Mercurial > dropbear

comparison serpent.c @ 16:09ab3354aa21 libtomcrypt

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
propagate of e8bea23df30f9f46c647d06db3b223427b4e3604 and b0b6b4a8843b94d9f049cb5ffe0b1ae91ec1bf8b from branch 'au.asn.ucc.matt.ltc-orig' to 'au.asn.ucc.matt.ltc-db'
author Matt Johnston <matt@ucc.asn.au>
date Tue, 15 Jun 2004 14:27:14 +0000
parents d7da3b1e1540
children
comparison
equal deleted inserted replaced
15:6362d3854bb4 16:09ab3354aa21
1 #include "mycrypt.h"
2
3 #ifdef SERPENT
4
5 const struct _cipher_descriptor serpent_desc =
6 {
7 "serpent",
8 5,
9 16, 32, 16, 32,
10 &serpent_setup,
11 &serpent_ecb_encrypt,
12 &serpent_ecb_decrypt,
13 &serpent_test,
14 &serpent_keysize
15 };
16
17 /* These defines are derived from Brian Gladman's work. Contact him at [email protected]
18 *
19 * Available on the web at http://fp.gladman.plus.com/cryptography_technology/aes/index.htm
20 */
21 #define sb0(a,b,c,d,e,f,g,h) \
22 t1 = a ^ d; \
23 t2 = a & d; \
24 t3 = c ^ t1; \
25 t6 = b & t1; \
26 t4 = b ^ t3; \
27 t10 = ~t3; \
28 h = t2 ^ t4; \
29 t7 = a ^ t6; \
30 t14 = ~t7; \
31 t8 = c | t7; \
32 t11 = t3 ^ t7; \
33 g = t4 ^ t8; \
34 t12 = h & t11; \
35 f = t10 ^ t12; \
36 e = t12 ^ t14
37
38 /* 15 terms */
39
40 #define ib0(a,b,c,d,e,f,g,h) \
41 t1 = ~a; \
42 t2 = a ^ b; \
43 t3 = t1 | t2; \
44 t4 = d ^ t3; \
45 t7 = d & t2; \
46 t5 = c ^ t4; \
47 t8 = t1 ^ t7; \
48 g = t2 ^ t5; \
49 t11 = a & t4; \
50 t9 = g & t8; \
51 t14 = t5 ^ t8; \
52 f = t4 ^ t9; \
53 t12 = t5 | f; \
54 h = t11 ^ t12; \
55 e = h ^ t14
56
57 /* 14 terms! */
58
59 #define sb1(a,b,c,d,e,f,g,h) \
60 t1 = ~a; \
61 t2 = b ^ t1; \
62 t3 = a | t2; \
63 t4 = d | t2; \
64 t5 = c ^ t3; \
65 g = d ^ t5; \
66 t7 = b ^ t4; \
67 t8 = t2 ^ g; \
68 t9 = t5 & t7; \
69 h = t8 ^ t9; \
70 t11 = t5 ^ t7; \
71 f = h ^ t11; \
72 t13 = t8 & t11; \
73 e = t5 ^ t13
74
75 /* 17 terms */
76
77 #define ib1(a,b,c,d,e,f,g,h) \
78 t1 = a ^ d; \
79 t2 = a & b; \
80 t3 = b ^ c; \
81 t4 = a ^ t3; \
82 t5 = b | d; \
83 t7 = c | t1; \
84 h = t4 ^ t5; \
85 t8 = b ^ t7; \
86 t11 = ~t2; \
87 t9 = t4 & t8; \
88 f = t1 ^ t9; \
89 t13 = t9 ^ t11; \
90 t12 = h & f; \
91 g = t12 ^ t13; \
92 t15 = a & d; \
93 t16 = c ^ t13; \
94 e = t15 ^ t16
95
96 /* 16 terms */
97
98 #define sb2(a,b,c,d,e,f,g,h) \
99 t1 = ~a; \
100 t2 = b ^ d; \
101 t3 = c & t1; \
102 t13 = d | t1; \
103 e = t2 ^ t3; \
104 t5 = c ^ t1; \
105 t6 = c ^ e; \
106 t7 = b & t6; \
107 t10 = e | t5; \
108 h = t5 ^ t7; \
109 t9 = d | t7; \
110 t11 = t9 & t10; \
111 t14 = t2 ^ h; \
112 g = a ^ t11; \
113 t15 = g ^ t13; \
114 f = t14 ^ t15
115
116 /* 16 terms */
117
118 #define ib2(a,b,c,d,e,f,g,h) \
119 t1 = b ^ d; \
120 t2 = ~t1; \
121 t3 = a ^ c; \
122 t4 = c ^ t1; \
123 t7 = a | t2; \
124 t5 = b & t4; \
125 t8 = d ^ t7; \
126 t11 = ~t4; \
127 e = t3 ^ t5; \
128 t9 = t3 | t8; \
129 t14 = d & t11; \
130 h = t1 ^ t9; \
131 t12 = e | h; \
132 f = t11 ^ t12; \
133 t15 = t3 ^ t12; \
134 g = t14 ^ t15
135
136 /* 17 terms */
137
138 #define sb3(a,b,c,d,e,f,g,h) \
139 t1 = a ^ c; \
140 t2 = d ^ t1; \
141 t3 = a & t2; \
142 t4 = d ^ t3; \
143 t5 = b & t4; \
144 g = t2 ^ t5; \
145 t7 = a | g; \
146 t8 = b | d; \
147 t11 = a | d; \
148 t9 = t4 & t7; \
149 f = t8 ^ t9; \
150 t12 = b ^ t11; \
151 t13 = g ^ t9; \
152 t15 = t3 ^ t8; \
153 h = t12 ^ t13; \
154 t16 = c & t15; \
155 e = t12 ^ t16
156
