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         "rand",
  98         "rand2",
  99         "debug_malloc",
 100         "BIO",
 101         "gethostbyname",
 102         "getservbyname",
 103         "readdir",
 104         "RSA_blinding",
 105         "dh",
 106         "debug_malloc2",
 107         "dso",
 108         "dynlock",
 109         "engine",
 110         "ui",
 111         "ecdsa",
 112         "ec",
 113         "ecdh",
 114 #if CRYPTO_NUM_LOCKS != 34
 115 # error "Inconsistency between crypto.h and cryptlib.c"
 116 #endif
 117         };
 118
 119 /* This is for applications to allocate new type names in the non-dynamic
 120    array of lock names.  These are numbered with positive numbers.  */
 121 static STACK *app_locks=NULL;
 122
 123 /* For applications that want a more dynamic way of handling threads, the
 124    following stack is used.  These are externally numbered with negative
 125    numbers.  */
 126 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 127
 128
 129 static void (MS_FAR *locking_callback)(int mode,int type,
 130         const char *file,int line)=NULL;
 131 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 132         int type,const char *file,int line)=NULL;
 133 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 134 static struct CRYPTO_dynlock_value *(MS_FAR *dynlock_create_callback)
 135         (const char *file,int line)=NULL;
 136 static void (MS_FAR *dynlock_lock_callback)(int mode,
 137         struct CRYPTO_dynlock_value *l, const char *file,int line)=NULL;
 138 static void (MS_FAR *dynlock_destroy_callback)(struct CRYPTO_dynlock_value *l,
 139         const char *file,int line)=NULL;
 140
 141 int CRYPTO_get_new_lockid(char *name)
 142         {
 143         char *str;
 144         int i;
 145
 146 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
 147         /* A hack to make Visual C++ 5.0 work correctly when linking as
 148          * a DLL using /MT. Without this, the application cannot use
 149          * and floating point printf's.
 150          * It also seems to be needed for Visual C 1.5 (win16) */
 151         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 152 #endif
 153
 154         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 155                 {
 156                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 157                 return(0);
 158                 }
 159         if ((str=BUF_strdup(name)) == NULL)
 160                 {
 161                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 162                 return(0);
 163                 }
 164         i=sk_push(app_locks,str);
 165         if (!i)
 166                 OPENSSL_free(str);
 167         else
 168                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 169         return(i);
 170         }
 171
 172 int CRYPTO_num_locks(void)
 173         {
 174         return CRYPTO_NUM_LOCKS;
 175         }
 176
 177 int CRYPTO_get_new_dynlockid(void)
 178         {
 179         int i = 0;
 180         CRYPTO_dynlock *pointer = NULL;
 181
 182         if (dynlock_create_callback == NULL)
 183                 {
 184                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 185                 return(0);
 186                 }
 187         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 188         if ((dyn_locks == NULL)
 189                 && ((dyn_locks=sk_CRYPTO_dynlock_new_null()) == NULL))
 190                 {
 191                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 192                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 193                 return(0);
 194                 }
 195         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 196
 197         pointer = (CRYPTO_dynlock *)OPENSSL_malloc(sizeof(CRYPTO_dynlock));
 198         if (pointer == NULL)
 199                 {
 200                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 201                 return(0);
 202                 }
 203         pointer->references = 1;
 204         pointer->data = dynlock_create_callback(__FILE__,__LINE__);
 205         if (pointer->data == NULL)
 206                 {
 207                 OPENSSL_free(pointer);
 208                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 209                 return(0);
 210                 }
 211
 212         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 213         /* First, try to find an existing empty slot */
 214         i=sk_CRYPTO_dynlock_find(dyn_locks,NULL);
 215         /* If there was none, push, thereby creating a new one */
 216         if (i == -1)
 217                 i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
 218         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 219
