J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | import java.net.*; |
| 25 | import java.io.*; |
| 26 | import java.util.regex.*; |
| 27 | import java.security.*; |
| 28 | import javax.net.ssl.*; |
| 29 | |
| 30 | /* |
| 31 | * This class handles one client connection. It will interpret and act on the |
| 32 | * commands (like USER, GET, PUT etc...) sent through the socket passed to |
| 33 | * the constructor. |
| 34 | * |
| 35 | * To function it needs to be provided 2 handlers, one for the filesystem |
| 36 | * and one for authentication. |
| 37 | * @see FileSystemHandler |
| 38 | * @see AuthHandler |
| 39 | * @see #setHandlers(FtpFileSystemHandler,FtpAuthHandler) |
| 40 | */ |
| 41 | |
| 42 | public class FtpCommandHandler extends Thread { |
| 43 | private FtpServer parent = null; |
| 44 | private Socket cmd = null; |
| 45 | private Socket oldCmd = null; |
| 46 | private InetAddress clientAddr = null; |
| 47 | private ServerSocket pasv = null; |
| 48 | |
| 49 | private BufferedReader in = null; |
| 50 | |
| 51 | private PrintStream out = null; |
| 52 | |
| 53 | private FtpFileSystemHandler fsh = null; |
| 54 | private FtpAuthHandler auth = null; |
| 55 | |
| 56 | private boolean done = false; |
| 57 | |
| 58 | private String username = null; |
| 59 | private String password = null; |
| 60 | private String account = null; |
| 61 | private boolean logged = false; |
| 62 | private boolean epsvAll = false; |
| 63 | private int dataPort = 0; |
| 64 | private InetAddress dataAddress = null; |
| 65 | private boolean pasvEnabled = true; |
| 66 | private boolean portEnabled = true; |
| 67 | private boolean extendedEnabled = true; |
| 68 | private boolean binary = true; |
| 69 | private String renameFrom = null; |
| 70 | private long restart = 0; |
| 71 | private boolean useCrypto = false; |
| 72 | private boolean useDataCrypto = false; |
| 73 | private SSLSocketFactory sslFact = null; |
| 74 | |
| 75 | private final int ERROR = -1; |
| 76 | private final int QUIT = 0; |
| 77 | private final int USER = 1; |
| 78 | private final int PASS = 2; |
| 79 | private final int CWD = 3; |
| 80 | private final int CDUP = 4; |
| 81 | private final int PWD = 5; |
| 82 | private final int TYPE = 6; |
| 83 | private final int NOOP = 7; |
| 84 | private final int RETR = 8; |
| 85 | private final int PORT = 9; |
| 86 | private final int PASV = 10; |
| 87 | private final int EPSV = 11; |
| 88 | private final int EPRT = 12; |
| 89 | private final int SYST = 13; |
| 90 | private final int STOR = 14; |
| 91 | private final int STOU = 15; |
| 92 | private final int LIST = 16; |
| 93 | private final int NLST = 17; |
| 94 | private final int RNFR = 18; |
| 95 | private final int RNTO = 19; |
| 96 | private final int DELE = 20; |
| 97 | private final int REST = 21; |
| 98 | private final int AUTH = 22; |
| 99 | private final int FEAT = 23; |
| 100 | private final int CCC = 24; |
| 101 | private final int PROT = 25; |
| 102 | private final int PBSZ = 26; |
| 103 | |
| 104 | private String[] commands = |
| 105 | { "QUIT", "USER", "PASS", "CWD", "CDUP", "PWD", "TYPE", "NOOP", "RETR", |
| 106 | "PORT", "PASV", "EPSV", "EPRT", "SYST", "STOR", "STOU", "LIST", "NLST", |
