1 // Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
7 import org.ibex.util.*;
8 import org.ibex.crypto.*;
11 * This object encapsulates a *single* HTTP connection. Multiple requests may be pipelined over a connection (thread-safe),
12 * although any IOException encountered in a request will invalidate all later requests.
16 public static InetAddress originAddr = null;
17 public static String originHost = null;
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 (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(originAddr))
161 throw new HTTPException("security violation: " + host + " [" + addr.getHostAddress() +
162 "] is in a firewalled netblock");
164 } catch (UnknownHostException uhe) { }
167 if (Platform.detectProxy() == null)
168 throw new HTTPException("could not resolve hostname \"" + host + "\" and no proxy configured");
173 // Methods to attempt socket creation /////////////////////////////////////////////////////////////////
175 private Socket getSocket(String host, int port, boolean ssl, boolean negotiate) throws IOException {
176 Socket ret = ssl ? new SSL(host, port, negotiate) : new Socket(java.net.InetAddress.getByName(host), port);
177 ret.setTcpNoDelay(true);
181 /** Attempts a direct connection */
182 private Socket attemptDirect() {
184 Log.info(this, "attempting to create unproxied socket to " +
185 host + ":" + port + (ssl ? " [ssl]" : ""));
186 return getSocket(host, port, ssl, true);
187 } catch (IOException e) {
188 if (Log.on) Log.info(this, "exception in attemptDirect(): " + e);
193 /** Attempts to use an HTTP proxy, employing the CONNECT method if HTTPS is requested */
194 private Socket attemptHttpProxy(String proxyHost, int proxyPort) {
196 if (Log.verbose) Log.info(this, "attempting to create HTTP proxied socket using proxy " + proxyHost + ":" + proxyPort);
197 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
200 if (!path.startsWith("http://")) path = "http://" + host + ":" + port + path;
204 PrintWriter pw = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
205 BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
206 pw.print("CONNECT " + host + ":" + port + " HTTP/1.1\r\n\r\n");
208 String s = br.readLine();
209 if (s.charAt(9) != '2') throw new HTTPException("proxy refused CONNECT method: \"" + s + "\"");
210 while (br.readLine().length() > 0) { };
211 ((SSL)sock).negotiate();
214 } catch (IOException e) {
215 if (Log.on) Log.info(this, "exception in attemptHttpProxy(): " + e);
221 * Implements SOCKSv4 with v4a DNS extension
222 * @see http://www.socks.nec.com/protocol/socks4.protocol
223 * @see http://www.socks.nec.com/protocol/socks4a.protocol
225 private Socket attemptSocksProxy(String proxyHost, int proxyPort) {
227 // even if host is already a "x.y.z.w" string, we use this to parse it into bytes
228 InetAddress addr = null;
229 try { addr = InetAddress.getByName(host); } catch (Exception e) { }
231 if (Log.verbose) Log.info(this, "attempting to create SOCKSv4" + (addr == null ? "" : "a") +
232 " proxied socket using proxy " + proxyHost + ":" + proxyPort);
235 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
237 DataOutputStream dos = new DataOutputStream(sock.getOutputStream());
238 dos.writeByte(0x04); // SOCKSv4(a)
239 dos.writeByte(0x01); // CONNECT
240 dos.writeShort(port & 0xffff); // port
241 if (addr == null) dos.writeInt(0x00000001); // bogus IP
242 else dos.write(addr.getAddress()); // actual IP
243 dos.writeByte(0x00); // no userid
245 PrintWriter pw = new PrintWriter(new OutputStreamWriter(dos));
248 dos.writeByte(0x00); // hostname null terminator
252 DataInputStream dis = new DataInputStream(sock.getInputStream());
253 dis.readByte(); // reply version
254 byte success = dis.readByte(); // success/fail
255 dis.skip(6); // ip/port
257 if ((int)(success & 0xff) == 90) {
258 if (ssl) ((SSL)sock).negotiate();
261 if (Log.on) Log.info(this, "SOCKS server denied access, code " + (success & 0xff));
264 } catch (IOException e) {
265 if (Log.on) Log.info(this, "exception in attemptSocksProxy(): " + e);
