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Source at commit b13e7eb172b6f08e5fc22da162bdde5fcde201b5 created 11 years 11 months ago. By Maarten ter Huurne, fbcon: Add 6x10 font | |
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1 | /* |
2 | * Cryptographic API. |
3 | * |
4 | * Serpent Cipher Algorithm. |
5 | * |
6 | * Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no> |
7 | * 2003 Herbert Valerio Riedel <hvr@gnu.org> |
8 | * |
9 | * Added tnepres support: |
10 | * Ruben Jesus Garcia Hernandez <ruben@ugr.es>, 18.10.2004 |
11 | * Based on code by hvr |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License as published by |
15 | * the Free Software Foundation; either version 2 of the License, or |
16 | * (at your option) any later version. |
17 | */ |
18 | |
19 | #include <linux/init.h> |
20 | #include <linux/module.h> |
21 | #include <linux/errno.h> |
22 | #include <asm/byteorder.h> |
23 | #include <linux/crypto.h> |
24 | #include <linux/types.h> |
25 | #include <crypto/serpent.h> |
26 | |
27 | /* Key is padded to the maximum of 256 bits before round key generation. |
28 | * Any key length <= 256 bits (32 bytes) is allowed by the algorithm. |
29 | */ |
30 | |
31 | #define PHI 0x9e3779b9UL |
32 | |
33 | #define keyiter(a, b, c, d, i, j) \ |
34 | ({ b ^= d; b ^= c; b ^= a; b ^= PHI ^ i; b = rol32(b, 11); k[j] = b; }) |
35 | |
36 | #define loadkeys(x0, x1, x2, x3, i) \ |
37 | ({ x0 = k[i]; x1 = k[i+1]; x2 = k[i+2]; x3 = k[i+3]; }) |
38 | |
39 | #define storekeys(x0, x1, x2, x3, i) \ |
40 | ({ k[i] = x0; k[i+1] = x1; k[i+2] = x2; k[i+3] = x3; }) |
41 | |
42 | #define store_and_load_keys(x0, x1, x2, x3, s, l) \ |
43 | ({ storekeys(x0, x1, x2, x3, s); loadkeys(x0, x1, x2, x3, l); }) |
44 | |
45 | #define K(x0, x1, x2, x3, i) ({ \ |
46 | x3 ^= k[4*(i)+3]; x2 ^= k[4*(i)+2]; \ |
47 | x1 ^= k[4*(i)+1]; x0 ^= k[4*(i)+0]; \ |
48 | }) |
49 | |
50 | #define LK(x0, x1, x2, x3, x4, i) ({ \ |
51 | x0 = rol32(x0, 13);\ |
52 | x2 = rol32(x2, 3); x1 ^= x0; x4 = x0 << 3; \ |
53 | x3 ^= x2; x1 ^= x2; \ |
54 | x1 = rol32(x1, 1); x3 ^= x4; \ |
55 | x3 = rol32(x3, 7); x4 = x1; \ |
56 | x0 ^= x1; x4 <<= 7; x2 ^= x3; \ |
57 | x0 ^= x3; x2 ^= x4; x3 ^= k[4*i+3]; \ |
58 | x1 ^= k[4*i+1]; x0 = rol32(x0, 5); x2 = rol32(x2, 22);\ |
59 | x0 ^= k[4*i+0]; x2 ^= k[4*i+2]; \ |
60 | }) |
61 | |
62 | #define KL(x0, x1, x2, x3, x4, i) ({ \ |
63 | x0 ^= k[4*i+0]; x1 ^= k[4*i+1]; x2 ^= k[4*i+2]; \ |
64 | x3 ^= k[4*i+3]; x0 = ror32(x0, 5); x2 = ror32(x2, 22);\ |
65 | x4 = x1; x2 ^= x3; x0 ^= x3; \ |
66 | x4 <<= 7; x0 ^= x1; x1 = ror32(x1, 1); \ |
67 | x2 ^= x4; x3 = ror32(x3, 7); x4 = x0 << 3; \ |
68 | x1 ^= x0; x3 ^= x4; x0 = ror32(x0, 13);\ |
69 | x1 ^= x2; x3 ^= x2; x2 = ror32(x2, 3); \ |
70 | }) |
71 | |
72 | #define S0(x0, x1, x2, x3, x4) ({ \ |
73 | x4 = x3; \ |
74 | x3 |= x0; x0 ^= x4; x4 ^= x2; \ |
75 | x4 = ~x4; x3 ^= x1; x1 &= x0; \ |
76 | x1 ^= x4; x2 ^= x0; x0 ^= x3; \ |
77 | x4 |= x0; x0 ^= x2; x2 &= x1; \ |
78 | x3 ^= x2; x1 = ~x1; x2 ^= x4; \ |
79 | x1 ^= x2; \ |
80 | }) |
81 | |
82 | #define S1(x0, x1, x2, x3, x4) ({ \ |
83 | x4 = x1; \ |
84 | x1 ^= x0; x0 ^= x3; x3 = ~x3; \ |
85 | x4 &= x1; x0 |= x1; x3 ^= x2; \ |
86 | x0 ^= x3; x1 ^= x3; x3 ^= x4; \ |
87 | x1 |= x4; x4 ^= x2; x2 &= x0; \ |
88 | x2 ^= x1; x1 |= x0; x0 = ~x0; \ |
89 | x0 ^= x2; x4 ^= x1; \ |
