crypto/openssl-0.9.7e/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         "fips",
 109         "fips2",
 110 #if CRYPTO_NUM_LOCKS != 35
 111 # error "Inconsistency between crypto.h and cryptlib.c"
 112 #endif
 113         };
 114
 115 /* This is for applications to allocate new type names in the non-dynamic
 116    array of lock names.  These are numbered with positive numbers.  */
 117 static STACK *app_locks=NULL;
 118
 119 /* For applications that want a more dynamic way of handling threads, the
 120    following stack is used.  These are externally numbered with negative
 121    numbers.  */
 122 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 123
 124
 125 static void (MS_FAR *locking_callback)(int mode,int type,
 126         const char *file,int line)=NULL;
 127 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 128         int type,const char *file,int line)=NULL;
 129 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 130 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 131         (const char *file,int line)=NULL;
 132 static void (MS_FAR *dynlock_lock_callback)(int mode,
 133         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 134 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 135         const char *file,int line)=NULL;
 136
 137 int CRYPTO_get_new_lockid(char *name)
 138         {
 139         char *str;
 140         int i;
 141
 142 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 143         /* A hack to make Visual C++ 5.0 work correctly when linking as
 144          * a DLL using /MT. Without this, the application cannot use
 145          * and floating point printf's.
 146          * It also seems to be needed for Visual C 1.5 (win16) */
 147         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 148 #endif
 149
 150         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 151                 {
 152                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 153                 return(0);
 154                 }
 155         if ((str=BUF_strdup(name)) == NULL)
 156                 {
 157                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 158                 return(0);
 159                 }
 160         i=sk_push(app_locks,str);
 161         if (!i)
 162                 OPENSSL_free(str);
 163         else
 164                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 165         return(i);
 166         }
 167
 168 int CRYPTO_num_locks(void)
 169         {
 170         return CRYPTO_NUM_LOCKS;
 171         }
 172
 173 int CRYPTO_get_new_dynlockid(void)
 174         {
 175         int i = 0;
 176         CRYPTO_dynlock *pointer = NULL;
 177
 178         if (dynlock_create_callback == NULL)
 179                 {
 180                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 181                 return(0);
 182                 }
 183         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 184         if ((dyn_locks == NULL)
 185                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 186                 {
 187                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 188                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 189                 return(0);
 190                 }
 191         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 192
 193         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 194         if (pointer == NULL)
 195                 {
 196                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 197                 return(0);
 198                 }
 199         pointer->references = 1;
 200         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 201         if (pointer->data == NULL)
 202                 {
 203                 OPENSSL_free(pointer);
 204                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 205                 return(0);
 206                 }
 207
 208         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 209         /* First, try to find an existing empty slot */
 210         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 211         /* If there was none, push, thereby creating a new one */
 212         if (i == -1)
 213                 /* Since sk_push() returns the number of items on the
 214                    stack, not the location of the pushed item, we need
 215                    to transform the returned number into a position,
 216                    by decreasing it.  */
 217                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
 218         else
 219                 /* If we found a place with a NULL pointer, put our pointer
 220                    in it.  */
 221                 sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
 222         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 223
 224         if (i == -1)
 225                 {
 226                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 227                 OPENSSL_free(pointer);
 228                 }
 229         else
 230                 i += 1; /* to avoid 0 */
 231         return -i;
 232         }
 233
 234 void CRYPTO_destroy_dynlockid(int i)
 235         {
 236         CRYPTO_dynlock *pointer = NULL;
 237         if (i)
 238                 i = -i-1;
 239         if (dynlock_destroy_callback == NULL)
 240                 return;
 241
 242         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 243
 244         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 245                 {
 246                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 247                 return;
 248                 }
 249         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 250         if (pointer != NULL)
 251                 {
 252                 --pointer->references;
 253 #ifdef REF_CHECK
 254                 if (pointer->references < 0)
 255                         {
 256                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 257                         abort();
 258                         }
