1 // Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
9 import org.bouncycastle.util.encoders.Base64;
10 import org.bouncycastle.crypto.digests.*;
13 * This object encapsulates a *single* HTTP connection. Multiple requests may be pipelined over a connection (thread-safe),
14 * although any IOException encountered in a request will invalidate all later requests.
18 /** the URL as passed to the original constructor; this is never changed */
19 final String originalUrl;
21 /** the URL to connect to; this is munged when the url is parsed */
24 /** the host to connect to */
27 /** the port to connect on */
30 /** true if SSL (HTTPS) should be used */
33 /** the path (URI) to retrieve on the server */
39 /** the socket's inputstream */
40 InputStream in = null;
42 /** the username and password portions of the URL */
43 String userInfo = null;
45 /** cache of userInfo strings, keyed on originalUrl */
46 private static Hashtable authCache = new Hashtable();
48 /** this is null if the current request is the first request on
49 * this HTTP connection; otherwise it is a Semaphore which will be
50 * released once the request ahead of us has recieved its response
52 Semaphore okToRecieve = null;
54 /** true iff this is the first request to be made on this socket */
55 boolean firstRequest = true;
57 /** cache for resolveAndCheckIfFirewalled() */
58 static Hashtable resolvedHosts = new Hashtable();
60 /** true iff we are allowed to skip the resolve check (only allowed when we're downloading the PAC script) */
61 boolean skipResolveCheck = false;
63 /** true iff we're using a proxy */
64 boolean proxied = false;
67 // Public Methods ////////////////////////////////////////////////////////////////////////////////////////
69 public HTTP(String url) { this(url, false); }
70 public HTTP(String url, boolean skipResolveCheck) {
72 this.skipResolveCheck = skipResolveCheck;
75 /** Performs an HTTP GET request */
76 public InputStream GET() throws IOException { return makeRequest(null, null); }
78 /** Performs an HTTP POST request; content is appended to the headers (so it should include a blank line to delimit the beginning of the body) */
79 public InputStream POST(String contentType, String content) throws IOException { return makeRequest(contentType, content); }
82 * This method isn't synchronized; however, only one thread can be in the inner synchronized block at a time, and the rest of
83 * the method is protected by in-order one-at-a-time semaphore lock-steps
85 private InputStream makeRequest(String contentType, String content) throws IOException {
87 // Step 1: send the request and establish a semaphore to stop any requests that pipeline after us
88 Semaphore blockOn = null;
89 Semaphore releaseMe = null;
93 sendRequest(contentType, content);
94 } catch (IOException e) {
98 blockOn = okToRecieve;
99 releaseMe = okToRecieve = new Semaphore();
102 // Step 2: wait for requests ahead of us to complete, then read the reply off the stream
103 boolean doRelease = true;
105 if (blockOn != null) blockOn.block();
107 // previous call wrecked the socket connection, but we already sent our request, so we can't just retry --
108 // this could cause the server to receive the request twice, which could be bad (think of the case where the
109 // server call causes Amazon.com to ship you an item with one-click purchasing).
111 throw new HTTPException("a previous pipelined call messed up the socket");
113 Hashtable h = in == null ? null : parseHeaders(in);
115 if (firstRequest) throw new HTTPException("server closed the socket with no response");
116 // sometimes the server chooses to close the stream between requests
119 return makeRequest(contentType, content);
122 String reply = h.get("STATUSLINE").toString();
124 if (reply.startsWith("407") || reply.startsWith("401")) {
126 if (reply.startsWith("407")) doProxyAuth(h, content == null ? "GET" : "POST");
127 else doWebAuth(h, content == null ? "GET" : "POST");
129 if (h.get("HTTP").equals("1.0") && h.get("content-length") == null) {
130 if (Log.on) Log.log(this, "proxy returned an HTTP/1.0 reply with no content-length...");
133 int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
134 new HTTPInputStream(in, cl, releaseMe).close();
137 return makeRequest(contentType, content);
139 } else if (reply.startsWith("2")) {
140 if (h.get("HTTP").equals("1.0") && h.get("content-length") == null)
141 throw new HTTPException("XWT does not support HTTP/1.0 servers which fail to return the Content-Length header");
142 int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
143 InputStream ret = new HTTPInputStream(in, cl, releaseMe);
144 if ("gzip".equals(h.get("content-encoding"))) ret = new java.util.zip.GZIPInputStream(ret);
149 throw new HTTPException("HTTP Error: " + reply);
153 } catch (IOException e) { reset(); throw e;
154 } finally { if (doRelease) releaseMe.release();
159 // Safeguarded DNS Resolver ///////////////////////////////////////////////////////////////////////////
162 * resolves the hostname and returns it as a string in the form "x.y.z.w"
163 * @throws HTTPException if the host falls within a firewalled netblock
165 private void resolveAndCheckIfFirewalled(String host) throws HTTPException {
168 if (resolvedHosts.get(host) != null) return;
170 // if all scripts are trustworthy (local FS), continue
171 if (Main.originAddr == null) return;
175 InetAddress addr = InetAddress.getByName(host);
176 byte[] quadbyte = addr.getAddress();
177 if ((quadbyte[0] == 10 ||
178 (quadbyte[0] == 192 && quadbyte[1] == 168) ||
179 (quadbyte[0] == 172 && (quadbyte[1] & 0xF0) == 16)) && !addr.equals(Main.originAddr))
180 throw new HTTPException("security violation: " + host + " [" + addr.getHostAddress() + "] is in a firewalled netblock");
182 } catch (UnknownHostException uhe) { }
184 if (Platform.detectProxy() == null)
185 throw new HTTPException("could not resolve hostname \"" + host + "\" and no proxy configured");
189 // Methods to attempt socket creation /////////////////////////////////////////////////////////////////
191 private Socket getSocket(String host, int port, boolean ssl, boolean negotiate) throws IOException {
192 Socket ret = ssl ? new TinySSL(host, port, negotiate) : new Socket(java.net.InetAddress.getByName(host), port);
193 ret.setTcpNoDelay(true);
198 /** Attempts a direct connection */
199 public Socket attemptDirect() {
201 if (Log.verbose) Log.log(this, "attempting to create unproxied socket to " + host + ":" + port + (ssl ? " [ssl]" : ""));
202 return getSocket(host, port, ssl, true);
203 } catch (IOException e) {
204 if (Log.on) Log.log(this, "exception in attemptDirect(): " + e);
209 /** Attempts to use an HTTP proxy, employing the CONNECT method if HTTPS is requested */
210 public Socket attemptHttpProxy(String proxyHost, int proxyPort) {
212 if (Log.verbose) Log.log(this, "attempting to create HTTP proxied socket using proxy " + proxyHost + ":" + proxyPort);
214 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
216 if (!path.startsWith("http://")) path = "http://" + host + ":" + port + path;
218 PrintWriter pw = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
219 BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
220 pw.print("CONNECT " + host + ":" + port + " HTTP/1.1\r\n\r\n");
222 String s = br.readLine();
223 if (s.charAt(9) != '2') throw new HTTPException("proxy refused CONNECT method: \"" + s + "\"");
224 while (br.readLine().length() > 0) { };
225 ((TinySSL)sock).negotiate();
229 } catch (IOException e) {
230 if (Log.on) Log.log(this, "exception in attemptHttpProxy(): " + e);
236 * Implements SOCKSv4 with v4a DNS extension
237 * @see http://www.socks.nec.com/protocol/socks4.protocol
238 * @see http://www.socks.nec.com/protocol/socks4a.protocol
240 public Socket attemptSocksProxy(String proxyHost, int proxyPort) {
242 // even if host is already a "x.y.z.w" string, we use this to parse it into bytes
243 InetAddress addr = null;
244 try { addr = InetAddress.getByName(host); } catch (Exception e) { }
246 if (Log.verbose) Log.log(this, "attempting to create SOCKSv4" + (addr == null ? "" : "a") +
247 " proxied socket using proxy " + proxyHost + ":" + proxyPort);
250 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
252 DataOutputStream dos = new DataOutputStream(sock.getOutputStream());
253 dos.writeByte(0x04); // SOCKSv4(a)
254 dos.writeByte(0x01); // CONNECT
255 dos.writeShort(port & 0xffff); // port
256 if (addr == null) dos.writeInt(0x00000001); // bogus IP
257 else dos.write(addr.getAddress()); // actual IP
258 dos.writeByte(0x00); // no userid
260 PrintWriter pw = new PrintWriter(new OutputStreamWriter(dos));
263 dos.writeByte(0x00); // hostname null terminator
267 DataInputStream dis = new DataInputStream(sock.getInputStream());
268 dis.readByte(); // reply version
269 byte success = dis.readByte(); // success/fail
270 dis.skip(6); // ip/port
272 if ((int)(success & 0xff) == 90) {
273 if (ssl) ((TinySSL)sock).negotiate();
276 if (Log.on) Log.log(this, "SOCKS server denied access, code " + (success & 0xff));
279 } catch (IOException e) {
280 if (Log.on) Log.log(this, "exception in attemptSocksProxy(): " + e);
285 /** executes the PAC script and dispatches a call to one of the other attempt methods based on the result */
286 public Socket attemptPAC(org.xwt.js.JSCallable pacFunc) {
287 if (Log.verbose) Log.log(this, "evaluating PAC script");
290 org.xwt.js.JSArray args = new org.xwt.js.JSArray();
291 args.addElement(url.toString());
292 args.addElement(url.getHost());
293 Object obj = pacFunc.call(null, args);
294 if (Log.verbose) Log.log(this, " PAC script returned \"" + obj + "\"");
295 pac = obj.toString();
296 } catch (Throwable e) {
297 if (Log.on) Log.log(this, "PAC script threw exception " + e);
301 StringTokenizer st = new StringTokenizer(pac, ";", false);
302 while (st.hasMoreTokens()) {
303 String token = st.nextToken().trim();
304 if (Log.verbose) Log.log(this, " trying \"" + token + "\"...");
307 if (token.startsWith("DIRECT"))
308 ret = attemptDirect();
309 else if (token.startsWith("PROXY"))
310 ret = attemptHttpProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
311 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
312 else if (token.startsWith("SOCKS"))
313 ret = attemptSocksProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
314 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
315 if (ret != null) return ret;
316 } catch (Throwable e) {
317 if (Log.on) Log.log(this, "attempt at \"" + token + "\" failed due to " + e + "; trying next token");
320 if (Log.on) Log.log(this, "all PAC results exhausted");
325 // Everything Else ////////////////////////////////////////////////////////////////////////////
327 private synchronized void connect() throws IOException {
328 if (originalUrl.equals("stdio:")) {
329 in = new BufferedInputStream(System.in);
333 if (in == null) in = new BufferedInputStream(sock.getInputStream());
336 // grab the userinfo; gcj doesn't have java.net.URL.getUserInfo()
337 String url = originalUrl;
338 userInfo = url.substring(url.indexOf("://") + 3);
339 userInfo = userInfo.indexOf('/') == -1 ? userInfo : userInfo.substring(0, userInfo.indexOf('/'));
340 if (userInfo.indexOf('@') != -1) {
341 userInfo = userInfo.substring(0, userInfo.indexOf('@'));
342 url = url.substring(0, url.indexOf("://") + 3) + url.substring(url.indexOf('@') + 1);
347 if (url.startsWith("https:")) {
348 this.url = new URL("http" + url.substring(5));
350 } else if (!url.startsWith("http:")) {
351 throw new MalformedURLException("HTTP only supports http/https urls");
353 this.url = new URL(url);
355 if (!skipResolveCheck) resolveAndCheckIfFirewalled(this.url.getHost());
356 port = this.url.getPort();
357 path = this.url.getFile();
358 if (port == -1) port = ssl ? 443 : 80;
359 host = this.url.getHost();
360 if (Log.verbose) Log.log(this, "creating HTTP object for connection to " + host + ":" + port);
362 Proxy pi = Platform.detectProxy();
365 for(int i=0; i<pi.excluded.length; i++) if (host.equals(pi.excluded[i])) break OUTER;
366 if (sock == null && pi.proxyAutoConfigJSFunction != null) sock = attemptPAC(pi.proxyAutoConfigJSFunction);
367 if (sock == null && ssl && pi.httpsProxyHost != null) sock = attemptHttpProxy(pi.httpsProxyHost, pi.httpsProxyPort);
368 if (sock == null && pi.httpProxyHost != null) sock = attemptHttpProxy(pi.httpProxyHost, pi.httpProxyPort);
369 if (sock == null && pi.socksProxyHost != null) sock = attemptSocksProxy(pi.socksProxyHost, pi.socksProxyPort);
372 proxied = sock != null;
373 if (sock == null) sock = attemptDirect();
374 if (sock == null) throw new HTTPException("unable to contact host " + host);
375 if (in == null) in = new BufferedInputStream(sock.getInputStream());
378 public void sendRequest(String contentType, String content) throws IOException {
380 PrintWriter pw = new PrintWriter(new OutputStreamWriter(originalUrl.equals("stdio:") ? System.out : sock.getOutputStream()));
381 if (content != null) {
382 pw.print("POST " + path + " HTTP/1.1\r\n");
383 int contentLength = content.substring(0, 2).equals("\r\n") ?
