1 // Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
8 import org.ibex.util.*;
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.
19 // Public Methods ////////////////////////////////////////////////////////////////////////////////////////
21 public HTTP(String url) { this(url, false); }
22 public HTTP(String url, boolean skipResolveCheck) { originalUrl = url; this.skipResolveCheck = skipResolveCheck; }
24 /** Performs an HTTP GET request */
25 public InputStream GET() throws IOException { return makeRequest(null, null); }
27 /** Performs an HTTP POST request; content is additional headers, blank line, and body */
28 public InputStream POST(String contentType, String content) throws IOException { return makeRequest(contentType, content); }
30 public static class HTTPException extends IOException { public HTTPException(String s) { super(s); } }
32 public static HTTP stdio = new HTTP("stdio:");
35 // Statics ///////////////////////////////////////////////////////////////////////////////////////////////
37 static Hash resolvedHosts = new Hash(); ///< cache for resolveAndCheckIfFirewalled()
38 private static Hash authCache = new Hash(); ///< cache of userInfo strings, keyed on originalUrl
41 // Instance Data ///////////////////////////////////////////////////////////////////////////////////////////////
43 final String originalUrl; ///< the URL as passed to the original constructor; this is never changed
44 String url = null; ///< the URL to connect to; this is munged when the url is parsed */
45 String host = null; ///< the host to connect to
46 int port = -1; ///< the port to connect on
47 boolean ssl = false; ///< true if SSL (HTTPS) should be used
48 String path = null; ///< the path (URI) to retrieve on the server
49 Socket sock = null; ///< the socket
50 InputStream in = null; ///< the socket's inputstream
51 String userInfo = null; ///< the username and password portions of the URL
52 boolean firstRequest = true; ///< true iff this is the first request to be made on this socket
53 boolean skipResolveCheck = false; ///< allowed to skip the resolve check when downloading PAC script
54 boolean proxied = false; ///< true iff we're using a proxy
56 /** this is null if the current request is the first request on
57 * this HTTP connection; otherwise it is a Semaphore which will be
58 * released once the request ahead of us has recieved its response
60 Semaphore okToRecieve = null;
63 * This method isn't synchronized; however, only one thread can be in the inner synchronized block at a time, and the rest of
64 * the method is protected by in-order one-at-a-time semaphore lock-steps
66 private InputStream makeRequest(String contentType, String content) throws IOException {
68 // Step 1: send the request and establish a semaphore to stop any requests that pipeline after us
69 Semaphore blockOn = null;
70 Semaphore releaseMe = null;
74 sendRequest(contentType, content);
75 } catch (IOException e) {
79 blockOn = okToRecieve;
80 releaseMe = okToRecieve = new Semaphore();
83 // Step 2: wait for requests ahead of us to complete, then read the reply off the stream
84 boolean doRelease = true;
86 if (blockOn != null) blockOn.block();
88 // previous call wrecked the socket connection, but we already sent our request, so we can't just retry --
89 // this could cause the server to receive the request twice, which could be bad (think of the case where the
90 // server call causes Amazon.com to ship you an item with one-click purchasing).
92 throw new HTTPException("a previous pipelined call messed up the socket");
94 Hashtable h = in == null ? null : parseHeaders(in);
96 if (firstRequest) throw new HTTPException("server closed the socket with no response");
97 // sometimes the server chooses to close the stream between requests
100 return makeRequest(contentType, content);
103 String reply = h.get("STATUSLINE").toString();
105 if (reply.startsWith("407") || reply.startsWith("401")) {
107 if (reply.startsWith("407")) doProxyAuth(h, content == null ? "GET" : "POST");
108 else doWebAuth(h, content == null ? "GET" : "POST");
110 if (h.get("HTTP").equals("1.0") && h.get("content-length") == null) {
111 if (Log.on) Log.info(this, "proxy returned an HTTP/1.0 reply with no content-length...");
114 int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
115 new HTTPInputStream(in, cl, releaseMe).close();
118 return makeRequest(contentType, content);
120 } else if (reply.startsWith("2")) {
121 if (h.get("HTTP").equals("1.0") && h.get("content-length") == null)
122 throw new HTTPException("Ibex does not support HTTP/1.0 servers which fail to return the Content-Length header");
123 int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
124 InputStream ret = new HTTPInputStream(in, cl, releaseMe);
125 if ("gzip".equals(h.get("content-encoding"))) ret = new java.util.zip.GZIPInputStream(ret);
130 throw new HTTPException("HTTP Error: " + reply);
134 } catch (IOException e) { reset(); throw e;
135 } finally { if (doRelease) releaseMe.release();
140 // Safeguarded DNS Resolver ///////////////////////////////////////////////////////////////////////////
143 * resolves the hostname and returns it as a string in the form "x.y.z.w"
144 * @throws HTTPException if the host falls within a firewalled netblock
146 private void resolveAndCheckIfFirewalled(String host) throws HTTPException {
149 if (resolvedHosts.get(host) != null) return;
151 // if all scripts are trustworthy (local FS), continue
152 if (Main.originAddr == null) return;
156 InetAddress addr = InetAddress.getByName(host);
157 byte[] quadbyte = addr.getAddress();
158 if ((quadbyte[0] == 10 ||
159 (quadbyte[0] == 192 && quadbyte[1] == 168) ||
160 (quadbyte[0] == 172 && (quadbyte[1] & 0xF0) == 16)) && !addr.equals(Main.originAddr))
161 throw new HTTPException("security violation: " + host + " [" + addr.getHostAddress() +
162 "] is in a firewalled netblock");
164 } catch (UnknownHostException uhe) { }
166 if (Platform.detectProxy() == null)
167 throw new HTTPException("could not resolve hostname \"" + host + "\" and no proxy configured");
171 // Methods to attempt socket creation /////////////////////////////////////////////////////////////////
173 private Socket getSocket(String host, int port, boolean ssl, boolean negotiate) throws IOException {
174 Socket ret = ssl ? new SSL(host, port, negotiate) : new Socket(java.net.InetAddress.getByName(host), port);
175 ret.setTcpNoDelay(true);
179 /** Attempts a direct connection */
180 private Socket attemptDirect() {
