Mercurial > 510Connectbot
annotate app/src/main/java/ch/ethz/ssh2/crypto/cipher/DES.java @ 493:0a17c6e7cb0f stable-1.9.4-3
improve Makefile
author | Carl Byington <carl@five-ten-sg.com> |
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date | Tue, 15 Feb 2022 14:07:00 -0800 |
parents | d29cce60f393 |
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rev | line source |
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1 package ch.ethz.ssh2.crypto.cipher; |
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2 |
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3 /* |
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4 This file is based on the 3DES implementation from the Bouncy Castle Crypto package. |
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5 Their licence file states the following: |
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6 |
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7 Copyright (c) 2000 - 2004 The Legion Of The Bouncy Castle |
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8 (http://www.bouncycastle.org) |
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9 |
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10 Permission is hereby granted, free of charge, to any person obtaining a copy |
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11 of this software and associated documentation files (the "Software"), to deal |
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12 in the Software without restriction, including without limitation the rights |
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13 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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14 copies of the Software, and to permit persons to whom the Software is |
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15 furnished to do so, subject to the following conditions: |
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16 |
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17 The above copyright notice and this permission notice shall be included in |
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18 all copies or substantial portions of the Software. |
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19 |
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20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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21 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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22 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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23 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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24 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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25 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
307 | 26 THE SOFTWARE. |
273
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27 */ |
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28 |
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29 /** |
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30 * DES. |
307 | 31 * |
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32 * @author See comments in the source file |
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33 * @version 2.50, 03/15/10 |
307 | 34 * |
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35 */ |
307 | 36 public class DES implements BlockCipher { |
37 private int[] workingKey = null; | |
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38 |
307 | 39 /** |
40 * standard constructor. | |
41 */ | |
42 public DES() { | |
43 } | |
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44 |
307 | 45 /** |
46 * initialise a DES cipher. | |
47 * | |
48 * @param encrypting | |
49 * whether or not we are for encryption. | |
50 * @param key | |
51 * the parameters required to set up the cipher. | |
52 * @exception IllegalArgumentException | |