384 content.length() - 2 :
385 (content.length() - content.indexOf("\r\n\r\n") - 4);
386 pw.print("Content-Length: " + contentLength + "\r\n");
387 if (contentType != null) pw.print("Content-Type: " + contentType + "\r\n");
389 pw.print("GET " + path + " HTTP/1.1\r\n");
392 pw.print("User-Agent: XWT\r\n");
393 pw.print("Accept-encoding: gzip\r\n");
394 pw.print("Host: " + (host + (port == 80 ? "" : (":" + port))) + "\r\n");
395 if (proxied) pw.print("X-RequestOrigin: " + Main.originHost + "\r\n");
397 if (Proxy.Authorization.authorization != null) pw.print("Proxy-Authorization: " + Proxy.Authorization.authorization2 + "\r\n");
398 if (authCache.get(originalUrl) != null) pw.print("Authorization: " + authCache.get(originalUrl) + "\r\n");
400 pw.print(content == null ? "\r\n" : content);
405 private void doWebAuth(Hashtable h0, String method) throws IOException {
406 if (userInfo == null) throw new HTTPException("web server demanded username/password, but none were supplied");
407 Hashtable h = parseAuthenticationChallenge(h0.get("www-authenticate").toString());
409 if (h.get("AUTHTYPE").equals("Basic")) {
410 if (authCache.get(originalUrl) != null) throw new HTTPException("username/password rejected");
411 authCache.put(originalUrl, "Basic " + new String(Base64.encode(userInfo.getBytes("US-ASCII"))));
413 } else if (h.get("AUTHTYPE").equals("Digest")) {
414 if (authCache.get(originalUrl) != null && !"true".equals(h.get("stale"))) throw new HTTPException("username/password rejected");
416 if (path2.startsWith("http://") || path2.startsWith("https://")) {
417 path2 = path2.substring(path2.indexOf("://") + 3);
418 path2 = path2.substring(path2.indexOf('/'));
420 String A1 = userInfo.substring(0, userInfo.indexOf(':')) + ":" + h.get("realm") + ":" + userInfo.substring(userInfo.indexOf(':') + 1);
421 String A2 = method + ":" + path2;
422 authCache.put(originalUrl,
424 "username=\"" + userInfo.substring(0, userInfo.indexOf(':')) + "\", " +
425 "realm=\"" + h.get("realm") + "\", " +
426 "nonce=\"" + h.get("nonce") + "\", " +
427 "uri=\"" + path2 + "\", " +
428 (h.get("opaque") == null ? "" : ("opaque=\"" + h.get("opaque") + "\", ")) +
429 "response=\"" + H(H(A1) + ":" + h.get("nonce") + ":" + H(A2)) + "\", " +
434 throw new HTTPException("unknown authentication type: " + h.get("AUTHTYPE"));
438 private void doProxyAuth(Hashtable h0, String method) throws IOException {
439 if (Log.on) Log.log(this, "Proxy AuthChallenge: " + h0.get("proxy-authenticate"));
440 Hashtable h = parseAuthenticationChallenge(h0.get("proxy-authenticate").toString());
441 String style = h.get("AUTHTYPE").toString();
442 String realm = (String)h.get("realm");
444 if (style.equals("NTLM") && Proxy.Authorization.authorization2 == null) {
445 Log.log(this, "Proxy identified itself as NTLM, sending Type 1 packet");
446 Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(Proxy.NTLM.type1);
450 if (!realm.equals("Digest") || Proxy.Authorization.authorization2 == null || !"true".equals(h.get("stale")))
451 Proxy.Authorization.getPassword(realm, style, sock.getInetAddress().getHostAddress(), Proxy.Authorization.authorization);
453 if (style.equals("Basic")) {
454 Proxy.Authorization.authorization2 =
455 "Basic " + new String(Base64.encode(Proxy.Authorization.authorization.getBytes("US-ASCII")));
457 } else if (style.equals("Digest")) {
458 String A1 = Proxy.Authorization.authorization.substring(0, userInfo.indexOf(':')) + ":" + h.get("realm") + ":" +
459 Proxy.Authorization.authorization.substring(Proxy.Authorization.authorization.indexOf(':') + 1);
460 String A2 = method + ":" + path;
461 Proxy.Authorization.authorization2 =
463 "username=\"" + Proxy.Authorization.authorization.substring(0, Proxy.Authorization.authorization.indexOf(':')) + "\", " +
464 "realm=\"" + h.get("realm") + "\", " +
465 "nonce=\"" + h.get("nonce") + "\", " +
466 "uri=\"" + path + "\", " +
467 (h.get("opaque") == null ? "" : ("opaque=\"" + h.get("opaque") + "\", ")) +
468 "response=\"" + H(H(A1) + ":" + h.get("nonce") + ":" + H(A2)) + "\", " +
471 } else if (style.equals("NTLM")) {
472 Log.log(this, "Proxy identified itself as NTLM, got Type 2 packet");
473 byte[] type2 = Base64.decode(((String)h0.get("proxy-authenticate")).substring(5).trim());
474 for(int i=0; i<type2.length; i += 4) {
476 if (i<type2.length) log += Integer.toString(type2[i] & 0xff, 16) + " ";
477 if (i+1<type2.length) log += Integer.toString(type2[i+1] & 0xff, 16) + " ";
478 if (i+2<type2.length) log += Integer.toString(type2[i+2] & 0xff, 16) + " ";
479 if (i+3<type2.length) log += Integer.toString(type2[i+3] & 0xff, 16) + " ";
482 // FEATURE: need to keep the connection open between type1 and type3
483 // FEATURE: finish this
484 //byte[] type3 = Proxy.NTLM.getResponse(
485 //Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(type3));
490 // HTTPException ///////////////////////////////////////////////////////////////////////////////////
492 static class HTTPException extends IOException { public HTTPException(String s) { super(s); } }
495 // HTTPInputStream ///////////////////////////////////////////////////////////////////////////////////
497 /** An input stream that represents a subset of a longer input stream. Supports HTTP chunking as well */
498 public class HTTPInputStream extends FilterInputStream implements KnownLength {
500 /** if chunking, the number of bytes remaining in this subset; otherwise the remainder of the chunk */
501 private int length = 0;
503 /** this semaphore will be released when the stream is closed */
504 private Semaphore releaseMe = null;
506 /** indicates that we have encountered the zero-length terminator chunk */
507 boolean chunkedDone = false;
509 /** if we're on the first chunk, we don't pre-read a CRLF */
510 boolean firstChunk = true;
512 /** the length of the entire content body; -1 if chunked */
513 private int contentLength = 0;
514 public int getContentLength() { return contentLength; }
516 HTTPInputStream(InputStream in, int length, Semaphore releaseMe) throws IOException {
518 this.releaseMe = releaseMe;
519 this.contentLength = length;
520 this.length = length == -1 ? 0 : length;