157 /* 16 term solution that performs less well than 17 term one
158 in my environment (PPro/PII)
159
160 #define sb3(a,b,c,d,e,f,g,h) \
161 t1 = a ^ b; \
162 t2 = a & c; \
163 t3 = a | d; \
164 t4 = c ^ d; \
165 t5 = t1 & t3; \
166 t6 = t2 | t5; \
167 g = t4 ^ t6; \
168 t8 = b ^ t3; \
169 t9 = t6 ^ t8; \
170 t10 = t4 & t9; \
171 e = t1 ^ t10; \
172 t12 = g & e; \
173 f = t9 ^ t12; \
174 t14 = b | d; \
175 t15 = t4 ^ t12; \
176 h = t14 ^ t15
177 */
178
179 /* 17 terms */
180
181 #define ib3(a,b,c,d,e,f,g,h) \
182 t1 = b ^ c; \
183 t2 = b | c; \
184 t3 = a ^ c; \
185 t7 = a ^ d; \
186 t4 = t2 ^ t3; \
187 t5 = d | t4; \
188 t9 = t2 ^ t7; \
189 e = t1 ^ t5; \
190 t8 = t1 | t5; \
191 t11 = a & t4; \
192 g = t8 ^ t9; \
193 t12 = e | t9; \
194 f = t11 ^ t12; \
195 t14 = a & g; \
196 t15 = t2 ^ t14; \
197 t16 = e & t15; \
198 h = t4 ^ t16
199
200 /* 15 terms */
201
202 #define sb4(a,b,c,d,e,f,g,h) \
203 t1 = a ^ d; \
204 t2 = d & t1; \
205 t3 = c ^ t2; \
206 t4 = b | t3; \
207 h = t1 ^ t4; \
208 t6 = ~b; \
209 t7 = t1 | t6; \
210 e = t3 ^ t7; \
211 t9 = a & e; \
212 t10 = t1 ^ t6; \
213 t11 = t4 & t10; \
214 g = t9 ^ t11; \
215 t13 = a ^ t3; \
216 t14 = t10 & g; \
217 f = t13 ^ t14
218
219 /* 17 terms */
220
221 #define ib4(a,b,c,d,e,f,g,h) \
222 t1 = c ^ d; \
223 t2 = c | d; \
224 t3 = b ^ t2; \
225 t4 = a & t3; \
226 f = t1 ^ t4; \
227 t6 = a ^ d; \
228 t7 = b | d; \
229 t8 = t6 & t7; \
230 h = t3 ^ t8; \
231 t10 = ~a; \
232 t11 = c ^ h; \
233 t12 = t10 | t11;\
234 e = t3 ^ t12; \
235 t14 = c | t4; \
236 t15 = t7 ^ t14; \
237 t16 = h | t10; \
238 g = t15 ^ t16
239
240 /* 16 terms */
241
242 #define sb5(a,b,c,d,e,f,g,h) \
243 t1 = ~a; \
244 t2 = a ^ b; \
245 t3 = a ^ d; \
246 t4 = c ^ t1; \
247 t5 = t2 | t3; \
248 e = t4 ^ t5; \
249 t7 = d & e; \
250 t8 = t2 ^ e; \
251 t10 = t1 | e; \
252 f = t7 ^ t8; \
253 t11 = t2 | t7; \
254 t12 = t3 ^ t10; \
255 t14 = b ^ t7; \
256 g = t11 ^ t12; \
257 t15 = f & t12; \
258 h = t14 ^ t15
259
260 /* 16 terms */
261
262 #define ib5(a,b,c,d,e,f,g,h) \
263 t1 = ~c; \
264 t2 = b & t1; \
265 t3 = d ^ t2; \
266 t4 = a & t3; \
267 t5 = b ^ t1; \
268 h = t4 ^ t5; \
269 t7 = b | h; \
270 t8 = a & t7; \
271 f = t3 ^ t8; \
272 t10 = a | d; \
273 t11 = t1 ^ t7; \
274 e = t10 ^ t11; \
275 t13 = a ^ c; \
276 t14 = b & t10; \
277 t15 = t4 | t13; \
278 g = t14 ^ t15
279
280 /* 15 terms */
281
282 #define sb6(a,b,c,d,e,f,g,h) \
283 t1 = ~a; \
284 t2 = a ^ d; \
285 t3 = b ^ t2; \
286 t4 = t1 | t2; \
287 t5 = c ^ t4; \
288 f = b ^ t5; \
289 t13 = ~t5; \
290 t7 = t2 | f; \
291 t8 = d ^ t7; \
292 t9 = t5 & t8; \
293 g = t3 ^ t9; \
294 t11 = t5 ^ t8; \
295 e = g ^ t11; \
296 t14 = t3 & t11; \
297 h = t13 ^ t14
298
299 /* 15 terms */
300
301 #define ib6(a,b,c,d,e,f,g,h) \
302 t1 = ~a; \
303 t2 = a ^ b; \
304 t3 = c ^ t2; \
305 t4 = c | t1; \
306 t5 = d ^ t4; \
307 t13 = d & t1; \
308 f = t3 ^ t5; \
309 t7 = t3 & t5; \
310 t8 = t2 ^ t7; \
311 t9 = b | t8; \
312 h = t5 ^ t9; \
313 t11 = b | h; \
314 e = t8 ^ t11; \
315 t14 = t3 ^ t11; \
316 g = t13 ^ t14
317
318 /* 17 terms */
319
320 #define sb7(a,b,c,d,e,f,g,h) \
321 t1 = ~c; \
322 t2 = b ^ c; \
323 t3 = b | t1; \
324 t4 = d ^ t3; \
325 t5 = a & t4; \
326 t7 = a ^ d; \
327 h = t2 ^ t5; \
328 t8 = b ^ t5; \
329 t9 = t2 | t8; \
330 t11 = d & t3; \
331 f = t7 ^ t9; \
332 t12 = t5 ^ f; \
333 t15 = t1 | t4; \
334 t13 = h & t12; \
335 g = t11 ^ t13; \
336 t16 = t12 ^ g; \
