]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - crypto/serpent_generic.c
4 * Serpent Cipher Algorithm.
6 * Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
7 * 2003 Herbert Valerio Riedel <hvr@gnu.org>
9 * Added tnepres support:
10 * Ruben Jesus Garcia Hernandez <ruben@ugr.es>, 18.10.2004
11 * Based on code by hvr
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.
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>
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.
31 #define PHI 0x9e3779b9UL
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; })
36 #define loadkeys(x0, x1, x2, x3, i) \
37 ({ x0 = k[i]; x1 = k[i+1]; x2 = k[i+2]; x3 = k[i+3]; })
39 #define storekeys(x0, x1, x2, x3, i) \
40 ({ k[i] = x0; k[i+1] = x1; k[i+2] = x2; k[i+3] = x3; })
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); })
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]; \
50 #define LK(x0, x1, x2, x3, x4, i) ({ \
52 x2 = rol32(x2, 3); x1 ^= x0; x4 = x0 << 3; \
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]; \
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); \
72 #define S0(x0, x1, x2, x3, x4) ({ \
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; \
82 #define S1(x0, x1, x2, x3, x4) ({ \
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; \
92 #define S2(x0, x1, x2, x3, x4) ({ \
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; \
102 #define S3(x0, x1, x2, x3, x4) ({ \
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; \
112 #define S4(x0, x1, x2, x3, x4) ({ \
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; \
123 #define S5(x0, x1, x2, x3, x4) ({ \
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; \
133 #define S6(x0, x1, x2, x3, x4) ({ \
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; \
143 #define S7(x0, x1, x2, x3, x4) ({ \
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; \
154 #define SI0(x0, x1, x2, x3, x4) ({ \
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; \
163 #define SI1(x0, x1, x2, x3, x4) ({ \
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; \
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; \
182 #define SI3(x0, x1, x2, x3, x4) ({ \
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; \
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; \
202 #define SI5(x0, x1, x2, x3, x4) ({ \
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; \
212 #define SI6(x0, x1, x2, x3, x4) ({ \
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; \
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; \
232 int __serpent_setkey(struct serpent_ctx
*ctx
, const u8
*key
,
235 u32
*k
= ctx
->expkey
;
237 u32 r0
, r1
, r2
, r3
, r4
;
240 /* Copy key, add padding */
242 for (i
= 0; i
< keylen
; ++i
)
244 if (i
< SERPENT_MAX_KEY_SIZE
)
246 while (i
< SERPENT_MAX_KEY_SIZE
)
249 /* Expand key using polynomial */
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]);
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);
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);
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);
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);
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);
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);
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);
437 EXPORT_SYMBOL_GPL(__serpent_setkey
);
439 int serpent_setkey(struct crypto_tfm
*tfm
, const u8
*key
, unsigned int keylen
)
441 return __serpent_setkey(crypto_tfm_ctx(tfm
), key
, keylen
);
443 EXPORT_SYMBOL_GPL(serpent_setkey
);
445 void __serpent_encrypt(struct serpent_ctx
*ctx
, u8
*dst
, const u8
*src
)
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
;
