1 /* crypto/cryptlib.c */
2 /* ====================================================================
3 * Copyright (c) 1998-2006 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 "internal/cryptlib.h"
118 #include <openssl/safestack.h>
120 #if defined(OPENSSL_SYS_WIN32)
121 static double OpenSSL_MSVC5_hack = 0.0; /* and for VC1.5 */
124 /* real #defines in crypto.h, keep these upto date */
125 static const char *const lock_names[CRYPTO_NUM_LOCKS] = {
167 #if CRYPTO_NUM_LOCKS != 41
168 # error "Inconsistency between crypto.h and cryptlib.c"
173 * This is for applications to allocate new type names in the non-dynamic
174 * array of lock names. These are numbered with positive numbers.
176 static STACK_OF(OPENSSL_STRING) *app_locks = NULL;
179 * For applications that want a more dynamic way of handling threads, the
180 * following stack is used. These are externally numbered with negative
183 static STACK_OF(CRYPTO_dynlock) *dyn_locks = NULL;
185 static void (*locking_callback) (int mode, int type,
186 const char *file, int line) = 0;
187 static int (*add_lock_callback) (int *pointer, int amount,
188 int type, const char *file, int line) = 0;
189 static struct CRYPTO_dynlock_value *(*dynlock_create_callback)
190 (const char *file, int line) = 0;
191 static void (*dynlock_lock_callback) (int mode,
192 struct CRYPTO_dynlock_value *l,
193 const char *file, int line) = 0;
194 static void (*dynlock_destroy_callback) (struct CRYPTO_dynlock_value *l,
195 const char *file, int line) = 0;
197 int CRYPTO_get_new_lockid(char *name)
202 #if defined(OPENSSL_SYS_WIN32)
204 * A hack to make Visual C++ 5.0 work correctly when linking as a DLL
205 * using /MT. Without this, the application cannot use any floating point
206 * printf's. It also seems to be needed for Visual C 1.5 (win16)
208 OpenSSL_MSVC5_hack = (double)name[0] * (double)name[1];
211 if ((app_locks == NULL)
212 && ((app_locks = sk_OPENSSL_STRING_new_null()) == NULL)) {
213 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID, ERR_R_MALLOC_FAILURE);
216 if ((str = OPENSSL_strdup(name)) == NULL) {
217 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID, ERR_R_MALLOC_FAILURE);
220 i = sk_OPENSSL_STRING_push(app_locks, str);
224 i += CRYPTO_NUM_LOCKS; /* gap of one :-) */
228 int CRYPTO_num_locks(void)
230 return CRYPTO_NUM_LOCKS;
233 int CRYPTO_get_new_dynlockid(void)
236 CRYPTO_dynlock *pointer = NULL;
238 if (dynlock_create_callback == NULL) {
239 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,
240 CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
243 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
244 if ((dyn_locks == NULL)
245 && ((dyn_locks = sk_CRYPTO_dynlock_new_null()) == NULL)) {
246 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
247 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
250 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
252 pointer = OPENSSL_malloc(sizeof(*pointer));
253 if (pointer == NULL) {
254 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
257 pointer->references = 1;
258 pointer->data = dynlock_create_callback(__FILE__, __LINE__);
259 if (pointer->data == NULL) {
260 OPENSSL_free(pointer);
261 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID, ERR_R_MALLOC_FAILURE);
265 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
266 /* First, try to find an existing empty slot */
267 i = sk_CRYPTO_dynlock_find(dyn_locks, NULL);
268 /* If there was none, push, thereby creating a new one */
271 * Since sk_push() returns the number of items on the stack, not the
272 * location of the pushed item, we need to transform the returned
273 * number into a position, by decreasing it.
275 i = sk_CRYPTO_dynlock_push(dyn_locks, pointer) - 1;
278 * If we found a place with a NULL pointer, put our pointer in it.
