My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

Showing the changes to java/pkg/com/sun/crypto/provider/DESedeKeyGenerator.java (1 of 18352 files). Show all

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java/pkg/com/sun/crypto/provider/DESedeKeyGenerator.java+145−0

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	1	+/*
	2	+ * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved.
	3	+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	4	+ *
	5	+ * This code is free software; you can redistribute it and/or modify it
	6	+ * under the terms of the GNU General Public License version 2 only, as
	7	+ * published by the Free Software Foundation. Oracle designates this
	8	+ * particular file as subject to the "Classpath" exception as provided
	9	+ * by Oracle in the LICENSE file that accompanied this code.
	10	+ *
	11	+ * This code is distributed in the hope that it will be useful, but WITHOUT
	12	+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	14	+ * version 2 for more details (a copy is included in the LICENSE file that
	15	+ * accompanied this code).
	16	+ *
	17	+ * You should have received a copy of the GNU General Public License version
	18	+ * 2 along with this work; if not, write to the Free Software Foundation,
	19	+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	20	+ *
	21	+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	22	+ * or visit www.oracle.com if you need additional information or have any
	23	+ * questions.
	24	+ */
	25	+
	26	+package com.sun.crypto.provider;
	27	+
	28	+import javax.crypto.KeyGeneratorSpi;
	29	+import javax.crypto.SecretKey;
	30	+import javax.crypto.spec.DESedeKeySpec;
	31	+import java.security.SecureRandom;
	32	+import java.security.InvalidParameterException;
	33	+import java.security.InvalidAlgorithmParameterException;
	34	+import java.security.InvalidKeyException;
	35	+import java.security.spec.AlgorithmParameterSpec;
	36	+
	37	+/**
	38	+ * This class generates a Triple DES key.
	39	+ *
	40	+ * @author Jan Luehe
	41	+ *
	42	+ */
	43	+
	44	+public final class DESedeKeyGenerator extends KeyGeneratorSpi {
	45	+
	46	+ private SecureRandom random = null;
	47	+ private int keysize = 168;
	48	+
	49	+ /**
	50	+ * Empty constructor
	51	+ */
	52	+ public DESedeKeyGenerator() {
	53	+ }
	54	+
	55	+ /**
	56	+ * Initializes this key generator.
	57	+ *
	58	+ * @param random the source of randomness for this generator
	59	+ */
	60	+ protected void engineInit(SecureRandom random) {
	61	+ this.random = random;
	62	+ }
	63	+
	64	+ /**
	65	+ * Initializes this key generator with the specified parameter
	66	+ * set and a user-provided source of randomness.
	67	+ *
	68	+ * @param params the key generation parameters
	69	+ * @param random the source of randomness for this key generator
	70	+ *
	71	+ * @exception InvalidAlgorithmParameterException if <code>params</code> is
	72	+ * inappropriate for this key generator
	73	+ */
	74	+ protected void engineInit(AlgorithmParameterSpec params,
	75	+ SecureRandom random)
	76	+ throws InvalidAlgorithmParameterException {
	77	+ throw new InvalidAlgorithmParameterException
	78	+ ("Triple DES key generation does not take any parameters");
	79	+ }
	80	+
	81	+ /**
	82	+ * Initializes this key generator for a certain keysize, using the given
	83	+ * source of randomness.
	84	+ *
	85	+ * @param keysize the keysize. This is an algorithm-specific
	86	+ * metric specified in number of bits. A keysize with 112 bits of entropy
	87	+ * corresponds to a Triple DES key with 2 intermediate keys, and a keysize
	88	+ * with 168 bits of entropy corresponds to a Triple DES key with 3
	89	+ * intermediate keys.
	90	+ * @param random the source of randomness for this key generator
	91	+ */
	92	+ protected void engineInit(int keysize, SecureRandom random) {
	93	+ if ((keysize != 112) && (keysize != 168)) {
	94	+ throw new InvalidParameterException("Wrong keysize: must be "
	95	+ + "equal to 112 or 168");
	96	+ }
	97	+ this.keysize = keysize;
	98	+ this.engineInit(random);
	99	+ }
	100	+
	101	+ /**
	102	+ * Generates the Triple DES key.
	103	+ *
	104	+ * @return the new Triple DES key
	105	+ */
	106	+ protected SecretKey engineGenerateKey() {
	107	+ if (this.random == null) {
	108	+ this.random = SunJCE.RANDOM;
	109	+ }
	110	+
	111	+ byte[] rawkey = new byte[DESedeKeySpec.DES_EDE_KEY_LEN];
	112	+
	113	+ if (keysize == 168) {
	114	+ // 3 intermediate keys
	115	+ this.random.nextBytes(rawkey);
	116	+
	117	+ // Do parity adjustment for each intermediate key
	118	+ DESKeyGenerator.setParityBit(rawkey, 0);
	119	+ DESKeyGenerator.setParityBit(rawkey, 8);
	120	+ DESKeyGenerator.setParityBit(rawkey, 16);
	121	+ } else {
	122	+ // 2 intermediate keys
	123	+ byte[] tmpkey = new byte[16];
	124	+ this.random.nextBytes(tmpkey);
	125	+ DESKeyGenerator.setParityBit(tmpkey, 0);
	126	+ DESKeyGenerator.setParityBit(tmpkey, 8);
	127	+ System.arraycopy(tmpkey, 0, rawkey, 0, tmpkey.length);
	128	+ // Copy the first 8 bytes into the last
	129	+ System.arraycopy(tmpkey, 0, rawkey, 16, 8);
	130	+ java.util.Arrays.fill(tmpkey, (byte)0x00);
	131	+ }
	132	+
	133	+ DESedeKey desEdeKey = null;
	134	+ try {
	135	+ desEdeKey = new DESedeKey(rawkey);
	136	+ } catch (InvalidKeyException ike) {
	137	+ // this never happens
	138	+ throw new RuntimeException(ike.getMessage());
	139	+ }
	140	+
	141	+ java.util.Arrays.fill(rawkey, (byte)0x00);
	142	+
	143	+ return desEdeKey;
	144	+ }
	145	+}