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] =
104 #if CRYPTO_NUM_LOCKS != 29
105 # error "Inconsistency between crypto.h and cryptlib.c"
109 /* This is for applications to allocate new type names in the non-dynamic
110 array of lock names. These are numbered with positive numbers. */
111 static STACK *app_locks=NULL;
113 /* For applications that want a more dynamic way of handling threads, the
114 following stack is used. These are externally numbered with negative
116 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
119 static void (MS_FAR *locking_callback)(int mode,int type,
120 const char *file,int line)=NULL;
121 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
122 int type,const char *file,int line)=NULL;
123 static unsigned long (MS_FAR *id_callback)(void)=NULL;
124 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
125 (const char *file,int line)=NULL;
126 static void (MS_FAR *dynlock_lock_callback)(int mode,
127 struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
128 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
129 const char *file,int line)=NULL;
131 int CRYPTO_get_new_lockid(char *name)
136 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
137 /* A hack to make Visual C++ 5.0 work correctly when linking as
138 * a DLL using /MT. Without this, the application cannot use
139 * and floating point printf's.
140 * It also seems to be needed for Visual C 1.5 (win16) */
141 SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
144 if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
146 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
149 if ((str=BUF_strdup(name)) == NULL)
151 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
154 i=sk_push(app_locks,str);
158 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
162 int CRYPTO_num_locks(void)
164 return CRYPTO_NUM_LOCKS;
167 int CRYPTO_get_new_dynlockid(void)
170 CRYPTO_dynlock *pointer = NULL;
172 if (dynlock_create_callback == NULL)
174 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
177 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
178 if ((dyn_locks == NULL)
179 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
181 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
182 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
185 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
187 pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
190 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
193 pointer->references = 1;
194 pointer->data = dynlock_create_callback(__FILE__,__LINE__);
195 if (pointer->data == NULL)
197 OPENSSL_free(pointer);
198 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
202 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
203 /* First, try to find an existing empty slot */
204 i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
205 /* If there was none, push, thereby creating a new one */
207 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
208 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
212 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
213 OPENSSL_free(pointer);
216 i += 1; /* to avoid 0 */
220 void CRYPTO_destroy_dynlockid(int i)
222 CRYPTO_dynlock *pointer = NULL;
225 if (dynlock_destroy_callback == NULL)
228 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
230 if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
232 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
235 --pointer->references;
237 if (pointer->references < 0)
239 fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
244 if (--(pointer->references) <= 0)
246 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
251 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
255 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
256 OPENSSL_free(pointer);
260 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
262 CRYPTO_dynlock *pointer = NULL;
266 CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
268 if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
269 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
271 pointer->references++;
273 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
276 return pointer->data;
280 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
281 (const char *file,int line)
283 return(dynlock_create_callback);
286 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
287 struct CRYPTO_dynlock_value *l, const char *file,int line)
289 return(dynlock_lock_callback);
292 void (*CRYPTO_get_dynlock_destroy_callback(void))
293 (struct CRYPTO_dynlock_value *l, const char *file,int line)
295 return(dynlock_destroy_callback);
298 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
299 (const char *file, int line))
301 dynlock_create_callback=func;
304 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
305 struct CRYPTO_dynlock_value *l, const char *file, int line))
307 dynlock_lock_callback=func;
310 void CRYPTO_set_dynlock_destroy_callback(void (*func)
311 (struct CRYPTO_dynlock_value *l, const char *file, int line))
313 dynlock_destroy_callback=func;
317 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
320 return(locking_callback);
323 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
324 const char *file,int line)
326 return(add_lock_callback);
329 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
330 const char *file,int line))
332 locking_callback=func;
335 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
336 const char *file,int line))
338 add_lock_callback=func;
341 unsigned long (*CRYPTO_get_id_callback(void))(void)
346 void CRYPTO_set_id_callback(unsigned long (*func)(void))
351 unsigned long CRYPTO_thread_id(void)
355 if (id_callback == NULL)
357 #ifdef OPENSSL_SYS_WIN16
358 ret=(unsigned long)GetCurrentTask();
359 #elif defined(OPENSSL_SYS_WIN32)
360 ret=(unsigned long)GetCurrentThreadId();
361 #elif defined(GETPID_IS_MEANINGLESS)
364 ret=(unsigned long)getpid();
372 void CRYPTO_lock(int mode, int type, const char *file, int line)
376 char *rw_text,*operation_text;
378 if (mode & CRYPTO_LOCK)
379 operation_text="lock ";
380 else if (mode & CRYPTO_UNLOCK)
381 operation_text="unlock";
383 operation_text="ERROR ";
385 if (mode & CRYPTO_READ)
387 else if (mode & CRYPTO_WRITE)
392 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
393 CRYPTO_thread_id(), rw_text, operation_text,
394 CRYPTO_get_lock_name(type), file, line);
400 struct CRYPTO_dynlock_value *pointer
401 = CRYPTO_get_dynlock_value(i);
405 dynlock_lock_callback(mode, pointer, file, line);
408 CRYPTO_destroy_dynlockid(i);
411 if (locking_callback != NULL)
412 locking_callback(mode,type,file,line);
415 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
420 if (add_lock_callback != NULL)
423 int before= *pointer;
426 ret=add_lock_callback(pointer,amount,type,file,line);
428 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
431 CRYPTO_get_lock_name(type),
438 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
440 ret= *pointer+amount;
442 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
445 CRYPTO_get_lock_name(type),
449 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
454 const char *CRYPTO_get_lock_name(int type)
458 else if (type < CRYPTO_NUM_LOCKS)
459 return(lock_names[type]);
460 else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
463 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
467 #ifdef OPENSSL_SYS_WIN32
469 /* All we really need to do is remove the 'error' state when a thread
472 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
477 case DLL_PROCESS_ATTACH:
479 case DLL_THREAD_ATTACH:
481 case DLL_THREAD_DETACH:
484 case DLL_PROCESS_DETACH: