bss_file.c revision 98d58bb80c64b02a33662f0ea80351d4a1535267
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#if defined(__linux) || defined(__sun) || defined(__hpux) 69/* Following definition aliases fopen to fopen64 on above mentioned 70 * platforms. This makes it possible to open and sequentially access 71 * files larger than 2GB from 32-bit application. It does not allow to 72 * traverse them beyond 2GB with fseek/ftell, but on the other hand *no* 73 * 32-bit platform permits that, not with fseek/ftell. Not to mention 74 * that breaking 2GB limit for seeking would require surgery to *our* 75 * API. But sequential access suffices for practical cases when you 76 * can run into large files, such as fingerprinting, so we can let API 77 * alone. For reference, the list of 32-bit platforms which allow for 78 * sequential access of large files without extra "magic" comprise *BSD, 79 * Darwin, IRIX... 80 */ 81#ifndef _FILE_OFFSET_BITS 82#define _FILE_OFFSET_BITS 64 83#endif 84#endif 85 86#include <stdio.h> 87#include <errno.h> 88#include "cryptlib.h" 89#include "bio_lcl.h" 90#include <openssl/err.h> 91 92#if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB) 93#include <nwfileio.h> 94#endif 95 96#if !defined(OPENSSL_NO_STDIO) 97 98static int MS_CALLBACK file_write(BIO *h, const char *buf, int num); 99static int MS_CALLBACK file_read(BIO *h, char *buf, int size); 100static int MS_CALLBACK file_puts(BIO *h, const char *str); 101static int MS_CALLBACK file_gets(BIO *h, char *str, int size); 102static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2); 103static int MS_CALLBACK file_new(BIO *h); 104static int MS_CALLBACK file_free(BIO *data); 105static BIO_METHOD methods_filep= 106 { 107 BIO_TYPE_FILE, 108 "FILE pointer", 109 file_write, 110 file_read, 111 file_puts, 112 file_gets, 113 file_ctrl, 114 file_new, 115 file_free, 116 NULL, 117 }; 118 119BIO *BIO_new_file(const char *filename, const char *mode) 120 { 121 BIO *ret; 122 FILE *file; 123 124 if ((file=fopen(filename,mode)) == NULL) 125 { 126 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 127 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')"); 128 if (errno == ENOENT) 129 BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE); 130 else 131 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB); 132 return(NULL); 133 } 134 if ((ret=BIO_new(BIO_s_file_internal())) == NULL) 135 { 136 fclose(file); 137 return(NULL); 138 } 139 140 BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ 141 BIO_set_fp(ret,file,BIO_CLOSE); 142 return(ret); 143 } 144 145BIO *BIO_new_fp(FILE *stream, int close_flag) 146 { 147 BIO *ret; 148 149 if ((ret=BIO_new(BIO_s_file())) == NULL) 150 return(NULL); 151 152 BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */ 153 BIO_set_fp(ret,stream,close_flag); 154 return(ret); 155 } 156 157BIO_METHOD *BIO_s_file(void) 158 { 159 return(&methods_filep); 160 } 161 162static int MS_CALLBACK file_new(BIO *bi) 163 { 164 bi->init=0; 165 bi->num=0; 166 bi->ptr=NULL; 167 bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */ 168 return(1); 169 } 170 171static int MS_CALLBACK file_free(BIO *a) 172 { 173 if (a == NULL) return(0); 174 if (a->shutdown) 175 { 176 if ((a->init) && (a->ptr != NULL)) 177 { 178 if (a->flags&BIO_FLAGS_UPLINK) 179 UP_fclose (a->ptr); 180 else 181 fclose (a->ptr); 182 a->ptr=NULL; 183 a->flags=BIO_FLAGS_UPLINK; 184 } 185 a->init=0; 186 } 187 return(1); 188 } 189 190static int MS_CALLBACK file_read(BIO *b, char *out, int outl) 191 { 192 int ret=0; 193 194 if (b->init && (out != NULL)) 195 { 196 if (b->flags&BIO_FLAGS_UPLINK) 197 ret=UP_fread(out,1,(int)outl,b->ptr); 198 else 199 ret=fread(out,1,(int)outl,(FILE *)b->ptr); 200 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr)) 201 { 202 SYSerr(SYS_F_FREAD,get_last_sys_error()); 203 BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB); 204 ret=-1; 205 } 206 } 207 return(ret); 208 } 209 210static int MS_CALLBACK file_write(BIO *b, const char *in, int inl) 211 { 212 int ret=0; 213 214 if (b->init && (in != NULL)) 215 { 216 if (b->flags&BIO_FLAGS_UPLINK) 217 ret=UP_fwrite(in,(int)inl,1,b->ptr); 218 else 219 ret=fwrite(in,(int)inl,1,(FILE *)b->ptr); 220 if (ret) 221 ret=inl; 222 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */ 223 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented 224 * out version above can cause 'inl' write calls under 225 * some stupid stdio implementations (VMS) */ 226 } 227 return(ret); 228 } 229 230static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr) 231 { 232 long ret=1; 233 FILE *fp=(FILE *)b->ptr; 234 FILE **fpp; 235 char p[4]; 236 237 switch (cmd) 238 { 239 case BIO_C_FILE_SEEK: 240 case BIO_CTRL_RESET: 241 if (b->flags&BIO_FLAGS_UPLINK) 242 ret=(long)UP_fseek(b->ptr,num,0); 243 else 244 ret=(long)fseek(fp,num,0); 245 break; 246 case BIO_CTRL_EOF: 247 if (b->flags&BIO_FLAGS_UPLINK) 248 ret=(long)UP_feof(fp); 249 else 250 ret=(long)feof(fp); 251 break; 252 case BIO_C_FILE_TELL: 253 case BIO_CTRL_INFO: 254 if (b->flags&BIO_FLAGS_UPLINK) 255 ret=UP_ftell(b->ptr); 256 else 257 ret=ftell(fp); 258 break; 259 case BIO_C_SET_FILE_PTR: 260 file_free(b); 261 b->shutdown=(int)num&BIO_CLOSE; 262 b->ptr=ptr; 263 b->init=1; 264#if BIO_FLAGS_UPLINK!