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 #include <stdio.h>
  69 #include <errno.h>
  70 #include "cryptlib.h"
  71 #include "bio_lcl.h"
  72 #include <openssl/err.h>
  73
  74 #if !defined(OPENSSL_NO_STDIO)
  75
  76 static int MS_CALLBACK file_write(BIO *h, const char *buf, int num);
  77 static int MS_CALLBACK file_read(BIO *h, char *buf, int size);
  78 static int MS_CALLBACK file_puts(BIO *h, const char *str);
  79 static int MS_CALLBACK file_gets(BIO *h, char *str, int size);
  80 static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
  81 static int MS_CALLBACK file_new(BIO *h);
  82 static int MS_CALLBACK file_free(BIO *data);
  83 static BIO_METHOD methods_filep=
  84         {
  85         BIO_TYPE_FILE,
  86         "FILE pointer",
  87         file_write,
  88         file_read,
  89         file_puts,
  90         file_gets,
  91         file_ctrl,
  92         file_new,
  93         file_free,
  94         NULL,
  95         };
  96
  97 BIO *BIO_new_file(const char *filename, const char *mode)
  98         {
  99         BIO *ret;
 100         FILE *file;
 101
 102         if ((file=fopen(filename,mode)) == NULL)
 103                 {
 104                 SYSerr(SYS_F_FOPEN,get_last_sys_error());
 105                 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
 106                 if (errno == ENOENT)
 107                         BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE);
 108                 else
 109                         BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
 110                 return(NULL);
 111                 }
 112         if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
 113                 return(NULL);
 114
 115         BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
 116         BIO_set_fp(ret,file,BIO_CLOSE);
 117         return(ret);
 118         }
 119
 120 BIO *BIO_new_fp(FILE *stream, int close_flag)
 121         {
 122         BIO *ret;
 123
 124         if ((ret=BIO_new(BIO_s_file())) == NULL)
 125                 return(NULL);
 126
 127         BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */
 128         BIO_set_fp(ret,stream,close_flag);
 129         return(ret);
 130         }
 131
 132 BIO_METHOD *BIO_s_file(void)
 133         {
 134         return(&methods_filep);
 135         }
 136
 137 static int MS_CALLBACK file_new(BIO *bi)
 138         {
 139         bi->init=0;
 140         bi->num=0;
 141         bi->ptr=NULL;
 142         bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */
 143         return(1);
 144         }
 145
 146 static int MS_CALLBACK file_free(BIO *a)
 147         {
 148         if (a == NULL) return(0);
 149         if (a->shutdown)
 150                 {
 151                 if ((a->init) && (a->ptr != NULL))
 152                         {
 153                         if (a->flags&BIO_FLAGS_UPLINK)
 154                                 UP_fclose (a->ptr);
 155                         else
 156                                 fclose (a->ptr);
 157                         a->ptr=NULL;
 158                         a->flags=BIO_FLAGS_UPLINK;
 159                         }
 160                 a->init=0;
 161                 }
 162         return(1);
 163         }
 164
 165 static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
 166         {
 167         int ret=0;
 168
 169         if (b->init && (out != NULL))
 170                 {
 171                 if (b->flags&BIO_FLAGS_UPLINK)
 172                         ret=UP_fread(out,1,(int)outl,b->ptr);
 173                 else
 174                         ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 175                 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr))
 176                         {
 177                         SYSerr(SYS_F_FREAD,get_last_sys_error());
 178                         BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB);
 179                         ret=-1;
 180                         }
 181                 }
 182         return(ret);
 183         }
 184
 185 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
 186         {
 187         int ret=0;
 188
 189         if (b->init && (in != NULL))
 190                 {
 191                 if (b->flags&BIO_FLAGS_UPLINK)
 192                         ret=UP_fwrite(in,(int)inl,1,b->ptr);
 193                 else
 194                         ret=fwrite(in,(int)inl,1,(FILE *)b->ptr);
 195                 if (ret)
 196                         ret=inl;
 197                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 198                 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
 199                  * out version above can cause 'inl' write calls under
 200                  * some stupid stdio implementations (VMS) */
 201                 }
 202         return(ret);
 203         }
 204
 205 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
 206         {
 207         long ret=1;
 208         FILE *fp=(FILE *)b->ptr;
 209         FILE **fpp;
 210         char p[4];
 211
 212         switch (cmd)
 213                 {
 214         case BIO_C_FILE_SEEK:
 215         case BIO_CTRL_RESET:
 216                 if (b->flags&BIO_FLAGS_UPLINK)
 217                         ret=(long)UP_fseek(b->ptr,num,0);
 218                 else
 219                         ret=(long)fseek(fp,num,0);
 220                 break;
 221         case BIO_CTRL_EOF:
 222                 if (b->flags&BIO_FLAGS_UPLINK)
 223                         ret=(long)UP_feof(fp);
 224                 else
 225                         ret=(long)feof(fp);
 226                 break;
 227         case BIO_C_FILE_TELL:
 228         case BIO_CTRL_INFO:
 229                 if (b->flags&BIO_FLAGS_UPLINK)
 230                         ret=UP_ftell(b->ptr);
 231                 else
 232                         ret=ftell(fp);
 233                 break;
 234         case BIO_C_SET_FILE_PTR:
 235                 file_free(b);
 236                 b->shutdown=(int)num&BIO_CLOSE;
