diff options
| author | Andrew Haley <aph@redhat.com> | 2016-09-30 16:24:48 +0000 |
|---|---|---|
| committer | Andrew Haley <aph@gcc.gnu.org> | 2016-09-30 16:24:48 +0000 |
| commit | 07b78716af6a9d7c9fd1e94d9baf94a52c873947 (patch) | |
| tree | 3f22b3241c513ad168c8353805614ae1249410f4 /libjava/classpath/javax/crypto/spec/DESKeySpec.java | |
| parent | eae993948bae8b788c53772bcb9217c063716f93 (diff) | |
| download | gcc-07b78716af6a9d7c9fd1e94d9baf94a52c873947.zip gcc-07b78716af6a9d7c9fd1e94d9baf94a52c873947.tar.gz gcc-07b78716af6a9d7c9fd1e94d9baf94a52c873947.tar.bz2 | |
Makefile.def: Remove libjava.
2016-09-30 Andrew Haley <aph@redhat.com>
* Makefile.def: Remove libjava.
* Makefile.tpl: Likewise.
* Makefile.in: Regenerate.
* configure.ac: Likewise.
* configure: Likewise.
* gcc/java: Remove.
* libjava: Likewise.
From-SVN: r240662
Diffstat (limited to 'libjava/classpath/javax/crypto/spec/DESKeySpec.java')
| -rw-r--r-- | libjava/classpath/javax/crypto/spec/DESKeySpec.java | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/libjava/classpath/javax/crypto/spec/DESKeySpec.java b/libjava/classpath/javax/crypto/spec/DESKeySpec.java deleted file mode 100644 index 9075a77..0000000 --- a/libjava/classpath/javax/crypto/spec/DESKeySpec.java +++ /dev/null @@ -1,220 +0,0 @@ -/* DESKeySpec -- Keys for DES. - Copyright (C) 2004 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package javax.crypto.spec; - -import java.security.InvalidKeyException; -import java.security.spec.KeySpec; - -/** - * This class is a transparent wrapper for DES keys, which are arrays - * of 8 bytes. - * - * @author Casey Marshall (csm@gnu.org) - * @since 1.4 - */ -public class DESKeySpec implements KeySpec -{ - - // Constants. - // ------------------------------------------------------------------------ - - /** - * The length of a DES key, in bytes. - */ - public static final int DES_KEY_LEN = 8; - - /** - * The key bytes. - */ - private byte[] key; - - // Constructors. - // ------------------------------------------------------------------------ - - /** - * Create a new DES key spec, copying the first 8 bytes from the - * byte array. - * - * @param key The key bytes. - * @throws java.security.InvalidKeyException If there are less than 8 - * bytes in the array. - */ - public DESKeySpec(byte[] key) throws InvalidKeyException - { - this(key, 0); - } - - /** - * Create a new DES key spec, starting at <code>offset</code> in - * the byte array. The first 8 bytes starting at <code>offset</code> - * are copied. - * - * @param key The key bytes. - * @param offset The offset into the byte array at which to begin. - * @throws java.security.InvalidKeyException If there are less than 8 - * bytes starting at <code>offset</code>. - */ - public DESKeySpec(byte[] key, int offset) throws InvalidKeyException - { - if (key.length - offset < DES_KEY_LEN) - { - throw new InvalidKeyException("DES keys must be 8 bytes long"); - } - this.key = new byte[DES_KEY_LEN]; - System.arraycopy(key, offset, this.key, 0, DES_KEY_LEN); - } - - // Class methods. - // ------------------------------------------------------------------------ - - /** - * Returns whether or not the given key is <i>parity adjusted</i>; - * i.e. every byte in the key has an odd number of "1" bits. - * - * @param key The key bytes, considered between <code>[offset, - * offset+7]</code> - * @param offset The offset into the byte array at which to begin. - * @return True if all bytes have an odd number of "1" bits. - * @throws java.security.InvalidKeyException If there are not enough - * bytes in the array. - */ - public static boolean isParityAdjusted(byte[] key, int offset) - throws InvalidKeyException - { - if (key.length - offset < DES_KEY_LEN) - { - throw new InvalidKeyException("DES keys must be 8 bytes long"); - } - boolean parity = false; - boolean oddbits = false; - for (int i = 0; i < DES_KEY_LEN; i++) - { - oddbits = false; - for (int j = 0; j < 8; j++) - { - oddbits ^= (key[i+offset] & 1 << j) != 0; - } - parity &= oddbits; - } - return parity; - } - - /** - * One-half of the weak and semiweak DES keys (the other half are the - * complements of these). - */ - private static final byte[][] WEAK_KEYS = new byte[][] { - { 0, 0, 0, 0, 0, 0, 0, 0 }, // 0000 0000 0000 0000 - { -1, -1, -1, -1, 0, 0, 0, 0 }, // ffff ffff 0000 0000 - { 1, 1, 1, 1, 1, 1, 1, 1 }, // 0101 0101 0101 0101 - { 31, 31, 31, 31, 14, 14, 14, 14 }, // 1f1f 1f1f 0e0e 0e0e - { 1, -2, 1, -2, 1, -2, 1, -2 }, // 01fe 01fe 01fe 01fe - { 31, -32, 31, -32, -32, 31, -32, 31 }, // 1fe0 1fe0 0e1f 0e1f - { 1, -32, 1, -32, 1, -15, 1, -15 }, // 01e0 01e0 01f1 01f1 - { 31, -2, 31, -2, 14, -2, 14, -2 }, // 1ffe 1ffe 0efe 0efe - { 1, 31, 1, 31, 1, 14, 1, 14 }, // 011f 011f 010e 010e - { -32, -2, -32, -2, -15, -2, -15, -2 }, // e0fe e0fe f1fe f1fe - }; - - /** - * Tests if the bytes between <code>[offset, offset+7]</code> - * constitute a weak or semi-weak DES key. - * - * @param key The key bytes to check. - * @param offset The offset in the byte array to start. - * @return true If the key bytes are a weak key. - */ - public static boolean isWeak(byte[] key, int offset) - throws InvalidKeyException - { - if (key.length - offset < DES_KEY_LEN) - { - throw new InvalidKeyException("DES keys must be 8 bytes long"); - } - for (int i = 0; i < WEAK_KEYS.length; i++) - { - if (equalsOrComplementEquals(key, offset, WEAK_KEYS[i])) - { - return true; - } - } - return false; - } - - /** - * This method returns true if the first 8 bytes starting at - * <code>off</code> in <code>a</code> equal the first 8 bytes in - * <code>b</code>, or equal the <i>complement</i> of the first 8 bytes - * in <code>b</code>. - * - * @param a The first byte array. - * @param off The index into the first byte array. - * @param b The second byte array. - * @return <code>a == b || a == ~b</code> - */ - private static boolean equalsOrComplementEquals(byte[] a, int off, byte[] b) - { - boolean result = true; - for (int i = 0; i < DES_KEY_LEN; i++) - { - result &= a[off+i] == b[i]; - } - if (result) return true; - result = true; - for (int i = 0; i < DES_KEY_LEN; i++) - { - result &= a[off+i] == (~b[i]); - } - return result; - } - - // Instance methods. - // ------------------------------------------------------------------------ - - /** - * Return the key as a byte array. This method does not copy the byte - * array. - * - * @return The key bytes. - */ - public byte[] getKey() - { - return key; - } -} |