182 if (Log.verbose) Log.info(this, "attempting to create unproxied socket to " +
183 host + ":" + port + (ssl ? " [ssl]" : ""));
184 return getSocket(host, port, ssl, true);
185 } catch (IOException e) {
186 if (Log.on) Log.info(this, "exception in attemptDirect(): " + e);
191 /** Attempts to use an HTTP proxy, employing the CONNECT method if HTTPS is requested */
192 private Socket attemptHttpProxy(String proxyHost, int proxyPort) {
194 if (Log.verbose) Log.info(this, "attempting to create HTTP proxied socket using proxy " + proxyHost + ":" + proxyPort);
195 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
198 if (!path.startsWith("http://")) path = "http://" + host + ":" + port + path;
202 PrintWriter pw = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
203 BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
204 pw.print("CONNECT " + host + ":" + port + " HTTP/1.1\r\n\r\n");
206 String s = br.readLine();
207 if (s.charAt(9) != '2') throw new HTTPException("proxy refused CONNECT method: \"" + s + "\"");
208 while (br.readLine().length() > 0) { };
209 ((SSL)sock).negotiate();
212 } catch (IOException e) {
213 if (Log.on) Log.info(this, "exception in attemptHttpProxy(): " + e);
219 * Implements SOCKSv4 with v4a DNS extension
220 * @see http://www.socks.nec.com/protocol/socks4.protocol
221 * @see http://www.socks.nec.com/protocol/socks4a.protocol
223 private Socket attemptSocksProxy(String proxyHost, int proxyPort) {
225 // even if host is already a "x.y.z.w" string, we use this to parse it into bytes
226 InetAddress addr = null;
227 try { addr = InetAddress.getByName(host); } catch (Exception e) { }
229 if (Log.verbose) Log.info(this, "attempting to create SOCKSv4" + (addr == null ? "" : "a") +
230 " proxied socket using proxy " + proxyHost + ":" + proxyPort);
233 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
235 DataOutputStream dos = new DataOutputStream(sock.getOutputStream());
236 dos.writeByte(0x04); // SOCKSv4(a)
237 dos.writeByte(0x01); // CONNECT
238 dos.writeShort(port & 0xffff); // port
239 if (addr == null) dos.writeInt(0x00000001); // bogus IP
240 else dos.write(addr.getAddress()); // actual IP
241 dos.writeByte(0x00); // no userid
243 PrintWriter pw = new PrintWriter(new OutputStreamWriter(dos));
246 dos.writeByte(0x00); // hostname null terminator
250 DataInputStream dis = new DataInputStream(sock.getInputStream());
251 dis.readByte(); // reply version
252 byte success = dis.readByte(); // success/fail
253 dis.skip(6); // ip/port
255 if ((int)(success & 0xff) == 90) {
256 if (ssl) ((SSL)sock).negotiate();
259 if (Log.on) Log.info(this, "SOCKS server denied access, code " + (success & 0xff));
262 } catch (IOException e) {
263 if (Log.on) Log.info(this, "exception in attemptSocksProxy(): " + e);
268 /** executes the PAC script and dispatches a call to one of the other attempt methods based on the result */
269 private Socket attemptPAC(org.ibex.js.JS pacFunc) {
270 if (Log.verbose) Log.info(this, "evaluating PAC script");
273 Object obj = pacFunc.call(url, host, null, null, 2);
274 if (Log.verbose) Log.info(this, " PAC script returned \"" + obj + "\"");
275 pac = obj.toString();
276 } catch (Throwable e) {
277 if (Log.on) Log.info(this, "PAC script threw exception " + e);
281 StringTokenizer st = new StringTokenizer(pac, ";", false);
282 while (st.hasMoreTokens()) {
283 String token = st.nextToken().trim();
284 if (Log.verbose) Log.info(this, " trying \"" + token + "\"...");
287 if (token.startsWith("DIRECT"))
288 ret = attemptDirect();
289 else if (token.startsWith("PROXY"))
290 ret = attemptHttpProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
291 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
292 else if (token.startsWith("SOCKS"))
293 ret = attemptSocksProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
294 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
295 if (ret != null) return ret;
296 } catch (Throwable e) {
297 if (Log.on) Log.info(this, "attempt at \"" + token + "\" failed due to " + e + "; trying next token");
300 if (Log.on) Log.info(this, "all PAC results exhausted");
305 // Everything Else ////////////////////////////////////////////////////////////////////////////
307 private synchronized void connect() throws IOException {
308 if (originalUrl.equals("stdio:")) { in = new BufferedInputStream(System.in); return; }
310 if (in == null) in = new BufferedInputStream(sock.getInputStream());
313 // grab the userinfo; gcj doesn't have java.net.URL.getUserInfo()
314 String url = originalUrl;
315 userInfo = url.substring(url.indexOf("://") + 3);
316 userInfo = userInfo.indexOf('/') == -1 ? userInfo : userInfo.substring(0, userInfo.indexOf('/'));
317 if (userInfo.indexOf('@') != -1) {
318 userInfo = userInfo.substring(0, userInfo.indexOf('@'));
319 url = url.substring(0, url.indexOf("://") + 3) + url.substring(url.indexOf('@') + 1);
324 if (url.startsWith("https:")) {
326 } else if (!url.startsWith("http:")) {
327 throw new IOException("HTTP only supports http/https urls");
329 if (url.indexOf("://") == -1) throw new IOException("URLs must contain a ://");
330 String temphost = url.substring(url.indexOf("://") + 1);
331 path = temphost.substring(temphost.indexOf('/'));
332 temphost = temphost.substring(0, temphost.indexOf('/'));
333 if (temphost.indexOf(':') != -1) {
334 port = Integer.parseInt(temphost.substring(temphost.indexOf(':')+1));
335 temphost = temphost.substring(0, temphost.indexOf(':'));
337 port = ssl ? 443 : 80;
339 if (!skipResolveCheck) resolveAndCheckIfFirewalled(temphost);
341 if (Log.verbose) Log.info(this, "creating HTTP object for connection to " + host + ":" + port);
343 Proxy pi = Platform.detectProxy();
346 for(int i=0; i<pi.excluded.length; i++) if (host.equals(pi.excluded[i])) break OUTER;
347 if (sock == null && pi.proxyAutoConfigFunction != null) sock = attemptPAC(pi.proxyAutoConfigFunction);
348 if (sock == null && ssl && pi.httpsProxyHost != null) sock = attemptHttpProxy(pi.httpsProxyHost,pi.httpsProxyPort);
349 if (sock == null && pi.httpProxyHost != null) sock = attemptHttpProxy(pi.httpProxyHost, pi.httpProxyPort);
350 if (sock == null && pi.socksProxyHost != null) sock = attemptSocksProxy(pi.socksProxyHost, pi.socksProxyPort);
353 proxied = sock != null;
354 if (sock == null) sock = attemptDirect();
355 if (sock == null) throw new HTTPException("unable to contact host " + host);
356 if (in == null) in = new BufferedInputStream(sock.getInputStream());
359 private void sendRequest(String contentType, String content) throws IOException {
