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 file_write(BIO *h, const char *buf, int num);
  99 static int file_read(BIO *h, char *buf, int size);
 100 static int file_puts(BIO *h, const char *str);
 101 static int file_gets(BIO *h, char *str, int size);
 102 static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
 103 static int file_new(BIO *h);
 104 static int 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=NULL;
 123
 124 #if defined(_WIN32) && defined(CP_UTF8)
 125         int sz, len_0 = (int)strlen(filename)+1;
 126         DWORD flags;
 127
 128         /*
 129          * Basically there are three cases to cover: a) filename is
 130          * pure ASCII string; b) actual UTF-8 encoded string and
 131          * c) locale-ized string, i.e. one containing 8-bit
 132          * characters that are meaningful in current system locale.
 133          * If filename is pure ASCII or real UTF-8 encoded string,
 134          * MultiByteToWideChar succeeds and _wfopen works. If
 135          * filename is locale-ized string, chances are that
 136          * MultiByteToWideChar fails reporting
 137          * ERROR_NO_UNICODE_TRANSLATION, in which case we fall
 138          * back to fopen...
 139          */
 140         if ((sz=MultiByteToWideChar(CP_UTF8,(flags=MB_ERR_INVALID_CHARS),
 141                                         filename,len_0,NULL,0))>0 ||
 142             (GetLastError()==ERROR_INVALID_FLAGS &&
 143              (sz=MultiByteToWideChar(CP_UTF8,(flags=0),
 144                                         filename,len_0,NULL,0))>0)
 145            )
 146                 {
 147                 WCHAR  wmode[8];
 148                 WCHAR *wfilename = _alloca(sz*sizeof(WCHAR));
 149
 150                 if (MultiByteToWideChar(CP_UTF8,flags,
 151                                         filename,len_0,wfilename,sz) &&
 152                     MultiByteToWideChar(CP_UTF8,0,mode,strlen(mode)+1,
 153                                         wmode,sizeof(wmode)/sizeof(wmode[0])) &&
 154                     (file=_wfopen(wfilename,wmode))==NULL &&
 155                     (errno==ENOENT || errno==EBADF)
 156                    )
 157                         {
 158                         /*
 159                          * UTF-8 decode succeeded, but no file, filename
 160                          * could still have been locale-ized...
 161                          */
 162                         file = fopen(filename,mode);
 163                         }
 164                 }
 165         else if (GetLastError()==ERROR_NO_UNICODE_TRANSLATION)
 166                 {
 167                 file = fopen(filename,mode);
 168                 }
 169 #else
 170         file=fopen(filename,mode);
 171 #endif
 172         if (file == NULL)
 173                 {
 174                 SYSerr(SYS_F_FOPEN,get_last_sys_error());
 175                 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
 176                 if (errno == ENOENT)
 177                         BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE);
 178                 else
 179                         BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
 180                 return(NULL);
 181                 }
 182         if ((ret=BIO_new(BIO_s_file())) == NULL)
 183                 {
 184                 fclose(file);
 185                 return(NULL);
 186                 }
 187
 188         BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
 189         BIO_set_fp(ret,file,BIO_CLOSE);
 190         return(ret);
 191         }
 192
 193 BIO *BIO_new_fp(FILE *stream, int close_flag)
 194         {
 195         BIO *ret;
 196
 197         if ((ret=BIO_new(BIO_s_file())) == NULL)
 198                 return(NULL);
 199
 200         BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */
 201         BIO_set_fp(ret,stream,close_flag);
 202         return(ret);
 203         }
 204
 205 BIO_METHOD *BIO_s_file(void)
 206         {
 207         return(&methods_filep);
 208         }
 209
 210 static int file_new(BIO *bi)
 211         {
 212         bi->init=0;
 213         bi->num=0;
 214         bi->ptr=NULL;
 215         bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */
 216         return(1);
 217         }
 218
 219 static int file_free(BIO *a)
 220         {
 221         if (a == NULL) return(0);
 222         if (a->shutdown)
 223                 {
 224                 if ((a->init) && (a->ptr != NULL))
 225                         {
 226                         if (a->flags&BIO_FLAGS_UPLINK)
 227                                 UP_fclose (a->ptr);
 228                         else
 229                                 fclose (a->ptr);
 230                         a->ptr=NULL;
