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 #include <stdio.h>
  60 #include <string.h>
  61 #include "cryptlib.h"
  62 #include <openssl/crypto.h>
  63 #include <openssl/safestack.h>
  64
  65 #if defined(WIN32) || defined(WIN16)
  66 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
  67 #endif
  68
  69 DECLARE_STACK_OF(CRYPTO_dynlock);
  70 IMPLEMENT_STACK_OF(CRYPTO_dynlock);
  71
  72 /* real #defines in crypto.h, keep these upto date */
  73 static const char* lock_names[CRYPTO_NUM_LOCKS] =
  74         {
  75         "<<ERROR>>",
  76         "err",
  77         "err_hash",
  78         "x509",
  79         "x509_info",
  80         "x509_pkey",
  81         "x509_crl",
  82         "x509_req",
  83         "dsa",
  84         "rsa",
  85         "evp_pkey",
  86         "x509_store",
  87         "ssl_ctx",
  88         "ssl_cert",
  89         "ssl_session",
  90         "ssl_sess_cert",
  91         "ssl",
  92         "rand",
  93         "debug_malloc",
  94         "BIO",
  95         "gethostbyname",
  96         "getservbyname",
  97         "readdir",
  98         "RSA_blinding",
  99         "dh",
 100         "debug_malloc2",
 101         "dso",
 102 #if CRYPTO_NUM_LOCKS != 27
 103 # error "Inconsistency between crypto.h and cryptlib.c"
 104 #endif
 105         };
 106
 107 /* This is for applications to allocate new type names in the non-dynamic
 108    array of lock names.  These are numbered with positive numbers.  */
 109 static STACK *app_locks=NULL;
 110
 111 /* For applications that want a more dynamic way of handling threads, the
 112    following stack is used.  These are externally numbered with negative
 113    numbers.  */
 114 static STACK_OF(CRYPTO_dynlock) *dyn_locks=NULL;
 115
 116
 117 static void (MS_FAR *locking_callback)(int mode,int type,
 118         const char *file,int line)=NULL;
 119 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 120         int type,const char *file,int line)=NULL;
 121 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 122 static CRYPTO_dynlock *(MS_FAR *dynlock_create_callback)(const char *file,
 123         int line)=NULL;
 124 static void (MS_FAR *dynlock_locking_callback)(int mode, CRYPTO_dynlock *l,
 125         const char *file,int line)=NULL;
 126 static void (MS_FAR *dynlock_destroy_callback)(CRYPTO_dynlock *l,
 127         const char *file,int line)=NULL;
 128 static int (MS_FAR *add_dynlock_callback)(int *pointer,int amount,
 129         CRYPTO_dynlock *l,const char *file,int line)=NULL;
 130
 131 int CRYPTO_get_new_lockid(char *name)
 132         {
 133         char *str;
 134         int i;
 135
 136         /* A hack to make Visual C++ 5.0 work correctly when linking as
 137          * a DLL using /MT. Without this, the application cannot use
 138          * and floating point printf's.
 139          * It also seems to be needed for Visual C 1.5 (win16) */
 140 #if defined(WIN32) || defined(WIN16)
 141         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 142 #endif
 143
 144         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 145                 {
 146                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 147                 return(0);
 148                 }
 149         if ((str=BUF_strdup(name)) == NULL)
 150                 {
 151                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 152                 return(0);
 153                 }
 154         i=sk_push(app_locks,str);
 155         if (!i)
 156                 OPENSSL_free(str);
 157         else
 158                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 159         return(i);
 160         }
 161
 162 int CRYPTO_num_locks(void)
 163         {
 164         return CRYPTO_NUM_LOCKS;
 165         }
 166
 167 int CRYPTO_get_new_dynlockid(void)
 168         {
 169         int i = 0;
 170         CRYPTO_dynlock *pointer = NULL;
 171
 172         if (dynlock_create_callback == NULL)
 173                 {
 174                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,CRYPTO_R_NO_DYNLOCK_CREATE_CALLBACK);
 175                 return(0);
 176                 }
 177         if ((dyn_locks == NULL)
 178                 && ((dyn_locks=sk_new_null()) == NULL))
 179                 {
 180                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 181                 return(0);
 182                 }
 183
 184         pointer = dynlock_create_callback(__FILE__,__LINE__);
 185         if (pointer == NULL)
 186                 {
 187                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_DYNLOCKID,ERR_R_MALLOC_FAILURE);
 188                 return(0);
 189                 }
 190         i=sk_CRYPTO_dynlock_push(dyn_locks,pointer);
 191         if (!i)
 192                 dynlock_destroy_callback(pointer,__FILE__,__LINE__);
 193         else
 194                 i += 1; /* to avoid 0 */
 195         return -i;
 196         }
 197
 198 void CRYPTO_destroy_dynlockid(int i)
 199         {
 200         if (i)
 201                 i = -i-1;
 202         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 203                 return;
 204         if (dynlock_destroy_callback == NULL)
 205                 return;
 206         dynlock_destroy_callback(sk_CRYPTO_dynlock_value(dyn_locks, i),
 207                 __FILE__,__LINE__);
 208         sk_CRYPTO_dynlock_set(dyn_locks, i, NULL);
 209         }
 210
 211 CRYPTO_dynlock *CRYPTO_get_dynlock_value(int i)
 212         {
 213         if (i)
 214                 i = -i-1;
 215         if (dyn_locks == NULL || i >= sk_CRYPTO_dynlock_num(dyn_locks))
 216                 return NULL;
 217         return sk_CRYPTO_dynlock_value(dyn_locks, i);
 218         }
 219
 220 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 221                 int line)
 222         {
 223         return(locking_callback);
 224         }
 225
 226 void (*CRYPTO_get_dynlock_lock_callback(void))(int mode,CRYPTO_dynlock *l,
 227                                                const char *file,int line)
 228         {
 229         return(dynlock_locking_callback);
 230         }
 231
 232 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 233                                           const char *file,int line)
 234         {
 235         return(add_lock_callback);
 236         }
 237
 238 int (*CRYPTO_get_add_dynlock_callback(void))(int *num,int mount,
 239                                              CRYPTO_dynlock *l,
 240                                              const char *file,int line)
 241         {
 242         return(add_dynlock_callback);
 243         }
 244
 245 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 246                                               const char *file,int line))
 247         {
 248         locking_callback=func;
 249         }
 250
 251 void CRYPTO_set_dynlock_locking_callback(void (*func)(int mode,
 252                                                       CRYPTO_dynlock *l,
 253                                                       const char *file,
 254                                                       int line))
 255         {
 256         dynlock_locking_callback=func;
 257         }
 258
 259 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 260                                               const char *file,int line))
 261         {
 262         add_lock_callback=func;
 263         }
 264
 265 void CRYPTO_set_add_dynlock_lock_callback(int (*func)(int *num,int mount,
 266                                                       CRYPTO_dynlock *l,
 267                                                       const char *file,
 268                                                       int line))
 269         {
 270         add_dynlock_callback=func;
 271         }
 272
 273 unsigned long (*CRYPTO_get_id_callback(void))(void)
 274         {
 275         return(id_callback);
 276         }
 277
 278 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 279         {
 280         id_callback=func;
 281         }
 282
 283 unsigned long CRYPTO_thread_id(void)
 284         {
 285         unsigned long ret=0;
