2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * 03-Dec-1997 rdenny@dc3.com Fix bug preventing use of stdin/stdout
12 * with binary data (e.g. asn1parse -inform DER < xxx) under
16 #ifndef HEADER_BSS_FILE_C
17 # define HEADER_BSS_FILE_C
19 # if defined(__linux) || defined(__sun) || defined(__hpux)
21 * Following definition aliases fopen to fopen64 on above mentioned
22 * platforms. This makes it possible to open and sequentially access files
23 * larger than 2GB from 32-bit application. It does not allow to traverse
24 * them beyond 2GB with fseek/ftell, but on the other hand *no* 32-bit
25 * platform permits that, not with fseek/ftell. Not to mention that breaking
26 * 2GB limit for seeking would require surgery to *our* API. But sequential
27 * access suffices for practical cases when you can run into large files,
28 * such as fingerprinting, so we can let API alone. For reference, the list
29 * of 32-bit platforms which allow for sequential access of large files
30 * without extra "magic" comprise *BSD, Darwin, IRIX...
32 # ifndef _FILE_OFFSET_BITS
33 # define _FILE_OFFSET_BITS 64
40 # include <openssl/err.h>
42 # if !defined(OPENSSL_NO_STDIO)
44 static int file_write(BIO *h, const char *buf, int num);
45 static int file_read(BIO *h, char *buf, int size);
46 static int file_puts(BIO *h, const char *str);
47 static int file_gets(BIO *h, char *str, int size);
48 static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
49 static int file_new(BIO *h);
50 static int file_free(BIO *data);
51 static const BIO_METHOD methods_filep = {
55 /* TODO: Convert to new style read function */
66 BIO *BIO_new_file(const char *filename, const char *mode)
69 FILE *file = openssl_fopen(filename, mode);
70 int fp_flags = BIO_CLOSE;
72 if (strchr(mode, 'b') == NULL)
73 fp_flags |= BIO_FP_TEXT;
76 SYSerr(SYS_F_FOPEN, get_last_sys_error());
77 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
83 BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE);
85 BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB);
88 if ((ret = BIO_new(BIO_s_file())) == NULL) {
93 BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
95 BIO_set_fp(ret, file, fp_flags);
99 BIO *BIO_new_fp(FILE *stream, int close_flag)
103 if ((ret = BIO_new(BIO_s_file())) == NULL)
106 /* redundant flag, left for documentation purposes */
107 BIO_set_flags(ret, BIO_FLAGS_UPLINK);
108 BIO_set_fp(ret, stream, close_flag);
112 const BIO_METHOD *BIO_s_file(void)
114 return (&methods_filep);
117 static int file_new(BIO *bi)
122 bi->flags = BIO_FLAGS_UPLINK; /* default to UPLINK */
126 static int file_free(BIO *a)
131 if ((a->init) && (a->ptr != NULL)) {
132 if (a->flags & BIO_FLAGS_UPLINK)
137 a->flags = BIO_FLAGS_UPLINK;
144 static int file_read(BIO *b, char *out, int outl)
148 if (b->init && (out != NULL)) {
149 if (b->flags & BIO_FLAGS_UPLINK)
150 ret = UP_fread(out, 1, (int)outl, b->ptr);
152 ret = fread(out, 1, (int)outl, (FILE *)b->ptr);
154 && (b->flags & BIO_FLAGS_UPLINK) ? UP_ferror((FILE *)b->ptr) :
155 ferror((FILE *)b->ptr)) {
156 SYSerr(SYS_F_FREAD, get_last_sys_error());
157 BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB);
164 static int file_write(BIO *b, const char *in, int inl)
168 if (b->init && (in != NULL)) {
169 if (b->flags & BIO_FLAGS_UPLINK)
170 ret = UP_fwrite(in, (int)inl, 1, b->ptr);
172 ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr);
175 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
177 * according to Tim Hudson <tjh@cryptsoft.com>, the commented out
178 * version above can cause 'inl' write calls under some stupid stdio
179 * implementations (VMS)
185 static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
188 FILE *fp = (FILE *)b->ptr;
