| 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 | } |