1<?php 2 3$socket = null; 4$errno = 0; 5$context = stream_context_create(array('ssl' => array('local_cert' => dirname(__FILE__).'/cert.pem', 'passphrase' => 'pass'))); 6 7for ($i=0; $i<10 && !$socket; ++$i) { 8 $port = rand(50000, 65535); 9 10 $socket = stream_socket_server("tcp://127.0.0.1:$port", $errno, $errstr, STREAM_SERVER_BIND|STREAM_SERVER_LISTEN, $context); 11} 12//set anther random port that is not the same as $port 13do{ 14 $pasv_port = rand(50000, 65535); 15}while($pasv_port == $port); 16 17if (!$socket) { 18 die("could not start/bind the ftp server\n"); 19} 20 21 22 23 24$pid = pcntl_fork(); 25 26 27 28function pasv_listen($action){ 29 global $pasv_port, $tmp_file; 30 $tmp_file = 'nm2.php'; 31 $pid = pcntl_fork(); 32 if($pid === 0){ 33 $soc = stream_socket_server("tcp://127.0.0.1:$pasv_port"); 34 $fs = stream_socket_accept($soc, 3); 35 switch ($action) { 36 case 'fget': 37 case 'get': 38 //listen for 3 seconds 3 seconds 39 fputs($fs, "I am passive.\r\n"); 40 break; 41 case 'put': 42 file_put_contents($tmp_file, stream_get_contents($fs)); 43 break; 44 case 'list': 45 fputs($fs, "drwxr-x--- 3 owner group 4096 Jul 12 12:16 .\r\n"); 46 fputs($fs, "drwxr-x--- 3 owner group 4096 Jul 12 12:16 ..\r\n"); 47 fputs($fs, "drwxr-x--- 3 owner group 4096 Jul 12 12:16 public_ftp\r\n"); 48 break; 49 case 'list_null': 50 fputs($fs, "\r\n"); 51 break; 52 } 53 fclose($fs); 54 exit; 55 } 56} 57 58 59 60if ($pid) { 61 62 function dump_and_exit($buf) 63 { 64 var_dump($buf); 65 fclose($GLOBALS['s']); 66 exit; 67 } 68 69 function anonymous() 70 { 71 return $GLOBALS['user'] === 'anonymous'; 72 } 73 74 /* quick&dirty realpath() like function */ 75 function change_dir($dir) 76 { 77 global $cwd; 78 79 if ($dir[0] == '/') { 80 $cwd = $dir; 81 return; 82 } 83 84 $cwd = "$cwd/$dir"; 85 86 do { 87 $old = $cwd; 88 $cwd = preg_replace('@/?[^/]+/\.\.@', '', $cwd); 89 } while ($old != $cwd); 90 91 $cwd = strtr($cwd, array('//' => '/')); 92 if (!$cwd) $cwd = '/'; 93 } 94 95 $s = stream_socket_accept($socket); 96 97 if (!$s) die("Error accepting a new connection\n"); 98 99 fputs($s, "220----- PHP FTP server 0.3 -----\r\n220 Service ready\r\n"); 100 $buf = fread($s, 2048); 101 102 103 function user_auth($buf) { 104 global $user, $s, $ssl, $bug37799; 105 106 if (!empty($ssl)) { 107 if ($buf !== "AUTH TLS\r\n") { 108 fputs($s, "500 Syntax error, command unrecognized.\r\n"); 109 dump_and_exit($buf); 110 } 111 112 if (empty($bug37799)) { 113 fputs($s, "234 auth type accepted\r\n"); 114 } else { 115 fputs($s, "666 dummy\r\n"); 116 fputs($s, "666 bogus msg\r\n"); 117 exit; 118 } 119 120 if (!stream_socket_enable_crypto($s, true, STREAM_CRYPTO_METHOD_SSLv23_SERVER)) { 121 die("SSLv23 handshake failed.\n"); 122 } 123 124 if (!preg_match('/^PBSZ \d+\r\n$/', $buf = fread($s, 2048))) { 125 fputs($s, "501 bogus data\r\n"); 126 dump_and_exit($buf); 127 } 128 129 fputs($s, "200 OK\r\n"); 130 $buf = fread($s, 2048); 131 132 if ($buf !== "PROT P\r\n") { 133 fputs($s, "504 Wrong protection.\r\n"); 134 dump_and_exit($buf); 135 } 136 137 fputs($s, "200 OK\r\n"); 138 139 $buf = fread($s, 2048); 140 } 141 142 if (!preg_match('/^USER (\w+)\r\n$/', $buf, $m)) { 143 fputs($s, "500 Syntax error, command unrecognized.\r\n"); 144 dump_and_exit($buf); 145 } 146 $user = $m[1]; 147 if ($user !== 'user' && $user !== 'anonymous') { 148 fputs($s, "530 Not logged in.\r\n"); 149 fclose($s); 150 exit; 151 } 152 153 if (anonymous()) { 154 fputs($s, "230 Anonymous user logged in\r\n"); 155 156 } else { 157 fputs($s, "331 User name ok, need password\r\n"); 158 159 if (!preg_match('/^PASS (\w+)\r\n$/', $buf = fread($s, 100), $m)) { 160 fputs($s, "500 Syntax error, command unrecognized.