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
  64 #if defined(WIN32) || defined(WIN16)
  65 static double SSLeay_MSVC5_hack=0.0; /* and for VC1.5 */
  66 #endif
  67
  68 /* real #defines in crypto.h, keep these upto date */
  69 static const char* lock_names[CRYPTO_NUM_LOCKS] =
  70         {
  71         "<<ERROR>>",
  72         "err",
  73         "err_hash",
  74         "x509",
  75         "x509_info",
  76         "x509_pkey",
  77         "x509_crl",
  78         "x509_req",
  79         "dsa",
  80         "rsa",
  81         "evp_pkey",
  82         "x509_store",
  83         "ssl_ctx",
  84         "ssl_cert",
  85         "ssl_session",
  86         "ssl_sess_cert",
  87         "ssl",
  88         "rand",
  89         "debug_malloc",
  90         "BIO",
  91         "gethostbyname",
  92         "getservbyname",
  93         "readdir",
  94         "RSA_blinding",
  95         "dh",
  96         "debug_malloc2",
  97         "dso",
  98 #if CRYPTO_NUM_LOCKS != 27
  99 # error "Inconsistency between crypto.h and cryptlib.c"
 100 #endif
 101         };
 102
 103 static STACK *app_locks=NULL;
 104
 105 static void (MS_FAR *locking_callback)(int mode,int type,
 106         const char *file,int line)=NULL;
 107 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 108         int type,const char *file,int line)=NULL;
 109 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 110 int CRYPTO_get_new_lockid(char *name)
 111         {
 112         char *str;
 113         int i;
 114
 115         /* A hack to make Visual C++ 5.0 work correctly when linking as
 116          * a DLL using /MT. Without this, the application cannot use
 117          * and floating point printf's.
 118          * It also seems to be needed for Visual C 1.5 (win16) */
 119 #if defined(WIN32) || defined(WIN16)
 120         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 121 #endif
 122
 123         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 124                 {
 125                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 126                 return(0);
 127                 }
 128         if ((str=BUF_strdup(name)) == NULL)
 129                 return(0);
 130         i=sk_push(app_locks,str);
 131         if (!i)
 132                 Free(str);
 133         else
 134                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 135         return(i);
 136         }
 137
 138 int CRYPTO_num_locks(void)
 139         {
 140         return CRYPTO_NUM_LOCKS;
 141         }
 142
 143 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 144                 int line)
 145         {
 146         return(locking_callback);
 147         }
 148
 149 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 150                                           const char *file,int line)
 151         {
 152         return(add_lock_callback);
 153         }
 154
 155 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 156                                               const char *file,int line))
 157         {
 158         locking_callback=func;
 159         }
 160
 161 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 162                                               const char *file,int line))
 163         {
 164         add_lock_callback=func;
 165         }
 166
 167 unsigned long (*CRYPTO_get_id_callback(void))(void)
 168         {
 169         return(id_callback);
 170         }
 171
 172 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 173         {
 174         id_callback=func;
 175         }
 176
 177 unsigned long CRYPTO_thread_id(void)
 178         {
 179         unsigned long ret=0;
 180
 181         if (id_callback == NULL)
 182                 {
 183 #ifdef WIN16
 184                 ret=(unsigned long)GetCurrentTask();
 185 #elif defined(WIN32)
 186                 ret=(unsigned long)GetCurrentThreadId();
 187 #elif defined(GETPID_IS_MEANINGLESS)
 188                 ret=1L;
 189 #else
 190                 ret=(unsigned long)getpid();
 191 #endif
 192                 }
 193         else
 194                 ret=id_callback();
 195         return(ret);
 196         }
 197
 198 void CRYPTO_lock(int mode, int type, const char *file, int line)
 199         {
 200 #ifdef LOCK_DEBUG
 201                 {
 202                 char *rw_text,*operation_text;
 203
 204                 if (mode & CRYPTO_LOCK)
 205                         operation_text="lock  ";
 206                 else if (mode & CRYPTO_UNLOCK)
 207                         operation_text="unlock";
 208                 else
 209                         operation_text="ERROR ";
 210
 211                 if (mode & CRYPTO_READ)
 212                         rw_text="r";
 213                 else if (mode & CRYPTO_WRITE)
 214                         rw_text="w";
 215                 else
 216                         rw_text="ERROR";
 217
 218                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 219                         CRYPTO_thread_id(), rw_text, operation_text,
 220                         CRYPTO_get_lock_name(type), file, line);
 221                 }
 222 #endif
 223         if (locking_callback != NULL)
 224                 locking_callback(mode,type,file,line);
 225         }
 226
 227 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 228              int line)
 229         {
 230         int ret;
 231
 232         if (add_lock_callback != NULL)
 233                 {
 234 #ifdef LOCK_DEBUG
 235                 int before= *pointer;
 236 #endif
 237
 238                 ret=add_lock_callback(pointer,amount,type,file,line);
 239 #ifdef LOCK_DEBUG
 240                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 241                         CRYPTO_thread_id(),
 242                         before,amount,ret,
 243                         CRYPTO_get_lock_name(type),
 244                         file,line);
 245 #endif
 246                 *pointer=ret;
 247                 }
 248         else
 249                 {
 250                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 251
 252                 ret= *pointer+amount;
 253 #ifdef LOCK_DEBUG
 254                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 255                         CRYPTO_thread_id(),
 256                         *pointer,amount,ret,
 257                         CRYPTO_get_lock_name(type),
 258                         file,line);
 259 #endif
 260                 *pointer=ret;
 261                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 262                 }
 263         return(ret);
 264         }
 265
 266 const char *CRYPTO_get_lock_name(int type)
 267         {
 268         if (type < 0)
 269                 return("ERROR");
 270         else if (type < CRYPTO_NUM_LOCKS)
 271                 return(lock_names[type]);
 272         else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
 273                 return("ERROR");
 274         else
 275                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 276         }
 277
 278 #ifdef _DLL
 279 #ifdef WIN32
 280
 281 /* All we really need to do is remove the 'error' state when a thread
 282  * detaches */
 283
 284 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 285              LPVOID lpvReserved)
 286         {
 287         switch(fdwReason)
 288                 {
 289         case DLL_PROCESS_ATTACH:
 290                 break;
 291         case DLL_THREAD_ATTACH:
 292                 break;
 293         case DLL_THREAD_DETACH:
 294                 ERR_remove_state(0);
 295                 break;
 296         case DLL_PROCESS_DETACH:
 297                 break;
 298                 }
 299         return(TRUE);
 300         }
 301 #endif
 302
 303 #endif