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.h"
  72 #include "err.h"
  73
  74 #if !defined(NO_STDIO)
  75
  76 #ifndef NOPROTO
  77 static int MS_CALLBACK file_write(BIO *h,char *buf,int num);
  78 static int MS_CALLBACK file_read(BIO *h,char *buf,int size);
  79 static int MS_CALLBACK file_puts(BIO *h,char *str);
  80 static int MS_CALLBACK file_gets(BIO *h,char *str,int size);
  81 static long MS_CALLBACK file_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  82 static int MS_CALLBACK file_new(BIO *h);
  83 static int MS_CALLBACK file_free(BIO *data);
  84 #else
  85 static int MS_CALLBACK file_write();
  86 static int MS_CALLBACK file_read();
  87 static int MS_CALLBACK file_puts();
  88 static int MS_CALLBACK file_gets();
  89 static long MS_CALLBACK file_ctrl();
  90 static int MS_CALLBACK file_new();
  91 static int MS_CALLBACK file_free();
  92 #endif
  93
  94 static BIO_METHOD methods_filep=
  95         {
  96         BIO_TYPE_FILE,
  97         "FILE pointer",
  98         file_write,
  99         file_read,
 100         file_puts,
 101         file_gets,
 102         file_ctrl,
 103         file_new,
 104         file_free,
 105         };
 106
 107 BIO *BIO_new_file(filename,mode)
 108 char *filename;
 109 char *mode;
 110         {
 111         BIO *ret;
 112         FILE *file;
 113
 114         if ((file=fopen(filename,mode)) == NULL)
 115                 {
 116                 SYSerr(SYS_F_FOPEN,get_last_sys_error());
 117                 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
 118                 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
 119                 return(NULL);
 120                 }
 121         if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
 122                 return(NULL);
 123
 124         BIO_set_fp(ret,file,BIO_CLOSE);
 125         return(ret);
 126         }
 127
 128 BIO *BIO_new_fp(stream,close_flag)
 129 FILE *stream;
 130 int close_flag;
 131         {
 132         BIO *ret;
 133
 134         if ((ret=BIO_new(BIO_s_file())) == NULL)
 135                 return(NULL);
 136
 137         BIO_set_fp(ret,stream,close_flag);
 138         return(ret);
 139         }
 140
 141 BIO_METHOD *BIO_s_file()
 142         {
 143         return(&methods_filep);
 144         }
 145
 146 static int MS_CALLBACK file_new(bi)
 147 BIO *bi;
 148         {
 149         bi->init=0;
 150         bi->num=0;
 151         bi->ptr=NULL;
 152         return(1);
 153         }
 154
 155 static int MS_CALLBACK file_free(a)
 156 BIO *a;
 157         {
 158         if (a == NULL) return(0);
 159         if (a->shutdown)
 160                 {
 161                 if ((a->init) && (a->ptr != NULL))
 162                         {
 163                         fclose((FILE *)a->ptr);
 164                         a->ptr=NULL;
 165                         }
 166                 a->init=0;
 167                 }
 168         return(1);
 169         }
 170
 171 static int MS_CALLBACK file_read(b,out,outl)
 172 BIO *b;
 173 char *out;
 174 int outl;
 175         {
 176         int ret=0;
 177
 178         if (b->init && (out != NULL))
 179                 {
 180                 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 181                 }
 182         return(ret);
 183         }
 184
 185 static int MS_CALLBACK file_write(b,in,inl)
 186 BIO *b;
 187 char *in;
 188 int inl;
 189         {
 190         int ret=0;
 191
 192         if (b->init && (in != NULL))
 193                 {
 194                 if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
 195                         ret=inl;
 196                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 197                 /* acording to Tim Hudson <tjh@cryptsoft.com>, the commented
 198                  * out version above can cause 'inl' write calls under
 199                  * some stupid stdio implementations (VMS) */
 200                 }
 201         return(ret);
 202         }
 203
 204 static long MS_CALLBACK file_ctrl(b,cmd,num,ptr)
 205 BIO *b;
 206 int cmd;
 207 long num;
 208 char *ptr;
 209         {
 210         long ret=1;
 211         FILE *fp=(FILE *)b->ptr;
 212         FILE **fpp;
 213         char p[4];
 214
 215         switch (cmd)
