Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Originally written by Bodo Moeller for the OpenSSL project. |
| 2 | * ==================================================================== |
| 3 | * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in |
| 14 | * the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * |
| 17 | * 3. All advertising materials mentioning features or use of this |
| 18 | * software must display the following acknowledgment: |
| 19 | * "This product includes software developed by the OpenSSL Project |
| 20 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 21 | * |
| 22 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 23 | * endorse or promote products derived from this software without |
| 24 | * prior written permission. For written permission, please contact |
| 25 | * openssl-core@openssl.org. |
| 26 | * |
| 27 | * 5. Products derived from this software may not be called "OpenSSL" |
| 28 | * nor may "OpenSSL" appear in their names without prior written |
| 29 | * permission of the OpenSSL Project. |
| 30 | * |
| 31 | * 6. Redistributions of any form whatsoever must retain the following |
| 32 | * acknowledgment: |
| 33 | * "This product includes software developed by the OpenSSL Project |
| 34 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 35 | * |
| 36 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 37 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 38 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 39 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 40 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 41 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 42 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 43 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 45 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 46 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 47 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 48 | * ==================================================================== |
| 49 | * |
| 50 | * This product includes cryptographic software written by Eric Young |
| 51 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 52 | * Hudson (tjh@cryptsoft.com). |
| 53 | * |
| 54 | */ |
| 55 | /* ==================================================================== |
| 56 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 57 | * |
| 58 | * Portions of the attached software ("Contribution") are developed by |
| 59 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
| 60 | * |
| 61 | * The Contribution is licensed pursuant to the OpenSSL open source |
| 62 | * license provided above. |
| 63 | * |
| 64 | * The elliptic curve binary polynomial software is originally written by |
| 65 | * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems |
| 66 | * Laboratories. */ |
| 67 | |
| 68 | #include <openssl/ec.h> |
| 69 | |
| 70 | #include <string.h> |
| 71 | |
| 72 | #include <openssl/bn.h> |
| 73 | #include <openssl/err.h> |
| 74 | #include <openssl/mem.h> |
| 75 | #include <openssl/obj.h> |
| 76 | |
| 77 | #include "internal.h" |
| 78 | |
| 79 | |
| 80 | static const struct curve_data P224 = { |
| 81 | "NIST P-224", |
| 82 | 28, |
| 83 | 1, |
| 84 | {/* p */ |
| 85 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 86 | 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 87 | 0x00, 0x00, 0x00, 0x01, |
| 88 | /* a */ |
| 89 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 90 | 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 91 | 0xFF, 0xFF, 0xFF, 0xFE, |
| 92 | /* b */ |
| 93 | 0xB4, 0x05, 0x0A, 0x85, 0x0C, 0x04, 0xB3, 0xAB, 0xF5, 0x41, 0x32, 0x56, |
| 94 | 0x50, 0x44, 0xB0, 0xB7, 0xD7, 0xBF, 0xD8, 0xBA, 0x27, 0x0B, 0x39, 0x43, |
| 95 | 0x23, 0x55, 0xFF, 0xB4, |
| 96 | /* x */ |
| 97 | 0xB7, 0x0E, 0x0C, 0xBD, 0x6B, 0xB4, 0xBF, 0x7F, 0x32, 0x13, 0x90, 0xB9, |
| 98 | 0x4A, 0x03, 0xC1, 0xD3, 0x56, 0xC2, 0x11, 0x22, 0x34, 0x32, 0x80, 0xD6, |
| 99 | 0x11, 0x5C, 0x1D, 0x21, |
