1 /* crypto/cryptlib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
62 #include <openssl/crypto.h>
63 #include <openssl/safestack.h>
65 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
66 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
69 DECLARE_STACK_OF(CRYPTO_dynlock)
70 IMPLEMENT_STACK_OF(CRYPTO_dynlock)
72 /* real #defines in crypto.h, keep these upto date */
73 static const char* lock_names[CRYPTO_NUM_LOCKS] =
107 #if CRYPTO_NUM_LOCKS != 32
108 # error "Inconsistency between crypto.h and cryptlib.c"
112 /* This is for applications to allocate new type names in the non-dynamic
113 array of lock names. These are numbered with positive numbers. */
114 static STACK *app_locks=NULL;
116 /* For applications that want a more dynamic way of handling threads, the
117 following stack is used. These are externally numbered with negative
119 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
122 static void (MS_FAR *locking_callback)(int mode,int type,
123 const char *file,int line)=NULL;
124 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
125 int type,const char *file,int line)=NULL;
126 static unsigned long (MS_FAR *id_callback)(void)=NULL;
127 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
128 (const char *file,int line)=NULL;
129 static void (MS_FAR *dynlock_lock_callback)(int mode,
130 struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
131 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
132 const char *file,int line)=NULL;
134 int CRYPTO_get_new_lockid(char *name)
139 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
140 /* A hack to make Visual C++ 5.0 work correctly when linking as
141 * a DLL using /MT. Without this, the application cannot use
142 * and floating point printf's.
143 * It also seems to be needed for Visual C 1.5 (win16) */
144 SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
147 if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
149 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
152 if ((str=BUF_strdup(name)) == NULL)
154 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
157 i=sk_push(app_locks,str);
161 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
165 int CRYPTO_num_locks(void)
167 return CRYPTO_NUM_LOCKS;
170 int CRYPTO_get_new_dynlockid(void)
173 CRYPTO_dynlock *pointer = NULL;
175 if (dynlock_create_callback == NULL)
177 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
180 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
181 if ((dyn_locks == NULL)
182 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
184 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
185 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
188 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
190 pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
193 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
196 pointer->references = 1;
197 pointer->data = dynlock_create_callback(__FILE__,__LINE__);
198 if (pointer->data == NULL)
200 OPENSSL_free(pointer);
201 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
205 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
206 /* First, try to find an existing empty slot */
207 i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
208 /* If there was none, push, thereby creating a new one */
210 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
211 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
215 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
216 OPENSSL_free(pointer);
219 i += 1; /* to avoid 0 */
223 void CRYPTO_destroy_dynlockid(int i)
225 CRYPTO_dynlock *pointer = NULL;
228 if (dynlock_destroy_callback == NULL)
231 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
233 if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
235 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
238 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
241 --pointer->references;
243 if (pointer->references < 0)
245 fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
250 if (pointer->references <= 0)
252 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
257 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
261 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
262 OPENSSL_free(pointer);
266 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
268 CRYPTO_dynlock *pointer = NULL;
272 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
274 if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
275 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
277 pointer->references++;
279 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
282 return pointer->data;
286 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
287 (const char *file,int line)
289 return(dynlock_create_callback);
292 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
293 struct CRYPTO_dynlock_value *l, const char *file,int line)
295 return(dynlock_lock_callback);
298 void (*CRYPTO_get_dynlock_destroy_callback(void))
299 (struct CRYPTO_dynlock_value *l, const char *file,int line)
301 return(dynlock_destroy_callback);
304 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
305 (const char *file, int line))
307 dynlock_create_callback=func;
310 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
311 struct CRYPTO_dynlock_value *l, const char *file, int line))
313 dynlock_lock_callback=func;
316 void CRYPTO_set_dynlock_destroy_callback(void (*func)
317 (struct CRYPTO_dynlock_value *l, const char *file, int line))
319 dynlock_destroy_callback=func;
323 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
326 return(locking_callback);
329 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
330 const char *file,int line)
332 return(add_lock_callback);
335 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
336 const char *file,int line))
338 locking_callback=func;
341 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
342 const char *file,int line))
344 add_lock_callback=func;
347 unsigned long (*CRYPTO_get_id_callback(void))(void)
352 void CRYPTO_set_id_callback(unsigned long (*func)(void))
357 unsigned long CRYPTO_thread_id(void)
361 if (id_callback == NULL)
363 #ifdef OPENSSL_SYS_WIN16
364 ret=(unsigned long)GetCurrentTask();
365 #elif defined(OPENSSL_SYS_WIN32)
366 ret=(unsigned long)GetCurrentThreadId();
367 #elif defined(GETPID_IS_MEANINGLESS)
370 ret=(unsigned long)getpid();
378 void CRYPTO_lock(int mode, int type, const char *file, int line)
382 char *rw_text,*operation_text;
384 if (mode & CRYPTO_LOCK)
385 operation_text="lock ";
386 else if (mode & CRYPTO_UNLOCK)
387 operation_text="unlock";
389 operation_text="ERROR ";
391 if (mode & CRYPTO_READ)
393 else if (mode & CRYPTO_WRITE)
398 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
399 CRYPTO_thread_id(), rw_text, operation_text,
400 CRYPTO_get_lock_name(type), file, line);
405 struct CRYPTO_dynlock_value *pointer
406 = CRYPTO_get_dynlock_value(type);
408 if (pointer && dynlock_lock_callback)
410 dynlock_lock_callback(mode, pointer, file, line);
413 CRYPTO_destroy_dynlockid(type);
416 if (locking_callback != NULL)
417 locking_callback(mode,type,file,line);
420 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
425 if (add_lock_callback != NULL)
428 int before= *pointer;
431 ret=add_lock_callback(pointer,amount,type,file,line);
433 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
436 CRYPTO_get_lock_name(type),
442 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
444 ret= *pointer+amount;
446 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
449 CRYPTO_get_lock_name(type),
453 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
458 const char *CRYPTO_get_lock_name(int type)
462 else if (type < CRYPTO_NUM_LOCKS)
463 return(lock_names[type]);
464 else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
467 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
471 #ifdef OPENSSL_SYS_WIN32
473 /* All we really need to do is remove the 'error' state when a thread
476 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
481 case DLL_PROCESS_ATTACH:
483 case DLL_THREAD_ATTACH:
485 case DLL_THREAD_DETACH:
488 case DLL_PROCESS_DETACH: