|
380
|
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
|
|
2 * |
|
|
3 * LibTomCrypt is a library that provides various cryptographic |
|
|
4 * algorithms in a highly modular and flexible manner. |
|
|
5 * |
|
|
6 * The library is free for all purposes without any express |
|
|
7 * guarantee it works. |
|
|
8 * |
|
|
9 * Tom St Denis, [email protected], http://libtomcrypt.com |
|
|
10 */ |
|
|
11 |
|
|
12 #define DESC_DEF_ONLY |
|
|
13 #include "tomcrypt.h" |
|
|
14 |
|
|
15 #ifdef GMP_DESC |
|
|
16 |
|
|
17 #include <stdio.h> |
|
|
18 #include <gmp.h> |
|
|
19 |
|
|
20 static int init(void **a) |
|
|
21 { |
|
|
22 LTC_ARGCHK(a != NULL); |
|
|
23 |
|
|
24 *a = XCALLOC(1, sizeof(__mpz_struct)); |
|
|
25 if (*a == NULL) { |
|
|
26 return CRYPT_MEM; |
|
|
27 } |
|
|
28 mpz_init(((__mpz_struct *)*a)); |
|
|
29 return CRYPT_OK; |
|
|
30 } |
|
|
31 |
|
|
32 static void deinit(void *a) |
|
|
33 { |
|
|
34 LTC_ARGCHKVD(a != NULL); |
|
|
35 mpz_clear(a); |
|
|
36 XFREE(a); |
|
|
37 } |
|
|
38 |
|
|
39 static int neg(void *a, void *b) |
|
|
40 { |
|
|
41 LTC_ARGCHK(a != NULL); |
|
|
42 LTC_ARGCHK(b != NULL); |
|
|
43 mpz_neg(b, a); |
|
|
44 return CRYPT_OK; |
|
|
45 } |
|
|
46 |
|
|
47 static int copy(void *a, void *b) |
|
|
48 { |
|
|
49 LTC_ARGCHK(a != NULL); |
|
|
50 LTC_ARGCHK(b != NULL); |
|
|
51 mpz_set(b, a); |
|
|
52 return CRYPT_OK; |
|
|
53 } |
|
|
54 |
|
|
55 static int init_copy(void **a, void *b) |
|
|
56 { |
|
|
57 if (init(a) != CRYPT_OK) { |
|
|
58 return CRYPT_MEM; |
|
|
59 } |
|
|
60 return copy(b, *a); |
|
|
61 } |
|
|
62 |
|
|
63 /* ---- trivial ---- */ |
|
|
64 static int set_int(void *a, unsigned long b) |
|
|
65 { |
|
|
66 LTC_ARGCHK(a != NULL); |
|
|
67 mpz_set_ui(((__mpz_struct *)a), b); |
|
|
68 return CRYPT_OK; |
|
|
69 } |
|
|
70 |
|
|
71 static unsigned long get_int(void *a) |
|
|
72 { |
|
|
73 LTC_ARGCHK(a != NULL); |
|
|
74 return mpz_get_ui(a); |
|
|
75 } |
|
|
76 |
|
|
77 static unsigned long get_digit(void *a, int n) |
|
|
78 { |
|
|
79 LTC_ARGCHK(a != NULL); |
|
|
80 return mpz_getlimbn(a, n); |
|
|
81 } |
|
|
82 |
|
|
83 static int get_digit_count(void *a) |
|
|
84 { |
|
|
85 LTC_ARGCHK(a != NULL); |
|
|
86 return mpz_size(a); |
|
|
87 } |
|
|
88 |
|
|
89 static int compare(void *a, void *b) |
|
|
90 { |
|
|
91 int ret; |
|
|
92 LTC_ARGCHK(a != NULL); |
|
|
93 LTC_ARGCHK(b != NULL); |
|
|
94 ret = mpz_cmp(a, b); |
|
|
95 if (ret < 0) { |
|
|
96 return LTC_MP_LT; |
|
|
