1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay@cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] 56 */ 57/* ==================================================================== 58 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. 59 * 60 * Redistribution and use in source and binary forms, with or without 61 * modification, are permitted provided that the following conditions 62 * are met: 63 * 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in 69 * the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3. All advertising materials mentioning features or use of this 73 * software must display the following acknowledgment: 74 * "This product includes software developed by the OpenSSL Project 75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 76 * 77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 78 * endorse or promote products derived from this software without 79 * prior written permission. For written permission, please contact 80 * openssl-core@openssl.org. 81 * 82 * 5. Products derived from this software may not be called "OpenSSL" 83 * nor may "OpenSSL" appear in their names without prior written 84 * permission of the OpenSSL Project. 85 * 86 * 6. Redistributions of any form whatsoever must retain the following 87 * acknowledgment: 88 * "This product includes software developed by the OpenSSL Project 89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 102 * OF THE POSSIBILITY OF SUCH DAMAGE. 103 * ==================================================================== 104 * 105 * This product includes cryptographic software written by Eric Young 106 * (eay@cryptsoft.com). This product includes software written by Tim 107 * Hudson (tjh@cryptsoft.com). */ 108 109#include <openssl/ex_data.h> 110 111#include <openssl/err.h> 112#include <openssl/thread.h> 113 114#include "crypto_error.h" 115#include "internal.h" 116 117 118/* global_impl is the implementation that we use at runtime. */ 119static const CRYPTO_EX_DATA_IMPL *global_impl = NULL; 120 121/* ex_data_default_impl is a the default implementation, defined in 122 * ex_data_impl.c. */ 123extern const CRYPTO_EX_DATA_IMPL ex_data_default_impl; 124 125/* get_impl returns the current ex_data implementatation. */ 126static const CRYPTO_EX_DATA_IMPL *get_impl(void) { 127 const CRYPTO_EX_DATA_IMPL *impl; 128 129 CRYPTO_r_lock(CRYPTO_LOCK_EX_DATA); 130 impl = global_impl; 131 CRYPTO_r_unlock(CRYPTO_LOCK_EX_DATA); 132 133 if (impl != NULL) { 134 return impl; 135 } 136 137 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 138 if (global_impl == NULL) { 139 global_impl = &ex_data_default_impl; 140 } 141 impl = global_impl; 142 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 143 return impl; 144} 145 146int CRYPTO_get_ex_new_index(int class_value, long argl, void *argp, 147 CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, 148 CRYPTO_EX_free *free_func) { 149 const CRYPTO_EX_DATA_IMPL *const impl = get_impl(); 150 return impl->get_new_index(class_value, argl, argp, new_func, dup_func, 151 free_func); 152} 153 154int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int index, void *val) { 155 int n, i; 156 157 if (ad->sk == NULL) { 158 ad->sk = sk_void_new_null(); 159 if (ad->sk == NULL) { 160 OPENSSL_PUT_ERROR(CRYPTO, CRYPTO_set_ex_data, ERR_R_MALLOC_FAILURE); 161 return 0; 162 } 163 } 164 165 n = sk_void_num(ad->sk); 166 167 /* Add NULL values until the stack is long enough. */ 168 for (i = n; i <= index; i++) { 169 if (!sk_void_push(ad->sk, NULL)) { 170 OPENSSL_PUT_ERROR(CRYPTO, CRYPTO_set_ex_data, ERR_R_MALLOC_FAILURE); 171 return 0; 172 } 173 } 174 175 sk_void_set(ad->sk, index, val); 176 return 1; 177} 178 179void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx) { 180 if (ad->sk == NULL || idx >= sk_void_num(ad->sk)) { 181 return NULL; 182 } 183 return sk_void_value(ad->sk, idx); 184} 185 186int CRYPTO_ex_data_new_class(void) { 187 const CRYPTO_EX_DATA_IMPL *const impl = get_impl(); 188 return impl->new_class(); 189} 190 191int CRYPTO_new_ex_data(int class_value, void *obj, CRYPTO_EX_DATA *ad) { 192 const CRYPTO_EX_DATA_IMPL *const impl = get_impl(); 193 return impl->new_ex_data(class_value, obj, ad); 194} 195 196int CRYPTO_dup_ex_data(int class_value, CRYPTO_EX_DATA *to, 197 const CRYPTO_EX_DATA *from) { 198 const CRYPTO_EX_DATA_IMPL *const impl = get_impl(); 199 return impl->dup_ex_data(class_value, to, from); 200} 201 202void CRYPTO_free_ex_data(int class_value, void *obj, CRYPTO_EX_DATA *ad) { 203 const CRYPTO_EX_DATA_IMPL *const impl = get_impl(); 204 impl->free_ex_data(class_value, obj, ad); 205} 206 207const CRYPTO_EX_DATA_IMPL *CRYPTO_get_ex_data_implementation(void) { 208 return get_impl(); 209} 210 211int CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *impl) { 212 int ret = 0; 213 214 CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA); 215 if (global_impl == NULL) { 216 ret = 1; 217 global_impl = impl; 218 } 219 CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA); 220 221 return ret; 222} 223 224void CRYPTO_cleanup_all_ex_data(void) { 225 const CRYPTO_EX_DATA_IMPL *const impl = get_impl(); 226 impl->cleanup(); 227} 228