 231                         a->flags=BIO_FLAGS_UPLINK;
 232                         }
 233                 a->init=0;
 234                 }
 235         return(1);
 236         }
 237
 238 static int file_read(BIO *b, char *out, int outl)
 239         {
 240         int ret=0;
 241
 242         if (b->init && (out != NULL))
 243                 {
 244                 if (b->flags&BIO_FLAGS_UPLINK)
 245                         ret=UP_fread(out,1,(int)outl,b->ptr);
 246                 else
 247                         ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 248                 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr))
 249                         {
 250                         SYSerr(SYS_F_FREAD,get_last_sys_error());
 251                         BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB);
 252                         ret=-1;
 253                         }
 254                 }
 255         return(ret);
 256         }
 257
 258 static int file_write(BIO *b, const char *in, int inl)
 259         {
 260         int ret=0;
 261
 262         if (b->init && (in != NULL))
 263                 {
 264                 if (b->flags&BIO_FLAGS_UPLINK)
 265                         ret=UP_fwrite(in,(int)inl,1,b->ptr);
 266                 else
 267                         ret=fwrite(in,(int)inl,1,(FILE *)b->ptr);
 268                 if (ret)
 269                         ret=inl;
 270                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 271                 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
 272                  * out version above can cause 'inl' write calls under
 273                  * some stupid stdio implementations (VMS) */
 274                 }
 275         return(ret);
 276         }
 277
 278 static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
 279         {
 280         long ret=1;
 281         FILE *fp=(FILE *)b->ptr;
 282         FILE **fpp;
 283         char p[4];
 284
 285         switch (cmd)
 286                 {
 287         case BIO_C_FILE_SEEK:
 288         case BIO_CTRL_RESET:
 289                 if (b->flags&BIO_FLAGS_UPLINK)
 290                         ret=(long)UP_fseek(b->ptr,num,0);
 291                 else
 292                         ret=(long)fseek(fp,num,0);
 293                 break;
 294         case BIO_CTRL_EOF:
 295                 if (b->flags&BIO_FLAGS_UPLINK)
 296                         ret=(long)UP_feof(fp);
 297                 else
 298                         ret=(long)feof(fp);
 299                 break;
 300         case BIO_C_FILE_TELL:
 301         case BIO_CTRL_INFO:
 302                 if (b->flags&BIO_FLAGS_UPLINK)
 303                         ret=UP_ftell(b->ptr);
 304                 else
 305                         ret=ftell(fp);
 306                 break;
 307         case BIO_C_SET_FILE_PTR:
 308                 file_free(b);
 309                 b->shutdown=(int)num&BIO_CLOSE;
 310                 b->ptr=ptr;
 311                 b->init=1;
 312 #if BIO_FLAGS_UPLINK!=0
 313 #if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
 314 #define _IOB_ENTRIES 20
 315 #endif
 316 #if defined(_IOB_ENTRIES)
 317                 /* Safety net to catch purely internal BIO_set_fp calls */
 318                 if ((size_t)ptr >= (size_t)stdin &&
 319                     (size_t)ptr <  (size_t)(stdin+_IOB_ENTRIES))
 320                         BIO_clear_flags(b,BIO_FLAGS_UPLINK);
 321 #endif
 322 #endif
 323 #ifdef UP_fsetmod
 324                 if (b->flags&BIO_FLAGS_UPLINK)
 325                         UP_fsetmod(b->ptr,(char)((num&BIO_FP_TEXT)?'t':'b'));
 326                 else
 327 #endif
 328                 {
 329 #if defined(OPENSSL_SYS_WINDOWS)
 330                 int fd = _fileno((FILE*)ptr);
 331                 if (num & BIO_FP_TEXT)
 332                         _setmode(fd,_O_TEXT);
 333                 else
 334                         _setmode(fd,_O_BINARY);
 335 #elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
 336                 int fd = fileno((FILE*)ptr);
 337                 /* Under CLib there are differences in file modes */
 338                 if (num & BIO_FP_TEXT)
 339                         setmode(fd,O_TEXT);
 340                 else
 341                         setmode(fd,O_BINARY);
 342 #elif defined(OPENSSL_SYS_MSDOS)
 343                 int fd = fileno((FILE*)ptr);
 344                 /* Set correct text/binary mode */
 345                 if (num & BIO_FP_TEXT)
 346                         _setmode(fd,_O_TEXT);
 347                 /* Dangerous to set stdin/stdout to raw (unless redirected) */
 348                 else
 349                         {
 350                         if (fd == STDIN_FILENO || fd == STDOUT_FILENO)
 351                                 {