97 } else if (ret > 0) { |
|
|
98 return LTC_MP_GT; |
|
|
99 } else { |
|
|
100 return LTC_MP_EQ; |
|
|
101 } |
|
|
102 } |
|
|
103 |
|
|
104 static int compare_d(void *a, unsigned long b) |
|
|
105 { |
|
|
106 int ret; |
|
|
107 LTC_ARGCHK(a != NULL); |
|
|
108 ret = mpz_cmp_ui(((__mpz_struct *)a), b); |
|
|
109 if (ret < 0) { |
|
|
110 return LTC_MP_LT; |
|
|
111 } else if (ret > 0) { |
|
|
112 return LTC_MP_GT; |
|
|
113 } else { |
|
|
114 return LTC_MP_EQ; |
|
|
115 } |
|
|
116 } |
|
|
117 |
|
|
118 static int count_bits(void *a) |
|
|
119 { |
|
|
120 LTC_ARGCHK(a != NULL); |
|
|
121 return mpz_sizeinbase(a, 2); |
|
|
122 } |
|
|
123 |
|
|
124 static int count_lsb_bits(void *a) |
|
|
125 { |
|
|
126 LTC_ARGCHK(a != NULL); |
|
|
127 return mpz_scan1(a, 0); |
|
|
128 } |
|
|
129 |
|
|
130 |
|
|
131 static int twoexpt(void *a, int n) |
|
|
132 { |
|
|
133 LTC_ARGCHK(a != NULL); |
|
|
134 mpz_set_ui(a, 0); |
|
|
135 mpz_setbit(a, n); |
|
|
136 return CRYPT_OK; |
|
|
137 } |
|
|
138 |
|
|
139 /* ---- conversions ---- */ |
|
|
140 |
|
|
141 /* read ascii string */ |
|
|
142 static int read_radix(void *a, const char *b, int radix) |
|
|
143 { |
|
|
144 LTC_ARGCHK(a != NULL); |
|
|
145 LTC_ARGCHK(b != NULL); |
|
|
146 mpz_set_str(a, b, radix); |
|
|
147 return CRYPT_OK; |
|
|
148 } |
|
|
149 |
|
|
150 /* write one */ |
|
|
151 static int write_radix(void *a, char *b, int radix) |
|
|
152 { |
|
|
153 LTC_ARGCHK(a != NULL); |
|
|
154 LTC_ARGCHK(b != NULL); |
|
|
155 mpz_get_str(b, radix, a); |
|
|
156 return CRYPT_OK; |
|
|
157 } |
|
|
158 |
|
|
159 /* get size as unsigned char string */ |
|
|
160 static unsigned long unsigned_size(void *a) |
|
|
161 { |
|
|
162 unsigned long t; |
|
|
163 LTC_ARGCHK(a != NULL); |
|
|
164 t = mpz_sizeinbase(a, 2); |
|
|
165 if (mpz_cmp_ui(((__mpz_struct *)a), 0) == 0) return 0; |
|
|
166 return (t>>3) + ((t&7)?1:0); |
|
|
167 } |
|
|
168 |
|
|
169 /* store */ |
|
|
170 static int unsigned_write(void *a, unsigned char *b) |
|
|
171 { |
|
|
172 LTC_ARGCHK(a != NULL); |
|
|
173 LTC_ARGCHK(b != NULL); |
|
|
174 mpz_export(b, NULL, 1, 1, 1, 0, ((__mpz_struct*)a)); |
|
|
175 return CRYPT_OK; |
|
|
176 } |
|
|
177 |
|
|
178 /* read */ |
|
|
179 static int unsigned_read(void *a, unsigned char *b, unsigned long len) |
|
|
180 { |
|
|
181 LTC_ARGCHK(a != NULL); |
|
|
182 LTC_ARGCHK(b != NULL); |
|
|
183 mpz_import(a, len, 1, 1, 1, 0, b); |
|
|
184 return CRYPT_OK; |
|
|
185 } |
|
|
186 |
|
|