 259                 else
 260 #endif
 261                         if (pointer->references <= 0)
 262                                 {
 263                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 264                                 }
 265                         else
 266                                 pointer = NULL;
 267                 }
 268         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 269
 270         if (pointer)
 271                 {
 272                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 273                 OPENSSL_free(pointer);
 274                 }
 275         }
 276
 277 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 278         {
 279         CRYPTO_dynlock *pointer = NULL;
 280         if (i)
 281                 i = -i-1;
 282
 283         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 284
 285         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 286                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 287         if (pointer)
 288                 pointer->references++;
 289
 290         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 291
 292         if (pointer)
 293                 return pointer->data;
 294         return NULL;
 295         }
 296
 297 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 298         (const char *file,int line)
 299         {
 300         return(dynlock_create_callback);
 301         }
 302
 303 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 304         struct CRYPTO_dynlock_value *l, const char *file,int line)
 305         {
 306         return(dynlock_lock_callback);
 307         }
 308
 309 void (*CRYPTO_get_dynlock_destroy_callback(void))
 310         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 311         {
 312         return(dynlock_destroy_callback);
 313         }
 314
 315 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 316         (const char *file, int line))
 317         {
 318         dynlock_create_callback=func;
 319         }
 320
 321 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 322         struct CRYPTO_dynlock_value *l, const char *file, int line))
 323         {
 324         dynlock_lock_callback=func;
 325         }
 326
 327 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 328         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 329         {
 330         dynlock_destroy_callback=func;
 331         }
 332
 333
 334 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 335                 int line)
 336         {
 337         return(locking_callback);
 338         }
 339
 340 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 341                                           const char *file,int line)
 342         {
 343         return(add_lock_callback);
 344         }
 345
 346 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 347                                               const char *file,int line))
 348         {
 349         locking_callback=func;
 350         }
 351
 352 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 353                                               const char *file,int line))
 354         {
 355         add_lock_callback=func;
 356         }
 357
 358 unsigned long (*CRYPTO_get_id_callback(void))(void)
 359         {
 360         return(id_callback);
 361         }
 362
 363 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 364         {
 365         id_callback=func;
 366         }
 367
 368 unsigned long CRYPTO_thread_id(void)
 369         {
 370         unsigned long ret=0;
 371
 372         if (id_callback == NULL)
 373                 {
 374 #ifdef OPENSSL_SYS_WIN16
 375                 ret=(unsigned long)GetCurrentTask();
 376 #elif defined(OPENSSL_SYS_WIN32)
 377                 ret=(unsigned long)GetCurrentThreadId();
 378 #elif defined(GETPID_IS_MEANINGLESS)
 379                 ret=1L;
 380 #else
 381                 ret=(unsigned long)getpid();
 382 #endif
 383                 }
 384         else
 385                 ret=id_callback();
 386         return(ret);
 387         }
 388
 389 void CRYPTO_lock(int mode, int type, const char *file, int line)
 390         {
 391 #ifdef LOCK_DEBUG
 392                 {
 393                 char *rw_text,*operation_text;
 394
 395                 if (mode & CRYPTO_LOCK)
 396                         operation_text="lock  ";
 397                 else if (mode & CRYPTO_UNLOCK)
 398                         operation_text="unlock";
 399                 else
 400                         operation_text="ERROR ";
 401
 402                 if (mode & CRYPTO_READ)
 403                         rw_text="r";
 404                 else if (mode & CRYPTO_WRITE)
 405                         rw_text="w";
 406                 else
 407                         rw_text="ERROR";
 408
 409                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 410                         CRYPTO_thread_id(), rw_text, operation_text,
 411                         CRYPTO_get_lock_name(type), file, line);
 412                 }
 413 #endif
 414         if (type < 0)
 415                 {
 416                 if (dynlock_lock_callback != NULL)
 417                         {
 418                         struct CRYPTO_dynlock_value *pointer
 419                                 = CRYPTO_get_dynlock_value(type);
 420
 421                         OPENSSL_assert(pointer != NULL);
 422
 423                         dynlock_lock_callback(mode, pointer, file, line);
 424
 425                         CRYPTO_destroy_dynlockid(type);
 426                         }
 427                 }
 428         else
 429                 if (locking_callback != NULL)
 430                         locking_callback(mode,type,file,line);
 431         }
 432
 433 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 434              int line)
 435         {
 436         int ret = 0;
 437
 438         if (add_lock_callback != NULL)
 439                 {
 440 #ifdef LOCK_DEBUG
 441                 int before= *pointer;
 442 #endif
 443
 444                 ret=add_lock_callback(pointer,amount,type,file,line);
