OLD | NEW |
| (Empty) |
1 /* crypto/ec/ecp_nist.c */ | |
2 /* | |
3 * Written by Nils Larsch for the OpenSSL project. | |
4 */ | |
5 /* ==================================================================== | |
6 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. | |
7 * | |
8 * Redistribution and use in source and binary forms, with or without | |
9 * modification, are permitted provided that the following conditions | |
10 * are met: | |
11 * | |
12 * 1. Redistributions of source code must retain the above copyright | |
13 * notice, this list of conditions and the following disclaimer. | |
14 * | |
15 * 2. Redistributions in binary form must reproduce the above copyright | |
16 * notice, this list of conditions and the following disclaimer in | |
17 * the documentation and/or other materials provided with the | |
18 * distribution. | |
19 * | |
20 * 3. All advertising materials mentioning features or use of this | |
21 * software must display the following acknowledgment: | |
22 * "This product includes software developed by the OpenSSL Project | |
23 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
24 * | |
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 * endorse or promote products derived from this software without | |
27 * prior written permission. For written permission, please contact | |
28 * openssl-core@openssl.org. | |
29 * | |
30 * 5. Products derived from this software may not be called "OpenSSL" | |
31 * nor may "OpenSSL" appear in their names without prior written | |
32 * permission of the OpenSSL Project. | |
33 * | |
34 * 6. Redistributions of any form whatsoever must retain the following | |
35 * acknowledgment: | |
36 * "This product includes software developed by the OpenSSL Project | |
37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
38 * | |
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 * ==================================================================== | |
52 * | |
53 * This product includes cryptographic software written by Eric Young | |
54 * (eay@cryptsoft.com). This product includes software written by Tim | |
55 * Hudson (tjh@cryptsoft.com). | |
56 * | |
57 */ | |
58 /* ==================================================================== | |
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
60 * Portions of this software developed by SUN MICROSYSTEMS, INC., | |
61 * and contributed to the OpenSSL project. | |
62 */ | |
63 | |
64 #include <limits.h> | |
65 | |
66 #include <openssl/err.h> | |
67 #include <openssl/obj_mac.h> | |
68 #include "ec_lcl.h" | |
69 | |
70 #ifdef OPENSSL_FIPS | |
71 #include <openssl/fips.h> | |
72 #endif | |
73 | |
74 const EC_METHOD *EC_GFp_nist_method(void) | |
75 { | |
76 #ifdef OPENSSL_FIPS | |
77 return fips_ec_gfp_nist_method(); | |
78 #else | |
79 static const EC_METHOD ret = { | |
80 EC_FLAGS_DEFAULT_OCT, | |
81 NID_X9_62_prime_field, | |
82 ec_GFp_simple_group_init, | |
83 ec_GFp_simple_group_finish, | |
84 ec_GFp_simple_group_clear_finish, | |
85 ec_GFp_nist_group_copy, | |
86 ec_GFp_nist_group_set_curve, | |
87 ec_GFp_simple_group_get_curve, | |
88 ec_GFp_simple_group_get_degree, | |
89 ec_GFp_simple_group_check_discriminant, | |
90 ec_GFp_simple_point_init, | |
91 ec_GFp_simple_point_finish, | |
92 ec_GFp_simple_point_clear_finish, | |
93 ec_GFp_simple_point_copy, | |
94 ec_GFp_simple_point_set_to_infinity, | |
95 ec_GFp_simple_set_Jprojective_coordinates_GFp, | |
96 ec_GFp_simple_get_Jprojective_coordinates_GFp, | |
97 ec_GFp_simple_point_set_affine_coordinates, | |