270 /** executes the PAC script and dispatches a call to one of the other attempt methods based on the result */
272 private Socket attemptPAC(org.ibex.js.JS pacFunc) {
273 if (Log.verbose) Log.info(this, "evaluating PAC script");
276 Object obj = pacFunc.call(url, host, null, null, 2);
277 if (Log.verbose) Log.info(this, " PAC script returned \"" + obj + "\"");
278 pac = obj.toString();
279 } catch (Throwable e) {
280 if (Log.on) Log.info(this, "PAC script threw exception " + e);
284 StringTokenizer st = new StringTokenizer(pac, ";", false);
285 while (st.hasMoreTokens()) {
286 String token = st.nextToken().trim();
287 if (Log.verbose) Log.info(this, " trying \"" + token + "\"...");
290 if (token.startsWith("DIRECT"))
291 ret = attemptDirect();
292 else if (token.startsWith("PROXY"))
293 ret = attemptHttpProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
294 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
295 else if (token.startsWith("SOCKS"))
296 ret = attemptSocksProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
297 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
298 if (ret != null) return ret;
299 } catch (Throwable e) {
300 if (Log.on) Log.info(this, "attempt at \"" + token + "\" failed due to " + e + "; trying next token");
303 if (Log.on) Log.info(this, "all PAC results exhausted");
308 // Everything Else ////////////////////////////////////////////////////////////////////////////
310 private synchronized void connect() throws IOException {
311 if (originalUrl.equals("stdio:")) { in = new BufferedInputStream(System.in); return; }
313 if (in == null) in = new BufferedInputStream(sock.getInputStream());
316 // grab the userinfo; gcj doesn't have java.net.URL.getUserInfo()
317 String url = originalUrl;
318 userInfo = url.substring(url.indexOf("://") + 3);
319 userInfo = userInfo.indexOf('/') == -1 ? userInfo : userInfo.substring(0, userInfo.indexOf('/'));
320 if (userInfo.indexOf('@') != -1) {
321 userInfo = userInfo.substring(0, userInfo.indexOf('@'));
322 url = url.substring(0, url.indexOf("://") + 3) + url.substring(url.indexOf('@') + 1);
327 if (url.startsWith("https:")) {
329 } else if (!url.startsWith("http:")) {
330 throw new IOException("HTTP only supports http/https urls");
332 if (url.indexOf("://") == -1) throw new IOException("URLs must contain a ://");
333 String temphost = url.substring(url.indexOf("://") + 3);
334 path = temphost.substring(temphost.indexOf('/'));
335 temphost = temphost.substring(0, temphost.indexOf('/'));
336 if (temphost.indexOf(':') != -1) {
337 port = Integer.parseInt(temphost.substring(temphost.indexOf(':')+1));
338 temphost = temphost.substring(0, temphost.indexOf(':'));
340 port = ssl ? 443 : 80;
342 if (!skipResolveCheck) resolveAndCheckIfFirewalled(temphost);
344 if (Log.verbose) Log.info(this, "creating HTTP object for connection to " + host + ":" + port);
347 Proxy pi = Platform.detectProxy();
350 for(int i=0; i<pi.excluded.length; i++) if (host.equals(pi.excluded[i])) break OUTER;
351 if (sock == null && pi.proxyAutoConfigFunction != null) sock = attemptPAC(pi.proxyAutoConfigFunction);
352 if (sock == null && ssl && pi.httpsProxyHost != null) sock = attemptHttpProxy(pi.httpsProxyHost,pi.httpsProxyPort);
353 if (sock == null && pi.httpProxyHost != null) sock = attemptHttpProxy(pi.httpProxyHost, pi.httpProxyPort);
354 if (sock == null && pi.socksProxyHost != null) sock = attemptSocksProxy(pi.socksProxyHost, pi.socksProxyPort);
358 proxied = sock != null;
359 if (sock == null) sock = attemptDirect();
360 if (sock == null) throw new HTTPException("unable to contact host " + host);
361 if (in == null) in = new BufferedInputStream(sock.getInputStream());
364 private void sendRequest(String contentType, String content) throws IOException {
365 PrintWriter pw = new PrintWriter(new OutputStreamWriter(originalUrl.equals("stdio:") ?
366 System.out : sock.getOutputStream()));
367 if (content != null) {
368 pw.print("POST " + path + " HTTP/1.0\r\n"); // FIXME chunked encoding
369 int contentLength = content.substring(0, 2).equals("\r\n") ?
