AppleCSP/open_ssl/bio/bss_file.c

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 /* crypto/bio/bss_file.c */
  20 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  21  * All rights reserved.
  22  *
  23  * This package is an SSL implementation written
  24  * by Eric Young (eay@cryptsoft.com).
  25  * The implementation was written so as to conform with Netscapes SSL.
  26  *
  27  * This library is free for commercial and non-commercial use as long as
  28  * the following conditions are aheared to.  The following conditions
  29  * apply to all code found in this distribution, be it the RC4, RSA,
  30  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  31  * included with this distribution is covered by the same copyright terms
  32  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  33  *
  34  * Copyright remains Eric Young's, and as such any Copyright notices in
  35  * the code are not to be removed.
  36  * If this package is used in a product, Eric Young should be given attribution
  37  * as the author of the parts of the library used.
  38  * This can be in the form of a textual message at program startup or
  39  * in documentation (online or textual) provided with the package.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *    "This product includes cryptographic software written by
  52  *     Eric Young (eay@cryptsoft.com)"
  53  *    The word 'cryptographic' can be left out if the rouines from the library
  54  *    being used are not cryptographic related :-).
  55  * 4. If you include any Windows specific code (or a derivative thereof) from
  56  *    the apps directory (application code) you must include an acknowledgement:
  57  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  * The licence and distribution terms for any publically available version or
  72  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  73  * copied and put under another distribution licence
  74  * [including the GNU Public Licence.]
  75  */
  76
  77 /*
  78  * 03-Dec-1997  rdenny@dc3.com  Fix bug preventing use of stdin/stdout
  79  *              with binary data (e.g. asn1parse -inform DER < xxx) under
  80  *              Windows
  81  */
  82
  83 #ifndef HEADER_BSS_FILE_C
  84 #define HEADER_BSS_FILE_C
  85
  86 #include <stdio.h>
  87 #include <errno.h>
  88 #include "cryptlib.h"
  89 #include <openssl/bio.h>
  90 #include <openssl/err.h>
  91
  92 #if !defined(NO_STDIO)
  93
  94 static int MS_CALLBACK file_write(BIO *h,char *buf,int num);
  95 static int MS_CALLBACK file_read(BIO *h,char *buf,int size);
  96 static int MS_CALLBACK file_puts(BIO *h,char *str);
  97 static int MS_CALLBACK file_gets(BIO *h,char *str,int size);
  98 static long MS_CALLBACK file_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  99 static int MS_CALLBACK file_new(BIO *h);
 100 static int MS_CALLBACK file_free(BIO *data);
 101 static const BIO_METHOD methods_filep=
 102         {
 103         BIO_TYPE_FILE,
 104         "FILE pointer",
 105         file_write,
 106         file_read,
 107         file_puts,
 108         file_gets,
 109         file_ctrl,
 110         file_new,
 111         file_free,
 112         NULL,
 113         };
 114
 115 BIO *BIO_new_file(const char *filename, const char *mode)
 116         {
 117         BIO *ret;
 118         FILE *file;
 119
 120         if ((file=fopen(filename,mode)) == NULL)
 121                 {
 122                 SYSerr(SYS_F_FOPEN,get_last_sys_error());
 123                 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
 124                 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
 125                 return(NULL);
 126                 }
 127         if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
 128                 return(NULL);
 129
 130         BIO_set_fp(ret,file,BIO_CLOSE);
 131         return(ret);
 132         }
 133
 134 BIO *BIO_new_fp(FILE *stream, int close_flag)
 135         {
 136         BIO *ret;
 137
 138         if ((ret=BIO_new(BIO_s_file())) == NULL)
 139                 return(NULL);
 140
 141         BIO_set_fp(ret,stream,close_flag);
 142         return(ret);
 143         }
 144
 145 const BIO_METHOD *BIO_s_file(void)
 146         {
 147         return(&methods_filep);
 148         }
 149
 150 static int MS_CALLBACK file_new(BIO *bi)
 151         {
 152         bi->init=0;
 153         bi->num=0;
 154         bi->ptr=NULL;
 155         return(1);
 156         }
 157
 158 static int MS_CALLBACK file_free(BIO *a)
 159         {
 160         if (a == NULL) return(0);
 161         if (a->shutdown)
 162                 {
 163                 if ((a->init) && (a->ptr != NULL))
 164                         {
 165                         fclose((FILE *)a->ptr);
 166                         a->ptr=NULL;
 167                         }
 168                 a->init=0;
 169                 }
 170         return(1);
 171         }
 172
 173 static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
 174         {
 175         int ret=0;
 176
 177         if (b->init && (out != NULL))
 178                 {
 179                 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
 180                 }