53 * if the params argument is inappropriate. | |
54 */ | |
55 public void init(boolean encrypting, byte[] key) { | |
56 this.workingKey = generateWorkingKey(encrypting, key, 0); | |
57 } | |
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58 |
307 | 59 public String getAlgorithmName() { |
60 return "DES"; | |
61 } | |
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62 |
307 | 63 public int getBlockSize() { |
64 return 8; | |
65 } | |
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66 |
307 | 67 public void transformBlock(byte[] in, int inOff, byte[] out, int outOff) { |
68 if (workingKey == null) { | |
69 throw new IllegalStateException("DES engine not initialised!"); | |
70 } | |
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71 |
307 | 72 desFunc(workingKey, in, inOff, out, outOff); |
73 } | |
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74 |
307 | 75 public void reset() { |
76 } | |
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77 |
307 | 78 /** |
79 * what follows is mainly taken from "Applied Cryptography", by Bruce | |
80 * Schneier, however it also bears great resemblance to Richard | |
81 * Outerbridge's D3DES... | |
82 */ | |
83 | |
84 static short[] Df_Key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, | |
85 0x10, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67 | |
86 }; | |
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87 |
307 | 88 static short[] bytebit = { 0200, 0100, 040, 020, 010, 04, 02, 01 }; |
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89 |
307 | 90 static int[] bigbyte = { 0x800000, 0x400000, 0x200000, 0x100000, 0x80000, 0x40000, 0x20000, 0x10000, 0x8000, |
91 0x4000, 0x2000, 0x1000, 0x800, 0x400, 0x200, 0x100, 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1 | |
92 }; | |
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93 |
307 | 94 /* |
95 * Use the key schedule specified in the Standard (ANSI X3.92-1981). | |
96 */ | |
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97 |
307 | 98 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, |
99 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, | |
100 4, 27, 19, 11, 3 | |
101 }; | |
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102 |
307 | 103 static byte[] totrot = { 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 }; |
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104 |
307 | 105 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, |
106 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47, 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 | |
107 }; | |
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108 |
307 | 109 static int[] SP1 = { 0x01010400, 0x00000000, 0x00010000, 0x01010404, 0x01010004, 0x00010404, 0x00000004, |
110 0x00010000, 0x00000400, 0x01010400, 0x01010404, 0x00000400, 0x01000404, 0x01010004, 0x01000000, 0x00000004, | |
111 0x00000404, 0x01000400, 0x01000400, 0x00010400, 0x00010400, 0x01010000, 0x01010000, 0x01000404, 0x00010004, | |
112 0x01000004, 0x01000004, 0x00010004, 0x00000000, 0x00000404, 0x00010404, 0x01000000, 0x00010000, 0x01010404, | |
113 0x00000004, 0x01010000, 0x01010400, 0x01000000, 0x01000000, 0x00000400, 0x01010004, 0x00010000, 0x00010400, | |
114 0x01000004, 0x00000400, 0x00000004, 0x01000404, 0x00010404, 0x01010404, 0x00010004, 0x01010000, 0x01000404, | |
115 0x01000004, 0x00000404, 0x00010404, 0x01010400, 0x00000404, 0x01000400, 0x01000400, 0x00000000, 0x00010004, | |
116 0x00010400, 0x00000000, 0x01010004 | |
117 }; | |
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118 |
307 | 119 static int[] SP2 = { 0x80108020, 0x80008000, 0x00008000, 0x00108020, 0x00100000, 0x00000020, 0x80100020, |
120 0x80008020, 0x80000020, 0x80108020, 0x80108000, 0x80000000, 0x80008000, 0x00100000, 0x00000020, 0x80100020, | |
121 0x00108000, 0x00100020, 0x80008020, 0x00000000, 0x80000000, 0x00008000, 0x00108020, 0x80100000, 0x00100020, | |
122 0x80000020, 0x00000000, 0x00108000, 0x00008020, 0x80108000, 0x80100000, 0x00008020, 0x00000000, 0x00108020, | |
