crypto/bio/bss_file.c

   1 /* crypto/bio/bss_file.c */
   2 /* Copyright (C) 1995-1997 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 #include <stdio.h>
  60 #include <errno.h>
  61 #include "cryptlib.h"
  62 #include "bio.h"
  63 #include "err.h"
  64
  65 #ifndef NOPROTO
  66 static int MS_CALLBACK file_write(BIO *h,char *buf,int num);
  67 static int MS_CALLBACK file_read(BIO *h,char *buf,int size);
  68 static int MS_CALLBACK file_puts(BIO *h,char *str);
  69 static int MS_CALLBACK file_gets(BIO *h,char *str,int size);
  70 static long MS_CALLBACK file_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  71 static int MS_CALLBACK file_new(BIO *h);
  72 static int MS_CALLBACK file_free(BIO *data);
  73 #else
  74 static int MS_CALLBACK file_write();
  75 static int MS_CALLBACK file_read();
  76 static int MS_CALLBACK file_puts();
  77 static int MS_CALLBACK file_gets();
  78 static long MS_CALLBACK file_ctrl();
  79 static int MS_CALLBACK file_new();
  80 static int MS_CALLBACK file_free();
  81 #endif
  82
  83 static BIO_METHOD methods_filep=
  84         {
  85         BIO_TYPE_FILE,"FILE pointer",
  86         file_write,
  87         file_read,
  88         file_puts,
  89         file_gets,
  90         file_ctrl,
  91         file_new,
  92         file_free,
  93         };
  94
  95 #if !defined(WIN16) || defined(APPS_WIN16)
  96 BIO *BIO_new_file(filename,mode)
  97 char *filename;
  98 char *mode;
  99         {
 100         BIO *ret;
 101         FILE *file;
 102
 103         if ((file=fopen(filename,mode)) == NULL)
 104                 {
 105                 SYSerr(SYS_F_FOPEN,errno);
 106                 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
 107                 return(NULL);
 108                 }
 109
 110         if ((ret=BIO_new(BIO_s_file())) == NULL)
 111                 return(NULL);
 112 #if 0
 113         if ((ret=BIO_new(BIO_s_file_internal_w16())) == NULL)
 114                 return(NULL);
 115 #endif
 116
 117         BIO_set_fp(ret,file,BIO_CLOSE);
 118         return(ret);
 119         }
 120
 121 BIO *BIO_new_fp(stream,close_flag)
 122 FILE *stream;
 123 int close_flag;
 124         {
 125         BIO *ret;
 126
 127         if ((ret=BIO_new(BIO_s_file())) == NULL)
 128                 return(NULL);
 129 #if 0
 130         if ((ret=BIO_new(BIO_s_file_internal_w16())) == NULL)
 131 #endif
 132
 133         BIO_set_fp(ret,stream,close_flag);
 134         return(ret);
 135         }
 136 #endif /* !APPS_WIN16 */
 137
 138 #if !defined(WIN16) || defined(APPS_WIN16)
 139
 140 BIO_METHOD *BIO_s_file()
 141         {
 142         return(&methods_filep);
 143         }
 144
 145 #else
 146
 147 BIO_METHOD *BIO_s_file_internal_w16()
 148         {
 149         return(&methods_filep);
 150         }
 151
 152 #endif
 153
 154 static int MS_CALLBACK file_new(bi)
 155 BIO *bi;
 156         {
 157         bi->init=0;
 158         bi->num=0;
 159         bi->ptr=NULL;
 160         return(1);
 161         }
 162
 163 static int MS_CALLBACK file_free(a)
 164 BIO *a;
 165         {
 166         if (a == NULL) return(0);
 167         if (a->shutdown)
 168                 {
 169                 if ((a->init) && (a->ptr != NULL))
 170                         {
 171                         fclose((FILE *)a->ptr);
 172                         a->ptr=NULL;
 173                         }
 174                 a->init=0;
 175                 }
 176         return(1);
 177         }
 178
 179 static int MS_CALLBACK file_read(b,out,outl)
 180 BIO *b;
 181 char *out;
 182 int outl;
 183         {
 184         int ret=0;
 185
 186         if (b->init && (out != NULL))
 187                 {
 188                 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 189                 }
 190         return(ret);
 191         }
 192
 193 static int MS_CALLBACK file_write(b,in,inl)
 194 BIO *b;
 195 char *in;
 196 int inl;
 197         {
 198         int ret=0;
 199
 200         if (b->init && (in != NULL))
 201                 {
 202                 if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
 203                         ret=inl;
 204                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 205                 /* acording to Tim Hudson <tjh@cryptsoft.com>, the commented
 206                  * out version above can cause 'inl' write calls under
 207                  * some stupid stdio implementations (VMS) */
 208                 }
 209         return(ret);
 210         }
 211
 212 static long MS_CALLBACK file_ctrl(b,cmd,num,ptr)
 213 BIO *b;
 214 int cmd;
 215 long num;
 216 char *ptr;
 217         {
 218         long ret=1;
 219         FILE *fp=(FILE *)b->ptr;
 220         FILE **fpp;
 221         char p[4];
 222
 223         switch (cmd)
 224                 {
 225         case BIO_CTRL_RESET:
 226                 ret=(long)fseek(fp,num,0);
 227                 break;
 228         case BIO_CTRL_EOF:
 229                 ret=(long)feof(fp);
 230                 break;
 231         case BIO_CTRL_INFO:
 232                 ret=ftell(fp);
 233                 break;
 234         case BIO_C_SET_FILE_PTR:
 235                 file_free(b);
 236                 b->shutdown=(int)num;
 237                 b->ptr=(char *)ptr;
 238                 b->init=1;
 239                 break;
 240         case BIO_C_SET_FILENAME:
 241                 file_free(b);
 242                 b->shutdown=(int)num&BIO_CLOSE;
 243                 if (num & BIO_FP_APPEND)
 244                         {
 245                         if (num & BIO_FP_READ)
 246                                 strcpy(p,"a+");
 247                         else    strcpy(p,"a");
 248                         }
 249                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 250                         strcpy(p,"r+");
 251                 else if (num & BIO_FP_WRITE)
 252                         strcpy(p,"w");
 253                 else if (num & BIO_FP_READ)
 254                         strcpy(p,"r");
 255                 else
 256                         {
 257                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 258                         ret=0;
 259                         break;
 260                         }
 261 #if defined(MSDOS) || defined(WINDOWS)
 262                 if (!(num & BIO_FP_TEXT))
 263                         strcat(p,"b");
 264                 else
 265                         strcat(p,"t");
 266 #endif
 267                 fp=fopen(ptr,p);
 268                 if (fp == NULL)
 269                         {
 270                         SYSerr(SYS_F_FOPEN,errno);
 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