| 100 | /* y */ |
| 101 | 0xbd, 0x37, 0x63, 0x88, 0xb5, 0xf7, 0x23, 0xfb, 0x4c, 0x22, 0xdf, 0xe6, |
| 102 | 0xcd, 0x43, 0x75, 0xa0, 0x5a, 0x07, 0x47, 0x64, 0x44, 0xd5, 0x81, 0x99, |
| 103 | 0x85, 0x00, 0x7e, 0x34, |
| 104 | /* order */ |
| 105 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 106 | 0xFF, 0xFF, 0x16, 0xA2, 0xE0, 0xB8, 0xF0, 0x3E, 0x13, 0xDD, 0x29, 0x45, |
| 107 | 0x5C, 0x5C, 0x2A, 0x3D, |
| 108 | }}; |
| 109 | |
| 110 | static const struct curve_data P256 = { |
| 111 | "NIST P-256", |
| 112 | 32, |
| 113 | 1, |
| 114 | {/* p */ |
| 115 | 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 116 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, |
| 117 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 118 | /* a */ |
| 119 | 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, |
| 120 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, |
| 121 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, |
| 122 | /* b */ |
| 123 | 0x5A, 0xC6, 0x35, 0xD8, 0xAA, 0x3A, 0x93, 0xE7, 0xB3, 0xEB, 0xBD, 0x55, |
| 124 | 0x76, 0x98, 0x86, 0xBC, 0x65, 0x1D, 0x06, 0xB0, 0xCC, 0x53, 0xB0, 0xF6, |
| 125 | 0x3B, 0xCE, 0x3C, 0x3E, 0x27, 0xD2, 0x60, 0x4B, |
| 126 | /* x */ |
| 127 | 0x6B, 0x17, 0xD1, 0xF2, 0xE1, 0x2C, 0x42, 0x47, 0xF8, 0xBC, 0xE6, 0xE5, |
| 128 | 0x63, 0xA4, 0x40, 0xF2, 0x77, 0x03, 0x7D, 0x81, 0x2D, 0xEB, 0x33, 0xA0, |
| 129 | 0xF4, 0xA1, 0x39, 0x45, 0xD8, 0x98, 0xC2, 0x96, |
| 130 | /* y */ |
| 131 | 0x4f, 0xe3, 0x42, 0xe2, 0xfe, 0x1a, 0x7f, 0x9b, 0x8e, 0xe7, 0xeb, 0x4a, |
| 132 | 0x7c, 0x0f, 0x9e, 0x16, 0x2b, 0xce, 0x33, 0x57, 0x6b, 0x31, 0x5e, 0xce, |
| 133 | 0xcb, 0xb6, 0x40, 0x68, 0x37, 0xbf, 0x51, 0xf5, |
| 134 | /* order */ |
| 135 | 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, |
| 136 | 0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, |
| 137 | 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51}}; |
| 138 | |
| 139 | static const struct curve_data P384 = { |
| 140 | "NIST P-384", |
| 141 | 48, |
| 142 | 1, |
| 143 | {/* p */ |
| 144 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 145 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 146 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, |
| 147 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, |
| 148 | /* a */ |
| 149 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 150 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 151 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, |
| 152 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFC, |
| 153 | /* b */ |
| 154 | 0xB3, 0x31, 0x2F, 0xA7, 0xE2, 0x3E, 0xE7, 0xE4, 0x98, 0x8E, 0x05, 0x6B, |
| 155 | 0xE3, 0xF8, 0x2D, 0x19, 0x18, 0x1D, 0x9C, 0x6E, 0xFE, 0x81, 0x41, 0x12, |
| 156 | 0x03, 0x14, 0x08, 0x8F, 0x50, 0x13, 0x87, 0x5A, 0xC6, 0x56, 0x39, 0x8D, |
| 157 | 0x8A, 0x2E, 0xD1, 0x9D, 0x2A, 0x85, 0xC8, 0xED, 0xD3, 0xEC, 0x2A, 0xEF, |
| 158 | /* x */ |
| 159 | 0xAA, 0x87, 0xCA, 0x22, 0xBE, 0x8B, 0x05, 0x37, 0x8E, 0xB1, 0xC7, 0x1E, |
| 160 | 0xF3, 0x20, 0xAD, 0x74, 0x6E, 0x1D, 0x3B, 0x62, 0x8B, 0xA7, 0x9B, 0x98, |
| 161 | 0x59, 0xF7, 0x41, 0xE0, 0x82, 0x54, 0x2A, 0x38, 0x55, 0x02, 0xF2, 0x5D, |
| 162 | 0xBF, 0x55, 0x29, 0x6C, 0x3A, 0x54, 0x5E, 0x38, 0x72, 0x76, 0x0A, 0xB7, |
| 163 | /* y */ |
| 164 | 0x36, 0x17, 0xde, 0x4a, 0x96, 0x26, 0x2c, 0x6f, 0x5d, 0x9e, 0x98, 0xbf, |
| 165 | 0x92, 0x92, 0xdc, 0x29, 0xf8, 0xf4, 0x1d, 0xbd, 0x28, 0x9a, 0x14, 0x7c, |
| 166 | 0xe9, 0xda, 0x31, 0x13, 0xb5, 0xf0, 0xb8, 0xc0, 0x0a, 0x60, 0xb1, 0xce, |
| 167 | 0x1d, 0x7e, 0x81, 0x9d, 0x7a, 0x43, 0x1d, 0x7c, 0x90, 0xea, 0x0e, 0x5f, |
| 168 | /* order */ |
| 169 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 170 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 171 | 0xC7, 0x63, 0x4D, 0x81, 0xF4, 0x37, 0x2D, 0xDF, 0x58, 0x1A, 0x0D, 0xB2, |
| 172 | 0x48, 0xB0, 0xA7, 0x7A, 0xEC, 0xEC, 0x19, 0x6A, 0xCC, 0xC5, 0x29, 0x73}}; |
| 173 | |
| 174 | static const struct curve_data P521 = { |
| 175 | "NIST P-521", |
| 176 | 66, |
| 177 | 1, |
