Mercurial > dropbear

comparison libtomcrypt/src/math/gmp_desc.c @ 382:0cbe8f6dbf9e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f) to branch 'au.asn.ucc.matt.dropbear' (head 02c413252c90e9de8e03d91e9939dde3029f5c0a)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 02:41:05 +0000
parents
children f849a5ca2efc
comparison
equal deleted inserted replaced
379:b66a00272a90 382:0cbe8f6dbf9e
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 &copy,
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 &divide,
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 &ltc_ecc_fp_mulmod,
445 #else
446 &ltc_ecc_mulmod,
447 #endif /* MECC_FP */
448 &ltc_ecc_projective_add_point,
449 &ltc_ecc_projective_dbl_point,
450 &ltc_ecc_map,
451 #ifdef LTC_ECC_SHAMIR
452 #ifdef MECC_FP
453 &ltc_ecc_fp_mul2add,
454 #else
455 &ltc_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 $ */