337 e = t15 ^ t16
338
339 /* 17 terms */
340
341 #define ib7(a,b,c,d,e,f,g,h) \
342 t1 = a & b; \
343 t2 = a | b; \
344 t3 = c | t1; \
345 t4 = d & t2; \
346 h = t3 ^ t4; \
347 t6 = ~d; \
348 t7 = b ^ t4; \
349 t8 = h ^ t6; \
350 t11 = c ^ t7; \
351 t9 = t7 | t8; \
352 f = a ^ t9; \
353 t12 = d | f; \
354 e = t11 ^ t12; \
355 t14 = a & h; \
356 t15 = t3 ^ f; \
357 t16 = e ^ t14; \
358 g = t15 ^ t16
359
360 #define k_xor(r,a,b,c,d) \
361 a ^= skey->serpent.K[4 * (r) + 0]; \
362 b ^= skey->serpent.K[4 * (r) + 1]; \
363 c ^= skey->serpent.K[4 * (r) + 2]; \
364 d ^= skey->serpent.K[4 * (r) + 3]
365
366 #define k_set(r,a,b,c,d) \
367 a = lkey[4 * (r) + 8]; \
368 b = lkey[4 * (r) + 9]; \
369 c = lkey[4 * (r) + 10]; \
370 d = lkey[4 * (r) + 11]
371
372 #define k_get(r,a,b,c,d) \
373 skey->serpent.K[4 * (r) + 0] = a; \
374 skey->serpent.K[4 * (r) + 1] = b; \
375 skey->serpent.K[4 * (r) + 2] = c; \
376 skey->serpent.K[4 * (r) + 3] = d
377
378 /* the linear transformation and its inverse */
379
380 #define rot(a,b,c,d) \
381 a = ROL(a, 13); \
382 c = ROL(c, 3); \
383 d ^= c ^ (a << 3); \
384 b ^= a ^ c; \
385 d = ROL(d, 7); \
386 b = ROL(b, 1); \
387 a ^= b ^ d; \
388 c ^= d ^ (b << 7); \
389 a = ROL(a, 5); \
390 c = ROL(c, 22)
391
392 #define irot(a,b,c,d) \
393 c = ROR(c, 22); \
394 a = ROR(a, 5); \
395 c ^= d ^ (b << 7); \
396 a ^= b ^ d; \
397 d = ROR(d, 7); \
398 b = ROR(b, 1); \
399 d ^= c ^ (a << 3); \
400 b ^= a ^ c; \
401 c = ROR(c, 3); \
402 a = ROR(a, 13)
403
404 #ifdef CLEAN_STACK
405 static int _serpent_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
406 #else
407 int serpent_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
408 #endif
409 {
410 unsigned long lkey[140], t, a, b, c, d, e, f, g, h, x;
411 unsigned long t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;
412 unsigned char buf[32];
413
414 _ARGCHK(key != NULL);
415 _ARGCHK(skey != NULL);
416
417 /* check rounds */
418 if (num_rounds != 0 && num_rounds != 32) {
419 return CRYPT_INVALID_ROUNDS;
420 }
421
422 /* check keylen */
423 if (keylen < 16 || keylen > 32) {
424 return CRYPT_INVALID_KEYSIZE;
425 }
426
427 /* copy key and expand to 32bytes as required */
428 for (x = 0; x < (unsigned long)keylen; x++) {
429 buf[x] = key[x];
430 }
431
432 if (x < 32) {
433 buf[x++] = (unsigned char)0x01;
434 while (x < 32) {
435 buf[x++] = (unsigned char)0;
436 }
437 }
438
439 /* copy key into 32-bit words */
440 for (x = 0; x < 8; x++) {
441 LOAD32L(lkey[x], &buf[x*4]);
442 }
443
444 /* expand using the LFSR to 140 words */
445 for (x = 0; x < 132; x++) {
446 t = lkey[x] ^ lkey[x+3] ^ lkey[x+5] ^ lkey[x+7] ^ x ^ 0x9E3779B9UL;
447 lkey[x + 8] = ROL(t, 11);
448 }
449
450 /* perform the substituions */
451 for (x = 0; x < 32; ) {
452 k_set( x,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
453 k_set( x,a,b,c,d);sb2(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
454 k_set( x,a,b,c,d);sb1(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
455 k_set( x,a,b,c,d);sb0(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
456 k_set( x,a,b,c,d);sb7(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
457 k_set( x,a,b,c,d);sb6(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
458 k_set( x,a,b,c,d);sb5(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
459 k_set( x,a,b,c,d);sb4(a,b,c,d,e,f,g,h);k_get( x,e,f,g,h); ++x;
460 }
