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 ret
->extra_data
= NULL
;
90 ret
->extra_data_dup_func
= 0;
91 ret
->extra_data_free_func
= 0;
92 ret
->extra_data_clear_free_func
= 0;
94 if (!meth
->group_init(ret
))
104 int EC_GROUP_set_curve_GFp(EC_GROUP
*group
, const BIGNUM
*p
, const BIGNUM
*a
, const BIGNUM
*b
, BN_CTX
*ctx
)
106 if (group
->meth
->group_set_curve_GFp
== 0)
108 ECerr(EC_F_EC_GROUP_SET_CURVE_GFP
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
112 return group
->meth
->group_set_curve_GFp(group
, p
, a
, b
, ctx
);
116 void EC_GROUP_free(EC_GROUP
*group
)
118 if (group
->meth
->group_finish
!= 0)
119 group
->meth
->group_finish(group
);
121 EC_GROUP_free_extra_data(group
);
127 void EC_GROUP_clear_free(EC_GROUP
*group
)
129 if (group
->meth
->group_clear_finish
!= 0)
130 group
->meth
->group_clear_finish(group
);
131 else if (group
->meth
!= NULL
&& group
->meth
->group_finish
!= 0)
132 group
->meth
->group_finish(group
);
134 EC_GROUP_clear_free_extra_data(group
);
136 memset(group
, 0, sizeof *group
);
141 int EC_GROUP_copy(EC_GROUP
*dest
, const EC_GROUP
*src
)
143 if (dest
->meth
->group_copy
== 0)
145 ECerr(EC_F_EC_GROUP_COPY
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
148 if (dest
->meth
!= src
->meth
)
150 ECerr(EC_F_EC_GROUP_COPY
, EC_R_INCOMPATIBLE_OBJECTS
);
154 EC_GROUP_clear_free_extra_data(dest
);
155 if (src
->extra_data_dup_func
)
157 if (src
->extra_data
!= NULL
)
159 dest
->extra_data
= src
->extra_data_dup_func(src
->extra_data
);
160 if (dest
->extra_data
== NULL
)
164 dest
->extra_data_dup_func
= src
->extra_data_dup_func
;
165 dest
->extra_data_free_func
= src
->extra_data_free_func
;
166 dest
->extra_data_clear_free_func
= src
->extra_data_clear_free_func
;
169 return dest
->meth
->group_copy(dest
, src
);
173 int EC_GROUP_set_generator(EC_GROUP
*group
, const EC_POINT
*generator
, const BIGNUM
*order
, const BIGNUM
*cofactor
)
175 if (group
->meth
->group_set_generator
== 0)
177 ECerr(EC_F_EC_GROUP_SET_GENERATOR
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
180 return group
->meth
->group_set_generator(group
, generator
, order
, cofactor
);
184 /* TODO: 'get' functions for EC_GROUPs */
187 /* this has 'package' visibility */
188 int EC_GROUP_set_extra_data(EC_GROUP
*group
, void *extra_data
, void *(*extra_data_dup_func
)(void *),
189 void (*extra_data_free_func
)(void *), void (*extra_data_clear_free_func
)(void *))
191 if ((group
->extra_data
!= NULL
)
192 || (group
->extra_data_dup_func
!= 0)
193 || (group
->extra_data_free_func
!= 0)
194 || (group
->extra_data_clear_free_func
!= 0))
196 ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA
, EC_R_SLOT_FULL
);
200 group
->extra_data
= extra_data
;
201 group
->extra_data_dup_func
= extra_data_dup_func
;
202 group
->extra_data_free_func
= extra_data_free_func
;
203 group
->extra_data_clear_free_func
= extra_data_clear_free_func
;
208 /* this has 'package' visibility */
209 void *EC_GROUP_get_extra_data(EC_GROUP
*group
, void *(*extra_data_dup_func
)(void *),
210 void (*extra_data_free_func
)(void *), void (*extra_data_clear_free_func
)(void *))
212 if ((group
->extra_data_dup_func
!= extra_data_dup_func
)
213 || (group
->extra_data_free_func
!= extra_data_free_func
)
214 || (group
->extra_data_clear_free_func
!= extra_data_clear_free_func
))
216 ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA
, EC_R_NO_SUCH_EXTRA_DATA
);
220 return group
->extra_data
;
224 /* this has 'package' visibility */
225 void EC_GROUP_free_extra_data(EC_GROUP
*group
)
227 if (group
->extra_data_free_func
)
228 group
->extra_data_free_func(group
->extra_data
);
229 group
->extra_data
= NULL
;
230 group
->extra_data_dup_func
= 0;
231 group
->extra_data_free_func
= 0;
232 group
->extra_data_clear_free_func
= 0;
236 /* this has 'package' visibility */
237 void EC_GROUP_clear_free_extra_data(EC_GROUP
*group
)
239 if (group
->extra_data_clear_free_func
)
240 group
->extra_data_clear_free_func(group
->extra_data
);
241 else if (group
->extra_data_free_func
)
242 group
->extra_data_free_func(group
->extra_data
);
243 group
->extra_data
= NULL
;
244 group
->extra_data_dup_func
= 0;
245 group
->extra_data_free_func