123 0x80100020, 0x00100000, 0x80008020, 0x80100000, 0x80108000, 0x00008000, 0x80100000, 0x80008000, 0x00000020, | |
124 0x80108020, 0x00108020, 0x00000020, 0x00008000, 0x80000000, 0x00008020, 0x80108000, 0x00100000, 0x80000020, | |
125 0x00100020, 0x80008020, 0x80000020, 0x00100020, 0x00108000, 0x00000000, 0x80008000, 0x00008020, 0x80000000, | |
126 0x80100020, 0x80108020, 0x00108000 | |
127 }; | |
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128 |
307 | 129 static int[] SP3 = { 0x00000208, 0x08020200, 0x00000000, 0x08020008, 0x08000200, 0x00000000, 0x00020208, |
130 0x08000200, 0x00020008, 0x08000008, 0x08000008, 0x00020000, 0x08020208, 0x00020008, 0x08020000, 0x00000208, | |
131 0x08000000, 0x00000008, 0x08020200, 0x00000200, 0x00020200, 0x08020000, 0x08020008, 0x00020208, 0x08000208, | |
132 0x00020200, 0x00020000, 0x08000208, 0x00000008, 0x08020208, 0x00000200, 0x08000000, 0x08020200, 0x08000000, | |
133 0x00020008, 0x00000208, 0x00020000, 0x08020200, 0x08000200, 0x00000000, 0x00000200, 0x00020008, 0x08020208, | |
134 0x08000200, 0x08000008, 0x00000200, 0x00000000, 0x08020008, 0x08000208, 0x00020000, 0x08000000, 0x08020208, | |
135 0x00000008, 0x00020208, 0x00020200, 0x08000008, 0x08020000, 0x08000208, 0x00000208, 0x08020000, 0x00020208, | |
136 0x00000008, 0x08020008, 0x00020200 | |
137 }; | |
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138 |
307 | 139 static int[] SP4 = { 0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802080, 0x00800081, 0x00800001, |
140 0x00002001, 0x00000000, 0x00802000, 0x00802000, 0x00802081, 0x00000081, 0x00000000, 0x00800080, 0x00800001, | |
141 0x00000001, 0x00002000, 0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002001, 0x00002080, 0x00800081, | |
142 0x00000001, 0x00002080, 0x00800080, 0x00002000, 0x00802080, 0x00802081, 0x00000081, 0x00800080, 0x00800001, | |
143 0x00802000, 0x00802081, 0x00000081, 0x00000000, 0x00000000, 0x00802000, 0x00002080, 0x00800080, 0x00800081, | |
144 0x00000001, 0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802081, 0x00000081, 0x00000001, 0x00002000, | |
145 0x00800001, 0x00002001, 0x00802080, 0x00800081, 0x00002001, 0x00002080, 0x00800000, 0x00802001, 0x00000080, | |
146 0x00800000, 0x00002000, 0x00802080 | |
147 }; | |
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148 |
307 | 149 static int[] SP5 = { 0x00000100, 0x02080100, 0x02080000, 0x42000100, 0x00080000, 0x00000100, 0x40000000, |
150 0x02080000, 0x40080100, 0x00080000, 0x02000100, 0x40080100, 0x42000100, 0x42080000, 0x00080100, 0x40000000, | |
151 0x02000000, 0x40080000, 0x40080000, 0x00000000, 0x40000100, 0x42080100, 0x42080100, 0x02000100, 0x42080000, | |
152 0x40000100, 0x00000000, 0x42000000, 0x02080100, 0x02000000, 0x42000000, 0x00080100, 0x00080000, 0x42000100, | |
153 0x00000100, 0x02000000, 0x40000000, 0x02080000, 0x42000100, 0x40080100, 0x02000100, 0x40000000, 0x42080000, | |
154 0x02080100, 0x40080100, 0x00000100, 0x02000000, 0x42080000, 0x42080100, 0x00080100, 0x42000000, 0x42080100, | |
155 0x02080000, 0x00000000, 0x40080000, 0x42000000, 0x00080100, 0x02000100, 0x40000100, 0x00080000, 0x00000000, | |
156 0x40080000, 0x02080100, 0x40000100 | |
157 }; | |
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158 |
307 | 159 static int[] SP6 = { 0x20000010, 0x20400000, 0x00004000, 0x20404010, 0x20400000, 0x00000010, 0x20404010, |
160 0x00400000, 0x20004000, 0x00404010, 0x00400000, 0x20000010, 0x00400010, 0x20004000, 0x20000000, 0x00004010, | |
161 0x00000000, 0x00400010, 0x20004010, 0x00004000, 0x00404000, 0x20004010, 0x00000010, 0x20400010, 0x20400010, | |
162 0x00000000, 0x00404010, 0x20404000, 0x00004010, 0x00404000, 0x20404000, 0x20000000, 0x20004000, 0x00000010, | |
163 0x20400010, 0x00404000, 0x20404010, 0x00400000, 0x00004010, 0x20000010, 0x00400000, 0x20004000, 0x20000000, | |
164 0x00004010, 0x20000010, 0x20404010, 0x00404000, 0x20400000, 0x00404010, 0x20404000, 0x00000000, 0x20400010, | |
165 0x00000010, 0x00004000, 0x20400000, 0x00404010, 0x00004000, 0x00400010, 0x20004010, 0x00000000, 0x20404000, | |
