crypto/openssl-0.9/crypto/bio/bss_file.c

   1 /* crypto/bio/bss_file.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 /*
  60  * 03-Dec-1997  rdenny@dc3.com  Fix bug preventing use of stdin/stdout
  61  *              with binary data (e.g. asn1parse -inform DER < xxx) under
  62  *              Windows
  63  */
  64
  65 #ifndef HEADER_BSS_FILE_C
  66 #define HEADER_BSS_FILE_C
  67
  68 #if defined(__linux) || defined(__sun) || defined(__hpux)
  69 /* Following definition aliases fopen to fopen64 on above mentioned
  70  * platforms. This makes it possible to open and sequentially access
  71  * files larger than 2GB from 32-bit application. It does not allow to
  72  * traverse them beyond 2GB with fseek/ftell, but on the other hand *no*
  73  * 32-bit platform permits that, not with fseek/ftell. Not to mention
  74  * that breaking 2GB limit for seeking would require surgery to *our*
  75  * API. But sequential access suffices for practical cases when you
  76  * can run into large files, such as fingerprinting, so we can let API
  77  * alone. For reference, the list of 32-bit platforms which allow for
  78  * sequential access of large files without extra "magic" comprise *BSD,
  79  * Darwin, IRIX...
  80  */
  81 #ifndef _FILE_OFFSET_BITS
  82 #define _FILE_OFFSET_BITS 64
  83 #endif
  84 #endif
  85
  86 #include <stdio.h>
  87 #include <errno.h>
  88 #include "cryptlib.h"
  89 #include "bio_lcl.h"
  90 #include <openssl/err.h>
  91
  92 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
  93 #include <nwfileio.h>
  94 #endif
  95
  96 #if !defined(OPENSSL_NO_STDIO)
  97
  98 static int MS_CALLBACK file_write(BIO *h, const char *buf, int num);
  99 static int MS_CALLBACK file_read(BIO *h, char *buf, int size);
 100 static int MS_CALLBACK file_puts(BIO *h, const char *str);
 101 static int MS_CALLBACK file_gets(BIO *h, char *str, int size);
 102 static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
 103 static int MS_CALLBACK file_new(BIO *h);
 104 static int MS_CALLBACK file_free(BIO *data);
 105 static BIO_METHOD methods_filep=
 106         {
 107         BIO_TYPE_FILE,
 108         "FILE pointer",
 109         file_write,
 110         file_read,
 111         file_puts,
 112         file_gets,
 113         file_ctrl,
 114         file_new,
 115         file_free,
 116         NULL,
 117         };
 118
 119 BIO *BIO_new_file(const char *filename, const char *mode)
 120         {
 121         BIO *ret;
 122         FILE *file;
 123
 124         if ((file=fopen(filename,mode)) == NULL)
 125                 {
 126                 SYSerr(SYS_F_FOPEN,get_last_sys_error());
 127                 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
 128                 if (errno == ENOENT)
 129                         BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE);
 130                 else
 131                         BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
 132                 return(NULL);
 133                 }
 134         if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
 135                 {
 136                 fclose(file);
 137                 return(NULL);
 138                 }
 139
 140         BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
 141         BIO_set_fp(ret,file,BIO_CLOSE);
 142         return(ret);
 143         }
 144
 145 BIO *BIO_new_fp(FILE *stream, int close_flag)
 146         {
 147         BIO *ret;
 148
 149         if ((ret=BIO_new(BIO_s_file())) == NULL)
 150                 return(NULL);
 151
 152         BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */
 153         BIO_set_fp(ret,stream,close_flag);
 154         return(ret);
 155         }
 156
 157 BIO_METHOD *BIO_s_file(void)
 158         {
 159         return(&methods_filep);
 160         }
 161
 162 static int MS_CALLBACK file_new(BIO *bi)
 163         {
 164         bi->init=0;
 165         bi->num=0;
 166         bi->ptr=NULL;
 167         bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */
 168         return(1);
 169         }
 170
 171 static int MS_CALLBACK file_free(BIO *a)
 172         {
 173         if (a == NULL) return(0);
 174         if (a->shutdown)
 175                 {
 176                 if ((a->init) && (a->ptr != NULL))
 177                         {
 178                         if (a->flags&BIO_FLAGS_UPLINK)
 179                                 UP_fclose (a->ptr);
 180                         else
 181                                 fclose (a->ptr);
 182                         a->ptr=NULL;
 183                         a->flags=BIO_FLAGS_UPLINK;
 184                         }
