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 #ifdef FIPS
  70 int FIPS_mode;
  71 void *FIPS_rand_check;
  72 #endif /* def FIPS */
  73
  74 DECLARE_STACK_OF(CRYPTO_dynlock)
  75 IMPLEMENT_STACK_OF(CRYPTO_dynlock)
  76
  77 /* real #defines in crypto.h, keep these upto date */
  78 static const char* lock_names[CRYPTO_NUM_LOCKS] =
  79         {
  80         "<<ERROR>>",
  81         "err",
  82         "ex_data",
  83         "x509",
  84         "x509_info",
  85         "x509_pkey",
  86         "x509_crl",
  87         "x509_req",
  88         "dsa",
  89         "rsa",
  90         "evp_pkey",
  91         "x509_store",
  92         "ssl_ctx",
  93         "ssl_cert",
  94         "ssl_session",
  95         "ssl_sess_cert",
  96         "ssl",
  97         "ssl_method",
  98         "rand",
  99         "rand2",
 100         "debug_malloc",
 101         "BIO",
 102         "gethostbyname",
 103         "getservbyname",
 104         "readdir",
 105         "RSA_blinding",
 106         "dh",
 107         "debug_malloc2",
 108         "dso",
 109         "dynlock",
 110         "engine",
 111         "ui",
 112         "hwcrhk",               /* This is a HACK which will disappear in 0.9.8 */
 113 #if CRYPTO_NUM_LOCKS != 33
 114 # error "Inconsistency between crypto.h and cryptlib.c"
 115 #endif
 116         };
 117
 118 /* This is for applications to allocate new type names in the non-dynamic
 119    array of lock names.  These are numbered with positive numbers.  */
 120 static STACK *app_locks=NULL;
 121
 122 /* For applications that want a more dynamic way of handling threads, the
 123    following stack is used.  These are externally numbered with negative
 124    numbers.  */
 125 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 126
 127
 128 static void (MS_FAR *locking_callback)(int mode,int type,
 129         const char *file,int line)=NULL;
 130 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 131         int type,const char *file,int line)=NULL;
 132 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 133 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 134         (const char *file,int line)=NULL;
 135 static void (MS_FAR *dynlock_lock_callback)(int mode,
 136         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 137 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 138         const char *file,int line)=NULL;
 139
 140 int CRYPTO_get_new_lockid(char *name)
 141         {
 142         char *str;
 143         int i;
 144
 145 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 146         /* A hack to make Visual C++ 5.0 work correctly when linking as
 147          * a DLL using /MT. Without this, the application cannot use
 148          * and floating point printf's.
 149          * It also seems to be needed for Visual C 1.5 (win16) */
 150         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 151 #endif
 152
 153         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 154                 {
 155                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 156                 return(0);
 157                 }
 158         if ((str=BUF_strdup(name)) == NULL)
 159                 {
 160                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 161                 return(0);
 162                 }
 163         i=sk_push(app_locks,str);
 164         if (!i)
 165                 OPENSSL_free(str);
 166         else
 167                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 168         return(i);
 169         }
 170
 171 int CRYPTO_num_locks(void)
 172         {
 173         return CRYPTO_NUM_LOCKS;
 174         }
 175
 176 int CRYPTO_get_new_dynlockid(void)
 177         {
 178         int i = 0;
 179         CRYPTO_dynlock *pointer = NULL;
 180
 181         if (dynlock_create_callback == NULL)
 182                 {
 183                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 184                 return(0);
 185                 }
 186         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 187         if ((dyn_locks == NULL)
 188                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 189                 {
 190                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 191                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 192                 return(0);
 193                 }
 194         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 195
 196         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 197         if (pointer == NULL)
 198                 {
 199                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 200                 return(0);
 201                 }
 202         pointer->references = 1;
 203         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 204         if (pointer->data == NULL)
 205                 {
 206                 OPENSSL_free(pointer);
 207                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 208                 return(0);
 209                 }
 210
 211         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 212         /* First, try to find an existing empty slot */