166 0x20000000, 0x00400010, 0x20004010 | |
167 }; | |
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168 |
307 | 169 static int[] SP7 = { 0x00200000, 0x04200002, 0x04000802, 0x00000000, 0x00000800, 0x04000802, 0x00200802, |
170 0x04200800, 0x04200802, 0x00200000, 0x00000000, 0x04000002, 0x00000002, 0x04000000, 0x04200002, 0x00000802, | |
171 0x04000800, 0x00200802, 0x00200002, 0x04000800, 0x04000002, 0x04200000, 0x04200800, 0x00200002, 0x04200000, | |
172 0x00000800, 0x00000802, 0x04200802, 0x00200800, 0x00000002, 0x04000000, 0x00200800, 0x04000000, 0x00200800, | |
173 0x00200000, 0x04000802, 0x04000802, 0x04200002, 0x04200002, 0x00000002, 0x00200002, 0x04000000, 0x04000800, | |
174 0x00200000, 0x04200800, 0x00000802, 0x00200802, 0x04200800, 0x00000802, 0x04000002, 0x04200802, 0x04200000, | |
175 0x00200800, 0x00000000, 0x00000002, 0x04200802, 0x00000000, 0x00200802, 0x04200000, 0x00000800, 0x04000002, | |
176 0x04000800, 0x00000800, 0x00200002 | |
177 }; | |
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178 |
307 | 179 static int[] SP8 = { 0x10001040, 0x00001000, 0x00040000, 0x10041040, 0x10000000, 0x10001040, 0x00000040, |
180 0x10000000, 0x00040040, 0x10040000, 0x10041040, 0x00041000, 0x10041000, 0x00041040, 0x00001000, 0x00000040, | |
181 0x10040000, 0x10000040, 0x10001000, 0x00001040, 0x00041000, 0x00040040, 0x10040040, 0x10041000, 0x00001040, | |
182 0x00000000, 0x00000000, 0x10040040, 0x10000040, 0x10001000, 0x00041040, 0x00040000, 0x00041040, 0x00040000, | |
183 0x10041000, 0x00001000, 0x00000040, 0x10040040, 0x00001000, 0x00041040, 0x10001000, 0x00000040, 0x10000040, | |
184 0x10040000, 0x10040040, 0x10000000, 0x00040000, 0x10001040, 0x00000000, 0x10041040, 0x00040040, 0x10000040, | |
185 0x10040000, 0x10001000, 0x10001040, 0x00000000, 0x10041040, 0x00041000, 0x00041000, 0x00001040, 0x00001040, | |
186 0x00040040, 0x10000000, 0x10041000 | |
187 }; | |
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188 |
307 | 189 /** |
190 * generate an integer based working key based on our secret key and what we | |
191 * processing we are planning to do. | |
192 * | |
193 * Acknowledgements for this routine go to James Gillogly & Phil Karn. | |
194 * (whoever, and wherever they are!). | |
195 */ | |
196 protected int[] generateWorkingKey(boolean encrypting, byte[] key, int off) { | |
197 int[] newKey = new int[32]; | |
198 boolean[] pc1m = new boolean[56], pcr = new boolean[56]; | |
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199 |
307 | 200 for (int j = 0; j < 56; j++) { |
201 int l = pc1[j]; | |
202 pc1m[j] = ((key[off + (l >>> 3)] & bytebit[l & 07]) != 0); | |
203 } | |
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204 |
307 | 205 for (int i = 0; i < 16; i++) { |
206 int l, m, n; | |
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207 |
307 | 208 if (encrypting) { |
209 m = i << 1; | |
210 } | |
211 else { | |
212 m = (15 - i) << 1; | |
213 } | |
214 | |
215 n = m + 1; | |
216 newKey[m] = newKey[n] = 0; | |
217 | |
218 for (int j = 0; j < 28; j++) { | |
219 l = j + totrot[i]; | |
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220 |
307 | 221 if (l < 28) { |
222 pcr[j] = pc1m[l]; | |
223 } | |
224 else { | |
225 pcr[j] = pc1m[l - 28]; | |
226 } | |
227 } | |
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228 |
307 | 229 for (int j = 28; j < 56; j++) { |
230 l = j + totrot[i]; | |
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231 |
307 | 232 if (l < 56) { |
233 pcr[j] = pc1m[l]; | |
234 } | |
235 else { | |
236 pcr[j] = pc1m[l - 28]; | |
237 } | |
238 } | |
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239 |
307 | 240 for (int j = 0; j < 24; j++) { |
241 if (pcr[pc2[j]]) { | |
242 newKey[m] |= bigbyte[j]; | |
243 } | |
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244 |
307 | 245 if (pcr[pc2[j + 24]]) { |
246 newKey[n] |= bigbyte[j]; | |
247 } | |
248 } | |
249 } | |
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250 |