280 (void)sk_CRYPTO_dynlock_set(dyn_locks, i, pointer);
281 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
284 dynlock_destroy_callback(pointer->data, __FILE__, __LINE__);
285 OPENSSL_free(pointer);
287 i += 1; /* to avoid 0 */
291 void CRYPTO_destroy_dynlockid(int i)
293 CRYPTO_dynlock *pointer = NULL;
296 if (dynlock_destroy_callback == NULL)
299 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
301 if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks)) {
302 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
305 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
306 if (pointer != NULL) {
307 --pointer->references;
309 if (pointer->references < 0) {
310 OPENSSL_showfatal("CRYPTO_destroy_dynlockid, bad reference count\n");
314 if (pointer->references <= 0) {
315 (void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
319 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
322 dynlock_destroy_callback(pointer->data, __FILE__, __LINE__);
323 OPENSSL_free(pointer);
327 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
329 CRYPTO_dynlock *pointer = NULL;
333 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
335 if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
336 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
338 pointer->references++;
340 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
343 return pointer->data;
347 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
348 (const char *file, int line) {
349 return (dynlock_create_callback);
352 void (*CRYPTO_get_dynlock_lock_callback(void)) (int mode,
353 struct CRYPTO_dynlock_value
354 *l, const char *file,
356 return (dynlock_lock_callback);
359 void (*CRYPTO_get_dynlock_destroy_callback(void))
360 (struct CRYPTO_dynlock_value *l, const char *file, int line) {
361 return (dynlock_destroy_callback);
364 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
365 (const char *file, int line))
367 dynlock_create_callback = func;
370 void CRYPTO_set_dynlock_lock_callback(void (*func) (int mode,
372 CRYPTO_dynlock_value *l,
377 FIPS_set_locking_callbacks(CRYPTO_lock, CRYPTO_add_lock);
379 dynlock_lock_callback = func;
382 void CRYPTO_set_dynlock_destroy_callback(void (*func)
383 (struct CRYPTO_dynlock_value *l,
384 const char *file, int line))
386 dynlock_destroy_callback = func;
389 void (*CRYPTO_get_locking_callback(void)) (int mode, int type,
390 const char *file, int line) {
391 return (locking_callback);
394 int (*CRYPTO_get_add_lock_callback(void)) (int *num, int mount, int type,
395 const char *file, int line) {
396 return (add_lock_callback);
399 void CRYPTO_set_locking_callback(void (*func) (int mode, int type,
400 const char *file, int line))
403 FIPS_set_locking_callbacks(CRYPTO_lock, CRYPTO_add_lock);
405 locking_callback = func;
408 void CRYPTO_set_add_lock_callback(int (*func) (int *num, int mount, int type,
409 const char *file, int line))
411 add_lock_callback = func;
414 void CRYPTO_lock(int mode, int type, const char *file, int line)
419 char *rw_text, *operation_text;
421 if (mode & CRYPTO_LOCK)
422 operation_text = "lock ";
423 else if (mode & CRYPTO_UNLOCK)
424 operation_text = "unlock";
426 operation_text = "ERROR ";
428 if (mode & CRYPTO_READ)
430 else if (mode & CRYPTO_WRITE)
435 CRYPTO_THREADID_current(&id);
436 fprintf(stderr, "lock:%08lx:(%s)%s %-18s %s:%d\n",
437 CRYPTO_THREADID_hash(&id), rw_text, operation_text,
438 CRYPTO_get_lock_name(type), file, line);
442 if (dynlock_lock_callback != NULL) {
443 struct CRYPTO_dynlock_value *pointer
444 = CRYPTO_get_dynlock_value(type);
446 OPENSSL_assert(pointer != NULL);
448 dynlock_lock_callback(mode, pointer, file, line);
450 CRYPTO_destroy_dynlockid(type);
452 } else if (locking_callback != NULL)
453 locking_callback(mode, type, file, line);
456 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
461 if (add_lock_callback != NULL) {
463 int before = *pointer;
466 ret = add_lock_callback(pointer, amount, type, file, line);
470 CRYPTO_THREADID_current(&id);
471 fprintf(stderr, "ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
472 CRYPTO_THREADID_hash(&id), before, amount, ret,
473 CRYPTO_get_lock_name(type), file, line);
477 CRYPTO_lock(CRYPTO_LOCK | CRYPTO_WRITE, type, file, line);
479 ret = *pointer + amount;
483 CRYPTO_THREADID_current(&id);
484 fprintf(stderr, "ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
485 CRYPTO_THREADID_hash(&id),
486 *pointer, amount, ret,
487 CRYPTO_get_lock_name(type), file, line);
491 CRYPTO_lock(CRYPTO_UNLOCK | CRYPTO_WRITE, type, file, line);
496 const char *CRYPTO_get_lock_name(int type)
500 else if (type < CRYPTO_NUM_LOCKS)
501 return (lock_names[type]);
502 else if (type - CRYPTO_NUM_LOCKS > sk_OPENSSL_STRING_num(app_locks))
505 return (sk_OPENSSL_STRING_value(app_locks, type - CRYPTO_NUM_LOCKS));