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[openssl.git] / crypto / cryptlib.c
1 /* crypto/cryptlib.c */
2 /* ====================================================================
3  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer. 
11  *
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
15  *    distribution.
16  *
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/)"
21  *
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.
26  *
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.
30  *
31  * 6. Redistributions of any form whatsoever must retain the following
32  *    acknowledgment:
33  *    "This product includes software developed by the OpenSSL Project
34  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35  *
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  * ====================================================================
49  *
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).
53  *
54  */
55 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
56  * All rights reserved.
57  *
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.
61  * 
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).
68  * 
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.
75  * 
76  * Redistribution and use in source and binary forms, with or without
77  * modification, are permitted provided that the following conditions
78  * are met:
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)"
93  * 
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
104  * SUCH DAMAGE.
105  * 
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.]
110  */
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.
115  */
116
117 #include "cryptlib.h"
118 #include <openssl/safestack.h>
119
120 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
121 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
122 #endif
123
124 DECLARE_STACK_OF(CRYPTO_dynlock)
125 IMPLEMENT_STACK_OF(CRYPTO_dynlock)
126
127 /* real #defines in crypto.h, keep these upto date */
128 static const char* const lock_names[CRYPTO_NUM_LOCKS] =
129         {
130         "<<ERROR>>",
131         "err",
132         "ex_data",
133         "x509",
134         "x509_info",
135         "x509_pkey",
136         "x509_crl",
137         "x509_req",
138         "dsa",
139         "rsa",
140         "evp_pkey",
141         "x509_store",
142         "ssl_ctx",
143         "ssl_cert",
144         "ssl_session",
145         "ssl_sess_cert",
146         "ssl",
147         "ssl_method",
148         "rand",
149         "rand2",
150         "debug_malloc",
151         "BIO",
152         "gethostbyname",
153         "getservbyname",
154         "readdir",
155         "RSA_blinding",
156         "dh",
157         "debug_malloc2",
158         "dso",
159         "dynlock",
160         "engine",
161         "ui",
162         "ecdsa",
163         "ec",
164         "ecdh",
165         "bn",
166         "ec_pre_comp",
167         "store",
168         "comp",
169 #if CRYPTO_NUM_LOCKS != 39
170 # error "Inconsistency between crypto.h and cryptlib.c"
171 #endif
172         };
173
174 /* This is for applications to allocate new type names in the non-dynamic
175    array of lock names.  These are numbered with positive numbers.  */
176 static STACK *app_locks=NULL;
177
178 /* For applications that want a more dynamic way of handling threads, the
179    following stack is used.  These are externally numbered with negative
180    numbers.  */
181 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
182
183
184 static void (MS_FAR *locking_callback)(int mode,int type,
185         const char *file,int line)=0;
186 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
187         int type,const char *file,int line)=0;
188 static unsigned long (MS_FAR *id_callback)(void)=0;
189 static void *(MS_FAR *idptr_callback)(void)=0;
190 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
191         (const char *file,int line)=0;
192 static void (MS_FAR *dynlock_lock_callback)(int mode,
193         struct CRYPTO_dynlock_value *l, const char *file,int line)=0;
194 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
195         const char *file,int line)=0;
196
197 int CRYPTO_get_new_lockid(char *name)
198         {
199         char *str;
200         int i;
201
202 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
203         /* A hack to make Visual C++ 5.0 work correctly when linking as
204          * a DLL using /MT. Without this, the application cannot use
205          * and floating point printf's.
