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  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
  60  * ECDH support in OpenSSL originally developed by
  61  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
  62  */
  63
  64 #include <stdio.h>
  65 #include <string.h>
  66 #include "cryptlib.h"
  67 #include <openssl/crypto.h>
  68 #include <openssl/safestack.h>
  69
  70 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
  71 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
  72 #endif
  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         "ecdsa",
 113         "ec",
 114         "ecdh",
 115 #if CRYPTO_NUM_LOCKS != 35
 116 # error "Inconsistency between crypto.h and cryptlib.c"
 117 #endif
 118         };
 119
 120 /* This is for applications to allocate new type names in the non-dynamic
 121    array of lock names.  These are numbered with positive numbers.  */
 122 static STACK *app_locks=NULL;
 123
 124 /* For applications that want a more dynamic way of handling threads, the
 125    following stack is used.  These are externally numbered with negative
 126    numbers.  */
 127 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 128
 129
 130 static void (MS_FAR *locking_callback)(int mode,int type,
 131         const char *file,int line)=NULL;
 132 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 133         int type,const char *file,int line)=NULL;
 134 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 135 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 136         (const char *file,int line)=NULL;
 137 static void (MS_FAR *dynlock_lock_callback)(int mode,
 138         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 139 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 140         const char *file,int line)=NULL;
 141
 142 int CRYPTO_get_new_lockid(char *name)
 143         {
 144         char *str;
 145         int i;
 146
 147 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 148         /* A hack to make Visual C++ 5.0 work correctly when linking as
 149          * a DLL using /MT. Without this, the application cannot use
 150          * and floating point printf's.
 151          * It also seems to be needed for Visual C 1.5 (win16) */
 152         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 153 #endif
 154
 155         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 156                 {
 157                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 158                 return(0);
 159                 }
 160         if ((str=BUF_strdup(name)) == NULL)
 161                 {
 162                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 163                 return(0);
 164                 }
 165         i=sk_push(app_locks,str);
 166         if (!i)
 167                 OPENSSL_free(str);
 168         else
 169                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 170         return(i);
 171         }
 172
 173 int CRYPTO_num_locks(void)
 174         {
 175         return CRYPTO_NUM_LOCKS;
 176         }
 177
 178 int CRYPTO_get_new_dynlockid(void)
 179         {
 180         int i = 0;
 181         CRYPTO_dynlock *pointer = NULL;
 182
 183         if (dynlock_create_callback == NULL)
 184                 {
 185                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 186                 return(0);
 187                 }
 188         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 189         if ((dyn_locks == NULL)
 190                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 191                 {
 192                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 193                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 194                 return(0);
 195                 }
 196         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 197
 198         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 199         if (pointer == NULL)
 200                 {
 201                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 202                 return(0);
 203                 }
 204         pointer->references = 1;
 205         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 206         if (pointer->data == NULL)
 207                 {
 208                 OPENSSL_free(pointer);
 209                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 210                 return(0);
 211                 }
 212
 213         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 214         /* First, try to find an existing empty slot */
 215         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 216         /* If there was none, push, thereby creating a new one */
 217         if (i == -1)
 218                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
 219         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 220
 221         if (!i)
 222                 {
 223                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 224                 OPENSSL_free(pointer);
 225                 }
 226         else
 227                 i += 1; /* to avoid 0 */
 228         return -i;
 229         }
 230
 231 void CRYPTO_destroy_dynlockid(int i)
 232         {
 233         CRYPTO_dynlock *pointer = NULL;
 234         if (i)
 235                 i = -i-1;
 236         if (dynlock_destroy_callback == NULL)
 237                 return;
 238
 239         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 240
 241         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 242                 {
 243                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 244                 return;
 245                 }
 246         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 247         if (pointer != NULL)
 248                 {
 249                 --pointer->references;
 250 #ifdef REF_CHECK
 251                 if (pointer->references < 0)
 252                         {
 253                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 254                         abort();
 255                         }
 256                 else
 257 #endif
 258                         if (pointer->references <= 0)
 259                                 {
 260                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 261                                 }
 262                         else
 263                                 pointer = NULL;
 264                 }
 265         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 266
 267         if (pointer)
 268                 {
 269                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 270                 OPENSSL_free(pointer);
 271                 }
 272         }
 273
 274 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 275         {
 276         CRYPTO_dynlock *pointer = NULL;
 277         if (i)
 278                 i = -i-1;
 279
 280         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 281
 282         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 283                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 284         if (pointer)
