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 = {
61 NULL, /* file_callback_ctrl */
64 BIO *BIO_new_file(const char *filename, const char *mode)
67 FILE *file = openssl_fopen(filename, mode);
68 int fp_flags = BIO_CLOSE;
70 if (strchr(mode, 'b') == NULL)
71 fp_flags |= BIO_FP_TEXT;
74 SYSerr(SYS_F_FOPEN, get_last_sys_error());
75 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
81 BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE);
83 BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB);
86 if ((ret = BIO_new(BIO_s_file())) == NULL) {
91 BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
93 BIO_set_fp(ret, file, fp_flags);
97 BIO *BIO_new_fp(FILE *stream, int close_flag)
101 if ((ret = BIO_new(BIO_s_file())) == NULL)
104 /* redundant flag, left for documentation purposes */
105 BIO_set_flags(ret, BIO_FLAGS_UPLINK);
106 BIO_set_fp(ret, stream, close_flag);
110 const BIO_METHOD *BIO_s_file(void)
112 return (&methods_filep);
115 static int file_new(BIO *bi)
120 bi->flags = BIO_FLAGS_UPLINK; /* default to UPLINK */
124 static int file_free(BIO *a)
129 if ((a->init) && (a->ptr != NULL)) {
130 if (a->flags & BIO_FLAGS_UPLINK)
135 a->flags = BIO_FLAGS_UPLINK;
142 static int file_read(BIO *b, char *out, int outl)
146 if (b->init && (out != NULL)) {
147 if (b->flags & BIO_FLAGS_UPLINK)
148 ret = UP_fread(out, 1, (int)outl, b->ptr);
150 ret = fread(out, 1, (int)outl, (FILE *)b->ptr);
152 && (b->flags & BIO_FLAGS_UPLINK) ? UP_ferror((FILE *)b->ptr) :
153 ferror((FILE *)b->ptr)) {
154 SYSerr(SYS_F_FREAD, get_last_sys_error());
155 BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB);
162 static int file_write(BIO *b, const char *in, int inl)
166 if (b->init && (in != NULL)) {
167 if (b->flags & BIO_FLAGS_UPLINK)
168 ret = UP_fwrite(in, (int)inl, 1, b->ptr);
170 ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr);
173 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
175 * according to Tim Hudson <tjh@cryptsoft.com>, the commented out
176 * version above can cause 'inl' write calls under some stupid stdio
177 * implementations (VMS)
183 static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
186 FILE *fp = (FILE *)b->ptr;
192 case BIO_C_FILE_SEEK:
194 if (b->flags & BIO_FLAGS_UPLINK)
195 ret = (long)UP_fseek(b->ptr, num, 0);
197 ret = (long)fseek(fp, num, 0);
200 if (b->flags & BIO_FLAGS_UPLINK)
201 ret = (long)UP_feof(fp);
203 ret = (long)feof(fp);
205 case BIO_C_FILE_TELL:
207 if (b->flags & BIO_FLAGS_UPLINK)
208 ret = UP_ftell(b->ptr);
212 case BIO_C_SET_FILE_PTR:
214 b->shutdown = (int)num & BIO_CLOSE;
217 # if BIO_FLAGS_UPLINK!=0
218 # if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
219 # define _IOB_ENTRIES 20
221 /* Safety net to catch purely internal BIO_set_fp calls */
222 # if defined(_MSC_VER) && _MSC_VER>=1900
223 if (ptr == stdin || ptr == stdout || ptr == stderr)
224 BIO_clear_flags(b, BIO_FLAGS_UPLINK);
225 # elif defined(_IOB_ENTRIES)
226 if ((size_t)ptr >= (size_t)stdin &&
227 (size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
228 BIO_clear_flags(b, BIO_FLAGS_UPLINK);
232 if (b->flags & BIO_FLAGS_UPLINK)
233 UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
237 # if defined(OPENSSL_SYS_WINDOWS)
238 int fd = _fileno((FILE *)ptr);
239 if (num & BIO_FP_TEXT)
240 _setmode(fd, _O_TEXT);
242 _setmode(fd, _O_BINARY);
243 # elif defined(OPENSSL_SYS_MSDOS)
244 int fd = fileno((FILE *)ptr);
245 /* Set correct text/binary mode */
246 if (num & BIO_FP_TEXT)
247 _setmode(fd, _O_TEXT);
248 /* Dangerous to set stdin/stdout to raw (unless redirected) */
250 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) {
252 _setmode(fd, _O_BINARY);
254 _setmode(fd, _O_BINARY);
256 # elif defined(OPENSSL_SYS_WIN32_CYGWIN)
257 int fd = fileno((FILE *)ptr);
258 if (!(num & BIO_FP_TEXT))
259 setmode(fd, O_BINARY);
263 case BIO_C_SET_FILENAME:
265 b->shutdown = (int)num & BIO_CLOSE;
266 if (num & BIO_FP_APPEND) {
267 if (num & BIO_FP_READ)
268 OPENSSL_strlcpy(p, "a+", sizeof(p));
270 OPENSSL_strlcpy(p, "a", sizeof(p));
271 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
272 OPENSSL_strlcpy(p, "r+", sizeof(p));
273 else if (num & BIO_FP_WRITE)
274 OPENSSL_strlcpy(p, "w", sizeof(p));
275 else if (num & BIO_FP_READ)
276 OPENSSL_strlcpy(p, "r", sizeof(p));
278 BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
282 # if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS)
283 if (!(num & BIO_FP_TEXT))
287 # elif defined(OPENSSL_SYS_WIN32_CYGWIN)
288 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 st = b->flags & BIO_FLAGS_UPLINK
319 ? UP_fflush(b->ptr) : fflush((FILE *)b->ptr);
321 SYSerr(SYS_F_FFLUSH, get_last_sys_error());
322 ERR_add_error_data(1, "fflush()");
323 BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
331 case BIO_CTRL_WPENDING:
332 case BIO_CTRL_PENDING:
342 static int file_gets(BIO *bp, char *buf, int size)
347 if (bp->flags & BIO_FLAGS_UPLINK) {
348 if (!UP_fgets(buf, size, bp->ptr))
351 if (!fgets(buf, size, (FILE *)bp->ptr))
360 static int file_puts(BIO *bp, const char *str)
365 ret = file_write(bp, str, n);
371 static int file_write(BIO *b, const char *in, int inl)
375 static int file_read(BIO *b, char *out, int outl)
379 static int file_puts(BIO *bp, const char *str)
383 static int file_gets(BIO *bp, char *buf, int size)
387 static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
391 static int file_new(BIO *bi)
395 static int file_free(BIO *a)
400 static const BIO_METHOD methods_filep = {
410 NULL, /* file_callback_ctrl */
413 const BIO_METHOD *BIO_s_file(void)
415 return (&methods_filep);
418 BIO *BIO_new_file(const char *filename, const char *mode)
423 # endif /* OPENSSL_NO_STDIO */
425 #endif /* HEADER_BSS_FILE_C */