 213         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 214         /* If there was none, push, thereby creating a new one */
 215         if (i == -1)
 216                 /* Since sk_push() returns the number of items on the
 217                    stack, not the location of the pushed item, we need
 218                    to transform the returned number into a position,
 219                    by decreasing it.  */
 220                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
 221         else
 222                 /* If we found a place with a NULL pointer, put our pointer
 223                    in it.  */
 224                 sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
 225         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 226
 227         if (i == -1)
 228                 {
 229                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 230                 OPENSSL_free(pointer);
 231                 }
 232         else
 233                 i += 1; /* to avoid 0 */
 234         return -i;
 235         }
 236
 237 void CRYPTO_destroy_dynlockid(int i)
 238         {
 239         CRYPTO_dynlock *pointer = NULL;
 240         if (i)
 241                 i = -i-1;
 242         if (dynlock_destroy_callback == NULL)
 243                 return;
 244
 245         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 246
 247         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 248                 {
 249                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 250                 return;
 251                 }
 252         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 253         if (pointer != NULL)
 254                 {
 255                 --pointer->references;
 256 #ifdef REF_CHECK
 257                 if (pointer->references < 0)
 258                         {
 259                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 260                         abort();
 261                         }
 262                 else
 263 #endif
 264                         if (pointer->references <= 0)
 265                                 {
 266                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 267                                 }
 268                         else
 269                                 pointer = NULL;
 270                 }
 271         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 272
 273         if (pointer)
 274                 {
 275                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 276                 OPENSSL_free(pointer);
 277                 }
 278         }
 279
 280 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 281         {
 282         CRYPTO_dynlock *pointer = NULL;
 283         if (i)
 284                 i = -i-1;
 285
 286         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 287
 288         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 289                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 290         if (pointer)
 291                 pointer->references++;
 292
 293         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 294
 295         if (pointer)
 296                 return pointer->data;
 297         return NULL;
 298         }
 299
 300 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 301         (const char *file,int line)
 302         {
 303         return(dynlock_create_callback);
 304         }
 305
 306 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 307         struct CRYPTO_dynlock_value *l, const char *file,int line)
 308         {
 309         return(dynlock_lock_callback);
 310         }
 311
 312 void (*CRYPTO_get_dynlock_destroy_callback(void))
 313         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 314         {
 315         return(dynlock_destroy_callback);
 316         }
 317
 318 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 319         (const char *file, int line))
 320         {
 321         dynlock_create_callback=func;
 322         }
 323
 324 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 325         struct CRYPTO_dynlock_value *l, const char *file, int line))
 326         {
 327         dynlock_lock_callback=func;
 328         }
 329
 330 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 331         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 332         {
 333         dynlock_destroy_callback=func;
 334         }
 335
 336
 337 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 338                 int line)
 339         {
 340         return(locking_callback);
 341         }
 342
 343 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 344                                           const char *file,int line)
 345         {
 346         return(add_lock_callback);
 347         }
 348
 349 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 350                                               const char *file,int line))
 351         {
 352         locking_callback=func;
 353         }
 354
 355 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 356                                               const char *file,int line))
 357         {
 358         add_lock_callback=func;
 359         }
 360
 361 unsigned long (*CRYPTO_get_id_callback(void))(void)