 185                 a->init=0;
 186                 }
 187         return(1);
 188         }
 189
 190 static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
 191         {
 192         int ret=0;
 193
 194         if (b->init && (out != NULL))
 195                 {
 196                 if (b->flags&BIO_FLAGS_UPLINK)
 197                         ret=UP_fread(out,1,(int)outl,b->ptr);
 198                 else
 199                         ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 200                 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr))
 201                         {
 202                         SYSerr(SYS_F_FREAD,get_last_sys_error());
 203                         BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB);
 204                         ret=-1;
 205                         }
 206                 }
 207         return(ret);
 208         }
 209
 210 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
 211         {
 212         int ret=0;
 213
 214         if (b->init && (in != NULL))
 215                 {
 216                 if (b->flags&BIO_FLAGS_UPLINK)
 217                         ret=UP_fwrite(in,(int)inl,1,b->ptr);
 218                 else
 219                         ret=fwrite(in,(int)inl,1,(FILE *)b->ptr);
 220                 if (ret)
 221                         ret=inl;
 222                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 223                 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
 224                  * out version above can cause 'inl' write calls under
 225                  * some stupid stdio implementations (VMS) */
 226                 }
 227         return(ret);
 228         }
 229
 230 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
 231         {
 232         long ret=1;
 233         FILE *fp=(FILE *)b->ptr;
 234         FILE **fpp;
 235         char p[4];
 236
 237         switch (cmd)
 238                 {
 239         case BIO_C_FILE_SEEK:
 240         case BIO_CTRL_RESET:
 241                 if (b->flags&BIO_FLAGS_UPLINK)
 242                         ret=(long)UP_fseek(b->ptr,num,0);
 243                 else
 244                         ret=(long)fseek(fp,num,0);
 245                 break;
 246         case BIO_CTRL_EOF:
 247                 if (b->flags&BIO_FLAGS_UPLINK)
 248                         ret=(long)UP_feof(fp);
 249                 else
 250                         ret=(long)feof(fp);
 251                 break;
 252         case BIO_C_FILE_TELL:
 253         case BIO_CTRL_INFO:
 254                 if (b->flags&BIO_FLAGS_UPLINK)
 255                         ret=UP_ftell(b->ptr);
 256                 else
 257                         ret=ftell(fp);
 258                 break;
 259         case BIO_C_SET_FILE_PTR:
 260                 file_free(b);
 261                 b->shutdown=(int)num&BIO_CLOSE;
 262                 b->ptr=ptr;
 263                 b->init=1;
 264 #if BIO_FLAGS_UPLINK!=0
 265 #if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
 266 #define _IOB_ENTRIES 20
 267 #endif
 268 #if defined(_IOB_ENTRIES)
 269                 /* Safety net to catch purely internal BIO_set_fp calls */
 270                 if ((size_t)ptr >= (size_t)stdin &&
 271                     (size_t)ptr <  (size_t)(stdin+_IOB_ENTRIES))
 272                         BIO_clear_flags(b,BIO_FLAGS_UPLINK);
 273 #endif
 274 #endif
 275 #ifdef UP_fsetmode
 276                 if (b->flags&BIO_FLAGS_UPLINK)
 277                         UP_fsetmode(b->ptr,num&BIO_FP_TEXT?'t':'b');
 278                 else
 279 #endif
 280                 {
 281 #if defined(OPENSSL_SYS_WINDOWS)
 282                 int fd = fileno((FILE*)ptr);
 283                 if (num & BIO_FP_TEXT)
 284                         _setmode(fd,_O_TEXT);
 285                 else
 286                         _setmode(fd,_O_BINARY);
 287 #elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
 288                 int fd = fileno((FILE*)ptr);
 289          /* Under CLib there are differences in file modes
 290          */
 291                 if (num & BIO_FP_TEXT)
 292                         setmode(fd,O_TEXT);
 293                 else
 294                         setmode(fd,O_BINARY);
 295 #elif defined(OPENSSL_SYS_MSDOS)
 296                 int fd = fileno((FILE*)ptr);
 297                 /* Set correct text/binary mode */
 298                 if (num & BIO_FP_TEXT)
 299                         _setmode(fd,_O_TEXT);
 300                 /* Dangerous to set stdin/stdout to raw (unless redirected) */
 301                 else
 302                         {
