bss_file.c revision 55714 
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	};
95
96BIO *BIO_new_file(const char *filename, const char *mode)
97	{
98	BIO *ret;
99	FILE *file;
100
101	if ((file=fopen(filename,mode)) == NULL)
102		{
103		SYSerr(SYS_F_FOPEN,get_last_sys_error());
104		ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
105		BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
106		return(NULL);
107		}
108	if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
109		return(NULL);
110
111	BIO_set_fp(ret,file,BIO_CLOSE);
112	return(ret);
113	}
114
115BIO *BIO_new_fp(FILE *stream, int close_flag)
116	{
117	BIO *ret;
118
119	if ((ret=BIO_new(BIO_s_file())) == NULL)
120		return(NULL);
121
122	BIO_set_fp(ret,stream,close_flag);
123	return(ret);
124	}
125
126BIO_METHOD *BIO_s_file(void)
127	{
128	return(&methods_filep);
129	}
130
131static int MS_CALLBACK file_new(BIO *bi)
132	{
133	bi->init=0;
134	bi->num=0;
135	bi->ptr=NULL;
136	return(1);
137	}
138
139static int MS_CALLBACK file_free(BIO *a)
140	{
141	if (a == NULL) return(0);
142	if (a->shutdown)
143		{
144		if ((a->init) && (a->ptr != NULL))
145			{
146			fclose((FILE *)a->ptr);
147			a->ptr=NULL;
148			}
149		a->init=0;
150		}
151	return(1);
152	}
153
154static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
155	{
156	int ret=0;
157
158	if (b->init && (out != NULL))
159		{
160		ret=fread(out,1,(int)outl,(FILE *)b->ptr);
161		}
162	return(ret);
163	}
164
165static int MS_CALLBACK file_write(BIO *b, char *in, int inl)
166	{
167	int ret=0;
168
169	if (b->init && (in != NULL))
170		{
171		if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
172			ret=inl;
173		/* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
174		/* acording to Tim Hudson <tjh@cryptsoft.com>, the commented
175		 * out version above can cause 'inl' write calls under
176		 * some stupid stdio implementations (VMS) */
177		}
178	return(ret);
179	}
180
181static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, char *ptr)
182	{
183	long ret=1;
184	FILE *fp=(FILE *)b->ptr;
185	FILE **fpp;
186	char p[4];
187
188	switch (cmd)
189		{
190	case BIO_C_FILE_SEEK:
191	case BIO_CTRL_RESET:
192		ret=(long)fseek(fp,num,0);
193		break;
194	case BIO_CTRL_EOF:
195		ret=(long)feof(fp);
196		break;
197	case BIO_C_FILE_TELL:
198	case BIO_CTRL_INFO:
199		ret=ftell(fp);
200		break;
201	case BIO_C_SET_FILE_PTR:
202		file_free(b);
203		b->shutdown=(int)num&BIO_CLOSE;
204		b->ptr=(char *)ptr;
205		b->init=1;
206#if defined(MSDOS) || defined(WINDOWS)
207		/* Set correct text/binary mode */
208		if (num & BIO_FP_TEXT)
209			_setmode(fileno((FILE *)ptr),_O_TEXT);
210		else
211			_setmode(fileno((FILE *)ptr),_O_BINARY);
212#endif
213		break;
214	case BIO_C_SET_FILENAME:
215		file_free(b);
216		b->shutdown=(int)num&BIO_CLOSE;
217		if (num & BIO_FP_APPEND)
218			{
219			if (num & BIO_FP_READ)
220				strcpy(p,"a+");
221			else	strcpy(p,"a");
222			}
223		else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
224			strcpy(p,"r+");
225		else if (num & BIO_FP_WRITE)
226			strcpy(p,"w");
227		else if (num & BIO_FP_READ)
228			strcpy(p,"r");
229		else
230			{
231			BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
232			ret=0;
233			break;
234			}
235#if defined(MSDOS) || defined(WINDOWS)
236		if (!(num & BIO_FP_TEXT))
237			strcat(p,"b");
238		else
239			strcat(p,"t");
240#endif
241		fp=fopen(ptr,p);
242		if (fp == NULL)
243			{
244			SYSerr(SYS_F_FOPEN,get_last_sys_error());
245			ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
246			BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
247			ret=0;
248			break;
249			}
250		b->ptr=(char *)fp;
251		b->init=1;
252		break;
253	case BIO_C_GET_FILE_PTR:
254		/* the ptr parameter is actually a FILE ** in this case. */
255		if (ptr != NULL)
256			{
257			fpp=(FILE **)ptr;
258			*fpp=(FILE *)b->ptr;
259			}
260		break;
261	case BIO_CTRL_GET_CLOSE:
262		ret=(long)b->shutdown;
263		break;
264	case BIO_CTRL_SET_CLOSE:
265		b->shutdown=(int)num;
266		break;
267	case BIO_CTRL_FLUSH:
268		fflush((FILE *)b->ptr);
269		break;
270	case BIO_CTRL_DUP:
271		ret=1;
272		break;
273
274	case BIO_CTRL_WPENDING:
275	case BIO_CTRL_PENDING:
276	case BIO_CTRL_PUSH:
277	case BIO_CTRL_POP:
278	default:
279		ret=0;
280		break;
281		}
282	return(ret);
283	}
284
285static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
286	{
287	int ret=0;
288
289	buf[0]='\0';
290	fgets(buf,size,(FILE *)bp->ptr);
291	if (buf[0] != '\0')
292		ret=strlen(buf);
293	return(ret);
294	}
295
296static int MS_CALLBACK file_puts(BIO *bp, char *str)
297	{
298	int n,ret;
299
300	n=strlen(str);
301	ret=file_write(bp,str,n);
302	return(ret);
303	}
304
305#endif /* NO_STDIO */
306
307#endif /* HEADER_BSS_FILE_C */
308
309
310