 237                 b->ptr=ptr;
 238                 b->init=1;
 239 #if BIO_FLAGS_UPLINK!=0 && defined(_IOB_ENTRIES)
 240                 /* Safety net to catch purely internal BIO_set_fp calls */
 241                 if ((size_t)ptr >= (size_t)stdin &&
 242                     (size_t)ptr <  (size_t)(stdin+_IOB_ENTRIES))
 243                         BIO_clear_flags(b,BIO_FLAGS_UPLINK);
 244 #endif
 245 #ifdef UP_fsetmode
 246                 if (b->flags&BIO_FLAGS_UPLINK)
 247                         UP_fsetmode(b->ptr,num&BIO_FP_TEXT?'t':'b');
 248                 else
 249 #endif
 250                 {
 251 #if defined(OPENSSL_SYS_WINDOWS)
 252                 int fd = fileno((FILE*)ptr);
 253                 if (num & BIO_FP_TEXT)
 254                         _setmode(fd,_O_TEXT);
 255                 else
 256                         _setmode(fd,_O_BINARY);
 257 #elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
 258                 int fd = fileno((FILE*)ptr);
 259          /* Under CLib there are differences in file modes
 260          */
 261                 if (num & BIO_FP_TEXT)
 262                         _setmode(fd,O_TEXT);
 263                 else
 264                         _setmode(fd,O_BINARY);
 265 #elif defined(OPENSSL_SYS_MSDOS)
 266                 int fd = fileno((FILE*)ptr);
 267                 /* Set correct text/binary mode */
 268                 if (num & BIO_FP_TEXT)
 269                         _setmode(fd,_O_TEXT);
 270                 /* Dangerous to set stdin/stdout to raw (unless redirected) */
 271                 else
 272                         {
 273                         if (fd == STDIN_FILENO || fd == STDOUT_FILENO)
 274                                 {
 275                                 if (isatty(fd) <= 0)
 276                                         _setmode(fd,_O_BINARY);
 277                                 }
 278                         else
 279                                 _setmode(fd,_O_BINARY);
 280                         }
 281 #elif defined(OPENSSL_SYS_OS2)
 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 #endif
 288                 }
 289                 break;
 290         case BIO_C_SET_FILENAME:
 291                 file_free(b);
 292                 b->shutdown=(int)num&BIO_CLOSE;
 293                 if (num & BIO_FP_APPEND)
 294                         {
 295                         if (num & BIO_FP_READ)
 296                                 BUF_strlcpy(p,"a+",sizeof p);
 297                         else    BUF_strlcpy(p,"a",sizeof p);
 298                         }
 299                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 300                         BUF_strlcpy(p,"r+",sizeof p);
 301                 else if (num & BIO_FP_WRITE)
 302                         BUF_strlcpy(p,"w",sizeof p);
 303                 else if (num & BIO_FP_READ)
 304                         BUF_strlcpy(p,"r",sizeof p);
 305                 else
 306                         {
 307                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 308                         ret=0;
 309                         break;
 310                         }
 311 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
 312                 if (!(num & BIO_FP_TEXT))
 313                         strcat(p,"b");
 314                 else
 315                         strcat(p,"t");
 316 #endif
 317 #if defined(OPENSSL_SYS_NETWARE)
 318                 if (!(num & BIO_FP_TEXT))
 319                         strcat(p,"b");
 320                 else
 321                         strcat(p,"t");
 322 #endif
 323                 fp=fopen(ptr,p);
 324                 if (fp == NULL)
 325                         {
 326                         SYSerr(SYS_F_FOPEN,get_last_sys_error());
 327                         ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
 328                         BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
 329                         ret=0;
 330                         break;
 331                         }
 332                 b->ptr=fp;
 333                 b->init=1;
 334                 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
 335                 break;
 336         case BIO_C_GET_FILE_PTR:
 337                 /* the ptr parameter is actually a FILE ** in this case. */
 338                 if (ptr != NULL)
 339                         {
 340                         fpp=(FILE **)ptr;
 341                         *fpp=(FILE *)b->ptr;
 342                         }
 343                 break;
 344         case BIO_CTRL_GET_CLOSE:
 345                 ret=(long)b->shutdown;
 346                 break;
 347         case BIO_CTRL_SET_CLOSE:
 348                 b->shutdown=(int)num;
 349                 break;
 350         case BIO_CTRL_FLUSH:
 351                 if (b->flags&BIO_FLAGS_UPLINK)
 352                         UP_fflush(b->ptr);
 353                 else
 354                         fflush((FILE *)b->ptr);
 355                 break;
 356         case BIO_CTRL_DUP:
 357                 ret=1;
 358                 break;
 359
 360         case BIO_CTRL_WPENDING:
 361         case BIO_CTRL_PENDING:
 362         case BIO_CTRL_PUSH:
 363         case BIO_CTRL_POP:
 364         default:
 365                 ret=0;
 366                 break;
 367                 }
 368         return(ret);
 369         }
 370
 371 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
 372         {
 373         int ret=0;
 374
 375         buf[0]='\0';
 376         fgets(buf,size,(FILE *)bp->ptr);
 377         if (buf[0] != '\0')
 378                 ret=strlen(buf);
 379         return(ret);
 380         }
 381
 382 static int MS_CALLBACK file_puts(BIO *bp, const char *str)
 383         {
 384         int n,ret;
 385
 386         n=strlen(str);
 387         ret=file_write(bp,str,n);
 388         return(ret);
 389         }
 390
 391 #endif /* OPENSSL_NO_STDIO */
 392
 393 #endif /* HEADER_BSS_FILE_C */
 394
 395