1 /* crypto/ec/ec_lib.c */
2 /* ====================================================================
3 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * openssl-core@openssl.org.
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
58 #include <openssl/err.h>
59 #include <openssl/opensslv.h>
63 static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
66 /* functions for EC_GROUP objects */
68 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth)
74 ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER);
77 if (meth->group_init == 0)
79 ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
83 ret = OPENSSL_malloc(sizeof *ret);
86 ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
92 ret->extra_data = NULL;
93 ret->extra_data_dup_func = 0;
94 ret->extra_data_free_func = 0;
95 ret->extra_data_clear_free_func = 0;
97 if (!meth->group_init(ret))
107 void EC_GROUP_free(EC_GROUP *group)
109 if (group->meth->group_finish != 0)
110 group->meth->group_finish(group);
112 EC_GROUP_free_extra_data(group);
118 void EC_GROUP_clear_free(EC_GROUP *group)
120 if (group->meth->group_clear_finish != 0)
121 group->meth->group_clear_finish(group);
122 else if (group->meth != NULL && group->meth->group_finish != 0)
123 group->meth->group_finish(group);
125 EC_GROUP_clear_free_extra_data(group);
127 memset(group, 0, sizeof *group);
132 int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src)
134 if (dest->meth->group_copy == 0)
136 ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
139 if (dest->meth != src->meth)
141 ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
147 EC_GROUP_clear_free_extra_data(dest);
148 if (src->extra_data_dup_func)
150 if (src->extra_data != NULL)
152 dest->extra_data = src->extra_data_dup_func(src->extra_data);
153 if (dest->extra_data == NULL)
157 dest->extra_data_dup_func = src->extra_data_dup_func;
158 dest->extra_data_free_func = src->extra_data_free_func;
159 dest->extra_data_clear_free_func = src->extra_data_clear_free_func;
162 return dest->meth->group_copy(dest, src);
166 int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
168 if (group->meth->group_set_curve_GFp == 0)
170 ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
173 return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
177 int EC_GROUP_get_curve_GFp(EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx)
179 if (group->meth->group_get_curve_GFp == 0)
181 ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
184 return group->meth->group_get_curve_GFp(group, p, a, b, ctx);
188 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor)
190 if (group->meth->group_set_generator == 0)
192 ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
195 return group->meth->group_set_generator(group, generator, order, cofactor);
199 /* this has 'package' visibility */
200 int EC_GROUP_set_extra_data(EC_GROUP *group, void *extra_data, void *(*extra_data_dup_func)(void *),
201 void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
203 if ((group->extra_data != NULL)
204 || (group->extra_data_dup_func != 0)
205 || (group->extra_data_free_func != 0)
206 || (group->extra_data_clear_free_func != 0))
208 ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL);
212 group->extra_data = extra_data;
213 group->extra_data_dup_func = extra_data_dup_func;
214 group->extra_data_free_func = extra_data_free_func;
215 group->extra_data_clear_free_func = extra_data_clear_free_func;
220 /* this has 'package' visibility */
221 void *EC_GROUP_get_extra_data(EC_GROUP *group, void *(*extra_data_dup_func)(void *),
222 void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
224 if ((group->extra_data_dup_func != extra_data_dup_func)
225 || (group->extra_data_free_func != extra_data_free_func)
226 || (group->extra_data_clear_free_func != extra_data_clear_free_func))
228 ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA);
232 return group->extra_data;
236 /* this has 'package' visibility */
237 void EC_GROUP_free_extra_data(EC_GROUP *group)
239 if (group->extra_data_free_func)
240 group->extra_data_free_func(group->extra_data);
241 group->extra_data = NULL;
242 group->extra_data_dup_func = 0;
243 group->extra_data_free_func = 0;
244 group->extra_data_clear_free_func = 0;
248 /* this has 'package' visibility */
249 void EC_GROUP_clear_free_extra_data(EC_GROUP *group)
251 if (group->extra_data_clear_free_func)
252 group->extra_data_clear_free_func(group->extra_data);
253 else if (group->extra_data_free_func)
254 group->extra_data_free_func(group->extra_data);
255 group->extra_data = NULL;
256 group->extra_data_dup_func = 0;
257 group->extra_data_free_func = 0;
258 group->extra_data_clear_free_func = 0;
263 /* functions for EC_POINT objects */
265 EC_POINT *EC_POINT_new(const EC_GROUP *group)
271 ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
274 if (group->meth->point_init == 0)
276 ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
280 ret = OPENSSL_malloc(sizeof *ret);
283 ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
287 ret->meth = group->meth;
289 if (!ret->meth->point_init(ret))
299 void EC_POINT_free(EC_POINT *point)
301 if (point->meth->point_finish != 0)
302 point->meth->point_finish(point);
307 void EC_POINT_clear_free(EC_POINT *point)
309 if (point->meth->point_clear_finish != 0)
310 point->meth->point_clear_finish(point);
311 else if (point->meth != NULL && point->meth->point_finish != 0)
312 point->meth->point_finish(point);
313 memset(point, 0, sizeof *point);
318 int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src)
