--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/javax/crypto/spec/RC5ParameterSpec.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,203 @@
+/*
+ * Copyright (c) 1998, 2013, 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 javax.crypto.spec;
+
+import java.security.spec.AlgorithmParameterSpec;
+
+/**
+ * This class specifies the parameters used with the
+ * <a href="http://www.ietf.org/rfc/rfc2040.txt"><i>RC5</i></a>
+ * algorithm.
+ *
+ * <p> The parameters consist of a version number, a rounds count, a word
+ * size, and optionally an initialization vector (IV) (only in feedback mode).
+ *
+ * <p> This class can be used to initialize a <code>Cipher</code> object that
+ * implements the <i>RC5</i> algorithm as supplied by
+ * <a href="http://www.rsasecurity.com">RSA Security Inc.</a>,
+ * or any parties authorized by RSA Security.
+ *
+ * @author Jan Luehe
+ *
+ * @since 1.4
+ */
+public class RC5ParameterSpec implements AlgorithmParameterSpec {
+
+ private byte[] iv = null;
+ private int version;
+ private int rounds;
+ private int wordSize; // the word size in bits
+
+ /**
+ * Constructs a parameter set for RC5 from the given version, number of
+ * rounds and word size (in bits).
+ *
+ * @param version the version.
+ * @param rounds the number of rounds.
+ * @param wordSize the word size in bits.
+ */
+ public RC5ParameterSpec(int version, int rounds, int wordSize) {
+ this.version = version;
+ this.rounds = rounds;
+ this.wordSize = wordSize;
+ }
+
+ /**
+ * Constructs a parameter set for RC5 from the given version, number of
+ * rounds, word size (in bits), and IV.
+ *
+ * <p> Note that the size of the IV (block size) must be twice the word
+ * size. The bytes that constitute the IV are those between
+ * <code>iv[0]</code> and <code>iv[2*(wordSize/8)-1]</code> inclusive.
+ *
+ * @param version the version.
+ * @param rounds the number of rounds.
+ * @param wordSize the word size in bits.
+ * @param iv the buffer with the IV. The first <code>2*(wordSize/8)
+ * </code> bytes of the buffer are copied to protect against subsequent
+ * modification.
+ * @exception IllegalArgumentException if <code>iv</code> is
+ * <code>null</code> or {@code (iv.length < 2 * (wordSize / 8))}
+ */
+ public RC5ParameterSpec(int version, int rounds, int wordSize, byte[] iv) {
+ this(version, rounds, wordSize, iv, 0);
+ }
+
+ /**
+ * Constructs a parameter set for RC5 from the given version, number of
+ * rounds, word size (in bits), and IV.
+ *
+ * <p> The IV is taken from <code>iv</code>, starting at
+ * <code>offset</code> inclusive.
+ * Note that the size of the IV (block size), starting at
+ * <code>offset</code> inclusive, must be twice the word size.
+ * The bytes that constitute the IV are those between
+ * <code>iv[offset]</code> and <code>iv[offset+2*(wordSize/8)-1]</code>
+ * inclusive.
+ *
+ * @param version the version.
+ * @param rounds the number of rounds.
+ * @param wordSize the word size in bits.
+ * @param iv the buffer with the IV. The first <code>2*(wordSize/8)
+ * </code> bytes of the buffer beginning at <code>offset</code>
+ * inclusive are copied to protect against subsequent modification.
+ * @param offset the offset in <code>iv</code> where the IV starts.
+ * @exception IllegalArgumentException if <code>iv</code> is
+ * <code>null</code> or
+ * {@code (iv.length - offset < 2 * (wordSize / 8))}
+ */
+ public RC5ParameterSpec(int version, int rounds, int wordSize,
+ byte[] iv, int offset) {
+ this.version = version;
+ this.rounds = rounds;
+ this.wordSize = wordSize;
+ if (iv == null) throw new IllegalArgumentException("IV missing");
+ int blockSize = (wordSize / 8) * 2;
+ if (iv.length - offset < blockSize) {
+ throw new IllegalArgumentException("IV too short");
+ }
+ this.iv = new byte[blockSize];
+ System.arraycopy(iv, offset, this.iv, 0, blockSize);
+ }
+
+ /**
+ * Returns the version.
+ *
+ * @return the version.
+ */
+ public int getVersion() {
+ return this.version;
+ }
+
+ /**
+ * Returns the number of rounds.
+ *
+ * @return the number of rounds.
+ */
+ public int getRounds() {
+ return this.rounds;
+ }
+
+ /**
+ * Returns the word size in bits.
+ *
+ * @return the word size in bits.
+ */
+ public int getWordSize() {
+ return this.wordSize;
+ }
+
+ /**
+ * Returns the IV or null if this parameter set does not contain an IV.
+ *
+ * @return the IV or null if this parameter set does not contain an IV.
+ * Returns a new array each time this method is called.
+ */
+ public byte[] getIV() {
+ return (iv == null? null:iv.clone());
+ }
+
+ /**
+ * Tests for equality between the specified object and this
+ * object. Two RC5ParameterSpec objects are considered equal if their
+ * version numbers, number of rounds, word sizes, and IVs are equal.
+ * (Two IV references are considered equal if both are <tt>null</tt>.)
+ *
+ * @param obj the object to test for equality with this object.
+ *
+ * @return true if the objects are considered equal, false if
+ * <code>obj</code> is null or otherwise.
+ */
+ public boolean equals(Object obj) {
+ if (obj == this) {
+ return true;
+ }
+ if (!(obj instanceof RC5ParameterSpec)) {
+ return false;
+ }
+ RC5ParameterSpec other = (RC5ParameterSpec) obj;
+
+ return ((version == other.version) &&
+ (rounds == other.rounds) &&
+ (wordSize == other.wordSize) &&
+ java.util.Arrays.equals(iv, other.iv));
+ }
+
+ /**
+ * Calculates a hash code value for the object.
+ * Objects that are equal will also have the same hashcode.
+ */
+ public int hashCode() {
+ int retval = 0;
+ if (iv != null) {
+ for (int i = 1; i < iv.length; i++) {
+ retval += iv[i] * i;
+ }
+ }
+ retval += (version + rounds + wordSize);
+ return retval;
+ }
+}