| 107 | "RNFR", "RNTO", "DELE", "REST", "AUTH", "FEAT", "CCC", "PROT", "PBSZ" |
| 108 | }; |
| 109 | |
| 110 | private boolean isPasvSet() { |
| 111 | if (pasv != null && !pasvEnabled) { |
| 112 | try { |
| 113 | pasv.close(); |
| 114 | } catch ( IOException e) { |
| 115 | |
| 116 | } |
| 117 | pasv = null; |
| 118 | } |
| 119 | if (pasvEnabled && pasv != null) |
| 120 | return true; |
| 121 | return false; |
| 122 | } |
| 123 | |
| 124 | private OutputStream getOutDataStream() throws IOException { |
| 125 | if (isPasvSet()) { |
| 126 | Socket s = pasv.accept(); |
| 127 | if (useCrypto && useDataCrypto) { |
| 128 | SSLSocket ssl = (SSLSocket) sslFact.createSocket(s, clientAddr.getHostName(), s.getPort(), true); |
| 129 | ssl.setUseClientMode(false); |
| 130 | s = ssl; |
| 131 | } |
| 132 | return s.getOutputStream(); |
| 133 | } |
| 134 | if (dataAddress != null) { |
| 135 | Socket s; |
| 136 | if (useCrypto) { |
| 137 | s = sslFact.createSocket(dataAddress, dataPort); |
| 138 | } else |
| 139 | s = new Socket(dataAddress, dataPort); |
| 140 | dataAddress = null; |
| 141 | dataPort = 0; |
| 142 | return s.getOutputStream(); |
| 143 | } |
| 144 | return null; |
| 145 | } |
| 146 | |
| 147 | private InputStream getInDataStream() throws IOException { |
| 148 | if (isPasvSet()) { |
| 149 | Socket s = pasv.accept(); |
| 150 | if (useCrypto && useDataCrypto) { |
| 151 | SSLSocket ssl = (SSLSocket) sslFact.createSocket(s, clientAddr.getHostName(), s.getPort(), true); |
| 152 | ssl.setUseClientMode(false); |
| 153 | s = ssl; |
| 154 | } |
| 155 | return s.getInputStream(); |
| 156 | } |
| 157 | if (dataAddress != null) { |
| 158 | Socket s; |
| 159 | if (useCrypto) { |
| 160 | s = sslFact.createSocket(dataAddress, dataPort); |
| 161 | } else |
| 162 | s = new Socket(dataAddress, dataPort); |
| 163 | dataAddress = null; |
| 164 | dataPort = 0; |
| 165 | return s.getInputStream(); |
| 166 | } |
| 167 | return null; |
| 168 | } |
| 169 | |
| 170 | private void parsePort(String port_arg) throws IOException { |
| 171 | if (epsvAll) { |
| 172 | out.println("501 PORT not allowed after EPSV ALL."); |
| 173 | return; |
| 174 | } |
| 175 | if (!portEnabled) { |
| 176 | out.println("500 PORT command is disabled, please use PASV."); |
| 177 | return; |
| 178 | } |
| 179 | StringBuffer host; |
| 180 | int i = 0, j = 4; |
| 181 | while (j > 0) { |
| 182 | i = port_arg.indexOf(',', i + 1); |
| 183 | if (i < 0) |
| 184 | break; |
| 185 | j--; |
| 186 | } |
| 187 | if (j != 0) { |
| 188 | out.println("500 '" + port_arg + "': command not understood."); |
| 189 | return; |
| 190 | } |
| 191 | try { |
| 192 | host = new StringBuffer(port_arg.substring(0, i)); |
| 193 | for (j = 0; j < host.length(); j++) |
| 194 | if (host.charAt(j) == ',') |
| 195 | host.setCharAt(j, '.'); |
| 196 | String ports = port_arg.substring(i + 1); |
| 197 | i = ports.indexOf(','); |
| 198 | dataPort = Integer.parseInt(ports.substring(0, i)) << 8; |
| 199 | dataPort += (Integer.parseInt(ports.substring(i + 1))); |
| 200 | dataAddress = InetAddress.getByName(host.toString()); |
| 201 | out.println("200 Command okay."); |
| 202 | } catch (Exception ex3) { |
| 203 | dataPort = 0; |
| 204 | dataAddress = null; |
