ctr129.c: fix typo, simplify ctr128_inc and fix "n=0" bug [from HEAD].
[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
126 /* real #defines in crypto.h, keep these upto date */
127 static const char* const lock_names[CRYPTO_NUM_LOCKS] =
128         {
129         "<<ERROR>>",
130         "err",
131         "ex_data",
132         "x509",
133         "x509_info",
134         "x509_pkey",
135         "x509_crl",
136         "x509_req",
137         "dsa",
138         "rsa",
139         "evp_pkey",
140         "x509_store",
141         "ssl_ctx",
142         "ssl_cert",
143         "ssl_session",
144         "ssl_sess_cert",
145         "ssl",
146         "ssl_method",
147         "rand",
148         "rand2",
149         "debug_malloc",
150         "BIO",
151         "gethostbyname",
152         "getservbyname",
153         "readdir",
154         "RSA_blinding",
155         "dh",
156         "debug_malloc2",
157         "dso",
158         "dynlock",
159         "engine",
160         "ui",
161         "ecdsa",
162         "ec",
163         "ecdh",
164         "bn",
165         "ec_pre_comp",
166         "store",
167         "comp",
168         "fips",
169         "fips2",
170 #if CRYPTO_NUM_LOCKS != 41
171 # error "Inconsistency between crypto.h and cryptlib.c"
172 #endif
173         };
174
175 /* This is for applications to allocate new type names in the non-dynamic
176    array of lock names.  These are numbered with positive numbers.  */
177 static STACK_OF(OPENSSL_STRING) *app_locks=NULL;
178
179 /* For applications that want a more dynamic way of handling threads, the
180    following stack is used.  These are externally numbered with negative
181    numbers.  */
182 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
183
184
185 static void (MS_FAR *locking_callback)(int mode,int type,
186         const char *file,int line)=0;
187 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
188         int type,const char *file,int line)=0;
189 #ifndef OPENSSL_NO_DEPRECATED
190 static unsigned long (MS_FAR *id_callback)(void)=0;
191 #endif
192 static void (MS_FAR *threadid_callback)(CRYPTO_THREADID *)=0;
193 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
194         (const char *file,int line)=0;
195 static void (MS_FAR *dynlock_lock_callback)(int mode,
196         struct CRYPTO_dynlock_value *l, const char *file,int line)=0;
197 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
198         const char *file,int line)=0;
199
200 int CRYPTO_get_new_lockid(char *name)
201         {
202         char *str;
203         int i;
204
205 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
206         /* A hack to make Visual C++ 5.0 work correctly when linking as
207          * a DLL using /MT. Without this, the application cannot use
208          * any floating point printf's.
209          * It also seems to be needed for Visual C 1.5 (win16) */
210         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
211 #endif
212
213         if ((app_locks == NULL) && ((app_locks=sk_OPENSSL_STRING_new_null()) == NULL))
214                 {
215                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
216                 return(0);
217                 }
218         if ((str=BUF_strdup(name)) == NULL)
219                 {
220                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
221                 return(0);
222                 }
223         i=sk_OPENSSL_STRING_push(app_locks,str);
224         if (!i)
225                 OPENSSL_free(str);
226         else
227                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
228         return(i);
229         }
230
231 int CRYPTO_num_locks(void)
232         {
233         return CRYPTO_NUM_LOCKS;
234         }
235
236 int CRYPTO_get_new_dynlockid(void)
237         {
238         int i = 0;
239         CRYPTO_dynlock *pointer = NULL;
240
241         if (dynlock_create_callback == NULL)
242                 {
243                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
244                 return(0);
245                 }
246         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
247         if ((dyn_locks == NULL)
248                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
249                 {
250                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
251                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
252                 return(0);
253                 }
254         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
255
256         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
257         if (pointer == NULL)
258                 {
259                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
260                 return(0);
261                 }
262         pointer->references = 1;
263         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
264         if (pointer->data == NULL)
265                 {
266                 OPENSSL_free(pointer);
267                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
