1 /* crypto/cryptlib.c */
2 /* ====================================================================
3 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
55 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
56 * All rights reserved.
58 * This package is an SSL implementation written
59 * by Eric Young (eay@cryptsoft.com).
60 * The implementation was written so as to conform with Netscapes SSL.
62 * This library is free for commercial and non-commercial use as long as
63 * the following conditions are aheared to. The following conditions
64 * apply to all code found in this distribution, be it the RC4, RSA,
65 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
66 * included with this distribution is covered by the same copyright terms
67 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
69 * Copyright remains Eric Young's, and as such any Copyright notices in
70 * the code are not to be removed.
71 * If this package is used in a product, Eric Young should be given attribution
72 * as the author of the parts of the library used.
73 * This can be in the form of a textual message at program startup or
74 * in documentation (online or textual) provided with the package.
76 * Redistribution and use in source and binary forms, with or without
77 * modification, are permitted provided that the following conditions
79 * 1. Redistributions of source code must retain the copyright
80 * notice, this list of conditions and the following disclaimer.
81 * 2. Redistributions in binary form must reproduce the above copyright
82 * notice, this list of conditions and the following disclaimer in the
83 * documentation and/or other materials provided with the distribution.
84 * 3. All advertising materials mentioning features or use of this software
85 * must display the following acknowledgement:
86 * "This product includes cryptographic software written by
87 * Eric Young (eay@cryptsoft.com)"
88 * The word 'cryptographic' can be left out if the rouines from the library
89 * being used are not cryptographic related :-).
90 * 4. If you include any Windows specific code (or a derivative thereof) from
91 * the apps directory (application code) you must include an acknowledgement:
92 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
94 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
95 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
97 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
98 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
99 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
100 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
101 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
102 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
103 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
106 * The licence and distribution terms for any publically available version or
107 * derivative of this code cannot be changed. i.e. this code cannot simply be
108 * copied and put under another distribution licence
109 * [including the GNU Public Licence.]
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECDH support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
117 #include "cryptlib.h"
118 #include <openssl/safestack.h>
120 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
121 static double SSLeay_MSVC5_hack = 0.0; /* and for VC1.5 */
124 DECLARE_STACK_OF(CRYPTO_dynlock)
125 IMPLEMENT_STACK_OF(CRYPTO_dynlock)
127 /* real #defines in crypto.h, keep these upto date */
128 static const char *const lock_names[CRYPTO_NUM_LOCKS] = {
169 # if CRYPTO_NUM_LOCKS != 39
170 # error "Inconsistency between crypto.h and cryptlib.c"
175 # if CRYPTO_NUM_LOCKS != 41
176 # error "Inconsistency between crypto.h and cryptlib.c"
182 * This is for applications to allocate new type names in the non-dynamic
183 * array of lock names. These are numbered with positive numbers.
185 static STACK *app_locks = NULL;
188 * For applications that want a more dynamic way of handling threads, the
189 * following stack is used. These are externally numbered with negative
192 static STACK_OF(CRYPTO_dynlock) *dyn_locks = NULL;
194 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
195 (const char *file, int line) = NULL;
196 static void (MS_FAR *dynlock_lock_callback) (int mode,
197 struct CRYPTO_dynlock_value *l,
198 const char *file, int line) =
200 static void (MS_FAR *dynlock_destroy_callback) (struct CRYPTO_dynlock_value
201 *l, const char *file,
204 int CRYPTO_get_new_lockid(char *name)
209 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
211 * A hack to make Visual C++ 5.0 work correctly when linking as a DLL
212 * using /MT. Without this, the application cannot use and floating point
213 * printf's. It also seems to be needed for Visual C 1.5 (win16)
215 SSLeay_MSVC5_hack = (double)name[0] * (double)name[1];
218 if ((app_locks == NULL) && ((app_locks = sk_new_null()) == NULL)) {
219 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID, ERR_R_MALLOC_FAILURE);
222 if ((str = BUF_strdup(name)) == NULL) {
223 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID, ERR_R_MALLOC_FAILURE);
226 i = sk_push(app_locks, str);
230 i += CRYPTO_NUM_LOCKS; /* gap of one :-) */
234 int CRYPTO_get_new_dynlockid(void)
237 CRYPTO_dynlock *pointer = NULL;
239 if (dynlock_create_callback == NULL) {
240 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,
241 CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
244 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
245 if ((dyn_locks == NULL)
246 && ((dyn_locks = sk_CRYPTO_dynlock_new_null()) == NULL)) {
247 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
248 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
251 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
253 pointer = (CRYPTO_dynlock *) OPENSSL_malloc(sizeof(CRYPTO_dynlock));
254 if (pointer == NULL) {
255 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
258 pointer->references = 1;
259 pointer->data = dynlock_create_callback(__FILE__, __LINE__);
260 if (pointer->data == NULL) {
261 OPENSSL_free(pointer);
262 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
266 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
267 /* First, try to find an existing empty slot */
268 i = sk_CRYPTO_dynlock_find(dyn_locks, NULL);
269 /* If there was none, push, thereby creating a new one */
272 * Since sk_push() returns the number of items on the stack, not the
273 * location of the pushed item, we need to transform the returned
274 * number into a position, by decreasing it.