360 PrintWriter pw = new PrintWriter(new OutputStreamWriter(originalUrl.equals("stdio:") ?
361 System.out : sock.getOutputStream()));
362 if (content != null) {
363 pw.print("POST " + path + " HTTP/1.0\r\n"); // FIXME chunked encoding
364 int contentLength = content.substring(0, 2).equals("\r\n") ?
365 content.length() - 2 :
366 (content.length() - content.indexOf("\r\n\r\n") - 4);
367 pw.print("Content-Length: " + contentLength + "\r\n");
368 if (contentType != null) pw.print("Content-Type: " + contentType + "\r\n");
370 pw.print("GET " + path + " HTTP/1.1\r\n");
373 pw.print("User-Agent: Ibex\r\n");
374 pw.print("Accept-encoding: gzip\r\n");
375 pw.print("Host: " + (host + (port == 80 ? "" : (":" + port))) + "\r\n");
376 if (proxied) pw.print("X-RequestOrigin: " + Main.originHost + "\r\n");
378 if (Proxy.Authorization.authorization != null) pw.print("Proxy-Authorization: "+Proxy.Authorization.authorization2+"\r\n");
379 if (authCache.get(originalUrl) != null) pw.print("Authorization: " + authCache.get(originalUrl) + "\r\n");
381 pw.print(content == null ? "\r\n" : content);
386 private void doWebAuth(Hashtable h0, String method) throws IOException {
387 if (userInfo == null) throw new HTTPException("web server demanded username/password, but none were supplied");
388 Hashtable h = parseAuthenticationChallenge(h0.get("www-authenticate").toString());
390 if (h.get("AUTHTYPE").equals("Basic")) {
391 if (authCache.get(originalUrl) != null) throw new HTTPException("username/password rejected");
392 authCache.put(originalUrl, "Basic " + new String(Base64.encode(userInfo.getBytes("UTF8"))));
394 } else if (h.get("AUTHTYPE").equals("Digest")) {
395 if (authCache.get(originalUrl) != null && !"true".equals(h.get("stale")))
396 throw new HTTPException("username/password rejected");
398 if (path2.startsWith("http://") || path2.startsWith("https://")) {
399 path2 = path2.substring(path2.indexOf("://") + 3);
400 path2 = path2.substring(path2.indexOf('/'));
402 String A1 = userInfo.substring(0, userInfo.indexOf(':')) + ":" + h.get("realm") + ":" +
403 userInfo.substring(userInfo.indexOf(':') + 1);
404 String A2 = method + ":" + path2;
405 authCache.put(originalUrl,
407 "username=\"" + userInfo.substring(0, userInfo.indexOf(':')) + "\", " +
408 "realm=\"" + h.get("realm") + "\", " +
409 "nonce=\"" + h.get("nonce") + "\", " +
410 "uri=\"" + path2 + "\", " +
411 (h.get("opaque") == null ? "" : ("opaque=\"" + h.get("opaque") + "\", ")) +
412 "response=\"" + H(H(A1) + ":" + h.get("nonce") + ":" + H(A2)) + "\", " +
417 throw new HTTPException("unknown authentication type: " + h.get("AUTHTYPE"));
421 private void doProxyAuth(Hashtable h0, String method) throws IOException {
422 if (Log.on) Log.info(this, "Proxy AuthChallenge: " + h0.get("proxy-authenticate"));
423 Hashtable h = parseAuthenticationChallenge(h0.get("proxy-authenticate").toString());
424 String style = h.get("AUTHTYPE").toString();
425 String realm = (String)h.get("realm");
427 if (style.equals("NTLM") && Proxy.Authorization.authorization2 == null) {
428 Log.info(this, "Proxy identified itself as NTLM, sending Type 1 packet");
429 Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(Proxy.NTLM.type1);
433 if (!realm.equals("Digest") || Proxy.Authorization.authorization2 == null || !"true".equals(h.get("stale")))
434 Proxy.Authorization.getPassword(realm, style, sock.getInetAddress().getHostAddress(),
435 Proxy.Authorization.authorization);
437 if (style.equals("Basic")) {
438 Proxy.Authorization.authorization2 =
439 "Basic " + new String(Base64.encode(Proxy.Authorization.authorization.getBytes("UTF8")));
441 } else if (style.equals("Digest")) {
442 String A1 = Proxy.Authorization.authorization.substring(0, userInfo.indexOf(':')) + ":" + h.get("realm") + ":" +
443 Proxy.Authorization.authorization.substring(Proxy.Authorization.authorization.indexOf(':') + 1);
444 String A2 = method + ":" + path;
445 Proxy.Authorization.authorization2 =
447 "username=\"" + Proxy.Authorization.authorization.substring(0, Proxy.Authorization.authorization.indexOf(':')) +
449 "realm=\"" + h.get("realm") + "\", " +
450 "nonce=\"" + h.get("nonce") + "\", " +
451 "uri=\"" + path + "\", " +
452 (h.get("opaque") == null ? "" : ("opaque=\"" + h.get("opaque") + "\", ")) +
453 "response=\"" + H(H(A1) + ":" + h.get("nonce") + ":" + H(A2)) + "\", " +
456 } else if (style.equals("NTLM")) {
457 Log.info(this, "Proxy identified itself as NTLM, got Type 2 packet");
458 byte[] type2 = Base64.decode(((String)h0.get("proxy-authenticate")).substring(5).trim());
459 for(int i=0; i<type2.length; i += 4) {
461 if (i<type2.length) log += Integer.toString(type2[i] & 0xff, 16) + " ";
462 if (i+1<type2.length) log += Integer.toString(type2[i+1] & 0xff, 16) + " ";
463 if (i+2<type2.length) log += Integer.toString(type2[i+2] & 0xff, 16) + " ";
464 if (i+3<type2.length) log += Integer.toString(type2[i+3] & 0xff, 16) + " ";
467 // FEATURE: need to keep the connection open between type1 and type3
468 // FEATURE: finish this
469 //byte[] type3 = Proxy.NTLM.getResponse(
470 //Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(type3));
475 // HTTPInputStream ///////////////////////////////////////////////////////////////////////////////////