90 | }) |
91 | |
92 | #define S2(x0, x1, x2, x3, x4) ({ \ |
93 | x3 = ~x3; \ |
94 | x1 ^= x0; x4 = x0; x0 &= x2; \ |
95 | x0 ^= x3; x3 |= x4; x2 ^= x1; \ |
96 | x3 ^= x1; x1 &= x0; x0 ^= x2; \ |
97 | x2 &= x3; x3 |= x1; x0 = ~x0; \ |
98 | x3 ^= x0; x4 ^= x0; x0 ^= x2; \ |
99 | x1 |= x2; \ |
100 | }) |
101 | |
102 | #define S3(x0, x1, x2, x3, x4) ({ \ |
103 | x4 = x1; \ |
104 | x1 ^= x3; x3 |= x0; x4 &= x0; \ |
105 | x0 ^= x2; x2 ^= x1; x1 &= x3; \ |
106 | x2 ^= x3; x0 |= x4; x4 ^= x3; \ |
107 | x1 ^= x0; x0 &= x3; x3 &= x4; \ |
108 | x3 ^= x2; x4 |= x1; x2 &= x1; \ |
109 | x4 ^= x3; x0 ^= x3; x3 ^= x2; \ |
110 | }) |
111 | |
112 | #define S4(x0, x1, x2, x3, x4) ({ \ |
113 | x4 = x3; \ |
114 | x3 &= x0; x0 ^= x4; \ |
115 | x3 ^= x2; x2 |= x4; x0 ^= x1; \ |
116 | x4 ^= x3; x2 |= x0; \ |
117 | x2 ^= x1; x1 &= x0; \ |
118 | x1 ^= x4; x4 &= x2; x2 ^= x3; \ |
119 | x4 ^= x0; x3 |= x1; x1 = ~x1; \ |
120 | x3 ^= x0; \ |
121 | }) |
122 | |
123 | #define S5(x0, x1, x2, x3, x4) ({ \ |
124 | x4 = x1; x1 |= x0; \ |
125 | x2 ^= x1; x3 = ~x3; x4 ^= x0; \ |
126 | x0 ^= x2; x1 &= x4; x4 |= x3; \ |
127 | x4 ^= x0; x0 &= x3; x1 ^= x3; \ |
128 | x3 ^= x2; x0 ^= x1; x2 &= x4; \ |
129 | x1 ^= x2; x2 &= x0; \ |
130 | x3 ^= x2; \ |
131 | }) |
132 | |
133 | #define S6(x0, x1, x2, x3, x4) ({ \ |
134 | x4 = x1; \ |
135 | x3 ^= x0; x1 ^= x2; x2 ^= x0; \ |
136 | x0 &= x3; x1 |= x3; x4 = ~x4; \ |
137 | x0 ^= x1; x1 ^= x2; \ |
138 | x3 ^= x4; x4 ^= x0; x2 &= x0; \ |
139 | x4 ^= x1; x2 ^= x3; x3 &= x1; \ |
140 | x3 ^= x0; x1 ^= x2; \ |
141 | }) |
142 | |
143 | #define S7(x0, x1, x2, x3, x4) ({ \ |
144 | x1 = ~x1; \ |
145 | x4 = x1; x0 = ~x0; x1 &= x2; \ |
146 | x1 ^= x3; x3 |= x4; x4 ^= x2; \ |
147 | x2 ^= x3; x3 ^= x0; x0 |= x1; \ |
148 | x2 &= x0; x0 ^= x4; x4 ^= x3; \ |
149 | x3 &= x0; x4 ^= x1; \ |
150 | x2 ^= x4; x3 ^= x1; x4 |= x0; \ |
151 | x4 ^= x1; \ |
152 | }) |
153 | |
154 | #define SI0(x0, x1, x2, x3, x4) ({ \ |
155 | x4 = x3; x1 ^= x0; \ |
156 | x3 |= x1; x4 ^= x1; x0 = ~x0; \ |
157 | x2 ^= x3; x3 ^= x0; x0 &= x1; \ |
158 | x0 ^= x2; x2 &= x3; x3 ^= x4; \ |
159 | x2 ^= x3; x1 ^= x3; x3 &= x0; \ |
160 | x1 ^= x0; x0 ^= x2; x4 ^= x3; \ |
161 | }) |
162 | |
163 | #define SI1(x0, x1, x2, x3, x4) ({ \ |
164 | x1 ^= x3; x4 = x0; \ |
165 | x0 ^= x2; x2 = ~x2; x4 |= x1; \ |
166 | x4 ^= x3; x3 &= x1; x1 ^= x2; \ |
167 | x2 &= x4; x4 ^= x1; x1 |= x3; \ |
168 | x3 ^= x0; x2 ^= x0; x0 |= x4; \ |
169 | x2 ^= x4; x1 ^= x0; \ |
170 | x4 ^= x1; \ |
171 | }) |
172 | |
173 | #define SI2(x0, x1, x2, x3, x4) ({ \ |
174 | x2 ^= x1; x4 = x3; x3 = ~x3; \ |
175 | x3 |= x2; x2 ^= x4; x4 ^= x0; \ |
176 | x3 ^= x1; x1 |= x2; x2 ^= x0; \ |
177 | x1 ^= x4; x4 |= x3; x2 ^= x3; \ |
178 | x4 ^= x2; x2 &= x1; \ |
179 | x2 ^= x3; x3 ^= x4; x4 ^= x0; \ |
180 | }) |
181 | |
182 | #define SI3(x0, x1, x2, x3, x4) ({ \ |
183 | x2 ^= x1; \ |
184 | x4 = x1; x1 &= x2; \ |
185 | x1 ^= x0; x0 |= x4; x4 ^= x3; \ |
186 | x0 ^= x3; x3 |= x1; x1 ^= x2; \ |
187 | x1 ^= x3; x0 ^= x2; x2 ^= x3; \ |
188 | x3 &= x1; x1 ^= x0; x0 &= x2; \ |
189 | x4 ^= x3; x3 ^= x0; x0 ^= x1; \ |
190 | }) |
191 | |
192 | #define SI4(x0, x1, x2, x3, x4) ({ \ |
193 | x2 ^= x3; x4 = x0; x0 &= x1; \ |
194 | x0 ^= x2; x2 |= x3; x4 = ~x4; \ |
195 | x1 ^= x0; x0 ^= x2; x2 &= x4; \ |
196 | x2 ^= x0; x0 |= x4; \ |
197 | x0 ^= x3; x3 &= x2; \ |