 303                         if (fd == STDIN_FILENO || fd == STDOUT_FILENO)
 304                                 {
 305                                 if (isatty(fd) <= 0)
 306                                         _setmode(fd,_O_BINARY);
 307                                 }
 308                         else
 309                                 _setmode(fd,_O_BINARY);
 310                         }
 311 #elif defined(OPENSSL_SYS_OS2)
 312                 int fd = fileno((FILE*)ptr);
 313                 if (num & BIO_FP_TEXT)
 314                         setmode(fd, O_TEXT);
 315                 else
 316                         setmode(fd, O_BINARY);
 317 #endif
 318                 }
 319                 break;
 320         case BIO_C_SET_FILENAME:
 321                 file_free(b);
 322                 b->shutdown=(int)num&BIO_CLOSE;
 323                 if (num & BIO_FP_APPEND)
 324                         {
 325                         if (num & BIO_FP_READ)
 326                                 BUF_strlcpy(p,"a+",sizeof p);
 327                         else    BUF_strlcpy(p,"a",sizeof p);
 328                         }
 329                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 330                         BUF_strlcpy(p,"r+",sizeof p);
 331                 else if (num & BIO_FP_WRITE)
 332                         BUF_strlcpy(p,"w",sizeof p);
 333                 else if (num & BIO_FP_READ)
 334                         BUF_strlcpy(p,"r",sizeof p);
 335                 else
 336                         {
 337                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 338                         ret=0;
 339                         break;
 340                         }
 341 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
 342                 if (!(num & BIO_FP_TEXT))
 343                         strcat(p,"b");
 344                 else
 345                         strcat(p,"t");
 346 #endif
 347 #if defined(OPENSSL_SYS_NETWARE)
 348                 if (!(num & BIO_FP_TEXT))
 349                         strcat(p,"b");
 350                 else
 351                         strcat(p,"t");
 352 #endif
 353                 fp=fopen(ptr,p);
 354                 if (fp == NULL)
 355                         {
 356                         SYSerr(SYS_F_FOPEN,get_last_sys_error());
 357                         ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
 358                         BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
 359                         ret=0;
 360                         break;
 361                         }
 362                 b->ptr=fp;
 363                 b->init=1;
 364                 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
 365                 break;
 366         case BIO_C_GET_FILE_PTR:
 367                 /* the ptr parameter is actually a FILE ** in this case. */
 368                 if (ptr != NULL)
 369                         {
 370                         fpp=(FILE **)ptr;
 371                         *fpp=(FILE *)b->ptr;
 372                         }
 373                 break;
 374         case BIO_CTRL_GET_CLOSE:
 375                 ret=(long)b->shutdown;
 376                 break;
 377         case BIO_CTRL_SET_CLOSE:
 378                 b->shutdown=(int)num;
 379                 break;
 380         case BIO_CTRL_FLUSH:
 381                 if (b->flags&BIO_FLAGS_UPLINK)
 382                         UP_fflush(b->ptr);
 383                 else
 384                         fflush((FILE *)b->ptr);
 385                 break;
 386         case BIO_CTRL_DUP:
 387                 ret=1;
 388                 break;
 389
 390         case BIO_CTRL_WPENDING:
 391         case BIO_CTRL_PENDING:
 392         case BIO_CTRL_PUSH:
 393         case BIO_CTRL_POP:
 394         default:
 395                 ret=0;
 396                 break;
 397                 }
 398         return(ret);
 399         }
 400
 401 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
 402         {
 403         int ret=0;
 404
 405         buf[0]='\0';
 406         if (bp->flags&BIO_FLAGS_UPLINK)
 407                 UP_fgets(buf,size,bp->ptr);
 408         else
 409                 fgets(buf,size,(FILE *)bp->ptr);
 410         if (buf[0] != '\0')
 411                 ret=strlen(buf);
 412         return(ret);
 413         }
 414
 415 static int MS_CALLBACK file_puts(BIO *bp, const char *str)
 416         {
 417         int n,ret;
 418
 419         n=strlen(str);
 420         ret=file_write(bp,str,n);
 421         return(ret);
 422         }
 423
 424 #endif /* OPENSSL_NO_STDIO */
 425
 426 #endif /* HEADER_BSS_FILE_C */
 427
 428