1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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> 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 123 124 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 } 130 131 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 } 139 140 static int fd_new(BIO *bio) { 141 /* num is used to store the file descriptor. */ 142 bio->num = -1; 143 return 1; 144 } 145 146 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 } 159 160 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 } 173 174 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 } 185 186 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 } 243 244 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 }; 265 266 const BIO_METHOD *BIO_s_fd(void) { return &methods_fdp; } 267 268 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 } 271 272 int BIO_get_fd(BIO *bio, int *out_fd) { 273 return BIO_ctrl(bio, BIO_C_GET_FD, 0, (char *) out_fd); 274 } 275
