crypto/cryptlib.c

   1 /* crypto/cryptlib.c */
   2 /* ====================================================================
   3  * Copyright (c) 1998-2002 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 #if CRYPTO_NUM_LOCKS != 36
 170 # error "Inconsistency between crypto.h and cryptlib.c"
 171 #endif
 172         };
 173
 174 /* This is for applications to allocate new type names in the non-dynamic
 175    array of lock names.  These are numbered with positive numbers.  */
 176 static STACK *app_locks=NULL;
 177
 178 /* For applications that want a more dynamic way of handling threads, the
 179    following stack is used.  These are externally numbered with negative
 180    numbers.  */
 181 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 182
 183
 184 static void (MS_FAR *locking_callback)(int mode,int type,
 185         const char *file,int line)=NULL;
 186 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 187         int type,const char *file,int line)=NULL;
 188 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 189 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 190         (const char *file,int line)=NULL;
 191 static void (MS_FAR *dynlock_lock_callback)(int mode,
 192         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 193 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 194         const char *file,int line)=NULL;
 195
 196 int CRYPTO_get_new_lockid(char *name)
 197         {
 198         char *str;
 199         int i;
 200
 201 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 202         /* A hack to make Visual C++ 5.0 work correctly when linking as
 203          * a DLL using /MT. Without this, the application cannot use
 204          * and floating point printf's.
 205          * It also seems to be needed for Visual C 1.5 (win16) */
 206         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 207 #endif
 208
 209         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 210                 {
 211                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 212                 return(0);
 213                 }
 214         if ((str=BUF_strdup(name)) == NULL)
 215                 {
 216                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 217                 return(0);
 218                 }
 219         i=sk_push(app_locks,str);
 220         if (!i)
 221                 OPENSSL_free(str);
 222         else
 223                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 224         return(i);
 225         }
 226
 227 int CRYPTO_num_locks(void)
 228         {
 229         return CRYPTO_NUM_LOCKS;
 230         }
 231
 232 int CRYPTO_get_new_dynlockid(void)
 233         {
 234         int i = 0;
 235         CRYPTO_dynlock *pointer = NULL;
 236
 237         if (dynlock_create_callback == NULL)
 238                 {
 239                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 240                 return(0);
 241                 }
 242         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 243         if ((dyn_locks == NULL)
 244                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 245                 {
 246                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 247                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 248                 return(0);
 249                 }
 250         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 251
 252         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 253         if (pointer == NULL)
 254                 {
 255                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 256                 return(0);
 257                 }
 258         pointer->references = 1;
 259         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 260         if (pointer->data == NULL)
 261                 {
 262                 OPENSSL_free(pointer);
 263                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 264                 return(0);
 265                 }
 266
 267         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 268         /* First, try to find an existing empty slot */
 269         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 270         /* If there was none, push, thereby creating a new one */
 271         if (i == -1)
 272                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
 273         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 274
 275         if (!i)
 276                 {
 277                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 278                 OPENSSL_free(pointer);
 279                 }
 280         else
 281                 i += 1; /* to avoid 0 */
 282         return -i;
 283         }
 284
 285 void CRYPTO_destroy_dynlockid(int i)
 286         {
 287         CRYPTO_dynlock *pointer = NULL;
 288         if (i)
 289                 i = -i-1;
 290         if (dynlock_destroy_callback == NULL)
 291                 return;
 292
 293         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 294
 295         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 296                 {
 297                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 298                 return;
 299                 }
 300         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 301         if (pointer != NULL)
 302                 {
 303                 --pointer->references;
 304 #ifdef REF_CHECK
 305                 if (pointer->references < 0)
 306                         {
 307                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 308                         abort();
 309                         }
 310                 else
 311 #endif
 312                         if (pointer->references <= 0)
 313                                 {
 314                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 315                                 }
 316                         else
 317                                 pointer = NULL;
 318                 }
 319         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 320
 321         if (pointer)
 322                 {
 323                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 324                 OPENSSL_free(pointer);
 325                 }
 326         }
 327
 328 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 329         {
 330         CRYPTO_dynlock *pointer = NULL;
 331         if (i)
 332                 i = -i-1;
 333
 334         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 335
 336         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 337                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 338         if (pointer)
 339                 pointer->references++;
 340
 341         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 342
 343         if (pointer)
 344                 return pointer->data;
 345         return NULL;
 346         }
 347
 348 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 349         (const char *file,int line)
