Line data Source code
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 :
98 : static int MS_CALLBACK file_write(BIO *h, const char *buf, int num);
99 : static int MS_CALLBACK file_read(BIO *h, char *buf, int size);
100 : static int MS_CALLBACK file_puts(BIO *h, const char *str);
101 : static int MS_CALLBACK file_gets(BIO *h, char *str, int size);
102 : static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
103 : static int MS_CALLBACK file_new(BIO *h);
104 : static int MS_CALLBACK file_free(BIO *data);
105 : static 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 :
118 0 : BIO *BIO_new_file(const char *filename, const char *mode)
119 : {
120 : BIO *ret;
121 : FILE *file = NULL;
122 :
123 : # if defined(_WIN32) && defined(CP_UTF8)
124 : int sz, len_0 = (int)strlen(filename) + 1;
125 : DWORD flags;
126 :
127 : /*
128 : * Basically there are three cases to cover: a) filename is
129 : * pure ASCII string; b) actual UTF-8 encoded string and
130 : * c) locale-ized string, i.e. one containing 8-bit
131 : * characters that are meaningful in current system locale.
132 : * If filename is pure ASCII or real UTF-8 encoded string,
133 : * MultiByteToWideChar succeeds and _wfopen works. If
134 : * filename is locale-ized string, chances are that
135 : * MultiByteToWideChar fails reporting
136 : * ERROR_NO_UNICODE_TRANSLATION, in which case we fall
137 : * back to fopen...
138 : */
139 : if ((sz = MultiByteToWideChar(CP_UTF8, (flags = MB_ERR_INVALID_CHARS),
140 : filename, len_0, NULL, 0)) > 0 ||
141 : (GetLastError() == ERROR_INVALID_FLAGS &&
142 : (sz = MultiByteToWideChar(CP_UTF8, (flags = 0),
143 : filename, len_0, NULL, 0)) > 0)
144 : ) {
145 : WCHAR wmode[8];
146 : WCHAR *wfilename = _alloca(sz * sizeof(WCHAR));
147 :
148 : if (MultiByteToWideChar(CP_UTF8, flags,
149 : filename, len_0, wfilename, sz) &&
150 : MultiByteToWideChar(CP_UTF8, 0, mode, strlen(mode) + 1,
151 : wmode, sizeof(wmode) / sizeof(wmode[0])) &&
152 : (file = _wfopen(wfilename, wmode)) == NULL &&
153 : (errno == ENOENT || errno == EBADF)
154 : ) {
155 : /*
156 : * UTF-8 decode succeeded, but no file, filename
157 : * could still have been locale-ized...
158 : */
159 : file = fopen(filename, mode);
160 : }
161 : } else if (GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {
162 : file = fopen(filename, mode);
163 : }
164 : # else
165 0 : file = fopen(filename, mode);
166 : # endif
167 0 : if (file == NULL) {
168 0 : SYSerr(SYS_F_FOPEN, get_last_sys_error());
169 0 : ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
170 0 : if (errno == ENOENT)
171 0 : BIOerr(BIO_F_BIO_NEW_FILE, BIO_R_NO_SUCH_FILE);
172 : else
173 0 : BIOerr(BIO_F_BIO_NEW_FILE, ERR_R_SYS_LIB);
174 : return (NULL);
175 : }
176 0 : if ((ret = BIO_new(BIO_s_file())) == NULL) {
177 0 : fclose(file);
178 0 : return (NULL);
179 : }
180 :
181 0 : BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
182 : * UPLINK */
183 0 : BIO_set_fp(ret, file, BIO_CLOSE);
184 0 : return (ret);
185 : }
186 :
187 0 : BIO *BIO_new_fp(FILE *stream, int close_flag)
188 : {
189 : BIO *ret;
190 :
191 0 : if ((ret = BIO_new(BIO_s_file())) == NULL)
192 : return (NULL);
193 :
194 0 : BIO_set_flags(ret, BIO_FLAGS_UPLINK); /* redundant, left for
195 : * documentation puposes */
196 0 : BIO_set_fp(ret, stream, close_flag);
197 0 : return (ret);
198 : }
199 :
200 0 : BIO_METHOD *BIO_s_file(void)
201 : {
202 0 : return (&methods_filep);
203 : }
204 :
205 0 : static int MS_CALLBACK file_new(BIO *bi)
206 : {
207 0 : bi->init = 0;
208 0 : bi->num = 0;
209 0 : bi->ptr = NULL;
