diff options
Diffstat (limited to 'libjava/classpath/gnu/javax/crypto/cipher/DES.java')
-rw-r--r-- | libjava/classpath/gnu/javax/crypto/cipher/DES.java | 758 |
1 files changed, 258 insertions, 500 deletions
diff --git a/libjava/classpath/gnu/javax/crypto/cipher/DES.java b/libjava/classpath/gnu/javax/crypto/cipher/DES.java index 8b7627ceaf8..3ced62c3f40 100644 --- a/libjava/classpath/gnu/javax/crypto/cipher/DES.java +++ b/libjava/classpath/gnu/javax/crypto/cipher/DES.java @@ -48,353 +48,169 @@ import java.util.Collections; import java.util.Iterator; /** - * <p>The Data Encryption Standard. DES is a 64-bit block cipher with a 56-bit + * The Data Encryption Standard. DES is a 64-bit block cipher with a 56-bit * key, developed by IBM in the 1970's for the standardization process begun by - * the National Bureau of Standards (now NIST).</p> - * - * <p>New applications should not use DES except for compatibility.</p> - * - * <p>This version is based upon the description and sample implementation in - * [1].</p> - * - * <p>References:</p> + * the National Bureau of Standards (now NIST). + * <p> + * New applications should not use DES except for compatibility. + * <p> + * This version is based upon the description and sample implementation in + * [1]. + * <p> + * References: * <ol> * <li>Bruce Schneier, <i>Applied Cryptography: Protocols, Algorithms, and * Source Code in C, Second Edition</i>. (1996 John Wiley and Sons) ISBN * 0-471-11709-9. Pages 265--301, 623--632.</li> * </ol> */ -public class DES extends BaseCipher +public class DES + extends BaseCipher { - - // Constants and variables - // ------------------------------------------------------------------------- - /** DES operates on 64 bit blocks. */ public static final int BLOCK_SIZE = 8; - /** DES uses 56 bits of a 64 bit parity-adjusted key. */ public static final int KEY_SIZE = 8; - // S-Boxes 1 through 8. - private static final int[] SP1 = new int[] { 0x01010400, 0x00000000, - 0x00010000, 0x01010404, - 0x01010004, 0x00010404, - 0x00000004, 0x00010000, - 0x00000400, 0x01010400, - 0x01010404, 0x00000400, - 0x01000404, 0x01010004, - 0x01000000, 0x00000004, - 0x00000404, 0x01000400, - 0x01000400, 0x00010400, - 0x00010400, 0x01010000, - 0x01010000, 0x01000404, - 0x00010004, 0x01000004, - 0x01000004, 0x00010004, - 0x00000000, 0x00000404, - 0x00010404, 0x01000000, - 0x00010000, 0x01010404, - 0x00000004, 0x01010000, - 0x01010400, 0x01000000, - 0x01000000, 0x00000400, - 0x01010004, 0x00010000, - 0x00010400, 0x01000004, - 0x00000400, 0x00000004, - 0x01000404, 0x00010404, - 0x01010404, 0x00010004, - 0x01010000, 0x01000404, - 0x01000004, 0x00000404, - 0x00010404, 0x01010400, - 0x00000404, 0x01000400, - 0x01000400, 0x00000000, - 0x00010004, 0x00010400, - 0x00000000, 0x01010004 }; - - private static final int[] SP2 = new int[] { 0x80108020, 0x80008000, - 0x00008000, 0x00108020, - 0x00100000, 0x00000020, - 0x80100020, 0x80008020, - 0x80000020, 0x80108020, - 0x80108000, 0x80000000, - 0x80008000, 0x00100000, - 0x00000020, 0x80100020, - 0x00108000, 0x00100020, - 0x80008020, 0x00000000, - 0x80000000, 0x00008000, - 0x00108020, 0x80100000, - 0x00100020, 0x80000020, - 0x00000000, 0x00108000, - 0x00008020, 0x80108000, - 0x80100000, 0x00008020, - 0x00000000, 0x00108020, - 0x80100020, 0x00100000, - 0x80008020, 0x80100000, - 0x80108000, 0x00008000, - 0x80100000, 0x80008000, - 0x00000020, 0x80108020, - 0x00108020, 0x00000020, - 0x00008000, 0x80000000, - 0x00008020, 0x80108000, - 0x00100000, 0x80000020, - 0x00100020, 0x80008020, - 0x80000020, 0x00100020, - 0x00108000, 0x00000000, - 0x80008000, 0x00008020, - 0x80000000, 0x80100020, - 0x80108020, 0x00108000 }; - - private static final int[] SP3 = new int[] { 0x00000208, 0x08020200, - 0x00000000, 0x08020008, - 0x08000200, 0x00000000, - 0x00020208, 0x08000200, - 0x00020008, 0x08000008, - 0x08000008, 0x00020000, - 0x08020208, 0x00020008, - 0x08020000, 0x00000208, - 0x08000000, 0x00000008, - 0x08020200, 0x00000200, - 0x00020200, 0x08020000, - 0x08020008, 0x00020208, - 0x08000208, 0x00020200, - 0x00020000, 0x08000208, - 0x00000008, 0x08020208, - 0x00000200, 0x08000000, - 0x08020200, 0x08000000, - 0x00020008, 0x00000208, - 0x00020000, 0x08020200, - 0x08000200, 0x00000000, - 0x00000200, 0x00020008, - 0x08020208, 0x08000200, - 0x08000008, 0x00000200, - 0x00000000, 0x08020008, - 0x08000208, 0x00020000, - 0x08000000, 0x08020208, - 0x00000008, 0x00020208, - 0x00020200, 0x08000008, - 0x08020000, 0x08000208, - 0x00000208, 