 350         {
 351         return(dynlock_create_callback);
 352         }
 353
 354 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 355         struct CRYPTO_dynlock_value *l, const char *file,int line)
 356         {
 357         return(dynlock_lock_callback);
 358         }
 359
 360 void (*CRYPTO_get_dynlock_destroy_callback(void))
 361         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 362         {
 363         return(dynlock_destroy_callback);
 364         }
 365
 366 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 367         (const char *file, int line))
 368         {
 369         dynlock_create_callback=func;
 370         }
 371
 372 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 373         struct CRYPTO_dynlock_value *l, const char *file, int line))
 374         {
 375         dynlock_lock_callback=func;
 376         }
 377
 378 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 379         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 380         {
 381         dynlock_destroy_callback=func;
 382         }
 383
 384
 385 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 386                 int line)
 387         {
 388         return(locking_callback);
 389         }
 390
 391 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 392                                           const char *file,int line)
 393         {
 394         return(add_lock_callback);
 395         }
 396
 397 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 398                                               const char *file,int line))
 399         {
 400         locking_callback=func;
 401         }
 402
 403 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 404                                               const char *file,int line))
 405         {
 406         add_lock_callback=func;
 407         }
 408
 409 unsigned long (*CRYPTO_get_id_callback(void))(void)
 410         {
 411         return(id_callback);
 412         }
 413
 414 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 415         {
 416         id_callback=func;
 417         }
 418
 419 unsigned long CRYPTO_thread_id(void)
 420         {
 421         unsigned long ret=0;
 422
 423         if (id_callback == NULL)
 424                 {
 425 #ifdef OPENSSL_SYS_WIN16
 426                 ret=(unsigned long)GetCurrentTask();
 427 #elif defined(OPENSSL_SYS_WIN32)
 428                 ret=(unsigned long)GetCurrentThreadId();
 429 #elif defined(GETPID_IS_MEANINGLESS)
 430                 ret=1L;
 431 #else
 432                 ret=(unsigned long)getpid();
 433 #endif
 434                 }
 435         else
 436                 ret=id_callback();
 437         return(ret);
 438         }
 439
 440 void CRYPTO_lock(int mode, int type, const char *file, int line)
 441         {
 442 #ifdef LOCK_DEBUG
 443                 {
 444                 char *rw_text,*operation_text;
 445
 446                 if (mode & CRYPTO_LOCK)
 447                         operation_text="lock  ";
 448                 else if (mode & CRYPTO_UNLOCK)
 449                         operation_text="unlock";
 450                 else
 451                         operation_text="ERROR ";
 452
 453                 if (mode & CRYPTO_READ)
 454                         rw_text="r";
 455                 else if (mode & CRYPTO_WRITE)
 456                         rw_text="w";
 457                 else
 458                         rw_text="ERROR";
 459
 460                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 461                         CRYPTO_thread_id(), rw_text, operation_text,
 462                         CRYPTO_get_lock_name(type), file, line);
 463                 }
 464 #endif
 465         if (type < 0)
 466                 {
 467                 struct CRYPTO_dynlock_value *pointer
 468                         = CRYPTO_get_dynlock_value(type);
 469
 470                 if (pointer && dynlock_lock_callback)
 471                         {
 472                         dynlock_lock_callback(mode, pointer, file, line);
 473                         }
 474
 475                 CRYPTO_destroy_dynlockid(type);
 476                 }
 477         else
 478                 if (locking_callback != NULL)
 479                         locking_callback(mode,type,file,line);
 480         }
 481
 482 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 483              int line)
 484         {
 485         int ret = 0;
 486
 487         if (add_lock_callback != NULL)
 488                 {
 489 #ifdef LOCK_DEBUG
 490                 int before= *pointer;
 491 #endif
 492
 493                 ret=add_lock_callback(pointer,amount,type,file,line);
 494 #ifdef LOCK_DEBUG
 495                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 496                         CRYPTO_thread_id(),
 497                         before,amount,ret,
 498                         CRYPTO_get_lock_name(type),
 499                         file,line);
 500 #endif
 501                 }
 502         else
 503                 {
 504                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 505
 506                 ret= *pointer+amount;
 507 #ifdef LOCK_DEBUG
 508                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 509                         CRYPTO_thread_id(),
 510                         *pointer,amount,ret,
 511                         CRYPTO_get_lock_name(type),
 512                         file,line);
 513 #endif
 514                 *pointer=ret;
 515                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 516                 }
 517         return(ret);
 518         }
 519
 520 const char *CRYPTO_get_lock_name(int type)
 521         {
 522         if (type < 0)
 523                 return("dynamic");
 524         else if (type < CRYPTO_NUM_LOCKS)
 525                 return(lock_names[type]);
 526         else if (type-CRYPTO_NUM_LOCKS > sk_num(app_locks))
 527                 return("ERROR");
 528         else
 529                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 530         }
 531
 532 #ifdef _DLL
 533 #ifdef OPENSSL_SYS_WIN32
 534
 535 /* All we really need to do is remove the 'error' state when a thread
 536  * detaches */
 537
 538 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 539              LPVOID lpvReserved)
 540         {
 541         switch(fdwReason)
 542                 {
 543         case DLL_PROCESS_ATTACH:
 544                 break;
 545         case DLL_THREAD_ATTACH:
 546                 break;
 547         case DLL_THREAD_DETACH:
 548                 ERR_remove_state(0);
 549                 break;
 550         case DLL_PROCESS_DETACH:
 551                 break;
 552                 }
 553         return(TRUE);
 554         }
 555 #endif
 556
 557 #endif
 558
 559 void OpenSSLDie(const char *file,int line,const char *assertion)
 560         {
 561         fprintf(stderr,
 562                 "%s(%d): OpenSSL internal error, assertion failed: %s\n",
 563                 file,line,assertion);
 564         abort();
 565         }