= 0;
246 group
->extra_data_clear_free_func
= 0;
251 /* functions for EC_POINT objects */
253 EC_POINT
*EC_POINT_new(const EC_GROUP
*group
)
259 ECerr(EC_F_EC_POINT_NEW
, ERR_R_PASSED_NULL_PARAMETER
);
262 if (group
->meth
->point_init
== 0)
264 ECerr(EC_F_EC_POINT_NEW
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
268 ret
= OPENSSL_malloc(sizeof *ret
);
271 ECerr(EC_F_EC_POINT_NEW
, ERR_R_MALLOC_FAILURE
);
275 ret
->meth
= group
->meth
;
277 if (!ret
->meth
->point_init(ret
))
287 void EC_POINT_free(EC_POINT
*point
)
289 if (point
->meth
->point_finish
!= 0)
290 point
->meth
->point_finish(point
);
295 void EC_POINT_clear_free(EC_POINT
*point
)
297 if (point
->meth
->point_clear_finish
!= 0)
298 point
->meth
->point_clear_finish(point
);
299 else if (point
->meth
!= NULL
&& point
->meth
->point_finish
!= 0)
300 point
->meth
->point_finish(point
);
301 memset(point
, 0, sizeof *point
);
306 int EC_POINT_copy(EC_POINT
*dest
, const EC_POINT
*src
)
308 if (dest
->meth
->point_copy
== 0)
310 ECerr(EC_F_EC_POINT_COPY
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
313 if (dest
->meth
!= src
->meth
)
315 ECerr(EC_F_EC_POINT_COPY
, EC_R_INCOMPATIBLE_OBJECTS
);
319 return dest
->meth
->point_copy(dest
, src
);
323 /* TODO: 'set' and 'get' functions for EC_POINTs */
326 size_t EC_POINT_point2oct(const EC_GROUP
*group
, const EC_POINT
*point
, point_conversion_form_t form
,
327 unsigned char *buf
, size_t len
, BN_CTX
*ctx
)
329 if (group
->meth
->point2oct
== 0)
331 ECerr(EC_F_EC_POINT_POINT2OCT
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
334 if (group
->meth
!= point
->meth
)
336 ECerr(EC_F_EC_POINT_POINT2OCT
, EC_R_INCOMPATIBLE_OBJECTS
);
339 return group
->meth
->point2oct(group
, point
, form
, buf
, len
, ctx
);
343 int EC_POINT_oct2point(const EC_GROUP
*group
, EC_POINT
*point
,
344 const unsigned char *buf
, size_t len
, BN_CTX
*ctx
)
346 if (group
->meth
->oct2point
== 0)
348 ECerr(EC_F_EC_POINT_OCT2POINT
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
351 if (group
->meth
!= point
->meth
)
353 ECerr(EC_F_EC_POINT_OCT2POINT
, EC_R_INCOMPATIBLE_OBJECTS
);
356 return group
->meth
->oct2point(group
, point
, buf
, len
, ctx
);
360 int EC_POINT_add(const EC_GROUP
*group
, EC_POINT
*r
, const EC_POINT
*a
, const EC_POINT
*b
, BN_CTX
*ctx
)
362 if (group
->meth
->add
== 0)
364 ECerr(EC_F_EC_POINT_ADD
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
367 if ((group
->meth
!= r
->meth
) || (r
->meth
!= a
->meth
) || (a
->meth
!= b
->meth
))
369 ECerr(EC_F_EC_POINT_ADD
, EC_R_INCOMPATIBLE_OBJECTS
);
372 return group
->meth
->add(group
, r
, a
, b
, ctx
);
376 int EC_POINT_dbl(const EC_GROUP
*group
, EC_POINT
*r
, const EC_POINT
*a
, BN_CTX
*ctx
)
378 if (group
->meth
->dbl
== 0)
380 ECerr(EC_F_EC_POINT_DBL
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
383 if ((group
->meth
!= r
->meth
) || (r
->meth
!= a
->meth
))
385 ECerr(EC_F_EC_POINT_DBL
, EC_R_INCOMPATIBLE_OBJECTS
);
388 return group
->meth
->dbl(group
, r
, a
, ctx
);
392 int EC_POINT_is_at_infinity(const EC_GROUP
*group
, const EC_POINT
*point
)
394 if (group
->meth
->is_at_infinity
== 0)
396 ECerr(EC_F_EC_POINT_IS_AT_INFINITY
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
399 if (group
->meth
!= point
->meth
)
401 ECerr(EC_F_EC_POINT_IS_AT_INFINITY
, EC_R_INCOMPATIBLE_OBJECTS
);
404 return group
->meth
->is_at_infinity(group
, point
);
408 int EC_POINT_is_on_curve(const EC_GROUP
*group
, const EC_POINT
*point
, BN_CTX
*ctx
)
410 if (group
->meth
->is_on_curve
== 0)
412 ECerr(EC_F_EC_POINT_IS_ON_CURVE
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
415 if (group
->meth
!= point
->meth
)
417 ECerr(EC_F_EC_POINT_IS_ON_CURVE
, EC_R_INCOMPATIBLE_OBJECTS
);
420 return group
->meth
->is_on_curve(group
, point
, ctx
);
424 int EC_POINT_make_affine(const EC_GROUP
*group
, const EC_POINT
*point
, BN_CTX
*ctx
)
426 if (group
->meth
->make_affine
== 0)
428 ECerr(EC_F_EC_POINT_MAKE_AFFINE
, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
);
431 if (group
->meth
!= point
->meth
)
433 ECerr(EC_F_EC_POINT_MAKE_AFFINE
, EC_R_INCOMPATIBLE_OBJECTS
);
436 return group
->meth
->make_affine(group
, point
, ctx
);