 445 #ifdef LOCK_DEBUG
 446                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 447                         CRYPTO_thread_id(),
 448                         before,amount,ret,
 449                         CRYPTO_get_lock_name(type),
 450                         file,line);
 451 #endif
 452                 }
 453         else
 454                 {
 455                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 456
 457                 ret= *pointer+amount;
 458 #ifdef LOCK_DEBUG
 459                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 460                         CRYPTO_thread_id(),
 461                         *pointer,amount,ret,
 462                         CRYPTO_get_lock_name(type),
 463                         file,line);
 464 #endif
 465                 *pointer=ret;
 466                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 467                 }
 468         return(ret);
 469         }
 470
 471 const char *CRYPTO_get_lock_name(int type)
 472         {
 473         if (type < 0)
 474                 return("dynamic");
 475         else if (type < CRYPTO_NUM_LOCKS)
 476                 return(lock_names[type]);
 477         else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
 478                 return("ERROR");
 479         else
 480                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 481         }
 482
 483 #ifdef _DLL
 484 #ifdef OPENSSL_SYS_WIN32
 485
 486 /* All we really need to do is remove the 'error' state when a thread
 487  * detaches */
 488
 489 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 490              LPVOID lpvReserved)
 491         {
 492         switch(fdwReason)
 493                 {
 494         case DLL_PROCESS_ATTACH:
 495                 break;
 496         case DLL_THREAD_ATTACH:
 497                 break;
 498         case DLL_THREAD_DETACH:
 499                 ERR_remove_state(0);
 500                 break;
 501         case DLL_PROCESS_DETACH:
 502                 break;
 503                 }
 504         return(TRUE);
 505         }
 506 #endif
 507
 508 #endif
 509
 510 void OpenSSLDie(const char *file,int line,const char *assertion)
 511         {
 512         fprintf(stderr,
 513                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
 514                 file,line,assertion);
 515         abort();
 516         }
 517
 518 #ifdef OPENSSL_FIPS
 519 static int fips_started = 0;
 520 static int fips_mode = 0;
 521 static void *fips_rand_check = 0;
 522 static unsigned long fips_thread = 0;
 523
 524 void fips_set_started(void)
 525         {
 526         fips_started = 1;
 527         }
 528
 529 int fips_is_started(void)
 530         {
 531         return fips_started;
 532         }
 533
 534 int fips_is_owning_thread(void)
 535         {
 536         int ret = 0;
 537
 538         if (fips_is_started())
 539                 {
 540                 CRYPTO_r_lock(CRYPTO_LOCK_FIPS2);
 541                 if (fips_thread != 0 && fips_thread == CRYPTO_thread_id())
 542                         ret = 1;
 543                 CRYPTO_r_unlock(CRYPTO_LOCK_FIPS2);
 544                 }
 545         return ret;
 546         }
 547
 548 int fips_set_owning_thread(void)
 549         {
 550         int ret = 0;
 551
 552         if (fips_is_started())
 553                 {
 554                 CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
 555                 if (fips_thread == 0)
 556                         {
 557                         fips_thread = CRYPTO_thread_id();
 558                         ret = 1;
 559                         }
 560                 CRYPTO_w_unlock(CRYPTO_LOCK_FIPS2);
 561                 }
 562         return ret;
 563         }
 564
 565 int fips_clear_owning_thread(void)
 566         {
 567         int ret = 0;
 568
 569         if (fips_is_started())
 570                 {
 571                 CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
 572                 if (fips_thread == CRYPTO_thread_id())
 573                         {
 574                         fips_thread = 0;
 575                         ret = 1;
 576                         }
 577                 CRYPTO_w_unlock(CRYPTO_LOCK_FIPS2);
 578                 }
 579         return ret;
 580         }
 581
 582 void fips_set_mode(int onoff)
 583         {
 584         int owning_thread = fips_is_owning_thread();
 585
 586         if (fips_is_started())
 587                 {
 588                 if (!owning_thread) CRYPTO_w_lock(CRYPTO_LOCK_FIPS);
 589                 fips_mode = onoff;
 590                 if (!owning_thread) CRYPTO_w_unlock(CRYPTO_LOCK_FIPS);
 591                 }
 592         }
 593
 594 void fips_set_rand_check(void *rand_check)
 595         {
 596         int owning_thread = fips_is_owning_thread();
 597
 598         if (fips_is_started())
 599                 {
 600                 if (!owning_thread) CRYPTO_w_lock(CRYPTO_LOCK_FIPS);
 601                 fips_rand_check = rand_check;
 602                 if (!owning_thread) CRYPTO_w_unlock(CRYPTO_LOCK_FIPS);
 603                 }
 604         }
 605
 606 int FIPS_mode(void)
 607         {
 608         int ret = 0;
 609         int owning_thread = fips_is_owning_thread();
 610
 611         if (fips_is_started())
 612                 {
 613                 if (!owning_thread) CRYPTO_r_lock(CRYPTO_LOCK_FIPS);
 614                 ret = fips_mode;
 615                 if (!owning_thread) CRYPTO_r_unlock(CRYPTO_LOCK_FIPS);
 616                 }
 617         return ret;
 618         }
 619
 620 void *FIPS_rand_check(void)
 621         {
 622         void *ret = 0;
 623         int owning_thread = fips_is_owning_thread();
 624
 625         if (fips_is_started())
 626                 {
 627                 if (!owning_thread) CRYPTO_r_lock(CRYPTO_LOCK_FIPS);
 628                 ret = fips_rand_check;
 629                 if (!owning_thread) CRYPTO_r_unlock(CRYPTO_LOCK_FIPS);
 630                 }
 631         return ret;
 632         }
 633
 634 #endif /* OPENSSL_FIPS */
 635