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