| 205 | out.println("500 '" + port_arg + "': command not understood."); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | private void parseEprt(String arg) { |
| 210 | if (epsvAll) { |
| 211 | out.println("501 PORT not allowed after EPSV ALL"); |
| 212 | return; |
| 213 | } |
| 214 | if (!extendedEnabled || !portEnabled) { |
| 215 | out.println("500 EPRT is disabled, use PASV instead"); |
| 216 | return; |
| 217 | } |
| 218 | Pattern p = Pattern.compile("\\|(\\d)\\|(.*)\\|(\\d+)\\|"); |
| 219 | Matcher m = p.matcher(arg); |
| 220 | if (!m.find()) { |
| 221 | out.println("500 '" + arg + "': command not understood."); |
| 222 | return; |
| 223 | } |
| 224 | try { |
| 225 | dataAddress = InetAddress.getByName(m.group(2)); |
| 226 | } catch (UnknownHostException e) { |
| 227 | out.println("500 " + arg + ": invalid address."); |
| 228 | dataAddress = null; |
| 229 | return; |
| 230 | } |
| 231 | dataPort = Integer.parseInt(m.group(3)); |
| 232 | out.println("200 Command okay."); |
| 233 | } |
| 234 | |
| 235 | private void doPasv() { |
| 236 | if (!pasvEnabled) { |
| 237 | out.println("500 PASV is disabled, use PORT."); |
| 238 | return; |
| 239 | } |
| 240 | try { |
| 241 | if (pasv == null) |
| 242 | pasv = new ServerSocket(0); |
| 243 | int port = pasv.getLocalPort(); |
| 244 | InetAddress rAddress = cmd.getLocalAddress(); |
| 245 | if (rAddress instanceof Inet6Address) { |
| 246 | out.println("500 PASV illegal over IPv6 addresses, use EPSV."); |
| 247 | return; |
| 248 | } |
| 249 | byte[] a = rAddress.getAddress(); |
| 250 | out.println("227 Entering Passive Mode " + a[0] + "," + a[1] + "," + a[2] + "," + a[3] + "," + |
| 251 | (port >> 8) + "," + (port & 0xff) ); |
| 252 | } catch (IOException e) { |
| 253 | out.println("425 can't build data connection: Connection refused."); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | private void doEpsv(String arg) { |
| 258 | if (!extendedEnabled || !pasvEnabled) { |
| 259 | out.println("500 EPSV disabled, use PORT or PASV."); |
| 260 | return; |
| 261 | } |
| 262 | if ("all".equalsIgnoreCase(arg)) { |
| 263 | out.println("200 EPSV ALL Command successful."); |
| 264 | epsvAll = true; |
| 265 | return; |
| 266 | } |
| 267 | try { |
| 268 | if (pasv == null) |
| 269 | pasv = new ServerSocket(0); |
| 270 | int port = pasv.getLocalPort(); |
| 271 | out.println("229 Entering Extended Passive Mode (|||" + port + "|)"); |
| 272 | } catch (IOException e) { |
| 273 | out.println("500 Can't create data connection."); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | private void doRetr(String arg) { |
| 278 | try { |
| 279 | OutputStream dOut = getOutDataStream(); |
| 280 | if (dOut != null) { |
| 281 | InputStream dIn = fsh.getFile(arg); |
| 282 | if (dIn == null) { |
| 283 | out.println("550 File not found."); |
| 284 | dOut.close(); |
| 285 | return; |
| 286 | } |
| 287 | out.println("150 Opening " + (binary ? "BINARY " : "ASCII ") + " data connection for file " + arg + |
| 288 | "(" + fsh.getFileSize(arg) + " bytes)."); |
| 289 | if (binary) { |
| 290 | byte[] buf = new byte[2048]; |
| 291 | dOut = new BufferedOutputStream(dOut); |
| 292 | int count; |
| 293 | if (restart > 0) { |
