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_NO_STDIO)
93
94 static int MS_CALLBACK file_write(BIO *h, const char *buf, int num);
95 static int MS_CALLBACK file_read(BIO *h, char *buf, int size);
96 static int MS_CALLBACK file_puts(BIO *h, const char *str);
97 static int MS_CALLBACK file_gets(BIO *h, char *str, int size);
98 static long MS_CALLBACK file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
99 static int MS_CALLBACK file_new(BIO *h);
100 static int MS_CALLBACK file_free(BIO *data);
101 static BIO_METHOD methods_filep=
102 {
103 BIO_TYPE_FILE,
104 "FILE pointer",
105 file_write,
106 file_read,
107 file_puts,
108 file_gets,
109 file_ctrl,
110 file_new,
111 file_free,
112 NULL,
113 };
114
BIO_new_file(const char * filename,const char * mode)115 BIO *BIO_new_file(const char *filename, const char *mode)
116 {
117 BIO *ret;
118 FILE *file;
119
120 if ((file=fopen(filename,mode)) == NULL)
121 {
122 SYSerr(SYS_F_FOPEN,get_last_sys_error());
123 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
124 if (errno == ENOENT)
125 BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE);
126 else
127 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
128 return(NULL);
129 }
130 if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
131 return(NULL);
132
133 BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
134 BIO_set_fp(ret,file,BIO_CLOSE);
135 return(ret);
136 }
137
BIO_new_fp(FILE * stream,int close_flag)138 BIO *BIO_new_fp(FILE *stream, int close_flag)
139 {
140 BIO *ret;
141
142 if ((ret=BIO_new(BIO_s_file())) == NULL)
143 return(NULL);
144
145 BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */
146 BIO_set_fp(ret,stream,close_flag);
147 return(ret);
148 }
149
BIO_s_file(void)150 BIO_METHOD *BIO_s_file(void)
151 {
152 return(&methods_filep);
153 }
154
file_new(BIO * bi)155 static int MS_CALLBACK file_new(BIO *bi)
156 {
157 bi->init=0;
158 bi->num=0;
159 bi->ptr=NULL;
160 bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */
161 return(1);
162 }
163
file_free(BIO * a)164 static int MS_CALLBACK file_free(BIO *a)
165 {
166 if (a == NULL) return(0);
167 if (a->shutdown)
168 {
169 if ((a->init) && (a->ptr != NULL))
170 {
171 if (a->flags&BIO_FLAGS_UPLINK)
172 UP_fclose (a->ptr);
173 else
174 fclose (a->ptr);
175 a->ptr=NULL;
176 a->flags=BIO_FLAGS_UPLINK;
177 }
178 a->init=0;
179 }
180 return(1);
181 }
182
file_read(BIO * b,char * out,int outl)183 static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
184 {
185 int ret=0;
186
187 if (b->init && (out != NULL))
188 {
189 if (b->flags&BIO_FLAGS_UPLINK)
190 ret=UP_fread(out,1,(int)outl,b->ptr);
191 else
192 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
193 if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr))
194 {
195 SYSerr(SYS_F_FREAD,get_last_sys_error());
196 BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB);
197 ret=-1;
198 }
199 }
200 return(ret);
201 }
202
file_write(BIO * b,const char * in,int inl)203 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)
204 {
205 int ret=0;
206
207 if (b->init && (in != NULL))
208 {
209 if (b->flags&BIO_FLAGS_UPLINK)
210 ret=UP_fwrite(in,(int)inl,1,b->ptr);
211 else
212 ret=fwrite(in,(int)inl,1,(FILE *)b->ptr);
213 if (ret)
214 ret=inl;
215 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
216 /* according to Tim Hudson <tjh@cryptsoft.com>, the commented
217 * out version above can cause 'inl' write calls under
218 * some stupid stdio implementations (VMS) */
219 }
220 return(ret);
221 }
222
file_ctrl(BIO * b,int cmd,long num,void * ptr)223 static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, void *ptr)
224 {
225 long ret=1;
226 FILE *fp=(FILE *)b->ptr;
227 FILE **fpp;
228 char p[4];
229
230 switch (cmd)
231 {
232 case BIO_C_FILE_SEEK:
233 case BIO_CTRL_RESET:
234 if (b->flags&BIO_FLAGS_UPLINK)
235 ret=(long)UP_fseek(b->ptr,num,0);
236 else
237 ret=(long)fseek(fp,num,0);
238 break;
239 case BIO_CTRL_EOF:
240 if (b->flags&BIO_FLAGS_UPLINK)
241 ret=(long)UP_feof(fp);
242 else
243 ret=(long)feof(fp);
244 break;
245 case BIO_C_FILE_TELL:
246 case BIO_CTRL_INFO:
247 if (b->flags&BIO_FLAGS_UPLINK)