0x08020000, - 0x00020208, 0x00000008, - 0x08020008, 0x00020200 }; - - private static final int[] SP4 = new int[] { 0x00802001, 0x00002081, - 0x00002081, 0x00000080, - 0x00802080, 0x00800081, - 0x00800001, 0x00002001, - 0x00000000, 0x00802000, - 0x00802000, 0x00802081, - 0x00000081, 0x00000000, - 0x00800080, 0x00800001, - 0x00000001, 0x00002000, - 0x00800000, 0x00802001, - 0x00000080, 0x00800000, - 0x00002001, 0x00002080, - 0x00800081, 0x00000001, - 0x00002080, 0x00800080, - 0x00002000, 0x00802080, - 0x00802081, 0x00000081, - 0x00800080, 0x00800001, - 0x00802000, 0x00802081, - 0x00000081, 0x00000000, - 0x00000000, 0x00802000, - 0x00002080, 0x00800080, - 0x00800081, 0x00000001, - 0x00802001, 0x00002081, - 0x00002081, 0x00000080, - 0x00802081, 0x00000081, - 0x00000001, 0x00002000, - 0x00800001, 0x00002001, - 0x00802080, 0x00800081, - 0x00002001, 0x00002080, - 0x00800000, 0x00802001, - 0x00000080, 0x00800000, - 0x00002000, 0x00802080 }; - - private static final int[] SP5 = new int[] { 0x00000100, 0x02080100, - 0x02080000, 0x42000100, - 0x00080000, 0x00000100, - 0x40000000, 0x02080000, - 0x40080100, 0x00080000, - 0x02000100, 0x40080100, - 0x42000100, 0x42080000, - 0x00080100, 0x40000000, - 0x02000000, 0x40080000, - 0x40080000, 0x00000000, - 0x40000100, 0x42080100, - 0x42080100, 0x02000100, - 0x42080000, 0x40000100, - 0x00000000, 0x42000000, - 0x02080100, 0x02000000, - 0x42000000, 0x00080100, - 0x00080000, 0x42000100, - 0x00000100, 0x02000000, - 0x40000000, 0x02080000, - 0x42000100, 0x40080100, - 0x02000100, 0x40000000, - 0x42080000, 0x02080100, - 0x40080100, 0x00000100, - 0x02000000, 0x42080000, - 0x42080100, 0x00080100, - 0x42000000, 0x42080100, - 0x02080000, 0x00000000, - 0x40080000, 0x42000000, - 0x00080100, 0x02000100, - 0x40000100, 0x00080000, - 0x00000000, 0x40080000, - 0x02080100, 0x40000100 }; - - private static final int[] SP6 = new int[] { 0x20000010, 0x20400000, - 0x00004000, 0x20404010, - 0x20400000, 0x00000010, - 0x20404010, 0x00400000, - 0x20004000, 0x00404010, - 0x00400000, 0x20000010, - 0x00400010, 0x20004000, - 0x20000000, 0x00004010, - 0x00000000, 0x00400010, - 0x20004010, 0x00004000, - 0x00404000, 0x20004010, - 0x00000010, 0x20400010, - 0x20400010, 0x00000000, - 0x00404010, 0x20404000, - 0x00004010, 0x00404000, - 0x20404000, 0x20000000, - 0x20004000, 0x00000010, - 0x20400010, 0x00404000, - 0x20404010, 0x00400000, - 0x00004010, 0x20000010, - 0x00400000, 0x20004000, - 0x20000000, 0x00004010, - 0x20000010, 0x20404010, - 0x00404000, 0x20400000, - 0x00404010, 0x20404000, - 0x00000000, 0x20400010, - 0x00000010, 0x00004000, - 0x20400000, 0x00404010, - 0x00004000, 0x00400010, - 0x20004010, 0x00000000, - 0x20404000, 0x20000000, - 0x00400010, 0x20004010 }; - - private static final int[] SP7 = new int[] { 0x00200000, 0x04200002, - 0x04000802, 0x00000000, - 0x00000800, 0x04000802, - 0x00200802, 0x04200800, - 0x04200802, 0x00200000, - 0x00000000, 0x04000002, - 0x00000002, 0x04000000, - 0x04200002, 0x00000802, - 0x04000800, 0x00200802, - 0x00200002, 0x04000800, - 0x04000002, 0x04200000, - 0x04200800, 0x00200002, - 0x04200000, 0x00000800, - 0x00000802, 0x04200802, - 0x00200800, 0x00000002, - 0x04000000, 0x00200800, - 0x04000000, 0x00200800, - 0x00200000, 0x04000802, - 0x04000802, 0x04200002, - 0x04200002, 0x00000002, - 0x00200002, 0x04000000, - 0x04000800, 0x00200000, - 0x04200800, 0x00000802, - 0x00200802, 0x04200800, - 0x00000802, 0x04000002, - 0x04200802, 0x04200000, - 0x00200800, 0x00000000, - 0x00000002, 0x04200802, - 0x00000000, 0x00200802, - 0x04200000, 0x00000800, - 0x04000002, 0x04000800, - 0x00000800, 0x00200002 }; - - private static final int[] SP8 = new int[] { 0x10001040, 0x00001000, - 0x00040000, 0x10041040, - 0x10000000, 0x10001040, - 0x00000040, 0x10000000, - 0x00040040, 0x10040000, - 0x10041040, 0x00041000, - 0x10041000, 0x00041040, - 0x00001000, 0x00000040, - 0x10040000, 0x10000040, - 0x10001000, 0x00001040, - 0x00041000, 0x00040040, - 0x10040040, 0x10041000, - 0x00001040, 0x00000000, - 0x00000000, 0x10040040, - 0x10000040, 0x10001000, - 0x00041040, 0x00040000, - 0x00041040, 0x00040000, - 0x10041000, 0x00001000, - 0x00000040, 0x10040040, - 0x00001000, 0x00041040, - 0x10001000, 0x00000040, - 0x10000040, 0x10040000, - 0x10040040, 0x10000000, - 0x00040000, 0x10001040, - 0x00000000, 0x10041040, - 0x00040040, 0x10000040, - 0x10040000, 0x10001000, - 0x10001040, 0x00000000, - 0x10041040, 0x00041000, - 0x00041000, 0x00001040, - 0x00001040, 0x00040040, - 0x10000000, 0x10041000 }; - + private static final int[] SP1 = new int[] { + 0x01010400, 0x00000000, 0x00010000, 0x01010404, 0x01010004, 0x00010404, + 0x00000004, 0x00010000, 0x00000400, 0x01010400, 0x01010404, 0x00000400, + 0x01000404, 0x01010004, 0x01000000, 0x00000004, 0x00000404, 0x01000400, + 0x01000400, 0x00010400, 0x00010400, 0x01010000, 0x01010000, 0x01000404, + 0x00010004, 0x01000004, 0x01000004, 0x00010004, 0x00000000, 0x00000404, + 0x00010404, 0x01000000, 0x00010000, 0x01010404, 0x00000004, 0x01010000, + 0x01010400, 0x01000000, 0x01000000, 0x00000400, 0x01010004, 0x00010000, + 0x00010400, 0x01000004, 0x00000400, 0x00000004, 0x01000404, 0x00010404, + 0x01010404, 0x00010004, 0x01010000, 0x01000404, 0x01000004, 0x00000404, + 0x00010404, 0x01010400, 0x00000404, 0x01000400, 0x01000400, 0x00000000, + 0x00010004, 0x00010400, 0x00000000, 0x01010004 }; + private static final int[] SP2 = new int[] { + 0x80108020, 0x80008000, 0x00008000, 0x00108020, 0x00100000, 0x00000020, + 0x80100020, 0x80008020, 0x80000020, 0x80108020, 0x80108000, 0x80000000, + 0x80008000, 0x00100000, 0x00000020, 0x80100020, 0x00108000, 0x00100020, + 0x80008020, 0x00000000, 0x80000000, 0x00008000, 0x00108020, 0x80100000, + 0x00100020, 0x80000020, 0x00000000, 0x00108000, 0x00008020, 0x80108000, + 0x80100000, 0x00008020, 0x00000000, 0x00108020, 0x80100020, 0x00100000, + 0x80008020, 0x80100000, 0x80108000, 0x00008000, 0x80100000, 0x80008000, + 0x00000020, 0x80108020, 0x00108020, 0x00000020, 0x00008000, 0x80000000, + 0x00008020, 0x80108000, 0x00100000, 0x80000020, 0x00100020, 0x80008020, + 0x80000020, 0x00100020, 0x00108000, 0x00000000, 0x80008000, 0x00008020, + 0x80000000, 0x80100020, 0x80108020, 0x00108000 }; + private static final int[] SP3 = new int[] { + 0x00000208, 0x08020200, 0x00000000, 0x08020008, 0x08000200, 0x00000000, + 0x00020208, 0x08000200, 0x00020008, 0x08000008, 0x08000008, 0x00020000, + 0x08020208, 0x00020008, 0x08020000, 0x00000208, 0x08000000, 0x00000008, + 0x08020200, 0x00000200, 0x00020200, 0x08020000, 0x08020008, 0x00020208, + 0x08000208, 0x00020200, 0x00020000, 0x08000208, 0x00000008, 0x08020208, + 0x00000200, 0x08000000, 0x08020200, 0x08000000, 0x00020008, 0x00000208, + 0x00020000, 0x08020200, 0x08000200, 0x00000000, 0x00000200, 0x00020008, + 0x08020208, 0x08000200, 0x08000008, 0x00000200, 0x00000000, 0x08020008, + 0x08000208, 0x00020000, 0x08000000, 0x08020208, 0x00000008, 0x00020208, + 0x00020200, 0x08000008, 0x08020000, 0x08000208, 0x00000208, 0x08020000, + 0x00020208, 0x00000008, 0x08020008, 0x00020200 }; + private static final int[] SP4 = new int[] { + 0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802080, 0x00800081, + 0x00800001, 0x00002001, 0x00000000, 0x00802000, 0x00802000, 0x00802081, + 0x00000081, 0x00000000, 0x00800080, 0x00800001, 0x00000001, 0x00002000, + 0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002001, 0x00002080, + 0x00800081, 0x00000001, 0x00002080, 0x00800080, 0x00002000, 0x00802080, + 0x00802081, 0x00000081, 0x00800080, 0x00800001, 0x00802000, 0x00802081, + 0x00000081, 0x00000000, 0x00000000, 0x00802000, 0x00002080, 0x00800080, + 0x00800081, 0x00000001, 0x00802001, 0x00002081, 0x00002081, 0x00000080, + 0x00802081, 0x00000081, 0x00000001, 0x00002000, 0x00800001, 0x00002001, + 0x00802080, 0x00800081, 0x00002001, 0x00002080, 0x00800000, 0x00802001, + 0x00000080, 0x00800000, 0x00002000, 0x00802080 }; + private static final int[] SP5 = new int[] { + 0x00000100, 0x02080100, 0x02080000, 0x42000100, 0x00080000, 0x00000100, + 0x40000000, 0x02080000, 0x40080100, 0x00080000, 0x02000100, 0x40080100, + 0x42000100, 0x42080000, 0x00080100, 0x40000000, 0x02000000, 0x40080000, + 0x40080000, 0x00000000, 0x40000100, 0x42080100, 0x42080100, 0x02000100, + 0x42080000, 0x40000100, 0x00000000, 0x42000000, 0x02080100, 0x02000000, + 0x42000000, 0x00080100, 0x00080000, 0x42000100, 0x00000100, 0x02000000, + 0x40000000, 0x02080000, 0x42000100, 0x40080100, 0x02000100, 0x40000000, + 0x42080000, 0x02080100, 0x40080100, 0x00000100, 0x02000000, 0x42080000, + 0x42080100, 0x00080100, 0x42000000, 0x42080100, 0x02080000, 0x00000000, + 0x40080000, 0x42000000, 0x00080100, 0x02000100, 0x40000100, 0x00080000, + 0x00000000, 0x40080000, 0x02080100, 0x40000100 }; + private static final int[] SP6 = new int[] { + 0x20000010, 0x20400000, 0x00004000, 0x20404010, 0x20400000, 0x00000010, + 0x20404010, 0x00400000, 0x20004000, 0x00404010, 0x00400000, 0x20000010, + 0x00400010, 0x20004000, 0x20000000, 0x00004010, 0x00000000, 0x00400010, + 