268                 return(0);
269                 }
270
271         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
272         /* First, try to find an existing empty slot */
273         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
274         /* If there was none, push, thereby creating a new one */
275         if (i == -1)
276                 /* Since sk_push() returns the number of items on the
277                    stack, not the location of the pushed item, we need
278                    to transform the returned number into a position,
279                    by decreasing it.  */
280                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
281         else
282                 /* If we found a place with a NULL pointer, put our pointer
283                    in it.  */
284                 (void)sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
285         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
286
287         if (i == -1)
288                 {
289                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
290                 OPENSSL_free(pointer);
291                 }
292         else
293                 i += 1; /* to avoid 0 */
294         return -i;
295         }
296
297 void CRYPTO_destroy_dynlockid(int i)
298         {
299         CRYPTO_dynlock *pointer = NULL;
300         if (i)
301                 i = -i-1;
302         if (dynlock_destroy_callback == NULL)
303                 return;
304
305         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
306
307         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
308                 {
309                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
310                 return;
311                 }
312         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
313         if (pointer != NULL)
314                 {
315                 --pointer->references;
316 #ifdef REF_CHECK
317                 if (pointer->references < 0)
318                         {
319                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
320                         abort();
321                         }
322                 else
323 #endif
324                         if (pointer->references <= 0)
325                                 {
326                                 (void)sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
327                                 }
328                         else
329                                 pointer = NULL;
330                 }
331         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
332
333         if (pointer)
334                 {
335                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
336                 OPENSSL_free(pointer);
337                 }
338         }
339
340 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
341         {
342         CRYPTO_dynlock *pointer = NULL;
343         if (i)
344                 i = -i-1;
345
346         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
347
348         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
349                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
350         if (pointer)
351                 pointer->references++;
352
353         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
354
355         if (pointer)
356                 return pointer->data;
357         return NULL;
358         }
359
360 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
361         (const char *file,int line)
362         {
363         return(dynlock_create_callback);
364         }
365
366 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
367         struct CRYPTO_dynlock_value *l, const char *file,int line)
368         {
369         return(dynlock_lock_callback);
370         }
371
372 void (*CRYPTO_get_dynlock_destroy_callback(void))
373         (struct CRYPTO_dynlock_value *l, const char *file,int line)
374         {
375         return(dynlock_destroy_callback);
376         }
377
378 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
379         (const char *file, int line))
380         {
381         dynlock_create_callback=func;
382         }
383
384 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
385         struct CRYPTO_dynlock_value *l, const char *file, int line))
386         {
387         dynlock_lock_callback=func;
388         }
389
390 void CRYPTO_set_dynlock_destroy_callback(void (*func)
391         (struct CRYPTO_dynlock_value *l, const char *file, int line))
392         {
393         dynlock_destroy_callback=func;
394         }
395
396
397 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
398                 int line)
399         {
400         return(locking_callback);
401         }
402
403 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
404                                           const char *file,int line)
405         {
406         return(add_lock_callback);
407         }
408
409 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
