crypto/cryptlib.c

   1 /* crypto/cryptlib.c */
   2 /* ====================================================================
   3  * Copyright (c) 1998-2003 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 <stdio.h>
 118 #include <string.h>
 119 #include "cryptlib.h"
 120 #include <openssl/crypto.h>
 121 #include <openssl/safestack.h>
 122
 123 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 124 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
 125 #endif
 126
 127 DECLARE_STACK_OF(CRYPTO_dynlock)
 128 IMPLEMENT_STACK_OF(CRYPTO_dynlock)
 129
 130 /* real #defines in crypto.h, keep these upto date */
 131 static const char* lock_names[CRYPTO_NUM_LOCKS] =
 132         {
 133         "<<ERROR>>",
 134         "err",
 135         "ex_data",
 136         "x509",
 137         "x509_info",
 138         "x509_pkey",
 139         "x509_crl",
 140         "x509_req",
 141         "dsa",
 142         "rsa",
 143         "evp_pkey",
 144         "x509_store",
 145         "ssl_ctx",
 146         "ssl_cert",
 147         "ssl_session",
 148         "ssl_sess_cert",
 149         "ssl",
 150         "ssl_method",
 151         "rand",
 152         "rand2",
 153         "debug_malloc",
 154         "BIO",
 155         "gethostbyname",
 156         "getservbyname",
 157         "readdir",
 158         "RSA_blinding",
 159         "dh",
 160         "debug_malloc2",
 161         "dso",
 162         "dynlock",
 163         "engine",
 164         "ui",
 165         "ecdsa",
 166         "ec",
 167         "ecdh",
 168         "bn",
 169         "ec_pre_comp",
 170         "store",
 171 #if CRYPTO_NUM_LOCKS != 38
 172 # error "Inconsistency between crypto.h and cryptlib.c"
 173 #endif
 174         };
 175
 176 /* This is for applications to allocate new type names in the non-dynamic
 177    array of lock names.  These are numbered with positive numbers.  */
 178 static STACK *app_locks=NULL;
 179
 180 /* For applications that want a more dynamic way of handling threads, the
 181    following stack is used.  These are externally numbered with negative
 182    numbers.  */
 183 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 184
 185
 186 static void (MS_FAR *locking_callback)(int mode,int type,
 187         const char *file,int line)=NULL;
 188 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 189         int type,const char *file,int line)=NULL;
 190 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 191 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 192         (const char *file,int line)=NULL;
 193 static void (MS_FAR *dynlock_lock_callback)(int mode,
 194         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 195 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 196         const char *file,int line)=NULL;
 197
 198 int CRYPTO_get_new_lockid(char *name)
 199         {
 200         char *str;
 201         int i;
 202
 203 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 204         /* A hack to make Visual C++ 5.0 work correctly when linking as
 205          * a DLL using /MT. Without this, the application cannot use
 206          * and floating point printf's.