210 0 : bi->flags = BIO_FLAGS_UPLINK; /* default to UPLINK */
211 0 : return (1);
212 : }
213 :
214 0 : static int MS_CALLBACK file_free(BIO *a)
215 : {
216 0 : if (a == NULL)
217 : return (0);
218 0 : if (a->shutdown) {
219 0 : if ((a->init) && (a->ptr != NULL)) {
220 : if (a->flags & BIO_FLAGS_UPLINK)
221 : UP_fclose(a->ptr);
222 : else
223 0 : fclose(a->ptr);
224 0 : a->ptr = NULL;
225 0 : a->flags = BIO_FLAGS_UPLINK;
226 : }
227 0 : a->init = 0;
228 : }
229 : return (1);
230 : }
231 :
232 0 : static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
233 : {
234 : int ret = 0;
235 :
236 0 : if (b->init && (out != NULL)) {
237 : if (b->flags & BIO_FLAGS_UPLINK)
238 : ret = UP_fread(out, 1, (int)outl, b->ptr);
239 : else
240 0 : ret = fread(out, 1, (int)outl, (FILE *)b->ptr);
241 0 : if (ret == 0
242 : && (b->flags & BIO_FLAGS_UPLINK) ? UP_ferror((FILE *)b->ptr) :
243 0 : ferror((FILE *)b->ptr)) {
244 0 : SYSerr(SYS_F_FREAD, get_last_sys_error());
245 0 : BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB);
246 : ret = -1;
247 : }
248 : }
249 0 : return (ret);
250 : }
251 :
252 0 : static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
253 : {
254 : int ret = 0;
255 :
256 0 : if (b->init && (in != NULL)) {
257 : if (b->flags & BIO_FLAGS_UPLINK)
258 : ret = UP_fwrite(in, (int)inl, 1, b->ptr);
259 : else
260 0 : ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr);
261 0 : if (ret)
262 : ret = inl;
263 : /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
264 : /*
265 : * according to Tim Hudson <tjh@cryptsoft.com>, the commented out
266 : * version above can cause 'inl' write calls under some stupid stdio
267 : * implementations (VMS)
268 : */
269 : }
270 0 : return (ret);
271 : }
272 :
273 0 : static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
274 : {
275 : long ret = 1;
276 0 : FILE *fp = (FILE *)b->ptr;
277 : FILE **fpp;
278 : char p[4];
279 :
280 0 : switch (cmd) {
281 : case BIO_C_FILE_SEEK:
282 : case BIO_CTRL_RESET:
283 : if (b->flags & BIO_FLAGS_UPLINK)
284 : ret = (long)UP_fseek(b->ptr, num, 0);
285 : else
286 0 : ret = (long)fseek(fp, num, 0);
287 0 : break;
288 : case BIO_CTRL_EOF:
289 : if (b->flags & BIO_FLAGS_UPLINK)
290 : ret = (long)UP_feof(fp);
291 : else
292 0 : ret = (long)feof(fp);
293 0 : break;
294 : case BIO_C_FILE_TELL:
295 : case BIO_CTRL_INFO:
296 : if (b->flags & BIO_FLAGS_UPLINK)
297 : ret = UP_ftell(b->ptr);
298 : else
299 0 : ret = ftell(fp);
300 0 : break;
301 : case BIO_C_SET_FILE_PTR:
302 0 : file_free(b);
303 0 : b->shutdown = (int)num & BIO_CLOSE;
304 0 : b->ptr = ptr;
305 0 : b->init = 1;
306 : # if BIO_FLAGS_UPLINK!=0
307 : # if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
308 : # define _IOB_ENTRIES 20
309 : # endif
310 : # if defined(_IOB_ENTRIES)
311 : /* Safety net to catch purely internal BIO_set_fp calls */
312 : if ((size_t)ptr >= (size_t)stdin &&
313 : (size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
314 : BIO_clear_flags(b, BIO_FLAGS_UPLINK);
315 : # endif
316 : # endif
317 : # ifdef UP_fsetmod
318 : if (b->flags & BIO_FLAGS_UPLINK)
319 : UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
320 : else
321 : # endif
322 : {
323 : # if defined(OPENSSL_SYS_WINDOWS)
324 : int fd = _fileno((FILE *)ptr);
325 : if (num & BIO_FP_TEXT)
326 : _setmode(fd, _O_TEXT);
327 : else
328 : _setmode(fd, _O_BINARY);
329 : # elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
330 : int fd = fileno((FILE *)ptr);
331 : /* Under CLib there are differences in file modes */
332 : if (num & BIO_FP_TEXT)
333 : setmode(fd, O_TEXT);
