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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/* Following definition aliases fopen to fopen64 on above mentioned
70 * platforms. This makes it possible to open and sequentially access
71 * files larger than 2GB from 32-bit application. It does not allow to
72 * traverse them beyond 2GB with fseek/ftell, but on the other hand *no*
73 * 32-bit platform permits that, not with fseek/ftell. Not to mention
74 * that breaking 2GB limit for seeking would require surgery to *our*
75 * API. But sequential access suffices for practical cases when you
76 * can run into large files, such as fingerprinting, so we can let API
77 * alone. For reference, the list of 32-bit platforms which allow for
78 * sequential access of large files without extra "magic" comprise *BSD,
79 * 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 {
107 BIO_TYPE_FILE,
108 "FILE pointer",
109 file_write,
110 file_read,
111 file_puts,
112 file_gets,
113 file_ctrl,
114 file_new,
115 file_free,
116 NULL,
117 };
118
119BIO *BIO_new_file(const char *filename, const char *mode)
120 {
121 BIO *ret;
122 FILE *file=NULL;
123
124#if defined(_WIN32) && defined(CP_UTF8)
125 int sz, len_0 = (int)strlen(filename)+1;
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,MB_ERR_INVALID_CHARS,
140 filename,len_0,NULL,0))>0)
141 {
142 WCHAR wmode[8];
143 WCHAR *wfilename = _alloca(sz*sizeof(WCHAR));
144
145 if (MultiByteToWideChar(CP_UTF8,MB_ERR_INVALID_CHARS,
146 filename,len_0,wfilename,sz) &&
147 MultiByteToWideChar(CP_UTF8,0,mode,strlen(mode)+1,
148 wmode,sizeof(wmode)/sizeof(wmode[0])) &&
149 (file=_wfopen(wfilename,wmode))==NULL && errno==ENOENT
150 ) /* UTF-8 decode succeeded, but no file, filename
151 * could still have been locale-ized... */
152 file = fopen(filename,mode);
153 }
154 else if (GetLastError()==ERROR_NO_UNICODE_TRANSLATION)
155 {
156 file = fopen(filename,mode);
157 }
158#else
159 file=fopen(filename,mode);
160#endif
161 if (file == NULL)
162 {
163 SYSerr(SYS_F_FOPEN,get_last_sys_error());
164 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
165 if (errno == ENOENT)
166 BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE);
167 else
168 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
169 return(NULL);
170 }
171 if ((ret=BIO_new(BIO_s_file())) == NULL)
172 {
173 fclose(file);
174 return(NULL);
175 }
176
177 BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
178 BIO_set_fp(ret,file,BIO_CLOSE);
179 return(ret);
180 }
181
182BIO *BIO_new_fp(FILE *stream, int close_flag)
183 {
184 BIO *ret;
185
186 if ((ret=BIO_new(BIO_s_file())) == NULL)
187 return(NULL);
188
189 BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */
190 BIO_set_fp(ret,stream,close_flag);
191 return(ret);
192 }
193
194BIO_METHOD *BIO_s_file(void)
195 {
196 return(&methods_filep);
197 }
198
199static int MS_CALLBACK file_new(BIO *bi)
200 {
201 bi->init=0;
202 bi->num=0;
203 bi->ptr=NULL;
204 bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */
205 return(1);
206 }
207
208static int MS_CALLBACK file_free(BIO *a)
209 {
210 if (a == NULL) return(0);
211 if (a->shutdown)
212 {
213 if ((a->init) && (a->ptr != NULL))
214 {
215 if (a->flags&BIO_FLAGS_UPLINK)
216 UP_fclose (a->ptr);
217 else
218 fclose (a->ptr);
219 a->ptr=NULL;
220 a->flags=BIO_FLAGS_UPLINK;
221 }
222 a->init=0;
223 }
224 return(1);
225 }
226
227static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
228 {
229 int ret=0;
230
231 if (b->init && (out != NULL))
232 {
233 if (b->flags&BIO_FLAGS_UPLINK)
234 ret=UP_fread(out,1,(int)outl,b->ptr);
235 else
236 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
237 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr))
238 {
239 SYSerr(SYS_F_FREAD,get_last_sys_error());
240 BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB);
241 ret=-1;
242 }
243 }
244 return(ret);
245 }
246
247static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
248 {
249 int ret=0;
250
251 if (b->init && (in != NULL))
252 {
253 if (b->flags&BIO_FLAGS_UPLINK)
254 ret=UP_fwrite(in,(int)inl,1,b->ptr);
255 else
256 ret=fwrite(in,(int)inl,1,(FILE *)b->ptr);
257 if (ret)
258 ret=inl;
259 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
260 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
261 * out version above can cause 'inl' write calls under
262 * some stupid stdio implementations (VMS) */
263 }
264 return(ret);
265 }
266
267static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
