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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;
123
124 if ((file=fopen(filename,mode)) == NULL)
125 {
126 SYSerr(SYS_F_FOPEN,get_last_sys_error());
127 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
128 if (errno == ENOENT)
129 BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE);
130 else
131 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
132 return(NULL);
133 }
134 if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
135 {
136 fclose(file);
137 return(NULL);
138 }
139
140 BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
141 BIO_set_fp(ret,file,BIO_CLOSE);
142 return(ret);
143 }
144
145BIO *BIO_new_fp(FILE *stream, int close_flag)
146 {
147 BIO *ret;
148
149 if ((ret=BIO_new(BIO_s_file())) == NULL)
150 return(NULL);
151
152 BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */
153 BIO_set_fp(ret,stream,close_flag);
154 return(ret);
155 }
156
157BIO_METHOD *BIO_s_file(void)
158 {
159 return(&methods_filep);
160 }
161
162static int MS_CALLBACK file_new(BIO *bi)
163 {
164 bi->init=0;
165 bi->num=0;
166 bi->ptr=NULL;
167 bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */
168 return(1);
169 }
170
171static int MS_CALLBACK file_free(BIO *a)
172 {
173 if (a == NULL) return(0);
174 if (a->shutdown)
175 {
176 if ((a->init) && (a->ptr != NULL))
177 {
178 if (a->flags&BIO_FLAGS_UPLINK)
179 UP_fclose (a->ptr);
180 else
181 fclose (a->ptr);
182 a->ptr=NULL;
183 a->flags=BIO_FLAGS_UPLINK;
184 }
185 a->init=0;
186 }
187 return(1);
188 }
189
190static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
191 {
192 int ret=0;
193
194 if (b->init && (out != NULL))
195 {
196 if (b->flags&BIO_FLAGS_UPLINK)
197 ret=UP_fread(out,1,(int)outl,b->ptr);
198 else
199 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
200 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr))
201 {
202 SYSerr(SYS_F_FREAD,get_last_sys_error());
203 BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB);
204 ret=-1;
205 }
206 }
207 return(ret);
208 }
209
210static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
211 {
212 int ret=0;
213
214 if (b->init && (in != NULL))
215 {
216 if (b->flags&BIO_FLAGS_UPLINK)
217 ret=UP_fwrite(in,(int)inl,1,b->ptr);
218 else
219 ret=fwrite(in,(int)inl,1,(FILE *)b->ptr);
220 if (ret)
221 ret=inl;
222 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
223 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
224 * out version above can cause 'inl' write calls under
225 * some stupid stdio implementations (VMS) */
226 }
227 return(ret);
228 }
229
230static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
231 {
232 long ret=1;
233 FILE *fp=(FILE *)b->ptr;
234 FILE **fpp;
235 char p[4];
236
237 switch (cmd)
238 {
239 case BIO_C_FILE_SEEK:
240 case BIO_CTRL_RESET:
241 if (b->flags&BIO_FLAGS_UPLINK)
242 ret=(long)UP_fseek(b->ptr,num,0);
243 else
244 ret=(long)fseek(fp,num,SEEK_SET);
245 break;
246 case BIO_CTRL_EOF:
247 if (b->flags&BIO_FLAGS_UPLINK)
248 ret=(long)UP_feof(fp);
249 else
250 ret=(long)feof(fp);
251 break;
252 case BIO_C_FILE_TELL:
253 case BIO_CTRL_INFO:
254 if (b->flags&BIO_FLAGS_UPLINK)
255 ret=UP_ftell(b->ptr);
256 else
257 ret=ftell(fp);
258 break;
259 case BIO_C_SET_FILE_PTR:
260 file_free(b);
261 b->shutdown=(int)num&BIO_CLOSE;
262 b->ptr=ptr;
263 b->init=1;
264#if BIO_FLAGS_UPLINK!=0
265#if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
266#define _IOB_ENTRIES 20
267#endif
268#if defined(_IOB_ENTRIES)
269 /* Safety net to catch purely internal BIO_set_fp calls */
270 if ((size_t)ptr >= (size_t)stdin &&