| 178 | {/* p */ |
| 179 | 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 180 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 181 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 182 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 183 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 184 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 185 | /* a */ |
| 186 | 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 187 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 188 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 189 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 190 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 191 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, |
| 192 | /* b */ |
| 193 | 0x00, 0x51, 0x95, 0x3E, 0xB9, 0x61, 0x8E, 0x1C, 0x9A, 0x1F, 0x92, 0x9A, |
| 194 | 0x21, 0xA0, 0xB6, 0x85, 0x40, 0xEE, 0xA2, 0xDA, 0x72, 0x5B, 0x99, 0xB3, |
| 195 | 0x15, 0xF3, 0xB8, 0xB4, 0x89, 0x91, 0x8E, 0xF1, 0x09, 0xE1, 0x56, 0x19, |
| 196 | 0x39, 0x51, 0xEC, 0x7E, 0x93, 0x7B, 0x16, 0x52, 0xC0, 0xBD, 0x3B, 0xB1, |
| 197 | 0xBF, 0x07, 0x35, 0x73, 0xDF, 0x88, 0x3D, 0x2C, 0x34, 0xF1, 0xEF, 0x45, |
| 198 | 0x1F, 0xD4, 0x6B, 0x50, 0x3F, 0x00, |
| 199 | /* x */ |
| 200 | 0x00, 0xC6, 0x85, 0x8E, 0x06, 0xB7, 0x04, 0x04, 0xE9, 0xCD, 0x9E, 0x3E, |
| 201 | 0xCB, 0x66, 0x23, 0x95, 0xB4, 0x42, 0x9C, 0x64, 0x81, 0x39, 0x05, 0x3F, |
| 202 | 0xB5, 0x21, 0xF8, 0x28, 0xAF, 0x60, 0x6B, 0x4D, 0x3D, 0xBA, 0xA1, 0x4B, |
| 203 | 0x5E, 0x77, 0xEF, 0xE7, 0x59, 0x28, 0xFE, 0x1D, 0xC1, 0x27, 0xA2, 0xFF, |
| 204 | 0xA8, 0xDE, 0x33, 0x48, 0xB3, 0xC1, 0x85, 0x6A, 0x42, 0x9B, 0xF9, 0x7E, |
| 205 | 0x7E, 0x31, 0xC2, 0xE5, 0xBD, 0x66, |
| 206 | /* y */ |
| 207 | 0x01, 0x18, 0x39, 0x29, 0x6a, 0x78, 0x9a, 0x3b, 0xc0, 0x04, 0x5c, 0x8a, |
| 208 | 0x5f, 0xb4, 0x2c, 0x7d, 0x1b, 0xd9, 0x98, 0xf5, 0x44, 0x49, 0x57, 0x9b, |
| 209 | 0x44, 0x68, 0x17, 0xaf, 0xbd, 0x17, 0x27, 0x3e, 0x66, 0x2c, 0x97, 0xee, |
| 210 | 0x72, 0x99, 0x5e, 0xf4, 0x26, 0x40, 0xc5, 0x50, 0xb9, 0x01, 0x3f, 0xad, |
| 211 | 0x07, 0x61, 0x35, 0x3c, 0x70, 0x86, 0xa2, 0x72, 0xc2, 0x40, 0x88, 0xbe, |
| 212 | 0x94, 0x76, 0x9f, 0xd1, 0x66, 0x50, |
| 213 | /* order */ |
| 214 | 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 215 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 216 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFA, 0x51, 0x86, |
| 217 | 0x87, 0x83, 0xBF, 0x2F, 0x96, 0x6B, 0x7F, 0xCC, 0x01, 0x48, 0xF7, 0x09, |
| 218 | 0xA5, 0xD0, 0x3B, 0xB5, 0xC9, 0xB8, 0x89, 0x9C, 0x47, 0xAE, 0xBB, 0x6F, |
| 219 | 0xB7, 0x1E, 0x91, 0x38, 0x64, 0x09}}; |
| 220 | |
| 221 | const struct built_in_curve OPENSSL_built_in_curves[] = { |
| 222 | {NID_secp224r1, &P224, 0}, |
| 223 | {NID_X9_62_prime256v1, &P256, 0}, |
| 224 | {NID_secp384r1, &P384, 0}, |
| 225 | {NID_secp521r1, &P521, 0}, |
| 226 | {NID_undef, 0, 0}, |
| 227 | }; |
| 228 | |
| 229 | EC_GROUP *ec_group_new(const EC_METHOD *meth) { |
| 230 | EC_GROUP *ret; |
| 231 | |
| 232 | if (meth == NULL) { |
| 233 | OPENSSL_PUT_ERROR(EC, ec_group_new, EC_R_SLOT_FULL); |
| 234 | return NULL; |
| 235 | } |
| 236 | |
| 237 | if (meth->group_init == 0) { |
| 238 | OPENSSL_PUT_ERROR(EC, ec_group_new, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 239 | return NULL; |
| 240 | } |
| 241 | |
| 242 | ret = OPENSSL_malloc(sizeof(EC_GROUP)); |
| 243 | if (ret == NULL) { |
| 244 | OPENSSL_PUT_ERROR(EC, ec_group_new, ERR_R_MALLOC_FAILURE); |
| 245 | return NULL; |
| 246 | } |
| 247 | memset(ret, 0, sizeof(EC_GROUP)); |
| 248 | |
| 249 | ret->meth = meth; |
| 250 | BN_init(&ret->order); |
| 251 | BN_init(&ret->cofactor); |
| 252 | |
| 253 | if (!meth->group_init(ret)) { |
| 254 | OPENSSL_free(ret); |
| 255 | return NULL; |
| 256 | } |
| 257 | |
| 258 | return ret; |
| 259 | } |
| 260 | |
| 261 | static EC_GROUP *ec_group_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, |
| 262 | const BIGNUM *b, BN_CTX *ctx) { |
| 263 | const EC_METHOD *meth = EC_GFp_mont_method(); |
