crypto/openssl-0.9.7d/crypto/cryptlib.c

   1 /* crypto/cryptlib.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   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.
   8  *
   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).
  15  *
  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.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  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)"
  40  *
  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
  51  * SUCH DAMAGE.
  52  *
  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.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <string.h>
  61 #include "cryptlib.h"
  62 #include <openssl/crypto.h>
  63 #include <openssl/safestack.h>
  64
  65 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
  66 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
  67 #endif
  68
  69 DECLARE_STACK_OF(CRYPTO_dynlock)
  70 IMPLEMENT_STACK_OF(CRYPTO_dynlock)
  71
  72 /* real #defines in crypto.h, keep these upto date */
  73 static const char* lock_names[CRYPTO_NUM_LOCKS] =
  74         {
  75         "<<ERROR>>",
  76         "err",
  77         "ex_data",
  78         "x509",
  79         "x509_info",
  80         "x509_pkey",
  81         "x509_crl",
  82         "x509_req",
  83         "dsa",
  84         "rsa",
  85         "evp_pkey",
  86         "x509_store",
  87         "ssl_ctx",
  88         "ssl_cert",
  89         "ssl_session",
  90         "ssl_sess_cert",
  91         "ssl",
  92         "ssl_method",
  93         "rand",
  94         "rand2",
  95         "debug_malloc",
  96         "BIO",
  97         "gethostbyname",
  98         "getservbyname",
  99         "readdir",
 100         "RSA_blinding",
 101         "dh",
 102         "debug_malloc2",
 103         "dso",
 104         "dynlock",
 105         "engine",
 106         "ui",
 107         "hwcrhk",               /* This is a HACK which will disappear in 0.9.8 */
 108 #if CRYPTO_NUM_LOCKS != 33
 109 # error "Inconsistency between crypto.h and cryptlib.c"
 110 #endif
 111         };
 112
 113 /* This is for applications to allocate new type names in the non-dynamic
 114    array of lock names.  These are numbered with positive numbers.  */
 115 static STACK *app_locks=NULL;
 116
 117 /* For applications that want a more dynamic way of handling threads, the
 118    following stack is used.  These are externally numbered with negative
 119    numbers.  */
 120 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 121
 122
 123 static void (MS_FAR *locking_callback)(int mode,int type,
 124         const char *file,int line)=NULL;
 125 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 126         int type,const char *file,int line)=NULL;
 127 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 128 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 129         (const char *file,int line)=NULL;
 130 static void (MS_FAR *dynlock_lock_callback)(int mode,
 131         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 132 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 133         const char *file,int line)=NULL;
 134
 135 int CRYPTO_get_new_lockid(char *name)
 136         {
 137         char *str;
 138         int i;
 139
 140 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 141         /* A hack to make Visual C++ 5.0 work correctly when linking as
 142          * a DLL using /MT. Without this, the application cannot use
 143          * and floating point printf's.