| 294 | dIn.skip(restart); |
| 295 | restart = 0; |
| 296 | } |
| 297 | do { |
| 298 | count = dIn.read(buf); |
| 299 | if (count > 0) |
| 300 | dOut.write(buf, 0, count); |
| 301 | } while (count >= 0); |
| 302 | dOut.close(); |
| 303 | dIn.close(); |
| 304 | out.println("226 Transfer complete."); |
| 305 | } |
| 306 | } |
| 307 | } catch (IOException e) { |
| 308 | |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | private void doStor(String arg, boolean unique) { |
| 313 | try { |
| 314 | InputStream dIn = getInDataStream(); |
| 315 | if (dIn != null) { |
| 316 | OutputStream dOut = fsh.putFile(arg); |
| 317 | if (dOut == null) { |
| 318 | out.println("500 Can't create file " + arg); |
| 319 | dIn.close(); |
| 320 | return; |
| 321 | } |
| 322 | out.println("150 Opening " + (binary ? "BINARY " : "ASCII ") + " data connection for file " + arg); |
| 323 | if (binary) { |
| 324 | byte[] buf = new byte[2048]; |
| 325 | dOut = new BufferedOutputStream(dOut); |
| 326 | int count; |
| 327 | do { |
| 328 | count = dIn.read(buf); |
| 329 | if (count > 0) |
| 330 | dOut.write(buf, 0, count); |
| 331 | } while (count >= 0); |
| 332 | dOut.close(); |
| 333 | dIn.close(); |
| 334 | out.println("226 Transfer complete."); |
| 335 | } |
| 336 | } |
| 337 | } catch (IOException e) { |
| 338 | |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | private void doList() { |
| 343 | try { |
| 344 | OutputStream dOut = getOutDataStream(); |
| 345 | if (dOut != null) { |
| 346 | InputStream dIn = fsh.listCurrentDir(); |
| 347 | if (dIn == null) { |
| 348 | out.println("550 File not found."); |
| 349 | dOut.close(); |
| 350 | return; |
| 351 | } |
| 352 | out.println("150 Opening ASCII data connection for file list"); |
| 353 | byte[] buf = new byte[2048]; |
| 354 | dOut = new BufferedOutputStream(dOut); |
| 355 | int count; |
| 356 | do { |
| 357 | count = dIn.read(buf); |
| 358 | if (count > 0) |
| 359 | dOut.write(buf, 0, count); |
| 360 | } while (count >= 0); |
| 361 | dOut.close(); |
| 362 | dIn.close(); |
| 363 | out.println("226 Transfer complete."); |
| 364 | } |
| 365 | } catch (IOException e) { |
| 366 | |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | private boolean useTLS() { |
| 371 | if (sslFact == null) { |
| 372 | sslFact = (SSLSocketFactory) SSLSocketFactory.getDefault(); |
| 373 | } |
| 374 | if (sslFact == null) |
| 375 | return false; |
| 376 | return true; |
| 377 | } |
| 378 | |
| 379 | private void stopTLS() { |
| 380 | if (useCrypto) { |
| 381 | SSLSocket ssl = (SSLSocket) cmd; |
| 382 | try { |
| 383 | ssl.close(); |
| 384 | } catch (IOException e) { |
| 385 | // nada |
| 386 | } |
| 387 | cmd = oldCmd; |
| 388 | oldCmd = null; |
| 389 | try { |
| 390 | in = new BufferedReader(new InputStreamReader(cmd.getInputStream())); |
| 391 | out = new PrintStream(cmd.getOutputStream(), true, "ISO8859_1"); |
| 392 | } catch (Exception ex) { |
| 393 | |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | public void setHandlers(FtpFileSystemHandler f, FtpAuthHandler a) { |
| 399 | fsh = f; |
| 400 | auth = a; |
| 401 | } |
| 402 | |
| 403 | public FtpCommandHandler(Socket cl, FtpServer p) { |
| 404 | parent = p; |
| 405 | cmd = cl; |
