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 <assert.h>
112 #include <string.h>
113
114 #include <openssl/crypto.h>
115 #include <openssl/err.h>
116 #include <openssl/lhash.h>
117 #include <openssl/mem.h>
118 #include <openssl/stack.h>
119 #include <openssl/thread.h>
120
121 #include "internal.h"
122
123
124 struct crypto_ex_data_func_st {
125 long argl; /* Arbitary long */
126 void *argp; /* Arbitary void pointer */
127 CRYPTO_EX_free *free_func;
128 CRYPTO_EX_dup *dup_func;
129 };
130
CRYPTO_get_ex_new_index(CRYPTO_EX_DATA_CLASS * ex_data_class,int * out_index,long argl,void * argp,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)131 int CRYPTO_get_ex_new_index(CRYPTO_EX_DATA_CLASS *ex_data_class, int *out_index,
132 long argl, void *argp, CRYPTO_EX_dup *dup_func,
133 CRYPTO_EX_free *free_func) {
134 CRYPTO_EX_DATA_FUNCS *funcs;
135 int ret = 0;
136
137 funcs = OPENSSL_malloc(sizeof(CRYPTO_EX_DATA_FUNCS));
138 if (funcs == NULL) {
139 OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE);
140 return 0;
141 }
142
143 funcs->argl = argl;
144 funcs->argp = argp;
145 funcs->dup_func = dup_func;
146 funcs->free_func = free_func;
147
148 CRYPTO_STATIC_MUTEX_lock_write(&ex_data_class->lock);
149
150 if (ex_data_class->meth == NULL) {
151 ex_data_class->meth = sk_CRYPTO_EX_DATA_FUNCS_new_null();
152 }
153
154 if (ex_data_class->meth == NULL ||
155 !sk_CRYPTO_EX_DATA_FUNCS_push(ex_data_class->meth, funcs)) {
156 OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE);
157 OPENSSL_free(funcs);
158 goto err;
159 }
160
161 *out_index = sk_CRYPTO_EX_DATA_FUNCS_num(ex_data_class->meth) - 1 +
162 ex_data_class->num_reserved;
163 ret = 1;
164
165 err:
166 CRYPTO_STATIC_MUTEX_unlock(&ex_data_class->lock);
167 return ret;
168 }
169
CRYPTO_set_ex_data(CRYPTO_EX_DATA * ad,int index,void * val)170 int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int index, void *val) {
171 int n, i;
172
173 if (ad->sk == NULL) {
174 ad->sk = sk_void_new_null();
175 if (ad->sk == NULL) {
176 OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE);
177 return 0;
178 }
179 }
180
181 n = sk_void_num(ad->sk);
182
183 /* Add NULL values until the stack is long enough. */
184 for (i = n; i <= index; i++) {
185 if (!sk_void_push(ad->sk, NULL)) {
186 OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE);
187 return 0;
188 }
189 }
190
191 sk_void_set(ad->sk, index, val);
192 return 1;
193 }
194
CRYPTO_get_ex_data(const CRYPTO_EX_DATA * ad,int idx)195 void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx) {
196 if (ad->sk == NULL || idx < 0 || (size_t)idx >= sk_void_num(ad->sk)) {
197 return NULL;
198 }
199 return sk_void_value(ad->sk, idx);
200 }
201
202 /* get_func_pointers takes a copy of the CRYPTO_EX_DATA_FUNCS pointers, if any,
203 * for the given class. If there are some pointers, it sets |*out| to point to
204 * a fresh stack of them. Otherwise it sets |*out| to NULL. It returns one on
205 * success or zero on error. */
