| |
| package com.trilead.ssh2.crypto.cipher; |
| |
| /* |
| This file is based on the 3DES implementation from the Bouncy Castle Crypto package. |
| Their licence file states the following: |
| |
| Copyright (c) 2000 - 2004 The Legion Of The Bouncy Castle |
| (http://www.bouncycastle.org) |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), to deal |
| in the Software without restriction, including without limitation the rights |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| copies of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included in |
| all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| THE SOFTWARE. |
| */ |
| |
| /** |
| * DES. |
| * |
| * @author See comments in the source file |
| * @version $Id: DES.java,v 1.1 2007/10/15 12:49:55 cplattne Exp $ |
| * |
| */ |
| public class DES implements BlockCipher |
| { |
| private int[] workingKey = null; |
| |
| /** |
| * standard constructor. |
| */ |
| public DES() |
| { |
| } |
| |
| /** |
| * initialise a DES cipher. |
| * |
| * @param encrypting |
| * whether or not we are for encryption. |
| * @param key |
| * the parameters required to set up the cipher. |
| * @exception IllegalArgumentException |
| * if the params argument is inappropriate. |
| */ |
| public void init(boolean encrypting, byte[] key) |
| { |
| this.workingKey = generateWorkingKey(encrypting, key, 0); |
| } |
| |
| public String getAlgorithmName() |
| { |
| return "DES"; |
| } |
| |
| public int getBlockSize() |
| { |
| return 8; |
| } |
| |
| public void transformBlock(byte[] in, int inOff, byte[] out, int outOff) |
| { |
| if (workingKey == null) |
| { |
| throw new IllegalStateException("DES engine not initialised!"); |
| } |
| |
| desFunc(workingKey, in, inOff, out, outOff); |
| } |
| |
| public void reset() |
| { |
| } |
| |
| /** |
| * what follows is mainly taken from "Applied Cryptography", by Bruce |
| * Schneier, however it also bears great resemblance to Richard |
| * Outerbridge's D3DES... |
| */ |
| |
| static short[] Df_Key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, |
| 0x10, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67 }; |
| |
| static short[] bytebit = { 0200, 0100, 040, 020, 010, 04, 02, 01 }; |
| |
| static int[] bigbyte = { 0x800000, 0x400000, 0x200000, 0x100000, 0x80000, 0x40000, 0x20000, 0x10000, 0x8000, |
| 0x4000, 0x2000, 0x1000, 0x800, 0x400, 0x200, 0x100, 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1 }; |
| |
| /* |
| * Use the key schedule specified in the Standard (ANSI X3.92-1981). |
| */ |
| |
| static 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 }; |
| |
| static byte[] totrot = { 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 }; |
| |
| static 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 }; |
| |
| static int[] SP1 = { 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 }; |
| |
| static int[] SP2 = { 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 }; |
| |
| static int[] SP3 = { 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 }; |
| |
| static int[] SP4 = { 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 }; |
| |
| static int[] SP5 = { 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 }; |
| |
| static int[] SP6 = { 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 }; |
| |
| static int[] SP7 = { 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 }; |
| |
| static int[] SP8 = { 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 }; |
| |
| /** |
| * generate an integer based working key based on our secret key and what we |
| * processing we are planning to do. |
| * |
| * Acknowledgements for this routine go to James Gillogly & Phil Karn. |
| * (whoever, and wherever they are!). |
| */ |
| protected int[] generateWorkingKey(boolean encrypting, byte[] key, int off) |
| { |
| int[] newKey = new int[32]; |
| boolean[] pc1m = new boolean[56], pcr = new boolean[56]; |
| |
| for (int j = 0; j < 56; j++) |
| { |
| int l = pc1[j]; |
| |
| pc1m[j] = ((key[off + (l >>> 3)] & bytebit[l & 07]) != 0); |
| } |
| |
| for (int i = 0; i < 16; i++) |
| { |