| 406 | clientAddr = cl.getInetAddress(); |
| 407 | } |
| 408 | |
| 409 | public void terminate() { |
| 410 | done = true; |
| 411 | } |
| 412 | |
| 413 | private int parseCmd(StringBuffer cmd) { |
| 414 | |
| 415 | if (cmd == null || cmd.length() < 3) // Shortest command is 3 char long |
| 416 | return ERROR; |
| 417 | int blank = cmd.indexOf(" "); |
| 418 | if (blank < 0) |
| 419 | blank = cmd.length(); |
| 420 | if (blank < 3) |
| 421 | return ERROR; |
| 422 | String s = cmd.substring(0,blank); |
| 423 | cmd.delete(0, blank + 1); |
| 424 | System.out.println("parse: cmd = " + s + " arg = " +cmd.toString()); |
| 425 | for (int i = 0; i < commands.length; i++) |
| 426 | if (s.equalsIgnoreCase(commands[i])) |
| 427 | return i; |
| 428 | // Unknown command |
| 429 | return ERROR; |
| 430 | } |
| 431 | |
| 432 | private boolean checkLogged() { |
| 433 | if (!logged) { |
| 434 | out.println("530 Not logged in."); |
| 435 | return false; |
| 436 | } |
| 437 | return true; |
| 438 | } |
| 439 | |
| 440 | public void run() { |
| 441 | try { |
| 442 | // cmd.setSoTimeout(2000); |
| 443 | in = new BufferedReader(new InputStreamReader(cmd.getInputStream())); |
| 444 | out = new PrintStream(cmd.getOutputStream(), true, "ISO8859_1"); |
| 445 | out.println("220 Java FTP test server (j2se 6.0) ready."); |
| 446 | out.flush(); |
| 447 | if (auth.authType() == 0) // No auth needed |
| 448 | logged = true; |
| 449 | } catch (IOException e) { |
| 450 | e.printStackTrace(); |
| 451 | return; |
| 452 | } |
| 453 | |
| 454 | String str; |
| 455 | StringBuffer buf; |
| 456 | int res; |
| 457 | while (!done) { |
| 458 | try { |
| 459 | str = in.readLine(); |
| 460 | System.out.println("line: " + str); |
| 461 | buf = new StringBuffer(str); |
| 462 | res = parseCmd(buf); |
| 463 | switch (res) { |
| 464 | case ERROR: |
| 465 | out.println("500 '" + str +"': command not understood."); |
| 466 | break; |
| 467 | case QUIT: |
| 468 | out.println("221 Goodbye."); |
| 469 | done = true; |
| 470 | break; |
| 471 | case USER: |
| 472 | logged = false; |
| 473 | username = buf.toString(); |
| 474 | if (auth.authType() > 1) |
| 475 | out.println("331 User name okay, need password."); |
| 476 | else { |
| 477 | if (auth.authenticate(username, null)) { |
| 478 | out.println("230 User logged in, proceed."); |
| 479 | logged = true; |
| 480 | } else { |
| 481 | out.println("331 User name okay, need password."); |
| 482 | } |
| 483 | } |
| 484 | break; |
| 485 | case PASS: |
| 486 | if (logged || (username == null)) { |
| 487 | out.println("503 Login with USER first."); |
| 488 | break; |
| 489 | } |
| 490 | password = buf.toString(); |
| 491 | if (auth.authType() == 3) { |
| 492 | out.println("332 Need account for login."); |
| 493 | break; |
| 494 | } |
| 495 | if (auth.authenticate(username, password)) { |
| 496 | logged = true; |
| 497 | out.println("230 User " + username + " logged in."); |
| 498 | break; |
| 499 | } |
| 500 | out.println("530 Login incorrect."); |
| 501 | username = null; |
| 502 | break; |
| 503 | case CWD: |
| 504 | if (checkLogged()) { |
| 505 | String path = buf.toString(); |
| 506 | if (fsh.cd(path)) { |
| 507 | out.println("250 CWD command successful."); |