 220         if (!i)
 221                 {
 222                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 223                 OPENSSL_free(pointer);
 224                 }
 225         else
 226                 i += 1; /* to avoid 0 */
 227         return -i;
 228         }
 229
 230 void CRYPTO_destroy_dynlockid(int i)
 231         {
 232         CRYPTO_dynlock *pointer = NULL;
 233         if (i)
 234                 i = -i-1;
 235         if (dynlock_destroy_callback == NULL)
 236                 return;
 237
 238         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 239
 240         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 241                 {
 242                 CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 243                 return;
 244                 }
 245         pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 246         if (pointer != NULL)
 247                 {
 248                 --pointer->references;
 249 #ifdef REF_CHECK
 250                 if (pointer->references < 0)
 251                         {
 252                         fprintf(stderr,"CRYPTO_destroy_dynlockid, bad reference count\n");
 253                         abort();
 254                         }
 255                 else
 256 #endif
 257                         if (pointer->references <= 0)
 258                                 {
 259                                 sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 260                                 }
 261                         else
 262                                 pointer = NULL;
 263                 }
 264         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 265
 266         if (pointer)
 267                 {
 268                 dynlock_destroy_callback(pointer->data,__FILE__,__LINE__);
 269                 OPENSSL_free(pointer);
 270                 }
 271         }
 272
 273 struct CRYPTO_dynlock_value *CRYPTO_get_dynlock_value(int i)
 274         {
 275         CRYPTO_dynlock *pointer = NULL;
 276         if (i)
 277                 i = -i-1;
 278
 279         CRYPTO_w_lock(CRYPTO_LOCK_DYNLOCK);
 280
 281         if (dyn_locks != NULL && i < sk_CRYPTO_dynlock_num(dyn_locks))
 282                 pointer = sk_CRYPTO_dynlock_value(dyn_locks, i);
 283         if (pointer)
 284                 pointer->references++;
 285
 286         CRYPTO_w_unlock(CRYPTO_LOCK_DYNLOCK);
 287
 288         if (pointer)
 289                 return pointer->data;
 290         return NULL;
 291         }
 292
 293 struct CRYPTO_dynlock_value *(*CRYPTO_get_dynlock_create_callback(void))
 294         (const char *file,int line)
 295         {
 296         return(dynlock_create_callback);
 297         }
 298
 299 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,
 300         struct CRYPTO_dynlock_value *l, const char *file,int line)
 301         {
 302         return(dynlock_lock_callback);
 303         }
 304
 305 void (*CRYPTO_get_dynlock_destroy_callback(void))
 306         (struct CRYPTO_dynlock_value *l, const char *file,int line)
 307         {
 308         return(dynlock_destroy_callback);
 309         }
 310
 311 void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(*func)
 312         (const char *file, int line))
 313         {
 314         dynlock_create_callback=func;
 315         }
 316
 317 void CRYPTO_set_dynlock_lock_callback(void (*func)(int mode,
 318         struct CRYPTO_dynlock_value *l, const char *file, int line))
 319         {
 320         dynlock_lock_callback=func;
 321         }
 322
 323 void CRYPTO_set_dynlock_destroy_callback(void (*func)
 324         (struct CRYPTO_dynlock_value *l, const char *file, int line))
 325         {
 326         dynlock_destroy_callback=func;
 327         }
 328
 329
 330 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 331                 int line)
 332         {
 333         return(locking_callback);
 334         }
 335
 336 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 337                                           const char *file,int line)
 338         {
 339         return(add_lock_callback);
 340         }
 341
 342 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 343                                               const char *file,int line))
 344         {
 345         locking_callback=func;
 346         }
 347
 348 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 349                                               const char *file,int line))
 350         {
 351         add_lock_callback=func;
 352         }
 353
 354 unsigned long (*CRYPTO_get_id_callback(void))(void)
 355         {
 356         return(id_callback);
 357         }
 358
 359 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 360         {
