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authorcvs2svn <admin@example.com>2015-03-08 16:48:48 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:48 +0000
commitda1a9ad3a4a867ba6569c05e6fca66d7f296c553 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libcrypto/bio/bss_file.c
parent973703db67a8e73d70e63afa8f2cde19da09144d (diff)
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diff --git a/src/lib/libcrypto/bio/bss_file.c b/src/lib/libcrypto/bio/bss_file.c
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1/* $OpenBSD: bss_file.c,v 1.31 2014/11/11 19:26:12 miod Exp $ */
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 <errno.h>
87#include <stdio.h>
88#include <string.h>
89
90#include <openssl/bio.h>
91#include <openssl/err.h>
92
93static int file_write(BIO *h, const char *buf, int num);
94static int file_read(BIO *h, char *buf, int size);
95static int file_puts(BIO *h, const char *str);
96static int file_gets(BIO *h, char *str, int size);
97static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
98static int file_new(BIO *h);
99static int file_free(BIO *data);
100
101static BIO_METHOD methods_filep = {
102 .type = BIO_TYPE_FILE,
103 .name = "FILE pointer",
104 .bwrite = file_write,
105 .bread = file_read,
106 .bputs = file_puts,
107 .bgets = file_gets,
108 .ctrl = file_ctrl,
109 .create = file_new,
110 .destroy = file_free
111};
112
113BIO *
114BIO_new_file(const char *filename, const char *mode)
115{
116 BIO *ret;
117 FILE *file = NULL;
118
119 file = fopen(filename, mode);
120
121 if (file == NULL) {
122 SYSerr(SYS_F_FOPEN, errno);
123 ERR_asprintf_error_data("fopen('%s', '%s')", 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())) == NULL) {
131 fclose(file);
132 return (NULL);
133 }
134
135 BIO_set_fp(ret, file, BIO_CLOSE);
136 return (ret);
137}
138
139BIO *
140BIO_new_fp(FILE *stream, int close_flag)
141{
142 BIO *ret;
143
144 if ((ret = BIO_new(BIO_s_file())) == NULL)
145 return (NULL);
146
147 BIO_set_fp(ret, stream, close_flag);
148 return (ret);
149}
150
151BIO_METHOD *
152BIO_s_file(void)
153{
154 return (&methods_filep);
155}
156
157static int
158file_new(BIO *bi)
159{
160 bi->init = 0;
161 bi->num = 0;
162 bi->ptr = NULL;
163 bi->flags=0;
164 return (1);
165}
166
167static int
168file_free(BIO *a)
169{
170 if (a == NULL)
171 return (0);
172 if (a->shutdown) {
173 if ((a->init) && (a->ptr != NULL)) {
174 fclose (a->ptr);
175 a->ptr = NULL;
176 a->flags = 0;
177 }
178 a->init = 0;
179 }
180 return (1);
181}
182
183static int
184file_read(BIO *b, char *out, int outl)
185{
186 int ret = 0;
187
188 if (b->init && out != NULL) {
189 ret = fread(out, 1, outl, (FILE *)b->ptr);
190 if (ret == 0 && ferror((FILE *)b->ptr)) {
191 SYSerr(SYS_F_FREAD, errno);
192 BIOerr(BIO_F_FILE_READ, ERR_R_SYS_LIB);
193 ret = -1;
194 }
195 }
196 return (ret);
197}
198
199static int
200file_write(BIO *b, const char *in, int inl)
201{
202 int ret = 0;
203
204 if (b->init && in != NULL)
205 ret = fwrite(in, 1, inl, (FILE *)b->ptr);
206 return (ret);
207}
208
209static long
210file_ctrl(BIO *b, int cmd, long num, void *ptr)
211{
212 long ret = 1;
213 FILE *fp = (FILE *)b->ptr;
214 FILE **fpp;
215 char p[4];
216
217 switch (cmd) {
218 case BIO_C_FILE_SEEK:
219 case BIO_CTRL_RESET:
220 ret = (long)fseek(fp, num, 0);
221 break;
222 case BIO_CTRL_EOF:
223 ret = (long)feof(fp);
224 break;
225 case BIO_C_FILE_TELL:
226 case BIO_CTRL_INFO:
227 ret = ftell(fp);
228 break;
229 case BIO_C_SET_FILE_PTR:
230 file_free(b);
231 b->shutdown = (int)num&BIO_CLOSE;
232 b->ptr = ptr;
233 b->init = 1;
234 break;
235 case BIO_C_SET_FILENAME:
236 file_free(b);
237 b->shutdown = (int)num&BIO_CLOSE;
238 if (num & BIO_FP_APPEND) {
239 if (num & BIO_FP_READ)
240 strlcpy(p, "a+", sizeof p);
241 else strlcpy(p, "a", sizeof p);
242 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
243 strlcpy(p, "r+", sizeof p);
244 else if (num & BIO_FP_WRITE)
245 strlcpy(p, "w", sizeof p);
246 else if (num & BIO_FP_READ)
247 strlcpy(p, "r", sizeof p);
248 else {
249 BIOerr(BIO_F_FILE_CTRL, BIO_R_BAD_FOPEN_MODE);
250 ret = 0;
251 break;
252 }
253 fp = fopen(ptr, p);
254 if (fp == NULL) {
255 SYSerr(SYS_F_FOPEN, errno);
256 ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p);
257 BIOerr(BIO_F_FILE_CTRL, ERR_R_SYS_LIB);
258 ret = 0;
259 break;
260 }
261 b->ptr = fp;
262 b->init = 1;
263 break;
264 case BIO_C_GET_FILE_PTR:
265 /* the ptr parameter is actually a FILE ** in this case. */
266 if (ptr != NULL) {
267 fpp = (FILE **)ptr;
268 *fpp = (FILE *)b->ptr;
269 }
270 break;
271 case BIO_CTRL_GET_CLOSE:
272 ret = (long)b->shutdown;
273 break;
274 case BIO_CTRL_SET_CLOSE:
275 b->shutdown = (int)num;
276 break;
277 case BIO_CTRL_FLUSH:
278 fflush((FILE *)b->ptr);
279 break;
280 case BIO_CTRL_DUP:
281 ret = 1;
282 break;
283
284 case BIO_CTRL_WPENDING:
285 case BIO_CTRL_PENDING:
286 case BIO_CTRL_PUSH:
287 case BIO_CTRL_POP:
288 default:
289 ret = 0;
290 break;
291 }
292 return (ret);
293}
294
295static int
296file_gets(BIO *bp, char *buf, int size)
297{
298 int ret = 0;
299
300 buf[0] = '\0';
301 if (!fgets(buf, size,(FILE *)bp->ptr))
302 goto err;
303 if (buf[0] != '\0')
304 ret = strlen(buf);
305err:
306 return (ret);
307}
308
309static int
310file_puts(BIO *bp, const char *str)
311{
312 int n, ret;
313
314 n = strlen(str);
315 ret = file_write(bp, str, n);
316 return (ret);
317}
318
319
320#endif /* HEADER_BSS_FILE_C */
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