320 if (dest->meth->point_copy == 0)
322 ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
325 if (dest->meth != src->meth)
327 ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
332 return dest->meth->point_copy(dest, src);
336 int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point)
338 if (group->meth->point_set_to_infinity == 0)
340 ECerr(EC_F_EC_POINT_SET_TO_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
343 if (group->meth != point->meth)
345 ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
348 return group->meth->point_set_to_infinity(group, point);
352 int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
353 const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx)
355 if (group->meth->point_set_Jprojective_coordinates_GFp == 0)
357 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
360 if (group->meth != point->meth)
362 ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
365 return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx);
369 int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
370 BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx)
372 if (group->meth->point_get_Jprojective_coordinates_GFp == 0)
374 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
377 if (group->meth != point->meth)
379 ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
382 return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx);
386 int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
387 const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
389 if (group->meth->point_set_affine_coordinates_GFp == 0)
391 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
394 if (group->meth != point->meth)
396 ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
399 return group->meth->point_set_affine_coordinates_GFp(group, point, x, y, ctx);
403 int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
404 BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
406 if (group->meth->point_get_affine_coordinates_GFp == 0)
408 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
411 if (group->meth != point->meth)
413 ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
416 return group->meth->point_get_affine_coordinates_GFp(group, point, x, y, ctx);
420 int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
421 const BIGNUM *x, int y_bit, BN_CTX *ctx)
423 if (group->meth->point_set_compressed_coordinates_GFp == 0)
425 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
428 if (group->meth != point->meth)
430 ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
433 return group->meth->point_set_compressed_coordinates_GFp(group, point, x, y_bit, ctx);
437 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
438 unsigned char *buf, size_t len, BN_CTX *ctx)
440 if (group->meth->point2oct == 0)
442 ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
445 if (group->meth != point->meth)
447 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
450 return group->meth->point2oct(group, point, form, buf, len, ctx);
454 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
455 const unsigned char *buf, size_t len, BN_CTX *ctx)
457 if (group->meth->oct2point == 0)
459 ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
462 if (group->meth != point->meth)
464 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
467 return group->meth->oct2point(group, point, buf, len, ctx);
471 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
473 if (group->meth->add == 0)
475 ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
478 if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth))
480 ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
483 return group->meth->add(group, r, a, b, ctx);
487 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx)
489 if (group->meth->dbl == 0)
491 ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
494 if ((group->meth != r->meth) || (r->meth != a->meth))
496 ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
499 return group->meth->dbl(group, r, a, ctx);
503 int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx)
505 if (group->meth->dbl == 0)
507 ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
510 if (group->meth != a->meth)
512 ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
515 return group->meth->invert(group, a, ctx);
519 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
521 if (group->meth->is_at_infinity == 0)
523 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
526 if (group->meth != point->meth)
528 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
531 return group->meth->is_at_infinity(group, point);
535 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx)
537 if (group->meth->is_on_curve == 0)
539 ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
542 if (group->meth != point->meth)
544 ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
547 return group->meth->is_on_curve(group, point, ctx);
551 int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
553 if (group->meth->point_cmp == 0)
555 ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
558 if ((group->meth != a->meth) || (a->meth != b->meth))
560 ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS);
563 return group->meth->point_cmp(group, a, b, ctx);
567 int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx)
569 if (group->meth->make_affine == 0)
571 ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
574 if (group->meth != point->meth)
576 ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
579 return group->meth->make_affine(group, point, ctx);