206          * It also seems to be needed for Visual C 1.5 (win16) */
207         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
208 #endif
209
210         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
211                 {
212                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
213                 return(0);
214                 }
215         if ((str=BUF_strdup(name)) == NULL)
216                 {
217                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
218                 return(0);
219                 }
220         i=sk_push(app_locks,str);
221         if (!i)
222                 OPENSSL_free(str);
223         else
224                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
225         return(i);
226         }
227
228 int CRYPTO_num_locks(void)
229         {
230         return CRYPTO_NUM_LOCKS;
231         }
232
233 int CRYPTO_get_new_dynlockid(void)
234         {
235         int i = 0;
236         CRYPTO_dynlock *pointer = NULL;
237
238         if (dynlock_create_callback == NULL)
239                 {
240                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
241                 return(0);
242                 }
243         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
244         if ((dyn_locks == NULL)
245                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
246                 {
247                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
248                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
249                 return(0);
250                 }
251         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
252
253         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
254         if (pointer == NULL)
255                 {
256                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
257                 return(0);
258                 }
259         pointer->references = 1;
260         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
261         if (pointer->data == NULL)
262                 {
263                 OPENSSL_free(pointer);
264                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
265                 return(0);
266                 }
267
268         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
269         /* First, try to find an existing empty slot */
270         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
271         /* If there was none, push, thereby creating a new one */
272         if (i == -1)
273                 /* Since sk_push() returns the number of items on the
274                    stack, not the location of the pushed item, we need
275                    to transform the returned number into a position,
276                    by decreasing it.  */
277                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
278         else
279                 /* If we found a place with a NULL pointer, put our pointer
280                    in it.  */
281                 sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
282         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
283
284         if (i == -1)
285                 {
286                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
287                 OPENSSL_free(pointer);
288                 }
289         else
290                 i += 1; /* to avoid 0 */
291         return -i;
292         }
293
294 void CRYPTO_destroy_dynlockid(int i)
295         {
296         CRYPTO_dynlock *pointer = NULL;
297         if (i)
298                 i = -i-1;
299         if (dynlock_destroy_callback == NULL)
300                 return;
301
302         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
303
304         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
305                 {
306                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
307                 return;
308                 }
309         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
310         if (pointer != NULL)
311                 {
312                 --pointer->references;
313 #ifdef REF_CHECK
314                 if (pointer->references < 0)
315                         {
316                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
317                         abort();
318                         }
319                 else
320 #endif
321                         if (pointer->references <= 0)
322                                 {
323                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
324                                 }
325                         else
326                                 pointer = NULL;
327                 }
328         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
329
330         if (pointer)
331                 {
332                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
333                 OPENSSL_free(pointer);
334                 }
335         }
336
337 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
338         {
339         CRYPTO_dynlock *pointer = NULL;
340         if (i)
341                 i = -i-1;
342
343         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
344
345         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
346                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
347         if (pointer)
348                 pointer->references++;
349
350         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
351
352         if (pointer)
353                 return pointer->data;
354         return NULL;
355         }
356
357 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
358         (const char *file,int line)
359         {
360         return(dynlock_create_callback);
361         }
362
363 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
364         struct CRYPTO_dynlock_value *l, const char *file,int line)
365         {
366         return(dynlock_lock_callback);
367         }
368
369 void (*CRYPTO_get_dynlock_destroy_callback(void))
370         (struct CRYPTO_dynlock_value *l, const char *file,int line)
371         {
372         return(dynlock_destroy_callback);
373         }
374
375 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
376         (const char *file, int line))
377         {
378         dynlock_create_callback=func;
379         }
380
381 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
382         struct CRYPTO_dynlock_value *l, const char *file, int line))
383         {
384         dynlock_lock_callback=func;
385         }
386
387 void CRYPTO_set_dynlock_destroy_callback(void (*func)
388         (struct CRYPTO_dynlock_value *l, const char *file, int line))
