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