410                                               const char *file,int line))
411         {
412         locking_callback=func;
413         }
414
415 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
416                                               const char *file,int line))
417         {
418         add_lock_callback=func;
419         }
420
421 /* the memset() here and in set_pointer() seem overkill, but for the sake of
422  * CRYPTO_THREADID_cmp() this avoids any platform silliness that might cause two
423  * "equal" THREADID structs to not be memcmp()-identical. */
424 void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val)
425         {
426         memset(id, 0, sizeof(*id));
427         id->val = val;
428         }
429
430 static const unsigned char hash_coeffs[] = { 3, 5, 7, 11, 13, 17, 19, 23 };
431 void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr)
432         {
433         unsigned char *dest = (void *)&id->val;
434         unsigned int accum = 0;
435         unsigned char dnum = sizeof(id->val);
436
437         memset(id, 0, sizeof(*id));
438         id->ptr = ptr;
439         if (sizeof(id->val) >= sizeof(id->ptr))
440                 {
441                 /* 'ptr' can be embedded in 'val' without loss of uniqueness */
442                 id->val = (unsigned long)id->ptr;
443                 return;
444                 }
445         /* hash ptr ==> val. Each byte of 'val' gets the mod-256 total of a
446          * linear function over the bytes in 'ptr', the co-efficients of which
447          * are a sequence of low-primes (hash_coeffs is an 8-element cycle) -
448          * the starting prime for the sequence varies for each byte of 'val'
449          * (unique polynomials unless pointers are >64-bit). For added spice,
450          * the totals accumulate rather than restarting from zero, and the index
451          * of the 'val' byte is added each time (position dependence). If I was
452          * a black-belt, I'd scan big-endian pointers in reverse to give
453          * low-order bits more play, but this isn't crypto and I'd prefer nobody
454          * mistake it as such. Plus I'm lazy. */
455         while (dnum--)
456                 {
457                 const unsigned char *src = (void *)&id->ptr;
458                 unsigned char snum = sizeof(id->ptr);
459                 while (snum--)
460                         accum += *(src++) * hash_coeffs[(snum + dnum) & 7];
461                 accum += dnum;
462                 *(dest++) = accum & 255;
463                 }
464         }
465
466 int CRYPTO_THREADID_set_callback(void (*func)(CRYPTO_THREADID *))
467         {
468         if (threadid_callback)
469                 return 0;
470         threadid_callback = func;
471         return 1;
472         }
473
474 void (*CRYPTO_THREADID_get_callback(void))(CRYPTO_THREADID *)
475         {
476         return threadid_callback;
477         }
478
479 void CRYPTO_THREADID_current(CRYPTO_THREADID *id)
480         {
481         if (threadid_callback)
482                 {
483                 threadid_callback(id);
484                 return;
485                 }
486 #ifndef OPENSSL_NO_DEPRECATED
487         /* If the deprecated callback was set, fall back to that */
488         if (id_callback)
489                 {
490                 CRYPTO_THREADID_set_numeric(id, id_callback());
491                 return;
492                 }
493 #endif
494         /* Else pick a backup */
495 #ifdef OPENSSL_SYS_WIN16
496         CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentTask());
497 #elif defined(OPENSSL_SYS_WIN32)
498         CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
499 #elif defined(OPENSSL_SYS_BEOS)
500         CRYPTO_THREADID_set_numeric(id, (unsigned long)find_thread(NULL));
501 #else
502         /* For everything else, default to using the address of 'errno' */
503         CRYPTO_THREADID_set_pointer(id, &errno);
504 #endif
505         }
506
507 int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b)
508         {
509         return memcmp(a, b, sizeof(*a));
510         }
511
512 void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src)
513         {
514         memcpy(dest, src, sizeof(*src));
515         }
516
517 unsigned long CRYPTO_THREADID_hash(const CRYPTO_THREADID *id)
518         {
519         return id->val;
520         }
521
522 #ifndef OPENSSL_NO_DEPRECATED
523 unsigned long (*CRYPTO_get_id_callback(void))(void)
524         {
525         return(id_callback);
526         }
527
528 void CRYPTO_set_id_callback(unsigned long (*func)(void))
529         {
530         id_callback=func;
531         }
532
533 unsigned long CRYPTO_thread_id(void)
534         {
535         unsigned long ret=0;
536
537         if (id_callback == NULL)
538                 {
539 #ifdef OPENSSL_SYS_WIN16
540                 ret=(unsigned long)GetCurrentTask();
541 #elif defined(OPENSSL_SYS_WIN32)
542                 ret=(unsigned long)GetCurrentThreadId();
543 #elif defined(GETPID_IS_MEANINGLESS)