 181         return(ret);
 182         }
 183
 184 static int MS_CALLBACK file_write(BIO *b, char *in, int inl)
 185         {
 186         int ret=0;
 187
 188         if (b->init && (in != NULL))
 189                 {
 190                 if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
 191                         ret=inl;
 192                 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
 193                 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
 194                  * out version above can cause 'inl' write calls under
 195                  * some stupid stdio implementations (VMS) */
 196                 }
 197         return(ret);
 198         }
 199
 200 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, char *ptr)
 201         {
 202         long ret=1;
 203         FILE *fp=(FILE *)b->ptr;
 204         FILE **fpp;
 205         char p[4];
 206
 207         switch (cmd)
 208                 {
 209         case BIO_C_FILE_SEEK:
 210         case BIO_CTRL_RESET:
 211                 ret=(long)fseek(fp,num,0);
 212                 break;
 213         case BIO_CTRL_EOF:
 214                 ret=(long)feof(fp);
 215                 break;
 216         case BIO_C_FILE_TELL:
 217         case BIO_CTRL_INFO:
 218                 ret=ftell(fp);
 219                 break;
 220         case BIO_C_SET_FILE_PTR:
 221                 file_free(b);
 222                 b->shutdown=(int)num&BIO_CLOSE;
 223                 b->ptr=(char *)ptr;
 224                 b->init=1;
 225 #if defined(MSDOS) || defined(WINDOWS)
 226                 /* Set correct text/binary mode */
 227                 if (num & BIO_FP_TEXT)
 228                         _setmode(fileno((FILE *)ptr),_O_TEXT);
 229                 else
 230                         _setmode(fileno((FILE *)ptr),_O_BINARY);
 231 #endif
 232                 break;
 233         case BIO_C_SET_FILENAME:
 234                 file_free(b);
 235                 b->shutdown=(int)num&BIO_CLOSE;
 236                 if (num & BIO_FP_APPEND)
 237                         {
 238                         if (num & BIO_FP_READ)
 239                                 strcpy(p,"a+");
 240                         else    strcpy(p,"a");
 241                         }
 242                 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
 243                         strcpy(p,"r+");
 244                 else if (num & BIO_FP_WRITE)
 245                         strcpy(p,"w");
 246                 else if (num & BIO_FP_READ)
 247                         strcpy(p,"r");
 248                 else
 249                         {
 250                         BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
 251                         ret=0;
 252                         break;
 253                         }
 254 #if defined(MSDOS) || defined(WINDOWS)
 255                 if (!(num & BIO_FP_TEXT))
 256                         strcat(p,"b");
 257                 else
 258                         strcat(p,"t");
 259 #endif
 260                 fp=fopen(ptr,p);
 261                 if (fp == NULL)
 262                         {
 263                         SYSerr(SYS_F_FOPEN,get_last_sys_error());
 264                         ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
 265                         BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
 266                         ret=0;
 267                         break;
 268                         }
 269                 b->ptr=(char *)fp;
 270                 b->init=1;
 271                 break;
 272         case BIO_C_GET_FILE_PTR:
 273                 /* the ptr parameter is actually a FILE ** in this case. */
 274                 if (ptr != NULL)
 275                         {
 276                         fpp=(FILE **)ptr;
 277                         *fpp=(FILE *)b->ptr;
 278                         }
 279                 break;
 280         case BIO_CTRL_GET_CLOSE:
 281                 ret=(long)b->shutdown;
 282                 break;
 283         case BIO_CTRL_SET_CLOSE:
 284                 b->shutdown=(int)num;
 285                 break;
 286         case BIO_CTRL_FLUSH:
 287                 fflush((FILE *)b->ptr);
 288                 break;
 289         case BIO_CTRL_DUP:
 290                 ret=1;
 291                 break;
 292
 293         case BIO_CTRL_WPENDING:
 294         case BIO_CTRL_PENDING:
 295         case BIO_CTRL_PUSH:
 296         case BIO_CTRL_POP:
 297         default:
 298                 ret=0;
 299                 break;
 300                 }
 301         return(ret);
 302         }
 303
 304 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
 305         {
 306         int ret=0;
 307
 308         buf[0]='\0';
 309         fgets(buf,size,(FILE *)bp->ptr);
 310         if (buf[0] != '\0')
 311                 ret=strlen(buf);
 312         return(ret);
 313         }
 314
 315 static int MS_CALLBACK file_puts(BIO *bp, char *str)
 316         {
 317         int n,ret;
 318
 319         n=strlen(str);
 320         ret=file_write(bp,str,n);
 321         return(ret);
 322         }
 323
 324 #endif /* NO_STDIO */
 325
 326 #endif /* HEADER_BSS_FILE_C */
 327
 328