523 public int getLength() { return contentLength; }
524 public boolean markSupported() { return false; }
525 public int read(byte[] b) throws IOException { return read(b, 0, b.length); }
526 public long skip(long n) throws IOException { return read(null, -1, (int)n); }
527 public int available() throws IOException {
528 if (contentLength == -1) return java.lang.Math.min(super.available(), length);
529 return super.available();
532 public int read() throws IOException {
533 byte[] b = new byte[1];
534 int ret = read(b, 0, 1);
535 return ret == -1 ? -1 : b[0] & 0xff;
538 private void readChunk() throws IOException {
539 if (chunkedDone) return;
540 if (!firstChunk) super.skip(2); // CRLF
542 String chunkLen = "";
544 int i = super.read();
545 if (i == -1) throw new HTTPException("encountered end of stream while reading chunk length");
547 // FEATURE: handle chunking extensions
555 length = Integer.parseInt(chunkLen.trim(), 16);
556 if (length == 0) chunkedDone = true;
559 public int read(byte[] b, int off, int len) throws IOException {
560 boolean good = false;
562 if (length == 0 && contentLength == -1) {
564 if (chunkedDone) { good = true; return -1; }
566 if (length == 0) { good = true; return -1; }
568 if (len > length) len = length;
569 int ret = b == null ? (int)super.skip(len) : super.read(b, off, len);
580 public void close() throws IOException {
581 if (contentLength == -1) {
582 while(!chunkedDone) {
583 if (length != 0) skip(length);
588 if (length != 0) skip(length);
590 if (releaseMe != null) releaseMe.release();
601 // Misc Helpers ///////////////////////////////////////////////////////////////////////////////////
603 /** reads a set of HTTP headers off of the input stream, returning null if the stream is already at its end */
604 private Hashtable parseHeaders(InputStream in) throws IOException {
605 Hashtable ret = new Hashtable();
607 // we can't use a BufferedReader directly on the input stream, since it will buffer past the end of the headers
608 byte[] buf = new byte[4096];
611 int read = in.read();
612 if (read == -1 && buflen == 0) return null;
613 if (read == -1) throw new HTTPException("stream closed while reading headers");
614 buf[buflen++] = (byte)read;
615 if (buflen >= 4 && buf[buflen - 4] == '\r' && buf[buflen - 3] == '\n' && buf[buflen - 2] == '\r' && buf[buflen - 1] == '\n') break;
616 if (buflen == buf.length) {
617 byte[] newbuf = new byte[buf.length * 2];
618 System.arraycopy(buf, 0, newbuf, 0, buflen);
623 BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(buf, 0, buflen)));
624 String s = br.readLine();
625 if (!s.startsWith("HTTP/")) throw new HTTPException("Expected reply to start with \"HTTP/\", got: " + s);
626 ret.put("STATUSLINE", s.substring(s.indexOf(' ') + 1));
627 ret.put("HTTP", s.substring(5, s.indexOf(' ')));
629 while((s = br.readLine()) != null && s.length() > 0) {
630 String front = s.substring(0, s.indexOf(':')).toLowerCase();
631 String back = s.substring(s.indexOf(':') + 1).trim();
632 // ugly hack: we never replace a Digest-auth with a Basic-auth (proxy + www)
633 if (front.endsWith("-authenticate") && ret.get(front) != null && !back.equals("Digest")) continue;
634 ret.put(front, back);
639 private Hashtable parseAuthenticationChallenge(String s) {
640 Hashtable ret = new Hashtable();
643 ret.put("AUTHTYPE", s.substring(0, s.indexOf(' ')));
644 s = s.substring(s.indexOf(' ')).trim();
646 while (s.length() > 0) {
648 String key = s.substring(0, s.indexOf('='));
649 s = s.substring(s.indexOf('=') + 1);
650 if (s.charAt(0) == '\"') {
652 val = s.substring(0, s.indexOf('\"'));
653 s = s.substring(s.indexOf('\"') + 1);
655 val = s.indexOf(',') == -1 ? s : s.substring(0, s.indexOf(','));
656 s = s.indexOf(',') == -1 ? "" : s.substring(s.indexOf(',') + 1);
658 if (s.length() > 0 && s.charAt(0) == ',') s = s.substring(1);
665 private String H(String s) throws IOException {
666 byte[] b = s.getBytes("US-ASCII");
667 MD5Digest md5 = new MD5Digest();
668 md5.update(b, 0, b.length);
669 byte[] out = new byte[md5.getDigestSize()];
672 for(int i=0; i<out.length; i++) {
673 ret += "0123456789abcdef".charAt((out[i] & 0xf0) >> 4);
674 ret += "0123456789abcdef".charAt(out[i] & 0x0f);
680 // Proxy ///////////////////////////////////////////////////////////
682 /** encapsulates most of the proxy logic; some is shared in HTTP.java */
683 public static class Proxy {
687 /** the HTTP Proxy host to use */
688 public String httpProxyHost = null;
690 /** the HTTP Proxy port to use */
691 public int httpProxyPort = -1;
693 /** if a seperate proxy should be used for HTTPS, this is the hostname; otherwise, httpProxyHost is used */
694 public String httpsProxyHost = null;
696 /** if a seperate proxy should be used for HTTPS, this is the port */
697 public int httpsProxyPort = -1;
699 /** the SOCKS Proxy Host to use */
700 public String socksProxyHost = null;
702 /** the SOCKS Proxy Port to use */
703 public int socksProxyPort = -1;
705 /** hosts to be excluded from proxy use; wildcards permitted */
706 public String[] excluded = null;
708 /** the PAC script */
709 public JSCallable proxyAutoConfigJSFunction = null;
711 public static Proxy detectProxyViaManual() {
712 Proxy ret = new Proxy();
714 ret.httpProxyHost = Platform.getEnv("http_proxy");
715 if (ret.httpProxyHost != null) {
716 if (ret.httpProxyHost.startsWith("http://")) ret.httpProxyHost = ret.httpProxyHost.substring(7);
717 if (ret.httpProxyHost.endsWith("/")) ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.length() - 1);
718 if (ret.httpProxyHost.indexOf(':') != -1) {
719 ret.httpProxyPort = Integer.parseInt(ret.httpProxyHost.substring(ret.httpProxyHost.indexOf(':') + 1));
720 ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.indexOf(':'));
722 ret.httpProxyPort = 80;
726 ret.httpsProxyHost = Platform.getEnv("https_proxy");
727 if (ret.httpsProxyHost != null) {
728 if (ret.httpsProxyHost.startsWith("https://")) ret.httpsProxyHost = ret.httpsProxyHost.substring(7);
729 if (ret.httpsProxyHost.endsWith("/")) ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.length() - 1);
730 if (ret.httpsProxyHost.indexOf(':') != -1) {
