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                 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
 107                 return(NULL);
 108                 }
 109         if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
 110                 return(NULL);
 111
 112         BIO_set_fp(ret,file,BIO_CLOSE);
 113         return(ret);
 114         }
 115
 116 BIO *BIO_new_fp(FILE *stream, int close_flag)
 117         {
 118         BIO *ret;
 119
 120         if ((ret=BIO_new(BIO_s_file())) == NULL)
 121                 return(NULL);
 122
 123         BIO_set_fp(ret,stream,close_flag);
 124         return(ret);
 125         }
 126
 127 BIO_METHOD *BIO_s_file(void)
 128         {
 129         return(&methods_filep);
 130         }
 131
 132 static int MS_CALLBACK file_new(BIO *bi)
 133         {
 134         bi->init=0;
 135         bi->num=0;
 136         bi->ptr=NULL;
 137         return(1);
 138         }
 139
 140 static int MS_CALLBACK file_free(BIO *a)
 141         {
 142         if (a == NULL) return(0);
 143         if (a->shutdown)
 144                 {
 145                 if ((a->init) && (a->ptr != NULL))
 146                         {
 147                         fclose((FILE *)a->ptr);
 148                         a->ptr=NULL;
 149                         }
 150                 a->init=0;
 151                 }
 152         return(1);
 153         }
 154
 155 static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
 156         {
 157         int ret=0;
 158
 159         if (b->init && (out != NULL))
 160                 {
 161                 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 162                 }
 163         return(ret);
 164         }
 165
 166 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
 167         {
 168         int ret=0;
 169
 170         if (b->init && (in != NULL))
 171                 {
 172                 if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
 173                         ret=inl;
 174                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 175                 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
 176                  * out version above can cause 'inl' write calls under
 177                  * some stupid stdio implementations (VMS) */
 178                 }
 179         return(ret);
 180         }
 181
 182 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
 183         {
 184         long ret=1;
 185         FILE *fp=(FILE *)b->ptr;
 186         FILE **fpp;
 187         char p[4];
 188
 189         switch (cmd)
 190                 {
 191         case BIO_C_FILE_SEEK:
 192         case BIO_CTRL_RESET:
 193                 ret=(long)fseek(fp,num,0);
 194                 break;
 195         case BIO_CTRL_EOF:
 196                 ret=(long)feof(fp);
 197                 break;
 198         case BIO_C_FILE_TELL:
 199         case BIO_CTRL_INFO:
 200                 ret=ftell(fp);
 201                 break;
 202         case BIO_C_SET_FILE_PTR:
 203                 file_free(b);
 204                 b->shutdown=(int)num&BIO_CLOSE;
 205                 b->ptr=(char *)ptr;
 206                 b->init=1;
 207 #if defined(MSDOS) || defined(WINDOWS)
 208                 /* Set correct text/binary mode */
 209                 if (num & BIO_FP_TEXT)
 210                         _setmode(fileno((FILE *)ptr),_O_TEXT);
 211                 else
 212                         _setmode(fileno((FILE *)ptr),_O_BINARY);
 213 #endif
 214                 break;
 215         case BIO_C_SET_FILENAME:
 216                 file_free(b);
 217                 b->shutdown=(int)num&BIO_CLOSE;
 218                 if (num & BIO_FP_APPEND)
 219                         {
 220                         if (num & BIO_FP_READ)
 221                                 strcpy(p,"a+");
 222                         else    strcpy(p,"a");
 223                         }
 224                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 225                         strcpy(p,"r+");
 226                 else if (num & BIO_FP_WRITE)
 227                         strcpy(p,"w");
 228                 else if (num & BIO_FP_READ)
 229                         strcpy(p,"r");
 230                 else
 231                         {
 232                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 233                         ret=0;
 234                         break;
 235                         }
 236 #if defined(MSDOS) || defined(WINDOWS)
 237                 if (!(num & BIO_FP_TEXT))
 238                         strcat(p,"b");
 239                 else
 240                         strcat(p,"t");
 241 #endif
 242                 fp=fopen(ptr,p);
 243                 if (fp == NULL)
 244                         {
 245                         SYSerr(SYS_F_FOPEN,get_last_sys_error());
 246                         ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
 247                         BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
 248                         ret=0;
 249                         break;
 250                         }
 251                 b->ptr=(char *)fp;
 252                 b->init=1;
 253                 break;
 254         case BIO_C_GET_FILE_PTR:
 255                 /* the ptr parameter is actually a FILE ** in this case. */
 256                 if (ptr != NULL)
 257                         {
 258                         fpp=(FILE **)ptr;
 259                         *fpp=(FILE *)b->ptr;
 260                         }
 261                 break;
 262         case BIO_CTRL_GET_CLOSE:
 263                 ret=(long)b->shutdown;
 264                 break;
 265         case BIO_CTRL_SET_CLOSE:
 266                 b->shutdown=(int)num;
 267                 break;
 268         case BIO_CTRL_FLUSH:
 269                 fflush((FILE *)b->ptr);
 270                 break;
 271         case BIO_CTRL_DUP:
 272                 ret=1;
 273                 break;
 274
 275         case BIO_CTRL_WPENDING:
 276         case BIO_CTRL_PENDING:
 277         case BIO_CTRL_PUSH:
 278         case BIO_CTRL_POP:
 279         default:
 280                 ret=0;
 281                 break;
 282                 }
 283         return(ret);
 284         }
 285
 286 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
 287         {
 288         int ret=0;
 289
 290         buf[0]='\0';
 291         fgets(buf,size,(FILE *)bp->ptr);
 292         if (buf[0] != '\0')
 293                 ret=strlen(buf);
 294         return(ret);
 295         }
 296
 297 static int MS_CALLBACK file_puts(BIO *bp, const char *str)
 298         {
 299         int n,ret;
 300
 301         n=strlen(str);
 302         ret=file_write(bp,str,n);
 303         return(ret);
 304         }
 305
 306 #endif /* OPENSSL_NO_STDIO */
 307
 308 #endif /* HEADER_BSS_FILE_C */
 309
 310