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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#include <stdio.h>
69#include <errno.h>
70#include "cryptlib.h"
71#include "bio.h"
72#include "err.h"
73
74#if !defined(NO_STDIO)
75
76#ifndef NOPROTO
77static int MS_CALLBACK file_write(BIO *h,char *buf,int num);
78static int MS_CALLBACK file_read(BIO *h,char *buf,int size);
79static int MS_CALLBACK file_puts(BIO *h,char *str);
80static int MS_CALLBACK file_gets(BIO *h,char *str,int size);
81static long MS_CALLBACK file_ctrl(BIO *h,int cmd,long arg1,char *arg2);
82static int MS_CALLBACK file_new(BIO *h);
83static int MS_CALLBACK file_free(BIO *data);
84#else
85static int MS_CALLBACK file_write();
86static int MS_CALLBACK file_read();
87static int MS_CALLBACK file_puts();
88static int MS_CALLBACK file_gets();
89static long MS_CALLBACK file_ctrl();
90static int MS_CALLBACK file_new();
91static int MS_CALLBACK file_free();
92#endif
93
94static BIO_METHOD methods_filep=
95 {
96 BIO_TYPE_FILE,
97 "FILE pointer",
98 file_write,
99 file_read,
100 file_puts,
101 file_gets,
102 file_ctrl,
103 file_new,
104 file_free,
105 };
106
107BIO *BIO_new_file(filename,mode)
108char *filename;
109char *mode;
110 {
111 BIO *ret;
112 FILE *file;
113
114 if ((file=fopen(filename,mode)) == NULL)
115 {
116 SYSerr(SYS_F_FOPEN,get_last_sys_error());
117 ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
118 BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
119 return(NULL);
120 }
121 if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
122 return(NULL);
123
124 BIO_set_fp(ret,file,BIO_CLOSE);
125 return(ret);
126 }
127
128BIO *BIO_new_fp(stream,close_flag)
129FILE *stream;
130int close_flag;
131 {
132 BIO *ret;
133
134 if ((ret=BIO_new(BIO_s_file())) == NULL)
135 return(NULL);
136
137 BIO_set_fp(ret,stream,close_flag);
138 return(ret);
139 }
140
141BIO_METHOD *BIO_s_file()
142 {
143 return(&methods_filep);
144 }
145
146static int MS_CALLBACK file_new(bi)
147BIO *bi;
148 {
149 bi->init=0;
150 bi->num=0;
151 bi->ptr=NULL;
152 return(1);
153 }
154
155static int MS_CALLBACK file_free(a)
156BIO *a;
157 {
158 if (a == NULL) return(0);
159 if (a->shutdown)
160 {
161 if ((a->init) && (a->ptr != NULL))
162 {
163 fclose((FILE *)a->ptr);
164 a->ptr=NULL;
165 }
166 a->init=0;
167 }
168 return(1);
169 }
170
171static int MS_CALLBACK file_read(b,out,outl)
172BIO *b;
173char *out;
174int outl;
175 {
176 int ret=0;
177
178 if (b->init && (out != NULL))
179 {
180 ret=fread(out,1,(int)outl,(FILE *)b->ptr);
181 }
182 return(ret);
183 }
184
185static int MS_CALLBACK file_write(b,in,inl)
186BIO *b;
187char *in;
188int inl;
189 {
190 int ret=0;
191
192 if (b->init && (in != NULL))
193 {
194 if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
195 ret=inl;
196 /* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
197 /* acording to Tim Hudson <tjh@cryptsoft.com>, the commented
198 * out version above can cause 'inl' write calls under
199 * some stupid stdio implementations (VMS) */
200 }
201 return(ret);
202 }
203
204static long MS_CALLBACK file_ctrl(b,cmd,num,ptr)
205BIO *b;
206int cmd;
207long num;
208char *ptr;
209 {
210 long ret=1;
211 FILE *fp=(FILE *)b->ptr;
212 FILE **fpp;
213 char p[4];
214
215 switch (cmd)
216 {
217 case BIO_CTRL_RESET:
218 ret=(long)fseek(fp,num,0);
219 break;
220 case BIO_CTRL_EOF:
221 ret=(long)feof(fp);
222 break;
223 case BIO_CTRL_INFO:
224 ret=ftell(fp);
225 break;
226 case BIO_C_SET_FILE_PTR:
227 file_free(b);
228 b->shutdown=(int)num;
229 b->ptr=(char *)ptr;
230 b->init=1;
231#if defined(MSDOS) || defined(WINDOWS)
232 /* Set correct text/binary mode */
233 if (num & BIO_FP_TEXT)
234 _setmode(fileno((FILE *)ptr),_O_TEXT);
235 else
236 _setmode(fileno((FILE *)ptr),_O_BINARY);
237#endif
238 break;
239 case BIO_C_SET_FILENAME:
240 file_free(b);
241 b->shutdown=(int)num&BIO_CLOSE;
242 if (num & BIO_FP_APPEND)
243 {
244 if (num & BIO_FP_READ)
245 strcpy(p,"a+");
246 else strcpy(p,"a");
247 }
248 else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
249 strcpy(p,"r+");
250 else if (num & BIO_FP_WRITE)
251 strcpy(p,"w");
252 else if (num & BIO_FP_READ)
253 strcpy(p,"r");
254 else
255 {
256 BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
257 ret=0;
258 break;
259 }
260#if defined(MSDOS) || defined(WINDOWS)
261 if (!(num & BIO_FP_TEXT))
262 strcat(p,"b");
263 else
264 strcat(p,"t");
265#endif
266 fp=fopen(ptr,p);
267 if (fp == NULL)
268 {
269 SYSerr(SYS_F_FOPEN,get_last_sys_error());
270 ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
271 BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
272 ret=0;
273 break;
274 }
275 b->ptr=(char *)fp;
276 b->init=1;
277 break;
278 case BIO_C_GET_FILE_PTR:
279 /* the ptr parameter is actually a FILE ** in this case. */
280 if (ptr != NULL)
281 {
282 fpp=(FILE **)ptr;
283 *fpp=(FILE *)b->ptr;
284 }
285 break;
286 case BIO_CTRL_GET_CLOSE:
287 ret=(long)b->shutdown;
288 break;
289 case BIO_CTRL_SET_CLOSE:
290 b->shutdown=(int)num;
291 break;
292 case BIO_CTRL_FLUSH:
293 fflush((FILE *)b->ptr);
294 break;
295 case BIO_CTRL_DUP:
296 ret=1;
297 break;
298
299 case BIO_CTRL_WPENDING:
300 case BIO_CTRL_PENDING:
301 case BIO_CTRL_PUSH:
302 case BIO_CTRL_POP:
303 default:
304 ret=0;
305 break;
306 }
307 return(ret);
308 }
309
310static int MS_CALLBACK file_gets(bp,buf,size)
311BIO *bp;
312char *buf;
313int size;
314 {
315 int ret=0;
316
317 buf[0]='\0';
318 fgets(buf,size,(FILE *)bp->ptr);
319 if (buf[0] != '\0')
320 ret=strlen(buf);
321 return(ret);
322 }
323
324static int MS_CALLBACK file_puts(bp,str)
325BIO *bp;
326char *str;
327 {
328 int n,ret;
329
330 n=strlen(str);
331 ret=file_write(bp,str,n);
332 return(ret);
333 }
334
335#endif /* NO_STDIO */
336
337#endif /* HEADER_BSS_FILE_C */
338
339
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