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5c6bf031 BM |
1 | /* |
2 | * Written by Nils Larsch for the OpenSSL project. | |
3 | */ | |
38e3c581 | 4 | /* ==================================================================== |
bd1217a1 | 5 | * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
38e3c581 BM |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 12 | * notice, this list of conditions and the following disclaimer. |
38e3c581 BM |
13 | * |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * | |
19 | * 3. All advertising materials mentioning features or use of this | |
20 | * software must display the following acknowledgment: | |
21 | * "This product includes software developed by the OpenSSL Project | |
22 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
23 | * | |
24 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
25 | * endorse or promote products derived from this software without | |
26 | * prior written permission. For written permission, please contact | |
27 | * openssl-core@openssl.org. | |
28 | * | |
29 | * 5. Products derived from this software may not be called "OpenSSL" | |
30 | * nor may "OpenSSL" appear in their names without prior written | |
31 | * permission of the OpenSSL Project. | |
32 | * | |
33 | * 6. Redistributions of any form whatsoever must retain the following | |
34 | * acknowledgment: | |
35 | * "This product includes software developed by the OpenSSL Project | |
36 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
37 | * | |
38 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
39 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
40 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
41 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
42 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
44 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
47 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
48 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
49 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
50 | * ==================================================================== | |
51 | * | |
52 | * This product includes cryptographic software written by Eric Young | |
53 | * (eay@cryptsoft.com). This product includes software written by Tim | |
54 | * Hudson (tjh@cryptsoft.com). | |
55 | * | |
56 | */ | |
7793f30e BM |
57 | /* ==================================================================== |
58 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
59 | * Portions of this software developed by SUN MICROSYSTEMS, INC., | |
60 | * and contributed to the OpenSSL project. | |
61 | */ | |
38e3c581 | 62 | |
37942fab NL |
63 | #include <limits.h> |
64 | ||
5c6bf031 BM |
65 | #include <openssl/err.h> |
66 | #include <openssl/obj_mac.h> | |
38e3c581 | 67 | #include "ec_lcl.h" |
0657bf9c | 68 | |
0657bf9c | 69 | const EC_METHOD *EC_GFp_nist_method(void) |
0f113f3e MC |
70 | { |
71 | static const EC_METHOD ret = { | |
72 | EC_FLAGS_DEFAULT_OCT, | |
73 | NID_X9_62_prime_field, | |
74 | ec_GFp_simple_group_init, | |
75 | ec_GFp_simple_group_finish, | |
76 | ec_GFp_simple_group_clear_finish, | |
77 | ec_GFp_nist_group_copy, | |
78 | ec_GFp_nist_group_set_curve, | |
79 | ec_GFp_simple_group_get_curve, | |
80 | ec_GFp_simple_group_get_degree, | |
81 | ec_GFp_simple_group_check_discriminant, | |
82 | ec_GFp_simple_point_init, | |
83 | ec_GFp_simple_point_finish, | |
84 | ec_GFp_simple_point_clear_finish, | |
85 | ec_GFp_simple_point_copy, | |
86 | ec_GFp_simple_point_set_to_infinity, | |
87 | ec_GFp_simple_set_Jprojective_coordinates_GFp, | |
88 | ec_GFp_simple_get_Jprojective_coordinates_GFp, | |
89 | ec_GFp_simple_point_set_affine_coordinates, | |
90 | ec_GFp_simple_point_get_affine_coordinates, | |
