f38a1528 |
1 | /* |
2 | * FIPS-46-3 compliant Triple-DES implementation |
3 | * |
4 | * Copyright (C) 2006-2014, Brainspark B.V. |
5 | * |
6 | * This file is part of PolarSSL (http://www.polarssl.org) |
7 | * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> |
8 | * |
9 | * All rights reserved. |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by |
13 | * the Free Software Foundation; either version 2 of the License, or |
14 | * (at your option) any later version. |
15 | * |
16 | * This program is distributed in the hope that it will be useful, |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
19 | * GNU General Public License for more details. |
20 | * |
21 | * You should have received a copy of the GNU General Public License along |
22 | * with this program; if not, write to the Free Software Foundation, Inc., |
23 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
24 | */ |
25 | /* |
26 | * DES, on which TDES is based, was originally designed by Horst Feistel |
27 | * at IBM in 1974, and was adopted as a standard by NIST (formerly NBS). |
28 | * |
29 | * http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf |
30 | */ |
31 | |
32 | //#include "polarssl/config.h" |
33 | #define POLARSSL_DES_C |
34 | |
35 | #if defined(POLARSSL_DES_C) |
36 | |
37 | #include "des.h" |
38 | |
39 | #if defined(POLARSSL_PLATFORM_C) |
40 | #include "polarssl/platform.h" |
41 | #else |
42 | #define polarssl_printf printf |
43 | #endif |
44 | |
45 | #if !defined(POLARSSL_DES_ALT) |
46 | |
47 | /* |
48 | * 32-bit integer manipulation macros (big endian) |
49 | */ |
50 | #ifndef GET_UINT32_BE |
51 | #define GET_UINT32_BE(n,b,i) \ |
52 | { \ |
53 | (n) = ( (uint32_t) (b)[(i) ] << 24 ) \ |
54 | | ( (uint32_t) (b)[(i) + 1] << 16 ) \ |
55 | | ( (uint32_t) (b)[(i) + 2] << 8 ) \ |
56 | | ( (uint32_t) (b)[(i) + 3] ); \ |
57 | } |
58 | #endif |
59 | |
60 | #ifndef PUT_UINT32_BE |
61 | #define PUT_UINT32_BE(n,b,i) \ |
62 | { \ |
63 | (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \ |
64 | (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \ |
65 | (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \ |
66 | (b)[(i) + 3] = (unsigned char) ( (n) ); \ |
67 | } |
68 | #endif |
69 | |
70 | /* |
71 | * Expanded DES S-boxes |
72 | */ |
73 | static const uint32_t SB1[64] = |
74 | { |
75 | 0x01010400, 0x00000000, 0x00010000, 0x01010404, |
76 | 0x01010004, 0x00010404, 0x00000004, 0x00010000, |
77 | 0x00000400, 0x01010400, 0x01010404, 0x00000400, |
78 | 0x01000404, 0x01010004, 0x01000000, 0x00000004, |
79 | 0x00000404, 0x01000400, 0x01000400, 0x00010400, |
80 | 0x00010400, 0x01010000, 0x01010000, 0x01000404, |
81 | 0x00010004, 0x01000004, 0x01000004, 0x00010004, |
82 | 0x00000000, 0x00000404, 0x00010404, 0x01000000, |
83 | 0x00010000, 0x01010404, 0x00000004, 0x01010000, |
84 | 0x01010400, 0x01000000, 0x01000000, 0x00000400, |
85 | 0x01010004, 0x00010000, 0x00010400, 0x01000004, |
86 | 0x00000400, 0x00000004, 0x01000404, 0x00010404, |
87 | 0x01010404, 0x00010004, 0x01010000, 0x01000404, |
88 | 0x01000004, 0x00000404, 0x00010404, 0x01010400, |
89 | 0x00000404, 0x01000400, 0x01000400, 0x00000000, |
90 | 0x00010004, 0x00010400, 0x00000000, 0x01010004 |
91 | }; |
92 | |
93 | static const uint32_t SB2[64] = |
94 | { |
95 | 0x80108020, 0x80008000, 0x00008000, 0x00108020, |
96 | 0x00100000, 0x00000020, 0x80100020, 0x80008020, |
97 | 0x80000020, 0x80108020, 0x80108000, 0x80000000, |
98 | 0x80008000, 0x00100000, 0x00000020, 0x80100020, |
99 | 0x00108000, 0x00100020, 0x80008020, 0x00000000, |
100 | 0x80000000, 0x00008000, 0x00108020, 0x80100000, |
101 | 0x00100020, 0x80000020, 0x00000000, 0x00108000, |
102 | 0x00008020, 0x80108000, 0x80100000, 0x00008020, |
103 | 0x00000000, 0x00108020, 0x80100020, 0x00100000, |
104 | 0x80008020, 0x80100000, 0x80108000, 0x00008000, |
105 | 0x80100000, 0x80008000, 0x00000020, 0x80108020, |
106 | 0x00108020, 0x00000020, 0x00008000, 0x80000000, |
107 | 0x00008020, 0x80108000, 0x00100000, 0x80000020, |
108 | 0x00100020, 0x80008020, 0x80000020, 0x00100020, |
