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
);