| 264 | EC_GROUP *ret; |
| 265 | |
| 266 | ret = ec_group_new(meth); |
| 267 | if (ret == NULL) { |
| 268 | return NULL; |
| 269 | } |
| 270 | |
| 271 | if (ret->meth->group_set_curve == 0) { |
| 272 | OPENSSL_PUT_ERROR(EC, ec_group_new_curve_GFp, |
| 273 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 274 | return 0; |
| 275 | } |
| 276 | if (!ret->meth->group_set_curve(ret, p, a, b, ctx)) { |
| 277 | EC_GROUP_free(ret); |
| 278 | return NULL; |
| 279 | } |
| 280 | return ret; |
| 281 | } |
| 282 | |
| 283 | static EC_GROUP *ec_group_new_from_data(const struct built_in_curve *curve) { |
| 284 | EC_GROUP *group = NULL; |
| 285 | EC_POINT *P = NULL; |
| 286 | BN_CTX *ctx = NULL; |
| 287 | BIGNUM *p = NULL, *a = NULL, *b = NULL, *x = NULL, *y = NULL, *order = NULL; |
| 288 | int ok = 0; |
| 289 | unsigned param_len; |
| 290 | const EC_METHOD *meth; |
| 291 | const struct curve_data *data; |
| 292 | const uint8_t *params; |
| 293 | |
| 294 | if ((ctx = BN_CTX_new()) == NULL) { |
| 295 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_MALLOC_FAILURE); |
| 296 | goto err; |
| 297 | } |
| 298 | |
| 299 | data = curve->data; |
| 300 | param_len = data->param_len; |
| 301 | params = data->data; |
| 302 | |
| 303 | if (!(p = BN_bin2bn(params + 0 * param_len, param_len, NULL)) || |
| 304 | !(a = BN_bin2bn(params + 1 * param_len, param_len, NULL)) || |
| 305 | !(b = BN_bin2bn(params + 2 * param_len, param_len, NULL))) { |
| 306 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); |
| 307 | goto err; |
| 308 | } |
| 309 | |
| 310 | if (curve->method != 0) { |
| 311 | meth = curve->method(); |
| 312 | if (((group = ec_group_new(meth)) == NULL) || |
| 313 | (!(group->meth->group_set_curve(group, p, a, b, ctx)))) { |
| 314 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); |
| 315 | goto err; |
| 316 | } |
| 317 | } else { |
| 318 | if ((group = ec_group_new_curve_GFp(p, a, b, ctx)) == NULL) { |
| 319 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); |
| 320 | goto err; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | if ((P = EC_POINT_new(group)) == NULL) { |
| 325 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); |
| 326 | goto err; |
| 327 | } |
| 328 | |
| 329 | if (!(x = BN_bin2bn(params + 3 * param_len, param_len, NULL)) || |
| 330 | !(y = BN_bin2bn(params + 4 * param_len, param_len, NULL))) { |
| 331 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); |
| 332 | goto err; |
| 333 | } |
| 334 | |
| 335 | if (!EC_POINT_set_affine_coordinates_GFp(group, P, x, y, ctx)) { |
| 336 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_EC_LIB); |
| 337 | goto err; |
| 338 | } |
| 339 | if (!(order = BN_bin2bn(params + 5 * param_len, param_len, NULL)) || |
| 340 | !BN_set_word(x, (BN_ULONG)data->cofactor)) { |
| 341 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); |
| 342 | goto err; |
| 343 | } |
| 344 | |
| 345 | group->generator = P; |
| 346 | P = NULL; |
| 347 | if (!BN_copy(&group->order, order) || |
| 348 | !BN_set_word(&group->cofactor, (BN_ULONG)data->cofactor)) { |
| 349 | OPENSSL_PUT_ERROR(EC, ec_group_new_from_data, ERR_R_BN_LIB); |
| 350 | goto err; |
| 351 | } |
| 352 | |
| 353 | ok = 1; |
| 354 | |
| 355 | err: |
| 356 | if (!ok) { |
| 357 | EC_GROUP_free(group); |
| 358 | group = NULL; |
| 359 | } |
| 360 | if (P) |
| 361 | EC_POINT_free(P); |
| 362 | if (ctx) |
| 363 | BN_CTX_free(ctx); |
| 364 | if (p) |
| 365 | BN_free(p); |
| 366 | if (a) |
| 367 | BN_free(a); |
| 368 | if (b) |
| 369 | BN_free(b); |
| 370 | if (order) |
| 371 | BN_free(order); |
| 372 | if (x) |
| 373 | BN_free(x); |
| 374 | if (y) |
| 375 | BN_free(y); |
| 376 | return group; |
| 377 | } |
| 378 | |
| 379 | EC_GROUP *EC_GROUP_new_by_curve_name(int nid) { |
| 380 | unsigned i; |
| 381 | const struct built_in_curve *curve; |
| 382 | EC_GROUP *ret = NULL; |
| 383 | |
| 384 | for (i = 0; OPENSSL_built_in_curves[i].nid != NID_undef; i++) { |
| 385 | curve = &OPENSSL_built_in_curves[i]; |
