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 #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 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) 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 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 123 124 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 } 132 133 static int fd_new(BIO *bio) { 134 /* num is used to store the file descriptor. */ 135 bio->num = -1; 136 return 1; 137 } 138 139 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 } 152 153 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 } 166 167 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 } 178 179 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 b->num; 212 } else { 213 ret = -1; 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 } 236 237 static int fd_puts(BIO *bp, const char *str) { 238 return fd_write(bp, str, strlen(str)); 239 } 240 241 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, }; 261 262 const BIO_METHOD *BIO_s_fd(void) { return &methods_fdp; } 263 264 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 } 267 268 int BIO_get_fd(BIO *bio, int *out_fd) { 269 return BIO_ctrl(bio, BIO_C_GET_FD, 0, (char *) out_fd); 270 } 271
