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/err.h>
83 #include <openssl/mem.h>
84
85 #include "../internal.h"
86
87
88 #define BIO_FP_READ 0x02
89 #define BIO_FP_WRITE 0x04
90 #define BIO_FP_APPEND 0x08
91
BIO_new_file(const char * filename,const char * mode)92 BIO *BIO_new_file(const char *filename, const char *mode) {
93 BIO *ret;
94 FILE *file;
95
96 file = fopen(filename, mode);
97 if (file == NULL) {
98 OPENSSL_PUT_SYSTEM_ERROR();
99
100 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
101 if (errno == ENOENT) {
102 OPENSSL_PUT_ERROR(BIO, BIO_R_NO_SUCH_FILE);
103 } else {
104 OPENSSL_PUT_ERROR(BIO, BIO_R_SYS_LIB);
105 }
106 return NULL;
107 }
108
109 ret = BIO_new_fp(file, BIO_CLOSE);
110 if (ret == NULL) {
111 fclose(file);
112 return NULL;
113 }
114
115 return ret;
116 }
117
BIO_new_fp(FILE * stream,int close_flag)118 BIO *BIO_new_fp(FILE *stream, int close_flag) {
119 BIO *ret = BIO_new(BIO_s_file());
120
121 if (ret == NULL) {
122 return NULL;
123 }
124
125 BIO_set_fp(ret, stream, close_flag);
126 return ret;
127 }
128
file_free(BIO * bio)129 static int file_free(BIO *bio) {
130 if (!bio->shutdown) {
131 return 1;
132 }
133
134 if (bio->init && bio->ptr != NULL) {
135 fclose(bio->ptr);
136 bio->ptr = NULL;
137 }
138 bio->init = 0;
139
140 return 1;
141 }
142
file_read(BIO * b,char * out,int outl)143 static int file_read(BIO *b, char *out, int outl) {
144 if (!b->init) {
145 return 0;
146 }
147
148 size_t ret = fread(out, 1, outl, (FILE *)b->ptr);
149 if (ret == 0 && ferror((FILE *)b->ptr)) {
150 OPENSSL_PUT_SYSTEM_ERROR();
151 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
152 return -1;
153 }
154
155 // fread reads at most |outl| bytes, so |ret| fits in an int.
156 return (int)ret;
157 }
158
file_write(BIO * b,const char * in,int inl)159 static int file_write(BIO *b, const char *in, int inl) {
160 int ret = 0;
161
162 if (!b->init) {
163 return 0;
164 }
165
166 ret = fwrite(in, inl, 1, (FILE *)b->ptr);
167 if (ret > 0) {
168 ret = inl;
169 }
170 return ret;
171 }
172
file_ctrl(BIO * b,int cmd,long num,void * ptr)173 static long file_ctrl(BIO *b, int cmd, long num, void *ptr) {
174 long ret = 1;
175 FILE *fp = (FILE *)b->ptr;
176 FILE **fpp;
177 char p[4];
178
179 switch (cmd) {
180 case BIO_CTRL_RESET:
181 num = 0;
182 OPENSSL_FALLTHROUGH;
183 case BIO_C_FILE_SEEK:
184 ret = (long)fseek(fp, num, 0);
185 break;
186 case BIO_CTRL_EOF:
187 ret = (long)feof(fp);
188 break;
189 case BIO_C_FILE_TELL:
190 case BIO_CTRL_INFO:
191 ret = ftell(fp);
192 break;
193 case BIO_C_SET_FILE_PTR:
194 file_free(b);
195 b->shutdown = (int)num & BIO_CLOSE;
196 b->ptr = ptr;
197 b->init = 1;
198 break;
199 case BIO_C_SET_FILENAME:
200 file_free(b);
201 b->shutdown = (int)num & BIO_CLOSE;
202 if (num & BIO_FP_APPEND) {
203 if (num & BIO_FP_READ) {
204 OPENSSL_strlcpy(p, "a+", sizeof(p));
205 } else {
206 OPENSSL_strlcpy(p, "a", sizeof(p));
207 }
208 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) {
209 OPENSSL_strlcpy(p, "r+", sizeof(p));
210 } else if (num & BIO_FP_WRITE) {
211 OPENSSL_strlcpy(p, "w", sizeof(p));
212 } else if (num & BIO_FP_READ) {
213 OPENSSL_strlcpy(p, "r", sizeof(p));
214 } else {
215 OPENSSL_PUT_ERROR(BIO, BIO_R_BAD_FOPEN_MODE);
216 ret = 0;
217 break;
218 }
219 fp = fopen(ptr, p);
220 if (fp == NULL) {
221 OPENSSL_PUT_SYSTEM_ERROR();
222 ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
223 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
224 ret = 0;
225 break;
226 }
227 b->ptr = fp;
228 b->init = 1;
229 break;
230 case BIO_C_GET_FILE_PTR:
231 // the ptr parameter is actually a FILE ** in this case.
