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diff --git a/src/lib/libcrypto/bio/bss_file.c b/src/lib/libcrypto/bio/bss_file.c
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1/* $OpenBSD: bss_file.c,v 1.35 2023/07/05 21:23:37 beck 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
95static int file_write(BIO *h, const char *buf, int num);
96static int file_read(BIO *h, char *buf, int size);
97static int file_puts(BIO *h, const char *str);
98static int file_gets(BIO *h, char *str, int size);
99static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
100static int file_new(BIO *h);
101static int file_free(BIO *data);
102
103static 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
115BIO *
116BIO_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}
140LCRYPTO_ALIAS(BIO_new_file);
141
142BIO *
143BIO_new_fp(FILE *stream, int close_flag)
144{
145 BIO *ret;
146
147 if ((ret = BIO_new(BIO_s_file())) == NULL)
148 return (NULL);
149
150 BIO_set_fp(ret, stream, close_flag);
151 return (ret);
152}
153LCRYPTO_ALIAS(BIO_new_fp);
154
155const BIO_METHOD *
156BIO_s_file(void)
157{
158 return (&methods_filep);
159}
160LCRYPTO_ALIAS(BIO_s_file);
161
162static int
163file_new(BIO *bi)
164{
165 bi->init = 0;
166 bi->num = 0;
167 bi->ptr = NULL;
168 bi->flags=0;
169 return (1);
170}
171
172static int
173file_free(BIO *a)
174{
175 if (a == NULL)
176 return (0);
177 if (a->shutdown) {
178 if ((a->init) && (a->ptr != NULL)) {
179 fclose (a->ptr);
180 a->ptr = NULL;
181 a->flags = 0;
182 }
183 a->init = 0;
184 }
185 return (1);
186}
187
188static int
189file_read(BIO *b, char *out, int outl)
190{
191 int ret = 0;
192
193 if (b->init && out != NULL) {
194 ret = fread(out, 1, outl, (FILE *)b->ptr);
195 if (ret == 0 && ferror((FILE *)b->ptr)) {
196 SYSerror(errno);
197 BIOerror(ERR_R_SYS_LIB);
198 ret = -1;
199 }
200 }
201 return (ret);
202}
203
204static int
205file_write(BIO *b, const char *in, int inl)
206{
207 int ret = 0;
208
209 if (b->init && in != NULL)
210 ret = fwrite(in, 1, inl, (FILE *)b->ptr);
211 return (ret);
212}
213
214static long
215file_ctrl(BIO *b, int cmd, long num, void *ptr)
216{
217 long ret = 1;
218 FILE *fp = (FILE *)b->ptr;
219 FILE **fpp;
220 char p[4];
221
222 switch (cmd) {
223 case BIO_C_FILE_SEEK:
224 case BIO_CTRL_RESET:
225 ret = (long)fseek(fp, num, 0);
226 break;
227 case BIO_CTRL_EOF:
228 ret = (long)feof(fp);
229 break;
230 case BIO_C_FILE_TELL:
231 case BIO_CTRL_INFO:
232 ret = ftell(fp);
233 break;
234 case BIO_C_SET_FILE_PTR:
235 file_free(b);
236 b->shutdown = (int)num&BIO_CLOSE;
237 b->ptr = ptr;
238 b->init = 1;
239 break;
240 case BIO_C_SET_FILENAME:
241 file_free(b);
242 b->shutdown = (int)num&BIO_CLOSE;
243 if (num & BIO_FP_APPEND) {
244 if (num & BIO_FP_READ)
245 strlcpy(p, "a+", sizeof p);
246 else strlcpy(p, "a", sizeof p);
247 } else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
248 strlcpy(p, "r+", sizeof p);
249 else if (num & BIO_FP_WRITE)
250 strlcpy(p, "w", sizeof p);
251 else if (num & BIO_FP_READ)
252 strlcpy(p, "r", sizeof p);
253 else {
254 BIOerror(BIO_R_BAD_FOPEN_MODE);
255 ret = 0;
256 break;
257 }
258 fp = fopen(ptr, p);
259 if (fp == NULL) {
260 SYSerror(errno);
261 ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p);
262 BIOerror(ERR_R_SYS_LIB);
263 ret = 0;
264 break;
265 }
266 b->ptr = fp;
267 b->init = 1;
268 break;
269 case BIO_C_GET_FILE_PTR:
270 /* the ptr parameter is actually a FILE ** in this case. */
271 if (ptr != NULL) {
272 fpp = (FILE **)ptr;
273 *fpp = (FILE *)b->ptr;
274 }
275 break;
276 case BIO_CTRL_GET_CLOSE:
277 ret = (long)b->shutdown;
278 break;
279 case BIO_CTRL_SET_CLOSE:
280 b->shutdown = (int)num;
281 break;
282 case BIO_CTRL_FLUSH:
283 fflush((FILE *)b->ptr);
284 break;
285 case BIO_CTRL_DUP:
286 ret = 1;
287 break;
288
289 case BIO_CTRL_WPENDING:
290 case BIO_CTRL_PENDING:
291 case BIO_CTRL_PUSH:
292 case BIO_CTRL_POP:
293 default:
294 ret = 0;
295 break;
296 }
297 return (ret);
298}
299
300static int
301file_gets(BIO *bp, char *buf, int size)
302{
303 int ret = 0;
304
305 buf[0] = '\0';
306 if (!fgets(buf, size,(FILE *)bp->ptr))
307 goto err;
308 if (buf[0] != '\0')
309 ret = strlen(buf);
310err:
311 return (ret);
312}
313
314static int
315file_puts(BIO *bp, const char *str)
316{
317 int n, ret;
318
319 n = strlen(str);
320 ret = file_write(bp, str, n);
321 return (ret);
322}
323
324
325#endif /* HEADER_BSS_FILE_C */
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