Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/ecdh/ech_lib.c */ |
| 2 | /* ==================================================================== |
| 3 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 4 | * |
| 5 | * The Elliptic Curve Public-Key Crypto Library (ECC Code) included |
| 6 | * herein is developed by SUN MICROSYSTEMS, INC., and is contributed |
| 7 | * to the OpenSSL project. |
| 8 | * |
| 9 | * The ECC Code is licensed pursuant to the OpenSSL open source |
| 10 | * license provided below. |
| 11 | * |
| 12 | * The ECDH software is originally written by Douglas Stebila of |
| 13 | * Sun Microsystems Laboratories. |
| 14 | * |
| 15 | */ |
| 16 | /* ==================================================================== |
| 17 | * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
| 18 | * |
| 19 | * Redistribution and use in source and binary forms, with or without |
| 20 | * modification, are permitted provided that the following conditions |
| 21 | * are met: |
| 22 | * |
| 23 | * 1. Redistributions of source code must retain the above copyright |
| 24 | * notice, this list of conditions and the following disclaimer. |
| 25 | * |
| 26 | * 2. Redistributions in binary form must reproduce the above copyright |
| 27 | * notice, this list of conditions and the following disclaimer in |
| 28 | * the documentation and/or other materials provided with the |
| 29 | * distribution. |
| 30 | * |
| 31 | * 3. All advertising materials mentioning features or use of this |
| 32 | * software must display the following acknowledgment: |
| 33 | * "This product includes software developed by the OpenSSL Project |
| 34 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 35 | * |
| 36 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 37 | * endorse or promote products derived from this software without |
| 38 | * prior written permission. For written permission, please contact |
| 39 | * openssl-core@OpenSSL.org. |
| 40 | * |
| 41 | * 5. Products derived from this software may not be called "OpenSSL" |
| 42 | * nor may "OpenSSL" appear in their names without prior written |
| 43 | * permission of the OpenSSL Project. |
| 44 | * |
| 45 | * 6. Redistributions of any form whatsoever must retain the following |
| 46 | * acknowledgment: |
| 47 | * "This product includes software developed by the OpenSSL Project |
| 48 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 49 | * |
| 50 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 51 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 52 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 53 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 54 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 56 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 57 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 58 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 59 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 60 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 61 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 62 | * ==================================================================== |
| 63 | * |
| 64 | * This product includes cryptographic software written by Eric Young |
| 65 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 66 | * Hudson (tjh@cryptsoft.com). |
| 67 | * |
| 68 | */ |
| 69 | |
| 70 | #include "ech_locl.h" |
| 71 | #include <string.h> |
| 72 | #ifndef OPENSSL_NO_ENGINE |
| 73 | #include <openssl/engine.h> |
| 74 | #endif |
| 75 | #include <openssl/err.h> |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 76 | |
| 77 | const char ECDH_version[]="ECDH" OPENSSL_VERSION_PTEXT; |
| 78 | |
| 79 | static const ECDH_METHOD *default_ECDH_method = NULL; |
| 80 | |
| 81 | static void *ecdh_data_new(void); |
| 82 | static void *ecdh_data_dup(void *); |
| 83 | static void ecdh_data_free(void *); |
| 84 | |
| 85 | void ECDH_set_default_method(const ECDH_METHOD *meth) |
| 86 | { |
| 87 | default_ECDH_method = meth; |
| 88 | } |
| 89 | |
| 90 | const ECDH_METHOD *ECDH_get_default_method(void) |
| 91 | { |
| 92 | if(!default_ECDH_method) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 93 | default_ECDH_method = ECDH_OpenSSL(); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 94 | return default_ECDH_method; |