| 508 | } else { |
| 509 | out.println("550 " + path + ": no such file or directory."); |
| 510 | } |
| 511 | } |
| 512 | break; |
| 513 | case CDUP: |
| 514 | if (checkLogged()) { |
| 515 | if (fsh.cdUp()) |
| 516 | out.println("250 CWD command successful."); |
| 517 | else |
| 518 | out.println("550 invalid path."); |
| 519 | } |
| 520 | break; |
| 521 | case PWD: |
| 522 | if (checkLogged()) { |
| 523 | String s = fsh.pwd(); |
| 524 | out.println("257 \"" + s + "\" is current directory"); |
| 525 | } |
| 526 | break; |
| 527 | case NOOP: |
| 528 | if (checkLogged()) { |
| 529 | out.println("200 NOOP command successful."); |
| 530 | } |
| 531 | break; |
| 532 | case PORT: |
| 533 | if (checkLogged()) { |
| 534 | parsePort(buf.toString()); |
| 535 | } |
| 536 | break; |
| 537 | case EPRT: |
| 538 | if (checkLogged()) { |
| 539 | parseEprt(buf.toString()); |
| 540 | } |
| 541 | break; |
| 542 | case PASV: |
| 543 | if (checkLogged()) |
| 544 | doPasv(); |
| 545 | break; |
| 546 | case EPSV: |
| 547 | if (checkLogged()) |
| 548 | doEpsv(buf.toString()); |
| 549 | break; |
| 550 | case RETR: |
| 551 | if (checkLogged()) { |
| 552 | doRetr(buf.toString()); |
| 553 | } |
| 554 | break; |
| 555 | case SYST: |
| 556 | if (checkLogged()) { |
| 557 | out.println("215 UNIX Type: L8 Version: Java 6.0"); |
| 558 | } |
| 559 | break; |
| 560 | case TYPE: |
| 561 | if (checkLogged()) { |
| 562 | String arg = buf.toString(); |
| 563 | if (arg.length() != 1 || "AIE".indexOf(arg.charAt(0)) < 0) { |
| 564 | out.println("500 'TYPE " + arg + "' command not understood."); |
| 565 | continue; |
| 566 | } |
| 567 | out.println("200 Type set to " + buf.toString() + "."); |
| 568 | if (arg.charAt(0) == 'I') |
| 569 | binary = true; |
| 570 | else |
| 571 | binary = false; |
| 572 | } |
| 573 | break; |
| 574 | case STOR: |
| 575 | case STOU: |
| 576 | // TODO: separate STOR and STOU (Store Unique) |
| 577 | if (checkLogged()) { |
| 578 | doStor(buf.toString(), false); |
| 579 | } |
| 580 | break; |
| 581 | case LIST: |
| 582 | if (checkLogged()) { |
| 583 | doList(); |
| 584 | } |
| 585 | break; |
| 586 | case NLST: |
| 587 | // TODO: implememt |
| 588 | break; |
| 589 | case DELE: |
| 590 | if (checkLogged()) { |
| 591 | String arg = buf.toString(); |
| 592 | if (fsh.removeFile(arg)) { |
| 593 | out.println("250 file " + arg + " deleted."); |
| 594 | break; |
| 595 | } |
| 596 | out.println("550 " + arg + ": no such file or directory."); |
| 597 | } |
| 598 | break; |
| 599 | case RNFR: |
| 600 | if (checkLogged()) { |
| 601 | if (renameFrom != null) { |
| 602 | out.println("503 Bad sequence of commands."); |
| 603 | break; |
| 604 | } |
| 605 | renameFrom = buf.toString(); |
| 606 | if (fsh.fileExists(renameFrom)) { |
| 607 | out.println("350 File or directory exists, ready for destination name."); |
| 608 | } else { |
| 609 | out.println("550 " + renameFrom + ": no such file or directory"); |
| 610 | renameFrom = null; |
| 611 | } |
| 612 | } |
| 613 | break; |
| 614 | case RNTO: |
| 615 | if (checkLogged()) { |
| 616 | if (renameFrom == null) { |
| 617 | out.println("503 Bad sequence of commands."); |
| 618 | break; |
| 619 | } |
