| /* |
| * Copyright (c) 1997, 2017, 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.MessageDigest; |
| import java.security.KeyRep; |
| import java.security.InvalidKeyException; |
| import javax.crypto.SecretKey; |
| import javax.crypto.spec.DESKeySpec; |
| |
| import jdk.internal.ref.CleanerFactory; |
| |
| /** |
| * 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); |
| |
| // Use the cleaner to zero the key when no longer referenced |
| final byte[] k = this.key; |
| CleanerFactory.cleaner().register(this, |
| () -> java.util.Arrays.fill(k, (byte)0x00)); |
| } |
| |
| public byte[] getEncoded() { |
| // Return a copy of the key, rather than a reference, |
| // so that the key data cannot be modified from outside |
| return 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 = MessageDigest.isEqual(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 = 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()); |
| } |
| } |