\r\n"); 161 dump_and_exit($buf); 162 } 163 164 $pass = $m[1]; 165 if ($pass === 'pass') { 166 fputs($s, "230 User logged in\r\n"); 167 } else { 168 fputs($s, "530 Not logged in.\r\n"); 169 fclose($s); 170 exit; 171 } 172 } 173 } 174 175 user_auth($buf); 176 177 $cwd = '/'; 178 $num_bogus_cmds = 0; 179 180 while($buf = fread($s, 4098)) { 181 if (!empty($bogus)) { 182 fputs($s, "502 Command not implemented (".$num_bogus_cmds++.").\r\n"); 183 184 } else if ($buf === "HELP\r\n") { 185 fputs($s, "214-There is help available for the following commands:\r\n"); 186 fputs($s, " USER\r\n"); 187 fputs($s, " HELP\r\n"); 188 fputs($s, "214 end of list\r\n"); 189 190 } elseif ($buf === "HELP HELP\r\n") { 191 fputs($s, "214 Syntax: HELP [<SP> <string>] <CRLF>\r\n"); 192 193 } elseif ($buf === "PWD\r\n") { 194 fputs($s, "257 \"$cwd\" is current directory.\r\n"); 195 196 } elseif ($buf === "CDUP\r\n") { 197 change_dir('..'); 198 fputs($s, "250 CDUP command successful.\r\n"); 199 200 } elseif ($buf === "SYST\r\n") { 201 if (isset($bug27809)) { 202 fputs($s, "215 OS/400 is the remote operating system. The TCP/IP version is \"V5R2M0\"\r\n"); 203 } else { 204 fputs($s, "215 UNIX Type: L8.\r\n"); 205 } 206 207 } elseif ($buf === "TYPE A\r\n") { 208 $ascii = true; 209 fputs($s, "200 OK\r\n"); 210 211 } elseif ($buf === "TYPE I\r\n") { 212 $ascii = false; 213 fputs($s, "200 OK\r\n"); 214 215 } elseif ($buf === "QUIT\r\n") { 216 break; 217 218 } elseif (preg_match("~^PORT (\d+),(\d+),(\d+),(\d+),(\d+),(\d+)\r\n$~", $buf, $m)) { 219 $host = "$m[1].$m[2].$m[3].$m[4]"; 220 $port = ((int)$m[5] << 8) + (int)$m[6]; 221 fputs($s, "200 OK.\r\n"); 222 223 } elseif (preg_match("~^STOR ([\w/.-]+)\r\n$~", $buf, $m)) { 224 fputs($s, "150 File status okay; about to open data connection\r\n"); 225 226 if(empty($pasv)) 227 { 228 if (!$fs = stream_socket_client("tcp://$host:$port")) { 229 fputs($s, "425 Can't open data connection\r\n"); 230 continue; 231 } 232 233 $data = stream_get_contents($fs); 234 $orig = file_get_contents(dirname(__FILE__).'/'.$m[1]); 235 236 237 if (isset($ascii) && !$ascii && $orig === $data) { 238 fputs($s, "226 Closing data Connection.\r\n"); 239 240 } elseif ((!empty($ascii) || isset($bug39583)) && $data === strtr($orig, array("\r\n" => "\n", "\r" => "\n", "\n" => "\r\n"))) { 241 fputs($s, "226 Closing data Connection.\r\n"); 242 243 } else { 244 var_dump($data); 245 var_dump($orig); 246 fputs($s, "552 Requested file action aborted.\r\n"); 247 } 248 fclose($fs); 249 }else{ 250 $data = file_get_contents('nm2.php'); 251 $orig = file_get_contents(dirname(__FILE__).'/'.$m[1]); 252 if ( $orig === $data) { 253 fputs($s, "226 Closing data Connection.\r\n"); 254 255 } else { 256 var_dump($data); 257 var_dump($orig); 258 fputs($s, "552 Requested file action aborted.\r\n"); 259 } 260 } 261 262 } elseif (preg_match("~^CWD ([A-Za-z./]+)\r\n$~", $buf, $m)) { 263 change_dir($m[1]); 264 fputs($s, "250 CWD command successful.\r\n"); 265 266 } elseif (preg_match("~^NLST(?: ([A-Za-z./]+))?\r\n$~", $buf, $m)) { 267 268 if (isset($m[1]) && $m[1] === 'bogusdir') { 269 fputs($s, "250 $m[1]: No such file or directory\r\n"); 270 continue; 271 } 272 273 // there are some servers that don't open the ftp-data socket if there's nothing to send 274 if (isset($bug39458) && isset($m[1]) && $m[1] === 'emptydir') { 275 fputs($s, "226 Transfer complete.\r\n"); 276 continue; 277 } 278 279 fputs($s, "150 File status okay; about to open data connection\r\n"); 280 281 if (!$fs = stream_socket_client("tcp://$host:$port")) { 282 fputs($s, "425 Can't open data connection\r\n"); 283 continue; 284 } 285 286 if (empty($m[1]) || $m[1] !== 'emptydir') { 287 fputs($fs, "file1\r\nfile1\r\nfile\nb0rk\r\n"); 288 } 289 290 fputs($s, "226 Closing data Connection.