bss_file.c revision 296465
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/* 70 * Following definition aliases fopen to fopen64 on above mentioned 71 * platforms. This makes it possible to open and sequentially access files 72 * larger than 2GB from 32-bit application. It does not allow to traverse 73 * them beyond 2GB with fseek/ftell, but on the other hand *no* 32-bit 74 * platform permits that, not with fseek/ftell. Not to mention that breaking 75 * 2GB limit for seeking would require surgery to *our* API. But sequential 76 * access suffices for practical cases when you can run into large files, 77 * such as fingerprinting, so we can let API alone. For reference, the list 78 * of 32-bit platforms which allow for sequential access of large files 79 * without extra "magic" comprise *BSD, 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 BIO_TYPE_FILE, 107 "FILE pointer", 108 file_write, 109 file_read, 110 file_puts, 111 file_gets, 112 file_ctrl, 113 file_new, 114 file_free, 115 NULL, 116}; 117 118BIO *BIO_new_file(const char *filename, const char *mode) 119{ 120 BIO *ret; 121 FILE *file; 122 123 if ((file = fopen(filename, mode)) == NULL) { 124 SYSerr(SYS_F_FOPEN, get_last_sys_error()); 125 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')"); 126 if (errno == ENOENT) 127 BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE); 128 else 129 BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB); 130 return (NULL); 131 } 132 if ((ret = BIO_new(BIO_s_file_internal())) == NULL) { 133 fclose(file); 134 return (NULL); 135 } 136 137 BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage 138 * UPLINK */ 139 BIO_set_fp(ret, file, BIO_CLOSE); 140 return (ret); 141} 142 143BIO *BIO_new_fp(FILE *stream, int close_flag) 144{ 145 BIO *ret; 146 147 if ((ret = BIO_new(BIO_s_file())) == NULL) 148 return (NULL); 149 150 BIO_set_flags(ret, BIO_FLAGS_UPLINK); /* redundant, left for 151 * documentation puposes */ 152 BIO_set_fp(ret, stream, close_flag); 153 return (ret); 154} 155 156BIO_METHOD *BIO_s_file(void) 157{ 158 return (&methods_filep); 159} 160 161static int MS_CALLBACK file_new(BIO *bi) 162{ 163 bi->init = 0; 164 bi->num = 0; 165 bi->ptr = NULL; 166 bi->flags = BIO_FLAGS_UPLINK; /* default to UPLINK */ 167 return (1); 168} 169 170static int MS_CALLBACK file_free(BIO *a) 171{ 172 if (a == NULL) 173 return (0); 174 if (a->shutdown) { 175 if ((a->init) && (a->ptr != NULL)) { 176 if (a->flags & BIO_FLAGS_UPLINK) 177 UP_fclose(a->ptr); 178 else 179 fclose(a->ptr); 180 a->ptr = NULL; 181 a->flags = BIO_FLAGS_UPLINK; 182 } 183 a->init = 0; 184 } 185 return (1); 186} 187 188static int MS_CALLBACK file_read(BIO *b, char *out, int outl) 189{ 190 int ret = 0; 191 192 if (b->init && (out != NULL)) { 193 if (b->flags & BIO_FLAGS_UPLINK) 194 ret = UP_fread(out, 1, (int)outl, b->ptr); 195 else 196 ret = fread(out, 1, (int)outl, (FILE *)b->ptr); 197 if (ret == 0 198 && (b->flags & BIO_FLAGS_UPLINK) ? UP_ferror((FILE *)b->ptr) : 199 ferror((FILE *)b->ptr)) { 200 SYSerr(SYS_F_FREAD, get_last_sys_error()); 201 BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB); 202 ret = -1; 203 } 204 } 205 return (ret); 206} 207 208static int MS_CALLBACK file_write(BIO *b, const char *in, int inl) 209{ 210 int ret = 0; 211 212 if (b->init && (in != NULL)) { 213 if (b->flags & BIO_FLAGS_UPLINK) 214 ret = UP_fwrite(in, (int)inl, 1, b->ptr); 215 else 216 ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr); 217 if (ret) 218 ret = inl; 219 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */ 220 /* 221 * according to Tim Hudson <tjh@cryptsoft.com>, the commented out 222 * version above can cause 'inl' write calls under some stupid stdio 223 * implementations (VMS) 224 */ 225 } 226 return (ret); 227} 228 229static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr) 230{ 231 long ret = 1; 232 FILE *fp = (FILE *)b->ptr; 233 FILE **fpp; 234 char p[4]; 235 236 switch (cmd) { 237 case BIO_C_FILE_SEEK: 238 case BIO_CTRL_RESET: 239 if (b->flags & BIO_FLAGS_UPLINK) 240 ret = (long)UP_fseek(b->ptr, num, 0); 241 else 242 ret = (long)fseek(fp, num, 0); 243 break; 244 case BIO_CTRL_EOF: 245 if (b->flags & BIO_FLAGS_UPLINK) 246 ret = (long)UP_feof(fp); 247 else 248 ret = (long)feof(fp); 249 break; 250 case BIO_C_FILE_TELL: 251 case BIO_CTRL_INFO: 252 if (b->flags & BIO_FLAGS_UPLINK) 253 ret = UP_ftell(b->ptr); 254 else 255 ret = ftell(fp); 256 break; 257 case BIO_C_SET_FILE_PTR: 258 file_free(b); 259 b->shutdown = (int)num & BIO_CLOSE; 260 b->ptr = ptr; 261 b->init = 1; 262# if BIO_FLAGS_UPLINK!