 216                 {
 217         case BIO_CTRL_RESET:
 218                 ret=(long)fseek(fp,num,0);
 219                 break;
 220         case BIO_CTRL_EOF:
 221                 ret=(long)feof(fp);
 222                 break;
 223         case BIO_CTRL_INFO:
 224                 ret=ftell(fp);
 225                 break;
 226         case BIO_C_SET_FILE_PTR:
 227                 file_free(b);
 228                 b->shutdown=(int)num;
 229                 b->ptr=(char *)ptr;
 230                 b->init=1;
 231 #if defined(MSDOS) || defined(WINDOWS)
 232                 /* Set correct text/binary mode */
 233                 if (num & BIO_FP_TEXT)
 234                         _setmode(fileno((FILE *)ptr),_O_TEXT);
 235                 else
 236                         _setmode(fileno((FILE *)ptr),_O_BINARY);
 237 #endif
 238                 break;
 239         case BIO_C_SET_FILENAME:
 240                 file_free(b);
 241                 b->shutdown=(int)num&BIO_CLOSE;
 242                 if (num & BIO_FP_APPEND)
 243                         {
 244                         if (num & BIO_FP_READ)
 245                                 strcpy(p,"a+");
 246                         else    strcpy(p,"a");
 247                         }
 248                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 249                         strcpy(p,"r+");
 250                 else if (num & BIO_FP_WRITE)
 251                         strcpy(p,"w");
 252                 else if (num & BIO_FP_READ)
 253                         strcpy(p,"r");
 254                 else
 255                         {
 256                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 257                         ret=0;
 258                         break;
 259                         }
 260 #if defined(MSDOS) || defined(WINDOWS)
 261                 if (!(num & BIO_FP_TEXT))
 262                         strcat(p,"b");
 263                 else
 264                         strcat(p,"t");
 265 #endif
 266                 fp=fopen(ptr,p);
 267                 if (fp == NULL)
 268                         {
 269                         SYSerr(SYS_F_FOPEN,get_last_sys_error());
 270                         ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
 271                         BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
 272                         ret=0;
 273                         break;
 274                         }
 275                 b->ptr=(char *)fp;
 276                 b->init=1;
 277                 break;
 278         case BIO_C_GET_FILE_PTR:
 279                 /* the ptr parameter is actually a FILE ** in this case. */
 280                 if (ptr != NULL)
 281                         {
 282                         fpp=(FILE **)ptr;
 283                         *fpp=(FILE *)b->ptr;
 284                         }
 285                 break;
 286         case BIO_CTRL_GET_CLOSE:
 287                 ret=(long)b->shutdown;
 288                 break;
 289         case BIO_CTRL_SET_CLOSE:
 290                 b->shutdown=(int)num;
 291                 break;
 292         case BIO_CTRL_FLUSH:
 293                 fflush((FILE *)b->ptr);
 294                 break;
 295         case BIO_CTRL_DUP:
 296                 ret=1;
 297                 break;
 298
 299         case BIO_CTRL_WPENDING:
 300         case BIO_CTRL_PENDING:
 301         case BIO_CTRL_PUSH:
 302         case BIO_CTRL_POP:
 303         default:
 304                 ret=0;
 305                 break;
 306                 }
 307         return(ret);
 308         }
 309
 310 static int MS_CALLBACK file_gets(bp,buf,size)
 311 BIO *bp;
 312 char *buf;
 313 int size;
 314         {
 315         int ret=0;
 316
 317         buf[0]='\0';
 318         fgets(buf,size,(FILE *)bp->ptr);
 319         if (buf[0] != '\0')
 320                 ret=strlen(buf);
 321         return(ret);
 322         }
 323
 324 static int MS_CALLBACK file_puts(bp,str)
 325 BIO *bp;
 326 char *str;
 327         {
 328         int n,ret;
 329
 330         n=strlen(str);
 331         ret=file_write(bp,str,n);
 332         return(ret);
 333         }
 334
 335 #endif /* NO_STDIO */
 336
 337 #endif /* HEADER_BSS_FILE_C */
 338
 339