\r\n"); 291 fclose($fs); 292 293 } elseif (preg_match("~^MKD ([A-Za-z./]+)\r\n$~", $buf, $m)) { 294 if (isset($bug7216)) { 295 fputs($s, "257 OK.\r\n"); 296 } else { 297 fputs($s, "257 \"/path/to/ftproot$cwd$m[1]\" created.\r\n"); 298 } 299 300 } elseif (preg_match('/^USER /', $buf)) { 301 user_auth($buf); 302 303 } elseif (preg_match('/^MDTM ([\w\h]+)/', $buf, $matches)) { 304 switch ($matches [1]){ 305 case "A": 306 fputs($s, "213 19980615100045.014\r\n"); 307 break; 308 case "B": 309 fputs($s, "213 19980615100045.014\r\n"); 310 break; 311 case "C": 312 fputs($s, "213 19980705132316\r\n"); 313 break; 314 case "19990929043300 File6": 315 fputs($s, "213 19991005213102\r\n"); 316 break; 317 default : 318 fputs($s, "550 No file named \"{$matches [1]}\"\r\n"); 319 break; 320 } 321 }elseif (preg_match('/^RETR ([\w\h]+)/', $buf, $matches)) { 322 if(!empty($pasv)){ 323 ; 324 } 325 else if (!$fs = stream_socket_client("tcp://$host:$port")) { 326 fputs($s, "425 Can't open data connection\r\n"); 327 continue; 328 } 329 330 switch($matches[1]){ 331 332 case "pasv": 333 fputs($s, "150 File status okay; about to open data connection.\r\n"); 334 //the data connection is handled in another forked process 335 // called from outside this while loop 336 fputs($s, "226 Closing data Connection.\r\n"); 337 break; 338 case "a story": 339 fputs($s, "150 File status okay; about to open data connection.\r\n"); 340 fputs($fs, "For sale: baby shoes, never worn.\r\n"); 341 fputs($s, "226 Closing data Connection.\r\n"); 342 break; 343 case "binary data": 344 fputs($s, "150 File status okay; about to open data connection.\r\n"); 345 $transfer_type = $ascii? 'ASCII' : 'BINARY' ; 346 fputs($fs, $transfer_type."Foo\0Bar\r\n"); 347 fputs($s, "226 Closing data Connection.\r\n"); 348 break; 349 case "fget": 350 fputs($s, "150 File status okay; about to open data connection.\r\n"); 351 $transfer_type = $ascii? 'ASCII' : 'BINARY' ; 352 fputs($fs, $transfer_type."FooBar\r\n"); 353 fputs($s, "226 Closing data Connection.\r\n"); 354 break; 355 case "fgetresume": 356 fputs($s, "150 File status okay; about to open data connection.\r\n"); 357 $transfer_type = $ascii? 'ASCII' : 'BINARY' ; 358 fputs($fs, "Bar\r\n"); 359 fputs($s, "226 Closing data Connection.\r\n"); 360 break; 361 default: 362 fputs($s, "550 {$matches[1]}: No such file or directory \r\n"); 363 break; 364 } 365 if(isset($fs)) 366 fclose($fs); 367 368 369 }elseif (preg_match('/^PASV/', $buf, $matches)) { 370 $port = $pasv_port; 371 $p2 = $port % ((int) 1 << 8); 372 $p1 = ($port-$p2)/((int) 1 << 8); 373 $host = "127.0.0.1"; 374 fputs($s, "227 Entering Passive Mode. (127,0,0,1,{$p1},{$p2})\r\n"); 375 376 377 } elseif (preg_match('/^SITE EXEC/', $buf, $matches)) { 378 fputs($s, "200 OK\r\n"); 379 380 } elseif (preg_match('/^RMD/', $buf, $matches)) { 381 fputs($s, "250 OK\r\n"); 382 383 } elseif (preg_match('/^SITE CHMOD/', $buf, $matches)) { 384 fputs($s, "200 OK\r\n"); 385 386 } elseif (preg_match('/^ALLO (\d+)/', $buf, $matches)) { 387 fputs($s, "200 " . $matches[1] . " bytes allocated\r\n"); 388 389 }elseif (preg_match('/^LIST www\//', $buf, $matches)) { 390 fputs($s, "150 Opening ASCII mode data connection for file list\r\n"); 391 fputs($s, "226 Transfer complete\r\n"); 392 393 }elseif (preg_match('/^LIST no_exists\//', $buf, $matches)) { 394 fputs($s, "425 Error establishing connection\r\n"); 395 396 }elseif (preg_match('/^REST \d+/', $buf, $matches)) { 397 fputs($s, "350 OK\r\n"); 398 } 399 400 else { 401 fputs($s, "500 Syntax error, command unrecognized.\r\n"); 402 dump_and_exit($buf); 403 } 404 } 405 fclose($s); 406 exit; 407} 408 409fclose($socket); 410?>