0x20004010, 0x00004000, 0x00404000, 0x20004010, 0x00000010, 0x20400010, + 0x20400010, 0x00000000, 0x00404010, 0x20404000, 0x00004010, 0x00404000, + 0x20404000, 0x20000000, 0x20004000, 0x00000010, 0x20400010, 0x00404000, + 0x20404010, 0x00400000, 0x00004010, 0x20000010, 0x00400000, 0x20004000, + 0x20000000, 0x00004010, 0x20000010, 0x20404010, 0x00404000, 0x20400000, + 0x00404010, 0x20404000, 0x00000000, 0x20400010, 0x00000010, 0x00004000, + 0x20400000, 0x00404010, 0x00004000, 0x00400010, 0x20004010, 0x00000000, + 0x20404000, 0x20000000, 0x00400010, 0x20004010 }; + private static final int[] SP7 = new int[] { + 0x00200000, 0x04200002, 0x04000802, 0x00000000, 0x00000800, 0x04000802, + 0x00200802, 0x04200800, 0x04200802, 0x00200000, 0x00000000, 0x04000002, + 0x00000002, 0x04000000, 0x04200002, 0x00000802, 0x04000800, 0x00200802, + 0x00200002, 0x04000800, 0x04000002, 0x04200000, 0x04200800, 0x00200002, + 0x04200000, 0x00000800, 0x00000802, 0x04200802, 0x00200800, 0x00000002, + 0x04000000, 0x00200800, 0x04000000, 0x00200800, 0x00200000, 0x04000802, + 0x04000802, 0x04200002, 0x04200002, 0x00000002, 0x00200002, 0x04000000, + 0x04000800, 0x00200000, 0x04200800, 0x00000802, 0x00200802, 0x04200800, + 0x00000802, 0x04000002, 0x04200802, 0x04200000, 0x00200800, 0x00000000, + 0x00000002, 0x04200802, 0x00000000, 0x00200802, 0x04200000, 0x00000800, + 0x04000002, 0x04000800, 0x00000800, 0x00200002 }; + private static final int[] SP8 = new int[] { + 0x10001040, 0x00001000, 0x00040000, 0x10041040, 0x10000000, 0x10001040, + 0x00000040, 0x10000000, 0x00040040, 0x10040000, 0x10041040, 0x00041000, + 0x10041000, 0x00041040, 0x00001000, 0x00000040, 0x10040000, 0x10000040, + 0x10001000, 0x00001040, 0x00041000, 0x00040040, 0x10040040, 0x10041000, + 0x00001040, 0x00000000, 0x00000000, 0x10040040, 0x10000040, 0x10001000, + 0x00041040, 0x00040000, 0x00041040, 0x00040000, 0x10041000, 0x00001000, + 0x00000040, 0x10040040, 0x00001000, 0x00041040, 0x10001000, 0x00000040, + 0x10000040, 0x10040000, 0x10040040, 0x10000000, 0x00040000, 0x10001040, + 0x00000000, 0x10041040, 0x00040040, 0x10000040, 0x10040000, 0x10001000, + 0x10001040, 0x00000000, 0x10041040, 0x00041000, 0x00041000, 0x00001040, + 0x00001040, 0x00040040, 0x10000000, 0x10041000 }; /** * Constants that help in determining whether or not a byte array is parity * adjusted. */ - private static final byte[] PARITY = { 8, 1, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, - 0, 2, 8, 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, - 0, 8, 0, 8, 8, 3, 0, 8, 8, 0, 8, 0, 0, - 8, 8, 0, 0, 8, 0, 8, 8, 0, 8, 0, 0, 8, - 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, 0, - 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, - 8, 0, 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, - 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, - 0, 8, 8, 0, 8, 0, 0, 8, 0, 8, 8, 0, 8, - 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, - 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, - 0, 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, - 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, 0, - 8, 8, 0, 8, 0, 0, 8, 0, 8, 8, 0, 8, 0, - 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, 8, 0, 0, - 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, - 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, - 8, 8, 0, 4, 8, 8, 0, 8, 0, 0, 8, 8, 0, - 0, 8, 0, 8, 8, 0, 8, 5, 0, 8, 0, 8, 8, - 0, 0, 8, 8, 0, 8, 0, 6, 8 }; - + private static final byte[] PARITY = { + 8, 1, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 2, 8, + 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 3, + 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, + 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, + 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, + 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, + 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, + 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, + 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, + 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, + 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, + 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, + 8, 0, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 0, 8, + 0, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, + 4, 8, 8, 0, 8, 0, 0, 8, 8, 0, 0, 8, 0, 8, 8, 0, + 8, 5, 0, 8, 0, 8, 8, 0, 0, 8, 8, 0, 8, 0, 6, 8 }; // Key schedule constants. - - private static final byte[] ROTARS = { 