == null || key.length - offset < DESKeySpec.DES_KEY_LEN) { throw new InvalidKeyException("Wrong key size"); } this.key = new byte[DESKeySpec.DES_KEY_LEN]; System.arraycopy(key, offset, this.key, 0, DESKeySpec.DES_KEY_LEN); DESKeyGenerator.setParityBit(this.key, 0); } public byte[] getEncoded() { // Return a copy of the key, rather than a reference, // so that the key data cannot be modified from outside return (byte[])this.key.clone(); } public String getAlgorithm() { return "DES"; } public String getFormat() { return "RAW"; } /** * Calculates a hash code value for the object. * Objects that are equal will also have the same hashcode. */ public int hashCode() { int retval = 0; for (int i = 1; i < this.key.length; i++) { retval += this.key[i] * i; } return(retval ^= "des".hashCode()); } public boolean equals(Object obj) { if (this == obj) return true; if (!(obj instanceof SecretKey)) return false; String thatAlg = ((SecretKey)obj).getAlgorithm(); if (!(thatAlg.equalsIgnoreCase("DES"))) return false; byte[] thatKey = ((SecretKey)obj).getEncoded(); boolean ret = java.util.Arrays.equals(this.key, thatKey); java.util.Arrays.fill(thatKey, (byte)0x00); return ret; } /** * readObject is called to restore the state of this key from * a stream. */ private void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException { s.defaultReadObject(); key = (byte[])key.clone(); } /** * Replace the DES key to be serialized. * * @return the standard KeyRep object to be serialized * * @throws java.io.ObjectStreamException if a new object representing * this DES key could not be created */ private Object writeReplace() throws java.io.ObjectStreamException { return new KeyRep(KeyRep.Type.SECRET, getAlgorithm(), getFormat(), getEncoded()); } /** * Ensures that the bytes of this key are * set to zero when there are no more references to it. */ protected void finalize() throws Throwable { try { if (this.key != null) { java.util.Arrays.fill(this.key, (byte)0x00); this.key = null; } } finally { super.finalize(); } }}
/*
* Copyright (c) 1997, 2007, 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.KeyRep;
import java.security.InvalidKeyException;
import javax.crypto.SecretKey;
import javax.crypto.spec.DESKeySpec;
/**
* This class represents a DES key.
*
* @author Jan Luehe
*
*/
final class DESKey implements SecretKey {
static final long serialVersionUID = 7724971015953279128L;
private byte[] key;
/**
* Uses the first 8 bytes of the given key as the DES key.
*
* @param key the buffer with the DES key bytes.
*
* @exception InvalidKeyException if less than 8 bytes are available for
* the key.
*/
DESKey(byte[] key) throws InvalidKeyException {
this(key, 0);
}
/**
* Uses the first 8 bytes in <code>key</code>, beginning at
* <code>offset</code>, as the DES key
*
* @param key the buffer with the DES key bytes.
* @param offset the offset in <code>key</code>, where the DES key bytes
* start.
*
* @exception InvalidKeyException if less than 8 bytes are available for
* the key.
*/
DESKey(byte[] key, int offset) throws InvalidKeyException {
if (key == null || key.length - offset < DESKeySpec.DES_KEY_LEN) {
throw new InvalidKeyException("Wrong key size");
}
this.key = new byte[DESKeySpec.DES_KEY_LEN];
System.arraycopy(key, offset, this.key, 0, DESKeySpec.DES_KEY_LEN);
DESKeyGenerator.setParityBit(this.key, 0);
}
public byte[] getEncoded() {
// Return a copy of the key, rather than a reference,
// so that the key data cannot be modified from outside
return (byte[])this.key.clone();
}
public String getAlgorithm() {
return "DES";
}
public String getFormat() {
return "RAW";
}
/**
* Calculates a hash code value for the object.
* Objects that are equal will also have the same hashcode.
*/
public int hashCode() {
int retval = 0;
for (int i = 1; i < this.key.length; i++) {
retval += this.key[i] * i;
}
return(retval ^= "des".hashCode());
}
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!(obj instanceof SecretKey))
return false;
String thatAlg = ((SecretKey)obj).getAlgorithm();
if (!(thatAlg.equalsIgnoreCase("DES")))
return false;
byte[] thatKey = ((SecretKey)obj).getEncoded();
boolean ret = java.util.Arrays.equals(this.key, thatKey);
java.util.Arrays.fill(thatKey, (byte)0x00);
return ret;
}
/**
* readObject is called to restore the state of this key from
* a stream.
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException
{
s.defaultReadObject();
key = (byte[])key.clone();
}
/**
* Replace the DES key to be serialized.
*
* @return the standard KeyRep object to be serialized
*
* @throws java.io.ObjectStreamException if a new object representing
* this DES key could not be created
*/
private Object writeReplace() throws java.io.ObjectStreamException {
return new KeyRep(KeyRep.Type.SECRET,
getAlgorithm(),
getFormat(),
getEncoded());
}
/**
* Ensures that the bytes of this key are
* set to zero when there are no more references to it.
*/
protected void finalize() throws Throwable {
try {
if (this.key != null) {
java.util.Arrays.fill(this.key, (byte)0x00);
this.key = null;
}
} finally {
super.finalize();
}
}
}