370 content.length() - 2 :
371 (content.length() - content.indexOf("\r\n\r\n") - 4);
372 pw.print("Content-Length: " + contentLength + "\r\n");
373 if (contentType != null) pw.print("Content-Type: " + contentType + "\r\n");
375 pw.print("GET " + path + " HTTP/1.1\r\n");
378 pw.print("User-Agent: Ibex\r\n");
379 pw.print("Accept-encoding: gzip\r\n");
380 pw.print("Host: " + (host + (port == 80 ? "" : (":" + port))) + "\r\n");
381 if (proxied) pw.print("X-RequestOrigin: " + originHost + "\r\n");
383 if (Proxy.Authorization.authorization != null) pw.print("Proxy-Authorization: "+Proxy.Authorization.authorization2+"\r\n");
384 if (authCache.get(originalUrl) != null) pw.print("Authorization: " + authCache.get(originalUrl) + "\r\n");
386 pw.print(content == null ? "\r\n" : content);
391 private void doWebAuth(Hashtable h0, String method) throws IOException {
392 if (userInfo == null) throw new HTTPException("web server demanded username/password, but none were supplied");
393 Hashtable h = parseAuthenticationChallenge(h0.get("www-authenticate").toString());
395 if (h.get("AUTHTYPE").equals("Basic")) {
396 if (authCache.get(originalUrl) != null) throw new HTTPException("username/password rejected");
397 authCache.put(originalUrl, "Basic " + new String(Base64.encode(userInfo.getBytes("UTF8"))));
399 } else if (h.get("AUTHTYPE").equals("Digest")) {
400 if (authCache.get(originalUrl) != null && !"true".equals(h.get("stale")))
401 throw new HTTPException("username/password rejected");
403 if (path2.startsWith("http://") || path2.startsWith("https://")) {
404 path2 = path2.substring(path2.indexOf("://") + 3);
405 path2 = path2.substring(path2.indexOf('/'));
407 String A1 = userInfo.substring(0, userInfo.indexOf(':')) + ":" + h.get("realm") + ":" +
408 userInfo.substring(userInfo.indexOf(':') + 1);
409 String A2 = method + ":" + path2;
410 authCache.put(originalUrl,
412 "username=\"" + userInfo.substring(0, userInfo.indexOf(':')) + "\", " +
413 "realm=\"" + h.get("realm") + "\", " +
414 "nonce=\"" + h.get("nonce") + "\", " +
415 "uri=\"" + path2 + "\", " +
416 (h.get("opaque") == null ? "" : ("opaque=\"" + h.get("opaque") + "\", ")) +
417 "response=\"" + H(H(A1) + ":" + h.get("nonce") + ":" + H(A2)) + "\", " +
422 throw new HTTPException("unknown authentication type: " + h.get("AUTHTYPE"));
426 private void doProxyAuth(Hashtable h0, String method) throws IOException {
427 if (Log.on) Log.info(this, "Proxy AuthChallenge: " + h0.get("proxy-authenticate"));
428 Hashtable h = parseAuthenticationChallenge(h0.get("proxy-authenticate").toString());
429 String style = h.get("AUTHTYPE").toString();
430 String realm = (String)h.get("realm");
432 if (style.equals("NTLM") && Proxy.Authorization.authorization2 == null) {
433 Log.info(this, "Proxy identified itself as NTLM, sending Type 1 packet");
434 Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(Proxy.NTLM.type1);
438 if (!realm.equals("Digest") || Proxy.Authorization.authorization2 == null || !"true".equals(h.get("stale")))
439 Proxy.Authorization.getPassword(realm, style, sock.getInetAddress().getHostAddress(),
440 Proxy.Authorization.authorization);
442 if (style.equals("Basic")) {
443 Proxy.Authorization.authorization2 =
444 "Basic " + new String(Base64.encode(Proxy.Authorization.authorization.getBytes("UTF8")));
446 } else if (style.equals("Digest")) {
447 String A1 = Proxy.Authorization.authorization.substring(0, userInfo.indexOf(':')) + ":" + h.get("realm") + ":" +
448 Proxy.Authorization.authorization.substring(Proxy.Authorization.authorization.indexOf(':') + 1);
449 String A2 = method + ":" + path;
450 Proxy.Authorization.authorization2 =
452 "username=\"" + Proxy.Authorization.authorization.substring(0, Proxy.Authorization.authorization.indexOf(':')) +
454 "realm=\"" + h.get("realm") + "\", " +
455 "nonce=\"" + h.get("nonce") + "\", " +
456 "uri=\"" + path + "\", " +
457 (h.get("opaque") == null ? "" : ("opaque=\"" + h.get("opaque") + "\", ")) +
458 "response=\"" + H(H(A1) + ":" + h.get("nonce") + ":" + H(A2)) + "\", " +
461 } else if (style.equals("NTLM")) {
462 Log.info(this, "Proxy identified itself as NTLM, got Type 2 packet");
463 byte[] type2 = Base64.decode(((String)h0.get("proxy-authenticate")).substring(5).trim());
464 for(int i=0; i<type2.length; i += 4) {
466 if (i<type2.length) log += Integer.toString(type2[i] & 0xff, 16) + " ";