109 | 0x00108000, 0x00000000, 0x80008000, 0x00008020, |
110 | 0x80000000, 0x80100020, 0x80108020, 0x00108000 |
111 | }; |
112 | |
113 | static const uint32_t SB3[64] = |
114 | { |
115 | 0x00000208, 0x08020200, 0x00000000, 0x08020008, |
116 | 0x08000200, 0x00000000, 0x00020208, 0x08000200, |
117 | 0x00020008, 0x08000008, 0x08000008, 0x00020000, |
118 | 0x08020208, 0x00020008, 0x08020000, 0x00000208, |
119 | 0x08000000, 0x00000008, 0x08020200, 0x00000200, |
120 | 0x00020200, 0x08020000, 0x08020008, 0x00020208, |
121 | 0x08000208, 0x00020200, 0x00020000, 0x08000208, |
122 | 0x00000008, 0x08020208, 0x00000200, 0x08000000, |
123 | 0x08020200, 0x08000000, 0x00020008, 0x00000208, |
124 | 0x00020000, 0x08020200, 0x08000200, 0x00000000, |
125 | 0x00000200, 0x00020008, 0x08020208, 0x08000200, |
126 | 0x08000008, 0x00000200, 0x00000000, 0x08020008, |
127 | 0x08000208, 0x00020000, 0x08000000, 0x08020208, |
128 | 0x00000008, 0x00020208, 0x00020200, 0x08000008, |
129 | 0x08020000, 0x08000208, 0x00000208, 0x08020000, |
130 | 0x00020208, 0x00000008, 0x08020008, 0x00020200 |
131 | }; |
132 | |
133 | static const uint32_t SB4[64] = |
134 | { |
135 | 0x00802001, 0x00002081, 0x00002081, 0x00000080, |
136 | 0x00802080, 0x00800081, 0x00800001, 0x00002001, |
137 | 0x00000000, 0x00802000, 0x00802000, 0x00802081, |
138 | 0x00000081, 0x00000000, 0x00800080, 0x00800001, |
139 | 0x00000001, 0x00002000, 0x00800000, 0x00802001, |
140 | 0x00000080, 0x00800000, 0x00002001, 0x00002080, |
141 | 0x00800081, 0x00000001, 0x00002080, 0x00800080, |
142 | 0x00002000, 0x00802080, 0x00802081, 0x00000081, |
143 | 0x00800080, 0x00800001, 0x00802000, 0x00802081, |
144 | 0x00000081, 0x00000000, 0x00000000, 0x00802000, |
145 | 0x00002080, 0x00800080, 0x00800081, 0x00000001, |
146 | 0x00802001, 0x00002081, 0x00002081, 0x00000080, |
147 | 0x00802081, 0x00000081, 0x00000001, 0x00002000, |
148 | 0x00800001, 0x00002001, 0x00802080, 0x00800081, |
149 | 0x00002001, 0x00002080, 0x00800000, 0x00802001, |
150 | 0x00000080, 0x00800000, 0x00002000, 0x00802080 |
151 | }; |
152 | |
153 | static const uint32_t SB5[64] = |
154 | { |
155 | 0x00000100, 0x02080100, 0x02080000, 0x42000100, |
156 | 0x00080000, 0x00000100, 0x40000000, 0x02080000, |
157 | 0x40080100, 0x00080000, 0x02000100, 0x40080100, |
158 | 0x42000100, 0x42080000, 0x00080100, 0x40000000, |
159 | 0x02000000, 0x40080000, 0x40080000, 0x00000000, |
160 | 0x40000100, 0x42080100, 0x42080100, 0x02000100, |
161 | 0x42080000, 0x40000100, 0x00000000, 0x42000000, |
162 | 0x02080100, 0x02000000, 0x42000000, 0x00080100, |
163 | 0x00080000, 0x42000100, 0x00000100, 0x02000000, |
164 | 0x40000000, 0x02080000, 0x42000100, 0x40080100, |
165 | 0x02000100, 0x40000000, 0x42080000, 0x02080100, |
166 | 0x40080100, 0x00000100, 0x02000000, 0x42080000, |
167 | 0x42080100, 0x00080100, 0x42000000, 0x42080100, |
168 | 0x02080000, 0x00000000, 0x40080000, 0x42000000, |
169 | 0x00080100, 0x02000100, 0x40000100, 0x00080000, |
170 | 0x00000000, 0x40080000, 0x02080100, 0x40000100 |
171 | }; |
172 | |
173 | static const uint32_t SB6[64] = |
174 | { |
175 | 0x20000010, 0x20400000, 0x00004000, 0x20404010, |
176 | 0x20400000, 0x00000010, 0x20404010, 0x00400000, |
177 | 0x20004000, 0x00404010, 0x00400000, 0x20000010, |
178 | 0x00400010, 0x20004000, 0x20000000, 0x00004010, |
179 | 0x00000000, 0x00400010, 0x20004010, 0x00004000, |
180 | 0x00404000, 0x20004010, 0x00000010, 0x20400010, |
181 | 0x20400010, 0x00000000, 0x00404010, 0x20404000, |
182 | 0x00004010, 0x00404000, 0x20404000, 0x20000000, |
183 | 0x20004000, 0x00000010, 0x20400010, 0x00404000, |
184 | 0x20404010, 0x00400000, 0x00004010, 0x20000010, |
185 | 0x00400000, 0x20004000, 0x20000000, 0x00004010, |
186 | 0x20000010, 0x20404010, 0x00404000, 0x20400000, |
187 | 0x00404010, 0x20404000, 0x00000000, 0x20400010, |
188 | 0x00000010, 0x00004000, 0x20400000, 0x00404010, |
189 | 0x00004000, 0x00400010, 0x20004010, 0x00000000, |
190 | 0x20404000, 0x20000000, 0x00400010, 0x20004010 |
191 | }; |
192 | |
193 | static const uint32_t SB7[64] = |
194 | { |
