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