198 | x4 ^= x3; x3 ^= x1; x1 &= x0; \ |
199 | x4 ^= x1; x0 ^= x3; \ |
200 | }) |
201 | |
202 | #define SI5(x0, x1, x2, x3, x4) ({ \ |
203 | x4 = x1; x1 |= x2; \ |
204 | x2 ^= x4; x1 ^= x3; x3 &= x4; \ |
205 | x2 ^= x3; x3 |= x0; x0 = ~x0; \ |
206 | x3 ^= x2; x2 |= x0; x4 ^= x1; \ |
207 | x2 ^= x4; x4 &= x0; x0 ^= x1; \ |
208 | x1 ^= x3; x0 &= x2; x2 ^= x3; \ |
209 | x0 ^= x2; x2 ^= x4; x4 ^= x3; \ |
210 | }) |
211 | |
212 | #define SI6(x0, x1, x2, x3, x4) ({ \ |
213 | x0 ^= x2; \ |
214 | x4 = x0; x0 &= x3; x2 ^= x3; \ |
215 | x0 ^= x2; x3 ^= x1; x2 |= x4; \ |
216 | x2 ^= x3; x3 &= x0; x0 = ~x0; \ |
217 | x3 ^= x1; x1 &= x2; x4 ^= x0; \ |
218 | x3 ^= x4; x4 ^= x2; x0 ^= x1; \ |
219 | x2 ^= x0; \ |
220 | }) |
221 | |
222 | #define SI7(x0, x1, x2, x3, x4) ({ \ |
223 | x4 = x3; x3 &= x0; x0 ^= x2; \ |
224 | x2 |= x4; x4 ^= x1; x0 = ~x0; \ |
225 | x1 |= x3; x4 ^= x0; x0 &= x2; \ |
226 | x0 ^= x1; x1 &= x2; x3 ^= x2; \ |
227 | x4 ^= x3; x2 &= x3; x3 |= x0; \ |
228 | x1 ^= x4; x3 ^= x4; x4 &= x0; \ |
229 | x4 ^= x2; \ |
230 | }) |
231 | |
232 | int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key, |
233 | unsigned int keylen) |
234 | { |
235 | u32 *k = ctx->expkey; |
236 | u8 *k8 = (u8 *)k; |
237 | u32 r0, r1, r2, r3, r4; |
238 | int i; |
239 | |
240 | /* Copy key, add padding */ |
241 | |
242 | for (i = 0; i < keylen; ++i) |
243 | k8[i] = key[i]; |
244 | if (i < SERPENT_MAX_KEY_SIZE) |
245 | k8[i++] = 1; |
246 | while (i < SERPENT_MAX_KEY_SIZE) |
247 | k8[i++] = 0; |
248 | |
249 | /* Expand key using polynomial */ |
250 | |
251 | r0 = le32_to_cpu(k[3]); |
252 | r1 = le32_to_cpu(k[4]); |
253 | r2 = le32_to_cpu(k[5]); |
254 | r3 = le32_to_cpu(k[6]); |
255 | r4 = le32_to_cpu(k[7]); |
256 | |
257 | keyiter(le32_to_cpu(k[0]), r0, r4, r2, 0, 0); |
258 | keyiter(le32_to_cpu(k[1]), r1, r0, r3, 1, 1); |
259 | keyiter(le32_to_cpu(k[2]), r2, r1, r4, 2, 2); |
260 | keyiter(le32_to_cpu(k[3]), r3, r2, r0, 3, 3); |
261 | keyiter(le32_to_cpu(k[4]), r4, r3, r1, 4, 4); |
262 | keyiter(le32_to_cpu(k[5]), r0, r4, r2, 5, 5); |
263 | keyiter(le32_to_cpu(k[6]), r1, r0, r3, 6, 6); |
264 | keyiter(le32_to_cpu(k[7]), r2, r1, r4, 7, 7); |
265 | |
266 | keyiter(k[0], r3, r2, r0, 8, 8); |
267 | keyiter(k[1], r4, r3, r1, 9, 9); |
268 | keyiter(k[2], r0, r4, r2, 10, 10); |
269 | keyiter(k[3], r1, r0, r3, 11, 11); |
270 | keyiter(k[4], r2, r1, r4, 12, 12); |
271 | keyiter(k[5], r3, r2, r0, 13, 13); |
272 | keyiter(k[6], r4, r3, r1, 14, 14); |
273 | keyiter(k[7], r0, r4, r2, 15, 15); |
274 | keyiter(k[8], r1, r0, r3, 16, 16); |
275 | keyiter(k[9], r2, r1, r4, 17, 17); |
276 | keyiter(k[10], r3, r2, r0, 18, 18); |
277 | keyiter(k[11], r4, r3, r1, 19, 19); |
278 | keyiter(k[12], r0, r4, r2, 20, 20); |
279 | keyiter(k[13], r1, r0, r3, 21, 21); |
280 | keyiter(k[14], r2, r1, r4, 22, 22); |
281 | keyiter(k[15], r3, r2, r0, 23, 23); |
282 | keyiter(k[16], r4, r3, r1, 24, 24); |
283 | keyiter(k[17], r0, r4, r2, 25, 25); |
284 | keyiter(k[18], r1, r0, r3, 26, 26); |
285 | keyiter(k[19], r2, r1, r4, 27, 27); |
286 | keyiter(k[20], r3, r2, r0, 28, 28); |
287 | keyiter(k[21], r4, r3, r1, 29, 29); |
288 | keyiter(k[22], r0, r4, r2, 30, 30); |
289 | keyiter(k[23], r1, r0, r3, 31, 31); |
290 | |
291 | k += 50; |
292 | |
293 | keyiter(k[-26], r2, r1, r4, 32, -18); |
294 | keyiter(k[-25], r3, r2, r0, 33, -17); |