 285                 pointer->references++;
 286
 287         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 288
 289         if (pointer)
 290                 return pointer->data;
 291         return NULL;
 292         }
 293
 294 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 295         (const char *file,int line)
 296         {
 297         return(dynlock_create_callback);
 298         }
 299
 300 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 301         struct CRYPTO_dynlock_value *l, const char *file,int line)
 302         {
 303         return(dynlock_lock_callback);
 304         }
 305
 306 void (*CRYPTO_get_dynlock_destroy_callback(void))
 307         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 308         {
 309         return(dynlock_destroy_callback);
 310         }
 311
 312 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 313         (const char *file, int line))
 314         {
 315         dynlock_create_callback=func;
 316         }
 317
 318 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 319         struct CRYPTO_dynlock_value *l, const char *file, int line))
 320         {
 321         dynlock_lock_callback=func;
 322         }
 323
 324 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 325         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 326         {
 327         dynlock_destroy_callback=func;
 328         }
 329
 330
 331 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 332                 int line)
 333         {
 334         return(locking_callback);
 335         }
 336
 337 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 338                                           const char *file,int line)
 339         {
 340         return(add_lock_callback);
 341         }
 342
 343 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 344                                               const char *file,int line))
 345         {
 346         locking_callback=func;
 347         }
 348
 349 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 350                                               const char *file,int line))
 351         {
 352         add_lock_callback=func;
 353         }
 354
 355 unsigned long (*CRYPTO_get_id_callback(void))(void)
 356         {
 357         return(id_callback);
 358         }
 359
 360 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 361         {
 362         id_callback=func;
 363         }
 364
 365 unsigned long CRYPTO_thread_id(void)
 366         {
 367         unsigned long ret=0;
 368
 369         if (id_callback == NULL)
 370                 {
 371 #ifdef OPENSSL_SYS_WIN16
 372                 ret=(unsigned long)GetCurrentTask();
 373 #elif defined(OPENSSL_SYS_WIN32)
 374                 ret=(unsigned long)GetCurrentThreadId();
 375 #elif defined(GETPID_IS_MEANINGLESS)
 376                 ret=1L;
 377 #else
 378                 ret=(unsigned long)getpid();
 379 #endif
 380                 }
 381         else
 382                 ret=id_callback();
 383         return(ret);
 384         }
 385
 386 void CRYPTO_lock(int mode, int type, const char *file, int line)
 387         {
 388 #ifdef LOCK_DEBUG
 389                 {
 390                 char *rw_text,*operation_text;
 391
 392                 if (mode & CRYPTO_LOCK)
 393                         operation_text="lock  ";
 394                 else if (mode & CRYPTO_UNLOCK)
 395                         operation_text="unlock";
 396                 else
 397                         operation_text="ERROR ";
 398
 399                 if (mode & CRYPTO_READ)
 400                         rw_text="r";
 401                 else if (mode & CRYPTO_WRITE)
 402                         rw_text="w";
 403                 else
 404                         rw_text="ERROR";
 405
 406                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 407                         CRYPTO_thread_id(), rw_text, operation_text,
 408                         CRYPTO_get_lock_name(type), file, line);
 409                 }
 410 #endif
 411         if (type < 0)
 412                 {
 413                 struct CRYPTO_dynlock_value *pointer
 414                         = CRYPTO_get_dynlock_value(type);
 415
 416                 if (pointer && dynlock_lock_callback)
 417                         {
 418                         dynlock_lock_callback(mode, pointer, file, line);
 419                         }
 420
 421                 CRYPTO_destroy_dynlockid(type);
 422                 }
 423         else
 424                 if (locking_callback != NULL)
 425                         locking_callback(mode,type,file,line);
 426         }
 427
 428 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 429              int line)
 430         {
 431         int ret = 0;
 432
 433         if (add_lock_callback != NULL)
 434                 {
 435 #ifdef LOCK_DEBUG
 436                 int before= *pointer;
 437 #endif
 438
 439                 ret=add_lock_callback(pointer,amount,type,file,line);
 440 #ifdef LOCK_DEBUG
 441                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 442                         CRYPTO_thread_id(),
 443                         before,amount,ret,
 444                         CRYPTO_get_lock_name(type),
 445                         file,line);
 446 #endif
 447                 }
 448         else
 449                 {
 450                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 451
 452                 ret= *pointer+amount;
 453 #ifdef LOCK_DEBUG
 454                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 455                         CRYPTO_thread_id(),
 456                         *pointer,amount,ret,
 457                         CRYPTO_get_lock_name(type),
 458                         file,line);
 459 #endif
 460                 *pointer=ret;
 461                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 462                 }
 463         return(ret);
 464         }
 465
 466 const char *CRYPTO_get_lock_name(int type)
 467         {
 468         if (type < 0)
 469                 return("dynamic");
 470         else if (type < CRYPTO_NUM_LOCKS)
 471                 return(lock_names[type]);
 472         else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
 473                 return("ERROR");
 474         else
 475                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 476         }
 477
 478 #ifdef _DLL
 479 #ifdef OPENSSL_SYS_WIN32
 480
 481 /* All we really need to do is remove the 'error' state when a thread
 482  * detaches */
 483
 484 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 485              LPVOID lpvReserved)
 486         {
 487         switch(fdwReason)
 488                 {
 489         case DLL_PROCESS_ATTACH:
 490                 break;
 491         case DLL_THREAD_ATTACH:
 492                 break;
 493         case DLL_THREAD_DETACH:
 494                 ERR_remove_state(0);
 495                 break;
 496         case DLL_PROCESS_DETACH:
 497                 break;
 498                 }
 499         return(TRUE);
 500         }
 501 #endif
 502
 503 #endif