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, - 21, 23, 25, 27, 28 }; - - private static final byte[] PC1 = { 56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, - 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, - 10, 2, 59, 51, 43, 35, 62, 54, 46, 38, 30, - 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, - 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, - 3 }; - - private static final byte[] PC2 = { 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, - 9, 22, 18, 11, 3, 25, 7, 15, 6, 26, 19, - 12, 1, 40, 51, 30, 36, 46, 54, 29, 39, 50, - 44, 32, 47, 43, 48, 38, 55, 33, 52, 45, - 41, 49, 35, 28, 31 }; - + private static final byte[] ROTARS = { + 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 }; + private static final byte[] PC1 = { + 56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, 9, 1, + 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, 62, 54, 46, 38, + 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 60, 52, 44, 36, + 28, 20, 12, 4, 27, 19, 11, 3 }; + private static final byte[] PC2 = { + 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, 22, 18, 11, 3, + 25, 7, 15, 6, 26, 19, 12, 1, 40, 51, 30, 36, 46, 54, 29, 39, + 50, 44, 32, 47, 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 }; /** * Weak keys (parity adjusted): If all the bits in each half are either 0 * or 1, then the key used for any cycle of the algorithm is the same as * all other cycles. */ public static final byte[][] WEAK_KEYS = { - Util.toBytesFromString("0101010101010101"), - Util.toBytesFromString("01010101FEFEFEFE"), - Util.toBytesFromString("FEFEFEFE01010101"), - Util.toBytesFromString("FEFEFEFEFEFEFEFE") }; - + Util.toBytesFromString("0101010101010101"), + Util.toBytesFromString("01010101FEFEFEFE"), + Util.toBytesFromString("FEFEFEFE01010101"), + Util.toBytesFromString("FEFEFEFEFEFEFEFE") }; /** * Semi-weak keys (parity adjusted): Some pairs of keys encrypt plain text * to identical cipher text. In other words, one key in the pair can decrypt @@ -403,73 +219,69 @@ public class DES extends BaseCipher * generated, these semi-weak keys produce only two different sub-keys. */ public static final byte[][] SEMIWEAK_KEYS = { - Util.toBytesFromString("01FE01FE01FE01FE"), - Util.toBytesFromString("FE01FE01FE01FE01"), - Util.toBytesFromString("1FE01FE00EF10EF1"), - Util.toBytesFromString("E01FE01FF10EF10E"), - Util.toBytesFromString("01E001E001F101F1"), - Util.toBytesFromString("E001E001F101F101"), - Util.toBytesFromString("1FFE1FFE0EFE0EFE"), - Util.toBytesFromString("FE1FFE1FFE0EFE0E"), - Util.toBytesFromString("011F011F010E010E"), - Util.toBytesFromString("1F011F010E010E01"), - Util.toBytesFromString("E0FEE0FEF1FEF1FE"), - Util.toBytesFromString("FEE0FEE0FEF1FEF1") }; - + Util.toBytesFromString("01FE01FE01FE01FE"), + Util.toBytesFromString("FE01FE01FE01FE01"), + Util.toBytesFromString("1FE01FE00EF10EF1"), + Util.toBytesFromString("E01FE01FF10EF10E"), + Util.toBytesFromString("01E001E001F101F1"), + Util.toBytesFromString("E001E001F101F101"), + Util.toBytesFromString("1FFE1FFE0EFE0EFE"), + Util.toBytesFromString("FE1FFE1FFE0EFE0E"), + Util.toBytesFromString("011F011F010E010E"), + Util.toBytesFromString("1F011F010E010E01"), + Util.toBytesFromString("E0FEE0FEF1FEF1FE"), + Util.toBytesFromString("FEE0FEE0FEF1FEF1") }; /** Possible weak keys (parity adjusted) --produce 4 instead of 16 subkeys. */ public static final byte[][] POSSIBLE_WEAK_KEYS = { - Util.toBytesFromString("1F1F01010E0E0101"), - Util.toBytesFromString("011F1F01010E0E01"), - Util.toBytesFromString("1F01011F0E01010E"), - Util.toBytesFromString("01011F1F01010E0E"), - Util.toBytesFromString("E0E00101F1F10101"), - Util.toBytesFromString("FEFE0101FEFE0101"), - Util.toBytesFromString("FEE01F01FEF10E01"), - Util.toBytesFromString("E0FE1F01F1FE0E01"), - Util.toBytesFromString("FEE0011FFEF1010E"), - Util.toBytesFromString("E0FE011FF1FE010E"), - Util.toBytesFromString("E0E01F1FF1F10E0E"), - Util.toBytesFromString("FEFE1F1FFEFE0E0E"), - Util.toBytesFromString("1F1F01010E0E0101"), - Util.toBytesFromString("011F1F01010E0E01"), - Util.toBytesFromString("1F01011F0E01010E"), - Util.toBytesFromString("01011F1F01010E0E"), - Util.toBytesFromString("01E0E00101F1F101"), - Util.toBytesFromString("1FFEE0010EFEF001"), - Util.toBytesFromString("1FE0FE010EF1FE01"), - Util.toBytesFromString("01FEFE0101FEFE01"), - Util.toBytesFromString("1FE0E01F0EF1F10E"), - Util.toBytesFromString("01FEE01F01FEF10E"), - Util.toBytesFromString("01E0FE1F01F1FE0E"), - Util.toBytesFromString("1FFEFE1F0EFEFE0E"), - - Util.toBytesFromString("E00101E0F10101F1"), - Util.toBytesFromString("FE1F01E0FE0E0EF1"), - Util.toBytesFromString("FE011FE0FE010EF1"), - Util.toBytesFromString("E01F1FE0F10E0EF1"), - Util.toBytesFromString("FE0101FEFE0101FE"), - Util.toBytesFromString("E01F01FEF10E01FE"), - Util.toBytesFromString("E0011FFEF1010EFE"), - Util.toBytesFromString("FE1F1FFEFE0E0EFE"), - Util.toBytesFromString("1FFE01E00EFE01F1"), - Util.toBytesFromString("01FE1FE001FE0EF1"), - Util.toBytesFromString("1FE001FE0EF101FE"), - Util.toBytesFromString("01E01FFE01F10EFE"), - Util.toBytesFromString("0101E0E00101F1F1"), - Util.toBytesFromString("1F1FE0E00E0EF1F1"), - Util.toBytesFromString("1F01FEE00E01FEF1"), - Util.toBytesFromString("011FFEE0010EFEF1"), - Util.toBytesFromString("1F01E0FE0E01F1FE"), - Util.toBytesFromString("011FE0FE010EF1FE"), - Util.toBytesFromString("0101FEFE0001FEFE"), - Util.toBytesFromString("1F1FFEFE0E0EFEFE"), - Util.toBytesFromString("FEFEE0E0FEFEF1F1"), - Util.toBytesFromString("E0FEFEE0F1FEFEF1"), - Util.toBytesFromString("FEE0E0FEFEF1F1FE"), - Util.toBytesFromString("E0E0FEFEF1F1FEFE") }; - - // Constructor(s) - // ------------------------------------------------------------------------- + Util.toBytesFromString("1F1F01010E0E0101"), + Util.toBytesFromString("011F1F01010E0E01"), + Util.toBytesFromString("1F01011F0E01010E"), + Util.toBytesFromString("01011F1F01010E0E"), + Util.toBytesFromString("E0E00101F1F10101"), + Util.toBytesFromString("FEFE0101FEFE0101"), + Util.toBytesFromString("FEE01F01FEF10E01"), + Util.toBytesFromString("E0FE1F01F1FE0E01"), + Util.toBytesFromString("FEE0011FFEF1010E"), + Util.toBytesFromString("E0FE011FF1FE010E"), + Util.toBytesFromString("E0E01F1FF1F10E0E"), + Util.toBytesFromString("FEFE1F1FFEFE0E0E"), + Util.toBytesFromString("1F1F01010E0E0101"), + Util.toBytesFromString("011F1F01010E0E01"), + Util.toBytesFromString("1F01011F0E01010E"), + Util.toBytesFromString("01011F1F01010E0E"), + Util.toBytesFromString("01E0E00101F1F101"), + Util.toBytesFromString("1FFEE0010EFEF001"), + Util.toBytesFromString("1FE0FE010EF1FE01"), + Util.toBytesFromString("01FEFE0101FEFE01"), + Util.toBytesFromString("1FE0E01F0EF1F10E"), + Util.toBytesFromString("01FEE01F01FEF10E"), + Util.toBytesFromString("01E0FE1F01F1FE0E"), + Util.toBytesFromString("1FFEFE1F0EFEFE0E"), + + Util.toBytesFromString("E00101E0F10101F1"), + Util.toBytesFromString("FE1F01E0FE0E0EF1"), + Util.toBytesFromString("FE011FE0FE010EF1"), + Util.toBytesFromString("E01F1FE0F10E0EF1"), + Util.toBytesFromString("FE0101FEFE0101FE"), + Util.toBytesFromString("E01F01FEF10E01FE"), + Util.toBytesFromString("E0011FFEF1010EFE"), + Util.toBytesFromString("FE1F1FFEFE0E0EFE"), + Util.toBytesFromString("1FFE01E00EFE01F1"), + Util.toBytesFromString("01FE1FE001FE0EF1"), + Util.toBytesFromString("1FE001FE0EF101FE"), + Util.toBytesFromString("01E01FFE01F10EFE"), + Util.toBytesFromString("0101E0E00101F1F1"), + Util.toBytesFromString("1F1FE0E00E0EF1F1"), + Util.toBytesFromString("1F01FEE00E01FEF1"), + Util.toBytesFromString("011FFEE0010EFEF1"), + Util.toBytesFromString("1F01E0FE0E01F1FE"), + Util.toBytesFromString("011FE0FE010EF1FE"), + Util.toBytesFromString("0101FEFE0001FEFE"), + Util.toBytesFromString("1F1FFEFE0E0EFEFE"), + Util.toBytesFromString("FEFEE0E0FEFEF1F1"), + Util.toBytesFromString("E0FEFEE0F1FEFEF1"), + Util.toBytesFromString("FEE0E0FEFEF1F1FE"), + Util.toBytesFromString("E0E0FEFEF1F1FEFE") }; /** Default 0-argument constructor. */ public DES() @@ -477,28 +289,23 @@ public class DES extends BaseCipher super(Registry.DES_CIPHER, BLOCK_SIZE, KEY_SIZE); } - // Class methods - // ------------------------------------------------------------------------- - /** - * <p>Adjust the parity for a raw key array. This essentially means that each + * Adjust the parity for a raw key array. This essentially means that each * byte in the array will have an odd number of '1' bits (the last bit in - * each byte is unused.</p> + * each byte is unused. * * @param kb The key array, to be parity-adjusted. * @param offset The starting index into the key bytes. */ public static void adjustParity(byte[] kb, int offset) { - for (int i = offset; i < KEY_SIZE; i++) - { - kb[i] ^= (PARITY[kb[i] & 0xff] == 8) ? 1 : 0; - } + for (int i = offset; i < offset + KEY_SIZE; i++) + kb[i] ^= (PARITY[kb[i] & 0xff] == 8) ? 1 : 0; } /** - * <p>Test if a byte array, which must be at least 8 bytes long, is parity - * adjusted.