| 620 | if (fsh.rename(renameFrom, buf.toString())) { |
| 621 | out.println("250 Rename successful"); |
| 622 | } else { |
| 623 | out.println("550 Rename "); |
| 624 | } |
| 625 | renameFrom = null; |
| 626 | } |
| 627 | break; |
| 628 | case REST: |
| 629 | if (checkLogged()) { |
| 630 | String arg = buf.toString(); |
| 631 | restart = Long.parseLong(arg); |
| 632 | if (restart > 0) |
| 633 | out.println("350 Restarting at " + restart + ". Send STORE or RETRIEVE to initiate transfer"); |
| 634 | else |
| 635 | out.println("501 Syntax error in command of arguments."); |
| 636 | } |
| 637 | break; |
| 638 | case FEAT: |
| 639 | out.println("211-Features:"); |
| 640 | out.println(" REST STREAM"); |
| 641 | out.println(" PBSZ"); |
| 642 | out.println(" AUTH TLS"); |
| 643 | out.println(" PROT P"); |
| 644 | out.println(" CCC"); |
| 645 | out.println("211 End"); |
| 646 | break; |
| 647 | case AUTH: |
| 648 | if ("TLS".equalsIgnoreCase(buf.toString()) && useTLS()) { |
| 649 | out.println("234 TLS Authentication OK."); |
| 650 | out.flush(); |
| 651 | SSLSocket ssl; |
| 652 | String[] suites = sslFact.getSupportedCipherSuites(); |
| 653 | try { |
| 654 | ssl = (SSLSocket) sslFact.createSocket(cmd, cmd.getInetAddress().getHostName(), cmd.getPort(), false); |
| 655 | ssl.setUseClientMode(false); |
| 656 | ssl.setEnabledCipherSuites(suites); |
| 657 | ssl.startHandshake(); |
| 658 | } catch (IOException ioe) { |
| 659 | ioe.printStackTrace(); |
| 660 | out.println("550 Unable to create secure channel."); |
| 661 | break; |
| 662 | } |
| 663 | oldCmd = cmd; |
| 664 | cmd = ssl; |
| 665 | out = new PrintStream(cmd.getOutputStream(), true, "ISO8859_1"); |
| 666 | in = new BufferedReader(new InputStreamReader(cmd.getInputStream())); |
| 667 | System.out.println("Secure socket created!"); |
| 668 | useCrypto = true; |
| 669 | break; |
| 670 | } |
| 671 | out.println("501 Unknown or unsupported AUTH type"); |
| 672 | break; |
| 673 | case CCC: |
| 674 | out.println("200 Command OK."); |
| 675 | stopTLS(); |
| 676 | break; |
| 677 | case PROT: |
| 678 | String arg = buf.toString(); |
| 679 | if ("C".equalsIgnoreCase(arg)) { |
| 680 | // PROT C : Clear protection level |
| 681 | // No protection on data channel; |
| 682 | useDataCrypto = false; |
| 683 | out.println("200 Command OK."); |
| 684 | break; |
| 685 | } |
| 686 | if ("P".equalsIgnoreCase(arg)) { |
| 687 | // PROT P : Private protection level |
| 688 | // Data channel is integrity and confidentiality protected |
| 689 | useDataCrypto = true; |
| 690 | out.println("200 Command OK."); |
| 691 | break; |
| 692 | } |
| 693 | out.println("537 Requested PROT level not supported by security mechanism."); |
| 694 | break; |
| 695 | case PBSZ: |
| 696 | // TODO: finish |
| 697 | out.println("200 Command OK."); |
| 698 | break; |
| 699 | |
| 700 | } |
| 701 | |
| 702 | } catch (InterruptedIOException ie) { |
| 703 | // loop |
| 704 | } catch (IOException e) { |
| 705 | e.printStackTrace(); |
| 706 | return; |
| 707 | } |
| 708 | } |
| 709 | try { |
| 710 | in.close(); |
| 711 | out.close(); |
| 712 | cmd.close(); |
| 713 | } catch (IOException e) { |
| 714 | } |
| 715 | parent.removeClient(this); |
| 716 | } |
| 717 | } |