307 | 251 // |
252 // store the processed key | |
253 // | |
254 for (int i = 0; i != 32; i += 2) { | |
255 int i1, i2; | |
256 i1 = newKey[i]; | |
257 i2 = newKey[i + 1]; | |
258 newKey[i] = ((i1 & 0x00fc0000) << 6) | ((i1 & 0x00000fc0) << 10) | ((i2 & 0x00fc0000) >>> 10) | |
259 | ((i2 & 0x00000fc0) >>> 6); | |
260 newKey[i + 1] = ((i1 & 0x0003f000) << 12) | ((i1 & 0x0000003f) << 16) | ((i2 & 0x0003f000) >>> 4) | |
261 | (i2 & 0x0000003f); | |
262 } | |
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263 |
307 | 264 return newKey; |
265 } | |
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266 |
307 | 267 /** |
268 * the DES engine. | |
269 */ | |
270 protected void desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff) { | |
271 int work, right, left; | |
272 left = (in[inOff + 0] & 0xff) << 24; | |
273 left |= (in[inOff + 1] & 0xff) << 16; | |
274 left |= (in[inOff + 2] & 0xff) << 8; | |
275 left |= (in[inOff + 3] & 0xff); | |
276 right = (in[inOff + 4] & 0xff) << 24; | |
277 right |= (in[inOff + 5] & 0xff) << 16; | |
278 right |= (in[inOff + 6] & 0xff) << 8; | |
279 right |= (in[inOff + 7] & 0xff); | |
280 work = ((left >>> 4) ^ right) & 0x0f0f0f0f; | |
281 right ^= work; | |
282 left ^= (work << 4); | |
283 work = ((left >>> 16) ^ right) & 0x0000ffff; | |
284 right ^= work; | |
285 left ^= (work << 16); | |
286 work = ((right >>> 2) ^ left) & 0x33333333; | |
287 left ^= work; | |
288 right ^= (work << 2); | |
289 work = ((right >>> 8) ^ left) & 0x00ff00ff; | |
290 left ^= work; | |
291 right ^= (work << 8); | |
292 right = ((right << 1) | ((right >>> 31) & 1)) & 0xffffffff; | |
293 work = (left ^ right) & 0xaaaaaaaa; | |
294 left ^= work; | |
295 right ^= work; | |
296 left = ((left << 1) | ((left >>> 31) & 1)) & 0xffffffff; | |
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297 |
307 | 298 for (int round = 0; round < 8; round++) { |
299 int fval; | |
300 work = (right << 28) | (right >>> 4); | |
301 work ^= wKey[round * 4 + 0]; | |
302 fval = SP7[work & 0x3f]; | |
303 fval |= SP5[(work >>> 8) & 0x3f]; | |
304 fval |= SP3[(work >>> 16) & 0x3f]; | |
305 fval |= SP1[(work >>> 24) & 0x3f]; | |
306 work = right ^ wKey[round * 4 + 1]; | |
307 fval |= SP8[work & 0x3f]; | |
308 fval |= SP6[(work >>> 8) & 0x3f]; | |
309 fval |= SP4[(work >>> 16) & 0x3f]; | |
310 fval |= SP2[(work >>> 24) & 0x3f]; | |
311 left ^= fval; | |
312 work = (left << 28) | (left >>> 4); | |
313 work ^= wKey[round * 4 + 2]; | |
314 fval = SP7[work & 0x3f]; | |
315 fval |= SP5[(work >>> 8) & 0x3f]; | |
316 fval |= SP3[(work >>> 16) & 0x3f]; | |
317 fval |= SP1[(work >>> 24) & 0x3f]; | |
318 work = left ^ wKey[round * 4 + 3]; | |
319 fval |= SP8[work & 0x3f]; | |
320 fval |= SP6[(work >>> 8) & 0x3f]; | |
321 fval |= SP4[(work >>> 16) & 0x3f]; | |
322 fval |= SP2[(work >>> 24) & 0x3f]; | |
323 right ^= fval; | |
324 } | |
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325 |
307 | 326 right = (right << 31) | (right >>> 1); |
327 work = (left ^ right) & 0xaaaaaaaa; | |
328 left ^= work; | |
329 right ^= work; | |
330 left = (left << 31) | (left >>> 1); | |
331 work = ((left >>> 8) ^ right) & 0x00ff00ff; | |
332 right ^= work; | |
333 left ^= (work << 8); | |
334 work = ((left >>> 2) ^ right) & 0x33333333; | |
335 right ^= work; | |
336 left ^= (work << 2); | |
337 work = ((right >>> 16) ^ left) & 0x0000ffff; | |
338 left ^= work; | |
339 right ^= (work << 16); | |
340 work = ((right >>> 4) ^ left) & 0x0f0f0f0f; | |
341 left ^= work; | |
342 right ^= (work << 4); | |
343 out[outOff + 0] = (byte)((right >>> 24) & 0xff); | |
344 out[outOff + 1] = (byte)((right >>> 16) & 0xff); | |
345 out[outOff + 2] = (byte)((right >>> 8) & 0xff); | |
346 out[outOff + 3] = (byte)(right & 0xff); | |
347 out[outOff + 4] = (byte)((left >>> 24) & 0xff); | |
348 out[outOff + 5] = (byte)((left >>> 16) & 0xff); | |
349 out[outOff + 6] = (byte)((left >>> 8) & 0xff); | |
350 out[outOff + 7] = (byte)(left & 0xff); | |
351 } | |
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352 } |