| /* |
| * Copyright (c) 1997, 2015, 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.DESedeKeySpec; |
| |
| /** |
| * This class represents a DES-EDE key. |
| * |
| * @author Jan Luehe |
| * |
| */ |
| |
| final class DESedeKey implements SecretKey { |
| |
| static final long serialVersionUID = 2463986565756745178L; |
| |
| private byte[] key; |
| |
| /** |
| * Creates a DES-EDE key from a given key. |
| * |
| * @param key the given key |
| * |
| * @exception InvalidKeyException if the given key has a wrong size |
| */ |
| DESedeKey(byte[] key) throws InvalidKeyException { |
| this(key, 0); |
| } |
| |
| /** |
| * Uses the first 24 bytes in <code>key</code>, beginning at |
| * <code>offset</code>, as the DES-EDE key |
| * |
| * @param key the buffer with the DES-EDE key |
| * @param offset the offset in <code>key</code>, where the DES-EDE key |
| * starts |
| * |
| * @exception InvalidKeyException if the given key has a wrong size |
| */ |
| DESedeKey(byte[] key, int offset) throws InvalidKeyException { |
| |
| if (key==null || ((key.length-offset)<DESedeKeySpec.DES_EDE_KEY_LEN)) { |
| throw new InvalidKeyException("Wrong key size"); |
| } |
| this.key = new byte[DESedeKeySpec.DES_EDE_KEY_LEN]; |
| System.arraycopy(key, offset, this.key, 0, |
| DESedeKeySpec.DES_EDE_KEY_LEN); |
| DESKeyGenerator.setParityBit(this.key, 0); |
| DESKeyGenerator.setParityBit(this.key, 8); |
| DESKeyGenerator.setParityBit(this.key, 16); |
| } |
| |
| public byte[] getEncoded() { |
| return this.key.clone(); |
| } |
| |
| public String getAlgorithm() { |
| return "DESede"; |
| } |
| |
| 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 ^= "desede".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("DESede")) |
| && !(thatAlg.equalsIgnoreCase("TripleDES"))) |
| 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 DESede key to be serialized. |
| * |
| * @return the standard KeyRep object to be serialized |
| * |
| * @throws java.io.ObjectStreamException if a new object representing |
| * this DESede 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(); |
| } |
| } |
| } |