| 386 | if (curve->nid == nid) { |
| 387 | ret = ec_group_new_from_data(curve); |
| 388 | break; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | if (ret == NULL) { |
| 393 | OPENSSL_PUT_ERROR(EC, EC_GROUP_new_by_curve_name, EC_R_UNKNOWN_GROUP); |
| 394 | return NULL; |
| 395 | } |
| 396 | |
| 397 | ret->curve_name = nid; |
| 398 | return ret; |
| 399 | } |
| 400 | |
| 401 | void EC_GROUP_free(EC_GROUP *group) { |
| 402 | if (!group) { |
| 403 | return; |
| 404 | } |
| 405 | |
| 406 | if (group->meth->group_finish != 0) { |
| 407 | group->meth->group_finish(group); |
| 408 | } |
| 409 | |
| 410 | ec_pre_comp_free(group->pre_comp); |
| 411 | |
| 412 | if (group->generator != NULL) { |
| 413 | EC_POINT_free(group->generator); |
| 414 | } |
| 415 | BN_free(&group->order); |
| 416 | BN_free(&group->cofactor); |
| 417 | |
| 418 | OPENSSL_free(group); |
| 419 | } |
| 420 | |
| 421 | int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src) { |
| 422 | if (dest->meth->group_copy == 0) { |
| 423 | OPENSSL_PUT_ERROR(EC, EC_GROUP_copy, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 424 | return 0; |
| 425 | } |
| 426 | if (dest->meth != src->meth) { |
| 427 | OPENSSL_PUT_ERROR(EC, EC_GROUP_copy, EC_R_INCOMPATIBLE_OBJECTS); |
| 428 | return 0; |
| 429 | } |
| 430 | if (dest == src) { |
| 431 | return 1; |
| 432 | } |
| 433 | |
| 434 | ec_pre_comp_free(dest->pre_comp); |
| 435 | dest->pre_comp = ec_pre_comp_dup(src->pre_comp); |
| 436 | |
| 437 | if (src->generator != NULL) { |
| 438 | if (dest->generator == NULL) { |
| 439 | dest->generator = EC_POINT_new(dest); |
| 440 | if (dest->generator == NULL) { |
| 441 | return 0; |
| 442 | } |
| 443 | } |
| 444 | if (!EC_POINT_copy(dest->generator, src->generator)) { |
| 445 | return 0; |
| 446 | } |
| 447 | } else { |
| 448 | /* src->generator == NULL */ |
| 449 | if (dest->generator != NULL) { |
| 450 | EC_POINT_clear_free(dest->generator); |
| 451 | dest->generator = NULL; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | if (!BN_copy(&dest->order, &src->order) || |
| 456 | !BN_copy(&dest->cofactor, &src->cofactor)) { |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | dest->curve_name = src->curve_name; |
| 461 | |
| 462 | return dest->meth->group_copy(dest, src); |
| 463 | } |
| 464 | |
| 465 | EC_GROUP *EC_GROUP_dup(const EC_GROUP *a) { |
| 466 | EC_GROUP *t = NULL; |
| 467 | int ok = 0; |
| 468 | |
| 469 | if (a == NULL) { |
| 470 | return NULL; |
| 471 | } |
| 472 | |
| 473 | t = ec_group_new(a->meth); |
| 474 | if (t == NULL) { |
| 475 | return NULL; |
| 476 | } |
| 477 | if (!EC_GROUP_copy(t, a)) { |
| 478 | goto err; |
| 479 | } |
| 480 | |
| 481 | ok = 1; |
| 482 | |
| 483 | err: |
| 484 | if (!ok) { |
| 485 | if (t) { |
| 486 | EC_GROUP_free(t); |
| 487 | } |
| 488 | return NULL; |
| 489 | } else { |
| 490 | return t; |
| 491 | } |
| 492 | } |
| 493 | |
Kenny Root | c897c7e | 2015-02-27 13:00:38 -0800 | [diff] [blame^] | 494 | int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ignored) { |
Adam Langley | ef93571 | 2015-02-25 11:16:32 -0800 | [diff] [blame] | 495 | return a->curve_name == NID_undef || |
| 496 | b->curve_name == NID_undef || |
| 497 | a->curve_name != b->curve_name; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group) { |
| 501 | return group->generator; |
| 502 | } |
| 503 | |
| 504 | int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx) { |
| 505 | if (!BN_copy(order, &group->order)) { |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | return !BN_is_zero(order); |
| 510 | } |
| 511 | |
| 512 | int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, |
| 513 | BN_CTX *ctx) { |
| 514 | if (!BN_copy(cofactor, &group->cofactor)) { |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | return !BN_is_zero(&group->cofactor); |
| 519 | } |
| 520 | |
| 521 | int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *out_p, BIGNUM *out_a, |
| 522 | BIGNUM *out_b, BN_CTX *ctx) { |
| 523 | if (group->meth->group_get_curve == 0) { |