 361         id_callback=func;
 362         }
 363
 364 unsigned long CRYPTO_thread_id(void)
 365         {
 366         unsigned long ret=0;
 367
 368         if (id_callback == NULL)
 369                 {
 370 #ifdef OPENSSL_SYS_WIN16
 371                 ret=(unsigned long)GetCurrentTask();
 372 #elif defined(OPENSSL_SYS_WIN32)
 373                 ret=(unsigned long)GetCurrentThreadId();
 374 #elif defined(GETPID_IS_MEANINGLESS)
 375                 ret=1L;
 376 #else
 377                 ret=(unsigned long)getpid();
 378 #endif
 379                 }
 380         else
 381                 ret=id_callback();
 382         return(ret);
 383         }
 384
 385 void CRYPTO_lock(int mode, int type, const char *file, int line)
 386         {
 387 #ifdef LOCK_DEBUG
 388                 {
 389                 char *rw_text,*operation_text;
 390
 391                 if (mode & CRYPTO_LOCK)
 392                         operation_text="lock  ";
 393                 else if (mode & CRYPTO_UNLOCK)
 394                         operation_text="unlock";
 395                 else
 396                         operation_text="ERROR ";
 397
 398                 if (mode & CRYPTO_READ)
 399                         rw_text="r";
 400                 else if (mode & CRYPTO_WRITE)
 401                         rw_text="w";
 402                 else
 403                         rw_text="ERROR";
 404
 405                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 406                         CRYPTO_thread_id(), rw_text, operation_text,
 407                         CRYPTO_get_lock_name(type), file, line);
 408                 }
 409 #endif
 410         if (type < 0)
 411                 {
 412                 struct CRYPTO_dynlock_value *pointer
 413                         = CRYPTO_get_dynlock_value(type);
 414
 415                 if (pointer && dynlock_lock_callback)
 416                         {
 417                         dynlock_lock_callback(mode, pointer, file, line);
 418                         }
 419
 420                 CRYPTO_destroy_dynlockid(type);
 421                 }
 422         else
 423                 if (locking_callback != NULL)
 424                         locking_callback(mode,type,file,line);
 425         }
 426
 427 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 428              int line)
 429         {
 430         int ret = 0;
 431
 432         if (add_lock_callback != NULL)
 433                 {
 434 #ifdef LOCK_DEBUG
 435                 int before= *pointer;
 436 #endif
 437
 438                 ret=add_lock_callback(pointer,amount,type,file,line);
 439 #ifdef LOCK_DEBUG
 440                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 441                         CRYPTO_thread_id(),
 442                         before,amount,ret,
 443                         CRYPTO_get_lock_name(type),
 444                         file,line);
 445 #endif
 446                 }
 447         else
 448                 {
 449                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 450
 451                 ret= *pointer+amount;
 452 #ifdef LOCK_DEBUG
 453                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 454                         CRYPTO_thread_id(),
 455                         *pointer,amount,ret,
 456                         CRYPTO_get_lock_name(type),
 457                         file,line);
 458 #endif
 459                 *pointer=ret;
 460                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 461                 }
 462         return(ret);
 463         }
 464
 465 const char *CRYPTO_get_lock_name(int type)
 466         {
 467         if (type < 0)
 468                 return("dynamic");
 469         else if (type < CRYPTO_NUM_LOCKS)
 470                 return(lock_names[type]);
 471         else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
 472                 return("ERROR");
 473         else
 474                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 475         }
 476
 477 #ifdef _DLL
 478 #ifdef OPENSSL_SYS_WIN32
 479
 480 /* All we really need to do is remove the 'error' state when a thread
 481  * detaches */
 482
 483 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 484              LPVOID lpvReserved)
 485         {
 486         switch(fdwReason)
 487                 {
 488         case DLL_PROCESS_ATTACH:
 489                 break;
 490         case DLL_THREAD_ATTACH:
 491                 break;
 492         case DLL_THREAD_DETACH:
 493                 ERR_remove_state(0);
 494                 break;
 495         case DLL_PROCESS_DETACH:
 496                 break;
 497                 }
 498         return(TRUE);
 499         }
 500 #endif
 501
 502 #endif