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 #if CRYPTO_NUM_LOCKS != 37
 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 *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)=NULL;
 187 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 188         int type,const char *file,int line)=NULL;
 189 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 190 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 191         (const char *file,int line)=NULL;
 192 static void (MS_FAR *dynlock_lock_callback)(int mode,
 193         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 194 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 195         const char *file,int line)=NULL;
 196
 197 int CRYPTO_get_new_lockid(char *name)
 198         {
 199         char *str;
 200         int i;
 201
 202 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 203         /* A hack to make Visual C++ 5.0 work correctly when linking as
 204          * a DLL using /MT. Without this, the application cannot use
 205          * and floating point printf's.
 206          * It also seems to be needed for Visual C 1.5 (win16) */
 207         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 208 #endif
 209
 210         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 211                 {
 212                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 213                 return(0);
 214                 }
 215         if ((str=BUF_strdup(name)) == NULL)
 216                 {
 217                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 218                 return(0);
 219                 }
 220         i=sk_push(app_locks,str);
 221         if (!i)
 222                 OPENSSL_free(str);
 223         else
 224                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 225         return(i);
 226         }
 227
 228 int CRYPTO_num_locks(void)
 229         {
 230         return CRYPTO_NUM_LOCKS;
 231         }
 232
 233 int CRYPTO_get_new_dynlockid(void)
 234         {
 235         int i = 0;
 236         CRYPTO_dynlock *pointer = NULL;
 237
 238         if (dynlock_create_callback == NULL)
 239                 {
 240                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 241                 return(0);
 242                 }
 243         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 244         if ((dyn_locks == NULL)
 245                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 246                 {
 247                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 248                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 249                 return(0);
 250                 }
 251         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 252
 253         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 254         if (pointer == NULL)
 255                 {
 256                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 257                 return(0);
 258                 }
 259         pointer->references = 1;
 260         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 261         if (pointer->data == NULL)
 262                 {
 263                 OPENSSL_free(pointer);
 264                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 265                 return(0);
 266                 }
 267
 268         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 269         /* First, try to find an existing empty slot */
 270         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 271         /* If there was none, push, thereby creating a new one */
 272         if (i == -1)
 273                 /* Since sk_push() returns the number of items on the
 274                    stack, not the location of the pushed item, we need
 275                    to transform the returned number into a position,
 276                    by decreasing it.  */
 277                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer) - 1;
 278         else
 279                 /* If we found a place with a NULL pointer, put our pointer
 280                    in it.  */
 281                 sk_CRYPTO_dynlock_set(dyn_locks,i,pointer);
 282         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 283
 284         if (i == -1)
 285                 {
 286                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 287                 OPENSSL_free(pointer);
 288                 }
 289         else
 290                 i += 1; /* to avoid 0 */
 291         return -i;
 292         }
 293
 294 void CRYPTO_destroy_dynlockid(int i)
 295         {
 296         CRYPTO_dynlock *pointer = NULL;
 297         if (i)
 298                 i = -i-1;
 299         if (dynlock_destroy_callback == NULL)
 300                 return;
 301
 302         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 303
 304         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 305                 {
 306                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 307                 return;
 308                 }
 309         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 310         if (pointer != NULL)
 311                 {
 312                 --pointer->references;
 313 #ifdef REF_CHECK
 314                 if (pointer->references < 0)
 315                         {
 316                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 317                         abort();
 318                         }
 319                 else
 320 #endif
 321                         if (pointer->references <= 0)
 322                                 {
 323                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 324                                 }
 325                         else
 326                                 pointer = NULL;
 327                 }
 328         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 329
 330         if (pointer)
 331                 {
 332                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 333                 OPENSSL_free(pointer);
 334                 }
 335         }
 336
 337 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 338         {
 339         CRYPTO_dynlock *pointer = NULL;
 340         if (i)
 341                 i = -i-1;
 342
 343         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 344
 345         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 346                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 347         if (pointer)
 348                 pointer->references++;
 349
 350         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 351
 352         if (pointer)
 353                 return pointer->data;
 354         return NULL;
 355         }
 356
 357 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 358         (const char *file,int line)
 359         {
 360         return(dynlock_create_callback);
 361         }
 362
