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#include <openssl/bio.h>
58
59#if !defined(OPENSSL_TRUSTY)
60
61#include <errno.h>
62#include <string.h>
63
64#if !defined(OPENSSL_WINDOWS)
65#include <unistd.h>
66#else
67#include <io.h>
68OPENSSL_MSVC_PRAGMA(warning(push, 3))
69#include <windows.h>
70OPENSSL_MSVC_PRAGMA(warning(pop))
71#endif
72
73#include <openssl/buf.h>
74#include <openssl/err.h>
75#include <openssl/mem.h>
76
77#include "internal.h"
78#include "../internal.h"
79
80
81static int bio_fd_non_fatal_error(int err) {
82 if (
83#ifdef EWOULDBLOCK
84 err == EWOULDBLOCK ||
85#endif
86#ifdef WSAEWOULDBLOCK
87 err == WSAEWOULDBLOCK ||
88#endif
89#ifdef ENOTCONN
90 err == ENOTCONN ||
91#endif
92#ifdef EINTR
93 err == EINTR ||
94#endif
95#ifdef EAGAIN
96 err == EAGAIN ||
97#endif
98#ifdef EPROTO
99 err == EPROTO ||
100#endif
101#ifdef EINPROGRESS
102 err == EINPROGRESS ||
103#endif
104#ifdef EALREADY
105 err == EALREADY ||
106#endif
107 0) {
108 return 1;
109 }
110 return 0;
111}
112
113#if defined(OPENSSL_WINDOWS)
114 #define BORINGSSL_ERRNO (int)GetLastError()
115 #define BORINGSSL_CLOSE _close
116 #define BORINGSSL_LSEEK _lseek
117 #define BORINGSSL_READ _read
118 #define BORINGSSL_WRITE _write
119#else
120 #define BORINGSSL_ERRNO errno
121 #define BORINGSSL_CLOSE close
122 #define BORINGSSL_LSEEK lseek
123 #define BORINGSSL_READ read
124 #define BORINGSSL_WRITE write
125#endif
126
127int bio_fd_should_retry(int i) {
128 if (i == -1) {
129 return bio_fd_non_fatal_error(BORINGSSL_ERRNO);
130 }
131 return 0;
132}
133
134BIO *BIO_new_fd(int fd, int close_flag) {
135 BIO *ret = BIO_new(BIO_s_fd());
136 if (ret == NULL) {
137 return NULL;
138 }
139 BIO_set_fd(ret, fd, close_flag);
140 return ret;
141}
142
143static int fd_new(BIO *bio) {
144 // num is used to store the file descriptor.
145 bio->num = -1;
146 return 1;
147}
148
149static int fd_free(BIO *bio) {
150 if (bio == NULL) {
151 return 0;
152 }
153
154 if (bio->shutdown) {
155 if (bio->init) {
156 BORINGSSL_CLOSE(bio->num);
157 }
158 bio->init = 0;
159 }
160 return 1;
161}
162
163static int fd_read(BIO *b, char *out, int outl) {
164 int ret = 0;
165
166 ret = BORINGSSL_READ(b->num, out, outl);
167 BIO_clear_retry_flags(b);
168 if (ret <= 0) {
169 if (bio_fd_should_retry(ret)) {
170 BIO_set_retry_read(b);
171 }
172 }
173
174 return ret;
175}
176
177static int fd_write(BIO *b, const char *in, int inl) {
178 int ret = BORINGSSL_WRITE(b->num, in, inl);
179 BIO_clear_retry_flags(b);
180 if (ret <= 0) {
181 if (bio_fd_should_retry(ret)) {
182 BIO_set_retry_write(b);
183 }
184 }
185
186 return ret;
187}
188
189static long fd_ctrl(BIO *b, int cmd, long num, void *ptr) {
190 long ret = 1;
191 int *ip;
192
193 switch (cmd) {
194 case BIO_CTRL_RESET:
195 num = 0;
196 OPENSSL_FALLTHROUGH;
197 case BIO_C_FILE_SEEK:
198 ret = 0;
199 if (b->init) {
200 ret = (long)BORINGSSL_LSEEK(b->num, num, SEEK_SET);
201 }
202 break;
203 case BIO_C_FILE_TELL:
204 case BIO_CTRL_INFO:
205 ret = 0;
206 if (b->init) {
207 ret = (long)BORINGSSL_LSEEK(b->num, 0, SEEK_CUR);
208 }
209 break;
210 case BIO_C_SET_FD:
211 fd_free(b);
212 b->num = *((int *)ptr);
213 b->shutdown = (int)num;
214 b->init = 1;
215 break;
216 case BIO_C_GET_FD:
217 if (b->init) {
218 ip = (int *)ptr;
219 if (ip != NULL) {
220 *ip = b->num;
221 }
222 return b->num;
223 } else {
224 ret = -1;
225 }
226 break;
227 case BIO_CTRL_GET_CLOSE:
228 ret = b->shutdown;
229 break;
230 case BIO_CTRL_SET_CLOSE:
231 b->shutdown = (int)num;
232 break;
233 case BIO_CTRL_PENDING:
234 case BIO_CTRL_WPENDING:
235 ret = 0;
236 break;
237 case BIO_CTRL_FLUSH:
238 ret = 1;
239 break;
240 default:
241 ret = 0;
242 break;
243 }
244
245 return ret;
246}
247
248static int fd_gets(BIO *bp, char *buf, int size) {
249 char *ptr = buf;
250 char *end = buf + size - 1;
251
252 if (size <= 0) {
253 return 0;
254 }
255
256 while (ptr < end && fd_read(bp, ptr, 1) > 0 && ptr[0] != '\n') {
257 ptr++;
258 }
259
260 ptr[0] = '\0';
261
262 return ptr - buf;
263}
264
265static const BIO_METHOD methods_fdp = {
266 BIO_TYPE_FD, "file descriptor", fd_write, fd_read, NULL /* puts */,
267 fd_gets, fd_ctrl, fd_new, fd_free, NULL /* callback_ctrl */,
268};
269
270const BIO_METHOD *BIO_s_fd(void) { return &methods_fdp; }
271
272int BIO_set_fd(BIO *bio, int fd, int close_flag) {
273 return BIO_int_ctrl(bio, BIO_C_SET_FD, close_flag, fd);
274}
275
276int BIO_get_fd(BIO *bio, int *out_fd) {
277 return BIO_ctrl(bio, BIO_C_GET_FD, 0, (char *) out_fd);
278}
279
280#endif // OPENSSL_TRUSTY
281