195 | 0x00200000, 0x04200002, 0x04000802, 0x00000000, |
196 | 0x00000800, 0x04000802, 0x00200802, 0x04200800, |
197 | 0x04200802, 0x00200000, 0x00000000, 0x04000002, |
198 | 0x00000002, 0x04000000, 0x04200002, 0x00000802, |
199 | 0x04000800, 0x00200802, 0x00200002, 0x04000800, |
200 | 0x04000002, 0x04200000, 0x04200800, 0x00200002, |
201 | 0x04200000, 0x00000800, 0x00000802, 0x04200802, |
202 | 0x00200800, 0x00000002, 0x04000000, 0x00200800, |
203 | 0x04000000, 0x00200800, 0x00200000, 0x04000802, |
204 | 0x04000802, 0x04200002, 0x04200002, 0x00000002, |
205 | 0x00200002, 0x04000000, 0x04000800, 0x00200000, |
206 | 0x04200800, 0x00000802, 0x00200802, 0x04200800, |
207 | 0x00000802, 0x04000002, 0x04200802, 0x04200000, |
208 | 0x00200800, 0x00000000, 0x00000002, 0x04200802, |
209 | 0x00000000, 0x00200802, 0x04200000, 0x00000800, |
210 | 0x04000002, 0x04000800, 0x00000800, 0x00200002 |
211 | }; |
212 | |
213 | static const uint32_t SB8[64] = |
214 | { |
215 | 0x10001040, 0x00001000, 0x00040000, 0x10041040, |
216 | 0x10000000, 0x10001040, 0x00000040, 0x10000000, |
217 | 0x00040040, 0x10040000, 0x10041040, 0x00041000, |
218 | 0x10041000, 0x00041040, 0x00001000, 0x00000040, |
219 | 0x10040000, 0x10000040, 0x10001000, 0x00001040, |
220 | 0x00041000, 0x00040040, 0x10040040, 0x10041000, |
221 | 0x00001040, 0x00000000, 0x00000000, 0x10040040, |
222 | 0x10000040, 0x10001000, 0x00041040, 0x00040000, |
223 | 0x00041040, 0x00040000, 0x10041000, 0x00001000, |
224 | 0x00000040, 0x10040040, 0x00001000, 0x00041040, |
225 | 0x10001000, 0x00000040, 0x10000040, 0x10040000, |
226 | 0x10040040, 0x10000000, 0x00040000, 0x10001040, |
227 | 0x00000000, 0x10041040, 0x00040040, 0x10000040, |
228 | 0x10040000, 0x10001000, 0x10001040, 0x00000000, |
229 | 0x10041040, 0x00041000, 0x00041000, 0x00001040, |
230 | 0x00001040, 0x00040040, 0x10000000, 0x10041000 |
231 | }; |
232 | |
233 | /* |
234 | * PC1: left and right halves bit-swap |
235 | */ |
236 | static const uint32_t LHs[16] = |
237 | { |
238 | 0x00000000, 0x00000001, 0x00000100, 0x00000101, |
239 | 0x00010000, 0x00010001, 0x00010100, 0x00010101, |
240 | 0x01000000, 0x01000001, 0x01000100, 0x01000101, |
241 | 0x01010000, 0x01010001, 0x01010100, 0x01010101 |
242 | }; |
243 | |
244 | static const uint32_t RHs[16] = |
245 | { |
246 | 0x00000000, 0x01000000, 0x00010000, 0x01010000, |
247 | 0x00000100, 0x01000100, 0x00010100, 0x01010100, |
248 | 0x00000001, 0x01000001, 0x00010001, 0x01010001, |
249 | 0x00000101, 0x01000101, 0x00010101, 0x01010101, |
250 | }; |
251 | |
252 | /* |
253 | * Initial Permutation macro |
254 | */ |
255 | #define DES_IP(X,Y) \ |
256 | { \ |
257 | T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4); \ |
258 | T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16); \ |
259 | T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2); \ |
260 | T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8); \ |
261 | Y = ((Y << 1) | (Y >> 31)) & 0xFFFFFFFF; \ |
262 | T = (X ^ Y) & 0xAAAAAAAA; Y ^= T; X ^= T; \ |
263 | X = ((X << 1) | (X >> 31)) & 0xFFFFFFFF; \ |
264 | } |
265 | |
266 | /* |
267 | * Final Permutation macro |
268 | */ |
269 | #define DES_FP(X,Y) \ |
270 | { \ |
271 | X = ((X << 31) | (X >> 1)) & 0xFFFFFFFF; \ |
272 | T = (X ^ Y) & 0xAAAAAAAA; X ^= T; Y ^= T; \ |
273 | Y = ((Y << 31) | (Y >> 1)) & 0xFFFFFFFF; \ |
274 | T = ((Y >> 8) ^ X) & 0x00FF00FF; X ^= T; Y ^= (T << 8); \ |
275 | T = ((Y >> 2) ^ X) & 0x33333333; X ^= T; Y ^= (T << 2); \ |
276 | T = ((X >> 16) ^ Y) & 0x0000FFFF; Y ^= T; X ^= (T << 16); \ |
277 | T = ((X >> 4) ^ Y) & 0x0F0F0F0F; Y ^= T; X ^= (T << 4); \ |
278 | } |
279 | |
280 | /* |
281 | * DES round macro |
282 | */ |
283 | #define DES_ROUND(X,Y) \ |
284 | { \ |
285 | T = *SK++ ^ X; \ |
286 | Y ^= SB8[ (T ) & 0x3F ] ^ \ |
287 | SB6[ (T >> 8) & 0x3F ] ^ \ |
288 | SB4[ (T >> 16) & 0x3F ] ^ \ |
289 | SB2[ (T >> 24) & 0x3F ]; \ |
290 | \ |
291 | T = *SK++ ^ ((X << 28) | (X >> 4)); \ |
292 | Y ^= SB7[ (T ) & 0x3F ] ^ \ |
293 | SB5[ (T >> 8) & 0x3F ] ^ \ |
294 | SB3[ (T >> 16) & 0x3F ] ^ \ |