| 524 | OPENSSL_PUT_ERROR(EC, EC_GROUP_get_curve_GFp, |
| 525 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 526 | return 0; |
| 527 | } |
| 528 | return group->meth->group_get_curve(group, out_p, out_a, out_b, ctx); |
| 529 | } |
| 530 | |
| 531 | int EC_GROUP_get_curve_name(const EC_GROUP *group) { return group->curve_name; } |
| 532 | |
| 533 | int EC_GROUP_get_degree(const EC_GROUP *group) { |
| 534 | if (group->meth->group_get_degree == 0) { |
| 535 | OPENSSL_PUT_ERROR(EC, EC_GROUP_get_degree, |
| 536 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 537 | return 0; |
| 538 | } |
| 539 | return group->meth->group_get_degree(group); |
| 540 | } |
| 541 | |
| 542 | int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx) { |
| 543 | if (group->meth->mul == 0) { |
| 544 | /* use default */ |
| 545 | return ec_wNAF_precompute_mult(group, ctx); |
| 546 | } |
| 547 | |
| 548 | if (group->meth->precompute_mult != 0) { |
| 549 | return group->meth->precompute_mult(group, ctx); |
| 550 | } |
| 551 | |
| 552 | return 1; /* nothing to do, so report success */ |
| 553 | } |
| 554 | |
| 555 | int EC_GROUP_have_precompute_mult(const EC_GROUP *group) { |
| 556 | if (group->meth->mul == 0) { |
| 557 | /* use default */ |
| 558 | return ec_wNAF_have_precompute_mult(group); |
| 559 | } |
| 560 | |
| 561 | if (group->meth->have_precompute_mult != 0) { |
| 562 | return group->meth->have_precompute_mult(group); |
| 563 | } |
| 564 | |
| 565 | return 0; /* cannot tell whether precomputation has been performed */ |
| 566 | } |
| 567 | |
| 568 | EC_POINT *EC_POINT_new(const EC_GROUP *group) { |
| 569 | EC_POINT *ret; |
| 570 | |
| 571 | if (group == NULL) { |
| 572 | OPENSSL_PUT_ERROR(EC, EC_POINT_new, ERR_R_PASSED_NULL_PARAMETER); |
| 573 | return NULL; |
| 574 | } |
| 575 | if (group->meth->point_init == 0) { |
| 576 | OPENSSL_PUT_ERROR(EC, EC_POINT_new, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 577 | return NULL; |
| 578 | } |
| 579 | |
| 580 | ret = OPENSSL_malloc(sizeof *ret); |
| 581 | if (ret == NULL) { |
| 582 | OPENSSL_PUT_ERROR(EC, EC_POINT_new, ERR_R_MALLOC_FAILURE); |
| 583 | return NULL; |
| 584 | } |
| 585 | |
| 586 | ret->meth = group->meth; |
| 587 | |
| 588 | if (!ret->meth->point_init(ret)) { |
| 589 | OPENSSL_free(ret); |
| 590 | return NULL; |
| 591 | } |
| 592 | |
| 593 | return ret; |
| 594 | } |
| 595 | |
| 596 | void EC_POINT_free(EC_POINT *point) { |
| 597 | if (!point) { |
| 598 | return; |
| 599 | } |
| 600 | |
| 601 | if (point->meth->point_finish != 0) { |
| 602 | point->meth->point_finish(point); |
| 603 | } |
| 604 | OPENSSL_free(point); |
| 605 | } |
| 606 | |
| 607 | void EC_POINT_clear_free(EC_POINT *point) { |
| 608 | if (!point) { |
| 609 | return; |
| 610 | } |
| 611 | |
| 612 | if (point->meth->point_clear_finish != 0) { |
| 613 | point->meth->point_clear_finish(point); |
| 614 | } else if (point->meth->point_finish != 0) { |
| 615 | point->meth->point_finish(point); |
| 616 | } |
| 617 | OPENSSL_cleanse(point, sizeof *point); |
| 618 | OPENSSL_free(point); |
| 619 | } |
| 620 | |
| 621 | int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) { |
| 622 | if (dest->meth->point_copy == 0) { |
| 623 | OPENSSL_PUT_ERROR(EC, EC_POINT_copy, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 624 | return 0; |
| 625 | } |
| 626 | if (dest->meth != src->meth) { |
| 627 | OPENSSL_PUT_ERROR(EC, EC_POINT_copy, EC_R_INCOMPATIBLE_OBJECTS); |
| 628 | return 0; |
| 629 | } |
| 630 | if (dest == src) { |
| 631 | return 1; |
| 632 | } |
| 633 | return dest->meth->point_copy(dest, src); |
| 634 | } |
| 635 | |
| 636 | EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group) { |
| 637 | EC_POINT *t; |
| 638 | int r; |
| 639 | |
| 640 | if (a == NULL) { |
| 641 | return NULL; |
| 642 | } |
| 643 | |
| 644 | t = EC_POINT_new(group); |
| 645 | if (t == NULL) { |
| 646 | OPENSSL_PUT_ERROR(EC, EC_POINT_dup, ERR_R_MALLOC_FAILURE); |
| 647 | return NULL; |
| 648 | } |
| 649 | r = EC_POINT_copy(t, a); |
| 650 | if (!r) { |
| 651 | EC_POINT_free(t); |
| 652 | return NULL; |
| 653 | } else { |
| 654 | return t; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | int EC_POINT_set_to_infinity(const EC_GROUP *group, EC_POINT *point) { |
| 659 | if (group->meth->point_set_to_infinity == 0) { |
| 660 | OPENSSL_PUT_ERROR(EC, EC_POINT_set_to_infinity, |
| 661 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 662 | return 0; |
| 663 | } |
| 664 | if (group->meth != point->meth) { |
| 665 | OPENSSL_PUT_ERROR(EC, EC_POINT_set_to_infinity, EC_R_INCOMPATIBLE_OBJECTS); |
| 666 | return 0; |
| 667 | } |
| 668 | return group->meth->point_set_to_infinity(group, point); |
| 669 | } |
| 670 | |
| 671 | int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) { |
| 672 | if (group->meth->is_at_infinity == 0) { |
| 673 | OPENSSL_PUT_ERROR(EC, EC_POINT_is_at_infinity, |
| 674 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 675 | return 0; |
| 676 | } |
| 677 | if (group->meth != point->meth) { |
| 678 | OPENSSL_PUT_ERROR(EC, EC_POINT_is_at_infinity, EC_R_INCOMPATIBLE_OBJECTS); |
| 679 | return 0; |
| 680 | } |
| 681 | return group->meth->is_at_infinity(group, point); |
| 682 | } |
| 683 | |
| 684 | int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, |
| 685 | BN_CTX *ctx) { |
| 686 | if (group->meth->is_on_curve == 0) { |
| 687 | OPENSSL_PUT_ERROR(EC, EC_POINT_is_on_curve, |
| 688 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 689 | return 0; |
| 690 | } |
| 691 | if (group->meth != point->meth) { |
| 692 | OPENSSL_PUT_ERROR(EC, EC_POINT_is_on_curve, EC_R_INCOMPATIBLE_OBJECTS); |
| 693 | return 0; |
| 694 | } |
| 695 | return group->meth->is_on_curve(group, point, ctx); |
| 696 | } |
| 697 | |
| 698 | int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, |
| 699 | BN_CTX *ctx) { |
| 700 | if (group->meth->point_cmp == 0) { |
| 701 | OPENSSL_PUT_ERROR(EC, EC_POINT_cmp, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 702 | return -1; |
| 703 | } |
| 704 | if ((group->meth != a->meth) || (a->meth != b->meth)) { |
| 705 | OPENSSL_PUT_ERROR(EC, EC_POINT_cmp, EC_R_INCOMPATIBLE_OBJECTS); |
| 706 | return -1; |
| 707 | } |
| 708 | return group->meth->point_cmp(group, a, b, ctx); |
| 709 | } |
| 710 | |
| 711 | int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) { |
| 712 | if (group->meth->make_affine == 0) { |
| 713 | OPENSSL_PUT_ERROR(EC, EC_POINT_make_affine, |
| 714 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 715 | return 0; |
| 716 | } |
| 717 | if (group->meth != point->meth) { |
| 718 | OPENSSL_PUT_ERROR(EC, EC_POINT_make_affine, EC_R_INCOMPATIBLE_OBJECTS); |
| 719 | return 0; |
| 720 | } |
| 721 | return group->meth->make_affine(group, point, ctx); |
| 722 | } |
| 723 | |
| 724 | int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, EC_POINT *points[], |
| 725 | BN_CTX *ctx) { |
| 726 | size_t i; |
| 727 | |
| 728 | if (group->meth->points_make_affine == 0) { |
| 729 | OPENSSL_PUT_ERROR(EC, EC_POINTs_make_affine, |
| 730 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 731 | return 0; |
| 732 | } |
| 733 | for (i = 0; i < num; i++) { |
| 734 | if (group->meth != points[i]->meth) { |
| 735 | OPENSSL_PUT_ERROR(EC, EC_POINTs_make_affine, EC_R_INCOMPATIBLE_OBJECTS); |
| 736 | return 0; |
| 737 | } |
| 738 | } |
| 739 | return group->meth->points_make_affine(group, num, points, ctx); |
| 740 | } |
| 741 | |
| 742 | int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, |
| 743 | const EC_POINT *point, BIGNUM *x, |
| 744 | BIGNUM *y, BN_CTX *ctx) { |
| 745 | if (group->meth->point_get_affine_coordinates == 0) { |
| 746 | OPENSSL_PUT_ERROR(EC, EC_POINT_get_affine_coordinates_GFp, |
| 747 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 748 | return 0; |
| 749 | } |
| 750 | if (group->meth != point->meth) { |
| 751 | OPENSSL_PUT_ERROR(EC, EC_POINT_get_affine_coordinates_GFp, |
| 752 | EC_R_INCOMPATIBLE_OBJECTS); |
| 753 | return 0; |