271 (size_t)ptr < (size_t)(stdin+_IOB_ENTRIES))
272 BIO_clear_flags(b,BIO_FLAGS_UPLINK);
273#endif
274#endif
275#ifdef UP_fsetmode
276 if (b->flags&BIO_FLAGS_UPLINK)
277 UP_fsetmode(b->ptr,num&BIO_FP_TEXT?'t':'b');
278 else
279#endif
280 {
281#if defined(OPENSSL_SYS_WINDOWS)
282 int fd = _fileno((FILE*)ptr);
283 if (num & BIO_FP_TEXT)
284 _setmode(fd,_O_TEXT);
285 else
286 _setmode(fd,_O_BINARY);
287#elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
288 int fd = fileno((FILE*)ptr);
289 /* Under CLib there are differences in file modes
290 */
291 if (num & BIO_FP_TEXT)
292 setmode(fd,O_TEXT);
293 else
294 setmode(fd,O_BINARY);
295#elif defined(OPENSSL_SYS_MSDOS)
296 int fd = fileno((FILE*)ptr);
297 /* Set correct text/binary mode */
298 if (num & BIO_FP_TEXT)
299 _setmode(fd,_O_TEXT);
300 /* Dangerous to set stdin/stdout to raw (unless redirected) */
301 else
302 {
303 if (fd == STDIN_FILENO || fd == STDOUT_FILENO)
304 {
305 if (isatty(fd) <= 0)
306 _setmode(fd,_O_BINARY);
307 }
308 else
309 _setmode(fd,_O_BINARY);
310 }
311#elif defined(OPENSSL_SYS_OS2)
312 int fd = fileno((FILE*)ptr);
313 if (num & BIO_FP_TEXT)
314 setmode(fd, O_TEXT);
315 else
316 setmode(fd, O_BINARY);
317#endif
318 }
319 break;
320 case BIO_C_SET_FILENAME:
321 file_free(b);
322 b->shutdown=(int)num&BIO_CLOSE;
323 if (num & BIO_FP_APPEND)
324 {
325 if (num & BIO_FP_READ)
326 BUF_strlcpy(p,"a+",sizeof p);
327 else BUF_strlcpy(p,"a",sizeof p);
328 }
329 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
330 BUF_strlcpy(p,"r+",sizeof p);
331 else if (num & BIO_FP_WRITE)
332 BUF_strlcpy(p,"w",sizeof p);
333 else if (num & BIO_FP_READ)
334 BUF_strlcpy(p,"r",sizeof p);
335 else
336 {
337 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
338 ret=0;
339 break;
340 }
341#if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
342 if (!(num & BIO_FP_TEXT))
343 strcat(p,"b");
344 else
345 strcat(p,"t");
346#endif
347#if defined(OPENSSL_SYS_NETWARE)
348 if (!(num & BIO_FP_TEXT))
349 strcat(p,"b");
350 else
351 strcat(p,"t");
352#endif
353 fp=fopen(ptr,p);
354 if (fp == NULL)
355 {
356 SYSerr(SYS_F_FOPEN,get_last_sys_error());
357 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
358 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
359 ret=0;
360 break;
361 }
362 b->ptr=fp;
363 b->init=1;
364 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
365 break;
366 case BIO_C_GET_FILE_PTR:
367 /* the ptr parameter is actually a FILE ** in this case. */
368 if (ptr != NULL)
369 {
370 fpp=(FILE **)ptr;
371 *fpp=(FILE *)b->ptr;
372 }
373 break;
374 case BIO_CTRL_GET_CLOSE:
375 ret=(long)b->shutdown;
376 break;
377 case BIO_CTRL_SET_CLOSE:
378 b->shutdown=(int)num;
379 break;
380 case BIO_CTRL_FLUSH:
381 if (b->flags&BIO_FLAGS_UPLINK)
382 UP_fflush(b->ptr);
383 else
384 fflush((FILE *)b->ptr);
385 break;
386 case BIO_CTRL_DUP:
387 ret=1;
388 break;
389
390 case BIO_CTRL_WPENDING:
391 case BIO_CTRL_PENDING:
392 case BIO_CTRL_PUSH:
393 case BIO_CTRL_POP:
394 default:
395 ret=0;
396 break;
397 }
398 return(ret);
399 }
400
401static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
402 {
403 int ret=0;
404
405 buf[0]='\0';
406 if (bp->flags&BIO_FLAGS_UPLINK)
407 UP_fgets(buf,size,bp->ptr);
408 else
409 fgets(buf,size,(FILE *)bp->ptr);
410 if (buf[0] != '\0')
411 ret=strlen(buf);
412 return(ret);
413 }
414
415static int MS_CALLBACK file_puts(BIO *bp, const char *str)
416 {
417 int n,ret;
418
419 n=strlen(str);
420 ret=file_write(bp,str,n);
421 return(ret);
422 }
423
424#endif /* OPENSSL_NO_STDIO */
425
426#endif /* HEADER_BSS_FILE_C */
427
428
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