 362         {
 363         return(id_callback);
 364         }
 365
 366 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 367         {
 368         id_callback=func;
 369         }
 370
 371 unsigned long CRYPTO_thread_id(void)
 372         {
 373         unsigned long ret=0;
 374
 375         if (id_callback == NULL)
 376                 {
 377 #ifdef OPENSSL_SYS_WIN16
 378                 ret=(unsigned long)GetCurrentTask();
 379 #elif defined(OPENSSL_SYS_WIN32)
 380                 ret=(unsigned long)GetCurrentThreadId();
 381 #elif defined(GETPID_IS_MEANINGLESS)
 382                 ret=1L;
 383 #else
 384                 ret=(unsigned long)getpid();
 385 #endif
 386                 }
 387         else
 388                 ret=id_callback();
 389         return(ret);
 390         }
 391
 392 void CRYPTO_lock(int mode, int type, const char *file, int line)
 393         {
 394 #ifdef LOCK_DEBUG
 395                 {
 396                 char *rw_text,*operation_text;
 397
 398                 if (mode & CRYPTO_LOCK)
 399                         operation_text="lock  ";
 400                 else if (mode & CRYPTO_UNLOCK)
 401                         operation_text="unlock";
 402                 else
 403                         operation_text="ERROR ";
 404
 405                 if (mode & CRYPTO_READ)
 406                         rw_text="r";
 407                 else if (mode & CRYPTO_WRITE)
 408                         rw_text="w";
 409                 else
 410                         rw_text="ERROR";
 411
 412                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 413                         CRYPTO_thread_id(), rw_text, operation_text,
 414                         CRYPTO_get_lock_name(type), file, line);
 415                 }
 416 #endif
 417         if (type < 0)
 418                 {
 419                 if (dynlock_lock_callback != NULL)
 420                         {
 421                         struct CRYPTO_dynlock_value *pointer
 422                                 = CRYPTO_get_dynlock_value(type);
 423
 424                         OPENSSL_assert(pointer != NULL);
 425
 426                         dynlock_lock_callback(mode, pointer, file, line);
 427
 428                         CRYPTO_destroy_dynlockid(type);
 429                         }
 430                 }
 431         else
 432                 if (locking_callback != NULL)
 433                         locking_callback(mode,type,file,line);
 434         }
 435
 436 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 437              int line)
 438         {
 439         int ret = 0;
 440
 441         if (add_lock_callback != NULL)
 442                 {
 443 #ifdef LOCK_DEBUG
 444                 int before= *pointer;
 445 #endif
 446
 447                 ret=add_lock_callback(pointer,amount,type,file,line);
 448 #ifdef LOCK_DEBUG
 449                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 450                         CRYPTO_thread_id(),
 451                         before,amount,ret,
 452                         CRYPTO_get_lock_name(type),
 453                         file,line);
 454 #endif
 455                 }
 456         else
 457                 {
 458                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 459
 460                 ret= *pointer+amount;
 461 #ifdef LOCK_DEBUG
 462                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 463                         CRYPTO_thread_id(),
 464                         *pointer,amount,ret,
 465                         CRYPTO_get_lock_name(type),
 466                         file,line);
 467 #endif
 468                 *pointer=ret;
 469                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 470                 }
 471         return(ret);
 472         }
 473
 474 const char *CRYPTO_get_lock_name(int type)
 475         {
 476         if (type < 0)
 477                 return("dynamic");
 478         else if (type < CRYPTO_NUM_LOCKS)
 479                 return(lock_names[type]);
 480         else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
 481                 return("ERROR");
 482         else
 483                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 484         }
 485
 486 #ifdef _DLL
 487 #ifdef OPENSSL_SYS_WIN32
 488
 489 /* All we really need to do is remove the 'error' state when a thread
 490  * detaches */
 491
 492 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 493              LPVOID lpvReserved)
 494         {
 495         switch(fdwReason)
 496                 {
 497         case DLL_PROCESS_ATTACH:
 498                 break;
 499         case DLL_THREAD_ATTACH:
 500                 break;
 501         case DLL_THREAD_DETACH:
 502                 ERR_remove_state(0);
 503                 break;
 504         case DLL_PROCESS_DETACH:
 505                 break;
 506                 }
 507         return(TRUE);
 508         }
 509 #endif
 510
 511 #endif
 512
 513 void OpenSSLDie(const char *file,int line,const char *assertion)
 514         {
 515         fprintf(stderr,
 516                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
 517                 file,line,assertion);
 518         abort();
 519         }