1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#if defined(__linux) || defined(__sun) || defined(__hpux)
58// Following definition aliases fopen to fopen64 on above mentioned
59// platforms. This makes it possible to open and sequentially access
60// files larger than 2GB from 32-bit application. It does not allow to
61// traverse them beyond 2GB with fseek/ftell, but on the other hand *no*
62// 32-bit platform permits that, not with fseek/ftell. Not to mention
63// that breaking 2GB limit for seeking would require surgery to *our*
64// API. But sequential access suffices for practical cases when you
65// can run into large files, such as fingerprinting, so we can let API
66// alone. For reference, the list of 32-bit platforms which allow for
67// sequential access of large files without extra "magic" comprise *BSD,
68// Darwin, IRIX...
69#ifndef _FILE_OFFSET_BITS
70#define _FILE_OFFSET_BITS 64
71#endif
72#endif
73
74#include <openssl/bio.h>
75
76#if !defined(OPENSSL_TRUSTY)
77
78#include <errno.h>
79#include <stdio.h>
80#include <string.h>
81
82#include <openssl/buf.h>
83#include <openssl/err.h>
84#include <openssl/mem.h>
85
86#include "../internal.h"
87
88
89#define BIO_FP_READ 0x02
90#define BIO_FP_WRITE 0x04
91#define BIO_FP_APPEND 0x08
92
93BIO *BIO_new_file(const char *filename, const char *mode) {
94 BIO *ret;
95 FILE *file;
96
97 file = fopen(filename, mode);
98 if (file == NULL) {
99 OPENSSL_PUT_SYSTEM_ERROR();
100
101 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
102 if (errno == ENOENT) {
103 OPENSSL_PUT_ERROR(BIO, BIO_R_NO_SUCH_FILE);
104 } else {
105 OPENSSL_PUT_ERROR(BIO, BIO_R_SYS_LIB);
106 }
107 return NULL;
108 }
109
110 ret = BIO_new_fp(file, BIO_CLOSE);
111 if (ret == NULL) {
112 fclose(file);
113 return NULL;
114 }
115
116 return ret;
117}
118
119BIO *BIO_new_fp(FILE *stream, int close_flag) {
120 BIO *ret = BIO_new(BIO_s_file());
121
122 if (ret == NULL) {
123 return NULL;
124 }
125
126 BIO_set_fp(ret, stream, close_flag);
127 return ret;
128}
129
130static int file_new(BIO *bio) { return 1; }
131
132static int file_free(BIO *bio) {
133 if (bio == NULL) {
134 return 0;
135 }
136
137 if (!bio->shutdown) {
138 return 1;
139 }
140
141 if (bio->init && bio->ptr != NULL) {
142 fclose(bio->ptr);
143 bio->ptr = NULL;
144 }
145 bio->init = 0;
146
147 return 1;
148}
149
150static int file_read(BIO *b, char *out, int outl) {
151 if (!b->init) {
152 return 0;
153 }
154
155 size_t ret = fread(out, 1, outl, (FILE *)b->ptr);
156 if (ret == 0 && ferror((FILE *)b->ptr)) {
157 OPENSSL_PUT_SYSTEM_ERROR();
158 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
159 return -1;
160 }
161
162 // fread reads at most |outl| bytes, so |ret| fits in an int.