453 * Note: The conversions between u8* and u32* might cause trouble
454 * on architectures with stricter alignment rules than x86
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]);
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);
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
);
501 EXPORT_SYMBOL_GPL(__serpent_encrypt
);
503 static void serpent_encrypt(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
)
505 struct serpent_ctx
*ctx
= crypto_tfm_ctx(tfm
);
507 __serpent_encrypt(ctx
, dst
, src
);
510 void __serpent_decrypt(struct serpent_ctx
*ctx
, u8
*dst
, const u8
*src
)
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
;
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]);
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);
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
);
561 EXPORT_SYMBOL_GPL(__serpent_decrypt
);
563 static void serpent_decrypt(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
)
565 struct serpent_ctx
*ctx
= crypto_tfm_ctx(tfm
);
567 __serpent_decrypt(ctx
, dst
, src
);
570 static int tnepres_setkey(struct crypto_tfm
*tfm
, const u8
*key
,
573 u8 rev_key
[SERPENT_MAX_KEY_SIZE
];
576 for (i
= 0; i
< keylen
; ++i
)
577 rev_key
[keylen
- i
- 1] = key
[i
];
579 return serpent_setkey(tfm
, rev_key
, keylen
);
582 static void tnepres_encrypt(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
)
584 const u32
* const s
= (const u32
* const)src
;
585 u32
* const d
= (u32
* const)dst
;
589 rs
[0] = swab32(s
[3]);
590 rs
[1] = swab32(s
[2]);
591 rs
[2] = swab32(s
[1]);
592 rs
[3] = swab32(s
[0]);
594 serpent_encrypt(tfm
, (u8
*)rd
, (u8
*)rs
);
596 d
[0] = swab32(rd
[3]);
597 d
[1] = swab32(rd
[2]);
598 d
[2] = swab32(rd
[1]);
599 d
[3] = swab32(rd
[0]);
602 static void tnepres_decrypt(struct crypto_tfm
*tfm
, u8
*dst
, const u8
*src
)
604 const u32
* const s
= (const u32
* const)src
;
605 u32
* const d
= (u32
* const)dst
;
609 rs
[0] = swab32(s
[3]);
610 rs
[1] = swab32(s
[2]);
611 rs
[2] = swab32(s
[1]);
612 rs
[3] = swab32(s
[0]);
614 serpent_decrypt(tfm
, (u8
*)rd
, (u8
*)rs
);
616 d
[0] = swab32(rd
[3]);
617 d
[1] = swab32(rd
[2]);
618 d
[2] = swab32(rd
[1]);
619 d
[3] = swab32(rd
[0]);
622 static struct crypto_alg srp_algs
[2] = { {
623 .cra_name
= "serpent",
624 .cra_driver_name
= "serpent-generic",
626 .cra_flags
= CRYPTO_ALG_TYPE_CIPHER
,
627 .cra_blocksize
= SERPENT_BLOCK_SIZE
,
628 .cra_ctxsize
= sizeof(struct serpent_ctx
),
630 .cra_module
= THIS_MODULE
,
631 .cra_u
= { .cipher
= {
632 .cia_min_keysize
= SERPENT_MIN_KEY_SIZE
,
633 .cia_max_keysize
= SERPENT_MAX_KEY_SIZE
,
634 .cia_setkey
= serpent_setkey
,
635 .cia_encrypt
= serpent_encrypt
,
636 .cia_decrypt
= serpent_decrypt
} }
638 .cra_name
= "tnepres",
639 .cra_flags
= CRYPTO_ALG_TYPE_CIPHER
,
640 .cra_blocksize
= SERPENT_BLOCK_SIZE
,
641 .cra_ctxsize
= sizeof(struct serpent_ctx
),
643 .cra_module
= THIS_MODULE
,
644 .cra_u
= { .cipher
= {
645 .cia_min_keysize
= SERPENT_MIN_KEY_SIZE
,
646 .cia_max_keysize
= SERPENT_MAX_KEY_SIZE
,
647 .cia_setkey
= tnepres_setkey
,
648 .cia_encrypt
= tnepres_encrypt
,
649 .cia_decrypt
= tnepres_decrypt
} }
652 static int __init
serpent_mod_init(void)
654 return crypto_register_algs(srp_algs
, ARRAY_SIZE(srp_algs
));
657 static void __exit
serpent_mod_fini(void)
659 crypto_unregister_algs(srp_algs
, ARRAY_SIZE(srp_algs
));
662 module_init(serpent_mod_init
);
663 module_exit(serpent_mod_fini
);
665 MODULE_LICENSE("GPL");
666 MODULE_DESCRIPTION("Serpent and tnepres (kerneli compatible serpent reversed) Cipher Algorithm");
667 MODULE_AUTHOR("Dag Arne Osvik <osvik@ii.uib.no>");
668 MODULE_ALIAS_CRYPTO("tnepres");
669 MODULE_ALIAS_CRYPTO("serpent");