477 /** An input stream that represents a subset of a longer input stream. Supports HTTP chunking as well */
478 public class HTTPInputStream extends FilterInputStream implements KnownLength {
480 private int length = 0; ///< if chunking, numbytes left in this subset; else the remainder of the chunk
481 private Semaphore releaseMe = null; ///< this semaphore will be released when the stream is closed
482 boolean chunkedDone = false; ///< indicates that we have encountered the zero-length terminator chunk
483 boolean firstChunk = true; ///< if we're on the first chunk, we don't pre-read a CRLF
484 private int contentLength = 0; ///< the length of the entire content body; -1 if chunked
486 HTTPInputStream(InputStream in, int length, Semaphore releaseMe) throws IOException {
488 this.releaseMe = releaseMe;
489 this.contentLength = length;
490 this.length = length == -1 ? 0 : length;
493 public int getLength() { return contentLength; }
494 public boolean markSupported() { return false; }
495 public int read(byte[] b) throws IOException { return read(b, 0, b.length); }
496 public long skip(long n) throws IOException { return read(null, -1, (int)n); }
497 public int available() throws IOException {
498 if (contentLength == -1) return java.lang.Math.min(super.available(), length);
499 return super.available();
502 public int read() throws IOException {
503 byte[] b = new byte[1];
504 int ret = read(b, 0, 1);
505 return ret == -1 ? -1 : b[0] & 0xff;
508 private void readChunk() throws IOException {
509 if (chunkedDone) return;
510 if (!firstChunk) super.skip(2); // CRLF
512 String chunkLen = "";
514 int i = super.read();
515 if (i == -1) throw new HTTPException("encountered end of stream while reading chunk length");
517 // FEATURE: handle chunking extensions
525 length = Integer.parseInt(chunkLen.trim(), 16);
526 if (length == 0) chunkedDone = true;
529 public int read(byte[] b, int off, int len) throws IOException {
530 boolean good = false;
532 if (length == 0 && contentLength == -1) {
534 if (chunkedDone) { good = true; return -1; }
536 if (length == 0) { good = true; return -1; }
538 if (len > length) len = length;
539 int ret = b == null ? (int)super.skip(len) : super.read(b, off, len);
550 public void close() throws IOException {
551 if (contentLength == -1) {
552 while(!chunkedDone) {
553 if (length != 0) skip(length);
558 if (length != 0) skip(length);
560 if (releaseMe != null) releaseMe.release();
571 // Misc Helpers ///////////////////////////////////////////////////////////////////////////////////
573 /** reads a set of HTTP headers off of the input stream, returning null if the stream is already at its end */
574 private Hashtable parseHeaders(InputStream in) throws IOException {
575 Hashtable ret = new Hashtable();
577 // we can't use a BufferedReader directly on the input stream, since it will buffer past the end of the headers
578 byte[] buf = new byte[4096];
581 int read = in.read();
582 if (read == -1 && buflen == 0) return null;
583 if (read == -1) throw new HTTPException("stream closed while reading headers");
584 buf[buflen++] = (byte)read;
585 if (buflen >= 4 && buf[buflen - 4] == '\r' && buf[buflen - 3] == '\n' &&
586 buf[buflen - 2] == '\r' && buf[buflen - 1] == '\n')
588 if (buflen >=2 && buf[buflen - 1] == '\n' && buf[buflen - 2] == '\n')
589 break; // nice for people using stdio
590 if (buflen == buf.length) {
591 byte[] newbuf = new byte[buf.length * 2];
592 System.arraycopy(buf, 0, newbuf, 0, buflen);
597 BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(buf, 0, buflen)));
598 String s = br.readLine();
599 if (!s.startsWith("HTTP/")) throw new HTTPException("Expected reply to start with \"HTTP/\", got: " + s);
600 ret.put("STATUSLINE", s.substring(s.indexOf(' ') + 1));
601 ret.put("HTTP", s.substring(5, s.indexOf(' ')));
603 while((s = br.readLine()) != null && s.length() > 0) {
604 String front = s.substring(0, s.indexOf(':')).toLowerCase();
605 String back = s.substring(s.indexOf(':') + 1).trim();
606 // ugly hack: we never replace a Digest-auth with a Basic-auth (proxy + www)
607 if (front.endsWith("-authenticate") && ret.get(front) != null && !back.equals("Digest")) continue;
608 ret.put(front, back);
613 private Hashtable parseAuthenticationChallenge(String s) {
614 Hashtable ret = new Hashtable();
617 ret.put("AUTHTYPE", s.substring(0, s.indexOf(' ')));
618 s = s.substring(s.indexOf(' ')).trim();
620 while (s.length() > 0) {
622 String key = s.substring(0, s.indexOf('='));
623 s = s.substring(s.indexOf('=') + 1);
624 if (s.charAt(0) == '\"') {
626 val = s.substring(0, s.indexOf('\"'));
627 s = s.substring(s.indexOf('\"') + 1);
629 val = s.indexOf(',') == -1 ? s : s.substring(0, s.indexOf(','));
630 s = s.indexOf(',') == -1 ? "" : s.substring(s.indexOf(',') + 1);
632 if (s.length() > 0 && s.charAt(0) == ',') s = s.substring(1);
639 private String H(String s) throws IOException {
640 byte[] b = s.getBytes("UTF8");
641 MD5Digest md5 = new MD5Digest();
642 md5.update(b, 0, b.length);
643 byte[] out = new byte[md5.getDigestSize()];
646 for(int i=0; i<out.length; i++) {
647 ret += "0123456789abcdef".charAt((out[i] & 0xf0) >> 4);
648 ret += "0123456789abcdef".charAt(out[i] & 0x0f);