 363 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 364         struct CRYPTO_dynlock_value *l, const char *file,int line)
 365         {
 366         return(dynlock_lock_callback);
 367         }
 368
 369 void (*CRYPTO_get_dynlock_destroy_callback(void))
 370         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 371         {
 372         return(dynlock_destroy_callback);
 373         }
 374
 375 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 376         (const char *file, int line))
 377         {
 378         dynlock_create_callback=func;
 379         }
 380
 381 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 382         struct CRYPTO_dynlock_value *l, const char *file, int line))
 383         {
 384         dynlock_lock_callback=func;
 385         }
 386
 387 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 388         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 389         {
 390         dynlock_destroy_callback=func;
 391         }
 392
 393
 394 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 395                 int line)
 396         {
 397         return(locking_callback);
 398         }
 399
 400 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 401                                           const char *file,int line)
 402         {
 403         return(add_lock_callback);
 404         }
 405
 406 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 407                                               const char *file,int line))
 408         {
 409         locking_callback=func;
 410         }
 411
 412 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 413                                               const char *file,int line))
 414         {
 415         add_lock_callback=func;
 416         }
 417
 418 unsigned long (*CRYPTO_get_id_callback(void))(void)
 419         {
 420         return(id_callback);
 421         }
 422
 423 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 424         {
 425         id_callback=func;
 426         }
 427
 428 unsigned long CRYPTO_thread_id(void)
 429         {
 430         unsigned long ret=0;
 431
 432         if (id_callback == NULL)
 433                 {
 434 #ifdef OPENSSL_SYS_WIN16
 435                 ret=(unsigned long)GetCurrentTask();
 436 #elif defined(OPENSSL_SYS_WIN32)
 437                 ret=(unsigned long)GetCurrentThreadId();
 438 #elif defined(GETPID_IS_MEANINGLESS)
 439                 ret=1L;
 440 #else
 441                 ret=(unsigned long)getpid();
 442 #endif
 443                 }
 444         else
 445                 ret=id_callback();
 446         return(ret);
 447         }
 448
 449 void CRYPTO_lock(int mode, int type, const char *file, int line)
 450         {
 451 #ifdef LOCK_DEBUG
 452                 {
 453                 char *rw_text,*operation_text;
 454
 455                 if (mode & CRYPTO_LOCK)
 456                         operation_text="lock  ";
 457                 else if (mode & CRYPTO_UNLOCK)
 458                         operation_text="unlock";
 459                 else
 460                         operation_text="ERROR ";
 461
 462                 if (mode & CRYPTO_READ)
 463                         rw_text="r";
 464                 else if (mode & CRYPTO_WRITE)
 465                         rw_text="w";
 466                 else
 467                         rw_text="ERROR";
 468
 469                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 470                         CRYPTO_thread_id(), rw_text, operation_text,
 471                         CRYPTO_get_lock_name(type), file, line);
 472                 }
 473 #endif
 474         if (type < 0)
 475                 {
 476                 if (dynlock_lock_callback != NULL)
 477                         {
 478                         struct CRYPTO_dynlock_value *pointer
 479                                 = CRYPTO_get_dynlock_value(type);
 480
 481                         OPENSSL_assert(pointer != NULL);
 482
 483                         dynlock_lock_callback(mode, pointer, file, line);
 484
 485                         CRYPTO_destroy_dynlockid(type);
 486                         }
 487                 }
 488         else
 489                 if (locking_callback != NULL)
 490                         locking_callback(mode,type,file,line);
 491         }
 492
 493 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 494              int line)
 495         {
 496         int ret = 0;
 497
 498         if (add_lock_callback != NULL)
 499                 {
 500 #ifdef LOCK_DEBUG
 501                 int before= *pointer;
 502 #endif
 503
 504                 ret=add_lock_callback(pointer,amount,type,file,line);
 505 #ifdef LOCK_DEBUG
 506                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 507                         CRYPTO_thread_id(),
 508                         before,amount,ret,
 509                         CRYPTO_get_lock_name(type),
 510                         file,line);
 511 #endif
 512                 }
 513         else
 514                 {
 515                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 516
 517                 ret= *pointer+amount;
 518 #ifdef LOCK_DEBUG
 519                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 520                         CRYPTO_thread_id(),
 521                         *pointer,amount,ret,
 522                         CRYPTO_get_lock_name(type),
 523                         file,line);
 524 #endif
 525                 *pointer=ret;
 526                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 527                 }
 528         return(ret);
 529         }
 530
 531 const char *CRYPTO_get_lock_name(int type)
 532         {
 533         if (type < 0)
 534                 return("dynamic");
 535         else if (type < CRYPTO_NUM_LOCKS)
 536                 return(lock_names[type]);
 537         else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
 538                 return("ERROR");
 539         else
 540                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 541         }
 542
 543 #ifdef _DLL
 544 #ifdef OPENSSL_SYS_WIN32
 545
 546 /* All we really need to do is remove the 'error' state when a thread
 547  * detaches */
 548
 549 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 550              LPVOID lpvReserved)
 551         {
 552         switch(fdwReason)
 553                 {
 554         case DLL_PROCESS_ATTACH:
 555                 break;
 556         case DLL_THREAD_ATTACH:
 557                 break;
 558         case DLL_THREAD_DETACH:
 559                 ERR_remove_state(0);
 560                 break;
 561         case DLL_PROCESS_DETACH:
 562                 break;
 563                 }
 564         return(TRUE);
 565         }
 566 #endif
 567
 568 #endif
 569
 570 void OpenSSLDie(const char *file,int line,const char *assertion)
 571         {
 572         fprintf(stderr,
 573                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
 574                 file,line,assertion);
 575         abort();
 576         }