 286
 287         if (id_callback == NULL)
 288                 {
 289 #ifdef WIN16
 290                 ret=(unsigned long)GetCurrentTask();
 291 #elif defined(WIN32)
 292                 ret=(unsigned long)GetCurrentThreadId();
 293 #elif defined(GETPID_IS_MEANINGLESS)
 294                 ret=1L;
 295 #else
 296                 ret=(unsigned long)getpid();
 297 #endif
 298                 }
 299         else
 300                 ret=id_callback();
 301         return(ret);
 302         }
 303
 304 void CRYPTO_lock(int mode, int type, const char *file, int line)
 305         {
 306 #ifdef LOCK_DEBUG
 307                 {
 308                 char *rw_text,*operation_text;
 309
 310                 if (mode & CRYPTO_LOCK)
 311                         operation_text="lock  ";
 312                 else if (mode & CRYPTO_UNLOCK)
 313                         operation_text="unlock";
 314                 else
 315                         operation_text="ERROR ";
 316
 317                 if (mode & CRYPTO_READ)
 318                         rw_text="r";
 319                 else if (mode & CRYPTO_WRITE)
 320                         rw_text="w";
 321                 else
 322                         rw_text="ERROR";
 323
 324                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 325                         CRYPTO_thread_id(), rw_text, operation_text,
 326                         CRYPTO_get_lock_name(type), file, line);
 327                 }
 328 #endif
 329         if (type < 0)
 330                 {
 331                 int i = -type-1;
 332                 if (i < sk_CRYPTO_dynlock_num(dyn_locks))
 333                         dynlock_locking_callback(mode,
 334                                 sk_CRYPTO_dynlock_value(dyn_locks,i),
 335                                 file,line);
 336                 }
 337         else
 338                 if (locking_callback != NULL)
 339                         locking_callback(mode,type,file,line);
 340         }
 341
 342 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 343              int line)
 344         {
 345         int ret = 0;
 346
 347         if (add_lock_callback != NULL)
 348                 {
 349 #ifdef LOCK_DEBUG
 350                 int before= *pointer;
 351 #endif
 352
 353                 if (type < 0)
 354                         {
 355                         int i = -type-1;
 356                         if (i >= sk_CRYPTO_dynlock_num(dyn_locks))
 357                                 /* FIXME: This is superbly dangerous if there
 358                                    are threads competing on this value, but
 359                                    hey, if the user used an invalid lock... */
 360                                 ret=(*pointer + amount);
 361                         else
 362                                 ret=add_dynlock_callback(pointer,amount,
 363                                         sk_CRYPTO_dynlock_value(dyn_locks,i),
 364                                         file,line);
 365                         }
 366                 else
 367                         ret=add_lock_callback(pointer,amount,type,file,line);
 368 #ifdef LOCK_DEBUG
 369                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 370                         CRYPTO_thread_id(),
 371                         before,amount,ret,
 372                         CRYPTO_get_lock_name(type),
 373                         file,line);
 374 #endif
 375                 *pointer=ret;
 376                 }
 377         else
 378                 {
 379                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 380
 381                 ret= *pointer+amount;
 382 #ifdef LOCK_DEBUG
 383                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 384                         CRYPTO_thread_id(),
 385                         *pointer,amount,ret,
 386                         CRYPTO_get_lock_name(type),
 387                         file,line);
 388 #endif
 389                 *pointer=ret;
 390                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 391                 }
 392         return(ret);
 393         }
 394
 395 const char *CRYPTO_get_lock_name(int type)
 396         {
 397         if (type < 0)
 398                 return("dynamic");
 399         else if (type < CRYPTO_NUM_LOCKS)
 400                 return(lock_names[type]);
 401         else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
 402                 return("ERROR");
 403         else
 404                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 405         }
 406
 407 #ifdef _DLL
 408 #ifdef WIN32
 409
 410 /* All we really need to do is remove the 'error' state when a thread
 411  * detaches */
 412
 413 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 414              LPVOID lpvReserved)
 415         {
 416         switch(fdwReason)
 417                 {
 418         case DLL_PROCESS_ATTACH:
 419                 break;
 420         case DLL_THREAD_ATTACH:
 421                 break;
 422         case DLL_THREAD_DETACH:
 423                 ERR_remove_state(0);
 424                 break;
 425         case DLL_PROCESS_DETACH:
 426                 break;
 427                 }
 428         return(TRUE);
 429         }
 430 #endif
 431
 432 #endif