get_func_pointers(STACK_OF (CRYPTO_EX_DATA_FUNCS)** out,CRYPTO_EX_DATA_CLASS * ex_data_class)206 static int get_func_pointers(STACK_OF(CRYPTO_EX_DATA_FUNCS) **out,
207 CRYPTO_EX_DATA_CLASS *ex_data_class) {
208 size_t n;
209
210 *out = NULL;
211
212 /* CRYPTO_EX_DATA_FUNCS structures are static once set, so we can take a
213 * shallow copy of the list under lock and then use the structures without
214 * the lock held. */
215 CRYPTO_STATIC_MUTEX_lock_read(&ex_data_class->lock);
216 n = sk_CRYPTO_EX_DATA_FUNCS_num(ex_data_class->meth);
217 if (n > 0) {
218 *out = sk_CRYPTO_EX_DATA_FUNCS_dup(ex_data_class->meth);
219 }
220 CRYPTO_STATIC_MUTEX_unlock(&ex_data_class->lock);
221
222 if (n > 0 && *out == NULL) {
223 OPENSSL_PUT_ERROR(CRYPTO, ERR_R_MALLOC_FAILURE);
224 return 0;
225 }
226
227 return 1;
228 }
229
CRYPTO_new_ex_data(CRYPTO_EX_DATA * ad)230 void CRYPTO_new_ex_data(CRYPTO_EX_DATA *ad) {
231 ad->sk = NULL;
232 }
233
CRYPTO_dup_ex_data(CRYPTO_EX_DATA_CLASS * ex_data_class,CRYPTO_EX_DATA * to,const CRYPTO_EX_DATA * from)234 int CRYPTO_dup_ex_data(CRYPTO_EX_DATA_CLASS *ex_data_class, CRYPTO_EX_DATA *to,
235 const CRYPTO_EX_DATA *from) {
236 if (from->sk == NULL) {
237 /* In this case, |from| is blank, which is also the initial state of |to|,
238 * so there's nothing to do. */
239 return 1;
240 }
241
242 STACK_OF(CRYPTO_EX_DATA_FUNCS) *func_pointers;
243 if (!get_func_pointers(&func_pointers, ex_data_class)) {
244 return 0;
245 }
246
247 size_t i;
248 for (i = 0; i < sk_CRYPTO_EX_DATA_FUNCS_num(func_pointers); i++) {
249 CRYPTO_EX_DATA_FUNCS *func_pointer =
250 sk_CRYPTO_EX_DATA_FUNCS_value(func_pointers, i);
251 void *ptr = CRYPTO_get_ex_data(from, i + ex_data_class->num_reserved);
252 if (func_pointer->dup_func) {
253 func_pointer->dup_func(to, from, &ptr, i + ex_data_class->num_reserved,
254 func_pointer->argl, func_pointer->argp);
255 }
256 CRYPTO_set_ex_data(to, i + ex_data_class->num_reserved, ptr);
257 }
258
259 sk_CRYPTO_EX_DATA_FUNCS_free(func_pointers);
260
261 return 1;
262 }
263
CRYPTO_free_ex_data(CRYPTO_EX_DATA_CLASS * ex_data_class,void * obj,CRYPTO_EX_DATA * ad)264 void CRYPTO_free_ex_data(CRYPTO_EX_DATA_CLASS *ex_data_class, void *obj,
265 CRYPTO_EX_DATA *ad) {
266 if (ad->sk == NULL) {
267 /* Nothing to do. */
268 return;
269 }
270
271 STACK_OF(CRYPTO_EX_DATA_FUNCS) *func_pointers;
272 if (!get_func_pointers(&func_pointers, ex_data_class)) {
273 /* TODO(davidben): This leaks memory on malloc error. */
274 return;
275 }
276
277 size_t i;
278 for (i = 0; i < sk_CRYPTO_EX_DATA_FUNCS_num(func_pointers); i++) {
279 CRYPTO_EX_DATA_FUNCS *func_pointer =
280 sk_CRYPTO_EX_DATA_FUNCS_value(func_pointers, i);
281 if (func_pointer->free_func) {
282 void *ptr = CRYPTO_get_ex_data(ad, i + ex_data_class->num_reserved);
283 func_pointer->free_func(obj, ptr, ad, i + ex_data_class->num_reserved,
284 func_pointer->argl, func_pointer->argp);
285 }
286 }
287
288 sk_CRYPTO_EX_DATA_FUNCS_free(func_pointers);
289
290 sk_void_free(ad->sk);
291 ad->sk = NULL;
292 }
293
CRYPTO_cleanup_all_ex_data(void)294 void CRYPTO_cleanup_all_ex_data(void) {}
295