 352                                 if (isatty(fd) <= 0)
 353                                         _setmode(fd,_O_BINARY);
 354                                 }
 355                         else
 356                                 _setmode(fd,_O_BINARY);
 357                         }
 358 #elif defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
 359                 int fd = fileno((FILE*)ptr);
 360                 if (num & BIO_FP_TEXT)
 361                         setmode(fd, O_TEXT);
 362                 else
 363                         setmode(fd, O_BINARY);
 364 #endif
 365                 }
 366                 break;
 367         case BIO_C_SET_FILENAME:
 368                 file_free(b);
 369                 b->shutdown=(int)num&BIO_CLOSE;
 370                 if (num & BIO_FP_APPEND)
 371                         {
 372                         if (num & BIO_FP_READ)
 373                                 BUF_strlcpy(p,"a+",sizeof p);
 374                         else    BUF_strlcpy(p,"a",sizeof p);
 375                         }
 376                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 377                         BUF_strlcpy(p,"r+",sizeof p);
 378                 else if (num & BIO_FP_WRITE)
 379                         BUF_strlcpy(p,"w",sizeof p);
 380                 else if (num & BIO_FP_READ)
 381                         BUF_strlcpy(p,"r",sizeof p);
 382                 else
 383                         {
 384                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 385                         ret=0;
 386                         break;
 387                         }
 388 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
 389                 if (!(num & BIO_FP_TEXT))
 390                         strcat(p,"b");
 391                 else
 392                         strcat(p,"t");
 393 #endif
 394 #if defined(OPENSSL_SYS_NETWARE)
 395                 if (!(num & BIO_FP_TEXT))
 396                         strcat(p,"b");
 397                 else
 398                         strcat(p,"t");
 399 #endif
 400                 fp=fopen(ptr,p);
 401                 if (fp == NULL)
 402                         {
 403                         SYSerr(SYS_F_FOPEN,get_last_sys_error());
 404                         ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
 405                         BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
 406                         ret=0;
 407                         break;
 408                         }
 409                 b->ptr=fp;
 410                 b->init=1;
 411                 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
 412                 break;
 413         case BIO_C_GET_FILE_PTR:
 414                 /* the ptr parameter is actually a FILE ** in this case. */
 415                 if (ptr != NULL)
 416                         {
 417                         fpp=(FILE **)ptr;
 418                         *fpp=(FILE *)b->ptr;
 419                         }
 420                 break;
 421         case BIO_CTRL_GET_CLOSE:
 422                 ret=(long)b->shutdown;
 423                 break;
 424         case BIO_CTRL_SET_CLOSE:
 425                 b->shutdown=(int)num;
 426                 break;
 427         case BIO_CTRL_FLUSH:
 428                 if (b->flags&BIO_FLAGS_UPLINK)
 429                         UP_fflush(b->ptr);
 430                 else
 431                         fflush((FILE *)b->ptr);
 432                 break;
 433         case BIO_CTRL_DUP:
 434                 ret=1;
 435                 break;
 436
 437         case BIO_CTRL_WPENDING:
 438         case BIO_CTRL_PENDING:
 439         case BIO_CTRL_PUSH:
 440         case BIO_CTRL_POP:
 441         default:
 442                 ret=0;
 443                 break;
 444                 }
 445         return(ret);
 446         }
 447
 448 static int file_gets(BIO *bp, char *buf, int size)
 449         {
 450         int ret=0;
 451
 452         buf[0]='\0';
 453         if (bp->flags&BIO_FLAGS_UPLINK)
 454                 {
 455                 if (!UP_fgets(buf,size,bp->ptr))
 456                         goto err;
 457                 }
 458         else
 459                 {
 460                 if (!fgets(buf,size,(FILE *)bp->ptr))
 461                         goto err;
 462                 }
 463         if (buf[0] != '\0')
 464                 ret=strlen(buf);
 465         err:
 466         return(ret);
 467         }
 468
 469 static int file_puts(BIO *bp, const char *str)
 470         {
 471         int n,ret;
 472
 473         n=strlen(str);
 474         ret=file_write(bp,str,n);
 475         return(ret);
 476         }
 477
 478 #endif /* OPENSSL_NO_STDIO */
 479
 480 #endif /* HEADER_BSS_FILE_C */
 481
 482