163 return (int)ret;
164}
165
166static int file_write(BIO *b, const char *in, int inl) {
167 int ret = 0;
168
169 if (!b->init) {
170 return 0;
171 }
172
173 ret = fwrite(in, inl, 1, (FILE *)b->ptr);
174 if (ret > 0) {
175 ret = inl;
176 }
177 return ret;
178}
179
180static long file_ctrl(BIO *b, int cmd, long num, void *ptr) {
181 long ret = 1;
182 FILE *fp = (FILE *)b->ptr;
183 FILE **fpp;
184 char p[4];
185
186 switch (cmd) {
187 case BIO_CTRL_RESET:
188 num = 0;
189 OPENSSL_FALLTHROUGH;
190 case BIO_C_FILE_SEEK:
191 ret = (long)fseek(fp, num, 0);
192 break;
193 case BIO_CTRL_EOF:
194 ret = (long)feof(fp);
195 break;
196 case BIO_C_FILE_TELL:
197 case BIO_CTRL_INFO:
198 ret = ftell(fp);
199 break;
200 case BIO_C_SET_FILE_PTR:
201 file_free(b);
202 b->shutdown = (int)num & BIO_CLOSE;
203 b->ptr = ptr;
204 b->init = 1;
205 break;
206 case BIO_C_SET_FILENAME:
207 file_free(b);
208 b->shutdown = (int)num & BIO_CLOSE;
209 if (num & BIO_FP_APPEND) {
210 if (num & BIO_FP_READ) {
211 BUF_strlcpy(p, "a+", sizeof(p));
212 } else {
213 BUF_strlcpy(p, "a", sizeof(p));
214 }
215 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) {
216 BUF_strlcpy(p, "r+", sizeof(p));
217 } else if (num & BIO_FP_WRITE) {
218 BUF_strlcpy(p, "w", sizeof(p));
219 } else if (num & BIO_FP_READ) {
220 BUF_strlcpy(p, "r", sizeof(p));
221 } else {
222 OPENSSL_PUT_ERROR(BIO, BIO_R_BAD_FOPEN_MODE);
223 ret = 0;
224 break;
225 }
226 fp = fopen(ptr, p);
227 if (fp == NULL) {
228 OPENSSL_PUT_SYSTEM_ERROR();
229 ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
230 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
231 ret = 0;
232 break;
233 }
234 b->ptr = fp;
235 b->init = 1;
236 break;
237 case BIO_C_GET_FILE_PTR:
238 // the ptr parameter is actually a FILE ** in this case.
239 if (ptr != NULL) {
240 fpp = (FILE **)ptr;
241 *fpp = (FILE *)b->ptr;
242 }
243 break;
244 case BIO_CTRL_GET_CLOSE:
245 ret = (long)b->shutdown;
246 break;
247 case BIO_CTRL_SET_CLOSE:
248 b->shutdown = (int)num;
249 break;
250 case BIO_CTRL_FLUSH:
251 ret = 0 == fflush((FILE *)b->ptr);
252 break;
253 case BIO_CTRL_WPENDING:
254 case BIO_CTRL_PENDING:
255 default:
256 ret = 0;
257 break;
258 }
259 return ret;
260}
261
262static int file_gets(BIO *bp, char *buf, int size) {
263 int ret = 0;
264
265 if (size == 0) {
266 return 0;
267 }
268
269 if (!fgets(buf, size, (FILE *)bp->ptr)) {
270 buf[0] = 0;
271 goto err;
272 }
273 ret = strlen(buf);
274
275err:
276 return ret;
277}
278
279static const BIO_METHOD methods_filep = {
280 BIO_TYPE_FILE, "FILE pointer",
281 file_write, file_read,
282 NULL /* puts */, file_gets,
283 file_ctrl, file_new,
284 file_free, NULL /* callback_ctrl */,
285};
286
287const BIO_METHOD *BIO_s_file(void) { return &methods_filep; }
288
289
290int BIO_get_fp(BIO *bio, FILE **out_file) {
291 return BIO_ctrl(bio, BIO_C_GET_FILE_PTR, 0, (char*) out_file);
292}
293
294int BIO_set_fp(BIO *bio, FILE *file, int close_flag) {
295 return BIO_ctrl(bio, BIO_C_SET_FILE_PTR, close_flag, (char *) file);
296}
297
298int BIO_read_filename(BIO *bio, const char *filename) {
299 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_READ,
300 (char *)filename);
301}
302
303int BIO_write_filename(BIO *bio, const char *filename) {
304 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_WRITE,
305 (char *)filename);
306}
307
308int BIO_append_filename(BIO *bio, const char *filename) {
309 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_APPEND,
310 (char *)filename);
311}
312
313int BIO_rw_filename(BIO *bio, const char *filename) {
314 return BIO_ctrl(bio, BIO_C_SET_FILENAME,
315 BIO_CLOSE | BIO_FP_READ | BIO_FP_WRITE, (char *)filename);
316}
317
318#endif // OPENSSL_TRUSTY
319