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 <openssl/bio.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_set_fp(ret,file,BIO_CLOSE);
 116         return(ret);
 117         }
 118
 119 BIO *BIO_new_fp(FILE *stream, int close_flag)
 120         {
 121         BIO *ret;
 122
 123         if ((ret=BIO_new(BIO_s_file())) == NULL)
 124                 return(NULL);
 125
 126         BIO_set_fp(ret,stream,close_flag);
 127         return(ret);
 128         }
 129
 130 BIO_METHOD *BIO_s_file(void)
 131         {
 132         return(&methods_filep);
 133         }
 134
 135 static int MS_CALLBACK file_new(BIO *bi)
 136         {
 137         bi->init=0;
 138         bi->num=0;
 139         bi->ptr=NULL;
 140         return(1);
 141         }
 142
 143 static int MS_CALLBACK file_free(BIO *a)
 144         {
 145         if (a == NULL) return(0);
 146         if (a->shutdown)
 147                 {
 148                 if ((a->init) && (a->ptr != NULL))
 149                         {
 150                         fclose((FILE *)a->ptr);
 151                         a->ptr=NULL;
 152                         }
 153                 a->init=0;
 154                 }
 155         return(1);
 156         }
 157
 158 static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
 159         {
 160         int ret=0;
 161
 162         if (b->init && (out != NULL))
 163                 {
 164                 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 165                 }
 166         return(ret);
 167         }
 168
 169 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
 170         {
 171         int ret=0;
 172
 173         if (b->init && (in != NULL))
 174                 {
 175                 if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
 176                         ret=inl;
 177                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 178                 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
 179                  * out version above can cause 'inl' write calls under
 180                  * some stupid stdio implementations (VMS) */
 181                 }
 182         return(ret);
 183         }
 184
 185 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
 186         {
 187         long ret=1;
 188         FILE *fp=(FILE *)b->ptr;
 189         FILE **fpp;
 190         char p[4];
 191
 192         switch (cmd)
 193                 {
 194         case BIO_C_FILE_SEEK:
 195         case BIO_CTRL_RESET:
 196                 ret=(long)fseek(fp,num,0);
 197                 break;
 198         case BIO_CTRL_EOF:
 199                 ret=(long)feof(fp);
 200                 break;
 201         case BIO_C_FILE_TELL:
 202         case BIO_CTRL_INFO:
 203                 ret=ftell(fp);
 204                 break;
 205         case BIO_C_SET_FILE_PTR:
 206                 file_free(b);
 207                 b->shutdown=(int)num&BIO_CLOSE;
 208                 b->ptr=(char *)ptr;
 209                 b->init=1;
 210 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS)
 211                 /* Set correct text/binary mode */
 212                 if (num & BIO_FP_TEXT)
 213                         _setmode(fileno((FILE *)ptr),_O_TEXT);
 214                 else
 215                         _setmode(fileno((FILE *)ptr),_O_BINARY);
 216 #elif defined(OPENSSL_SYS_OS2)
 217                 if (num & BIO_FP_TEXT)
 218                         setmode(fileno((FILE *)ptr), O_TEXT);
 219                 else
 220                         setmode(fileno((FILE *)ptr), O_BINARY);
 221 #endif
 222                 break;
 223         case BIO_C_SET_FILENAME:
 224                 file_free(b);
 225                 b->shutdown=(int)num&BIO_CLOSE;
 226                 if (num & BIO_FP_APPEND)
 227                         {
 228                         if (num & BIO_FP_READ)
 229                                 strcpy(p,"a+");
 230                         else    strcpy(p,"a");
 231                         }
 232                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 233                         strcpy(p,"r+");
 234                 else if (num & BIO_FP_WRITE)
 235                         strcpy(p,"w");
 236                 else if (num & BIO_FP_READ)
 237                         strcpy(p,"r");
 238                 else
 239                         {
 240                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 241                         ret=0;
 242                         break;
 243                         }
 244 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS)
 245                 if (!(num & BIO_FP_TEXT))
 246                         strcat(p,"b");
 247                 else
 248                         strcat(p,"t");
 249 #endif
 250                 fp=fopen(ptr,p);
 251                 if (fp == NULL)
 252                         {
 253                         SYSerr(SYS_F_FOPEN,get_last_sys_error());
 254                         ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
 255                         BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
 256                         ret=0;
 257                         break;
 258                         }
 259                 b->ptr=(char *)fp;
 260                 b->init=1;
 261                 break;
 262         case BIO_C_GET_FILE_PTR:
 263                 /* the ptr parameter is actually a FILE ** in this case. */
 264                 if (ptr != NULL)
 265                         {
 266                         fpp=(FILE **)ptr;
 267                         *fpp=(FILE *)b->ptr;
 268                         }
 269                 break;
 270         case BIO_CTRL_GET_CLOSE:
 271                 ret=(long)b->shutdown;
 272                 break;
 273         case BIO_CTRL_SET_CLOSE:
 274                 b->shutdown=(int)num;
 275                 break;
 276         case BIO_CTRL_FLUSH:
 277                 fflush((FILE *)b->ptr);
 278                 break;
 279         case BIO_CTRL_DUP:
 280                 ret=1;
 281                 break;
 282
 283         case BIO_CTRL_WPENDING:
 284         case BIO_CTRL_PENDING:
 285         case BIO_CTRL_PUSH:
 286         case BIO_CTRL_POP:
 287         default:
 288                 ret=0;
 289                 break;
 290                 }
 291         return(ret);
 292         }
 293
 294 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
 295         {
 296         int ret=0;
 297
 298         buf[0]='\0';
 299         fgets(buf,size,(FILE *)bp->ptr);
 300         if (buf[0] != '\0')
 301                 ret=strlen(buf);
 302         return(ret);
 303         }
 304
 305 static int MS_CALLBACK file_puts(BIO *bp, const char *str)
 306         {
 307         int n,ret;
 308
 309         n=strlen(str);
 310         ret=file_write(bp,str,n);
 311         return(ret);
 312         }
 313
 314 #endif /* OPENSSL_NO_STDIO */
 315
 316 #endif /* HEADER_BSS_FILE_C */
 317
 318