 144          * It also seems to be needed for Visual C 1.5 (win16) */
 145         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 146 #endif
 147
 148         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 149                 {
 150                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 151                 return(0);
 152                 }
 153         if ((str=BUF_strdup(name)) == NULL)
 154                 {
 155                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 156                 return(0);
 157                 }
 158         i=sk_push(app_locks,str);
 159         if (!i)
 160                 OPENSSL_free(str);
 161         else
 162                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 163         return(i);
 164         }
 165
 166 int CRYPTO_num_locks(void)
 167         {
 168         return CRYPTO_NUM_LOCKS;
 169         }
 170
 171 int CRYPTO_get_new_dynlockid(void)
 172         {
 173         int i = 0;
 174         CRYPTO_dynlock *pointer = NULL;
 175
 176         if (dynlock_create_callback == NULL)
 177                 {
 178                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 179                 return(0);
 180                 }
 181         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 182         if ((dyn_locks == NULL)
 183                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 184                 {
 185                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 186                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 187                 return(0);
 188                 }
 189         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 190
 191         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 192         if (pointer == NULL)
 193                 {
 194                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 195                 return(0);
 196                 }
 197         pointer->references = 1;
 198         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 199         if (pointer->data == NULL)
 200                 {
 201                 OPENSSL_free(pointer);
 202                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 203                 return(0);
 204                 }
 205
 206         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 207         /* First, try to find an existing empty slot */
 208         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 209         /* If there was none, push, thereby creating a new one */
 210         if (i == -1)
 211                 /* Since sk_push() returns the number of items on the
 212                    stack, not the location of the pushed item, we need
 213                    to transform the returned number into a position,
 214                    by decreasing it.  */
 215                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
 216         else
 217                 /* If we found a place with a NULL pointer, put our pointer
 218                    in it.  */
 219                 sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
 220         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 221
 222         if (i == -1)
 223                 {
 224                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 225                 OPENSSL_free(pointer);
 226                 }
 227         else
 228                 i += 1; /* to avoid 0 */
 229         return -i;
 230         }
 231
 232 void CRYPTO_destroy_dynlockid(int i)
 233         {
 234         CRYPTO_dynlock *pointer = NULL;
 235         if (i)
 236                 i = -i-1;
 237         if (dynlock_destroy_callback == NULL)
 238                 return;
 239
 240         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 241
 242         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 243                 {
 244                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 245                 return;
 246                 }
 247         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 248         if (pointer != NULL)
 249                 {
 250                 --pointer->references;
 251 #ifdef REF_CHECK
 252                 if (pointer->references < 0)
 253                         {
 254                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 255                         abort();
 256                         }
 257                 else
 258 #endif
 259                         if (pointer->references <= 0)
 260                                 {
 261                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 262                                 }
 263                         else
 264                                 pointer = NULL;
 265                 }
 266         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 267
 268         if (pointer)
 269                 {
 270                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 271                 OPENSSL_free(pointer);
 272                 }
 273         }
 274
 275 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 276         {
 277         CRYPTO_dynlock *pointer = NULL;
 278         if (i)
 279                 i = -i-1;
 280
 281         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 282
 283         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 284                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 285         if (pointer)
 286                 pointer->references++;
 287
 288         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 289
 290         if (pointer)
 291                 return pointer->data;
 292         return NULL;
 293         }
 294
 295 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 296         (const char *file,int line)
 297         {
 298         return(dynlock_create_callback);
 299         }
 300
 301 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 302         struct CRYPTO_dynlock_value *l, const char *file,int line)
 303         {
 304         return(dynlock_lock_callback);
 305         }
 306
 307 void (*CRYPTO_get_dynlock_destroy_callback(void))
 308         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 309         {
 310         return(dynlock_destroy_callback);
 311         }
 312
 313 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 314         (const char *file, int line))
 315         {
 316         dynlock_create_callback=func;
 317         }
 318
