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 */
70 #ifndef _FILE_OFFSET_BITS
71 #define _FILE_OFFSET_BITS 64
72 #endif
73 #endif
74
75 #include <openssl/bio.h>
76
77 #include <errno.h>
78 #include <stdio.h>
79 #include <string.h>
80
81 #include <openssl/buf.h>
82 #include <openssl/err.h>
83 #include <openssl/mem.h>
84
85
86 #define BIO_FP_READ 0x02
87 #define BIO_FP_WRITE 0x04
88 #define BIO_FP_APPEND 0x08
89
BIO_new_file(const char * filename,const char * mode)90 BIO *BIO_new_file(const char *filename, const char *mode) {
91 BIO *ret;
92 FILE *file;
93
94 file = fopen(filename, mode);
95 if (file == NULL) {
96 OPENSSL_PUT_SYSTEM_ERROR();
97
98 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
99 if (errno == ENOENT) {
100 OPENSSL_PUT_ERROR(BIO, BIO_R_NO_SUCH_FILE);
101 } else {
102 OPENSSL_PUT_ERROR(BIO, BIO_R_SYS_LIB);
103 }
104 return NULL;
105 }
106
107 ret = BIO_new(BIO_s_file());
108 if (ret == NULL) {
109 fclose(file);
110 return NULL;
111 }
112
113 BIO_set_fp(ret, file, BIO_CLOSE);
114 return ret;
115 }
116
BIO_new_fp(FILE * stream,int close_flag)117 BIO *BIO_new_fp(FILE *stream, int close_flag) {
118 BIO *ret = BIO_new(BIO_s_file());
119
120 if (ret == NULL) {
121 return NULL;
122 }
123
124 BIO_set_fp(ret, stream, close_flag);
125 return ret;
126 }
127
file_new(BIO * bio)128 static int file_new(BIO *bio) { return 1; }
129
file_free(BIO * bio)130 static int file_free(BIO *bio) {
131 if (bio == NULL) {
132 return 0;
133 }
134
135 if (!bio->shutdown) {
136 return 1;
137 }
138
139 if (bio->init && bio->ptr != NULL) {
140 fclose(bio->ptr);
141 bio->ptr = NULL;
142 }
143 bio->init = 0;
144
145 return 1;
146 }
147
file_read(BIO * b,char * out,int outl)148 static int file_read(BIO *b, char *out, int outl) {
149 if (!b->init) {
150 return 0;
151 }
152
153 size_t ret = fread(out, 1, outl, (FILE *)b->ptr);
154 if (ret == 0 && ferror((FILE *)b->ptr)) {
155 OPENSSL_PUT_SYSTEM_ERROR();
156 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
157 return -1;
158 }
159
160 /* fread reads at most |outl| bytes, so |ret| fits in an int. */
161 return (int)ret;
162 }
163
file_write(BIO * b,const char * in,int inl)164 static int file_write(BIO *b, const char *in, int inl) {
165 int ret = 0;
166
167 if (!b->init) {
168 return 0;
169 }
170
171 ret = fwrite(in, inl, 1, (FILE *)b->ptr);
172 if (ret > 0) {
173 ret = inl;
174 }
175 return ret;
176 }
177
file_ctrl(BIO * b,int cmd,long num,void * ptr)178 static long file_ctrl(BIO *b, int cmd, long num, void *ptr) {
179 long ret = 1;
180 FILE *fp = (FILE *)b->ptr;
181 FILE **fpp;
182 char p[4];
183
184 switch (cmd) {
185 case BIO_CTRL_RESET:
186 num = 0;
187 case BIO_C_FILE_SEEK:
188 ret = (long)fseek(fp, num, 0);
189 break;
190 case BIO_CTRL_EOF:
191 ret = (long)feof(fp);
192 break;
193 case BIO_C_FILE_TELL:
194 case BIO_CTRL_INFO:
195 ret = ftell(fp);
196 break;
197 case BIO_C_SET_FILE_PTR:
198 file_free(b);
199 b->shutdown = (int)num & BIO_CLOSE;
200 b->ptr = ptr;
201 b->init = 1;
202 break;
203 case BIO_C_SET_FILENAME:
204 file_free(b);
205 b->shutdown = (int)num & BIO_CLOSE;
