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 #if CRYPTO_NUM_LOCKS != 26
  98 # error "Inconsistency between crypto.h and cryptlib.c"
  99 #endif
 100         };
 101
 102 static STACK *app_locks=NULL;
 103
 104 static void (MS_FAR *locking_callback)(int mode,int type,
 105         const char *file,int line)=NULL;
 106 static int (MS_FAR *add_lock_callback)(int *pointer,int amount,
 107         int type,const char *file,int line)=NULL;
 108 static unsigned long (MS_FAR *id_callback)(void)=NULL;
 109 int CRYPTO_get_new_lockid(char *name)
 110         {
 111         char *str;
 112         int i;
 113
 114         /* A hack to make Visual C++ 5.0 work correctly when linking as
 115          * a DLL using /MT. Without this, the application cannot use
 116          * and floating point printf's.
 117          * It also seems to be needed for Visual C 1.5 (win16) */
 118 #if defined(WIN32) || defined(WIN16)
 119         SSLeay_MSVC5_hack=(double)name[0]*(double)name[1];
 120 #endif
 121
 122         if ((app_locks == NULL) && ((app_locks=sk_new_null()) == NULL))
 123                 {
 124                 CRYPTOerr(CRYPTO_F_CRYPTO_GET_NEW_LOCKID,ERR_R_MALLOC_FAILURE);
 125                 return(0);
 126                 }
 127         if ((str=BUF_strdup(name)) == NULL)
 128                 return(0);
 129         i=sk_push(app_locks,str);
 130         if (!i)
 131                 Free(str);
 132         else
 133                 i+=CRYPTO_NUM_LOCKS; /* gap of one :-) */
 134         return(i);
 135         }
 136
 137 int CRYPTO_num_locks(void)
 138         {
 139         return CRYPTO_NUM_LOCKS;
 140         }
 141
 142 void (*CRYPTO_get_locking_callback(void))(int mode,int type,const char *file,
 143                 int line)
 144         {
 145         return(locking_callback);
 146         }
 147
 148 int (*CRYPTO_get_add_lock_callback(void))(int *num,int mount,int type,
 149                                           const char *file,int line)
 150         {
 151         return(add_lock_callback);
 152         }
 153
 154 void CRYPTO_set_locking_callback(void (*func)(int mode,int type,
 155                                               const char *file,int line))
 156         {
 157         locking_callback=func;
 158         }
 159
 160 void CRYPTO_set_add_lock_callback(int (*func)(int *num,int mount,int type,
 161                                               const char *file,int line))
 162         {
 163         add_lock_callback=func;
 164         }
 165
 166 unsigned long (*CRYPTO_get_id_callback(void))(void)
 167         {
 168         return(id_callback);
 169         }
 170
 171 void CRYPTO_set_id_callback(unsigned long (*func)(void))
 172         {
 173         id_callback=func;
 174         }
 175
 176 unsigned long CRYPTO_thread_id(void)
 177         {
 178         unsigned long ret=0;
 179
 180         if (id_callback == NULL)
 181                 {
 182 #ifdef WIN16
 183                 ret=(unsigned long)GetCurrentTask();
 184 #elif defined(WIN32)
 185                 ret=(unsigned long)GetCurrentThreadId();
 186 #elif defined(GETPID_IS_MEANINGLESS)
 187                 ret=1L;
 188 #else
 189                 ret=(unsigned long)getpid();
 190 #endif
 191                 }
 192         else
 193                 ret=id_callback();
 194         return(ret);
 195         }
 196
 197 void CRYPTO_lock(int mode, int type, const char *file, int line)
 198         {
 199 #ifdef LOCK_DEBUG
 200                 {
 201                 char *rw_text,*operation_text;
 202
 203                 if (mode & CRYPTO_LOCK)
 204                         operation_text="lock  ";
 205                 else if (mode & CRYPTO_UNLOCK)
 206                         operation_text="unlock";
 207                 else
 208                         operation_text="ERROR ";
 209
 210                 if (mode & CRYPTO_READ)
 211                         rw_text="r";
 212                 else if (mode & CRYPTO_WRITE)
 213                         rw_text="w";
 214                 else
 215                         rw_text="ERROR";
 216
 217                 fprintf(stderr,"lock:%08lx:(%s)%s %-18s %s:%d\n",
 218                         CRYPTO_thread_id(), rw_text, operation_text,
 219                         CRYPTO_get_lock_name(type), file, line);
 220                 }
 221 #endif
 222         if (locking_callback != NULL)
 223                 locking_callback(mode,type,file,line);
 224         }
 225
 226 int CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
 227              int line)
 228         {
 229         int ret;
 230
 231         if (add_lock_callback != NULL)
 232                 {
 233 #ifdef LOCK_DEBUG
 234                 int before= *pointer;
 235 #endif
 236
 237                 ret=add_lock_callback(pointer,amount,type,file,line);
 238 #ifdef LOCK_DEBUG
 239                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 240                         CRYPTO_thread_id(),
 241                         before,amount,ret,
 242                         CRYPTO_get_lock_name(type),
 243                         file,line);
 244 #endif
 245                 *pointer=ret;
 246                 }
 247         else
 248                 {
 249                 CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE,type,file,line);
 250
 251                 ret= *pointer+amount;
 252 #ifdef LOCK_DEBUG
 253                 fprintf(stderr,"ladd:%08lx:%2d+%2d->%2d %-18s %s:%d\n",
 254                         CRYPTO_thread_id(),
 255                         *pointer,amount,ret,
 256                         CRYPTO_get_lock_name(type),
 257                         file,line);
 258 #endif
 259                 *pointer=ret;
 260                 CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE,type,file,line);
 261                 }
 262         return(ret);
 263         }
 264
 265 const char *CRYPTO_get_lock_name(int type)
 266         {
 267         if (type < 0)
 268                 return("ERROR");
 269         else if (type < CRYPTO_NUM_LOCKS)
 270                 return(lock_names[type]);
 271         else if (type-CRYPTO_NUM_LOCKS >= sk_num(app_locks))
 272                 return("ERROR");
 273         else
 274                 return(sk_value(app_locks,type-CRYPTO_NUM_LOCKS));
 275         }
 276
 277 #ifdef _DLL
 278 #ifdef WIN32
 279
 280 /* All we really need to do is remove the 'error' state when a thread
 281  * detaches */
 282
 283 BOOL WINAPI DLLEntryPoint(HINSTANCE hinstDLL, DWORD fdwReason,
 284              LPVOID lpvReserved)
 285         {
 286         switch(fdwReason)
 287                 {
 288         case DLL_PROCESS_ATTACH:
 289                 break;
 290         case DLL_THREAD_ATTACH:
 291                 break;
 292         case DLL_THREAD_DETACH:
 293                 ERR_remove_state(0);
 294                 break;
 295         case DLL_PROCESS_DETACH:
 296                 break;
 297                 }
 298         return(TRUE);
 299         }
 300 #endif
 301
 302 #endif