248 ret=UP_ftell(b->ptr);
249 else
250 ret=ftell(fp);
251 break;
252 case BIO_C_SET_FILE_PTR:
253 file_free(b);
254 b->shutdown=(int)num&BIO_CLOSE;
255 b->ptr=ptr;
256 b->init=1;
257 #if BIO_FLAGS_UPLINK!=0
258 #if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
259 #define _IOB_ENTRIES 20
260 #endif
261 #if defined(_IOB_ENTRIES)
262 /* Safety net to catch purely internal BIO_set_fp calls */
263 if ((size_t)ptr >= (size_t)stdin &&
264 (size_t)ptr < (size_t)(stdin+_IOB_ENTRIES))
265 BIO_clear_flags(b,BIO_FLAGS_UPLINK);
266 #endif
267 #endif
268 #ifdef UP_fsetmode
269 if (b->flags&BIO_FLAGS_UPLINK)
270 UP_fsetmode(b->ptr,num&BIO_FP_TEXT?'t':'b');
271 else
272 #endif
273 {
274 #if defined(OPENSSL_SYS_WINDOWS)
275 int fd = fileno((FILE*)ptr);
276 if (num & BIO_FP_TEXT)
277 _setmode(fd,_O_TEXT);
278 else
279 _setmode(fd,_O_BINARY);
280 #elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)
281 int fd = fileno((FILE*)ptr);
282 /* Under CLib there are differences in file modes
283 */
284 if (num & BIO_FP_TEXT)
285 _setmode(fd,O_TEXT);
286 else
287 _setmode(fd,O_BINARY);
288 #elif defined(OPENSSL_SYS_MSDOS)
289 int fd = fileno((FILE*)ptr);
290 /* Set correct text/binary mode */
291 if (num & BIO_FP_TEXT)
292 _setmode(fd,_O_TEXT);
293 /* Dangerous to set stdin/stdout to raw (unless redirected) */
294 else
295 {
296 if (fd == STDIN_FILENO || fd == STDOUT_FILENO)
297 {
298 if (isatty(fd) <= 0)
299 _setmode(fd,_O_BINARY);
300 }
301 else
302 _setmode(fd,_O_BINARY);
303 }
304 #elif defined(OPENSSL_SYS_OS2)
305 int fd = fileno((FILE*)ptr);
306 if (num & BIO_FP_TEXT)
307 setmode(fd, O_TEXT);
308 else
309 setmode(fd, O_BINARY);
310 #endif
311 }
312 break;
313 case BIO_C_SET_FILENAME:
314 file_free(b);
315 b->shutdown=(int)num&BIO_CLOSE;
316 if (num & BIO_FP_APPEND)
317 {
318 if (num & BIO_FP_READ)
319 BUF_strlcpy(p,"a+",sizeof p);
320 else BUF_strlcpy(p,"a",sizeof p);
321 }
322 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
323 BUF_strlcpy(p,"r+",sizeof p);
324 else if (num & BIO_FP_WRITE)
325 BUF_strlcpy(p,"w",sizeof p);
326 else if (num & BIO_FP_READ)
327 BUF_strlcpy(p,"r",sizeof p);
328 else
329 {
330 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
331 ret=0;
332 break;
333 }
334 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)
335 if (!(num & BIO_FP_TEXT))
336 strcat(p,"b");
337 else
338 strcat(p,"t");
339 #endif
340 #if defined(OPENSSL_SYS_NETWARE)
341 if (!(num & BIO_FP_TEXT))
342 strcat(p,"b");
343 else
344 strcat(p,"t");
345 #endif
346 fp=fopen(ptr,p);
347 if (fp == NULL)
348 {
349 SYSerr(SYS_F_FOPEN,get_last_sys_error());
350 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
351 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
352 ret=0;
353 break;
354 }
355 b->ptr=fp;
356 b->init=1;
357 BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
358 break;
359 case BIO_C_GET_FILE_PTR:
360 /* the ptr parameter is actually a FILE ** in this case. */
361 if (ptr != NULL)
362 {
363 fpp=(FILE **)ptr;
364 *fpp=(FILE *)b->ptr;
365 }
366 break;
367 case BIO_CTRL_GET_CLOSE:
368 ret=(long)b->shutdown;
369 break;
370 case BIO_CTRL_SET_CLOSE:
371 b->shutdown=(int)num;
372 break;
373 case BIO_CTRL_FLUSH:
374 if (b->flags&BIO_FLAGS_UPLINK)
375 UP_fflush(b->ptr);
376 else
377 fflush((FILE *)b->ptr);
378 break;
379 case BIO_CTRL_DUP:
380 ret=1;
381 break;
382
383 case BIO_CTRL_WPENDING:
384 case BIO_CTRL_PENDING:
385 case BIO_CTRL_PUSH:
386 case BIO_CTRL_POP:
387 default:
388 ret=0;
389 break;
390 }
391 return(ret);
392 }
393
file_gets(BIO * bp,char * buf,int size)394 static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
395 {
396 int ret=0;
397
398 buf[0]='\0';
399 if (bp->flags&BIO_FLAGS_UPLINK)
400 UP_fgets(buf,size,bp->ptr);
401 else
402 fgets(buf,size,(FILE *)bp->ptr);
403 if (buf[0] != '\0')
404 ret=strlen(buf);
405 return(ret);
406 }
407
file_puts(BIO * bp,const char * str)408 static int MS_CALLBACK file_puts(BIO *bp, const char *str)
409 {
410 int n,ret;
411
412 n=strlen(str);
413 ret=file_write(bp,str,n);
414 return(ret);
415 }
416
417 #endif /* OPENSSL_NO_STDIO */
418
419 #endif /* HEADER_BSS_FILE_C */
420
421
422