=0 265#if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES) 266#define _IOB_ENTRIES 20 267#endif 268#if defined(_IOB_ENTRIES) 269 /* Safety net to catch purely internal BIO_set_fp calls */ 270 if ((size_t)ptr >= (size_t)stdin && 271 (size_t)ptr < (size_t)(stdin+_IOB_ENTRIES)) 272 BIO_clear_flags(b,BIO_FLAGS_UPLINK); 273#endif 274#endif 275#ifdef UP_fsetmode 276 if (b->flags&BIO_FLAGS_UPLINK) 277 UP_fsetmode(b->ptr,num&BIO_FP_TEXT?'t':'b'); 278 else 279#endif 280 { 281#if defined(OPENSSL_SYS_WINDOWS) 282 int fd = _fileno((FILE*)ptr); 283 if (num & BIO_FP_TEXT) 284 _setmode(fd,_O_TEXT); 285 else 286 _setmode(fd,_O_BINARY); 287#elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB) 288 int fd = fileno((FILE*)ptr); 289 /* Under CLib there are differences in file modes 290 */ 291 if (num & BIO_FP_TEXT) 292 setmode(fd,O_TEXT); 293 else 294 setmode(fd,O_BINARY); 295#elif defined(OPENSSL_SYS_MSDOS) 296 int fd = fileno((FILE*)ptr); 297 /* Set correct text/binary mode */ 298 if (num & BIO_FP_TEXT) 299 _setmode(fd,_O_TEXT); 300 /* Dangerous to set stdin/stdout to raw (unless redirected) */ 301 else 302 { 303 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) 304 { 305 if (isatty(fd) <= 0) 306 _setmode(fd,_O_BINARY); 307 } 308 else 309 _setmode(fd,_O_BINARY); 310 } 311#elif defined(OPENSSL_SYS_OS2) 312 int fd = fileno((FILE*)ptr); 313 if (num & BIO_FP_TEXT) 314 setmode(fd, O_TEXT); 315 else 316 setmode(fd, O_BINARY); 317#endif 318 } 319 break; 320 case BIO_C_SET_FILENAME: 321 file_free(b); 322 b->shutdown=(int)num&BIO_CLOSE; 323 if (num & BIO_FP_APPEND) 324 { 325 if (num & BIO_FP_READ) 326 BUF_strlcpy(p,"a+",sizeof p); 327 else BUF_strlcpy(p,"a",sizeof p); 328 } 329 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 330 BUF_strlcpy(p,"r+",sizeof p); 331 else if (num & BIO_FP_WRITE) 332 BUF_strlcpy(p,"w",sizeof p); 333 else if (num & BIO_FP_READ) 334 BUF_strlcpy(p,"r",sizeof p); 335 else 336 { 337 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE); 338 ret=0; 339 break; 340 } 341#if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN) 342 if (!(num & BIO_FP_TEXT)) 343 strcat(p,"b"); 344 else 345 strcat(p,"t"); 346#endif 347#if defined(OPENSSL_SYS_NETWARE) 348 if (!(num & BIO_FP_TEXT)) 349 strcat(p,"b"); 350 else 351 strcat(p,"t"); 352#endif 353 fp=fopen(ptr,p); 354 if (fp == NULL) 355 { 356 SYSerr(SYS_F_FOPEN,get_last_sys_error()); 357 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')"); 358 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB); 359 ret=0; 360 break; 361 } 362 b->ptr=fp; 363 b->init=1; 364 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */ 365 break; 366 case BIO_C_GET_FILE_PTR: 367 /* the ptr parameter is actually a FILE ** in this case. */ 368 if (ptr != NULL) 369 { 370 fpp=(FILE **)ptr; 371 *fpp=(FILE *)b->ptr; 372 } 373 break; 374 case BIO_CTRL_GET_CLOSE: 375 ret=(long)b->shutdown; 376 break; 377 case BIO_CTRL_SET_CLOSE: 378 b->shutdown=(int)num; 379 break; 380 case BIO_CTRL_FLUSH: 381 if (b->flags&BIO_FLAGS_UPLINK) 382 UP_fflush(b->ptr); 383 else 384 fflush((FILE *)b->ptr); 385 break; 386 case BIO_CTRL_DUP: 387 ret=1; 388 break; 389 390 case BIO_CTRL_WPENDING: 391 case BIO_CTRL_PENDING: 392 case BIO_CTRL_PUSH: 393 case BIO_CTRL_POP: 394 default: 395 ret=0; 396 break; 397 } 398 return(ret); 399 } 400 401static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size) 402 { 403 int ret=0; 404 405 buf[0]='\0'; 406 if (bp->flags&BIO_FLAGS_UPLINK) 407 { 408 if (!UP_fgets(buf,size,bp->ptr)) 409 goto err; 410 } 411 else 412 { 413 if (!fgets(buf,size,(FILE *)bp->ptr)) 414 goto err; 415 } 416 if (buf[0] != '\0') 417 ret=strlen(buf); 418 err: 419 return(ret); 420 } 421 422static int MS_CALLBACK file_puts(BIO *bp, const char *str) 423 { 424 int n,ret; 425 426 n=strlen(str); 427 ret=file_write(bp,str,n); 428 return(ret); 429 } 430 431#endif /* OPENSSL_NO_STDIO */ 432 433#endif /* HEADER_BSS_FILE_C */ 434 435 436