File: | src/lib/libcrypto/ec/ecp_nist.c |
Warning: | line 139, column 7 Although the value stored to 'tmp_bn' is used in the enclosing expression, the value is never actually read from 'tmp_bn' |
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1 | /* $OpenBSD: ecp_nist.c,v 1.18 2021/09/08 17:29:21 tb Exp $ */ |
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 | const EC_METHOD * |
71 | EC_GFp_nist_method(void) |
72 | { |
73 | static const EC_METHOD ret = { |
74 | .flags = EC_FLAGS_DEFAULT_OCT0x1, |
75 | .field_type = NID_X9_62_prime_field406, |
76 | .group_init = ec_GFp_simple_group_init, |
77 | .group_finish = ec_GFp_simple_group_finish, |
78 | .group_clear_finish = ec_GFp_simple_group_clear_finish, |
79 | .group_copy = ec_GFp_nist_group_copy, |
80 | .group_set_curve = ec_GFp_nist_group_set_curve, |
81 | .group_get_curve = ec_GFp_simple_group_get_curve, |
82 | .group_get_degree = ec_GFp_simple_group_get_degree, |
83 | .group_order_bits = ec_group_simple_order_bits, |
84 | .group_check_discriminant = |
85 | ec_GFp_simple_group_check_discriminant, |
86 | .point_init = ec_GFp_simple_point_init, |
87 | .point_finish = ec_GFp_simple_point_finish, |
88 | .point_clear_finish = ec_GFp_simple_point_clear_finish, |
89 | .point_copy = ec_GFp_simple_point_copy, |
90 | .point_set_to_infinity = ec_GFp_simple_point_set_to_infinity, |
91 | .point_set_Jprojective_coordinates = |
92 | ec_GFp_simple_set_Jprojective_coordinates, |
93 | .point_get_Jprojective_coordinates = |
94 | ec_GFp_simple_get_Jprojective_coordinates, |
95 | .point_set_affine_coordinates = |
96 | ec_GFp_simple_point_set_affine_coordinates, |
97 | .point_get_affine_coordinates = |
98 | ec_GFp_simple_point_get_affine_coordinates, |
99 | .add = ec_GFp_simple_add, |
100 | .dbl = ec_GFp_simple_dbl, |
101 | .invert = ec_GFp_simple_invert, |
102 | .is_at_infinity = ec_GFp_simple_is_at_infinity, |
103 | .is_on_curve = ec_GFp_simple_is_on_curve, |
104 | .point_cmp = ec_GFp_simple_cmp, |
105 | .make_affine = ec_GFp_simple_make_affine, |
106 | .points_make_affine = ec_GFp_simple_points_make_affine, |
107 | .mul_generator_ct = ec_GFp_simple_mul_generator_ct, |
108 | .mul_single_ct = ec_GFp_simple_mul_single_ct, |
109 | .mul_double_nonct = ec_GFp_simple_mul_double_nonct, |
110 | .field_mul = ec_GFp_nist_field_mul, |
111 | .field_sqr = ec_GFp_nist_field_sqr, |
112 | .blind_coordinates = ec_GFp_simple_blind_coordinates, |
113 | }; |
114 | |
115 | return &ret; |
116 | } |
117 | |
118 | int |
119 | ec_GFp_nist_group_copy(EC_GROUP * dest, const EC_GROUP * src) |
120 | { |
121 | dest->field_mod_func = src->field_mod_func; |
122 | |
123 | return ec_GFp_simple_group_copy(dest, src); |
124 | } |
125 | |
126 | int |
127 | ec_GFp_nist_group_set_curve(EC_GROUP *group, const BIGNUM *p, |
128 | const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) |
129 | { |
130 | int ret = 0; |
131 | BN_CTX *new_ctx = NULL((void *)0); |
132 | BIGNUM *tmp_bn; |
133 | |
134 | if (ctx == NULL((void *)0)) |
135 | if ((ctx = new_ctx = BN_CTX_new()) == NULL((void *)0)) |
136 | return 0; |
137 | |
138 | BN_CTX_start(ctx); |
139 | if ((tmp_bn = BN_CTX_get(ctx)) == NULL((void *)0)) |
Although the value stored to 'tmp_bn' is used in the enclosing expression, the value is never actually read from 'tmp_bn' | |
140 | 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 | ECerror(EC_R_NOT_A_NIST_PRIME)ERR_put_error(16,(0xfff),(135),"/usr/src/lib/libcrypto/ec/ecp_nist.c" ,153); |
154 | goto err; |
155 | } |
156 | |
157 | ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); |
158 | |
159 | err: |
160 | BN_CTX_end(ctx); |
161 | BN_CTX_free(new_ctx); |
162 | return ret; |
163 | } |
164 | |
165 | |
166 | int |
167 | ec_GFp_nist_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, |
168 | const BIGNUM *b, BN_CTX *ctx) |
169 | { |
170 | int ret = 0; |
171 | BN_CTX *ctx_new = NULL((void *)0); |
172 | |
173 | if (!group || !r || !a || !b) { |
174 | ECerror(ERR_R_PASSED_NULL_PARAMETER)ERR_put_error(16,(0xfff),((3|64)),"/usr/src/lib/libcrypto/ec/ecp_nist.c" ,174); |
175 | goto err; |
176 | } |
177 | if (!ctx) |
178 | if ((ctx_new = ctx = BN_CTX_new()) == NULL((void *)0)) |
179 | goto err; |
180 | |
181 | if (!BN_mul(r, a, b, ctx)) |
182 | goto err; |
183 | if (!group->field_mod_func(r, r, &group->field, ctx)) |
184 | goto err; |
185 | |
186 | ret = 1; |
187 | err: |
188 | BN_CTX_free(ctx_new); |
189 | return ret; |
190 | } |
191 | |
192 | |
193 | int |
194 | 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((void *)0); |
199 | |
200 | if (!group || !r || !a) { |
201 | ECerror(EC_R_PASSED_NULL_PARAMETER)ERR_put_error(16,(0xfff),(134),"/usr/src/lib/libcrypto/ec/ecp_nist.c" ,201); |
202 | goto err; |
203 | } |
204 | if (!ctx) |
205 | if ((ctx_new = ctx = BN_CTX_new()) == NULL((void *)0)) |
206 | goto err; |
207 | |
208 | if (!BN_sqr(r, a, ctx)) |
209 | goto err; |
210 | if (!group->field_mod_func(r, r, &group->field, ctx)) |
211 | goto err; |
212 | |
213 | ret = 1; |
214 | err: |
215 | BN_CTX_free(ctx_new); |
216 | return ret; |
217 | } |