295 | SB1[ (T >> 24) & 0x3F ]; \ |
296 | } |
297 | |
298 | #define SWAP(a,b) { uint32_t t = a; a = b; b = t; t = 0; } |
299 | |
300 | static const unsigned char odd_parity_table[128] = { 1, 2, 4, 7, 8, |
301 | 11, 13, 14, 16, 19, 21, 22, 25, 26, 28, 31, 32, 35, 37, 38, 41, 42, 44, |
302 | 47, 49, 50, 52, 55, 56, 59, 61, 62, 64, 67, 69, 70, 73, 74, 76, 79, 81, |
303 | 82, 84, 87, 88, 91, 93, 94, 97, 98, 100, 103, 104, 107, 109, 110, 112, |
304 | 115, 117, 118, 121, 122, 124, 127, 128, 131, 133, 134, 137, 138, 140, |
305 | 143, 145, 146, 148, 151, 152, 155, 157, 158, 161, 162, 164, 167, 168, |
306 | 171, 173, 174, 176, 179, 181, 182, 185, 186, 188, 191, 193, 194, 196, |
307 | 199, 200, 203, 205, 206, 208, 211, 213, 214, 217, 218, 220, 223, 224, |
308 | 227, 229, 230, 233, 234, 236, 239, 241, 242, 244, 247, 248, 251, 253, |
309 | 254 }; |
310 | |
311 | void des_key_set_parity( unsigned char key[DES_KEY_SIZE] ) |
312 | { |
313 | int i; |
314 | |
315 | for( i = 0; i < DES_KEY_SIZE; i++ ) |
316 | key[i] = odd_parity_table[key[i] / 2]; |
317 | } |
318 | |
319 | /* |
320 | * Check the given key's parity, returns 1 on failure, 0 on SUCCESS |
321 | */ |
322 | int des_key_check_key_parity( const unsigned char key[DES_KEY_SIZE] ) |
323 | { |
324 | int i; |
325 | |
326 | for( i = 0; i < DES_KEY_SIZE; i++ ) |
327 | if ( key[i] != odd_parity_table[key[i] / 2] ) |
328 | return( 1 ); |
329 | |
330 | return( 0 ); |
331 | } |
332 | |
333 | /* |
334 | * Table of weak and semi-weak keys |
335 | * |
336 | * Source: http://en.wikipedia.org/wiki/Weak_key |
337 | * |
338 | * Weak: |
339 | * Alternating ones + zeros (0x0101010101010101) |
340 | * Alternating 'F' + 'E' (0xFEFEFEFEFEFEFEFE) |
341 | * '0xE0E0E0E0F1F1F1F1' |
342 | * '0x1F1F1F1F0E0E0E0E' |
343 | * |
344 | * Semi-weak: |
345 | * 0x011F011F010E010E and 0x1F011F010E010E01 |
346 | * 0x01E001E001F101F1 and 0xE001E001F101F101 |
347 | * 0x01FE01FE01FE01FE and 0xFE01FE01FE01FE01 |
348 | * 0x1FE01FE00EF10EF1 and 0xE01FE01FF10EF10E |
349 | * 0x1FFE1FFE0EFE0EFE and 0xFE1FFE1FFE0EFE0E |
350 | * 0xE0FEE0FEF1FEF1FE and 0xFEE0FEE0FEF1FEF1 |
351 | * |
352 | */ |
353 | |
354 | #define WEAK_KEY_COUNT 16 |
355 | |
356 | static const unsigned char weak_key_table[WEAK_KEY_COUNT][DES_KEY_SIZE] = |
357 | { |
358 | { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }, |
359 | { 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE }, |
360 | { 0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E }, |
361 | { 0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1 }, |
362 | |
363 | { 0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E }, |
364 | { 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01 }, |
365 | { 0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1 }, |
366 | { 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01 }, |
367 | { 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE }, |
368 | { 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01 }, |
369 | { 0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1 }, |
370 | { 0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E }, |
371 | { 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE }, |
372 | { 0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E }, |
373 | { 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE }, |
374 | { 0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1 } |
375 | }; |
376 | |
377 | int des_key_check_weak( const unsigned char key[DES_KEY_SIZE] ) |
378 | { |
379 | int i; |
380 | |
381 | for( i = 0; i < WEAK_KEY_COUNT; i++ ) |
382 | if( memcmp( weak_key_table[i], key, DES_KEY_SIZE) == 0) |
383 | return( 1 ); |
384 | |
385 | return( 0 ); |
386 | } |
387 | |
388 | static void des_setkey( uint32_t SK[32], const unsigned char key[DES_KEY_SIZE] ) |
389 | { |
390 | int i; |
391 | uint32_t X, Y, T; |
392 | |
393 | GET_UINT32_BE( X, key, 0 ); |
394 | GET_UINT32_BE( Y, key, 4 ); |
395 | |
396 | /* |
397 | * Permuted Choice 1 |
398 | */ |
399 | T = ((Y >> 4) ^ X) & 0x0F0F0F0F; X ^= T; Y ^= (T << 4); |
400 | T = ((Y ) ^ X) & 0x10101010; X ^= T; Y ^= (T ); |