=0 263# if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES) 264# define _IOB_ENTRIES 20 265# endif 266# if defined(_IOB_ENTRIES) 267 /* Safety net to catch purely internal BIO_set_fp calls */ 268 if ((size_t)ptr >= (size_t)stdin && 269 (size_t)ptr < (size_t)(stdin + _IOB_ENTRIES)) 270 BIO_clear_flags(b, BIO_FLAGS_UPLINK); 271# endif 272# endif 273# ifdef UP_fsetmod 274 if (b->flags & BIO_FLAGS_UPLINK) 275 UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b')); 276 else 277# endif 278 { 279# if defined(OPENSSL_SYS_WINDOWS) 280 int fd = _fileno((FILE *)ptr); 281 if (num & BIO_FP_TEXT) 282 _setmode(fd, _O_TEXT); 283 else 284 _setmode(fd, _O_BINARY); 285# elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB) 286 int fd = fileno((FILE *)ptr); 287 /* 288 * Under CLib there are differences in file modes 289 */ 290 if (num & BIO_FP_TEXT) 291 setmode(fd, O_TEXT); 292 else 293 setmode(fd, O_BINARY); 294# elif defined(OPENSSL_SYS_MSDOS) 295 int fd = fileno((FILE *)ptr); 296 /* Set correct text/binary mode */ 297 if (num & BIO_FP_TEXT) 298 _setmode(fd, _O_TEXT); 299 /* Dangerous to set stdin/stdout to raw (unless redirected) */ 300 else { 301 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) { 302 if (isatty(fd) <= 0) 303 _setmode(fd, _O_BINARY); 304 } else 305 _setmode(fd, _O_BINARY); 306 } 307# elif defined(OPENSSL_SYS_OS2) 308 int fd = fileno((FILE *)ptr); 309 if (num & BIO_FP_TEXT) 310 setmode(fd, O_TEXT); 311 else 312 setmode(fd, O_BINARY); 313# endif 314 } 315 break; 316 case BIO_C_SET_FILENAME: 317 file_free(b); 318 b->shutdown = (int)num & BIO_CLOSE; 319 if (num & BIO_FP_APPEND) { 320 if (num & BIO_FP_READ) 321 BUF_strlcpy(p, "a+", sizeof p); 322 else 323 BUF_strlcpy(p, "a", sizeof p); 324 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) 325 BUF_strlcpy(p, "r+", sizeof p); 326 else if (num & BIO_FP_WRITE) 327 BUF_strlcpy(p, "w", sizeof p); 328 else if (num & BIO_FP_READ) 329 BUF_strlcpy(p, "r", sizeof p); 330 else { 331 BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE); 332 ret = 0; 333 break; 334 } 335# if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN) 336 if (!(num & BIO_FP_TEXT)) 337 strcat(p, "b"); 338 else 339 strcat(p, "t"); 340# endif 341# if defined(OPENSSL_SYS_NETWARE) 342 if (!(num & BIO_FP_TEXT)) 343 strcat(p, "b"); 344 else 345 strcat(p, "t"); 346# endif 347 fp = fopen(ptr, p); 348 if (fp == NULL) { 349 SYSerr(SYS_F_FOPEN, get_last_sys_error()); 350 ERR_add_error_data(5, "fopen('", ptr, "','", p, "')"); 351 BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB); 352 ret = 0; 353 break; 354 } 355 b->ptr = fp; 356 b->init = 1; 357 BIO_clear_flags(b, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage 358 * UPLINK */ 359 break; 360 case BIO_C_GET_FILE_PTR: 361 /* the ptr parameter is actually a FILE ** in this case. */ 362 if (ptr != NULL) { 363 fpp = (FILE **)ptr; 364 *fpp = (FILE *)b->ptr; 365 } 366 break; 367 case BIO_CTRL_GET_CLOSE: 368 ret = (long)b->shutdown; 369 break; 370 case BIO_CTRL_SET_CLOSE: 371 b->shutdown = (int)num; 372 break; 373 case BIO_CTRL_FLUSH: 374 if (b->flags & BIO_FLAGS_UPLINK) 375 UP_fflush(b->ptr); 376 else 377 fflush((FILE *)b->ptr); 378 break; 379 case BIO_CTRL_DUP: 380 ret = 1; 381 break; 382 383 case BIO_CTRL_WPENDING: 384 case BIO_CTRL_PENDING: 385 case BIO_CTRL_PUSH: 386 case BIO_CTRL_POP: 387 default: 388 ret = 0; 389 break; 390 } 391 return (ret); 392} 393 394static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size) 395{ 396 int ret = 0; 397 398 buf[0] = '\0'; 399 if (bp->flags & BIO_FLAGS_UPLINK) { 400 if (!UP_fgets(buf, size, bp->ptr)) 401 goto err; 402 } else { 403 if (!fgets(buf, size, (FILE *)bp->ptr)) 404 goto err; 405 } 406 if (buf[0] != '\0') 407 ret = strlen(buf); 408 err: 409 return (ret); 410} 411 412static int MS_CALLBACK file_puts(BIO *bp, const char *str) 413{ 414 int n, ret; 415 416 n = strlen(str); 417 ret = file_write(bp, str, n); 418 return (ret); 419} 420 421# endif /* OPENSSL_NO_STDIO */ 422 423#endif /* HEADER_BSS_FILE_C */ 424