461 k_set(32,a,b,c,d);sb3(a,b,c,d,e,f,g,h);k_get(32,e,f,g,h);
462 return CRYPT_OK;
463 }
464
465 #ifdef CLEAN_STACK
466 int serpent_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
467 {
468 int x;
469 x = _serpent_setup(key, keylen, num_rounds, skey);
470 burn_stack(sizeof(unsigned long)*166 + sizeof(unsigned char)*32);
471 return x;
472 }
473 #endif
474
475 #ifdef CLEAN_STACK
476 static void _serpent_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
477 #else
478 void serpent_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
479 #endif
480 {
481 unsigned long a,b,c,d,e,f,g,h;
482 unsigned long t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;
483
484 _ARGCHK(pt != NULL);
485 _ARGCHK(ct != NULL);
486 _ARGCHK(skey != NULL);
487
488 LOAD32L(a, &pt[0]);LOAD32L(b, &pt[4]);LOAD32L(c, &pt[8]);LOAD32L(d, &pt[12]);
489 k_xor( 0,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
490 k_xor( 1,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
491 k_xor( 2,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
492 k_xor( 3,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
493 k_xor( 4,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
494 k_xor( 5,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
495 k_xor( 6,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
496 k_xor( 7,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d);
497 k_xor( 8,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
498 k_xor( 9,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
499 k_xor(10,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
500 k_xor(11,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
501 k_xor(12,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
502 k_xor(13,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
503 k_xor(14,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
504 k_xor(15,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d);
505 k_xor(16,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
506 k_xor(17,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
507 k_xor(18,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
508 k_xor(19,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
509 k_xor(20,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
510 k_xor(21,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
511 k_xor(22,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
512 k_xor(23,e,f,g,h); sb7(e,f,g,h,a,b,c,d); rot(a,b,c,d);
513 k_xor(24,a,b,c,d); sb0(a,b,c,d,e,f,g,h); rot(e,f,g,h);
514 k_xor(25,e,f,g,h); sb1(e,f,g,h,a,b,c,d); rot(a,b,c,d);
515 k_xor(26,a,b,c,d); sb2(a,b,c,d,e,f,g,h); rot(e,f,g,h);
516 k_xor(27,e,f,g,h); sb3(e,f,g,h,a,b,c,d); rot(a,b,c,d);
517 k_xor(28,a,b,c,d); sb4(a,b,c,d,e,f,g,h); rot(e,f,g,h);
518 k_xor(29,e,f,g,h); sb5(e,f,g,h,a,b,c,d); rot(a,b,c,d);
519 k_xor(30,a,b,c,d); sb6(a,b,c,d,e,f,g,h); rot(e,f,g,h);
520 k_xor(31,e,f,g,h); sb7(e,f,g,h,a,b,c,d); k_xor(32,a,b,c,d);
521 STORE32L(a, &ct[0]);STORE32L(b, &ct[4]);STORE32L(c, &ct[8]);STORE32L(d, &ct[12]);
522 }
523
524 #ifdef CLEAN_STACK
525 void serpent_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
526 {
527 _serpent_ecb_encrypt(pt, ct, skey);
528 burn_stack(sizeof(unsigned long)*24);
529 }
530 #endif
531
532 #ifdef CLEAN_STACK
533 static void _serpent_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
534 #else
535 void serpent_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
