1 /* $OpenBSD: bss_file.c,v 1.34 2022/01/07 09:02:17 tb 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
93 #include "bio_local.h"
94
95 static int file_write(BIO *h, const char *buf, int num);
96 static int file_read(BIO *h, char *buf, int size);
97 static int file_puts(BIO *h, const char *str);
98 static int file_gets(BIO *h, char *str, int size);
99 static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
100 static int file_new(BIO *h);
101 static int file_free(BIO *data);
102
103 static const BIO_METHOD methods_filep = {
104 .type = BIO_TYPE_FILE,
105 .name = "FILE pointer",
106 .bwrite = file_write,
107 .bread = file_read,
108 .bputs = file_puts,
109 .bgets = file_gets,
110 .ctrl = file_ctrl,
111 .create = file_new,
112 .destroy = file_free
113 };
114
115 BIO *
BIO_new_file(const char * filename,const char * mode)116 BIO_new_file(const char *filename, const char *mode)
117 {
118 BIO *ret;
119 FILE *file = NULL;
120
121 file = fopen(filename, mode);
122
123 if (file == NULL) {
124 SYSerror(errno);
125 ERR_asprintf_error_data("fopen('%s', '%s')", filename, mode);
126 if (errno == ENOENT)
127 BIOerror(BIO_R_NO_SUCH_FILE);
128 else
129 BIOerror(ERR_R_SYS_LIB);
130 return (NULL);
131 }
132 if ((ret = BIO_new(BIO_s_file())) == NULL) {
133 fclose(file);
134 return (NULL);
135 }
136
137 BIO_set_fp(ret, file, BIO_CLOSE);
138 return (ret);
139 }
140
141 BIO *
BIO_new_fp(FILE * stream,int close_flag)142 BIO_new_fp(FILE *stream, int close_flag)
143 {
144 BIO *ret;
145
146 if ((ret = BIO_new(BIO_s_file())) == NULL)
147 return (NULL);
148
149 BIO_set_fp(ret, stream, close_flag);
150 return (ret);
151 }
152
153 const BIO_METHOD *
BIO_s_file(void)154 BIO_s_file(void)
155 {
156 return (&methods_filep);
157 }
158
159 static int
file_new(BIO * bi)160 file_new(BIO *bi)
161 {
162 bi->init = 0;
163 bi->num = 0;
164 bi->ptr = NULL;
165 bi->flags=0;
166 return (1);
167 }
168
169 static int
file_free(BIO * a)170 file_free(BIO *a)
171 {
172 if (a == NULL)
173 return (0);
174 if (a->shutdown) {
175 if ((a->init) && (a->ptr != NULL)) {
176 fclose (a->ptr);
177 a->ptr = NULL;
178 a->flags = 0;
179 }
180 a->init = 0;
181 }
182 return (1);
183 }
184
185 static int
file_read(BIO * b,char * out,int outl)186 file_read(BIO *b, char *out, int outl)
187 {
188 int ret = 0;
189
190 if (b->init && out != NULL) {
191 ret = fread(out, 1, outl, (FILE *)b->ptr);
192 if (ret == 0 && ferror((FILE *)b->ptr)) {
193 SYSerror(errno);
194 BIOerror(ERR_R_SYS_LIB);
195 ret = -1;
196 }
197 }
198 return (ret);
199 }
200
201 static int
file_write(BIO * b,const char * in,int inl)202 file_write(BIO *b, const char *in, int inl)
203 {
204 int ret = 0;
205
206 if (b->init && in != NULL)
207 ret = fwrite(in, 1, inl, (FILE *)b->ptr);
208 return (ret);
209 }
210
211 static long
file_ctrl(BIO * b,int cmd,long num,void * ptr)212 file_ctrl(BIO *b, int cmd, long num, void *ptr)
213 {
214 long ret = 1;
215 FILE *fp = (FILE *)b->ptr;
216 FILE **fpp;
217 char p[4];
218
219 switch (cmd) {
220 case BIO_C_FILE_SEEK:
221 case BIO_CTRL_RESET:
222 ret = (long)fseek(fp, num, 0);
223 break;
224 case BIO_CTRL_EOF:
225 ret = (long)feof(fp);
226 break;
227 case BIO_C_FILE_TELL:
228 case BIO_CTRL_INFO:
229 ret = ftell(fp);
230 break;
231 case BIO_C_SET_FILE_PTR:
232 file_free(b);
233 b->shutdown = (int)num&BIO_CLOSE;
234 b->ptr = ptr;
235 b->init = 1;
236 break;
237 case BIO_C_SET_FILENAME:
238 file_free(b);
239 b->shutdown = (int)num&BIO_CLOSE;
240 if (num & BIO_FP_APPEND) {
241 if (num & BIO_FP_READ)
242 strlcpy(p, "a+", sizeof p);
243 else strlcpy(p, "a", sizeof p);
244 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
245 strlcpy(p, "r+", sizeof p);
246 else if (num & BIO_FP_WRITE)
247 strlcpy(p, "w", sizeof p);
248 else if (num & BIO_FP_READ)
249 strlcpy(p, "r", sizeof p);
250 else {
251 BIOerror(BIO_R_BAD_FOPEN_MODE);
252 ret = 0;
253 break;
254 }
255 fp = fopen(ptr, p);
256 if (fp == NULL) {
257 SYSerror(errno);
258 ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p);
259 BIOerror(ERR_R_SYS_LIB);
260 ret = 0;
261 break;
262 }
263 b->ptr = fp;
264 b->init = 1;
265 break;
266 case BIO_C_GET_FILE_PTR:
267 /* the ptr parameter is actually a FILE ** in this case. */
268 if (ptr != NULL) {
269 fpp = (FILE **)ptr;
270 *fpp = (FILE *)b->ptr;
271 }
272 break;
273 case BIO_CTRL_GET_CLOSE:
274 ret = (long)b->shutdown;
275 break;
276 case BIO_CTRL_SET_CLOSE:
277 b->shutdown = (int)num;
278 break;
279 case BIO_CTRL_FLUSH:
280 fflush((FILE *)b->ptr);
281 break;
282 case BIO_CTRL_DUP:
283 ret = 1;
284 break;
285
286 case BIO_CTRL_WPENDING:
287 case BIO_CTRL_PENDING:
288 case BIO_CTRL_PUSH:
289 case BIO_CTRL_POP:
290 default:
291 ret = 0;
292 break;
293 }
294 return (ret);
295 }
296
297 static int
file_gets(BIO * bp,char * buf,int size)298 file_gets(BIO *bp, char *buf, int size)
299 {
300 int ret = 0;
301
302 buf[0] = '\0';
303 if (!fgets(buf, size,(FILE *)bp->ptr))
304 goto err;
305 if (buf[0] != '\0')
306 ret = strlen(buf);
307 err:
308 return (ret);
309 }
310
311 static int
file_puts(BIO * bp,const char * str)312 file_puts(BIO *bp, const char *str)
313 {
314 int n, ret;
315
316 n = strlen(str);
317 ret = file_write(bp, str, n);
318 return (ret);
319 }
320
321
322 #endif /* HEADER_BSS_FILE_C */
323