389         {
390         dynlock_destroy_callback=func;
391         }
392
393
394 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
395                 int line)
396         {
397         return(locking_callback);
398         }
399
400 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
401                                           const char *file,int line)
402         {
403         return(add_lock_callback);
404         }
405
406 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
407                                               const char *file,int line))
408         {
409         locking_callback=func;
410         }
411
412 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
413                                               const char *file,int line))
414         {
415         add_lock_callback=func;
416         }
417
418 unsigned long (*CRYPTO_get_id_callback(void))(void)
419         {
420         return(id_callback);
421         }
422
423 void CRYPTO_set_id_callback(unsigned long (*func)(void))
424         {
425         id_callback=func;
426         }
427
428 unsigned long CRYPTO_thread_id(void)
429         {
430         unsigned long ret=0;
431
432         if (id_callback == NULL)
433                 {
434 #ifdef OPENSSL_SYS_WIN16
435                 ret=(unsigned long)GetCurrentTask();
436 #elif defined(OPENSSL_SYS_WIN32)
437                 ret=(unsigned long)GetCurrentThreadId();
438 #elif defined(GETPID_IS_MEANINGLESS)
439                 ret=1L;
440 #elif defined(OPENSSL_SYS_BEOS)
441                 ret=(unsigned long)find_thread(NULL);
442 #else
443                 ret=(unsigned long)getpid();
444 #endif
445                 }
446         else
447                 ret=id_callback();
448         return(ret);
449         }
450
451 void *(*CRYPTO_get_idptr_callback(void))(void)
452         {
453         return(idptr_callback);
454         }
455
456 void CRYPTO_set_idptr_callback(void *(*func)(void))
457         {
458         idptr_callback=func;
459         }
460
461 void *CRYPTO_thread_idptr(void)
462         {
463         void *ret=NULL;
464
465         if (idptr_callback == NULL)
466                 ret = &errno;
467         else
468                 ret = idptr_callback();
469
470         return ret;
471         }
472
473 void CRYPTO_lock(int mode, int type, const char *file, int line)
474         {
475 #ifdef LOCK_DEBUG
476                 {
477                 char *rw_text,*operation_text;
478
479                 if (mode & CRYPTO_LOCK)
480                         operation_text="lock  ";
481                 else if (mode & CRYPTO_UNLOCK)
482                         operation_text="unlock";
483                 else
484                         operation_text="ERROR ";
485
486                 if (mode & CRYPTO_READ)
487                         rw_text="r";
488                 else if (mode & CRYPTO_WRITE)
489                         rw_text="w";
490                 else
491                         rw_text="ERROR";
492
493                 fprintf(stderr,"lock:%08lx/%08p:(%s)%s %-18s %s:%d\n",
494                         CRYPTO_thread_id(), CRYPTO_thread_idptr(), rw_text, operation_text,
495                         CRYPTO_get_lock_name(type), file, line);
496                 }
497 #endif
498         if (type < 0)
499                 {
500                 if (dynlock_lock_callback != NULL)
501                         {
502                         struct CRYPTO_dynlock_value *pointer
503                                 = CRYPTO_get_dynlock_value(type);
504
505                         OPENSSL_assert(pointer != NULL);
506
507                         dynlock_lock_callback(mode, pointer, file, line);
508
509                         CRYPTO_destroy_dynlockid(type);
510                         }
511                 }
512         else
513                 if (locking_callback != NULL)
514                         locking_callback(mode,type,file,line);
515         }
516
517 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
518              int line)
519         {
520         int ret = 0;
521
522         if (add_lock_callback != NULL)
523                 {
524 #ifdef LOCK_DEBUG
525                 int before= *pointer;
526 #endif
527
528                 ret=add_lock_callback(pointer,amount,type,file,line);
529 #ifdef LOCK_DEBUG
530                 fprintf(stderr,"ladd:%08lx/%0xp:%2d+%2d->%2d %-18s %s:%d\n",
531                         CRYPTO_thread_id(), CRYPTO_thread_idptr(),
532                         before,amount,ret,
533                         CRYPTO_get_lock_name(type),
534                         file,line);
535 #endif
536                 }
537         else
538                 {
539                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
540
541                 ret= *pointer+amount;
542 #ifdef LOCK_DEBUG
543                 fprintf(stderr,"ladd:%08lx/%0xp:%2d+%2d->%2d %-18s %s:%d\n",
544                         CRYPTO_thread_id(), CRYPTO_thread_idptr(),
545                         *pointer,amount,ret,
546                         CRYPTO_get_lock_name(type),
547                         file,line);
548 #endif
549                 *pointer=ret;
550                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
551                 }
552         return(ret);
553         }
554
555 const char *CRYPTO_get_lock_name(int type)
556         {
557         if (type < 0)
558                 return("dynamic");
559         else if (type < CRYPTO_NUM_LOCKS)
560                 return(lock_names[type]);
561         else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
562                 return("ERROR");
563         else
564                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
565         }
566
567 #if     defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
568         defined(__INTEL__) || \
569         defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD64)
570
571 unsigned long  OPENSSL_ia32cap_P=0;
572 unsigned long *OPENSSL_ia32cap_loc(void) { return &OPENSSL_ia32cap_P; }
573
574 #if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
575 #define OPENSSL_CPUID_SETUP
576 void OPENSSL_cpuid_setup(void)
577 { static int trigger=0;
578   unsigned long OPENSSL_ia32_cpuid(void);
579   char *env;
580
581     if (trigger)        return;
582
583     trigger=1;
584     if ((env=getenv("OPENSSL_ia32cap")))
585         OPENSSL_ia32cap_P = strtoul(env,NULL,0)|(1<<10);
586     else
587         OPENSSL_ia32cap_P = OPENSSL_ia32_cpuid()|(1<<10);
588     /*
589      * |(1<<10) sets a reserved bit to signal that variable
590      * was initialized already... This is to avoid interference
591      * with cpuid snippets in ELF .init segment.
