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