187 /* add */ |
|
|
188 static int add(void *a, void *b, void *c) |
|
|
189 { |
|
|
190 LTC_ARGCHK(a != NULL); |
|
|
191 LTC_ARGCHK(b != NULL); |
|
|
192 LTC_ARGCHK(c != NULL); |
|
|
193 mpz_add(c, a, b); |
|
|
194 return CRYPT_OK; |
|
|
195 } |
|
|
196 |
|
|
197 static int addi(void *a, unsigned long b, void *c) |
|
|
198 { |
|
|
199 LTC_ARGCHK(a != NULL); |
|
|
200 LTC_ARGCHK(c != NULL); |
|
|
201 mpz_add_ui(c, a, b); |
|
|
202 return CRYPT_OK; |
|
|
203 } |
|
|
204 |
|
|
205 /* sub */ |
|
|
206 static int sub(void *a, void *b, void *c) |
|
|
207 { |
|
|
208 LTC_ARGCHK(a != NULL); |
|
|
209 LTC_ARGCHK(b != NULL); |
|
|
210 LTC_ARGCHK(c != NULL); |
|
|
211 mpz_sub(c, a, b); |
|
|
212 return CRYPT_OK; |
|
|
213 } |
|
|
214 |
|
|
215 static int subi(void *a, unsigned long b, void *c) |
|
|
216 { |
|
|
217 LTC_ARGCHK(a != NULL); |
|
|
218 LTC_ARGCHK(c != NULL); |
|
|
219 mpz_sub_ui(c, a, b); |
|
|
220 return CRYPT_OK; |
|
|
221 } |
|
|
222 |
|
|
223 /* mul */ |
|
|
224 static int mul(void *a, void *b, void *c) |
|
|
225 { |
|
|
226 LTC_ARGCHK(a != NULL); |
|
|
227 LTC_ARGCHK(b != NULL); |
|
|
228 LTC_ARGCHK(c != NULL); |
|
|
229 mpz_mul(c, a, b); |
|
|
230 return CRYPT_OK; |
|
|
231 } |
|
|
232 |
|
|
233 static int muli(void *a, unsigned long b, void *c) |
|
|
234 { |
|
|
235 LTC_ARGCHK(a != NULL); |
|
|
236 LTC_ARGCHK(c != NULL); |
|
|
237 mpz_mul_ui(c, a, b); |
|
|
238 return CRYPT_OK; |
|
|
239 } |
|
|
240 |
|
|
241 /* sqr */ |
|
|
242 static int sqr(void *a, void *b) |
|
|
243 { |
|
|
244 LTC_ARGCHK(a != NULL); |
|
|
245 LTC_ARGCHK(b != NULL); |
|
|
246 mpz_mul(b, a, a); |
|
|
247 return CRYPT_OK; |
|
|
248 } |
|
|
249 |
|
|
250 /* div */ |
|
|
251 static int divide(void *a, void *b, void *c, void *d) |
|
|
252 { |
|
|
253 mpz_t tmp; |
|
|
254 LTC_ARGCHK(a != NULL); |
|
|
255 LTC_ARGCHK(b != NULL); |
|
|
256 if (c != NULL) { |
|
|
257 mpz_init(tmp); |
|
|
258 mpz_divexact(tmp, a, b); |
|
|
259 } |
|
|
260 if (d != NULL) { |
|
|
261 mpz_mod(d, a, b); |
|
|
262 } |
|
|
263 if (c != NULL) { |
|
|
264 mpz_set(c, tmp); |
|
|
265 mpz_clear(tmp); |
|
|
266 } |
|
|
267 return CRYPT_OK; |
|
|
268 } |
|
|
269 |
|
|
270 static int div_2(void *a, void *b) |
|
|
271 { |
|
|
272 LTC_ARGCHK(a != NULL); |
|
|
273 LTC_ARGCHK(b != NULL); |
|
|
274 mpz_divexact_ui(b, a, 2); |
|
|
275 return CRYPT_OK; |
|
|
276 } |
|
|
277 |
|
|
278 /* modi */ |
|
|
279 static int modi(void *a, unsigned long b, unsigned long *c) |
|
|
280 { |
|
|