276 i = sk_CRYPTO_dynlock_push(dyn_locks, pointer) - 1;
279 * If we found a place with a NULL pointer, put our pointer in it.
281 (void)sk_CRYPTO_dynlock_set(dyn_locks, i, pointer);
282 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
285 dynlock_destroy_callback(pointer->data, __FILE__, __LINE__);
286 OPENSSL_free(pointer);
288 i += 1; /* to avoid 0 */
292 void CRYPTO_destroy_dynlockid(int i)
294 CRYPTO_dynlock *pointer = NULL;
297 if (dynlock_destroy_callback == NULL)
300 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
302 if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks)) {
303 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
306 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
307 if (pointer != NULL) {
308 --pointer->references;
310 if (pointer->references < 0) {
312 "CRYPTO_destroy_dynlockid, bad reference count\n");
316 if (pointer->references <= 0) {
317 (void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
321 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
324 dynlock_destroy_callback(pointer->data, __FILE__, __LINE__);
325 OPENSSL_free(pointer);
329 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
331 CRYPTO_dynlock *pointer = NULL;
335 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
337 if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
338 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
340 pointer->references++;
342 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
345 return pointer->data;
349 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
350 (const char *file, int line) {
351 return (dynlock_create_callback);
354 void (*CRYPTO_get_dynlock_lock_callback(void)) (int mode,
355 struct CRYPTO_dynlock_value
356 *l, const char *file,
358 return (dynlock_lock_callback);
361 void (*CRYPTO_get_dynlock_destroy_callback(void))
362 (struct CRYPTO_dynlock_value *l, const char *file, int line) {
363 return (dynlock_destroy_callback);
366 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
367 (const char *file, int line))
369 dynlock_create_callback = func;
372 static void do_dynlock(int mode, int type, const char *file, int line)
374 if (dynlock_lock_callback != NULL) {
375 struct CRYPTO_dynlock_value *pointer = CRYPTO_get_dynlock_value(type);
377 OPENSSL_assert(pointer != NULL);
379 dynlock_lock_callback(mode, pointer, file, line);
381 CRYPTO_destroy_dynlockid(type);
385 void CRYPTO_set_dynlock_lock_callback(void (*func) (int mode,
387 CRYPTO_dynlock_value *l,
392 * Set callback so CRYPTO_lock() can now handle dynamic locks. This is OK
393 * because at this point and application shouldn't be using OpenSSL from
394 * multiple threads because it is setting up the locking callbacks.
398 int_CRYPTO_set_do_dynlock_callback(do_dynlock);
402 dynlock_lock_callback = func;
405 void CRYPTO_set_dynlock_destroy_callback(void (*func)
406 (struct CRYPTO_dynlock_value *l,
407 const char *file, int line))
409 dynlock_destroy_callback = func;
412 const char *CRYPTO_get_lock_name(int type)
416 else if (type < CRYPTO_NUM_LOCKS)
417 return (lock_names[type]);
418 else if (type - CRYPTO_NUM_LOCKS > sk_num(app_locks))
421 return (sk_value(app_locks, type - CRYPTO_NUM_LOCKS));