1 /* Copyright (C) 1995-1998 Eric Young ([email protected])
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young ([email protected]).
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 ([email protected]).
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 ([email protected])"
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 ([email protected])"
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_NO_POSIX_IO)
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 #endif
69
70 #include <openssl/err.h>
71 #include <openssl/mem.h>
72
73 #include "internal.h"
74 #include "../internal.h"
75
76
77 #if defined(OPENSSL_WINDOWS)
78 #define BORINGSSL_CLOSE _close
79 #define BORINGSSL_LSEEK _lseek
80 #define BORINGSSL_READ _read
81 #define BORINGSSL_WRITE _write
82 #else
83 #define BORINGSSL_CLOSE close
84 #define BORINGSSL_LSEEK lseek
85 #define BORINGSSL_READ read
86 #define BORINGSSL_WRITE write
87 #endif
88
BIO_new_fd(int fd,int close_flag)89 BIO *BIO_new_fd(int fd, int close_flag) {
90 BIO *ret = BIO_new(BIO_s_fd());
91 if (ret == NULL) {
92 return NULL;
93 }
94 BIO_set_fd(ret, fd, close_flag);
95 return ret;
96 }
97
fd_new(BIO * bio)98 static int fd_new(BIO *bio) {
99 // num is used to store the file descriptor.
100 bio->num = -1;
101 return 1;
102 }
103
fd_free(BIO * bio)104 static int fd_free(BIO *bio) {
105 if (bio->shutdown) {
106 if (bio->init) {
107 BORINGSSL_CLOSE(bio->num);
108 }
109 bio->init = 0;
110 }
111 return 1;
112 }
113
fd_read(BIO * b,char * out,int outl)114 static int fd_read(BIO *b, char *out, int outl) {
115 int ret = 0;
116
117 ret = (int)BORINGSSL_READ(b->num, out, outl);
118 BIO_clear_retry_flags(b);
119 if (ret <= 0) {
120 if (bio_errno_should_retry(ret)) {
121 BIO_set_retry_read(b);
122 }
123 }
124
125 return ret;
126 }
127
fd_write(BIO * b,const char * in,int inl)128 static int fd_write(BIO *b, const char *in, int inl) {
129 int ret = (int)BORINGSSL_WRITE(b->num, in, inl);
130 BIO_clear_retry_flags(b);
131 if (ret <= 0) {
132 if (bio_errno_should_retry(ret)) {
133 BIO_set_retry_write(b);
134 }
135 }
136
137 return ret;
138 }
139
fd_ctrl(BIO * b,int cmd,long num,void * ptr)140 static long fd_ctrl(BIO *b, int cmd, long num, void *ptr) {
141 long ret = 1;
142 int *ip;
143
144 switch (cmd) {
145 case BIO_CTRL_RESET:
146 num = 0;
147 OPENSSL_FALLTHROUGH;
148 case BIO_C_FILE_SEEK:
149 ret = 0;
150 if (b->init) {
151 ret = (long)BORINGSSL_LSEEK(b->num, num, SEEK_SET);
152 }
153 break;
154 case BIO_C_FILE_TELL:
155 case BIO_CTRL_INFO:
156 ret = 0;
157 if (b->init) {
158 ret = (long)BORINGSSL_LSEEK(b->num, 0, SEEK_CUR);
159 }
160 break;
161 case BIO_C_SET_FD:
162 fd_free(b);
163 b->num = *((int *)ptr);
164 b->shutdown = (int)num;
165 b->init = 1;
166 break;
167 case BIO_C_GET_FD:
168 if (b->init) {
169 ip = (int *)ptr;
170 if (ip != NULL) {
171 *ip = b->num;
172 }
173 return b->num;
174 } else {
175 ret = -1;
176 }
177 break;
178 case BIO_CTRL_GET_CLOSE:
179 ret = b->shutdown;
180 break;
181 case BIO_CTRL_SET_CLOSE:
182 b->shutdown = (int)num;
183 break;
184 case BIO_CTRL_PENDING:
185 case BIO_CTRL_WPENDING:
186 ret = 0;
187 break;
188 case BIO_CTRL_FLUSH:
189 ret = 1;
190 break;
191 default:
192 ret = 0;
193 break;
194 }
195
196 return ret;
197 }
198
fd_gets(BIO * bp,char * buf,int size)199 static int fd_gets(BIO *bp, char *buf, int size) {
200 if (size <= 0) {
201 return 0;
202 }
203
204 char *ptr = buf;
205 char *end = buf + size - 1;
206 while (ptr < end && fd_read(bp, ptr, 1) > 0) {
207 char c = ptr[0];
208 ptr++;
209 if (c == '\n') {
210 break;
211 }
212 }
213
214 ptr[0] = '\0';
215
216 // The output length is bounded by |size|.
217 return (int)(ptr - buf);
218 }
219
220 static const BIO_METHOD methods_fdp = {
221 BIO_TYPE_FD, "file descriptor", fd_write, fd_read, NULL /* puts */,
222 fd_gets, fd_ctrl, fd_new, fd_free, NULL /* callback_ctrl */,
223 };
224
BIO_s_fd(void)225 const BIO_METHOD *BIO_s_fd(void) { return &methods_fdp; }
226
227 #endif // OPENSSL_NO_POSIX_IO
228
BIO_set_fd(BIO * bio,int fd,int close_flag)229 int BIO_set_fd(BIO *bio, int fd, int close_flag) {
230 return (int)BIO_int_ctrl(bio, BIO_C_SET_FD, close_flag, fd);
231 }
232
BIO_get_fd(BIO * bio,int * out_fd)233 int BIO_get_fd(BIO *bio, int *out_fd) {
234 return (int)BIO_ctrl(bio, BIO_C_GET_FD, 0, (char *) out_fd);
235 }
236