654 // Proxy ///////////////////////////////////////////////////////////
656 /** encapsulates most of the proxy logic; some is shared in HTTP.java */
657 public static class Proxy {
659 public String httpProxyHost = null; ///< the HTTP Proxy host to use
660 public int httpProxyPort = -1; ///< the HTTP Proxy port to use
661 public String httpsProxyHost = null; ///< seperate proxy for HTTPS
662 public int httpsProxyPort = -1;
663 public String socksProxyHost = null; ///< the SOCKS Proxy Host to use
664 public int socksProxyPort = -1; ///< the SOCKS Proxy Port to use
665 public String[] excluded = new String[] { }; ///< hosts to be excluded from proxy use; wildcards permitted
666 public JS proxyAutoConfigFunction = null; ///< the PAC script
668 public static Proxy detectProxyViaManual() {
669 Proxy ret = new Proxy();
671 ret.httpProxyHost = Platform.getEnv("http_proxy");
672 if (ret.httpProxyHost != null) {
673 if (ret.httpProxyHost.startsWith("http://")) ret.httpProxyHost = ret.httpProxyHost.substring(7);
674 if (ret.httpProxyHost.endsWith("/"))
675 ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.length() - 1);
676 if (ret.httpProxyHost.indexOf(':') != -1) {
677 ret.httpProxyPort = Integer.parseInt(ret.httpProxyHost.substring(ret.httpProxyHost.indexOf(':') + 1));
678 ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.indexOf(':'));
680 ret.httpProxyPort = 80;
684 ret.httpsProxyHost = Platform.getEnv("https_proxy");
685 if (ret.httpsProxyHost != null) {
686 if (ret.httpsProxyHost.startsWith("https://")) ret.httpsProxyHost = ret.httpsProxyHost.substring(7);
687 if (ret.httpsProxyHost.endsWith("/"))
688 ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.length() - 1);
689 if (ret.httpsProxyHost.indexOf(':') != -1) {
690 ret.httpsProxyPort = Integer.parseInt(ret.httpsProxyHost.substring(ret.httpsProxyHost.indexOf(':') + 1));
691 ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.indexOf(':'));
693 ret.httpsProxyPort = 80;
697 ret.socksProxyHost = Platform.getEnv("socks_proxy");
698 if (ret.socksProxyHost != null) {
699 if (ret.socksProxyHost.startsWith("socks://")) ret.socksProxyHost = ret.socksProxyHost.substring(7);
700 if (ret.socksProxyHost.endsWith("/"))
701 ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.length() - 1);
702 if (ret.socksProxyHost.indexOf(':') != -1) {
703 ret.socksProxyPort = Integer.parseInt(ret.socksProxyHost.substring(ret.socksProxyHost.indexOf(':') + 1));
704 ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.indexOf(':'));
706 ret.socksProxyPort = 80;
710 String noproxy = Platform.getEnv("no_proxy");
711 if (noproxy != null) {
712 StringTokenizer st = new StringTokenizer(noproxy, ",");
713 ret.excluded = new String[st.countTokens()];
714 for(int i=0; st.hasMoreTokens(); i++) ret.excluded[i] = st.nextToken();
717 if (ret.httpProxyHost == null && ret.socksProxyHost == null) return null;
721 public static JSScope proxyAutoConfigRootScope = new ProxyAutoConfigRootScope();
722 public static JS getProxyAutoConfigFunction(String url) {
724 BufferedReader br = new BufferedReader(new InputStreamReader(new HTTP(url, true).GET()));
727 while((s = br.readLine()) != null) script += s + "\n";
728 if (Log.on) Log.info(Proxy.class, "successfully retrieved WPAD PAC:");
729 if (Log.on) Log.info(Proxy.class, script);
732 Vector carpHosts = new Vector();
733 for(int i=0; i<script.length(); i++)
734 if (script.regionMatches(i, "new Node(", 0, 9)) {
735 String host = script.substring(i + 10, script.indexOf('\"', i + 11));
736 if (Log.on) Log.info(Proxy.class, "Detected MS Proxy Server CARP Script, Host=" + host);
737 carpHosts.addElement(host);
739 if (carpHosts.size() > 0) {
740 script = "function FindProxyForURL(url, host) {\nreturn \"";
741 for(int i=0; i<carpHosts.size(); i++)
742 script += "PROXY " + carpHosts.elementAt(i) + "; ";
744 if (Log.on) Log.info(Proxy.class, "DeCARPed PAC script:");
745 if (Log.on) Log.info(Proxy.class, script);
748 JS scr = JS.fromReader("PAC script at " + url, 0, new StringReader(script));
749 JS.cloneWithNewParentScope(scr, proxyAutoConfigRootScope).call(null, null, null, null, 0);
750 return (JS)proxyAutoConfigRootScope.get("FindProxyForURL");
751 } catch (Exception e) {
753 Log.info(Platform.class, "WPAD detection failed due to:");
754 if (e instanceof JSExn) {
756 org.ibex.js.JSArray arr = new org.ibex.js.JSArray();
757 arr.addElement(((JSExn)e).getObject());
758 } catch (Exception e2) {
759 Log.info(Platform.class, e);
762 else Log.info(Platform.class, e);
769 // Authorization ///////////////////////////////////////////////////////////////////////////////////
771 public static class Authorization {
773 static public String authorization = null;
774 static public String authorization2 = null;
775 static public Semaphore waitingForUser = new Semaphore();
777 public static synchronized void getPassword(final String realm, final String style,
778 final String proxyIP, String oldAuth) throws IOException {
780 // this handles cases where multiple threads hit the proxy auth at the same time -- all but one will block on the
781 // synchronized keyword. If 'authorization' changed while the thread was blocked, it means that the user entered
782 // a password, so we should reattempt authorization.