731 ret.httpsProxyPort = Integer.parseInt(ret.httpsProxyHost.substring(ret.httpsProxyHost.indexOf(':') + 1));
732 ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.indexOf(':'));
734 ret.httpsProxyPort = 80;
738 ret.socksProxyHost = Platform.getEnv("socks_proxy");
739 if (ret.socksProxyHost != null) {
740 if (ret.socksProxyHost.startsWith("socks://")) ret.socksProxyHost = ret.socksProxyHost.substring(7);
741 if (ret.socksProxyHost.endsWith("/")) ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.length() - 1);
742 if (ret.socksProxyHost.indexOf(':') != -1) {
743 ret.socksProxyPort = Integer.parseInt(ret.socksProxyHost.substring(ret.socksProxyHost.indexOf(':') + 1));
744 ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.indexOf(':'));
746 ret.socksProxyPort = 80;
750 String noproxy = Platform.getEnv("no_proxy");
751 if (noproxy != null) {
752 StringTokenizer st = new StringTokenizer(noproxy, ",");
753 ret.excluded = new String[st.countTokens()];
754 for(int i=0; st.hasMoreTokens(); i++) ret.excluded[i] = st.nextToken();
757 if (ret.httpProxyHost == null && ret.socksProxyHost == null) return null;
761 public static JSScope proxyAutoConfigRootJSScope = new ProxyAutoConfigRootJSScope();
762 public static JSCallable getProxyAutoConfigJSFunction(String url) {
764 BufferedReader br = new BufferedReader(new InputStreamReader(new HTTP(url, true).GET()));
767 while((s = br.readLine()) != null) script += s + "\n";
768 if (Log.on) Log.log(Proxy.class, "successfully retrieved WPAD PAC:");
769 if (Log.on) Log.log(Proxy.class, script);
772 Vector carpHosts = new Vector();
773 for(int i=0; i<script.length(); i++)
774 if (script.regionMatches(i, "new Node(", 0, 9)) {
775 String host = script.substring(i + 10, script.indexOf('\"', i + 11));
776 if (Log.on) Log.log(Proxy.class, "Detected MS Proxy Server CARP Script, Host=" + host);
777 carpHosts.addElement(host);
779 if (carpHosts.size() > 0) {
780 script = "function FindProxyForURL(url, host) {\nreturn \"";
781 for(int i=0; i<carpHosts.size(); i++)
782 script += "PROXY " + carpHosts.elementAt(i) + "; ";
784 if (Log.on) Log.log(Proxy.class, "DeCARPed PAC script:");
785 if (Log.on) Log.log(Proxy.class, script);
788 JSFunction scr = JS.parse("PAC script at " + url, 0, new StringReader(script));
789 scr.cloneWithNewParentJSScope(proxyAutoConfigRootJSScope).call(null, new JSArray());
790 return (JSCallable)proxyAutoConfigRootJSScope.get("FindProxyForURL");
791 } catch (Exception e) {
793 Log.log(Platform.class, "WPAD detection failed due to:");
794 if (e instanceof JS.Exn) {
796 org.xwt.js.JSArray arr = new org.xwt.js.JSArray();
797 arr.addElement(((JS.Exn)e).getObject());
798 } catch (Exception e2) {
799 Log.log(Platform.class, e);
802 else Log.log(Platform.class, e);
809 // Authorization ///////////////////////////////////////////////////////////////////////////////////
811 public static class Authorization {
813 static public String authorization = null;
814 static public String authorization2 = null;
815 static public Semaphore waitingForUser = new Semaphore();
817 public static synchronized void getPassword(final String realm, final String style, final String proxyIP, String oldAuth) {
819 // this handles cases where multiple threads hit the proxy auth at the same time -- all but one will block on the
820 // synchronized keyword. If 'authorization' changed while the thread was blocked, it means that the user entered
821 // a password, so we should reattempt authorization.
823 if (authorization != oldAuth) return;
824 if (Log.on) Log.log(Authorization.class, "displaying proxy authorization dialog");
826 Message.Q.add(new Message() {
827 public void perform() {
829 Template t = Template.getTemplate((Res)Main.builtin.get("org/xwt/builtin/proxy_authorization.xwt"));
830 t.apply(b, null, null);
831 b.put("realm", realm);
832 b.put("proxyIP", proxyIP);
836 waitingForUser.block();
837 if (Log.on) Log.log(Authorization.class, "got proxy authorization info; re-attempting connection");
843 // ProxyAutoConfigRootJSScope ////////////////////////////////////////////////////////////////////
845 public static class ProxyAutoConfigRootJSScope extends JSScope.Global {
847 public ProxyAutoConfigRootJSScope() { super(null); }
849 public Object get(Object name) {
850 if (name.equals("isPlainHostName")) return isPlainHostName;
851 else if (name.equals("dnsDomainIs")) return dnsDomainIs;
852 else if (name.equals("localHostOrDomainIs")) return localHostOrDomainIs;
853 else if (name.equals("isResolvable")) return isResolvable;
854 else if (name.equals("isInNet")) return isInNet;
855 else if (name.equals("dnsResolve")) return dnsResolve;
856 else if (name.equals("myIpAddress")) return myIpAddress;
857 else if (name.equals("dnsDomainLevels")) return dnsDomainLevels;
858 else if (name.equals("shExpMatch")) return shExpMatch;
859 else if (name.equals("weekdayRange")) return weekdayRange;
860 else if (name.equals("dateRange")) return dateRange;
861 else if (name.equals("timeRange")) return timeRange;
862 else if (name.equals("ProxyConfig")) return ProxyConfig;
863 else return super.get(name);
866 private static final JSObj proxyConfigBindings = new JSObj();
867 private static final JSObj ProxyConfig = new JSObj() {
868 public Object get(Object name) {
869 if (name.equals("bindings")) return proxyConfigBindings;
874 private static final JSCallable isPlainHostName = new JSCallable() {
875 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
876 return (args.elementAt(0).toString().indexOf('.') == -1) ? Boolean.TRUE : Boolean.FALSE;
880 private static final JSCallable dnsDomainIs = new JSCallable() {
881 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
882 return (args.elementAt(0).toString().endsWith(args.elementAt(1).toString())) ? Boolean.TRUE : Boolean.FALSE;
886 private static final JSCallable localHostOrDomainIs = new JSCallable() {
887 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
888 return (args.elementAt(0).toString().equals(args.elementAt(1).toString()) ||
889 (args.elementAt(0).toString().indexOf('.') == -1 && args.elementAt(1).toString().startsWith(args.elementAt(0).toString()))) ?