401 | |
402 | X = (LHs[ (X ) & 0xF] << 3) | (LHs[ (X >> 8) & 0xF ] << 2) |
403 | | (LHs[ (X >> 16) & 0xF] << 1) | (LHs[ (X >> 24) & 0xF ] ) |
404 | | (LHs[ (X >> 5) & 0xF] << 7) | (LHs[ (X >> 13) & 0xF ] << 6) |
405 | | (LHs[ (X >> 21) & 0xF] << 5) | (LHs[ (X >> 29) & 0xF ] << 4); |
406 | |
407 | Y = (RHs[ (Y >> 1) & 0xF] << 3) | (RHs[ (Y >> 9) & 0xF ] << 2) |
408 | | (RHs[ (Y >> 17) & 0xF] << 1) | (RHs[ (Y >> 25) & 0xF ] ) |
409 | | (RHs[ (Y >> 4) & 0xF] << 7) | (RHs[ (Y >> 12) & 0xF ] << 6) |
410 | | (RHs[ (Y >> 20) & 0xF] << 5) | (RHs[ (Y >> 28) & 0xF ] << 4); |
411 | |
412 | X &= 0x0FFFFFFF; |
413 | Y &= 0x0FFFFFFF; |
414 | |
415 | /* |
416 | * calculate subkeys |
417 | */ |
418 | for( i = 0; i < 16; i++ ) |
419 | { |
420 | if( i < 2 || i == 8 || i == 15 ) |
421 | { |
422 | X = ((X << 1) | (X >> 27)) & 0x0FFFFFFF; |
423 | Y = ((Y << 1) | (Y >> 27)) & 0x0FFFFFFF; |
424 | } |
425 | else |
426 | { |
427 | X = ((X << 2) | (X >> 26)) & 0x0FFFFFFF; |
428 | Y = ((Y << 2) | (Y >> 26)) & 0x0FFFFFFF; |
429 | } |
430 | |
431 | *SK++ = ((X << 4) & 0x24000000) | ((X << 28) & 0x10000000) |
432 | | ((X << 14) & 0x08000000) | ((X << 18) & 0x02080000) |
433 | | ((X << 6) & 0x01000000) | ((X << 9) & 0x00200000) |
434 | | ((X >> 1) & 0x00100000) | ((X << 10) & 0x00040000) |
435 | | ((X << 2) & 0x00020000) | ((X >> 10) & 0x00010000) |
436 | | ((Y >> 13) & 0x00002000) | ((Y >> 4) & 0x00001000) |
437 | | ((Y << 6) & 0x00000800) | ((Y >> 1) & 0x00000400) |
438 | | ((Y >> 14) & 0x00000200) | ((Y ) & 0x00000100) |
439 | | ((Y >> 5) & 0x00000020) | ((Y >> 10) & 0x00000010) |
440 | | ((Y >> 3) & 0x00000008) | ((Y >> 18) & 0x00000004) |
441 | | ((Y >> 26) & 0x00000002) | ((Y >> 24) & 0x00000001); |
442 | |
443 | *SK++ = ((X << 15) & 0x20000000) | ((X << 17) & 0x10000000) |
444 | | ((X << 10) & 0x08000000) | ((X << 22) & 0x04000000) |
445 | | ((X >> 2) & 0x02000000) | ((X << 1) & 0x01000000) |
446 | | ((X << 16) & 0x00200000) | ((X << 11) & 0x00100000) |
447 | | ((X << 3) & 0x00080000) | ((X >> 6) & 0x00040000) |
448 | | ((X << 15) & 0x00020000) | ((X >> 4) & 0x00010000) |
449 | | ((Y >> 2) & 0x00002000) | ((Y << 8) & 0x00001000) |
450 | | ((Y >> 14) & 0x00000808) | ((Y >> 9) & 0x00000400) |
451 | | ((Y ) & 0x00000200) | ((Y << 7) & 0x00000100) |
452 | | ((Y >> 7) & 0x00000020) | ((Y >> 3) & 0x00000011) |
453 | | ((Y << 2) & 0x00000004) | ((Y >> 21) & 0x00000002); |
454 | } |
455 | } |
456 | |
457 | /* |
458 | * DES key schedule (56-bit, encryption) |
459 | */ |
460 | int des_setkey_enc( des_context *ctx, const unsigned char key[DES_KEY_SIZE] ) |
461 | { |
462 | des_setkey( ctx->sk, key ); |
463 | |
464 | return( 0 ); |
465 | } |
466 | |
467 | /* |
468 | * DES key schedule (56-bit, decryption) |
469 | */ |
470 | int des_setkey_dec( des_context *ctx, const unsigned char key[DES_KEY_SIZE] ) |
471 | { |
472 | int i; |
473 | |
474 | des_setkey( ctx->sk, key ); |
475 | |
476 | for( i = 0; i < 16; i += 2 ) |
477 | { |
478 | SWAP( ctx->sk[i ], ctx->sk[30 - i] ); |
479 | SWAP( ctx->sk[i + 1], ctx->sk[31 - i] ); |
480 | } |
481 | |
482 | return( 0 ); |
483 | } |
484 | |
485 | static void des3_set2key( uint32_t esk[96], |
486 | uint32_t dsk[96], |
487 | const unsigned char key[DES_KEY_SIZE*2] ) |
488 | { |
489 | int i; |
490 | |
491 | des_setkey( esk, key ); |
492 | des_setkey( dsk + 32, key + 8 ); |
493 | |
494 | for( i = 0; i < 32; i += 2 ) |
495 | { |
496 | dsk[i ] = esk[30 - i]; |
497 | dsk[i + 1] = esk[31 - i]; |
498 | |
499 | esk[i + 32] = dsk[62 - i]; |
500 | esk[i + 33] = dsk[63 - i]; |
501 | |
502 | esk[i + 64] = esk[i ]; |
503 | esk[i + 65] = esk[i + 1]; |
504 | |
505 | dsk[i + 64] = dsk[i ]; |
506 | dsk[i + 65] = dsk[i + 1]; |
507 | } |
508 | } |
509 | |
510 | /* |
511 | * Triple-DES key schedule (112-bit, encryption) |
512 | */ |
513 | int des3_set2key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] ) |
514 | { |
515 | uint32_t sk[96]; |
516 | |
517 | des3_set2key( ctx->sk, sk, key ); |
518 | memset( sk, 0, sizeof( sk ) ); |
519 | |
520 | return( 0 ); |
521 | } |