544                 ret=1L;
545 #elif defined(OPENSSL_SYS_BEOS)
546                 ret=(unsigned long)find_thread(NULL);
547 #else
548                 ret=(unsigned long)getpid();
549 #endif
550                 }
551         else
552                 ret=id_callback();
553         return(ret);
554         }
555 #endif
556
557 void CRYPTO_lock(int mode, int type, const char *file, int line)
558         {
559 #ifdef LOCK_DEBUG
560                 {
561                 CRYPTO_THREADID id;
562                 char *rw_text,*operation_text;
563
564                 if (mode & CRYPTO_LOCK)
565                         operation_text="lock  ";
566                 else if (mode & CRYPTO_UNLOCK)
567                         operation_text="unlock";
568                 else
569                         operation_text="ERROR ";
570
571                 if (mode & CRYPTO_READ)
572                         rw_text="r";
573                 else if (mode & CRYPTO_WRITE)
574                         rw_text="w";
575                 else
576                         rw_text="ERROR";
577
578                 CRYPTO_THREADID_current(&id);
579                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
580                         CRYPTO_THREADID_hash(&id), rw_text, operation_text,
581                         CRYPTO_get_lock_name(type), file, line);
582                 }
583 #endif
584         if (type < 0)
585                 {
586                 if (dynlock_lock_callback != NULL)
587                         {
588                         struct CRYPTO_dynlock_value *pointer
589                                 = CRYPTO_get_dynlock_value(type);
590
591                         OPENSSL_assert(pointer != NULL);
592
593                         dynlock_lock_callback(mode, pointer, file, line);
594
595                         CRYPTO_destroy_dynlockid(type);
596                         }
597                 }
598         else
599                 if (locking_callback != NULL)
600                         locking_callback(mode,type,file,line);
601         }
602
603 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
604              int line)
605         {
606         int ret = 0;
607
608         if (add_lock_callback != NULL)
609                 {
610 #ifdef LOCK_DEBUG
611                 int before= *pointer;
612 #endif
613
614                 ret=add_lock_callback(pointer,amount,type,file,line);
615 #ifdef LOCK_DEBUG
616                 {
617                 CRYPTO_THREADID id;
618                 CRYPTO_THREADID_current(&id);
619                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
620                         CRYPTO_THREADID_hash(&id), before,amount,ret,
621                         CRYPTO_get_lock_name(type),
622                         file,line);
623                 }
624 #endif
625                 }
626         else
627                 {
628                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
629
630                 ret= *pointer+amount;
631 #ifdef LOCK_DEBUG
632                 {
633                 CRYPTO_THREADID id;
634                 CRYPTO_THREADID_current(&id);
635                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
636                         CRYPTO_THREADID_hash(&id),
637                         *pointer,amount,ret,
638                         CRYPTO_get_lock_name(type),
639                         file,line);
640                 }
641 #endif
642                 *pointer=ret;
643                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
644                 }
645         return(ret);
646         }
647
648 const char *CRYPTO_get_lock_name(int type)
649         {
650         if (type < 0)
651                 return("dynamic");
652         else if (type < CRYPTO_NUM_LOCKS)
653                 return(lock_names[type]);
654         else if (type-CRYPTO_NUM_LOCKS > sk_OPENSSL_STRING_num(app_locks))
655                 return("ERROR");
656         else
657                 return(sk_OPENSSL_STRING_value(app_locks,type-CRYPTO_NUM_LOCKS));
658         }
659
660 #if     defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
661         defined(__INTEL__) || \
662         defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD64) || defined(_M_X64)
663
664 unsigned long  OPENSSL_ia32cap_P=0;
665 unsigned long *OPENSSL_ia32cap_loc(void) { return &OPENSSL_ia32cap_P; }
666
667 #if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
668 #define OPENSSL_CPUID_SETUP
669 void OPENSSL_cpuid_setup(void)
670 { static int trigger=0;
671   unsigned long OPENSSL_ia32_cpuid(void);
672   char *env;
673
674     if (trigger)        return;
675
676     trigger=1;
677     if ((env=getenv("OPENSSL_ia32cap")))
678         OPENSSL_ia32cap_P = strtoul(env,NULL,0)|(1<<10);
679     else
680         OPENSSL_ia32cap_P = OPENSSL_ia32_cpuid()|(1<<10);
681     /*
682      * |(1<<10) sets a reserved bit to signal that variable
683      * was initialized already... This is to avoid interference
684      * with cpuid snippets in ELF .init segment.