| int l, m, n; |
| |
| if (encrypting) |
| { |
| m = i << 1; |
| } |
| else |
| { |
| m = (15 - i) << 1; |
| } |
| |
| n = m + 1; |
| newKey[m] = newKey[n] = 0; |
| |
| for (int j = 0; j < 28; j++) |
| { |
| l = j + totrot[i]; |
| if (l < 28) |
| { |
| pcr[j] = pc1m[l]; |
| } |
| else |
| { |
| pcr[j] = pc1m[l - 28]; |
| } |
| } |
| |
| for (int j = 28; j < 56; j++) |
| { |
| l = j + totrot[i]; |
| if (l < 56) |
| { |
| pcr[j] = pc1m[l]; |
| } |
| else |
| { |
| pcr[j] = pc1m[l - 28]; |
| } |
| } |
| |
| for (int j = 0; j < 24; j++) |
| { |
| if (pcr[pc2[j]]) |
| { |
| newKey[m] |= bigbyte[j]; |
| } |
| |
| if (pcr[pc2[j + 24]]) |
| { |
| newKey[n] |= bigbyte[j]; |
| } |
| } |
| } |
| |
| // |
| // store the processed key |
| // |
| for (int i = 0; i != 32; i += 2) |
| { |
| int i1, i2; |
| |
| i1 = newKey[i]; |
| i2 = newKey[i + 1]; |
| |
| newKey[i] = ((i1 & 0x00fc0000) << 6) | ((i1 & 0x00000fc0) << 10) | ((i2 & 0x00fc0000) >>> 10) |
| | ((i2 & 0x00000fc0) >>> 6); |
| |
| newKey[i + 1] = ((i1 & 0x0003f000) << 12) | ((i1 & 0x0000003f) << 16) | ((i2 & 0x0003f000) >>> 4) |
| | (i2 & 0x0000003f); |
| } |
| |
| return newKey; |
| } |
| |
| /** |
| * the DES engine. |
| */ |
| protected void desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff) |
| { |
| int work, right, left; |
| |
| left = (in[inOff + 0] & 0xff) << 24; |
| left |= (in[inOff + 1] & 0xff) << 16; |
| left |= (in[inOff + 2] & 0xff) << 8; |
| left |= (in[inOff + 3] & 0xff); |
| |
| right = (in[inOff + 4] & 0xff) << 24; |
| right |= (in[inOff + 5] & 0xff) << 16; |
| right |= (in[inOff + 6] & 0xff) << 8; |
| right |= (in[inOff + 7] & 0xff); |
| |
| work = ((left >>> 4) ^ right) & 0x0f0f0f0f; |
| right ^= work; |
| left ^= (work << 4); |
| work = ((left >>> 16) ^ right) & 0x0000ffff; |
| right ^= work; |
| left ^= (work << 16); |
| work = ((right >>> 2) ^ left) & 0x33333333; |
| left ^= work; |
| right ^= (work << 2); |
| work = ((right >>> 8) ^ left) & 0x00ff00ff; |
| left ^= work; |
| right ^= (work << 8); |
| right = ((right << 1) | ((right >>> 31) & 1)) & 0xffffffff; |
| work = (left ^ right) & 0xaaaaaaaa; |
| left ^= work; |
| right ^= work; |
| left = ((left << 1) | ((left >>> 31) & 1)) & 0xffffffff; |
| |
| for (int round = 0; round < 8; round++) |
| { |
| int fval; |
| |
| work = (right << 28) | (right >>> 4); |
| work ^= wKey[round * 4 + 0]; |
| fval = SP7[work & 0x3f]; |
| fval |= SP5[(work >>> 8) & 0x3f]; |
| fval |= SP3[(work >>> 16) & 0x3f]; |
| fval |= SP1[(work >>> 24) & 0x3f]; |
| work = right ^ wKey[round * 4 + 1]; |
| fval |= SP8[work & 0x3f]; |
| fval |= SP6[(work >>> 8) & 0x3f]; |
| fval |= SP4[(work >>> 16) & 0x3f]; |
| fval |= SP2[(work >>> 24) & 0x3f]; |
| left ^= fval; |
| work = (left << 28) | (left >>> 4); |
| work ^= wKey[round * 4 + 2]; |
| fval = SP7[work & 0x3f]; |
| fval |= SP5[(work >>> 8) & 0x3f]; |
| fval |= SP3[(work >>> 16) & 0x3f]; |
| fval |= SP1[(work >>> 24) & 0x3f]; |
| work = left ^ wKey[round * 4 + 3]; |
| fval |= SP8[work & 0x3f]; |
| fval |= SP6[(work >>> 8) & 0x3f]; |
| fval |= SP4[(work >>> 16) & 0x3f]; |
| fval |= SP2[(work >>> 24) & 0x3f]; |
| right ^= fval; |
| } |
| |
| right = (right << 31) | (right >>> 1); |
| work = (left ^ right) & 0xaaaaaaaa; |
| left ^= work; |
| right ^= work; |
| left = (left << 31) | (left >>> 1); |
| work = ((left >>> 8) ^ right) & 0x00ff00ff; |
| right ^= work; |
| left ^= (work << 8); |
| work = ((left >>> 2) ^ right) & 0x33333333; |
| right ^= work; |
| left ^= (work << 2); |
| work = ((right >>> 16) ^ left) & 0x0000ffff; |
| left ^= work; |
| right ^= (work << 16); |
| work = ((right >>> 4) ^ left) & 0x0f0f0f0f; |
| left ^= work; |
| right ^= (work << 4); |
| |
| out[outOff + 0] = (byte) ((right >>> 24) & 0xff); |
| out[outOff + 1] = (byte) ((right >>> 16) & 0xff); |
| out[outOff + 2] = (byte) ((right >>> 8) & 0xff); |
| out[outOff + 3] = (byte) (right & 0xff); |
| out[outOff + 4] = (byte) ((left >>> 24) & 0xff); |
| out[outOff + 5] = (byte) ((left >>> 16) & 0xff); |
| out[outOff + 6] = (byte) ((left >>> 8) & 0xff); |
| out[outOff + 7] = (byte) (left & 0xff); |
| } |
| } |