592      */
593 }
594 #endif
595
596 #else
597 unsigned long *OPENSSL_ia32cap_loc(void) { return NULL; }
598 #endif
599 int OPENSSL_NONPIC_relocated = 0;
600 #if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)
601 void OPENSSL_cpuid_setup(void) {}
602 #endif
603
604 #if (defined(_WIN32) || defined(__CYGWIN__)) && defined(_WINDLL)
605 #ifdef __CYGWIN__
606 /* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
607 #include <windows.h>
608 #endif
609
610 /* All we really need to do is remove the 'error' state when a thread
611  * detaches */
612
613 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
614              LPVOID lpvReserved)
615         {
616         switch(fdwReason)
617                 {
618         case DLL_PROCESS_ATTACH:
619                 OPENSSL_cpuid_setup();
620 #if defined(_WIN32_WINNT)
621                 {
622                 IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER *)hinstDLL;
623                 IMAGE_NT_HEADERS *nt_headers;
624
625                 if (dos_header->e_magic==IMAGE_DOS_SIGNATURE)
626                         {
627                         nt_headers = (IMAGE_NT_HEADERS *)((char *)dos_header
628                                                 + dos_header->e_lfanew);
629                         if (nt_headers->Signature==IMAGE_NT_SIGNATURE &&
630                             hinstDLL!=(HINSTANCE)(nt_headers->OptionalHeader.ImageBase))
631                                 OPENSSL_NONPIC_relocated=1;
632                         }
633                 }
634 #endif
635                 break;
636         case DLL_THREAD_ATTACH:
637                 break;
638         case DLL_THREAD_DETACH:
639                 ERR_remove_state(0);
640                 break;
641         case DLL_PROCESS_DETACH:
642                 break;
643                 }
644         return(TRUE);
645         }
646 #endif
647
648 #if defined(_WIN32) && !defined(__CYGWIN__)
649 #include <tchar.h>
650
651 #if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
652 int OPENSSL_isservice(void)
653 { HWINSTA h;
654   DWORD len;
655   WCHAR *name;
656
657     (void)GetDesktopWindow(); /* return value is ignored */
658
659     h = GetProcessWindowStation();
660     if (h==NULL) return -1;
661
662     if (GetUserObjectInformationW (h,UOI_NAME,NULL,0,&len) ||
663         GetLastError() != ERROR_INSUFFICIENT_BUFFER)
664         return -1;
665
666     if (len>512) return -1;             /* paranoia */
667     len++,len&=~1;                      /* paranoia */
668 #ifdef _MSC_VER
669     name=(WCHAR *)_alloca(len+sizeof(WCHAR));
670 #else
671     name=(WCHAR *)alloca(len+sizeof(WCHAR));
672 #endif
673     if (!GetUserObjectInformationW (h,UOI_NAME,name,len,&len))
674         return -1;
675
676     len++,len&=~1;                      /* paranoia */
677     name[len/sizeof(WCHAR)]=L'\0';      /* paranoia */
678 #if 1
679     /* This doesn't cover "interactive" services [working with real
680      * WinSta0's] nor programs started non-interactively by Task
681      * Scheduler [those are working with SAWinSta]. */
682     if (wcsstr(name,L"Service-0x"))     return 1;
683 #else
684     /* This covers all non-interactive programs such as services. */
685     if (!wcsstr(name,L"WinSta0"))       return 1;
686 #endif
687     else                                return 0;
688 }
689 #else
690 int OPENSSL_isservice(void) { return 0; }
691 #endif
692
693 void OPENSSL_showfatal (const char *fmta,...)