295 | keyiter(k[-24], r4, r3, r1, 34, -16); |
296 | keyiter(k[-23], r0, r4, r2, 35, -15); |
297 | keyiter(k[-22], r1, r0, r3, 36, -14); |
298 | keyiter(k[-21], r2, r1, r4, 37, -13); |
299 | keyiter(k[-20], r3, r2, r0, 38, -12); |
300 | keyiter(k[-19], r4, r3, r1, 39, -11); |
301 | keyiter(k[-18], r0, r4, r2, 40, -10); |
302 | keyiter(k[-17], r1, r0, r3, 41, -9); |
303 | keyiter(k[-16], r2, r1, r4, 42, -8); |
304 | keyiter(k[-15], r3, r2, r0, 43, -7); |
305 | keyiter(k[-14], r4, r3, r1, 44, -6); |
306 | keyiter(k[-13], r0, r4, r2, 45, -5); |
307 | keyiter(k[-12], r1, r0, r3, 46, -4); |
308 | keyiter(k[-11], r2, r1, r4, 47, -3); |
309 | keyiter(k[-10], r3, r2, r0, 48, -2); |
310 | keyiter(k[-9], r4, r3, r1, 49, -1); |
311 | keyiter(k[-8], r0, r4, r2, 50, 0); |
312 | keyiter(k[-7], r1, r0, r3, 51, 1); |
313 | keyiter(k[-6], r2, r1, r4, 52, 2); |
314 | keyiter(k[-5], r3, r2, r0, 53, 3); |
315 | keyiter(k[-4], r4, r3, r1, 54, 4); |
316 | keyiter(k[-3], r0, r4, r2, 55, 5); |
317 | keyiter(k[-2], r1, r0, r3, 56, 6); |
318 | keyiter(k[-1], r2, r1, r4, 57, 7); |
319 | keyiter(k[0], r3, r2, r0, 58, 8); |
320 | keyiter(k[1], r4, r3, r1, 59, 9); |
321 | keyiter(k[2], r0, r4, r2, 60, 10); |
322 | keyiter(k[3], r1, r0, r3, 61, 11); |
323 | keyiter(k[4], r2, r1, r4, 62, 12); |
324 | keyiter(k[5], r3, r2, r0, 63, 13); |
325 | keyiter(k[6], r4, r3, r1, 64, 14); |
326 | keyiter(k[7], r0, r4, r2, 65, 15); |
327 | keyiter(k[8], r1, r0, r3, 66, 16); |
328 | keyiter(k[9], r2, r1, r4, 67, 17); |
329 | keyiter(k[10], r3, r2, r0, 68, 18); |
330 | keyiter(k[11], r4, r3, r1, 69, 19); |
331 | keyiter(k[12], r0, r4, r2, 70, 20); |
332 | keyiter(k[13], r1, r0, r3, 71, 21); |
333 | keyiter(k[14], r2, r1, r4, 72, 22); |
334 | keyiter(k[15], r3, r2, r0, 73, 23); |
335 | keyiter(k[16], r4, r3, r1, 74, 24); |
336 | keyiter(k[17], r0, r4, r2, 75, 25); |
337 | keyiter(k[18], r1, r0, r3, 76, 26); |
338 | keyiter(k[19], r2, r1, r4, 77, 27); |
339 | keyiter(k[20], r3, r2, r0, 78, 28); |
340 | keyiter(k[21], r4, r3, r1, 79, 29); |
341 | keyiter(k[22], r0, r4, r2, 80, 30); |
342 | keyiter(k[23], r1, r0, r3, 81, 31); |
343 | |
344 | k += 50; |
345 | |
346 | keyiter(k[-26], r2, r1, r4, 82, -18); |
347 | keyiter(k[-25], r3, r2, r0, 83, -17); |
348 | keyiter(k[-24], r4, r3, r1, 84, -16); |
349 | keyiter(k[-23], r0, r4, r2, 85, -15); |
350 | keyiter(k[-22], r1, r0, r3, 86, -14); |
351 | keyiter(k[-21], r2, r1, r4, 87, -13); |
352 | keyiter(k[-20], r3, r2, r0, 88, -12); |
353 | keyiter(k[-19], r4, r3, r1, 89, -11); |
354 | keyiter(k[-18], r0, r4, r2, 90, -10); |
355 | keyiter(k[-17], r1, r0, r3, 91, -9); |
356 | keyiter(k[-16], r2, r1, r4, 92, -8); |
357 | keyiter(k[-15], r3, r2, r0, 93, -7); |
358 | keyiter(k[-14], r4, r3, r1, 94, -6); |
359 | keyiter(k[-13], r0, r4, r2, 95, -5); |
360 | keyiter(k[-12], r1, r0, r3, 96, -4); |
361 | keyiter(k[-11], r2, r1, r4, 97, -3); |
362 | keyiter(k[-10], r3, r2, r0, 98, -2); |
363 | keyiter(k[-9], r4, r3, r1, 99, -1); |
364 | keyiter(k[-8], r0, r4, r2, 100, 0); |
365 | keyiter(k[-7], r1, r0, r3, 101, 1); |
366 | keyiter(k[-6], r2, r1, r4, 102, 2); |
367 | keyiter(k[-5], r3, r2, r0, 103, 3); |
368 | keyiter(k[-4], r4, r3, r1, 104, 4); |
369 | keyiter(k[-3], r0, r4, r2, 105, 5); |
370 | keyiter(k[-2], r1, r0, r3, 106, 6); |
371 | keyiter(k[-1], r2, r1, r4, 107, 7); |
372 | keyiter(k[0], r3, r2, r0, 108, 8); |
373 | keyiter(k[1], r4, r3, r1, 109, 9); |
374 | keyiter(k[2], r0, r4, r2, 110, 10); |
375 | keyiter(k[3], r1, r0, r3, 111, 11); |
376 | keyiter(k[4], r2, r1, r4, 112, 12); |
377 | keyiter(k[5], r3, r2, r0, 113, 13); |
378 | keyiter(k[6], r4, r3, r1, 114, 14); |
379 | keyiter(k[7], r0, r4, r2, 115, 15); |
380 | keyiter(k[8], r1, r0, r3, 116, 16); |
381 | keyiter(k[9], r2, r1, r4, 117, 17); |
382 | keyiter(k[10], r3, r2, r0, 118, 18); |
383 | keyiter(k[11], r4, r3, r1, 119, 19); |
384 | keyiter(k[12], r0, r4, r2, 120, 20); |
385 | keyiter(k[13], r1, r0, r3, 121, 21); |
386 | keyiter(k[14], r2, r1, r4, 122, 22); |
387 | keyiter(k[15], r3, r2, r0, 123, 23); |
388 | keyiter(k[16], r4, r3, r1, 124, 24); |
389 | keyiter(k[17], r0, r4, r2, 125, 25); |
390 | keyiter(k[18], r1, r0, r3, 126, 26); |
391 | keyiter(k[19], r2, r1, r4, 127, 27); |
392 | keyiter(k[20], r3, r2, r0, 128, 28); |
393 | keyiter(k[21], r4, r3, r1, 129, 29); |
394 | keyiter(k[22], r0, r4, r2, 130, 30); |
395 | keyiter(k[23], r1, r0, r3, 131, 31); |
396 | |
397 | /* Apply S-boxes */ |
398 | |
399 | S3(r3, r4, r0, r1, r2); store_and_load_keys(r1, r2, r4, r3, 28, 24); |
400 | S4(r1, r2, r4, r3, r0); store_and_load_keys(r2, r4, r3, r0, 24, 20); |
401 | S5(r2, r4, r3, r0, r1); store_and_load_keys(r1, r2, r4, r0, 20, 16); |
402 | S6(r1, r2, r4, r0, r3); store_and_load_keys(r4, r3, r2, r0, 16, 12); |
403 | S7(r4, r3, r2, r0, r1); store_and_load_keys(r1, r2, r0, r4, 12, 8); |
404 | S0(r1, r2, r0, r4, r3); store_and_load_keys(r0, r2, r4, r1, 8, 4); |
405 | S1(r0, r2, r4, r1, r3); store_and_load_keys(r3, r4, r1, r0, 4, 0); |
406 | S2(r3, r4, r1, r0, r2); store_and_load_keys(r2, r4, r3, r0, 0, -4); |
407 | S3(r2, r4, r3, r0, r1); store_and_load_keys(r0, r1, r4, r2, -4, -8); |
408 | S4(r0, r1, r4, r2, r3); store_and_load_keys(r1, r4, r2, r3, -8, -12); |
409 | S5(r1, r4, r2, r3, r0); store_and_load_keys(r0, r1, r4, r3, -12, -16); |
410 | S6(r0, r1, r4, r3, r2); store_and_load_keys(r4, r2, r1, r3, -16, -20); |
411 | S7(r4, r2, r1, r3, r0); store_and_load_keys(r0, r1, r3, r4, -20, -24); |
412 | S0(r0, r1, r3, r4, r2); store_and_load_keys(r3, r1, r4, r0, -24, -28); |
413 | k -= 50; |
414 | S1(r3, r1, r4, r0, r2); store_and_load_keys(r2, r4, r0, r3, 22, 18); |
415 | S2(r2, r4, r0, r3, r1); store_and_load_keys(r1, r4, r2, r3, 18, 14); |
416 | S3(r1, r4, r2, r3, r0); store_and_load_keys(r3, r0, r4, r1, 14, 10); |
417 | S4(r3, r0, r4, r1, r2); store_and_load_keys(r0, r4, r1, r2, 10, 6); |
418 | S5(r0, r4, r1, r2, r3); store_and_load_keys(r3, r0, r4, r2, 6, 2); |
419 | S6(r3, r0, r4, r2, r1); store_and_load_keys(r4, r1, r0, r2, 2, -2); |
420 | S7(r4, r1, r0, r2, r3); store_and_load_keys(r3, r0, r2, r4, -2, -6); |
421 | S0(r3, r0, r2, r4, r1); store_and_load_keys(r2, r0, r4, r3, -6, -10); |
422 | S1(r2, r0, r4, r3, r1); store_and_load_keys(r1, r4, r3, r2, -10, -14); |
423 | S2(r1, r4, r3, r2, r0); store_and_load_keys(r0, r4, r1, r2, -14, -18); |
424 | S3(r0, r4, r1, r2, r3); store_and_load_keys(r2, r3, r4, r0, -18, -22); |
425 | k -= 50; |
426 | S4(r2, r3, r4, r0, r1); store_and_load_keys(r3, r4, r0, r1, 28, 24); |
427 | S5(r3, r4, r0, r1, r2); store_and_load_keys(r2, r3, r4, r1, 24, 20); |
428 | S6(r2, r3, r4, r1, r0); store_and_load_keys(r4, r0, r3, r1, 20, 16); |