281 LTC_ARGCHK(a != NULL); |
|
|
282 LTC_ARGCHK(c != NULL); |
|
|
283 |
|
|
284 *c = mpz_fdiv_ui(a, b); |
|
|
285 return CRYPT_OK; |
|
|
286 } |
|
|
287 |
|
|
288 /* gcd */ |
|
|
289 static int gcd(void *a, void *b, void *c) |
|
|
290 { |
|
|
291 LTC_ARGCHK(a != NULL); |
|
|
292 LTC_ARGCHK(b != NULL); |
|
|
293 LTC_ARGCHK(c != NULL); |
|
|
294 mpz_gcd(c, a, b); |
|
|
295 return CRYPT_OK; |
|
|
296 } |
|
|
297 |
|
|
298 /* lcm */ |
|
|
299 static int lcm(void *a, void *b, void *c) |
|
|
300 { |
|
|
301 LTC_ARGCHK(a != NULL); |
|
|
302 LTC_ARGCHK(b != NULL); |
|
|
303 LTC_ARGCHK(c != NULL); |
|
|
304 mpz_lcm(c, a, b); |
|
|
305 return CRYPT_OK; |
|
|
306 } |
|
|
307 |
|
|
308 static int mulmod(void *a, void *b, void *c, void *d) |
|
|
309 { |
|
|
310 LTC_ARGCHK(a != NULL); |
|
|
311 LTC_ARGCHK(b != NULL); |
|
|
312 LTC_ARGCHK(c != NULL); |
|
|
313 LTC_ARGCHK(d != NULL); |
|
|
314 mpz_mul(d, a, b); |
|
|
315 mpz_mod(d, d, c); |
|
|
316 return CRYPT_OK; |
|
|
317 } |
|
|
318 |
|
|
319 static int sqrmod(void *a, void *b, void *c) |
|
|
320 { |
|
|
321 LTC_ARGCHK(a != NULL); |
|
|
322 LTC_ARGCHK(b != NULL); |
|
|
323 LTC_ARGCHK(c != NULL); |
|
|
324 mpz_mul(c, a, a); |
|
|
325 mpz_mod(c, c, b); |
|
|
326 return CRYPT_OK; |
|
|
327 } |
|
|
328 |
|
|
329 /* invmod */ |
|
|
330 static int invmod(void *a, void *b, void *c) |
|
|
331 { |
|
|
332 LTC_ARGCHK(a != NULL); |
|
|
333 LTC_ARGCHK(b != NULL); |
|
|
334 LTC_ARGCHK(c != NULL); |
|
|
335 mpz_invert(c, a, b); |
|
|
336 return CRYPT_OK; |
|
|
337 } |
|
|
338 |
|
|
339 /* setup */ |
|
|
340 static int montgomery_setup(void *a, void **b) |
|
|
341 { |
|
|
342 LTC_ARGCHK(a != NULL); |
|
|
343 LTC_ARGCHK(b != NULL); |
|
|
344 *b = (void *)1; |
|
|
345 return CRYPT_OK; |
|
|
346 } |
|
|
347 |
|
|
348 /* get normalization value */ |
|
|
349 static int montgomery_normalization(void *a, void *b) |
|
|
350 { |
|
|
351 LTC_ARGCHK(a != NULL); |
|
|
352 LTC_ARGCHK(b != NULL); |
|
|
353 mpz_set_ui(a, 1); |
|
|
354 return CRYPT_OK; |
|
|
355 } |
|
|
356 |
|
|
357 /* reduce */ |
|
|
358 static int montgomery_reduce(void *a, void *b, void *c) |
|
|
359 { |
|
|
360 LTC_ARGCHK(a != NULL); |
|
|
361 LTC_ARGCHK(b != NULL); |
|
|
362 LTC_ARGCHK(c != NULL); |
|
|
363 mpz_mod(a, a, b); |
|
|
364 return CRYPT_OK; |
|
|
365 } |
|
|
366 |
|
|
367 /* clean up */ |
|
|
368 static void montgomery_deinit(void *a) |
|
|
369 { |
|
|
370 } |
|
|
371 |
|
|
372 static int exptmod(void *a, void *b, void *c, void *d) |
