3 /* ====================================================================
4 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
18 * 3. All advertising materials mentioning features or use of this
19 * software must display the following acknowledgment:
20 * "This product includes software developed by the OpenSSL Project
21 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
23 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
24 * endorse or promote products derived from this software without
25 * prior written permission. For written permission, please contact
26 * openssl-core@openssl.org.
28 * 5. Products derived from this software may not be called "OpenSSL"
29 * nor may "OpenSSL" appear in their names without prior written
30 * permission of the OpenSSL Project.
32 * 6. Redistributions of any form whatsoever must retain the following
34 * "This product includes software developed by the OpenSSL Project
35 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
37 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
38 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
40 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
44 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
46 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
48 * OF THE POSSIBILITY OF SUCH DAMAGE.
49 * ====================================================================
51 * This product includes cryptographic software written by Eric Young
52 * (eay@cryptsoft.com). This product includes software written by Tim
53 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/bn.h>
69 POINT_CONVERSION_COMPRESSED = 2,
70 POINT_CONVERSION_UNCOMPRESSED = 4,
71 POINT_CONVERSION_HYBRID = 6
72 } point_conversion_form_t;
75 typedef struct ec_method_st EC_METHOD;
77 typedef struct ec_group_st
82 -- optional generator with associated information (order, cofactor)
83 -- optional Lim/Lee precomputation table
87 typedef struct ec_point_st EC_POINT;
90 /* EC_METHODs for curves over GF(p).
91 * EC_GFp_simple_method provides the basis for the optimized methods.
94 const EC_METHOD *EC_GFp_simple_method(void);
95 const EC_METHOD *EC_GFp_mont_method(void);
96 const EC_METHOD *EC_GFp_recp_method(void);
97 const EC_METHOD *EC_GFp_nist_method(void);
100 EC_GROUP *EC_GROUP_new(const EC_METHOD *);
101 /* We don't have types for field specifications and field elements in general.
102 * Otherwise we would declare
103 * int EC_GROUP_set_curve(EC_GROUP *, .....);
105 int EC_GROUP_set_curve_GFp(EC_GROUP *, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *);
106 void EC_GROUP_free(EC_GROUP *);
107 void EC_GROUP_clear_free(EC_GROUP *);
108 int EC_GROUP_copy(EC_GROUP *, const EC_GROUP*);
110 /* EC_GROUP_new_GFp() calls EC_GROUP_new() and EC_GROUP_set_GFp()
111 * after choosing an appropriate EC_METHOD */
112 EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *);
114 int EC_GROUP_set_generator(EC_GROUP *, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor);
116 /* TODO: 'get' functions for EC_GROUPs */
119 EC_POINT *EC_POINT_new(const EC_GROUP *);
120 void EC_POINT_free(EC_POINT *);
121 void EC_POINT_clear_free(EC_POINT *);
122 int EC_POINT_copy(EC_POINT *, const EC_POINT *);
124 /* TODO: 'set' and 'get' functions for EC_POINTs */
126 size_t EC_POINT_point2oct(const EC_GROUP *, const EC_POINT *, point_conversion_form_t form,
127 unsigned char *buf, size_t len, BN_CTX *);
128 int EC_POINT_oct2point(const EC_GROUP *, EC_POINT *,
129 const unsigned char *buf, size_t len, BN_CTX *);
131 int EC_POINT_add(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, BN_CTX *);
132 int EC_POINT_dbl(const EC_GROUP *, EC_POINT *r, const EC_POINT *a, BN_CTX *);
134 int EC_POINT_is_at_infinity(const EC_GROUP *, const EC_POINT *);
135 int EC_POINT_is_on_curve(const EC_GROUP *, const EC_POINT *, BN_CTX *);
137 int EC_POINT_make_affine(const EC_GROUP *, const EC_POINT *, BN_CTX *);
141 /* TODO: scalar multiplication */
145 /* BEGIN ERROR CODES */
146 /* The following lines are auto generated by the script mkerr.pl. Any changes
147 * made after this point may be overwritten when the script is next run.
150 /* Error codes for the EC functions. */
152 /* Function codes. */
153 #define EC_F_EC_GROUP_CLEAR_FREE 103
154 #define EC_F_EC_GROUP_COPY 102
155 #define EC_F_EC_GROUP_FREE 104
156 #define EC_F_EC_GROUP_NEW 100
157 #define EC_F_EC_GROUP_SET_CURVE_GFP 101
158 #define EC_F_EC_GROUP_SET_GENERATOR 106
159 #define EC_F_EC_POINT_ADD 107
160 #define EC_F_EC_POINT_COPY 108
161 #define EC_F_EC_POINT_DBL 109
162 #define EC_F_EC_POINT_IS_AT_INFINITY 110
163 #define EC_F_EC_POINT_IS_ON_CURVE 111
164 #define EC_F_EC_POINT_MAKE_AFFINE 112
165 #define EC_F_EC_POINT_NEW 105
166 #define EC_F_EC_POINT_OCT2POINT 113
167 #define EC_F_EC_POINT_POINT2OCT 114
170 #define EC_R_INCOMPATIBLE_OBJECTS 100