685      */
686 }
687 #endif
688
689 #else
690 unsigned long *OPENSSL_ia32cap_loc(void) { return NULL; }
691 #endif
692 int OPENSSL_NONPIC_relocated = 0;
693 #if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)
694 void OPENSSL_cpuid_setup(void) {}
695 #endif
696
697 #if (defined(_WIN32) || defined(__CYGWIN__)) && defined(_WINDLL)
698 #ifdef __CYGWIN__
699 /* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
700 #include <windows.h>
701 /* this has side-effect of _WIN32 getting defined, which otherwise
702  * is mutually exclusive with __CYGWIN__... */
703 #endif
704
705 /* All we really need to do is remove the 'error' state when a thread
706  * detaches */
707
708 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
709              LPVOID lpvReserved)
710         {
711         switch(fdwReason)
712                 {
713         case DLL_PROCESS_ATTACH:
714                 OPENSSL_cpuid_setup();
715 #if defined(_WIN32_WINNT)
716                 {
717                 IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER *)hinstDLL;
718                 IMAGE_NT_HEADERS *nt_headers;
719
720                 if (dos_header->e_magic==IMAGE_DOS_SIGNATURE)
721                         {
722                         nt_headers = (IMAGE_NT_HEADERS *)((char *)dos_header
723                                                 + dos_header->e_lfanew);
724                         if (nt_headers->Signature==IMAGE_NT_SIGNATURE &&
725                             hinstDLL!=(HINSTANCE)(nt_headers->OptionalHeader.ImageBase))
726                                 OPENSSL_NONPIC_relocated=1;
727                         }
728                 }
729 #endif
730                 break;
731         case DLL_THREAD_ATTACH:
732                 break;
733         case DLL_THREAD_DETACH:
734                 ERR_remove_state(0);
735                 break;
736         case DLL_PROCESS_DETACH:
737                 break;
738                 }
739         return(TRUE);
740         }
741 #endif
742
743 #if defined(_WIN32) && !defined(__CYGWIN__)
744 #include <tchar.h>
745 #include <signal.h>
746
747 #if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
748 int OPENSSL_isservice(void)
749 { HWINSTA h;
750   DWORD len;
751   WCHAR *name;
752
753     (void)GetDesktopWindow(); /* return value is ignored */
754
755     h = GetProcessWindowStation();
756     if (h==NULL) return -1;
757
758     if (GetUserObjectInformationW (h,UOI_NAME,NULL,0,&len) ||
759         GetLastError() != ERROR_INSUFFICIENT_BUFFER)
760         return -1;
761
762     if (len>512) return -1;             /* paranoia */
763     len++,len&=~1;                      /* paranoia */
764 #ifdef _MSC_VER
765     name=(WCHAR *)_alloca(len+sizeof(WCHAR));
766 #else
767     name=(WCHAR *)alloca(len+sizeof(WCHAR));
768 #endif
769     if (!GetUserObjectInformationW (h,UOI_NAME,name,len,&len))
770         return -1;
771
772     len++,len&=~1;                      /* paranoia */
773     name[len/sizeof(WCHAR)]=L'\0';      /* paranoia */
774 #if 1
775     /* This doesn't cover "interactive" services [working with real
776      * WinSta0's] nor programs started non-interactively by Task
777      * Scheduler [those are working with SAWinSta]. */
778     if (wcsstr(name,L"Service-0x"))     return 1;
779 #else
780     /* This covers all non-interactive programs such as services. */
781     if (!wcsstr(name,L"WinSta0"))       return 1;
782 #endif
783     else                                return 0;
784 }
785 #else
786 int OPENSSL_isservice(void) { return 0; }
787 #endif
788
789 void OPENSSL_showfatal (const char *fmta,...)