429 | S7(r4, r0, r3, r1, r2); store_and_load_keys(r2, r3, r1, r4, 16, 12); |
430 | S0(r2, r3, r1, r4, r0); store_and_load_keys(r1, r3, r4, r2, 12, 8); |
431 | S1(r1, r3, r4, r2, r0); store_and_load_keys(r0, r4, r2, r1, 8, 4); |
432 | S2(r0, r4, r2, r1, r3); store_and_load_keys(r3, r4, r0, r1, 4, 0); |
433 | S3(r3, r4, r0, r1, r2); storekeys(r1, r2, r4, r3, 0); |
434 | |
435 | return 0; |
436 | } |
437 | EXPORT_SYMBOL_GPL(__serpent_setkey); |
438 | |
439 | int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) |
440 | { |
441 | return __serpent_setkey(crypto_tfm_ctx(tfm), key, keylen); |
442 | } |
443 | EXPORT_SYMBOL_GPL(serpent_setkey); |
444 | |
445 | void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src) |
446 | { |
447 | const u32 *k = ctx->expkey; |
448 | const __le32 *s = (const __le32 *)src; |
449 | __le32 *d = (__le32 *)dst; |
450 | u32 r0, r1, r2, r3, r4; |
451 | |
452 | /* |
453 | * Note: The conversions between u8* and u32* might cause trouble |
454 | * on architectures with stricter alignment rules than x86 |
455 | */ |
456 | |
457 | r0 = le32_to_cpu(s[0]); |
458 | r1 = le32_to_cpu(s[1]); |
459 | r2 = le32_to_cpu(s[2]); |
460 | r3 = le32_to_cpu(s[3]); |
461 | |
462 | K(r0, r1, r2, r3, 0); |
463 | S0(r0, r1, r2, r3, r4); LK(r2, r1, r3, r0, r4, 1); |
464 | S1(r2, r1, r3, r0, r4); LK(r4, r3, r0, r2, r1, 2); |
465 | S2(r4, r3, r0, r2, r1); LK(r1, r3, r4, r2, r0, 3); |
466 | S3(r1, r3, r4, r2, r0); LK(r2, r0, r3, r1, r4, 4); |
467 | S4(r2, r0, r3, r1, r4); LK(r0, r3, r1, r4, r2, 5); |
468 | S5(r0, r3, r1, r4, r2); LK(r2, r0, r3, r4, r1, 6); |
469 | S6(r2, r0, r3, r4, r1); LK(r3, r1, r0, r4, r2, 7); |
470 | S7(r3, r1, r0, r4, r2); LK(r2, r0, r4, r3, r1, 8); |
471 | S0(r2, r0, r4, r3, r1); LK(r4, r0, r3, r2, r1, 9); |
472 | S1(r4, r0, r3, r2, r1); LK(r1, r3, r2, r4, r0, 10); |
473 | S2(r1, r3, r2, r4, r0); LK(r0, r3, r1, r4, r2, 11); |
474 | S3(r0, r3, r1, r4, r2); LK(r4, r2, r3, r0, r1, 12); |
475 | S4(r4, r2, r3, r0, r1); LK(r2, r3, r0, r1, r4, 13); |
476 | S5(r2, r3, r0, r1, r4); LK(r4, r2, r3, r1, r0, 14); |
477 | S6(r4, r2, r3, r1, r0); LK(r3, r0, r2, r1, r4, 15); |
478 | S7(r3, r0, r2, r1, r4); LK(r4, r2, r1, r3, r0, 16); |
479 | S0(r4, r2, r1, r3, r0); LK(r1, r2, r3, r4, r0, 17); |
480 | S1(r1, r2, r3, r4, r0); LK(r0, r3, r4, r1, r2, 18); |
481 | S2(r0, r3, r4, r1, r2); LK(r2, r3, r0, r1, r4, 19); |
482 | S3(r2, r3, r0, r1, r4); LK(r1, r4, r3, r2, r0, 20); |
483 | S4(r1, r4, r3, r2, r0); LK(r4, r3, r2, r0, r1, 21); |
484 | S5(r4, r3, r2, r0, r1); LK(r1, r4, r3, r0, r2, 22); |
485 | S6(r1, r4, r3, r0, r2); LK(r3, r2, r4, r0, r1, 23); |
486 | S7(r3, r2, r4, r0, r1); LK(r1, r4, r0, r3, r2, 24); |
487 | S0(r1, r4, r0, r3, r2); LK(r0, r4, r3, r1, r2, 25); |
488 | S1(r0, r4, r3, r1, r2); LK(r2, r3, r1, r0, r4, 26); |
489 | S2(r2, r3, r1, r0, r4); LK(r4, r3, r2, r0, r1, 27); |
490 | S3(r4, r3, r2, r0, r1); LK(r0, r1, r3, r4, r2, 28); |
491 | S4(r0, r1, r3, r4, r2); LK(r1, r3, r4, r2, r0, 29); |
492 | S5(r1, r3, r4, r2, r0); LK(r0, r1, r3, r2, r4, 30); |
493 | S6(r0, r1, r3, r2, r4); LK(r3, r4, r1, r2, r0, 31); |
494 | S7(r3, r4, r1, r2, r0); K(r0, r1, r2, r3, 32); |
495 | |
496 | d[0] = cpu_to_le32(r0); |
497 | d[1] = cpu_to_le32(r1); |
498 | d[2] = cpu_to_le32(r2); |
499 | d[3] = cpu_to_le32(r3); |
500 | } |
501 | EXPORT_SYMBOL_GPL(__serpent_encrypt); |
502 | |