 207          * It also seems to be needed for Visual C 1.5 (win16) */
 208         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 209 #endif
 210
 211         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 212                 {
 213                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 214                 return(0);
 215                 }
 216         if ((str=BUF_strdup(name)) == NULL)
 217                 {
 218                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 219                 return(0);
 220                 }
 221         i=sk_push(app_locks,str);
 222         if (!i)
 223                 OPENSSL_free(str);
 224         else
 225                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 226         return(i);
 227         }
 228
 229 int CRYPTO_num_locks(void)
 230         {
 231         return CRYPTO_NUM_LOCKS;
 232         }
 233
 234 int CRYPTO_get_new_dynlockid(void)
 235         {
 236         int i = 0;
 237         CRYPTO_dynlock *pointer = NULL;
 238
 239         if (dynlock_create_callback == NULL)
 240                 {
 241                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 242                 return(0);
 243                 }
 244         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 245         if ((dyn_locks == NULL)
 246                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 247                 {
 248                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 249                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 250                 return(0);
 251                 }
 252         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 253
 254         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 255         if (pointer == NULL)
 256                 {
 257                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 258                 return(0);
 259                 }
 260         pointer->references = 1;
 261         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 262         if (pointer->data == NULL)
 263                 {
 264                 OPENSSL_free(pointer);
 265                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 266                 return(0);
 267                 }
 268
 269         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 270         /* First, try to find an existing empty slot */
 271         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 272         /* If there was none, push, thereby creating a new one */
 273         if (i == -1)
 274                 /* Since sk_push() returns the number of items on the
 275                    stack, not the location of the pushed item, we need
 276                    to transform the returned number into a position,
 277                    by decreasing it.  */
 278                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
 279         else
 280                 /* If we found a place with a NULL pointer, put our pointer
 281                    in it.  */
 282                 sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
 283         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 284
 285         if (i == -1)
 286                 {
 287                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 288                 OPENSSL_free(pointer);
 289                 }
 290         else
 291                 i += 1; /* to avoid 0 */
 292         return -i;
 293         }
 294
 295 void CRYPTO_destroy_dynlockid(int i)
 296         {
 297         CRYPTO_dynlock *pointer = NULL;
 298         if (i)
 299                 i = -i-1;
 300         if (dynlock_destroy_callback == NULL)
 301                 return;
 302
 303         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 304
 305         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 306                 {
 307                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 308                 return;
 309                 }
 310         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 311         if (pointer != NULL)
 312                 {
 313                 --pointer->references;
 314 #ifdef REF_CHECK
 315                 if (pointer->references < 0)
 316                         {
 317                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 318                         abort();
 319                         }
 320                 else
 321 #endif
 322                         if (pointer->references <= 0)
 323                                 {
 324                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 325                                 }
 326                         else
 327                                 pointer = NULL;
 328                 }
 329         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 330
 331         if (pointer)
 332                 {
 333                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 334                 OPENSSL_free(pointer);
 335                 }
 336         }
 337
 338 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 339         {
 340         CRYPTO_dynlock *pointer = NULL;
 341         if (i)
 342                 i = -i-1;
 343
 344         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 345
 346         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 347                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 348         if (pointer)
 349                 pointer->references++;
 350
 351         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 352
 353         if (pointer)
 354                 return pointer->data;
 355         return NULL;
 356         }
 357
 358 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 359         (const char *file,int line)
 360         {
 361         return(dynlock_create_callback);
 362         }
 363
 364 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 365         struct CRYPTO_dynlock_value *l, const char *file,int line)
 366         {
 367         return(dynlock_lock_callback);
 368         }
 369
 370 void (*CRYPTO_get_dynlock_destroy_callback(void))
 371         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 372         {
 373         return(dynlock_destroy_callback);
 374         }
 375
 376 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 377         (const char *file, int line))
 378         {
 379         dynlock_create_callback=func;
 380         }
 381