522 | |
523 | /* |
524 | * Triple-DES key schedule (112-bit, decryption) |
525 | */ |
526 | int des3_set2key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 2] ) |
527 | { |
528 | uint32_t sk[96]; |
529 | |
530 | des3_set2key( sk, ctx->sk, key ); |
531 | memset( sk, 0, sizeof( sk ) ); |
532 | |
533 | return( 0 ); |
534 | } |
535 | |
536 | static void des3_set3key( uint32_t esk[96], |
537 | uint32_t dsk[96], |
538 | const unsigned char key[24] ) |
539 | { |
540 | int i; |
541 | |
542 | des_setkey( esk, key ); |
543 | des_setkey( dsk + 32, key + 8 ); |
544 | des_setkey( esk + 64, key + 16 ); |
545 | |
546 | for( i = 0; i < 32; i += 2 ) |
547 | { |
548 | dsk[i ] = esk[94 - i]; |
549 | dsk[i + 1] = esk[95 - i]; |
550 | |
551 | esk[i + 32] = dsk[62 - i]; |
552 | esk[i + 33] = dsk[63 - i]; |
553 | |
554 | dsk[i + 64] = esk[30 - i]; |
555 | dsk[i + 65] = esk[31 - i]; |
556 | } |
557 | } |
558 | |
559 | /* |
560 | * Triple-DES key schedule (168-bit, encryption) |
561 | */ |
562 | int des3_set3key_enc( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] ) |
563 | { |
564 | uint32_t sk[96]; |
565 | |
566 | des3_set3key( ctx->sk, sk, key ); |
567 | memset( sk, 0, sizeof( sk ) ); |
568 | |
569 | return( 0 ); |
570 | } |
571 | |
572 | /* |
573 | * Triple-DES key schedule (168-bit, decryption) |
574 | */ |
575 | int des3_set3key_dec( des3_context *ctx, const unsigned char key[DES_KEY_SIZE * 3] ) |
576 | { |
577 | uint32_t sk[96]; |
578 | |
579 | des3_set3key( sk, ctx->sk, key ); |
580 | memset( sk, 0, sizeof( sk ) ); |
581 | |
582 | return( 0 ); |
583 | } |
584 | |
585 | /* |
586 | * DES-ECB block encryption/decryption |
587 | */ |
588 | int des_crypt_ecb( des_context *ctx, |
589 | const unsigned char input[8], |
590 | unsigned char output[8] ) |
591 | { |
592 | int i; |
593 | uint32_t X, Y, T, *SK; |
594 | |
595 | SK = ctx->sk; |
596 | |
597 | GET_UINT32_BE( X, input, 0 ); |
598 | GET_UINT32_BE( Y, input, 4 ); |
599 | |
600 | DES_IP( X, Y ); |
601 | |
602 | for( i = 0; i < 8; i++ ) |
603 | { |
604 | DES_ROUND( Y, X ); |
605 | DES_ROUND( X, Y ); |
606 | } |
607 | |
608 | DES_FP( Y, X ); |
609 | |
610 | PUT_UINT32_BE( Y, output, 0 ); |
611 | PUT_UINT32_BE( X, output, 4 ); |
612 | |
613 | return( 0 ); |
614 | } |
615 | |
616 | #if defined(POLARSSL_CIPHER_MODE_CBC) |
617 | /* |
618 | * DES-CBC buffer encryption/decryption |
619 | */ |
620 | int des_crypt_cbc( des_context *ctx, |
621 | int mode, |
622 | size_t length, |
623 | unsigned char iv[8], |
624 | const unsigned char *input, |
625 | unsigned char *output ) |
626 | { |
627 | int i; |
628 | unsigned char temp[8]; |
629 | |
630 | if( length % 8 ) |
631 | return( POLARSSL_ERR_DES_INVALID_INPUT_LENGTH ); |
632 | |
633 | if( mode == DES_ENCRYPT ) |
634 | { |
635 | while( length > 0 ) |
636 | { |
637 | for( i = 0; i < 8; i++ ) |
638 | output[i] = (unsigned char)( input[i] ^ iv[i] ); |
639 | |
640 | des_crypt_ecb( ctx, output, output ); |
641 | memcpy( iv, output, 8 ); |
642 | |
643 | input += 8; |
644 | output += 8; |
645 | length -= 8; |
646 | } |
647 | } |
648 | else /* DES_DECRYPT */ |
649 | { |
650 | while( length > 0 ) |
651 | { |
652 | memcpy( temp, input, 8 ); |
653 | des_crypt_ecb( ctx, input, output ); |
654 | |
655 | for( i = 0; i < 8; i++ ) |
656 | output[i] = (unsigned char)( output[i] ^ iv[i] ); |
657 | |
658 | memcpy( iv, temp, 8 ); |
659 | |
660 | input += 8; |
661 | output += 8; |
662 | length -= 8; |
663 | } |
664 | } |
665 | |
666 | return( 0 ); |
667 | } |
668 | #endif /* POLARSSL_CIPHER_MODE_CBC */ |
669 | |
670 | /* |
671 | * 3DES-ECB block encryption/decryption |
672 | */ |
673 | int des3_crypt_ecb( des3_context *ctx, |
674 | const unsigned char input[8], |
675 | unsigned char output[8] ) |
676 | { |
677 | int i; |
678 | uint32_t X, Y, T, *SK; |
679 | |
680 | SK = ctx->sk; |
681 | |
682 | GET_UINT32_BE( X, input, 0 ); |
683 | GET_UINT32_BE( Y, input, 4 ); |
684 | |
685 | DES_IP( X, Y ); |
686 | |
687 | for( i = 0; i < 8; i++ ) |
688 | { |
689 | DES_ROUND( Y, X ); |
690 | DES_ROUND( X, Y ); |
691 | } |