536 #endif
537 {
538 unsigned long a,b,c,d,e,f,g,h;
539 unsigned long t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16;
540
541 _ARGCHK(pt != NULL);
542 _ARGCHK(ct != NULL);
543 _ARGCHK(skey != NULL);
544
545 LOAD32L(a, &ct[0]);LOAD32L(b, &ct[4]);LOAD32L(c, &ct[8]);LOAD32L(d, &ct[12]);
546 k_xor(32,a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(31,e,f,g,h);
547 irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(30,a,b,c,d);
548 irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(29,e,f,g,h);
549 irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(28,a,b,c,d);
550 irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(27,e,f,g,h);
551 irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(26,a,b,c,d);
552 irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor(25,e,f,g,h);
553 irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor(24,a,b,c,d);
554 irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(23,e,f,g,h);
555 irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(22,a,b,c,d);
556 irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(21,e,f,g,h);
557 irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(20,a,b,c,d);
558 irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(19,e,f,g,h);
559 irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(18,a,b,c,d);
560 irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor(17,e,f,g,h);
561 irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor(16,a,b,c,d);
562 irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor(15,e,f,g,h);
563 irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor(14,a,b,c,d);
564 irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor(13,e,f,g,h);
565 irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor(12,a,b,c,d);
566 irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor(11,e,f,g,h);
567 irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor(10,a,b,c,d);
568 irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor( 9,e,f,g,h);
569 irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor( 8,a,b,c,d);
570 irot(a,b,c,d); ib7(a,b,c,d,e,f,g,h); k_xor( 7,e,f,g,h);
571 irot(e,f,g,h); ib6(e,f,g,h,a,b,c,d); k_xor( 6,a,b,c,d);
572 irot(a,b,c,d); ib5(a,b,c,d,e,f,g,h); k_xor( 5,e,f,g,h);
573 irot(e,f,g,h); ib4(e,f,g,h,a,b,c,d); k_xor( 4,a,b,c,d);
574 irot(a,b,c,d); ib3(a,b,c,d,e,f,g,h); k_xor( 3,e,f,g,h);
575 irot(e,f,g,h); ib2(e,f,g,h,a,b,c,d); k_xor( 2,a,b,c,d);
576 irot(a,b,c,d); ib1(a,b,c,d,e,f,g,h); k_xor( 1,e,f,g,h);
577 irot(e,f,g,h); ib0(e,f,g,h,a,b,c,d); k_xor( 0,a,b,c,d);
578 STORE32L(a, &pt[0]);STORE32L(b, &pt[4]);STORE32L(c, &pt[8]);STORE32L(d, &pt[12]);
579 }
580
581 #ifdef CLEAN_STACK
582 void serpent_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
583 {
584 _serpent_ecb_decrypt(ct, pt, skey);
585 burn_stack(sizeof(unsigned long)*24);
586 }
587 #endif
588
589 int serpent_test(void)
590 {
591 static const struct {
592 int keylen;
593 unsigned char key[32], pt[16], ct[16];
594 } tests[] = {
595 {
596 16,
597 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
598 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
599 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
600 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
601 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
602 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