503 | static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
504 | { |
505 | struct serpent_ctx *ctx = crypto_tfm_ctx(tfm); |
506 | |
507 | __serpent_encrypt(ctx, dst, src); |
508 | } |
509 | |
510 | void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src) |
511 | { |
512 | const u32 *k = ctx->expkey; |
513 | const __le32 *s = (const __le32 *)src; |
514 | __le32 *d = (__le32 *)dst; |
515 | u32 r0, r1, r2, r3, r4; |
516 | |
517 | r0 = le32_to_cpu(s[0]); |
518 | r1 = le32_to_cpu(s[1]); |
519 | r2 = le32_to_cpu(s[2]); |
520 | r3 = le32_to_cpu(s[3]); |
521 | |
522 | K(r0, r1, r2, r3, 32); |
523 | SI7(r0, r1, r2, r3, r4); KL(r1, r3, r0, r4, r2, 31); |
524 | SI6(r1, r3, r0, r4, r2); KL(r0, r2, r4, r1, r3, 30); |
525 | SI5(r0, r2, r4, r1, r3); KL(r2, r3, r0, r4, r1, 29); |
526 | SI4(r2, r3, r0, r4, r1); KL(r2, r0, r1, r4, r3, 28); |
527 | SI3(r2, r0, r1, r4, r3); KL(r1, r2, r3, r4, r0, 27); |
528 | SI2(r1, r2, r3, r4, r0); KL(r2, r0, r4, r3, r1, 26); |
529 | SI1(r2, r0, r4, r3, r1); KL(r1, r0, r4, r3, r2, 25); |
530 | SI0(r1, r0, r4, r3, r2); KL(r4, r2, r0, r1, r3, 24); |
531 | SI7(r4, r2, r0, r1, r3); KL(r2, r1, r4, r3, r0, 23); |
532 | SI6(r2, r1, r4, r3, r0); KL(r4, r0, r3, r2, r1, 22); |
533 | SI5(r4, r0, r3, r2, r1); KL(r0, r1, r4, r3, r2, 21); |
534 | SI4(r0, r1, r4, r3, r2); KL(r0, r4, r2, r3, r1, 20); |
535 | SI3(r0, r4, r2, r3, r1); KL(r2, r0, r1, r3, r4, 19); |
536 | SI2(r2, r0, r1, r3, r4); KL(r0, r4, r3, r1, r2, 18); |
537 | SI1(r0, r4, r3, r1, r2); KL(r2, r4, r3, r1, r0, 17); |
538 | SI0(r2, r4, r3, r1, r0); KL(r3, r0, r4, r2, r1, 16); |
539 | SI7(r3, r0, r4, r2, r1); KL(r0, r2, r3, r1, r4, 15); |
540 | SI6(r0, r2, r3, r1, r4); KL(r3, r4, r1, r0, r2, 14); |
541 | SI5(r3, r4, r1, r0, r2); KL(r4, r2, r3, r1, r0, 13); |
542 | SI4(r4, r2, r3, r1, r0); KL(r4, r3, r0, r1, r2, 12); |
543 | SI3(r4, r3, r0, r1, r2); KL(r0, r4, r2, r1, r3, 11); |
544 | SI2(r0, r4, r2, r1, r3); KL(r4, r3, r1, r2, r0, 10); |
545 | SI1(r4, r3, r1, r2, r0); KL(r0, r3, r1, r2, r4, 9); |
546 | SI0(r0, r3, r1, r2, r4); KL(r1, r4, r3, r0, r2, 8); |
547 | SI7(r1, r4, r3, r0, r2); KL(r4, r0, r1, r2, r3, 7); |
548 | SI6(r4, r0, r1, r2, r3); KL(r1, r3, r2, r4, r0, 6); |
549 | SI5(r1, r3, r2, r4, r0); KL(r3, r0, r1, r2, r4, 5); |
550 | SI4(r3, r0, r1, r2, r4); KL(r3, r1, r4, r2, r0, 4); |
551 | SI3(r3, r1, r4, r2, r0); KL(r4, r3, r0, r2, r1, 3); |
552 | SI2(r4, r3, r0, r2, r1); KL(r3, r1, r2, r0, r4, 2); |
553 | SI1(r3, r1, r2, r0, r4); KL(r4, r1, r2, r0, r3, 1); |
554 | SI0(r4, r1, r2, r0, r3); K(r2, r3, r1, r4, 0); |
555 | |
556 | d[0] = cpu_to_le32(r2); |
557 | d[1] = cpu_to_le32(r3); |
558 | d[2] = cpu_to_le32(r1); |
559 | d[3] = cpu_to_le32(r4); |
560 | } |
561 | EXPORT_SYMBOL_GPL(__serpent_decrypt); |
562 | |
563 | static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
564 | { |
565 | struct serpent_ctx *ctx = crypto_tfm_ctx(tfm); |
566 | |
567 | __serpent_decrypt(ctx, dst, src); |
568 | } |
569 | |
570 | static struct crypto_alg serpent_alg = { |
571 | .cra_name = "serpent", |
572 | .cra_driver_name = "serpent-generic", |
573 | .cra_priority = 100, |
574 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
575 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
576 | .cra_ctxsize = sizeof(struct serpent_ctx), |
577 | .cra_alignmask = 3, |
578 | .cra_module = THIS_MODULE, |