890 Boolean.TRUE : Boolean.FALSE;
894 private static final JSCallable isResolvable = new JSCallable() {
895 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
897 return (InetAddress.getByName(args.elementAt(0).toString()) != null) ? Boolean.TRUE : Boolean.FALSE;
898 } catch (UnknownHostException e) {
899 return Boolean.FALSE;
904 private static final JSCallable isInNet = new JSCallable() {
905 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
906 if (args.length() != 3) return Boolean.FALSE;
908 byte[] host = InetAddress.getByName(args.elementAt(0).toString()).getAddress();
909 byte[] net = InetAddress.getByName(args.elementAt(1).toString()).getAddress();
910 byte[] mask = InetAddress.getByName(args.elementAt(2).toString()).getAddress();
911 return ((host[0] & mask[0]) == net[0] &&
912 (host[1] & mask[1]) == net[1] &&
913 (host[2] & mask[2]) == net[2] &&
914 (host[3] & mask[3]) == net[3]) ?
915 Boolean.TRUE : Boolean.FALSE;
916 } catch (Exception e) {
917 throw new JS.Exn("exception in isInNet(): " + e);
922 private static final JSCallable dnsResolve = new JSCallable() {
923 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
925 return InetAddress.getByName(args.elementAt(0).toString()).getHostAddress();
926 } catch (UnknownHostException e) {
932 private static final JSCallable myIpAddress = new JSCallable() {
933 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
935 return InetAddress.getLocalHost().getHostAddress();
936 } catch (UnknownHostException e) {
937 if (Log.on) Log.log(this, "strange... host does not know its own address");
943 private static final JSCallable dnsDomainLevels = new JSCallable() {
944 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
945 String s = args.elementAt(0).toString();
947 while((i = s.indexOf('.', i)) != -1) i++;
948 return new Integer(i);
952 private static boolean match(String[] arr, String s, int index) {
953 if (index >= arr.length) return true;
954 for(int i=0; i<s.length(); i++) {
955 String s2 = s.substring(i);
956 if (s2.startsWith(arr[index]) && match(arr, s2.substring(arr[index].length()), index + 1)) return true;
961 private static final JSCallable shExpMatch = new JSCallable() {
962 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
963 StringTokenizer st = new StringTokenizer(args.elementAt(1).toString(), "*", false);
964 String[] arr = new String[st.countTokens()];
965 String s = args.elementAt(0).toString();
966 for (int i=0; st.hasMoreTokens(); i++) arr[i] = st.nextToken();
967 return match(arr, s, 0) ? Boolean.TRUE : Boolean.FALSE;
971 public static String[] days = { "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };
973 private static final JSCallable weekdayRange = new JSCallable() {
974 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
975 TimeZone tz = (args.length() < 3 || args.elementAt(2) == null || !args.elementAt(2).equals("GMT")) ? TimeZone.getTimeZone("UTC") : TimeZone.getDefault();
976 Calendar c = new GregorianCalendar();
978 c.setTime(new java.util.Date());
979 java.util.Date d = c.getTime();
980 int day = d.getDay();
982 String d1s = args.elementAt(0).toString().toUpperCase();
984 for(int i=0; i<days.length; i++) if (days[i].equals(d1s)) d1 = i;
986 if (args.length() == 1)
987 return d1 == day ? Boolean.TRUE : Boolean.FALSE;
989 String d2s = args.elementAt(1).toString().toUpperCase();
990 for(int i=0; i<days.length; i++) if (days[i].equals(d2s)) d2 = i;
993 ((d1 <= d2 && day >= d1 && day <= d2) ||
994 (d1 > d2 && (day >= d1 || day <= d2))) ?
995 Boolean.TRUE : Boolean.FALSE;
999 private static final JSCallable dateRange = new JSCallable() {
1000 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
1001 throw new JS.Exn("XWT does not support dateRange() in PAC scripts");
1005 private static final JSCallable timeRange = new JSCallable() {
1006 public Object call(org.xwt.js.JSArray args) throws JS.Exn {
1007 throw new JS.Exn("XWT does not support timeRange() in PAC scripts");
1014 * An implementation of Microsoft's proprietary NTLM authentication protocol. This code was derived from Eric
1015 * Glass's work, and is copyright as follows:
1017 * Copyright (c) 2003 Eric Glass (eglass1 at comcast.net).
1019 * Permission to use, copy, modify, and distribute this document for any purpose and without any fee is hereby
1020 * granted, provided that the above copyright notice and this list of conditions appear in all copies.
1021 * The most current version of this document may be obtained from http://davenport.sourceforge.net/ntlm.html .
1023 public static class NTLM {
1025 public static final byte[] type1 = new byte[] { 0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01,
1026 0x00, 0x00, 0x00, 0x00, 0x02, 0x02, 0x00 };
1029 * Calculates the NTLM Response for the given challenge, using the
1030 * specified password.
1032 * @param password The user's password.
1033 * @param challenge The Type 2 challenge from the server.
1035 * @return The NTLM Response.
1037 public static byte[] getNTLMResponse(String password, byte[] challenge)
1039 byte[] ntlmHash = ntlmHash(password);
1040 return lmResponse(ntlmHash, challenge);
1044 * Calculates the LM Response for the given challenge, using the specified
1047 * @param password The user's password.