784 if (authorization != oldAuth) return;
785 if (Log.on) Log.info(Authorization.class, "displaying proxy authorization dialog");
786 Scheduler.add(new Scheduler.Task() {
787 public void perform() throws IOException, JSExn {
791 //Template.buildTemplate("org/ibex/builtin/proxy_authorization.ibex", Stream.getInputStream((JS)Main.builtin.get("org/ibex/builtin/proxy_authorization.ibex")), new Ibex(null));
793 b.put("realm", realm);
794 b.put("proxyIP", proxyIP);
798 waitingForUser.block();
799 if (Log.on) Log.info(Authorization.class, "got proxy authorization info; re-attempting connection");
804 // ProxyAutoConfigRootJSScope ////////////////////////////////////////////////////////////////////
806 public static class ProxyAutoConfigRootScope extends JSScope.Global {
808 public ProxyAutoConfigRootScope() { super(); }
810 public Object get(Object name) throws JSExn {
812 case "isPlainHostName": return METHOD;
813 case "dnsDomainIs": return METHOD;
814 case "localHostOrDomainIs": return METHOD;
815 case "isResolvable": return METHOD;
816 case "isInNet": return METHOD;
817 case "dnsResolve": return METHOD;
818 case "myIpAddress": return METHOD;
819 case "dnsDomainLevels": return METHOD;
820 case "shExpMatch": return METHOD;
821 case "weekdayRange": return METHOD;
822 case "dateRange": return METHOD;
823 case "timeRange": return METHOD;
824 case "ProxyConfig": return ProxyConfig;
826 return super.get(name);
829 private static final JS proxyConfigBindings = new JS();
830 private static final JS ProxyConfig = new JS() {
831 public Object get(Object name) {
832 if (name.equals("bindings")) return proxyConfigBindings;
837 public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
839 case "isPlainHostName": return (a0.toString().indexOf('.') == -1) ? Boolean.TRUE : Boolean.FALSE;
840 case "dnsDomainIs": return (a0.toString().endsWith(a1.toString())) ? Boolean.TRUE : Boolean.FALSE;
841 case "localHostOrDomainIs":
842 return (a0.equals(a1) || (a0.toString().indexOf('.') == -1 && a1.toString().startsWith(a0.toString()))) ? T:F;
843 case "isResolvable": try {
844 return (InetAddress.getByName(a0.toString()) != null) ? Boolean.TRUE : Boolean.FALSE;
845 } catch (UnknownHostException e) { return F; }
847 if (nargs != 3) return Boolean.FALSE;
849 byte[] host = InetAddress.getByName(a0.toString()).getAddress();
850 byte[] net = InetAddress.getByName(a1.toString()).getAddress();
851 byte[] mask = InetAddress.getByName(a2.toString()).getAddress();
852 return ((host[0] & mask[0]) == net[0] &&
853 (host[1] & mask[1]) == net[1] &&
854 (host[2] & mask[2]) == net[2] &&
855 (host[3] & mask[3]) == net[3]) ?
856 Boolean.TRUE : Boolean.FALSE;
857 } catch (Exception e) {
858 throw new JSExn("exception in isInNet(): " + e);
862 return InetAddress.getByName(a0.toString()).getHostAddress();
863 } catch (UnknownHostException e) {
868 return InetAddress.getLocalHost().getHostAddress();
869 } catch (UnknownHostException e) {
870 if (Log.on) Log.info(this, "strange... host does not know its own address");
873 case "dnsDomainLevels":
874 String s = a0.toString();
876 while((i = s.indexOf('.', i)) != -1) i++;
877 return new Integer(i);
879 StringTokenizer st = new StringTokenizer(a1.toString(), "*", false);
880 String[] arr = new String[st.countTokens()];
881 String s = a0.toString();
882 for (int i=0; st.hasMoreTokens(); i++) arr[i] = st.nextToken();
883 return match(arr, s, 0) ? Boolean.TRUE : Boolean.FALSE;
885 TimeZone tz = (nargs < 3 || a2 == null || !a2.equals("GMT")) ?
886 TimeZone.getTimeZone("UTC") : TimeZone.getDefault();
887 Calendar c = new GregorianCalendar();
889 c.setTime(new java.util.Date());
890 java.util.Date d = c.getTime();
891 int day = d.getDay();
892 String d1s = a0.toString().toUpperCase();
894 for(int i=0; i<days.length; i++) if (days[i].equals(d1s)) d1 = i;
897 return d1 == day ? Boolean.TRUE : Boolean.FALSE;
899 String d2s = a1.toString().toUpperCase();
900 for(int i=0; i<days.length; i++) if (days[i].equals(d2s)) d2 = i;
902 return ((d1 <= d2 && day >= d1 && day <= d2) || (d1 > d2 && (day >= d1 || day <= d2))) ? T : F;
904 case "dateRange": throw new JSExn("Ibex does not support dateRange() in PAC scripts");
905 case "timeRange": throw new JSExn("Ibex does not support timeRange() in PAC scripts");
907 return super.callMethod(method, a0, a1, a2, rest, nargs);
909 private static boolean match(String[] arr, String s, int index) {
910 if (index >= arr.length) return true;
911 for(int i=0; i<s.length(); i++) {
912 String s2 = s.substring(i);
913 if (s2.startsWith(arr[index]) && match(arr, s2.substring(arr[index].length()), index + 1)) return true;
917 public static String[] days = { "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };
922 * An implementation of Microsoft's proprietary NTLM authentication protocol. This code was derived from Eric
923 * Glass's work, and is copyright as follows:
925 * Copyright (c) 2003 Eric Glass (eglass1 at comcast.net).
927 * Permission to use, copy, modify, and distribute this document for any purpose and without any fee is hereby
928 * granted, provided that the above copyright notice and this list of conditions appear in all copies.
929 * The most current version of this document may be obtained from http://davenport.sourceforge.net/ntlm.html .
931 public static class NTLM {
933 public static final byte[] type1 = new byte[] { 0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01,
934 0x00, 0x00, 0x00, 0x00, 0x02, 0x02, 0x00 };
937 * Calculates the NTLM Response for the given challenge, using the
938 * specified password.
940 * @param password The user's password.
941 * @param challenge The Type 2 challenge from the server.
943 * @return The NTLM Response.
945 public static byte[] getNTLMResponse(String password, byte[] challenge)
946 throws UnsupportedEncodingException {
947 byte[] ntlmHash = ntlmHash(password);
948 return lmResponse(ntlmHash, challenge);
952 * Calculates the LM Response for the given challenge, using the specified
955 * @param password The user's password.
956 * @param challenge The Type 2 challenge from the server.
958 * @return The LM Response.
960 public static byte[] getLMResponse(String password, byte[] challenge)
962 byte[] lmHash = lmHash(password);
963 return lmResponse(lmHash, challenge);
967 * Calculates the NTLMv2 Response for the given challenge, using the
968 * specified authentication target, username, password, target information
969 * block, and client challenge.