193 case BIO_C_FILE_SEEK:
195 if (b->flags & BIO_FLAGS_UPLINK)
196 ret = (long)UP_fseek(b->ptr, num, 0);
198 ret = (long)fseek(fp, num, 0);
201 if (b->flags & BIO_FLAGS_UPLINK)
202 ret = (long)UP_feof(fp);
204 ret = (long)feof(fp);
206 case BIO_C_FILE_TELL:
208 if (b->flags & BIO_FLAGS_UPLINK)
209 ret = UP_ftell(b->ptr);
213 case BIO_C_SET_FILE_PTR:
215 b->shutdown = (int)num & BIO_CLOSE;
218 # if BIO_FLAGS_UPLINK!=0
219 # if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
220 # define _IOB_ENTRIES 20
222 /* Safety net to catch purely internal BIO_set_fp calls */
223 # if defined(_MSC_VER) && _MSC_VER>=1900
224 if (ptr == stdin || ptr == stdout || ptr == stderr)
225 BIO_clear_flags(b, BIO_FLAGS_UPLINK);
226 # elif defined(_IOB_ENTRIES)
227 if ((size_t)ptr >= (size_t)stdin &&
228 (size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
229 BIO_clear_flags(b, BIO_FLAGS_UPLINK);
233 if (b->flags & BIO_FLAGS_UPLINK)
234 UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
238 # if defined(OPENSSL_SYS_WINDOWS)
239 int fd = _fileno((FILE *)ptr);
240 if (num & BIO_FP_TEXT)
241 _setmode(fd, _O_TEXT);
243 _setmode(fd, _O_BINARY);
244 # elif defined(OPENSSL_SYS_MSDOS)
245 int fd = fileno((FILE *)ptr);
246 /* Set correct text/binary mode */
247 if (num & BIO_FP_TEXT)
248 _setmode(fd, _O_TEXT);
249 /* Dangerous to set stdin/stdout to raw (unless redirected) */
251 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) {
253 _setmode(fd, _O_BINARY);
255 _setmode(fd, _O_BINARY);
257 # elif defined(OPENSSL_SYS_WIN32_CYGWIN)
258 int fd = fileno((FILE *)ptr);
259 if (num & BIO_FP_TEXT)
262 setmode(fd, O_BINARY);
266 case BIO_C_SET_FILENAME:
268 b->shutdown = (int)num & BIO_CLOSE;
269 if (num & BIO_FP_APPEND) {
270 if (num & BIO_FP_READ)
271 OPENSSL_strlcpy(p, "a+", sizeof p);
273 OPENSSL_strlcpy(p, "a", sizeof p);
274 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
275 OPENSSL_strlcpy(p, "r+", sizeof p);
276 else if (num & BIO_FP_WRITE)
277 OPENSSL_strlcpy(p, "w", sizeof p);
278 else if (num & BIO_FP_READ)
279 OPENSSL_strlcpy(p, "r", sizeof p);
281 BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
285 # if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32_CYGWIN)
286 if (!(num & BIO_FP_TEXT))
291 fp = openssl_fopen(ptr, p);
293 SYSerr(SYS_F_FOPEN, get_last_sys_error());
294 ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
295 BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
301 BIO_clear_flags(b, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
304 case BIO_C_GET_FILE_PTR:
305 /* the ptr parameter is actually a FILE ** in this case. */
308 *fpp = (FILE *)b->ptr;
311 case BIO_CTRL_GET_CLOSE:
312 ret = (long)b->shutdown;
314 case BIO_CTRL_SET_CLOSE:
315 b->shutdown = (int)num;
318 if (b->flags & BIO_FLAGS_UPLINK)
321 fflush((FILE *)b->ptr);
327 case BIO_CTRL_WPENDING:
328 case BIO_CTRL_PENDING:
338 static int file_gets(BIO *bp, char *buf, int size)
343 if (bp->flags & BIO_FLAGS_UPLINK) {
344 if (!UP_fgets(buf, size, bp->ptr))
347 if (!fgets(buf, size, (FILE *)bp->ptr))
356 static int file_puts(BIO *bp, const char *str)
361 ret = file_write(bp, str, n);
367 static int file_write(BIO *b, const char *in, int inl)
371 static int file_read(BIO *b, char *out, int outl)
375 static int file_puts(BIO *bp, const char *str)
379 static int file_gets(BIO *bp, char *buf, int size)
383 static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
387 static int file_new(BIO *bi)
391 static int file_free(BIO *a)
396 static const BIO_METHOD methods_filep = {
409 const BIO_METHOD *BIO_s_file(void)
411 return (&methods_filep);
414 BIO *BIO_new_file(const char *filename, const char *mode)
419 # endif /* OPENSSL_NO_STDIO */
421 #endif /* HEADER_BSS_FILE_C */