603 { 0xdd, 0xd2, 0x6b, 0x98, 0xa5, 0xff, 0xd8, 0x2c,
604 0x05, 0x34, 0x5a, 0x9d, 0xad, 0xbf, 0xaf, 0x49 }
605 },
606 {
607 16,
608 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
609 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
610 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
611 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
612 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
613 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80 },
614 { 0x4a, 0xe9, 0xa2, 0x0b, 0x2b, 0x14, 0xa1, 0x02,
615 0x90, 0xcb, 0xb8, 0x20, 0xb7, 0xff, 0xb5, 0x10 }
616 },
617 {
618 24,
619 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
620 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
621 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
622 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
623 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
624 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08 },
625 { 0xe1, 0x1b, 0x01, 0x52, 0x4e, 0xa1, 0xf4, 0x65,
626 0xa2, 0xa2, 0x00, 0x43, 0xeb, 0x9f, 0x7e, 0x8a }
627 },
628 {
629 32,
630 { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
631 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
632 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
633 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
634 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
635 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
636 { 0xe0, 0x88, 0x5d, 0x44, 0x60, 0x37, 0x34, 0x69,
637 0xd1, 0xfa, 0x6c, 0x36, 0xa6, 0xe1, 0xc5, 0x2f }
638 },
639 {
640 32,
641 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
642 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
643 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
644 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
645 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
646 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
647 { 0x17, 0xc6, 0x25, 0x8e, 0x60, 0x09, 0xe2, 0x82,
648 0x66, 0x18, 0x69, 0xd5, 0x25, 0xf7, 0xd2, 0x04 }
649 },
650 {
651 32,
652 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
653 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
654 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
655 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
656 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00,
657 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
658 { 0x9f, 0xe1, 0x43, 0x25, 0x0d, 0x00, 0xe2, 0x56,
659 0x96, 0xb0, 0x1e, 0x0a, 0x2e, 0xd0, 0x5d, 0xb3 }
660 }
661 };
662
663 unsigned char buf[2][16];
664 int x, err;
665 symmetric_key key;
666
667 for (x = 0; x < (int)(sizeof(tests) / sizeof(tests[0])); x++) {
668 /* setup key */
669 if ((err = serpent_setup(tests[x].key, tests[x].keylen, 0, &key))!= CRYPT_OK) {
670 return err;
671 }
672
673 /* encrypt and decrypt */
674 serpent_ecb_encrypt(tests[x].pt, buf[0], &key);
675 serpent_ecb_decrypt(buf[0], buf[1], &key);
676
677 /* compare */
678 if (memcmp(buf[0], tests[x].ct, 16) != 0 || memcmp(buf[1], tests[x].pt, 16) != 0) {
679 return CRYPT_FAIL_TESTVECTOR;
680 }
681 }
682 return CRYPT_OK;
683 }
684
685 int serpent_keysize(int *desired_keysize)
686 {
687 _ARGCHK(desired_keysize != NULL);
688
689 if (*desired_keysize < 16)
690 return CRYPT_INVALID_KEYSIZE;
691 if (*desired_keysize > 32)
692 *desired_keysize = 32;
693 return CRYPT_OK;
694 }
695
696 #endif
697
698