971 * @param target The authentication target (i.e., domain).
972 * @param user The username.
973 * @param password The user's password.
974 * @param targetInformation The target information block from the Type 2
976 * @param challenge The Type 2 challenge from the server.
977 * @param clientChallenge The random 8-byte client challenge.
979 * @return The NTLMv2 Response.
981 public static byte[] getNTLMv2Response(String target, String user,
982 String password, byte[] targetInformation, byte[] challenge,
983 byte[] clientChallenge) throws UnsupportedEncodingException {
984 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
985 byte[] blob = createBlob(targetInformation, clientChallenge);
986 return lmv2Response(ntlmv2Hash, blob, challenge);
990 * Calculates the LMv2 Response for the given challenge, using the
991 * specified authentication target, username, password, and client
994 * @param target The authentication target (i.e., domain).
995 * @param user The username.
996 * @param password The user's password.
997 * @param challenge The Type 2 challenge from the server.
998 * @param clientChallenge The random 8-byte client challenge.
1000 * @return The LMv2 Response.
1002 public static byte[] getLMv2Response(String target, String user,
1003 String password, byte[] challenge, byte[] clientChallenge)
1004 throws UnsupportedEncodingException {
1005 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
1006 return lmv2Response(ntlmv2Hash, clientChallenge, challenge);
1010 * Calculates the NTLM2 Session Response for the given challenge, using the
1011 * specified password and client challenge.
1013 * @param password The user's password.
1014 * @param challenge The Type 2 challenge from the server.
1015 * @param clientChallenge The random 8-byte client challenge.
1017 * @return The NTLM2 Session Response. This is placed in the NTLM
1018 * response field of the Type 3 message; the LM response field contains
1019 * the client challenge, null-padded to 24 bytes.
1021 public static byte[] getNTLM2SessionResponse(String password,
1022 byte[] challenge, byte[] clientChallenge) throws UnsupportedEncodingException {
1023 byte[] ntlmHash = ntlmHash(password);
1024 MD5Digest md5 = new MD5Digest();
1025 md5.update(challenge, 0, challenge.length);
1026 md5.update(clientChallenge, 0, clientChallenge.length);
1027 byte[] sessionHash = new byte[8];
1028 byte[] md5_out = new byte[md5.getDigestSize()];
1029 md5.doFinal(md5_out, 0);
1030 System.arraycopy(md5_out, 0, sessionHash, 0, 8);
1031 return lmResponse(ntlmHash, sessionHash);
1035 * Creates the LM Hash of the user's password.
1037 * @param password The password.
1039 * @return The LM Hash of the given password, used in the calculation
1040 * of the LM Response.
1042 private static byte[] lmHash(String password) {
1044 byte[] oemPassword = password.toUpperCase().getBytes("UTF8");
1045 int length = java.lang.Math.min(oemPassword.length, 14);
1046 byte[] keyBytes = new byte[14];
1047 System.arraycopy(oemPassword, 0, keyBytes, 0, length);
1048 Key lowKey = createDESKey(keyBytes, 0);
1049 Key highKey = createDESKey(keyBytes, 7);
1050 byte[] magicConstant = "KGS!@#$%".getBytes("UTF8");
1051 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1052 des.init(Cipher.ENCRYPT_MODE, lowKey);
1053 byte[] lowHash = des.doFinal(magicConstant);
1054 des.init(Cipher.ENCRYPT_MODE, highKey);
1055 byte[] highHash = des.doFinal(magicConstant);
1056 byte[] lmHash = new byte[16];
1057 System.arraycopy(lowHash, 0, lmHash, 0, 8);
1058 System.arraycopy(highHash, 0, lmHash, 8, 8);
1065 * Creates the NTLM Hash of the user's password.
1067 * @param password The password.
1069 * @return The NTLM Hash of the given password, used in the calculation
1070 * of the NTLM Response and the NTLMv2 and LMv2 Hashes.
1072 private static byte[] ntlmHash(String password) throws UnsupportedEncodingException {
1073 byte[] unicodePassword = password.getBytes("UnicodeLittleUnmarked");
1074 MD4Digest md4 = new MD4Digest();
1075 md4.update(unicodePassword, 0, unicodePassword.length);
1076 byte[] ret = new byte[md4.getDigestSize()];
1081 * Creates the NTLMv2 Hash of the user's password.
1083 * @param target The authentication target (i.e., domain).
1084 * @param user The username.
1085 * @param password The password.
1087 * @return The NTLMv2 Hash, used in the calculation of the NTLMv2
1088 * and LMv2 Responses.
1090 private static byte[] ntlmv2Hash(String target, String user,
1091 String password) throws UnsupportedEncodingException {
1092 byte[] ntlmHash = ntlmHash(password);
1093 String identity = user.toUpperCase() + target.toUpperCase();
1094 return hmacMD5(identity.getBytes("UnicodeLittleUnmarked"), ntlmHash);
1098 * Creates the LM Response from the given hash and Type 2 challenge.
1100 * @param hash The LM or NTLM Hash.
1101 * @param challenge The server challenge from the Type 2 message.
1103 * @return The response (either LM or NTLM, depending on the provided
1106 private static byte[] lmResponse(byte[] hash, byte[] challenge)
1109 byte[] keyBytes = new byte[21];
1110 System.arraycopy(hash, 0, keyBytes, 0, 16);
1111 Key lowKey = createDESKey(keyBytes, 0);
1112 Key middleKey = createDESKey(keyBytes, 7);
1113 Key highKey = createDESKey(keyBytes, 14);
1114 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1115 des.init(Cipher.ENCRYPT_MODE, lowKey);
1116 byte[] lowResponse = des.doFinal(challenge);
1117 des.init(Cipher.ENCRYPT_MODE, middleKey);
1118 byte[] middleResponse = des.doFinal(challenge);
1119 des.init(Cipher.ENCRYPT_MODE, highKey);
1120 byte[] highResponse = des.doFinal(challenge);
1121 byte[] lmResponse = new byte[24];
1122 System.arraycopy(lowResponse, 0, lmResponse, 0, 8);
1123 System.arraycopy(middleResponse, 0, lmResponse, 8, 8);
1124 System.arraycopy(highResponse, 0, lmResponse, 16, 8);
1131 * Creates the LMv2 Response from the given hash, client data, and
1134 * @param hash The NTLMv2 Hash.
