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
open_file(const char * filename,const char * mode)90 static FILE *open_file(const char *filename, const char *mode) {
91 #if defined(OPENSSL_WINDOWS) && defined(CP_UTF8)
92 int sz, len_0 = (int)strlen(filename) + 1;
93 DWORD flags;
94
95 /* Basically there are three cases to cover: a) filename is pure ASCII
96 * string; b) actual UTF-8 encoded string and c) locale-ized string, i.e. one
97 * containing 8-bit characters that are meaningful in current system locale.
98 * If filename is pure ASCII or real UTF-8 encoded string,
99 * MultiByteToWideChar succeeds and _wfopen works. If filename is locale-ized
100 * string, chances are that MultiByteToWideChar fails reporting
101 * ERROR_NO_UNICODE_TRANSLATION, in which case we fall back to fopen... */
102 if ((sz = MultiByteToWideChar(CP_UTF8, (flags = MB_ERR_INVALID_CHARS),
103 filename, len_0, NULL, 0)) > 0 ||
104 (GetLastError() == ERROR_INVALID_FLAGS &&
105 (sz = MultiByteToWideChar(CP_UTF8, (flags = 0), filename, len_0, NULL,
106 0)) > 0)) {
107 WCHAR wmode[8];
108 WCHAR *wfilename = _alloca(sz * sizeof(WCHAR));
109
110 if (MultiByteToWideChar(CP_UTF8, flags, filename, len_0, wfilename, sz) &&
111 MultiByteToWideChar(CP_UTF8, 0, mode, strlen(mode) + 1, wmode,
112 sizeof(wmode) / sizeof(wmode[0])) &&
113 (file = _wfopen(wfilename, wmode)) == NULL &&
114 (errno == ENOENT ||
115 errno == EBADF)) /* UTF-8 decode succeeded, but no file, filename
116 * could still have been locale-ized... */
117 return fopen(filename, mode);
118 } else if (GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {
119 return fopen(filename, mode);
120 }
121 #else
122 return fopen(filename, mode);
123 #endif
124 }
125
BIO_new_file(const char * filename,const char * mode)126 BIO *BIO_new_file(const char *filename, const char *mode) {
127 BIO *ret;
128 FILE *file;
129
130 file = open_file(filename, mode);
131 if (file == NULL) {
132 OPENSSL_PUT_SYSTEM_ERROR();
133
134 ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");
135 if (errno == ENOENT) {
136 OPENSSL_PUT_ERROR(BIO, BIO_R_NO_SUCH_FILE);
137 } else {
138 OPENSSL_PUT_ERROR(BIO, BIO_R_SYS_LIB);
139 }
140 return NULL;
141 }
142
143 ret = BIO_new(BIO_s_file());
144 if (ret == NULL) {
145 fclose(file);
146 return NULL;
147 }
148
149 BIO_set_fp(ret, file, BIO_CLOSE);
150 return ret;
151 }
152
BIO_new_fp(FILE * stream,int close_flag)153 BIO *BIO_new_fp(FILE *stream, int close_flag) {
154 BIO *ret = BIO_new(BIO_s_file());
155
156 if (ret == NULL) {
157 return NULL;
158 }
159
160 BIO_set_fp(ret, stream, close_flag);
161 return ret;
162 }
163
file_new(BIO * bio)164 static int file_new(BIO *bio) { return 1; }
165
file_free(BIO * bio)166 static int file_free(BIO *bio) {
167 if (bio == NULL) {
168 return 0;
169 }
170
171 if (!bio->shutdown) {
172 return 1;
173 }
174
175 if (bio->init && bio->ptr != NULL) {
176 fclose(bio->ptr);
177 bio->ptr = NULL;
178 }
179 bio->init = 0;
180
181 return 1;
182 }
183
file_read(BIO * b,char * out,int outl)184 static int file_read(BIO *b, char *out, int outl) {
185 if (!b->init) {
186 return 0;
187 }
188
189 size_t ret = fread(out, 1, outl, (FILE *)b->ptr);
190 if (ret == 0 && ferror((FILE *)b->ptr)) {
191 OPENSSL_PUT_SYSTEM_ERROR();
192 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
193 return -1;
194 }
195
196 /* fread reads at most |outl| bytes, so |ret| fits in an int. */
197 return (int)ret;
198 }
199
file_write(BIO * b,const char * in,int inl)200 static int file_write(BIO *b, const char *in, int inl) {
201 int ret = 0;
202
203 if (!b->init) {
204 return 0;
205 }
206
207 ret = fwrite(in, inl, 1, (FILE *)b->ptr);
208 if (ret > 0) {
209 ret = inl;
210 }
211 return ret;
212 }
213
file_ctrl(BIO * b,int cmd,long num,void * ptr)214 static long file_ctrl(BIO *b, int cmd, long num, void *ptr) {