 382 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 383         struct CRYPTO_dynlock_value *l, const char *file, int line))
 384         {
 385         dynlock_lock_callback=func;
 386         }
 387
 388 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 389         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 390         {
 391         dynlock_destroy_callback=func;
 392         }
 393
 394
 395 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 396                 int line)
 397         {
 398         return(locking_callback);
 399         }
 400
 401 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 402                                           const char *file,int line)
 403         {
 404         return(add_lock_callback);
 405         }
 406
 407 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 408                                               const char *file,int line))
 409         {
 410         locking_callback=func;
 411         }
 412
 413 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 414                                               const char *file,int line))
 415         {
 416         add_lock_callback=func;
 417         }
 418
 419 unsigned long (*CRYPTO_get_id_callback(void))(void)
 420         {
 421         return(id_callback);
 422         }
 423
 424 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 425         {
 426         id_callback=func;
 427         }
 428
 429 unsigned long CRYPTO_thread_id(void)
 430         {
 431         unsigned long ret=0;
 432
 433         if (id_callback == NULL)
 434                 {
 435 #ifdef OPENSSL_SYS_WIN16
 436                 ret=(unsigned long)GetCurrentTask();
 437 #elif defined(OPENSSL_SYS_WIN32)
 438                 ret=(unsigned long)GetCurrentThreadId();
 439 #elif defined(GETPID_IS_MEANINGLESS)
 440                 ret=1L;
 441 #else
 442                 ret=(unsigned long)getpid();
 443 #endif
 444                 }
 445         else
 446                 ret=id_callback();
 447         return(ret);
 448         }
 449
 450 void CRYPTO_lock(int mode, int type, const char *file, int line)
 451         {
 452 #ifdef LOCK_DEBUG
 453                 {
 454                 char *rw_text,*operation_text;
 455
 456                 if (mode & CRYPTO_LOCK)
 457                         operation_text="lock  ";
 458                 else if (mode & CRYPTO_UNLOCK)
 459                         operation_text="unlock";
 460                 else
 461                         operation_text="ERROR ";
 462
 463                 if (mode & CRYPTO_READ)
 464                         rw_text="r";
 465                 else if (mode & CRYPTO_WRITE)
 466                         rw_text="w";
 467                 else
 468                         rw_text="ERROR";
 469
 470                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 471                         CRYPTO_thread_id(), rw_text, operation_text,
 472                         CRYPTO_get_lock_name(type), file, line);
 473                 }
 474 #endif
 475         if (type < 0)
 476                 {
 477                 if (dynlock_lock_callback != NULL)
 478                         {
 479                         struct CRYPTO_dynlock_value *pointer
 480                                 = CRYPTO_get_dynlock_value(type);
 481
 482                         OPENSSL_assert(pointer != NULL);
 483
 484                         dynlock_lock_callback(mode, pointer, file, line);
 485
 486                         CRYPTO_destroy_dynlockid(type);
 487                         }
 488                 }
 489         else
 490                 if (locking_callback != NULL)
 491                         locking_callback(mode,type,file,line);
 492         }
 493
 494 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 495              int line)
 496         {
 497         int ret = 0;
 498
 499         if (add_lock_callback != NULL)
 500                 {
 501 #ifdef LOCK_DEBUG
 502                 int before= *pointer;
 503 #endif
 504
 505                 ret=add_lock_callback(pointer,amount,type,file,line);
 506 #ifdef LOCK_DEBUG
 507                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 508                         CRYPTO_thread_id(),
 509                         before,amount,ret,
 510                         CRYPTO_get_lock_name(type),
 511                         file,line);
 512 #endif
 513                 }
 514         else
 515                 {
 516                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 517
 518                 ret= *pointer+amount;
 519 #ifdef LOCK_DEBUG
 520                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 521                         CRYPTO_thread_id(),
 522                         *pointer,amount,ret,
 523                         CRYPTO_get_lock_name(type),
 524                         file,line);
 525 #endif
 526                 *pointer=ret;
 527                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 528                 }
 529         return(ret);
 530         }
 531
 532 const char *CRYPTO_get_lock_name(int type)
 533         {
 534         if (type < 0)
 535                 return("dynamic");
 536         else if (type < CRYPTO_NUM_LOCKS)
 537                 return(lock_names[type]);
 538         else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
 539                 return("ERROR");
 540         else
 541                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 542         }
 543
 544 #ifdef _DLL
 545 #ifdef OPENSSL_SYS_WIN32
 546
 547 /* All we really need to do is remove the 'error' state when a thread
 548  * detaches */
 549
 550 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 551              LPVOID lpvReserved)
 552         {
 553         switch(fdwReason)
 554                 {
 555         case DLL_PROCESS_ATTACH:
 556                 break;
 557         case DLL_THREAD_ATTACH:
 558                 break;
 559         case DLL_THREAD_DETACH:
 560                 ERR_remove_state(0);
 561                 break;
 562         case DLL_PROCESS_DETACH:
 563                 break;
 564                 }
 565         return(TRUE);
 566         }
 567 #endif
 568
 569 #endif
 570
 571 void OpenSSLDie(const char *file,int line,const char *assertion)
 572         {
 573         fprintf(stderr,
 574                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
 575                 file,line,assertion);
 576         abort();
 577         }