694 { va_list ap;
695   TCHAR buf[256];
696   const TCHAR *fmt;
697 #ifdef STD_ERROR_HANDLE /* what a dirty trick! */
698   HANDLE h;
699
700     if ((h=GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
701         GetFileType(h)!=FILE_TYPE_UNKNOWN)
702     {   /* must be console application */
703         va_start (ap,fmta);
704         vfprintf (stderr,fmta,ap);
705         va_end (ap);
706         return;
707     }
708 #endif
709
710     if (sizeof(TCHAR)==sizeof(char))
711         fmt=(const TCHAR *)fmta;
712     else do
713     { int    keepgoing;
714       size_t len_0=strlen(fmta)+1,i;
715       WCHAR *fmtw;
716
717 #ifdef _MSC_VER
718         fmtw = (WCHAR *)_alloca (len_0*sizeof(WCHAR));
719 #else
720         fmtw = (WCHAR *)alloca (len_0*sizeof(WCHAR));
721 #endif
722         if (fmtw == NULL) { fmt=(const TCHAR *)L"no stack?"; break; }
723
724 #ifndef OPENSSL_NO_MULTIBYTE
725         if (!MultiByteToWideChar(CP_ACP,0,fmta,len_0,fmtw,len_0))
726 #endif
727             for (i=0;i<len_0;i++) fmtw[i]=(WCHAR)fmta[i];
728
729         for (i=0;i<len_0;i++)
730         {   if (fmtw[i]==L'%') do
731             {   keepgoing=0;
732                 switch (fmtw[i+1])
733                 {   case L'0': case L'1': case L'2': case L'3': case L'4':
734                     case L'5': case L'6': case L'7': case L'8': case L'9':
735                     case L'.': case L'*':
736                     case L'-':  i++; keepgoing=1; break;
737                     case L's':  fmtw[i+1]=L'S';   break;
738                     case L'S':  fmtw[i+1]=L's';   break;
739                     case L'c':  fmtw[i+1]=L'C';   break;
740                     case L'C':  fmtw[i+1]=L'c';   break;
741                 }
742             } while (keepgoing);
743         }
744         fmt = (const TCHAR *)fmtw;
745     } while (0);
746
747     va_start (ap,fmta);
748     _vsntprintf (buf,sizeof(buf)/sizeof(TCHAR)-1,fmt,ap);
749     buf [sizeof(buf)/sizeof(TCHAR)-1] = _T('\0');
750     va_end (ap);
751
752 #if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
753     /* this -------------v--- guards NT-specific calls */
754     if (GetVersion() < 0x80000000 && OPENSSL_isservice())
755     {   HANDLE h = RegisterEventSource(0,_T("OPENSSL"));
756         const TCHAR *pmsg=buf;
757         ReportEvent(h,EVENTLOG_ERROR_TYPE,0,0,0,1,0,&pmsg,0);
758         DeregisterEventSource(h);
759     }
760     else
761 #endif
762         MessageBox (NULL,buf,_T("OpenSSL: FATAL"),MB_OK|MB_ICONSTOP);
763 }
764 #else
765 void OPENSSL_showfatal (const char *fmta,...)
766 { va_list ap;
767
768     va_start (ap,fmta);
769     vfprintf (stderr,fmta,ap);
770     va_end (ap);
771 }
772 int OPENSSL_isservice (void) { return 0; }
773 #endif
774
775 void OpenSSLDie(const char *file,int line,const char *assertion)
776         {
777         OPENSSL_showfatal(
778                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
779                 file,line,assertion);
780         abort();
781         }
782
783 void *OPENSSL_stderr(void)      { return stderr; }