| 754 | } |
| 755 | return group->meth->point_get_affine_coordinates(group, point, x, y, ctx); |
| 756 | } |
| 757 | |
| 758 | int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
| 759 | const BIGNUM *x, const BIGNUM *y, |
| 760 | BN_CTX *ctx) { |
| 761 | if (group->meth->point_set_affine_coordinates == 0) { |
| 762 | OPENSSL_PUT_ERROR(EC, EC_POINT_set_affine_coordinates_GFp, |
| 763 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 764 | return 0; |
| 765 | } |
| 766 | if (group->meth != point->meth) { |
| 767 | OPENSSL_PUT_ERROR(EC, EC_POINT_set_affine_coordinates_GFp, |
| 768 | EC_R_INCOMPATIBLE_OBJECTS); |
| 769 | return 0; |
| 770 | } |
| 771 | return group->meth->point_set_affine_coordinates(group, point, x, y, ctx); |
| 772 | } |
| 773 | |
| 774 | int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
| 775 | const EC_POINT *b, BN_CTX *ctx) { |
| 776 | if (group->meth->add == 0) { |
| 777 | OPENSSL_PUT_ERROR(EC, EC_POINT_add, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 778 | return 0; |
| 779 | } |
| 780 | if ((group->meth != r->meth) || (r->meth != a->meth) || |
| 781 | (a->meth != b->meth)) { |
| 782 | OPENSSL_PUT_ERROR(EC, EC_POINT_add, EC_R_INCOMPATIBLE_OBJECTS); |
| 783 | return 0; |
| 784 | } |
| 785 | return group->meth->add(group, r, a, b, ctx); |
| 786 | } |
| 787 | |
| 788 | |
| 789 | int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, |
| 790 | BN_CTX *ctx) { |
| 791 | if (group->meth->dbl == 0) { |
| 792 | OPENSSL_PUT_ERROR(EC, EC_POINT_dbl, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 793 | return 0; |
| 794 | } |
| 795 | if ((group->meth != r->meth) || (r->meth != a->meth)) { |
| 796 | OPENSSL_PUT_ERROR(EC, EC_POINT_dbl, EC_R_INCOMPATIBLE_OBJECTS); |
| 797 | return 0; |
| 798 | } |
| 799 | return group->meth->dbl(group, r, a, ctx); |
| 800 | } |
| 801 | |
| 802 | |
| 803 | int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) { |
| 804 | if (group->meth->invert == 0) { |
| 805 | OPENSSL_PUT_ERROR(EC, EC_POINT_invert, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 806 | return 0; |
| 807 | } |
| 808 | if (group->meth != a->meth) { |
| 809 | OPENSSL_PUT_ERROR(EC, EC_POINT_invert, EC_R_INCOMPATIBLE_OBJECTS); |
| 810 | return 0; |
| 811 | } |
| 812 | return group->meth->invert(group, a, ctx); |
| 813 | } |
| 814 | |
| 815 | int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar, |
| 816 | const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx) { |
| 817 | /* just a convenient interface to EC_POINTs_mul() */ |
| 818 | |
| 819 | const EC_POINT *points[1]; |
| 820 | const BIGNUM *scalars[1]; |
| 821 | |
| 822 | points[0] = point; |
| 823 | scalars[0] = p_scalar; |
| 824 | |
| 825 | return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), |
| 826 | points, scalars, ctx); |
| 827 | } |
| 828 | |
| 829 | int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, |
| 830 | size_t num, const EC_POINT *points[], const BIGNUM *scalars[], |
| 831 | BN_CTX *ctx) { |
| 832 | if (group->meth->mul == 0) { |
| 833 | /* use default. Warning, not constant-time. */ |
| 834 | return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx); |
| 835 | } |
| 836 | |
| 837 | return group->meth->mul(group, r, scalar, num, points, scalars, ctx); |
| 838 | } |
| 839 | |
| 840 | int ec_point_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point, |
| 841 | const BIGNUM *x, const BIGNUM *y, |
| 842 | const BIGNUM *z, BN_CTX *ctx) { |
| 843 | if (group->meth->point_set_Jprojective_coordinates_GFp == 0) { |
| 844 | OPENSSL_PUT_ERROR(EC, ec_point_set_Jprojective_coordinates_GFp, |
| 845 | ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); |
| 846 | return 0; |
| 847 | } |
| 848 | if (group->meth != point->meth) { |
| 849 | OPENSSL_PUT_ERROR(EC, ec_point_set_Jprojective_coordinates_GFp, |
| 850 | EC_R_INCOMPATIBLE_OBJECTS); |
| 851 | return 0; |
| 852 | } |
| 853 | return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, |
| 854 | z, ctx); |
| 855 | } |