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).
56 #include <openssl/err.h>
61 /* functions for EC_GROUP objects */
63 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth)
69 ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER);
72 if (meth->group_init == 0)
74 ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
78 ret = OPENSSL_malloc(sizeof *ret);
81 ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
87 if (!meth->group_init(ret))
97 int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
99 if (group->meth->group_set_curve_GFp == 0)
101 ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
105 return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
109 void EC_GROUP_free(EC_GROUP *group)
111 if (group->meth->group_finish != 0)
112 group->meth->group_finish(group);
117 void EC_GROUP_clear_free(EC_GROUP *group)
119 if (group->meth->group_clear_finish != 0)
120 group->meth->group_clear_finish(group);
121 else if (group->meth != NULL && group->meth->group_finish != 0)
122 group->meth->group_finish(group);
127 int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src)
129 if (dest->meth->group_copy == 0)
131 ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
134 if (dest->meth != src->meth)
136 ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
140 return dest->meth->group_copy(dest, src);
144 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor)
146 if (group->meth->group_set_generator == 0)
148 ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
151 return group->meth->group_set_generator(group, generator, order, cofactor);
155 /* TODO: 'get' functions for EC_GROUPs */
159 /* functions for EC_POINT objects */
161 EC_POINT *EC_POINT_new(const EC_GROUP *group)
167 ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
170 if (group->meth->point_init == 0)
172 ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
176 ret = OPENSSL_malloc(sizeof *ret);
179 ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
183 ret->meth = group->meth;
185 if (!ret->meth->point_init(ret))
195 void EC_POINT_free(EC_POINT *point)
197 if (point->meth->point_finish != 0)
198 point->meth->point_finish(point);
203 void EC_POINT_clear_free(EC_POINT *point)
205 if (point->meth->point_clear_finish != 0)
206 point->meth->point_clear_finish(point);
207 else if (point->meth != NULL && point->meth->point_finish != 0)
208 point->meth->point_finish(point);
213 int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src)
215 if (dest->meth->point_copy == 0)
217 ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
220 if (dest->meth != src->meth)
222 ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
226 return dest->meth->point_copy(dest, src);
230 /* TODO: 'set' and 'get' functions for EC_POINTs */
233 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
234 unsigned char *buf, size_t len, BN_CTX *ctx)
236 if (group->meth->point2oct == 0)
238 ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
241 if (group->meth != point->meth)
243 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
246 return group->meth->point2oct(group, point, form, buf, len, ctx);
250 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
251 const unsigned char *buf, size_t len, BN_CTX *ctx)
253 if (group->meth->oct2point == 0)
255 ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
258 if (group->meth != point->meth)
260 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
263 return group->meth->oct2point(group, point, buf, len, ctx);
267 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
269 if (group->meth->add == 0)
271 ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
274 if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth))
276 ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
279 return group->meth->add(group, r, a, b, ctx);
283 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx)
285 if (group->meth->dbl == 0)
287 ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
290 if ((group->meth != r->meth) || (r->meth != a->meth))
292 ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
295 return group->meth->dbl(group, r, a, ctx);
299 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
301 if (group->meth->is_at_infinity == 0)
303 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
306 if (group->meth != point->meth)
308 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
311 return group->meth->is_at_infinity(group, point);
315 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx)
317 if (group->meth->is_on_curve == 0)
319 ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
322 if (group->meth != point->meth)
324 ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
327 return group->meth->is_on_curve(group, point, ctx);
331 int EC_POINT_make_affine(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx)
333 if (group->meth->make_affine == 0)
335 ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
338 if (group->meth != point->meth)
340 ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
343 return group->meth->make_affine(group, point, ctx);