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>
63 /* functions for EC_GROUP objects */
65 EC_GROUP *EC_GROUP_new(const EC_METHOD *meth)
71 ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER);
74 if (meth->group_init == 0)
76 ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
80 ret = OPENSSL_malloc(sizeof *ret);
83 ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE);
89 if (!meth->group_init(ret))
99 int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
101 if (group->meth->group_set_curve_GFp == 0)
103 ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
107 return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
111 void EC_GROUP_free(EC_GROUP *group)
113 if (group->meth->group_finish != 0)
114 group->meth->group_finish(group);
119 void EC_GROUP_clear_free(EC_GROUP *group)
121 if (group->meth->group_clear_finish != 0)
122 group->meth->group_clear_finish(group);
123 else if (group->meth != NULL && group->meth->group_finish != 0)
124 group->meth->group_finish(group);
125 memset(group, 0, sizeof *group);
130 int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src)
132 if (dest->meth->group_copy == 0)
134 ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
137 if (dest->meth != src->meth)
139 ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS);
143 return dest->meth->group_copy(dest, src);
147 int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor)
149 if (group->meth->group_set_generator == 0)
151 ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
154 return group->meth->group_set_generator(group, generator, order, cofactor);
158 /* TODO: 'get' functions for EC_GROUPs */
162 /* functions for EC_POINT objects */
164 EC_POINT *EC_POINT_new(const EC_GROUP *group)
170 ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER);
173 if (group->meth->point_init == 0)
175 ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
179 ret = OPENSSL_malloc(sizeof *ret);
182 ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE);
186 ret->meth = group->meth;
188 if (!ret->meth->point_init(ret))
198 void EC_POINT_free(EC_POINT *point)
200 if (point->meth->point_finish != 0)
201 point->meth->point_finish(point);
206 void EC_POINT_clear_free(EC_POINT *point)
208 if (point->meth->point_clear_finish != 0)
209 point->meth->point_clear_finish(point);
210 else if (point->meth != NULL && point->meth->point_finish != 0)
211 point->meth->point_finish(point);
212 memset(point, 0, sizeof *point);
217 int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src)
219 if (dest->meth->point_copy == 0)
221 ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
224 if (dest->meth != src->meth)
226 ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS);
230 return dest->meth->point_copy(dest, src);
234 /* TODO: 'set' and 'get' functions for EC_POINTs */
237 size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
238 unsigned char *buf, size_t len, BN_CTX *ctx)
240 if (group->meth->point2oct == 0)
242 ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
245 if (group->meth != point->meth)
247 ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
250 return group->meth->point2oct(group, point, form, buf, len, ctx);
254 int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
255 const unsigned char *buf, size_t len, BN_CTX *ctx)
257 if (group->meth->oct2point == 0)
259 ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
262 if (group->meth != point->meth)
264 ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
267 return group->meth->oct2point(group, point, buf, len, ctx);
271 int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *ctx)
273 if (group->meth->add == 0)
275 ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
278 if ((group->meth != r->meth) || (r->meth != a->meth) || (a->meth != b->meth))
280 ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS);
283 return group->meth->add(group, r, a, b, ctx);
287 int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx)
289 if (group->meth->dbl == 0)
291 ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
294 if ((group->meth != r->meth) || (r->meth != a->meth))
296 ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
299 return group->meth->dbl(group, r, a, ctx);
303 int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
305 if (group->meth->is_at_infinity == 0)
307 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
310 if (group->meth != point->meth)
312 ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS);
315 return group->meth->is_at_infinity(group, point);
319 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx)
321 if (group->meth->is_on_curve == 0)
323 ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
326 if (group->meth != point->meth)
328 ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS);
331 return group->meth->is_on_curve(group, point, ctx);
335 int EC_POINT_make_affine(const EC_GROUP *group, const EC_POINT *point, BN_CTX *ctx)
337 if (group->meth->make_affine == 0)
339 ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
342 if (group->meth != point->meth)
344 ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS);
347 return group->meth->make_affine(group, point, ctx);