| 95 | } |
| 96 | |
| 97 | int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth) |
| 98 | { |
| 99 | ECDH_DATA *ecdh; |
| 100 | |
| 101 | ecdh = ecdh_check(eckey); |
| 102 | |
| 103 | if (ecdh == NULL) |
| 104 | return 0; |
| 105 | |
| 106 | #if 0 |
| 107 | mtmp = ecdh->meth; |
| 108 | if (mtmp->finish) |
| 109 | mtmp->finish(eckey); |
| 110 | #endif |
| 111 | #ifndef OPENSSL_NO_ENGINE |
| 112 | if (ecdh->engine) |
| 113 | { |
| 114 | ENGINE_finish(ecdh->engine); |
| 115 | ecdh->engine = NULL; |
| 116 | } |
| 117 | #endif |
| 118 | ecdh->meth = meth; |
| 119 | #if 0 |
| 120 | if (meth->init) |
| 121 | meth->init(eckey); |
| 122 | #endif |
| 123 | return 1; |
| 124 | } |
| 125 | |
| 126 | static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine) |
| 127 | { |
| 128 | ECDH_DATA *ret; |
| 129 | |
| 130 | ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA)); |
| 131 | if (ret == NULL) |
| 132 | { |
| 133 | ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); |
| 134 | return(NULL); |
| 135 | } |
| 136 | |
| 137 | ret->init = NULL; |
| 138 | |
| 139 | ret->meth = ECDH_get_default_method(); |
| 140 | ret->engine = engine; |
| 141 | #ifndef OPENSSL_NO_ENGINE |
| 142 | if (!ret->engine) |
| 143 | ret->engine = ENGINE_get_default_ECDH(); |
| 144 | if (ret->engine) |
| 145 | { |
| 146 | ret->meth = ENGINE_get_ECDH(ret->engine); |
| 147 | if (!ret->meth) |
| 148 | { |
| 149 | ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB); |
| 150 | ENGINE_finish(ret->engine); |
| 151 | OPENSSL_free(ret); |
| 152 | return NULL; |
| 153 | } |
| 154 | } |
| 155 | #endif |
| 156 | |
| 157 | ret->flags = ret->meth->flags; |
| 158 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); |
| 159 | #if 0 |
| 160 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) |
| 161 | { |
| 162 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); |
| 163 | OPENSSL_free(ret); |
| 164 | ret=NULL; |
| 165 | } |
| 166 | #endif |
| 167 | return(ret); |
| 168 | } |
| 169 | |
| 170 | static void *ecdh_data_new(void) |
| 171 | { |
| 172 | return (void *)ECDH_DATA_new_method(NULL); |
| 173 | } |
| 174 | |
| 175 | static void *ecdh_data_dup(void *data) |
| 176 | { |
| 177 | ECDH_DATA *r = (ECDH_DATA *)data; |
| 178 | |
| 179 | /* XXX: dummy operation */ |
| 180 | if (r == NULL) |
| 181 | return NULL; |
| 182 | |
| 183 | return (void *)ecdh_data_new(); |
| 184 | } |
| 185 | |
| 186 | void ecdh_data_free(void *data) |
| 187 | { |
| 188 | ECDH_DATA *r = (ECDH_DATA *)data; |
| 189 | |
| 190 | #ifndef OPENSSL_NO_ENGINE |
| 191 | if (r->engine) |
| 192 | ENGINE_finish(r->engine); |
| 193 | #endif |
| 194 | |
| 195 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data); |
| 196 | |
| 197 | OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA)); |
| 198 | |
| 199 | OPENSSL_free(r); |
| 200 | } |
| 201 | |
| 202 | ECDH_DATA *ecdh_check(EC_KEY *key) |
| 203 | { |
| 204 | ECDH_DATA *ecdh_data; |
| 205 | |
| 206 | void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup, |
| 207 | ecdh_data_free, ecdh_data_free); |
| 208 | if (data == NULL) |
| 209 | { |
| 210 | ecdh_data = (ECDH_DATA *)ecdh_data_new(); |
| 211 | if (ecdh_data == NULL) |
| 212 | return NULL; |
| 213 | EC_KEY_insert_key_method_data(key, (void *)ecdh_data, |
| 214 | ecdh_data_dup, ecdh_data_free, ecdh_data_free); |
| 215 | } |
| 216 | else |
| 217 | ecdh_data = (ECDH_DATA *)data; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 218 | |
| 219 | |
| 220 | return ecdh_data; |
| 221 | } |
| 222 | |
| 223 | int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
| 224 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
| 225 | { |
| 226 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp, |
| 227 | new_func, dup_func, free_func); |
| 228 | } |
| 229 | |
| 230 | int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg) |
| 231 | { |
| 232 | ECDH_DATA *ecdh; |
| 233 | ecdh = ecdh_check(d); |
| 234 | if (ecdh == NULL) |
| 235 | return 0; |
| 236 | return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg)); |
| 237 | } |
| 238 | |
| 239 | void *ECDH_get_ex_data(EC_KEY *d, int idx) |
| 240 | { |
| 241 | ECDH_DATA *ecdh; |
| 242 | ecdh = ecdh_check(d); |
| 243 | if (ecdh == NULL) |
| 244 | return NULL; |
| 245 | return(CRYPTO_get_ex_data(&ecdh->ex_data,idx)); |
| 246 | } |