215 long ret = 1;
216 FILE *fp = (FILE *)b->ptr;
217 FILE **fpp;
218 char p[4];
219
220 switch (cmd) {
221 case BIO_CTRL_RESET:
222 num = 0;
223 case BIO_C_FILE_SEEK:
224 ret = (long)fseek(fp, num, 0);
225 break;
226 case BIO_CTRL_EOF:
227 ret = (long)feof(fp);
228 break;
229 case BIO_C_FILE_TELL:
230 case BIO_CTRL_INFO:
231 ret = ftell(fp);
232 break;
233 case BIO_C_SET_FILE_PTR:
234 file_free(b);
235 b->shutdown = (int)num & BIO_CLOSE;
236 b->ptr = ptr;
237 b->init = 1;
238 break;
239 case BIO_C_SET_FILENAME:
240 file_free(b);
241 b->shutdown = (int)num & BIO_CLOSE;
242 if (num & BIO_FP_APPEND) {
243 if (num & BIO_FP_READ) {
244 BUF_strlcpy(p, "a+", sizeof(p));
245 } else {
246 BUF_strlcpy(p, "a", sizeof(p));
247 }
248 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE)) {
249 BUF_strlcpy(p, "r+", sizeof(p));
250 } else if (num & BIO_FP_WRITE) {
251 BUF_strlcpy(p, "w", sizeof(p));
252 } else if (num & BIO_FP_READ) {
253 BUF_strlcpy(p, "r", sizeof(p));
254 } else {
255 OPENSSL_PUT_ERROR(BIO, BIO_R_BAD_FOPEN_MODE);
256 ret = 0;
257 break;
258 }
259 fp = open_file(ptr, p);
260 if (fp == NULL) {
261 OPENSSL_PUT_SYSTEM_ERROR();
262 ERR_add_error_data(5, "fopen('", ptr, "','", p, "')");
263 OPENSSL_PUT_ERROR(BIO, ERR_R_SYS_LIB);
264 ret = 0;
265 break;
266 }
267 b->ptr = fp;
268 b->init = 1;
269 break;
270 case BIO_C_GET_FILE_PTR:
271 /* the ptr parameter is actually a FILE ** in this case. */
272 if (ptr != NULL) {
273 fpp = (FILE **)ptr;
274 *fpp = (FILE *)b->ptr;
275 }
276 break;
277 case BIO_CTRL_GET_CLOSE:
278 ret = (long)b->shutdown;
279 break;
280 case BIO_CTRL_SET_CLOSE:
281 b->shutdown = (int)num;
282 break;
283 case BIO_CTRL_FLUSH:
284 ret = 0 == fflush((FILE *)b->ptr);
285 break;
286 case BIO_CTRL_WPENDING:
287 case BIO_CTRL_PENDING:
288 default:
289 ret = 0;
290 break;
291 }
292 return ret;
293 }
294
file_gets(BIO * bp,char * buf,int size)295 static int file_gets(BIO *bp, char *buf, int size) {
296 int ret = 0;
297
298 if (size == 0) {
299 return 0;
300 }
301
302 if (!fgets(buf, size, (FILE *)bp->ptr)) {
303 buf[0] = 0;
304 goto err;
305 }
306 ret = strlen(buf);
307
308 err:
309 return ret;
310 }
311
file_puts(BIO * bp,const char * str)312 static int file_puts(BIO *bp, const char *str) {
313 return file_write(bp, str, strlen(str));
314 }
315
316 static const BIO_METHOD methods_filep = {
317 BIO_TYPE_FILE, "FILE pointer", file_write, file_read, file_puts,
318 file_gets, file_ctrl, file_new, file_free, NULL, };
319
BIO_s_file(void)320 const BIO_METHOD *BIO_s_file(void) { return &methods_filep; }
321
322
BIO_get_fp(BIO * bio,FILE ** out_file)323 int BIO_get_fp(BIO *bio, FILE **out_file) {
324 return BIO_ctrl(bio, BIO_C_GET_FILE_PTR, 0, (char*) out_file);
325 }
326
BIO_set_fp(BIO * bio,FILE * file,int close_flag)327 int BIO_set_fp(BIO *bio, FILE *file, int close_flag) {
328 return BIO_ctrl(bio, BIO_C_SET_FILE_PTR, close_flag, (char *) file);
329 }
330
BIO_read_filename(BIO * bio,const char * filename)331 int BIO_read_filename(BIO *bio, const char *filename) {
332 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_READ,
333 (char *)filename);
334 }
335
BIO_write_filename(BIO * bio,const char * filename)336 int BIO_write_filename(BIO *bio, const char *filename) {
337 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_WRITE,
338 (char *)filename);
339 }
340
BIO_append_filename(BIO * bio,const char * filename)341 int BIO_append_filename(BIO *bio, const char *filename) {
342 return BIO_ctrl(bio, BIO_C_SET_FILENAME, BIO_CLOSE | BIO_FP_APPEND,
343 (char *)filename);
344 }
345
BIO_rw_filename(BIO * bio,const char * filename)346 int BIO_rw_filename(BIO *bio, const char *filename) {
347 return BIO_ctrl(bio, BIO_C_SET_FILENAME,
348 BIO_CLOSE | BIO_FP_READ | BIO_FP_WRITE, (char *)filename);
349 }
350