692 | |
693 | for( i = 0; i < 8; i++ ) |
694 | { |
695 | DES_ROUND( X, Y ); |
696 | DES_ROUND( Y, X ); |
697 | } |
698 | |
699 | for( i = 0; i < 8; i++ ) |
700 | { |
701 | DES_ROUND( Y, X ); |
702 | DES_ROUND( X, Y ); |
703 | } |
704 | |
705 | DES_FP( Y, X ); |
706 | |
707 | PUT_UINT32_BE( Y, output, 0 ); |
708 | PUT_UINT32_BE( X, output, 4 ); |
709 | |
710 | return( 0 ); |
711 | } |
712 | |
713 | #if defined(POLARSSL_CIPHER_MODE_CBC) |
714 | /* |
715 | * 3DES-CBC buffer encryption/decryption |
716 | */ |
717 | int des3_crypt_cbc( des3_context *ctx, |
718 | int mode, |
719 | size_t length, |
720 | unsigned char iv[8], |
721 | const unsigned char *input, |
722 | unsigned char *output ) |
723 | { |
724 | int i; |
725 | unsigned char temp[8]; |
726 | |
727 | if( length % 8 ) |
728 | return( POLARSSL_ERR_DES_INVALID_INPUT_LENGTH ); |
729 | |
730 | if( mode == DES_ENCRYPT ) |
731 | { |
732 | while( length > 0 ) |
733 | { |
734 | for( i = 0; i < 8; i++ ) |
735 | output[i] = (unsigned char)( input[i] ^ iv[i] ); |
736 | |
737 | des3_crypt_ecb( ctx, output, output ); |
738 | memcpy( iv, output, 8 ); |
739 | |
740 | input += 8; |
741 | output += 8; |
742 | length -= 8; |
743 | } |
744 | } |
745 | else /* DES_DECRYPT */ |
746 | { |
747 | while( length > 0 ) |
748 | { |
749 | memcpy( temp, input, 8 ); |
750 | des3_crypt_ecb( ctx, input, output ); |
751 | |
752 | for( i = 0; i < 8; i++ ) |
753 | output[i] = (unsigned char)( output[i] ^ iv[i] ); |
754 | |
755 | memcpy( iv, temp, 8 ); |
756 | |
757 | input += 8; |
758 | output += 8; |
759 | length -= 8; |
760 | } |
761 | } |
762 | |
763 | return( 0 ); |
764 | } |
765 | #endif /* POLARSSL_CIPHER_MODE_CBC */ |
766 | |
767 | #endif /* !POLARSSL_DES_ALT */ |
768 | |
769 | #if defined(POLARSSL_SELF_TEST) |
770 | |
771 | #include <stdio.h> |
772 | |
773 | /* |
774 | * DES and 3DES test vectors from: |
775 | * |
776 | * http://csrc.nist.gov/groups/STM/cavp/documents/des/tripledes-vectors.zip |
777 | */ |
778 | static const unsigned char des3_test_keys[24] = |
779 | { |
780 | 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, |
781 | 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, |
782 | 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23 |
783 | }; |
784 | |
785 | static const unsigned char des3_test_buf[8] = |
786 | { |
787 | 0x4E, 0x6F, 0x77, 0x20, 0x69, 0x73, 0x20, 0x74 |
788 | }; |
789 | |
790 | static const unsigned char des3_test_ecb_dec[3][8] = |
791 | { |
792 | { 0xCD, 0xD6, 0x4F, 0x2F, 0x94, 0x27, 0xC1, 0x5D }, |
793 | { 0x69, 0x96, 0xC8, 0xFA, 0x47, 0xA2, 0xAB, 0xEB }, |
794 | { 0x83, 0x25, 0x39, 0x76, 0x44, 0x09, 0x1A, 0x0A } |
795 | }; |
796 | |
797 | static const unsigned char des3_test_ecb_enc[3][8] = |
798 | { |
799 | { 0x6A, 0x2A, 0x19, 0xF4, 0x1E, 0xCA, 0x85, 0x4B }, |
800 | { 0x03, 0xE6, 0x9F, 0x5B, 0xFA, 0x58, 0xEB, 0x42 }, |
801 | { 0xDD, 0x17, 0xE8, 0xB8, 0xB4, 0x37, 0xD2, 0x32 } |
802 | }; |
803 | |
804 | #if defined(POLARSSL_CIPHER_MODE_CBC) |
805 | static const unsigned char des3_test_iv[8] = |
806 | { |
807 | 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, |
808 | }; |
809 | |
810 | static const unsigned char des3_test_cbc_dec[3][8] = |
811 | { |
812 | { 0x12, 0x9F, 0x40, 0xB9, 0xD2, 0x00, 0x56, 0xB3 }, |
813 | { 0x47, 0x0E, 0xFC, 0x9A, 0x6B, 0x8E, 0xE3, 0x93 }, |
814 | { 0xC5, 0xCE, 0xCF, 0x63, 0xEC, 0xEC, 0x51, 0x4C } |
815 | }; |
816 | |
817 | static const unsigned char des3_test_cbc_enc[3][8] = |
818 | { |
819 | { 0x54, 0xF1, 0x5A, 0xF6, 0xEB, 0xE3, 0xA4, 0xB4 }, |
820 | { 0x35, 0x76, 0x11, 0x56, 0x5F, 0xA1, 0x8E, 0x4D }, |
821 | { 0xCB, 0x19, 0x1F, 0x85, 0xD1, 0xED, 0x84, 0x39 } |
822 | }; |
823 | #endif /* POLARSSL_CIPHER_MODE_CBC */ |
824 | |
825 | /* |
826 | * Checkup routine |
827 | */ |
828 | int des_self_test( int verbose ) |
829 | { |
830 | int i, j, u, v; |
831 | des_context ctx; |
832 | des3_context ctx3; |
833 | unsigned char key[24]; |
834 | unsigned char buf[8]; |
835 | #if defined(POLARSSL_CIPHER_MODE_CBC) |
836 | unsigned char prv[8]; |
837 | unsigned char iv[8]; |