232 if (ptr != NULL) {
233 fpp = (FILE **)ptr;
234 *fpp = (FILE *)b->ptr;
235 }
236 break;
237 case BIO_CTRL_GET_CLOSE:
238 ret = (long)b->shutdown;
239 break;
240 case BIO_CTRL_SET_CLOSE:
241 b->shutdown = (int)num;
242 break;
243 case BIO_CTRL_FLUSH:
244 ret = 0 == fflush((FILE *)b->ptr);
245 break;
246 case BIO_CTRL_WPENDING:
247 case BIO_CTRL_PENDING:
248 default:
249 ret = 0;
250 break;
251 }
252 return ret;
253 }
254
file_gets(BIO * bp,char * buf,int size)255 static int file_gets(BIO *bp, char *buf, int size) {
256 int ret = 0;
257
258 if (size == 0) {
259 return 0;
260 }
261
262 if (!fgets(buf, size, (FILE *)bp->ptr)) {
263 buf[0] = 0;
264 goto err;
265 }
266 ret = strlen(buf);
267
268 err:
269 return ret;
270 }
271
272 static const BIO_METHOD methods_filep = {
273 BIO_TYPE_FILE, "FILE pointer",
274 file_write, file_read,
275 NULL /* puts */, file_gets,
276 file_ctrl, NULL /* create */,
277 file_free, NULL /* callback_ctrl */,
278 };
279
BIO_s_file(void)280 const BIO_METHOD *BIO_s_file(void) { return &methods_filep; }
281
282
BIO_get_fp(BIO * bio,FILE ** out_file)283 int BIO_get_fp(BIO *bio, FILE **out_file) {
284 return BIO_ctrl(bio, BIO_C_GET_FILE_PTR, 0, (char*) out_file);
285 }
286
BIO_set_fp(BIO * bio,FILE * file,int close_flag)287 int BIO_set_fp(BIO *bio, FILE *file, int close_flag) {
288 return BIO_ctrl(bio, BIO_C_SET_FILE_PTR, close_flag, (char *) file);
289 }
290
BIO_read_filename(BIO * bio,const char * filename)291 int BIO_read_filename(BIO *bio, const char *filename) {
292 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_READ,
293 (char *)filename);
294 }
295
BIO_write_filename(BIO * bio,const char * filename)296 int BIO_write_filename(BIO *bio, const char *filename) {
297 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_WRITE,
298 (char *)filename);
299 }
300
BIO_append_filename(BIO * bio,const char * filename)301 int BIO_append_filename(BIO *bio, const char *filename) {
302 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_APPEND,
303 (char *)filename);
304 }
305
BIO_rw_filename(BIO * bio,const char * filename)306 int BIO_rw_filename(BIO *bio, const char *filename) {
307 return BIO_ctrl(bio, BIO_C_SET_FILENAME,
308 BIO_CLOSE | BIO_FP_READ | BIO_FP_WRITE, (char *)filename);
309 }
310
311 #endif // OPENSSL_TRUSTY
312