206 if (num & BIO_FP_APPEND) {
207 if (num & BIO_FP_READ) {
208 BUF_strlcpy(p, "a+", sizeof(p));
209 } else {
210 BUF_strlcpy(p, "a", sizeof(p));
211 }
212 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) {
213 BUF_strlcpy(p, "r+", sizeof(p));
214 } else if (num & BIO_FP_WRITE) {
215 BUF_strlcpy(p, "w", sizeof(p));
216 } else if (num & BIO_FP_READ) {
217 BUF_strlcpy(p, "r", sizeof(p));
218 } else {
219 OPENSSL_PUT_ERROR(BIO, BIO_R_BAD_FOPEN_MODE);
220 ret = 0;
221 break;
222 }
223 fp = fopen(ptr, p);
224 if (fp == NULL) {
225 OPENSSL_PUT_SYSTEM_ERROR();
226 ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
227 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
228 ret = 0;
229 break;
230 }
231 b->ptr = fp;
232 b->init = 1;
233 break;
234 case BIO_C_GET_FILE_PTR:
235 /* the ptr parameter is actually a FILE ** in this case. */
236 if (ptr != NULL) {
237 fpp = (FILE **)ptr;
238 *fpp = (FILE *)b->ptr;
239 }
240 break;
241 case BIO_CTRL_GET_CLOSE:
242 ret = (long)b->shutdown;
243 break;
244 case BIO_CTRL_SET_CLOSE:
245 b->shutdown = (int)num;
246 break;
247 case BIO_CTRL_FLUSH:
248 ret = 0 == fflush((FILE *)b->ptr);
249 break;
250 case BIO_CTRL_WPENDING:
251 case BIO_CTRL_PENDING:
252 default:
253 ret = 0;
254 break;
255 }
256 return ret;
257 }
258
file_gets(BIO * bp,char * buf,int size)259 static int file_gets(BIO *bp, char *buf, int size) {
260 int ret = 0;
261
262 if (size == 0) {
263 return 0;
264 }
265
266 if (!fgets(buf, size, (FILE *)bp->ptr)) {
267 buf[0] = 0;
268 goto err;
269 }
270 ret = strlen(buf);
271
272 err:
273 return ret;
274 }
275
276 static const BIO_METHOD methods_filep = {
277 BIO_TYPE_FILE, "FILE pointer",
278 file_write, file_read,
279 NULL /* puts */, file_gets,
280 file_ctrl, file_new,
281 file_free, NULL /* callback_ctrl */,
282 };
283
BIO_s_file(void)284 const BIO_METHOD *BIO_s_file(void) { return &methods_filep; }
285
286
BIO_get_fp(BIO * bio,FILE ** out_file)287 int BIO_get_fp(BIO *bio, FILE **out_file) {
288 return BIO_ctrl(bio, BIO_C_GET_FILE_PTR, 0, (char*) out_file);
289 }
290
BIO_set_fp(BIO * bio,FILE * file,int close_flag)291 int BIO_set_fp(BIO *bio, FILE *file, int close_flag) {
292 return BIO_ctrl(bio, BIO_C_SET_FILE_PTR, close_flag, (char *) file);
293 }
294
BIO_read_filename(BIO * bio,const char * filename)295 int BIO_read_filename(BIO *bio, const char *filename) {
296 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_READ,
297 (char *)filename);
298 }
299
BIO_write_filename(BIO * bio,const char * filename)300 int BIO_write_filename(BIO *bio, const char *filename) {
301 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_WRITE,
302 (char *)filename);
303 }
304
BIO_append_filename(BIO * bio,const char * filename)305 int BIO_append_filename(BIO *bio, const char *filename) {
306 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_APPEND,
307 (char *)filename);
308 }
309
BIO_rw_filename(BIO * bio,const char * filename)310 int BIO_rw_filename(BIO *bio, const char *filename) {
311 return BIO_ctrl(bio, BIO_C_SET_FILENAME,
312 BIO_CLOSE | BIO_FP_READ | BIO_FP_WRITE, (char *)filename);
313 }
314