1135 * @param clientData The client data (blob or client challenge).
1136 * @param challenge The server challenge from the Type 2 message.
1138 * @return The response (either NTLMv2 or LMv2, depending on the
1141 private static byte[] lmv2Response(byte[] hash, byte[] clientData,
1143 byte[] data = new byte[challenge.length + clientData.length];
1144 System.arraycopy(challenge, 0, data, 0, challenge.length);
1145 System.arraycopy(clientData, 0, data, challenge.length,
1147 byte[] mac = hmacMD5(data, hash);
1148 byte[] lmv2Response = new byte[mac.length + clientData.length];
1149 System.arraycopy(mac, 0, lmv2Response, 0, mac.length);
1150 System.arraycopy(clientData, 0, lmv2Response, mac.length,
1152 return lmv2Response;
1156 * Creates the NTLMv2 blob from the given target information block and
1159 * @param targetInformation The target information block from the Type 2
1161 * @param clientChallenge The random 8-byte client challenge.
1163 * @return The blob, used in the calculation of the NTLMv2 Response.
1165 private static byte[] createBlob(byte[] targetInformation,
1166 byte[] clientChallenge) {
1167 byte[] blobSignature = new byte[] {
1168 (byte) 0x01, (byte) 0x01, (byte) 0x00, (byte) 0x00
1170 byte[] reserved = new byte[] {
1171 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1173 byte[] unknown1 = new byte[] {
1174 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1176 byte[] unknown2 = new byte[] {
1177 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1179 long time = System.currentTimeMillis();
1180 time += 11644473600000l; // milliseconds from January 1, 1601 -> epoch.
1181 time *= 10000; // tenths of a microsecond.
1182 // convert to little-endian byte array.
1183 byte[] timestamp = new byte[8];
1184 for (int i = 0; i < 8; i++) {
1185 timestamp[i] = (byte) time;
1188 byte[] blob = new byte[blobSignature.length + reserved.length +
1189 timestamp.length + clientChallenge.length +
1190 unknown1.length + targetInformation.length +
1193 System.arraycopy(blobSignature, 0, blob, offset, blobSignature.length);
1194 offset += blobSignature.length;
1195 System.arraycopy(reserved, 0, blob, offset, reserved.length);
1196 offset += reserved.length;
1197 System.arraycopy(timestamp, 0, blob, offset, timestamp.length);
1198 offset += timestamp.length;
1199 System.arraycopy(clientChallenge, 0, blob, offset,
1200 clientChallenge.length);
1201 offset += clientChallenge.length;
1202 System.arraycopy(unknown1, 0, blob, offset, unknown1.length);
1203 offset += unknown1.length;
1204 System.arraycopy(targetInformation, 0, blob, offset,
1205 targetInformation.length);
1206 offset += targetInformation.length;
1207 System.arraycopy(unknown2, 0, blob, offset, unknown2.length);
1212 * Calculates the HMAC-MD5 hash of the given data using the specified
1215 * @param data The data for which the hash will be calculated.
1216 * @param key The hashing key.
1218 * @return The HMAC-MD5 hash of the given data.
1220 private static byte[] hmacMD5(byte[] data, byte[] key) {
1221 byte[] ipad = new byte[64];
1222 byte[] opad = new byte[64];
1223 for (int i = 0; i < 64; i++) {
1224 ipad[i] = (byte) 0x36;
1225 opad[i] = (byte) 0x5c;
1227 for (int i = key.length - 1; i >= 0; i--) {
1231 byte[] content = new byte[data.length + 64];
1232 System.arraycopy(ipad, 0, content, 0, 64);
1233 System.arraycopy(data, 0, content, 64, data.length);
1234 MD5Digest md5 = new MD5Digest();
1235 md5.update(content, 0, content.length);
1236 data = new byte[md5.getDigestSize()];
1237 md5.doFinal(data, 0);
1238 content = new byte[data.length + 64];
1239 System.arraycopy(opad, 0, content, 0, 64);
1240 System.arraycopy(data, 0, content, 64, data.length);
1241 md5 = new MD5Digest();
1242 md5.update(content, 0, content.length);
1243 byte[] ret = new byte[md5.getDigestSize()];
1244 md5.doFinal(ret, 0);
1249 * Creates a DES encryption key from the given key material.
1251 * @param bytes A byte array containing the DES key material.
1252 * @param offset The offset in the given byte array at which
1253 * the 7-byte key material starts.
1255 * @return A DES encryption key created from the key material
1256 * starting at the specified offset in the given byte array.
1259 private static Key createDESKey(byte[] bytes, int offset) {
1260 byte[] keyBytes = new byte[7];
1261 System.arraycopy(bytes, offset, keyBytes, 0, 7);
1262 byte[] material = new byte[8];
1263 material[0] = keyBytes[0];
1264 material[1] = (byte) (keyBytes[0] << 7 | (keyBytes[1] & 0xff) >>> 1);
1265 material[2] = (byte) (keyBytes[1] << 6 | (keyBytes[2] & 0xff) >>> 2);
1266 material[3] = (byte) (keyBytes[2] << 5 | (keyBytes[3] & 0xff) >>> 3);
1267 material[4] = (byte) (keyBytes[3] << 4 | (keyBytes[4] & 0xff) >>> 4);
1268 material[5] = (byte) (keyBytes[4] << 3 | (keyBytes[5] & 0xff) >>> 5);
1269 material[6] = (byte) (keyBytes[5] << 2 | (keyBytes[6] & 0xff) >>> 6);
1270 material[7] = (byte) (keyBytes[6] << 1);
1271 oddParity(material);
1272 return new SecretKeySpec(material, "DES");
1277 * Applies odd parity to the given byte array.
1279 * @param bytes The data whose parity bits are to be adjusted for
1282 private static void oddParity(byte[] bytes) {
1283 for (int i = 0; i < bytes.length; i++) {
1285 boolean needsParity = (((b >>> 7) ^ (b >>> 6) ^ (b >>> 5) ^
1286 (b >>> 4) ^ (b >>> 3) ^ (b >>> 2) ^
1287 (b >>> 1)) & 0x01) == 0;
1289 bytes[i] |= (byte) 0x01;
1291 bytes[i] &= (byte) 0xfe;