</p> + * Test if a byte array, which must be at least 8 bytes long, is parity + * adjusted. * * @param kb The key bytes. * @param offset The starting index into the key bytes. @@ -527,59 +334,35 @@ public class DES extends BaseCipher } /** - * <p>Test if a key is a weak key.</p> + * Test if a key is a weak key. * * @param kb The key to test. * @return <code>true</code> if the key is weak. */ public static boolean isWeak(byte[] kb) { - // return Arrays.equals(kb, WEAK_KEYS[0]) || Arrays.equals(kb, WEAK_KEYS[1]) - // || Arrays.equals(kb, WEAK_KEYS[2]) || Arrays.equals(kb, WEAK_KEYS[3]) - // || Arrays.equals(kb, WEAK_KEYS[4]) || Arrays.equals(kb, WEAK_KEYS[5]) - // || Arrays.equals(kb, WEAK_KEYS[6]) || Arrays.equals(kb, WEAK_KEYS[7]); for (int i = 0; i < WEAK_KEYS.length; i++) - { - if (Arrays.equals(WEAK_KEYS[i], kb)) - { - return true; - } - } + if (Arrays.equals(WEAK_KEYS[i], kb)) + return true; return false; } /** - * <p>Test if a key is a semi-weak key.</p> + * Test if a key is a semi-weak key. * * @param kb The key to test. * @return <code>true</code> if this key is semi-weak. */ public static boolean isSemiWeak(byte[] kb) { - // return Arrays.equals(kb, SEMIWEAK_KEYS[0]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[1]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[2]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[3]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[4]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[5]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[6]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[7]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[8]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[9]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[10]) - // || Arrays.equals(kb, SEMIWEAK_KEYS[11]); for (int i = 0; i < SEMIWEAK_KEYS.length; i++) - { - if (Arrays.equals(SEMIWEAK_KEYS[i], kb)) - { - return true; - } - } + if (Arrays.equals(SEMIWEAK_KEYS[i], kb)) + return true; return false; } /** - * <p>Test if the designated byte array represents a possibly weak key.</p> + * Test if the designated byte array represents a possibly weak key. * * @param kb the byte array to test. * @return <code>true</code> if <code>kb</code>represents a possibly weak key. @@ -588,18 +371,14 @@ public class DES extends BaseCipher public static boolean isPossibleWeak(byte[] kb) { for (int i = 0; i < POSSIBLE_WEAK_KEYS.length; i++) - { - if (Arrays.equals(POSSIBLE_WEAK_KEYS[i], kb)) - { - return true; - } - } + if (Arrays.equals(POSSIBLE_WEAK_KEYS[i], kb)) + return true; return false; } /** - * <p>The core DES function. This is used for both encryption and decryption, - * the only difference being the key.</p> + * The core DES function. This is used for both encryption and decryption, + * the only difference being the key. * * @param in The input bytes. * @param i The starting offset into the input bytes. @@ -610,13 +389,15 @@ public class DES extends BaseCipher private static void desFunc(byte[] in, int i, byte[] out, int o, int[] key) { int right, left, work; - // Load. - left = (in[i++] & 0xff) << 24 | (in[i++] & 0xff) << 16 - | (in[i++] & 0xff) << 8 | in[i++] & 0xff; - right = (in[i++] & 0xff) << 24 | (in[i++] & 0xff) << 16 - | (in[i++] & 0xff) << 8 | in[i] & 0xff; - + left = (in[i++] & 0xff) << 24 + | (in[i++] & 0xff) << 16 + | (in[i++] & 0xff) << 8 + | in[i++] & 0xff; + right = (in[i++] & 0xff) << 24 + | (in[i++] & 0xff) << 16 + | (in[i++] & 0xff) << 8 + | in[i ] & 0xff; // Initial permutation. work = ((left >>> 4) ^ right) & 0x0F0F0F0F; left ^= work << 4; @@ -681,7 +462,6 @@ public class DES extends BaseCipher t |= SP2[work & 0x3F]; right ^= t; } - // The final permutation. right = (right << 31) | (right >>> 1); work = (left ^ right) & 0xAAAAAAAA; @@ -705,19 +485,16 @@ public class DES extends BaseCipher right ^= work << 4; left ^= work; - out[o++] = (byte) (right >>> 24); - out[o++] = (byte) (right >>> 16); - out[o++] = (byte) (right >>> 8); + out[o++] = (byte)(right >>> 24); + out[o++] = (byte)(right >>> 16); + out[o++] = (byte)(right >>> 8); out[o++] = (byte) right; - out[o++] = (byte) (left >>> 24); - out[o++] = (byte) (left >>> 16); - out[o++] = (byte) (left >>> 8); - out[o] = (byte) left; + out[o++] = (byte)(left >>> 24); + out[o++] = (byte)(left >>> 16); + out[o++] = (byte)(left >>> 8); + out[o ] = (byte) left; } - // Instance methods implementing BaseCipher - // ------------------------------------------------------------------------- - public Object clone() { return new DES(); @@ -725,12 +502,12 @@ public class DES extends BaseCipher public Iterator blockSizes() { - return Collections.singleton(new Integer(BLOCK_SIZE)).iterator(); + return Collections.singleton(Integer.valueOf(BLOCK_SIZE)).iterator(); } public Iterator keySizes() { - return Collections.singleton(new Integer(KEY_SIZE)).iterator(); + return Collections.singleton(Integer.valueOf(KEY_SIZE)).iterator(); } public Object makeKey(byte[] kb, int bs) throws InvalidKeyException @@ -740,9 +517,7 @@ public class DES extends BaseCipher if (Properties.checkForWeakKeys() && (isWeak(kb) || isSemiWeak(kb) || isPossibleWeak(kb))) - { - throw new WeakKeyException(); - } + throw new WeakKeyException(); int i, j, l, m, n; long pc1m = 0, pcr = 0; @@ -751,11 +526,9 @@ public class DES extends BaseCipher { l = PC1[i]; pc1m |= ((kb[l >>> 3] & (0x80 >>> (l & 7))) != 0) ? (1L << (55 - i)) - : 0; + : 0; } - Context ctx = new Context(); - // Encryption key first. for (i = 0; i < 16; i++) { @@ -769,7 +542,7 @@ public class DES extends BaseCipher pcr |= ((pc1m & 1L << (55 - l)) != 0) ? (1L << (55 - j)) : 0; else pcr |= ((pc1m & 1L << (55 - (l - 28))) != 0) ? (1L << (55 - j)) - : 0; + : 0; } for (j = 28; j < 56; j++) { @@ -778,7 +551,7 @@ public class DES extends BaseCipher pcr |= ((pc1m & 1L << (55 - l)) != 0) ? (1L << (55 - j)) : 0; else pcr |= ((pc1m & 1L << (55 - (l - 28))) != 0) ? (1L << (55 - j)) - : 0; + : 0; } for (j = 0; j < 24; j++) { @@ -788,36 +561,37 @@ public class DES extends BaseCipher ctx.ek[n] |= 1 << (23 - j); } } - // The decryption key is the same, but in reversed order. for (i = 0; i < Context.EXPANDED_KEY_SIZE; i += 2) { ctx.dk[30 - i] = ctx.ek[i]; ctx.dk[31 - i] = ctx.ek[i + 1]; } - // "Cook" the keys. for (i = 0; i < 32; i += 2) { int x, y; - x = ctx.ek[i]; y = ctx.ek[i + 1]; - - ctx.ek[i] = ((x & 0x00FC0000) << 6) | ((x & 0x00000FC0) << 10) - | ((y & 0x00FC0000) >>> 10) | ((y & 0x00000FC0) >>> 6); - ctx.ek[i + 1] = ((x & 0x0003F000) << 12) | ((x & 0x0000003F) << 16) - | ((y & 0x0003F000) >>> 4) | (y & 0x0000003F); - + ctx.ek[i ] = ((x & 0x00FC0000) << 6) + | ((x & 0x00000FC0) << 10) + | ((y & 0x00FC0000) >>> 10) + | ((y & 0x00000FC0) >>> 6); + ctx.ek[i + 1] = ((x & 0x0003F000) << 12) + | ((x & 0x0000003F) << 16) + | ((y & 0x0003F000) >>> 4) + | (y & 0x0000003F); x = ctx.dk[i]; y = ctx.dk[i + 1]; - - ctx.dk[i] = ((x & 0x00FC0000) << 6) | ((x & 0x00000FC0) << 10) - | ((y & 0x00FC0000) >>> 10) | ((y & 0x00000FC0) >>> 6); - ctx.dk[i + 1] = ((x & 0x0003F000) << 12) | ((x & 0x0000003F) << 16) - | ((y & 0x0003F000) >>> 4) | (y & 0x0000003F); + ctx.dk[i ] = ((x & 0x00FC0000) << 6) + | ((x & 0x00000FC0) << 10) + | ((y & 0x00FC0000) >>> 10) + | ((y & 0x00000FC0) >>> 6); + ctx.dk[i + 1] = ((x & 0x0003F000) << 12) + | ((x & 0x0000003F) << 16) + | ((y & 0x0003F000) >>> 4) + | (y & 0x0000003F); } - return ctx; } @@ -831,19 +605,12 @@ public class DES extends BaseCipher desFunc(in, i, out, o, ((Context) K).dk); } - // Inner classe(s) - // ========================================================================= - /** * Simple wrapper class around the session keys. Package-private so TripleDES * can see it. */ final class Context { - - // Constants and variables - // ---------------------------------------------------------------------- - private static final int EXPANDED_KEY_SIZE = 32; /** The encryption key. */ @@ -852,9 +619,6 @@ public class DES extends BaseCipher /** The decryption key. */ int[] dk; - // Constructor(s) - // ---------------------------------------------------------------------- - /** Default 0-arguments constructor. */ Context() { @@ -862,12 +626,6 @@ public class DES extends BaseCipher dk = new int[EXPANDED_KEY_SIZE]; } - // Class methods - // ---------------------------------------------------------------------- - - // Instance methods - // ---------------------------------------------------------------------- - byte[] getEncryptionKeyBytes() { return toByteArray(ek); @@ -883,12 +641,12 @@ public class DES extends BaseCipher byte[] result = new byte[4 * k.length]; for (int i = 0, j = 0; i < k.length; i++) { - result[j++] = (byte) (k[i] >>> 24); - result[j++] = (byte) (k[i] >>> 16); - result[j++] = (byte) (k[i] >>> 8); + result[j++] = (byte)(k[i] >>> 24); + result[j++] = (byte)(k[i] >>> 16); + result[j++] = (byte)(k[i] >>> 8); result[j++] = (byte) k[i]; } return result; } } -}
\ No newline at end of file +} |