 319 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 320         struct CRYPTO_dynlock_value *l, const char *file, int line))
 321         {
 322         dynlock_lock_callback=func;
 323         }
 324
 325 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 326         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 327         {
 328         dynlock_destroy_callback=func;
 329         }
 330
 331
 332 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 333                 int line)
 334         {
 335         return(locking_callback);
 336         }
 337
 338 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 339                                           const char *file,int line)
 340         {
 341         return(add_lock_callback);
 342         }
 343
 344 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 345                                               const char *file,int line))
 346         {
 347         locking_callback=func;
 348         }
 349
 350 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 351                                               const char *file,int line))
 352         {
 353         add_lock_callback=func;
 354         }
 355
 356 unsigned long (*CRYPTO_get_id_callback(void))(void)
 357         {
 358         return(id_callback);
 359         }
 360
 361 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 362         {
 363         id_callback=func;
 364         }
 365
 366 unsigned long CRYPTO_thread_id(void)
 367         {
 368         unsigned long ret=0;
 369
 370         if (id_callback == NULL)
 371                 {
 372 #ifdef OPENSSL_SYS_WIN16
 373                 ret=(unsigned long)GetCurrentTask();
 374 #elif defined(OPENSSL_SYS_WIN32)
 375                 ret=(unsigned long)GetCurrentThreadId();
 376 #elif defined(GETPID_IS_MEANINGLESS)
 377                 ret=1L;
 378 #else
 379                 ret=(unsigned long)getpid();
 380 #endif
 381                 }
 382         else
 383                 ret=id_callback();
 384         return(ret);
 385         }
 386
 387 void CRYPTO_lock(int mode, int type, const char *file, int line)
 388         {
 389 #ifdef LOCK_DEBUG
 390                 {
 391                 char *rw_text,*operation_text;
 392
 393                 if (mode & CRYPTO_LOCK)
 394                         operation_text="lock  ";
 395                 else if (mode & CRYPTO_UNLOCK)
 396                         operation_text="unlock";
 397                 else
 398                         operation_text="ERROR ";
 399
 400                 if (mode & CRYPTO_READ)
 401                         rw_text="r";
 402                 else if (mode & CRYPTO_WRITE)
 403                         rw_text="w";
 404                 else
 405                         rw_text="ERROR";
 406
 407                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 408                         CRYPTO_thread_id(), rw_text, operation_text,
 409                         CRYPTO_get_lock_name(type), file, line);
 410                 }
 411 #endif
 412         if (type < 0)
 413                 {
 414                 if (dynlock_lock_callback != NULL)
 415                         {
 416                         struct CRYPTO_dynlock_value *pointer
 417                                 = CRYPTO_get_dynlock_value(type);
 418
 419                         OPENSSL_assert(pointer != NULL);
 420
 421                         dynlock_lock_callback(mode, pointer, file, line);
 422
 423                         CRYPTO_destroy_dynlockid(type);
 424                         }
 425                 }
 426         else
 427                 if (locking_callback != NULL)
 428                         locking_callback(mode,type,file,line);
 429         }
 430
 431 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 432              int line)
 433         {
 434         int ret = 0;
 435
 436         if (add_lock_callback != NULL)
 437                 {
 438 #ifdef LOCK_DEBUG
 439                 int before= *pointer;
 440 #endif
 441
 442                 ret=add_lock_callback(pointer,amount,type,file,line);
 443 #ifdef LOCK_DEBUG
 444                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 445                         CRYPTO_thread_id(),
 446                         before,amount,ret,
 447                         CRYPTO_get_lock_name(type),
 448                         file,line);
 449 #endif
 450                 }
 451         else
 452                 {
 453                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 454
 455                 ret= *pointer+amount;
 456 #ifdef LOCK_DEBUG
 457                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 458                         CRYPTO_thread_id(),
 459                         *pointer,amount,ret,
 460                         CRYPTO_get_lock_name(type),
 461                         file,line);
 462 #endif
 463                 *pointer=ret;
 464                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 465                 }
 466         return(ret);
 467         }
 468
 469 const char *CRYPTO_get_lock_name(int type)
 470         {
 471         if (type < 0)
 472                 return("dynamic");
 473         else if (type < CRYPTO_NUM_LOCKS)
 474                 return(lock_names[type]);
 475         else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
 476                 return("ERROR");
 477         else
 478                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 479         }
 480
 481 #ifdef _DLL
 482 #ifdef OPENSSL_SYS_WIN32
 483
 484 /* All we really need to do is remove the 'error' state when a thread
 485  * detaches */
 486
 487 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 488              LPVOID lpvReserved)
 489         {
 490         switch(fdwReason)
 491                 {
 492         case DLL_PROCESS_ATTACH:
 493                 break;
 494         case DLL_THREAD_ATTACH:
 495                 break;
 496         case DLL_THREAD_DETACH:
 497                 ERR_remove_state(0);
 498                 break;
 499         case DLL_PROCESS_DETACH:
 500                 break;
 501                 }
 502         return(TRUE);
 503         }
 504 #endif
 505
 506 #endif
 507
 508 void OpenSSLDie(const char *file,int line,const char *assertion)
 509         {
 510         fprintf(stderr,
 511                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
 512                 file,line,assertion);
 513         abort();
 514         }