98 ec_GFp_simple_point_get_affine_coordinates, | |
99 0,0,0, | |
100 ec_GFp_simple_add, | |
101 ec_GFp_simple_dbl, | |
102 ec_GFp_simple_invert, | |
103 ec_GFp_simple_is_at_infinity, | |
104 ec_GFp_simple_is_on_curve, | |
105 ec_GFp_simple_cmp, | |
106 ec_GFp_simple_make_affine, | |
107 ec_GFp_simple_points_make_affine, | |
108 0 /* mul */, | |
109 0 /* precompute_mult */, | |
110 0 /* have_precompute_mult */, | |
111 ec_GFp_nist_field_mul, | |
112 ec_GFp_nist_field_sqr, | |
113 0 /* field_div */, | |
114 0 /* field_encode */, | |
115 0 /* field_decode */, | |
116 0 /* field_set_to_one */ }; | |
117 | |
118 return &ret; | |
119 #endif | |
120 } | |
121 | |
122 int ec_GFp_nist_group_copy(EC_GROUP *dest, const EC_GROUP *src) | |
123 { | |
124 dest->field_mod_func = src->field_mod_func; | |
125 | |
126 return ec_GFp_simple_group_copy(dest, src); | |
127 } | |
128 | |
129 int ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p, | |
130 const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) | |
131 { | |
132 int ret = 0; | |
133 BN_CTX *new_ctx = NULL; | |
134 BIGNUM *tmp_bn; | |
135 | |
136 if (ctx == NULL) | |
137 if ((ctx = new_ctx = BN_CTX_new()) == NULL) return 0; | |
138 | |
139 BN_CTX_start(ctx); | |
140 if ((tmp_bn = BN_CTX_get(ctx)) == NULL) goto err; | |
141 | |
142 if (BN_ucmp(BN_get0_nist_prime_192(), p) == 0) | |
143 group->field_mod_func = BN_nist_mod_192; | |
144 else if (BN_ucmp(BN_get0_nist_prime_224(), p) == 0) | |
145 group->field_mod_func = BN_nist_mod_224; | |
146 else if (BN_ucmp(BN_get0_nist_prime_256(), p) == 0) | |
147 group->field_mod_func = BN_nist_mod_256; | |
148 else if (BN_ucmp(BN_get0_nist_prime_384(), p) == 0) | |
149 group->field_mod_func = BN_nist_mod_384; | |
150 else if (BN_ucmp(BN_get0_nist_prime_521(), p) == 0) | |
151 group->field_mod_func = BN_nist_mod_521; | |
152 else | |
153 { | |
154 ECerr(EC_F_EC_GFP_NIST_GROUP_SET_CURVE, EC_R_NOT_A_NIST_PRIME); | |
155 goto err; | |
156 } | |
157 | |
158 ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); | |
159 | |
160 err: | |
161 BN_CTX_end(ctx); | |
162 if (new_ctx != NULL) | |
163 BN_CTX_free(new_ctx); | |
164 return ret; | |
165 } | |
166 | |
167 | |
168 int ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, | |
169 const BIGNUM *b, BN_CTX *ctx) | |
170 { | |
171 int ret=0; | |
172 BN_CTX *ctx_new=NULL; | |
173 | |
174 if (!group || !r || !a || !b) | |
175 { | |
176 ECerr(EC_F_EC_GFP_NIST_FIELD_MUL, ERR_R_PASSED_NULL_PARAMETER); | |
177 goto err; | |
178 } | |
179 if (!ctx) | |
180 if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err; | |
181 | |
182 if (!BN_mul(r, a, b, ctx)) goto err; | |
183 if (!group->field_mod_func(r, r, &group->field, ctx)) | |
184 goto err; | |
185 | |
186 ret=1; | |
187 err: | |
188 if (ctx_new) | |
189 BN_CTX_free(ctx_new); | |
190 return ret; | |
191 } | |
192 | |
193 | |
194 int ec_GFp_nist_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, | |
195 BN_CTX *ctx) | |
196 { | |
197 int ret=0; | |
198 BN_CTX *ctx_new=NULL; | |
199 | |
200 if (!group || !r || !a) | |
201 { | |
202 ECerr(EC_F_EC_GFP_NIST_FIELD_SQR, EC_R_PASSED_NULL_PARAMETER); | |
203 goto err; | |
204 } | |
205 if (!ctx) | |
206 if ((ctx_new = ctx = BN_CTX_new()) == NULL) goto err; | |
207 | |
208 if (!BN_sqr(r, a, ctx)) goto err; | |
209 if (!group->field_mod_func(r, r, &group->field, ctx)) | |
210 goto err; | |
211 | |
212 ret=1; | |
213 err: | |
214 if (ctx_new) | |
215 BN_CTX_free(ctx_new); | |
216 return ret; | |
217 } | |
OLD | NEW |