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