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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 66 * Hudson (tjh (at) 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> 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) 93 default_ECDH_method = ECDH_OpenSSL(); 94 return default_ECDH_method; 95 } 96 97 int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth) 98 { 99 const ECDH_METHOD *mtmp; 100 ECDH_DATA *ecdh; 101 102 ecdh = ecdh_check(eckey); 103 104 if (ecdh == NULL) 105 return 0; 106 107 mtmp = ecdh->meth; 108 #if 0 109 if (mtmp->finish) 110 mtmp->finish(eckey); 111 #endif 112 #ifndef OPENSSL_NO_ENGINE 113 if (ecdh->engine) 114 { 115 ENGINE_finish(ecdh->engine); 116 ecdh->engine = NULL; 117 } 118 #endif 119 ecdh->meth = meth; 120 #if 0 121 if (meth->init) 122 meth->init(eckey); 123 #endif 124 return 1; 125 } 126 127 static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine) 128 { 129 ECDH_DATA *ret; 130 131 ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA)); 132 if (ret == NULL) 133 { 134 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); 135 return(NULL); 136 } 137 138 ret->init = NULL; 139 140 ret->meth = ECDH_get_default_method(); 141 ret->engine = engine; 142 #ifndef OPENSSL_NO_ENGINE 143 if (!ret->engine) 144 ret->engine = ENGINE_get_default_ECDH(); 145 if (ret->engine) 146 { 147 ret->meth = ENGINE_get_ECDH(ret->engine); 148 if (!ret->meth) 149 { 150 ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB); 151 ENGINE_finish(ret->engine); 152 OPENSSL_free(ret); 153 return NULL; 154 } 155 } 156 #endif 157 158 ret->flags = ret->meth->flags; 159 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); 160 #if 0 161 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) 162 { 163 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); 164 OPENSSL_free(ret); 165 ret=NULL; 166 } 167 #endif 168 return(ret); 169 } 170 171 static void *ecdh_data_new(void) 172 { 173 return (void *)ECDH_DATA_new_method(NULL); 174 } 175 176 static void *ecdh_data_dup(void *data) 177 { 178 ECDH_DATA *r = (ECDH_DATA *)data; 179 180 /* XXX: dummy operation */ 181 if (r == NULL) 182 return NULL; 183 184 return (void *)ecdh_data_new(); 185 } 186 187 void ecdh_data_free(void *data) 188 { 189 ECDH_DATA *r = (ECDH_DATA *)data; 190 191 #ifndef OPENSSL_NO_ENGINE 192 if (r->engine) 193 ENGINE_finish(r->engine); 194 #endif 195 196 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data); 197 198 OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA)); 199 200 OPENSSL_free(r); 201 } 202 203 ECDH_DATA *ecdh_check(EC_KEY *key) 204 { 205 ECDH_DATA *ecdh_data; 206 207 void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup, 208 ecdh_data_free, ecdh_data_free); 209 if (data == NULL) 210 { 211 ecdh_data = (ECDH_DATA *)ecdh_data_new(); 212 if (ecdh_data == NULL) 213 return NULL; 214 EC_KEY_insert_key_method_data(key, (void *)ecdh_data, 215 ecdh_data_dup, ecdh_data_free, ecdh_data_free); 216 } 217 else 218 ecdh_data = (ECDH_DATA *)data; 219 220 221 return ecdh_data; 222 } 223 224 int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 225 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 226 { 227 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp, 228 new_func, dup_func, free_func); 229 } 230 231 int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg) 232 { 233 ECDH_DATA *ecdh; 234 ecdh = ecdh_check(d); 235 if (ecdh == NULL) 236 return 0; 237 return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg)); 238 } 239 240 void *ECDH_get_ex_data(EC_KEY *d, int idx) 241 { 242 ECDH_DATA *ecdh; 243 ecdh = ecdh_check(d); 244 if (ecdh == NULL) 245 return NULL; 246 return(CRYPTO_get_ex_data(&ecdh->ex_data,idx)); 247 } 248