1048 * @param challenge The Type 2 challenge from the server.
1050 * @return The LM Response.
1052 public static byte[] getLMResponse(String password, byte[] challenge)
1054 byte[] lmHash = lmHash(password);
1055 return lmResponse(lmHash, challenge);
1059 * Calculates the NTLMv2 Response for the given challenge, using the
1060 * specified authentication target, username, password, target information
1061 * block, and client challenge.
1063 * @param target The authentication target (i.e., domain).
1064 * @param user The username.
1065 * @param password The user's password.
1066 * @param targetInformation The target information block from the Type 2
1068 * @param challenge The Type 2 challenge from the server.
1069 * @param clientChallenge The random 8-byte client challenge.
1071 * @return The NTLMv2 Response.
1073 public static byte[] getNTLMv2Response(String target, String user,
1074 String password, byte[] targetInformation, byte[] challenge,
1075 byte[] clientChallenge) throws Exception {
1076 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
1077 byte[] blob = createBlob(targetInformation, clientChallenge);
1078 return lmv2Response(ntlmv2Hash, blob, challenge);
1082 * Calculates the LMv2 Response for the given challenge, using the
1083 * specified authentication target, username, password, and client
1086 * @param target The authentication target (i.e., domain).
1087 * @param user The username.
1088 * @param password The user's password.
1089 * @param challenge The Type 2 challenge from the server.
1090 * @param clientChallenge The random 8-byte client challenge.
1092 * @return The LMv2 Response.
1094 public static byte[] getLMv2Response(String target, String user,
1095 String password, byte[] challenge, byte[] clientChallenge)
1097 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
1098 return lmv2Response(ntlmv2Hash, clientChallenge, challenge);
1102 * Calculates the NTLM2 Session Response for the given challenge, using the
1103 * specified password and client challenge.
1105 * @param password The user's password.
1106 * @param challenge The Type 2 challenge from the server.
1107 * @param clientChallenge The random 8-byte client challenge.
1109 * @return The NTLM2 Session Response. This is placed in the NTLM
1110 * response field of the Type 3 message; the LM response field contains
1111 * the client challenge, null-padded to 24 bytes.
1113 public static byte[] getNTLM2SessionResponse(String password,
1114 byte[] challenge, byte[] clientChallenge) throws Exception {
1115 byte[] ntlmHash = ntlmHash(password);
1116 MD5Digest md5 = new MD5Digest();
1117 md5.update(challenge, 0, challenge.length);
1118 md5.update(clientChallenge, 0, clientChallenge.length);
1119 byte[] sessionHash = new byte[8];
1120 byte[] md5_out = new byte[md5.getDigestSize()];
1121 md5.doFinal(md5_out, 0);
1122 System.arraycopy(md5_out, 0, sessionHash, 0, 8);
1123 return lmResponse(ntlmHash, sessionHash);
1127 * Creates the LM Hash of the user's password.
1129 * @param password The password.
1131 * @return The LM Hash of the given password, used in the calculation
1132 * of the LM Response.
1134 private static byte[] lmHash(String password) throws Exception {
1136 byte[] oemPassword = password.toUpperCase().getBytes("US-ASCII");
1137 int length = java.lang.Math.min(oemPassword.length, 14);
1138 byte[] keyBytes = new byte[14];
1139 System.arraycopy(oemPassword, 0, keyBytes, 0, length);
1140 Key lowKey = createDESKey(keyBytes, 0);
1141 Key highKey = createDESKey(keyBytes, 7);
1142 byte[] magicConstant = "KGS!@#$%".getBytes("US-ASCII");
1143 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1144 des.init(Cipher.ENCRYPT_MODE, lowKey);
1145 byte[] lowHash = des.doFinal(magicConstant);
1146 des.init(Cipher.ENCRYPT_MODE, highKey);
1147 byte[] highHash = des.doFinal(magicConstant);
1148 byte[] lmHash = new byte[16];
1149 System.arraycopy(lowHash, 0, lmHash, 0, 8);
1150 System.arraycopy(highHash, 0, lmHash, 8, 8);
1157 * Creates the NTLM Hash of the user's password.
1159 * @param password The password.
1161 * @return The NTLM Hash of the given password, used in the calculation
1162 * of the NTLM Response and the NTLMv2 and LMv2 Hashes.
1164 private static byte[] ntlmHash(String password) throws Exception {
1165 byte[] unicodePassword = password.getBytes("UnicodeLittleUnmarked");
1166 MD4Digest md4 = new MD4Digest();
1167 md4.update(unicodePassword, 0, unicodePassword.length);
1168 byte[] ret = new byte[md4.getDigestSize()];
1173 * Creates the NTLMv2 Hash of the user's password.
1175 * @param target The authentication target (i.e., domain).
1176 * @param user The username.
1177 * @param password The password.
1179 * @return The NTLMv2 Hash, used in the calculation of the NTLMv2
1180 * and LMv2 Responses.
1182 private static byte[] ntlmv2Hash(String target, String user,
1183 String password) throws Exception {
1184 byte[] ntlmHash = ntlmHash(password);
1185 String identity = user.toUpperCase() + target.toUpperCase();
1186 return hmacMD5(identity.getBytes("UnicodeLittleUnmarked"), ntlmHash);
1190 * Creates the LM Response from the given hash and Type 2 challenge.
1192 * @param hash The LM or NTLM Hash.
1193 * @param challenge The server challenge from the Type 2 message.
1195 * @return The response (either LM or NTLM, depending on the provided
1198 private static byte[] lmResponse(byte[] hash, byte[] challenge)
1201 byte[] keyBytes = new byte[21];
1202 System.arraycopy(hash, 0, keyBytes, 0, 16);
1203 Key lowKey = createDESKey(keyBytes, 0);
1204 Key middleKey = createDESKey(keyBytes, 7);
1205 Key highKey = createDESKey(keyBytes, 14);
1206 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1207 des.init(Cipher.ENCRYPT_MODE, lowKey);
1208 byte[] lowResponse = des.doFinal(challenge);
1209 des.init(Cipher.ENCRYPT_MODE, middleKey);
1210 byte[] middleResponse = des.doFinal(challenge);
1211 des.init(Cipher.ENCRYPT_MODE, highKey);
1212 byte[] highResponse = des.doFinal(challenge);
1213 byte[] lmResponse = new byte[24];
1214 System.arraycopy(lowResponse, 0, lmResponse, 0, 8);
1215 System.arraycopy(middleResponse, 0, lmResponse, 8, 8);
1216 System.arraycopy(highResponse, 0, lmResponse, 16, 8);
1223 * Creates the LMv2 Response from the given hash, client data, and
1226 * @param hash The NTLMv2 Hash.