790 { va_list ap;
791   TCHAR buf[256];
792   const TCHAR *fmt;
793 #ifdef STD_ERROR_HANDLE /* what a dirty trick! */
794   HANDLE h;
795
796     if ((h=GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
797         GetFileType(h)!=FILE_TYPE_UNKNOWN)
798     {   /* must be console application */
799         va_start (ap,fmta);
800         vfprintf (stderr,fmta,ap);
801         va_end (ap);
802         return;
803     }
804 #endif
805
806     if (sizeof(TCHAR)==sizeof(char))
807         fmt=(const TCHAR *)fmta;
808     else do
809     { int    keepgoing;
810       size_t len_0=strlen(fmta)+1,i;
811       WCHAR *fmtw;
812
813 #ifdef _MSC_VER
814         fmtw = (WCHAR *)_alloca (len_0*sizeof(WCHAR));
815 #else
816         fmtw = (WCHAR *)alloca (len_0*sizeof(WCHAR));
817 #endif
818         if (fmtw == NULL) { fmt=(const TCHAR *)L"no stack?"; break; }
819
820 #ifndef OPENSSL_NO_MULTIBYTE
821         if (!MultiByteToWideChar(CP_ACP,0,fmta,len_0,fmtw,len_0))
822 #endif
823             for (i=0;i<len_0;i++) fmtw[i]=(WCHAR)fmta[i];
824
825         for (i=0;i<len_0;i++)
826         {   if (fmtw[i]==L'%') do
827             {   keepgoing=0;
828                 switch (fmtw[i+1])
829                 {   case L'0': case L'1': case L'2': case L'3': case L'4':
830                     case L'5': case L'6': case L'7': case L'8': case L'9':
831                     case L'.': case L'*':
832                     case L'-':  i++; keepgoing=1; break;
833                     case L's':  fmtw[i+1]=L'S';   break;
834                     case L'S':  fmtw[i+1]=L's';   break;
835                     case L'c':  fmtw[i+1]=L'C';   break;
836                     case L'C':  fmtw[i+1]=L'c';   break;
837                 }
838             } while (keepgoing);
839         }
840         fmt = (const TCHAR *)fmtw;
841     } while (0);
842
843     va_start (ap,fmta);
844     _vsntprintf (buf,sizeof(buf)/sizeof(TCHAR)-1,fmt,ap);
845     buf [sizeof(buf)/sizeof(TCHAR)-1] = _T('\0');
846     va_end (ap);
847
848 #if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
849     /* this -------------v--- guards NT-specific calls */
850     if (GetVersion() < 0x80000000 && OPENSSL_isservice() > 0)
851     {   HANDLE h = RegisterEventSource(0,_T("OPENSSL"));
852         const TCHAR *pmsg=buf;
853         ReportEvent(h,EVENTLOG_ERROR_TYPE,0,0,0,1,0,&pmsg,0);
854         DeregisterEventSource(h);
855     }
856     else
857 #endif
858         MessageBox (NULL,buf,_T("OpenSSL: FATAL"),MB_OK|MB_ICONSTOP);
859 }
860 #else
861 void OPENSSL_showfatal (const char *fmta,...)
862 { va_list ap;
863
864     va_start (ap,fmta);
865     vfprintf (stderr,fmta,ap);
866     va_end (ap);
867 }
868 int OPENSSL_isservice (void) { return 0; }
869 #endif
870
871 void OpenSSLDie(const char *file,int line,const char *assertion)
872         {
873         OPENSSL_showfatal(
874                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
875                 file,line,assertion);
876 #if !defined(_WIN32) || defined(__CYGWIN__)
877         abort();
878 #else
879         /* Win32 abort() customarily shows a dialog, but we just did that... */
880         raise(SIGABRT);
881         _exit(3);
882 #endif
883         }
884
885 void *OPENSSL_stderr(void)      { return stderr; }