91 | 0, 0, 0, | |
92 | ec_GFp_simple_add, | |
93 | ec_GFp_simple_dbl, | |
94 | ec_GFp_simple_invert, | |
95 | ec_GFp_simple_is_at_infinity, | |
96 | ec_GFp_simple_is_on_curve, | |
97 | ec_GFp_simple_cmp, | |
98 | ec_GFp_simple_make_affine, | |
99 | ec_GFp_simple_points_make_affine, | |
100 | 0 /* mul */ , | |
101 | 0 /* precompute_mult */ , | |
102 | 0 /* have_precompute_mult */ , | |
103 | ec_GFp_nist_field_mul, | |
104 | ec_GFp_nist_field_sqr, | |
105 | 0 /* field_div */ , | |
106 | 0 /* field_encode */ , | |
107 | 0 /* field_decode */ , | |
108 | 0 /* field_set_to_one */ | |
109 | }; | |
110 | ||
111 | return &ret; | |
112 | } | |
60428dbf | 113 | |
e2c9c91b | 114 | int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src) |
0f113f3e MC |
115 | { |
116 | dest->field_mod_func = src->field_mod_func; | |
e2c9c91b | 117 | |
0f113f3e MC |
118 | return ec_GFp_simple_group_copy(dest, src); |
119 | } | |
5c6bf031 BM |
120 | |
121 | int ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p, | |
0f113f3e MC |
122 | const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
123 | { | |
124 | int ret = 0; | |
125 | BN_CTX *new_ctx = NULL; | |
126 | ||
127 | if (ctx == NULL) | |
128 | if ((ctx = new_ctx = BN_CTX_new()) == NULL) | |
129 | return 0; | |
130 | ||
131 | BN_CTX_start(ctx); | |
132 | ||
133 | if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0) | |
134 | group->field_mod_func = BN_nist_mod_192; | |
135 | else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0) | |
136 | group->field_mod_func = BN_nist_mod_224; | |
137 | else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0) | |
138 | group->field_mod_func = BN_nist_mod_256; | |
139 | else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0) | |
140 | group->field_mod_func = BN_nist_mod_384; | |
141 | else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0) | |
142 | group->field_mod_func = BN_nist_mod_521; | |
143 | else { | |
144 | ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME); | |
145 | goto err; | |
146 | } | |
147 | ||
148 | ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); | |
5c6bf031 BM |
149 | |
150 | err: | |
0f113f3e | 151 | BN_CTX_end(ctx); |
23a1d5e9 | 152 | BN_CTX_free(new_ctx); |
0f113f3e MC |
153 | return ret; |
154 | } | |
a2dbcf36 | 155 | |
5c6bf031 | 156 | int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, |
0f113f3e MC |
157 | const BIGNUM *b, BN_CTX *ctx) |
158 | { | |
159 | int ret = 0; | |
160 | BN_CTX *ctx_new = NULL; | |
161 | ||
162 | if (!group || !r || !a || !b) { | |
163 | ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER); | |
164 | goto err; | |
165 | } | |
166 | if (!ctx) | |
167 | if ((ctx_new = ctx = BN_CTX_new()) == NULL) | |
168 | goto err; | |
169 | ||
170 | if (!BN_mul(r, a, b, ctx)) | |
171 | goto err; | |
172 | if (!group->field_mod_func(r, r, group->field, ctx)) | |
173 | goto err; | |
174 | ||
175 | ret = 1; | |
176 | err: | |
23a1d5e9 | 177 | BN_CTX_free(ctx_new); |
0f113f3e MC |
178 | return ret; |
179 | } | |
a2dbcf36 | 180 | |
5c6bf031 | 181 | int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, |
0f113f3e MC |
182 | BN_CTX *ctx) |
183 | { | |
184 | int ret = 0; | |
185 | BN_CTX *ctx_new = NULL; | |
186 | ||
187 | if (!group || !r || !a) { | |
188 | ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER); | |
189 | goto err; | |
190 | } | |
191 | if (!ctx) | |
192 | if ((ctx_new = ctx = BN_CTX_new()) == NULL) | |
193 | goto err; | |
194 | ||
195 | if (!BN_sqr(r, a, ctx)) | |
196 | goto err; | |
197 | if (!group->field_mod_func(r, r, group->field, ctx)) | |
198 | goto err; | |
199 | ||
200 | ret = 1; | |
201 | err: | |
23a1d5e9 | 202 | BN_CTX_free(ctx_new); |
0f113f3e MC |
203 | return ret; |
204 | } |