1227 * @param clientData The client data (blob or client challenge).
1228 * @param challenge The server challenge from the Type 2 message.
1230 * @return The response (either NTLMv2 or LMv2, depending on the
1233 private static byte[] lmv2Response(byte[] hash, byte[] clientData,
1234 byte[] challenge) throws Exception {
1235 byte[] data = new byte[challenge.length + clientData.length];
1236 System.arraycopy(challenge, 0, data, 0, challenge.length);
1237 System.arraycopy(clientData, 0, data, challenge.length,
1239 byte[] mac = hmacMD5(data, hash);
1240 byte[] lmv2Response = new byte[mac.length + clientData.length];
1241 System.arraycopy(mac, 0, lmv2Response, 0, mac.length);
1242 System.arraycopy(clientData, 0, lmv2Response, mac.length,
1244 return lmv2Response;
1248 * Creates the NTLMv2 blob from the given target information block and
1251 * @param targetInformation The target information block from the Type 2
1253 * @param clientChallenge The random 8-byte client challenge.
1255 * @return The blob, used in the calculation of the NTLMv2 Response.
1257 private static byte[] createBlob(byte[] targetInformation,
1258 byte[] clientChallenge) {
1259 byte[] blobSignature = new byte[] {
1260 (byte) 0x01, (byte) 0x01, (byte) 0x00, (byte) 0x00
1262 byte[] reserved = new byte[] {
1263 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1265 byte[] unknown1 = new byte[] {
1266 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1268 byte[] unknown2 = new byte[] {
1269 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1271 long time = System.currentTimeMillis();
1272 time += 11644473600000l; // milliseconds from January 1, 1601 -> epoch.
1273 time *= 10000; // tenths of a microsecond.
1274 // convert to little-endian byte array.
1275 byte[] timestamp = new byte[8];
1276 for (int i = 0; i < 8; i++) {
1277 timestamp[i] = (byte) time;
1280 byte[] blob = new byte[blobSignature.length + reserved.length +
1281 timestamp.length + clientChallenge.length +
1282 unknown1.length + targetInformation.length +
1285 System.arraycopy(blobSignature, 0, blob, offset, blobSignature.length);
1286 offset += blobSignature.length;
1287 System.arraycopy(reserved, 0, blob, offset, reserved.length);
1288 offset += reserved.length;
1289 System.arraycopy(timestamp, 0, blob, offset, timestamp.length);
1290 offset += timestamp.length;
1291 System.arraycopy(clientChallenge, 0, blob, offset,
1292 clientChallenge.length);
1293 offset += clientChallenge.length;
1294 System.arraycopy(unknown1, 0, blob, offset, unknown1.length);
1295 offset += unknown1.length;
1296 System.arraycopy(targetInformation, 0, blob, offset,
1297 targetInformation.length);
1298 offset += targetInformation.length;
1299 System.arraycopy(unknown2, 0, blob, offset, unknown2.length);
1304 * Calculates the HMAC-MD5 hash of the given data using the specified
1307 * @param data The data for which the hash will be calculated.
1308 * @param key The hashing key.
1310 * @return The HMAC-MD5 hash of the given data.
1312 private static byte[] hmacMD5(byte[] data, byte[] key) throws Exception {
1313 byte[] ipad = new byte[64];
1314 byte[] opad = new byte[64];
1315 for (int i = 0; i < 64; i++) {
1316 ipad[i] = (byte) 0x36;
1317 opad[i] = (byte) 0x5c;
1319 for (int i = key.length - 1; i >= 0; i--) {
1323 byte[] content = new byte[data.length + 64];
1324 System.arraycopy(ipad, 0, content, 0, 64);
1325 System.arraycopy(data, 0, content, 64, data.length);
1326 MD5Digest md5 = new MD5Digest();
1327 md5.update(content, 0, content.length);
1328 data = new byte[md5.getDigestSize()];
1329 md5.doFinal(data, 0);
1330 content = new byte[data.length + 64];
1331 System.arraycopy(opad, 0, content, 0, 64);
1332 System.arraycopy(data, 0, content, 64, data.length);
1333 md5 = new MD5Digest();
1334 md5.update(content, 0, content.length);
1335 byte[] ret = new byte[md5.getDigestSize()];
1336 md5.doFinal(ret, 0);
1341 * Creates a DES encryption key from the given key material.
1343 * @param bytes A byte array containing the DES key material.
1344 * @param offset The offset in the given byte array at which
1345 * the 7-byte key material starts.
1347 * @return A DES encryption key created from the key material
1348 * starting at the specified offset in the given byte array.
1351 private static Key createDESKey(byte[] bytes, int offset) {
1352 byte[] keyBytes = new byte[7];
1353 System.arraycopy(bytes, offset, keyBytes, 0, 7);
1354 byte[] material = new byte[8];
1355 material[0] = keyBytes[0];
1356 material[1] = (byte) (keyBytes[0] << 7 | (keyBytes[1] & 0xff) >>> 1);
1357 material[2] = (byte) (keyBytes[1] << 6 | (keyBytes[2] & 0xff) >>> 2);
1358 material[3] = (byte) (keyBytes[2] << 5 | (keyBytes[3] & 0xff) >>> 3);
1359 material[4] = (byte) (keyBytes[3] << 4 | (keyBytes[4] & 0xff) >>> 4);
1360 material[5] = (byte) (keyBytes[4] << 3 | (keyBytes[5] & 0xff) >>> 5);
1361 material[6] = (byte) (keyBytes[5] << 2 | (keyBytes[6] & 0xff) >>> 6);
1362 material[7] = (byte) (keyBytes[6] << 1);
1363 oddParity(material);
1364 return new SecretKeySpec(material, "DES");
1369 * Applies odd parity to the given byte array.
1371 * @param bytes The data whose parity bits are to be adjusted for
1374 private static void oddParity(byte[] bytes) {
1375 for (int i = 0; i < bytes.length; i++) {
1377 boolean needsParity = (((b >>> 7) ^ (b >>> 6) ^ (b >>> 5) ^
1378 (b >>> 4) ^ (b >>> 3) ^ (b >>> 2) ^
1379 (b >>> 1)) & 0x01) == 0;
1381 bytes[i] |= (byte) 0x01;
1383 bytes[i] &= (byte) 0xfe;