bss_file.c revision 59191 
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 <openssl/bio.h>
72#include <openssl/err.h>
73
74#if !defined(NO_STDIO)
75
76static int MS_CALLBACK file_write(BIO *h,char *buf,int num);
77static int MS_CALLBACK file_read(BIO *h,char *buf,int size);
78static int MS_CALLBACK file_puts(BIO *h,char *str);
79static int MS_CALLBACK file_gets(BIO *h,char *str,int size);
80static long MS_CALLBACK file_ctrl(BIO *h,int cmd,long arg1,char *arg2);
81static int MS_CALLBACK file_new(BIO *h);
82static int MS_CALLBACK file_free(BIO *data);
83static BIO_METHOD methods_filep=
84	{
85	BIO_TYPE_FILE,
86	"FILE pointer",
87	file_write,
88	file_read,
89	file_puts,
90	file_gets,
91	file_ctrl,
92	file_new,
93	file_free,
94	NULL,
95	};
96
97BIO *BIO_new_file(const char *filename, const char *mode)
98	{
99	BIO *ret;
100	FILE *file;
101
102	if ((file=fopen(filename,mode)) == NULL)
103		{
104		SYSerr(SYS_F_FOPEN,get_last_sys_error());
105		ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
106		BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
107		return(NULL);
108		}
109	if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
110		return(NULL);
111
112	BIO_set_fp(ret,file,BIO_CLOSE);
113	return(ret);
114	}
115
116BIO *BIO_new_fp(FILE *stream, int close_flag)
117	{
118	BIO *ret;
119
120	if ((ret=BIO_new(BIO_s_file())) == NULL)
121		return(NULL);
122
123	BIO_set_fp(ret,stream,close_flag);
124	return(ret);
125	}
126
127BIO_METHOD *BIO_s_file(void)
128	{
129	return(&methods_filep);
130	}
131
132static int MS_CALLBACK file_new(BIO *bi)
133	{
134	bi->init=0;
135	bi->num=0;
136	bi->ptr=NULL;
137	return(1);
138	}
139
140static int MS_CALLBACK file_free(BIO *a)
141	{
142	if (a == NULL) return(0);
143	if (a->shutdown)
144		{
145		if ((a->init) && (a->ptr != NULL))
146			{
147			fclose((FILE *)a->ptr);
148			a->ptr=NULL;
149			}
150		a->init=0;
151		}
152	return(1);
153	}
154
155static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
156	{
157	int ret=0;
158
159	if (b->init && (out != NULL))
160		{
161		ret=fread(out,1,(int)outl,(FILE *)b->ptr);
162		}
163	return(ret);
164	}
165
166static int MS_CALLBACK file_write(BIO *b, char *in, int inl)
167	{
168	int ret=0;
169
170	if (b->init && (in != NULL))
171		{
172		if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
173			ret=inl;
174		/* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
175		/* according to Tim Hudson <tjh@cryptsoft.com>, the commented
176		 * out version above can cause 'inl' write calls under
177		 * some stupid stdio implementations (VMS) */
178		}
179	return(ret);
180	}
181
182static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, char *ptr)
183	{
184	long ret=1;
185	FILE *fp=(FILE *)b->ptr;
186	FILE **fpp;
187	char p[4];
188
189	switch (cmd)
190		{
191	case BIO_C_FILE_SEEK:
192	case BIO_CTRL_RESET:
193		ret=(long)fseek(fp,num,0);
194		break;
195	case BIO_CTRL_EOF:
196		ret=(long)feof(fp);
197		break;
198	case BIO_C_FILE_TELL:
199	case BIO_CTRL_INFO:
200		ret=ftell(fp);
201		break;
202	case BIO_C_SET_FILE_PTR:
203		file_free(b);
204		b->shutdown=(int)num&BIO_CLOSE;
205		b->ptr=(char *)ptr;
206		b->init=1;
207#if defined(MSDOS) || defined(WINDOWS)
208		/* Set correct text/binary mode */
209		if (num & BIO_FP_TEXT)
210			_setmode(fileno((FILE *)ptr),_O_TEXT);
211		else
212			_setmode(fileno((FILE *)ptr),_O_BINARY);
213#endif
214		break;
215	case BIO_C_SET_FILENAME:
216		file_free(b);
217		b->shutdown=(int)num&BIO_CLOSE;
218		if (num & BIO_FP_APPEND)
219			{
220			if (num & BIO_FP_READ)
221				strcpy(p,"a+");
222			else	strcpy(p,"a");
223			}
224		else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
225			strcpy(p,"r+");
226		else if (num & BIO_FP_WRITE)
227			strcpy(p,"w");
228		else if (num & BIO_FP_READ)
229			strcpy(p,"r");
230		else
231			{
232			BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
233			ret=0;
234			break;
235			}
236#if defined(MSDOS) || defined(WINDOWS)
237		if (!(num & BIO_FP_TEXT))
238			strcat(p,"b");
239		else
240			strcat(p,"t");
241#endif
242		fp=fopen(ptr,p);
243		if (fp == NULL)
244			{
245			SYSerr(SYS_F_FOPEN,get_last_sys_error());
246			ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
247			BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
248			ret=0;
249			break;
250			}
251		b->ptr=(char *)fp;
252		b->init=1;
253		break;
254	case BIO_C_GET_FILE_PTR:
255		/* the ptr parameter is actually a FILE ** in this case. */
256		if (ptr != NULL)
257			{
258			fpp=(FILE **)ptr;
259			*fpp=(FILE *)b->ptr;
260			}
261		break;
262	case BIO_CTRL_GET_CLOSE:
263		ret=(long)b->shutdown;
264		break;
265	case BIO_CTRL_SET_CLOSE:
266		b->shutdown=(int)num;
267		break;
268	case BIO_CTRL_FLUSH:
269		fflush((FILE *)b->ptr);
270		break;
271	case BIO_CTRL_DUP:
272		ret=1;
273		break;
274
275	case BIO_CTRL_WPENDING:
276	case BIO_CTRL_PENDING:
277	case BIO_CTRL_PUSH:
278	case BIO_CTRL_POP:
279	default:
280		ret=0;
281		break;
282		}
283	return(ret);
284	}
285
286static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
287	{
288	int ret=0;
289
290	buf[0]='\0';
291	fgets(buf,size,(FILE *)bp->ptr);
292	if (buf[0] != '\0')
293		ret=strlen(buf);
294	return(ret);
295	}
296
297static int MS_CALLBACK file_puts(BIO *bp, char *str)
298	{
299	int n,ret;
300
301	n=strlen(str);
302	ret=file_write(bp,str,n);
303	return(ret);
304	}
305
306#endif /* NO_STDIO */
307
308#endif /* HEADER_BSS_FILE_C */
309
310
311