|
|
373 { |
|
|
374 LTC_ARGCHK(a != NULL); |
|
|
375 LTC_ARGCHK(b != NULL); |
|
|
376 LTC_ARGCHK(c != NULL); |
|
|
377 LTC_ARGCHK(d != NULL); |
|
|
378 mpz_powm(d, a, b, c); |
|
|
379 return CRYPT_OK; |
|
|
380 } |
|
|
381 |
|
|
382 static int isprime(void *a, int *b) |
|
|
383 { |
|
|
384 LTC_ARGCHK(a != NULL); |
|
|
385 LTC_ARGCHK(b != NULL); |
|
|
386 *b = mpz_probab_prime_p(a, 8) > 0 ? LTC_MP_YES : LTC_MP_NO; |
|
|
387 return CRYPT_OK; |
|
|
388 } |
|
|
389 |
|
|
390 const ltc_math_descriptor gmp_desc = { |
|
|
391 "GNU MP", |
|
|
392 sizeof(mp_limb_t) * CHAR_BIT - GMP_NAIL_BITS, |
|
|
393 |
|
|
394 &init, |
|
|
395 &init_copy, |
|
|
396 &deinit, |
|
|
397 |
|
|
398 &neg, |
|
|
399 ©, |
|
|
400 |
|
|
401 &set_int, |
|
|
402 &get_int, |
|
|
403 &get_digit, |
|
|
404 &get_digit_count, |
|
|
405 &compare, |
|
|
406 &compare_d, |
|
|
407 &count_bits, |
|
|
408 &count_lsb_bits, |
|
|
409 &twoexpt, |
|
|
410 |
|
|
411 &read_radix, |
|
|
412 &write_radix, |
|
|
413 &unsigned_size, |
|
|
414 &unsigned_write, |
|
|
415 &unsigned_read, |
|
|
416 |
|
|
417 &add, |
|
|
418 &addi, |
|
|
419 &sub, |
|
|
420 &subi, |
|
|
421 &mul, |
|
|
422 &muli, |
|
|
423 &sqr, |
|
|
424 ÷, |
|
|
425 &div_2, |
|
|
426 &modi, |
|
|
427 &gcd, |
|
|
428 &lcm, |
|
|
429 |
|
|
430 &mulmod, |
|
|
431 &sqrmod, |
|
|
432 &invmod, |
|
|
433 |
|
|
434 &montgomery_setup, |
|
|
435 &montgomery_normalization, |
|
|
436 &montgomery_reduce, |
|
|
437 &montgomery_deinit, |
|
|
438 |
|
|
439 &exptmod, |
|
|
440 &isprime, |
|
|
441 |
|
|
442 #ifdef MECC |
|
|
443 #ifdef MECC_FP |
|
|
444 <c_ecc_fp_mulmod, |
|
|
445 #else |
|
|
446 <c_ecc_mulmod, |
|
|
447 #endif /* MECC_FP */ |
|
|
448 <c_ecc_projective_add_point, |
|
|
449 <c_ecc_projective_dbl_point, |
|
|
450 <c_ecc_map, |
|
|
451 #ifdef LTC_ECC_SHAMIR |
|
|
452 #ifdef MECC_FP |
|
|
453 <c_ecc_fp_mul2add, |
|
|
454 #else |
|
|
455 <c_ecc_mul2add, |
|
|
456 #endif /* MECC_FP */ |
|
|
457 #else |
|
|
458 NULL, |
|
|
459 #endif /* LTC_ECC_SHAMIR */ |
|
|
460 #else |
|
|
461 NULL, NULL, NULL, NULL, NULL |
|
|
462 #endif /* MECC */ |
|
|
463 |
|
|
464 #ifdef MRSA |
|
|
465 &rsa_make_key, |
|
|
466 &rsa_exptmod, |
|
|
467 #else |
|
|
468 NULL, NULL |
|
|
469 #endif |
|
|
470 |
|
|
471 }; |
|
|
472 |
|
|
473 |
|
|
474 #endif |
|
|
475 |
|
|
476 /* $Source: /cvs/libtom/libtomcrypt/src/math/gmp_desc.c,v $ */ |
|
|
477 /* $Revision: 1.14 $ */ |
|
|
478 /* $Date: 2006/12/03 00:39:56 $ */ |