579 | .cra_list = LIST_HEAD_INIT(serpent_alg.cra_list), |
580 | .cra_u = { .cipher = { |
581 | .cia_min_keysize = SERPENT_MIN_KEY_SIZE, |
582 | .cia_max_keysize = SERPENT_MAX_KEY_SIZE, |
583 | .cia_setkey = serpent_setkey, |
584 | .cia_encrypt = serpent_encrypt, |
585 | .cia_decrypt = serpent_decrypt } } |
586 | }; |
587 | |
588 | static int tnepres_setkey(struct crypto_tfm *tfm, const u8 *key, |
589 | unsigned int keylen) |
590 | { |
591 | u8 rev_key[SERPENT_MAX_KEY_SIZE]; |
592 | int i; |
593 | |
594 | for (i = 0; i < keylen; ++i) |
595 | rev_key[keylen - i - 1] = key[i]; |
596 | |
597 | return serpent_setkey(tfm, rev_key, keylen); |
598 | } |
599 | |
600 | static void tnepres_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
601 | { |
602 | const u32 * const s = (const u32 * const)src; |
603 | u32 * const d = (u32 * const)dst; |
604 | |
605 | u32 rs[4], rd[4]; |
606 | |
607 | rs[0] = swab32(s[3]); |
608 | rs[1] = swab32(s[2]); |
609 | rs[2] = swab32(s[1]); |
610 | rs[3] = swab32(s[0]); |
611 | |
612 | serpent_encrypt(tfm, (u8 *)rd, (u8 *)rs); |
613 | |
614 | d[0] = swab32(rd[3]); |
615 | d[1] = swab32(rd[2]); |
616 | d[2] = swab32(rd[1]); |
617 | d[3] = swab32(rd[0]); |
618 | } |
619 | |
620 | static void tnepres_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
621 | { |
622 | const u32 * const s = (const u32 * const)src; |
623 | u32 * const d = (u32 * const)dst; |
624 | |
625 | u32 rs[4], rd[4]; |
626 | |
627 | rs[0] = swab32(s[3]); |
628 | rs[1] = swab32(s[2]); |
629 | rs[2] = swab32(s[1]); |
630 | rs[3] = swab32(s[0]); |
631 | |
632 | serpent_decrypt(tfm, (u8 *)rd, (u8 *)rs); |
633 | |
634 | d[0] = swab32(rd[3]); |
635 | d[1] = swab32(rd[2]); |
636 | d[2] = swab32(rd[1]); |
637 | d[3] = swab32(rd[0]); |
638 | } |
639 | |
640 | static struct crypto_alg tnepres_alg = { |
641 | .cra_name = "tnepres", |
642 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
643 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
644 | .cra_ctxsize = sizeof(struct serpent_ctx), |
645 | .cra_alignmask = 3, |
646 | .cra_module = THIS_MODULE, |
647 | .cra_list = LIST_HEAD_INIT(serpent_alg.cra_list), |
648 | .cra_u = { .cipher = { |
649 | .cia_min_keysize = SERPENT_MIN_KEY_SIZE, |
650 | .cia_max_keysize = SERPENT_MAX_KEY_SIZE, |
651 | .cia_setkey = tnepres_setkey, |
652 | .cia_encrypt = tnepres_encrypt, |
653 | .cia_decrypt = tnepres_decrypt } } |
654 | }; |
655 | |
656 | static int __init serpent_mod_init(void) |
657 | { |
658 | int ret = crypto_register_alg(&serpent_alg); |
659 | |
660 | if (ret) |
661 | return ret; |
662 | |
663 | ret = crypto_register_alg(&tnepres_alg); |
664 | |
665 | if (ret) |
666 | crypto_unregister_alg(&serpent_alg); |
667 | |
668 | return ret; |
669 | } |
670 | |
671 | static void __exit serpent_mod_fini(void) |
672 | { |
673 | crypto_unregister_alg(&tnepres_alg); |
674 | crypto_unregister_alg(&serpent_alg); |
675 | } |
676 | |
677 | module_init(serpent_mod_init); |
678 | module_exit(serpent_mod_fini); |
679 | |
680 | MODULE_LICENSE("GPL"); |
681 | MODULE_DESCRIPTION("Serpent and tnepres (kerneli compatible serpent reversed) Cipher Algorithm"); |
682 | MODULE_AUTHOR("Dag Arne Osvik <osvik@ii.uib.no>"); |
683 | MODULE_ALIAS("tnepres"); |
684 | MODULE_ALIAS("serpent"); |
685 |
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