268 {
269 long ret=1;
270 FILE *fp=(FILE *)b->ptr;
271 FILE **fpp;
272 char p[4];
273
274 switch (cmd)
275 {
276 case BIO_C_FILE_SEEK:
277 case BIO_CTRL_RESET:
278 if (b->flags&BIO_FLAGS_UPLINK)
279 ret=(long)UP_fseek(b->ptr,num,0);
280 else
281 ret=(long)fseek(fp,num,0);
282 break;
283 case BIO_CTRL_EOF:
284 if (b->flags&BIO_FLAGS_UPLINK)
285 ret=(long)UP_feof(fp);
286 else
287 ret=(long)feof(fp);
288 break;
289 case BIO_C_FILE_TELL:
290 case BIO_CTRL_INFO:
291 if (b->flags&BIO_FLAGS_UPLINK)
292 ret=UP_ftell(b->ptr);
293 else
294 ret=ftell(fp);
295 break;
296 case BIO_C_SET_FILE_PTR:
297 file_free(b);
298 b->shutdown=(int)num&BIO_CLOSE;
299 b->ptr=ptr;
300 b->init=1;
301#if BIO_FLAGS_UPLINK!=0
302#if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
303#define _IOB_ENTRIES 20
304#endif
305#if defined(_IOB_ENTRIES)
306 /* Safety net to catch purely internal BIO_set_fp calls */
307 if ((size_t)ptr >= (size_t)stdin &&
308 (size_t)ptr < (size_t)(stdin+_IOB_ENTRIES))
309 BIO_clear_flags(b,BIO_FLAGS_UPLINK);
310#endif
311#endif
312#ifdef UP_fsetmod
313 if (b->flags&BIO_FLAGS_UPLINK)
314 UP_fsetmod(b->ptr,(char)((num&BIO_FP_TEXT)?'t':'b'));
315 else
316#endif
317 {
318#if defined(OPENSSL_SYS_WINDOWS)
319 int fd = _fileno((FILE*)ptr);
320 if (num & BIO_FP_TEXT)
321 _setmode(fd,_O_TEXT);
322 else
323 _setmode(fd,_O_BINARY);
324#elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
325 int fd = fileno((FILE*)ptr);
326 /* Under CLib there are differences in file modes */
327 if (num & BIO_FP_TEXT)
328 setmode(fd,O_TEXT);
329 else
330 setmode(fd,O_BINARY);
331#elif defined(OPENSSL_SYS_MSDOS)
332 int fd = fileno((FILE*)ptr);
333 /* Set correct text/binary mode */
334 if (num & BIO_FP_TEXT)
335 _setmode(fd,_O_TEXT);
336 /* Dangerous to set stdin/stdout to raw (unless redirected) */
337 else
338 {
339 if (fd == STDIN_FILENO || fd == STDOUT_FILENO)
340 {
341 if (isatty(fd) <= 0)
342 _setmode(fd,_O_BINARY);
343 }
344 else
345 _setmode(fd,_O_BINARY);
346 }
347#elif defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
348 int fd = fileno((FILE*)ptr);
349 if (num & BIO_FP_TEXT)
350 setmode(fd, O_TEXT);
351 else
352 setmode(fd, O_BINARY);
353#endif
354 }
355 break;
356 case BIO_C_SET_FILENAME:
357 file_free(b);
358 b->shutdown=(int)num&BIO_CLOSE;
359 if (num & BIO_FP_APPEND)
360 {
361 if (num & BIO_FP_READ)
362 BUF_strlcpy(p,"a+",sizeof p);
363 else BUF_strlcpy(p,"a",sizeof p);
364 }
365 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
366 BUF_strlcpy(p,"r+",sizeof p);
367 else if (num & BIO_FP_WRITE)
368 BUF_strlcpy(p,"w",sizeof p);
369 else if (num & BIO_FP_READ)
370 BUF_strlcpy(p,"r",sizeof p);
371 else
372 {
373 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
374 ret=0;
375 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 fp=fopen(ptr,p);
390 if (fp == NULL)
391 {
392 SYSerr(SYS_F_FOPEN,get_last_sys_error());
393 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
394 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
395 ret=0;
396 break;
397 }
398 b->ptr=fp;
399 b->init=1;
400 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
401 break;
402 case BIO_C_GET_FILE_PTR:
403 /* the ptr parameter is actually a FILE ** in this case. */
404 if (ptr != NULL)
405 {
406 fpp=(FILE **)ptr;
407 *fpp=(FILE *)b->ptr;
408 }
409 break;
410 case BIO_CTRL_GET_CLOSE:
411 ret=(long)b->shutdown;
412 break;
413 case BIO_CTRL_SET_CLOSE:
414 b->shutdown=(int)num;
415 break;
416 case BIO_CTRL_FLUSH:
417 if (b->flags&BIO_FLAGS_UPLINK)
418 UP_fflush(b->ptr);
419 else
420 fflush((FILE *)b->ptr);
421 break;
422 case BIO_CTRL_DUP:
423 ret=1;
424 break;
425
426 case BIO_CTRL_WPENDING:
427 case BIO_CTRL_PENDING:
428 case BIO_CTRL_PUSH:
429 case BIO_CTRL_POP:
430 default:
431 ret=0;
432 break;
433 }
434 return(ret);
435 }
436
437static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
438 {
439 int ret=0;
440
441 buf[0]='\0';
442 if (bp->flags&BIO_FLAGS_UPLINK)
443 {
444 if (!UP_fgets(buf,size,bp->ptr))
445 goto err;
446 }
447 else
448 {
449 if (!fgets(buf,size,(FILE *)bp->ptr))
450 goto err;
451 }
452 if (buf[0] != '\0')
453 ret=strlen(buf);
454 err:
455 return(ret);
456 }
457
458static int MS_CALLBACK file_puts(BIO *bp, const char *str)
459 {
460 int n,ret;
461
462 n=strlen(str);
463 ret=file_write(bp,str,n);
464 return(ret);
465 }
466
467#endif /* OPENSSL_NO_STDIO */
468
469#endif /* HEADER_BSS_FILE_C */
470
471
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