838 | #endif |
839 | |
840 | memset( key, 0, 24 ); |
841 | |
842 | /* |
843 | * ECB mode |
844 | */ |
845 | for( i = 0; i < 6; i++ ) |
846 | { |
847 | u = i >> 1; |
848 | v = i & 1; |
849 | |
850 | if( verbose != 0 ) |
851 | polarssl_printf( " DES%c-ECB-%3d (%s): ", |
852 | ( u == 0 ) ? ' ' : '3', 56 + u * 56, |
853 | ( v == DES_DECRYPT ) ? "dec" : "enc" ); |
854 | |
855 | memcpy( buf, des3_test_buf, 8 ); |
856 | |
857 | switch( i ) |
858 | { |
859 | case 0: |
860 | des_setkey_dec( &ctx, des3_test_keys ); |
861 | break; |
862 | |
863 | case 1: |
864 | des_setkey_enc( &ctx, des3_test_keys ); |
865 | break; |
866 | |
867 | case 2: |
868 | des3_set2key_dec( &ctx3, des3_test_keys ); |
869 | break; |
870 | |
871 | case 3: |
872 | des3_set2key_enc( &ctx3, des3_test_keys ); |
873 | break; |
874 | |
875 | case 4: |
876 | des3_set3key_dec( &ctx3, des3_test_keys ); |
877 | break; |
878 | |
879 | case 5: |
880 | des3_set3key_enc( &ctx3, des3_test_keys ); |
881 | break; |
882 | |
883 | default: |
884 | return( 1 ); |
885 | } |
886 | |
887 | for( j = 0; j < 10000; j++ ) |
888 | { |
889 | if( u == 0 ) |
890 | des_crypt_ecb( &ctx, buf, buf ); |
891 | else |
892 | des3_crypt_ecb( &ctx3, buf, buf ); |
893 | } |
894 | |
895 | if( ( v == DES_DECRYPT && |
896 | memcmp( buf, des3_test_ecb_dec[u], 8 ) != 0 ) || |
897 | ( v != DES_DECRYPT && |
898 | memcmp( buf, des3_test_ecb_enc[u], 8 ) != 0 ) ) |
899 | { |
900 | if( verbose != 0 ) |
901 | polarssl_printf( "failed\n" ); |
902 | |
903 | return( 1 ); |
904 | } |
905 | |
906 | if( verbose != 0 ) |
907 | polarssl_printf( "passed\n" ); |
908 | } |
909 | |
910 | if( verbose != 0 ) |
911 | polarssl_printf( "\n" ); |
912 | |
913 | #if defined(POLARSSL_CIPHER_MODE_CBC) |
914 | /* |
915 | * CBC mode |
916 | */ |
917 | for( i = 0; i < 6; i++ ) |
918 | { |
919 | u = i >> 1; |
920 | v = i & 1; |
921 | |
922 | if( verbose != 0 ) |
923 | polarssl_printf( " DES%c-CBC-%3d (%s): ", |
924 | ( u == 0 ) ? ' ' : '3', 56 + u * 56, |
925 | ( v == DES_DECRYPT ) ? "dec" : "enc" ); |
926 | |
927 | memcpy( iv, des3_test_iv, 8 ); |
928 | memcpy( prv, des3_test_iv, 8 ); |
929 | memcpy( buf, des3_test_buf, 8 ); |
930 | |
931 | switch( i ) |
932 | { |
933 | case 0: |
934 | des_setkey_dec( &ctx, des3_test_keys ); |
935 | break; |
936 | |
937 | case 1: |
938 | des_setkey_enc( &ctx, des3_test_keys ); |
939 | break; |
940 | |
941 | case 2: |
942 | des3_set2key_dec( &ctx3, des3_test_keys ); |
943 | break; |
944 | |
945 | case 3: |
946 | des3_set2key_enc( &ctx3, des3_test_keys ); |
947 | break; |
948 | |
949 | case 4: |
950 | des3_set3key_dec( &ctx3, des3_test_keys ); |
951 | break; |
952 | |
953 | case 5: |
954 | des3_set3key_enc( &ctx3, des3_test_keys ); |
955 | break; |
956 | |
957 | default: |
958 | return( 1 ); |
959 | } |
960 | |
961 | if( v == DES_DECRYPT ) |
962 | { |
963 | for( j = 0; j < 10000; j++ ) |
964 | { |
965 | if( u == 0 ) |
966 | des_crypt_cbc( &ctx, v, 8, iv, buf, buf ); |
967 | else |
968 | des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf ); |
969 | } |
970 | } |
971 | else |
972 | { |
973 | for( j = 0; j < 10000; j++ ) |
974 | { |
975 | unsigned char tmp[8]; |
976 | |
977 | if( u == 0 ) |
978 | des_crypt_cbc( &ctx, v, 8, iv, buf, buf ); |
979 | else |
980 | des3_crypt_cbc( &ctx3, v, 8, iv, buf, buf ); |
981 | |
982 | memcpy( tmp, prv, 8 ); |
983 | memcpy( prv, buf, 8 ); |
984 | memcpy( buf, tmp, 8 ); |
985 | } |
986 | |
987 | memcpy( buf, prv, 8 ); |
988 | } |
989 | |
990 | if( ( v == DES_DECRYPT && |
991 | memcmp( buf, des3_test_cbc_dec[u], 8 ) != 0 ) || |
992 | ( v != DES_DECRYPT && |
993 | memcmp( buf, des3_test_cbc_enc[u], 8 ) != 0 ) ) |
994 | { |
995 | if( verbose != 0 ) |
996 | polarssl_printf( "failed\n" ); |
997 | |
998 | return( 1 ); |
999 | } |
1000 | |
1001 | if( verbose != 0 ) |
1002 | polarssl_printf( "passed\n" ); |
1003 | } |
1004 | #endif /* POLARSSL_CIPHER_MODE_CBC */ |
1005 | |
1006 | if( verbose != 0 ) |
1007 | polarssl_printf( "\n" ); |
1008 | |
1009 | return( 0 ); |
1010 | } |
1011 | |
1012 | #endif |
1013 | |
1014 | #endif |