334 : else
335 : setmode(fd, O_BINARY);
336 : # elif defined(OPENSSL_SYS_MSDOS)
337 : int fd = fileno((FILE *)ptr);
338 : /* Set correct text/binary mode */
339 : if (num & BIO_FP_TEXT)
340 : _setmode(fd, _O_TEXT);
341 : /* Dangerous to set stdin/stdout to raw (unless redirected) */
342 : else {
343 : if (fd == STDIN_FILENO || fd == STDOUT_FILENO) {
344 : if (isatty(fd) <= 0)
345 : _setmode(fd, _O_BINARY);
346 : } else
347 : _setmode(fd, _O_BINARY);
348 : }
349 : # elif defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
350 : int fd = fileno((FILE *)ptr);
351 : if (num & BIO_FP_TEXT)
352 : setmode(fd, O_TEXT);
353 : else
354 : setmode(fd, O_BINARY);
355 : # endif
356 : }
357 0 : break;
358 : case BIO_C_SET_FILENAME:
359 0 : file_free(b);
360 0 : b->shutdown = (int)num & BIO_CLOSE;
361 0 : if (num & BIO_FP_APPEND) {
362 0 : if (num & BIO_FP_READ)
363 0 : BUF_strlcpy(p, "a+", sizeof p);
364 : else
365 0 : BUF_strlcpy(p, "a", sizeof p);
366 0 : } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
367 0 : BUF_strlcpy(p, "r+", sizeof p);
368 0 : else if (num & BIO_FP_WRITE)
369 0 : BUF_strlcpy(p, "w", sizeof p);
370 0 : else if (num & BIO_FP_READ)
371 0 : BUF_strlcpy(p, "r", sizeof p);
372 : else {
373 0 : BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
374 : ret = 0;
375 0 : break;
376 : }
377 : # if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
378 : if (!(num & BIO_FP_TEXT))
379 : strcat(p, "b");
380 : else
381 : strcat(p, "t");
382 : # endif
383 : # if defined(OPENSSL_SYS_NETWARE)
384 : if (!(num & BIO_FP_TEXT))
385 : strcat(p, "b");
386 : else
387 : strcat(p, "t");
388 : # endif
389 0 : fp = fopen(ptr, p);
390 0 : if (fp == NULL) {
391 0 : SYSerr(SYS_F_FOPEN, get_last_sys_error());
392 0 : ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
393 0 : BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
394 : ret = 0;
395 0 : break;
396 : }
397 0 : b->ptr = fp;
398 0 : b->init = 1;
399 0 : BIO_clear_flags(b, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
400 : * UPLINK */
401 0 : break;
402 : case BIO_C_GET_FILE_PTR:
403 : /* the ptr parameter is actually a FILE ** in this case. */
404 0 : if (ptr != NULL) {
405 : fpp = (FILE **)ptr;
406 0 : *fpp = (FILE *)b->ptr;
407 : }
408 : break;
409 : case BIO_CTRL_GET_CLOSE:
410 0 : ret = (long)b->shutdown;
411 0 : break;
412 : case BIO_CTRL_SET_CLOSE:
413 0 : b->shutdown = (int)num;
414 0 : break;
415 : case BIO_CTRL_FLUSH:
416 : if (b->flags & BIO_FLAGS_UPLINK)
417 : UP_fflush(b->ptr);
418 : else
419 0 : fflush((FILE *)b->ptr);
420 0 : break;
421 : case BIO_CTRL_DUP:
422 : ret = 1;
423 : break;
424 :
425 : case BIO_CTRL_WPENDING:
426 : case BIO_CTRL_PENDING:
427 : case BIO_CTRL_PUSH:
428 : case BIO_CTRL_POP:
429 : default:
430 : ret = 0;
431 0 : break;
432 : }
433 0 : return (ret);
434 : }
435 :
436 0 : static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
437 : {
438 : int ret = 0;
439 :
440 0 : buf[0] = '\0';
441 : if (bp->flags & BIO_FLAGS_UPLINK) {
442 : if (!UP_fgets(buf, size, bp->ptr))
443 : goto err;
444 : } else {
445 0 : if (!fgets(buf, size, (FILE *)bp->ptr))
446 : goto err;
447 : }
448 0 : if (buf[0] != '\0')
449 0 : ret = strlen(buf);
450 : err:
451 0 : return (ret);
452 : }
453 :
454 0 : static int MS_CALLBACK file_puts(BIO *bp, const char *str)
455 : {
456 : int n, ret;
457 :
458 0 : n = strlen(str);
459 0 : ret = file_write(bp, str, n);
460 0 : return (ret);
461 : }
462 :
463 : # endif /* OPENSSL_NO_STDIO */
464 :
465 : #endif /* HEADER_BSS_FILE_C */
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