2 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
10 #if defined(__linux) || defined(__sun) || defined(__hpux)
12 * Following definition aliases fopen to fopen64 on above mentioned
13 * platforms. This makes it possible to open and sequentially access files
14 * larger than 2GB from 32-bit application. It does not allow to traverse
15 * them beyond 2GB with fseek/ftell, but on the other hand *no* 32-bit
16 * platform permits that, not with fseek/ftell. Not to mention that breaking
17 * 2GB limit for seeking would require surgery to *our* API. But sequential
18 * access suffices for practical cases when you can run into large files,
19 * such as fingerprinting, so we can let API alone. For reference, the list
20 * of 32-bit platforms which allow for sequential access of large files
21 * without extra "magic" comprise *BSD, Darwin, IRIX...
23 # ifndef _FILE_OFFSET_BITS
24 # define _FILE_OFFSET_BITS 64
31 #include <openssl/err.h>
33 #if !defined(OPENSSL_NO_STDIO)
35 static int file_write(BIO *h, const char *buf, int num);
36 static int file_read(BIO *h, char *buf, int size);
37 static int file_puts(BIO *h, const char *str);
38 static int file_gets(BIO *h, char *str, int size);
39 static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
40 static int file_new(BIO *h);
41 static int file_free(BIO *data);
42 static const BIO_METHOD methods_filep = {
45 /* TODO: Convert to new style write function */
48 /* TODO: Convert to new style read function */
56 NULL, /* file_callback_ctrl */
59 BIO *BIO_new_file(const char *filename, const char *mode)
62 FILE *file = openssl_fopen(filename, mode);
63 int fp_flags = BIO_CLOSE;
65 if (strchr(mode, 'b') == NULL)
66 fp_flags |= BIO_FP_TEXT;
69 FUNCerr("fopen", get_last_sys_error());
70 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
76 BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE);
78 BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB);
81 if ((ret = BIO_new(BIO_s_file())) == NULL) {
86 /* we did fopen -> we disengage UPLINK */
87 BIO_clear_flags(ret, BIO_FLAGS_UPLINK_INTERNAL);
88 BIO_set_fp(ret, file, fp_flags);
92 BIO *BIO_new_fp(FILE *stream, int close_flag)
96 if ((ret = BIO_new(BIO_s_file())) == NULL)
99 /* redundant flag, left for documentation purposes */
100 BIO_set_flags(ret, BIO_FLAGS_UPLINK_INTERNAL);
101 BIO_set_fp(ret, stream, close_flag);
105 const BIO_METHOD *BIO_s_file(void)
107 return &methods_filep;
110 static int file_new(BIO *bi)
115 bi->flags = BIO_FLAGS_UPLINK_INTERNAL; /* default to UPLINK */
119 static int file_free(BIO *a)
124 if ((a->init) && (a->ptr != NULL)) {
125 if (a->flags & BIO_FLAGS_UPLINK_INTERNAL)
130 a->flags = BIO_FLAGS_UPLINK_INTERNAL;
137 static int file_read(BIO *b, char *out, int outl)
141 if (b->init && (out != NULL)) {
142 if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
143 ret = UP_fread(out, 1, (int)outl, b->ptr);
145 ret = fread(out, 1, (int)outl, (FILE *)b->ptr);
147 && (b->flags & BIO_FLAGS_UPLINK_INTERNAL
148 ? UP_ferror((FILE *)b->ptr) : ferror((FILE *)b->ptr))) {
149 FUNCerr("fread", get_last_sys_error());
150 BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB);
157 static int file_write(BIO *b, const char *in, int inl)
161 if (b->init && (in != NULL)) {
162 if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
163 ret = UP_fwrite(in, (int)inl, 1, b->ptr);
165 ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr);
168 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
170 * according to Tim Hudson <tjh@openssl.org>, the commented out
171 * version above can cause 'inl' write calls under some stupid stdio
172 * implementations (VMS)
178 static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
181 FILE *fp = (FILE *)b->ptr;
187 case BIO_C_FILE_SEEK:
189 if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
190 ret = (long)UP_fseek(b->ptr, num, 0);
192 ret = (long)fseek(fp, num, 0);
195 if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
196 ret = (long)UP_feof(fp);
198 ret = (long)feof(fp);
200 case BIO_C_FILE_TELL:
202 if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
203 ret = UP_ftell(b->ptr);
207 case BIO_C_SET_FILE_PTR:
209 b->shutdown = (int)num & BIO_CLOSE;
212 # if BIO_FLAGS_UPLINK_INTERNAL!=0
213 # if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
214 # define _IOB_ENTRIES 20
216 /* Safety net to catch purely internal BIO_set_fp calls */
217 # if defined(_MSC_VER) && _MSC_VER>=1900
218 if (ptr == stdin || ptr == stdout || ptr == stderr)
219 BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
220 # elif defined(_IOB_ENTRIES)
221 if ((size_t)ptr >= (size_t)stdin &&
222 (size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
223 BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
227 if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
228 UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
232 # if defined(OPENSSL_SYS_WINDOWS)
233 int fd = _fileno((FILE *)ptr);
234 if (num & BIO_FP_TEXT)
235 _setmode(fd, _O_TEXT);
237 _setmode(fd, _O_BINARY);
238 # elif defined(OPENSSL_SYS_MSDOS)
239 int fd = fileno((FILE *)ptr);
240 /* Set correct text/binary mode */
241 if (num & BIO_FP_TEXT)
242 _setmode(fd, _O_TEXT);
243 /* Dangerous to set stdin/stdout to raw (unless redirected) */
245 if (fd == STDIN_FILENO || fd == STDOUT_FILENO) {
247 _setmode(fd, _O_BINARY);
249 _setmode(fd, _O_BINARY);
251 # elif defined(OPENSSL_SYS_WIN32_CYGWIN)
252 int fd = fileno((FILE *)ptr);
253 if (!(num & BIO_FP_TEXT))
254 setmode(fd, O_BINARY);
258 case BIO_C_SET_FILENAME:
260 b->shutdown = (int)num & BIO_CLOSE;
261 if (num & BIO_FP_APPEND) {
262 if (num & BIO_FP_READ)
263 OPENSSL_strlcpy(p, "a+", sizeof(p));
265 OPENSSL_strlcpy(p, "a", sizeof(p));
266 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
267 OPENSSL_strlcpy(p, "r+", sizeof(p));
268 else if (num & BIO_FP_WRITE)
269 OPENSSL_strlcpy(p, "w", sizeof(p));
270 else if (num & BIO_FP_READ)
271 OPENSSL_strlcpy(p, "r", sizeof(p));
273 BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
277 # if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS)
278 if (!(num & BIO_FP_TEXT))
279 OPENSSL_strlcat(p, "b", sizeof(p));
281 OPENSSL_strlcat(p, "t", sizeof(p));
282 # elif defined(OPENSSL_SYS_WIN32_CYGWIN)
283 if (!(num & BIO_FP_TEXT))
284 OPENSSL_strlcat(p, "b", sizeof(p));
286 fp = openssl_fopen(ptr, p);
288 FUNCerr("fopen", get_last_sys_error());
289 ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
290 BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
296 /* we did fopen -> we disengage UPLINK */
297 BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
299 case BIO_C_GET_FILE_PTR:
300 /* the ptr parameter is actually a FILE ** in this case. */
303 *fpp = (FILE *)b->ptr;
306 case BIO_CTRL_GET_CLOSE:
307 ret = (long)b->shutdown;
309 case BIO_CTRL_SET_CLOSE:
310 b->shutdown = (int)num;
313 st = b->flags & BIO_FLAGS_UPLINK_INTERNAL
314 ? UP_fflush(b->ptr) : fflush((FILE *)b->ptr);
316 FUNCerr("fflush", get_last_sys_error());
317 ERR_add_error_data(1, "fflush()");
318 BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
326 case BIO_CTRL_WPENDING:
327 case BIO_CTRL_PENDING:
337 static int file_gets(BIO *bp, char *buf, int size)
342 if (bp->flags & BIO_FLAGS_UPLINK_INTERNAL) {
343 if (!UP_fgets(buf, size, bp->ptr))
346 if (!fgets(buf, size, (FILE *)bp->ptr))
355 static int file_puts(BIO *bp, const char *str)
360 ret = file_write(bp, str, n);
366 static int file_write(BIO *b, const char *in, int inl)
370 static int file_read(BIO *b, char *out, int outl)
374 static int file_puts(BIO *bp, const char *str)
378 static int file_gets(BIO *bp, char *buf, int size)
382 static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
386 static int file_new(BIO *bi)
390 static int file_free(BIO *a)
395 static const BIO_METHOD methods_filep = {
398 /* TODO: Convert to new style write function */
401 /* TODO: Convert to new style read function */
409 NULL, /* file_callback_ctrl */
412 const BIO_METHOD *BIO_s_file(void)
414 return &methods_filep;
417 BIO *BIO_new_file(const char *filename, const char *mode)
422 #endif /* OPENSSL_NO_STDIO */