467 if (i+1<type2.length) log += Integer.toString(type2[i+1] & 0xff, 16) + " ";
468 if (i+2<type2.length) log += Integer.toString(type2[i+2] & 0xff, 16) + " ";
469 if (i+3<type2.length) log += Integer.toString(type2[i+3] & 0xff, 16) + " ";
472 // FEATURE: need to keep the connection open between type1 and type3
473 // FEATURE: finish this
474 //byte[] type3 = Proxy.NTLM.getResponse(
475 //Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(type3));
480 // HTTPInputStream ///////////////////////////////////////////////////////////////////////////////////
482 /** An input stream that represents a subset of a longer input stream. Supports HTTP chunking as well */
483 public class HTTPInputStream extends FilterInputStream implements KnownLength {
485 private int length = 0; ///< if chunking, numbytes left in this subset; else the remainder of the chunk
486 private Semaphore releaseMe = null; ///< this semaphore will be released when the stream is closed
487 boolean chunkedDone = false; ///< indicates that we have encountered the zero-length terminator chunk
488 boolean firstChunk = true; ///< if we're on the first chunk, we don't pre-read a CRLF
489 private int contentLength = 0; ///< the length of the entire content body; -1 if chunked
491 HTTPInputStream(InputStream in, int length, Semaphore releaseMe) throws IOException {
493 this.releaseMe = releaseMe;
494 this.contentLength = length;
495 this.length = length == -1 ? 0 : length;
498 public int getLength() { return contentLength; }
499 public boolean markSupported() { return false; }
500 public int read(byte[] b) throws IOException { return read(b, 0, b.length); }
501 public long skip(long n) throws IOException { return read(null, -1, (int)n); }
502 public int available() throws IOException {
503 if (contentLength == -1) return java.lang.Math.min(super.available(), length);
504 return super.available();
507 public int read() throws IOException {
508 byte[] b = new byte[1];
509 int ret = read(b, 0, 1);
510 return ret == -1 ? -1 : b[0] & 0xff;
513 private void readChunk() throws IOException {
514 if (chunkedDone) return;
515 if (!firstChunk) super.skip(2); // CRLF
517 String chunkLen = "";
519 int i = super.read();
520 if (i == -1) throw new HTTPException("encountered end of stream while reading chunk length");
522 // FEATURE: handle chunking extensions
530 length = Integer.parseInt(chunkLen.trim(), 16);
531 if (length == 0) chunkedDone = true;
534 public int read(byte[] b, int off, int len) throws IOException {
535 boolean good = false;
537 if (length == 0 && contentLength == -1) {
539 if (chunkedDone) { good = true; return -1; }
541 if (length == 0) { good = true; return -1; }
543 if (len > length) len = length;
544 int ret = b == null ? (int)super.skip(len) : super.read(b, off, len);
555 public void close() throws IOException {
556 if (contentLength == -1) {
557 while(!chunkedDone) {
558 if (length != 0) skip(length);
563 if (length != 0) skip(length);
565 if (releaseMe != null) releaseMe.release();
576 // Misc Helpers ///////////////////////////////////////////////////////////////////////////////////
578 /** reads a set of HTTP headers off of the input stream, returning null if the stream is already at its end */
579 private Hashtable parseHeaders(InputStream in) throws IOException {
580 Hashtable ret = new Hashtable();
582 // we can't use a BufferedReader directly on the input stream, since it will buffer past the end of the headers
583 byte[] buf = new byte[4096];
586 int read = in.read();
587 if (read == -1 && buflen == 0) return null;
588 if (read == -1) throw new HTTPException("stream closed while reading headers");
589 buf[buflen++] = (byte)read;
590 if (buflen >= 4 && buf[buflen - 4] == '\r' && buf[buflen - 3] == '\n' &&
591 buf[buflen - 2] == '\r' && buf[buflen - 1] == '\n')
593 if (buflen >=2 && buf[buflen - 1] == '\n' && buf[buflen - 2] == '\n')
594 break; // nice for people using stdio
595 if (buflen == buf.length) {
596 byte[] newbuf = new byte[buf.length * 2];
597 System.arraycopy(buf, 0, newbuf, 0, buflen);
602 BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(buf, 0, buflen)));
603 String s = br.readLine();
604 if (!s.startsWith("HTTP/")) throw new HTTPException("Expected reply to start with \"HTTP/\", got: " + s);
605 ret.put("STATUSLINE", s.substring(s.indexOf(' ') + 1));
606 ret.put("HTTP", s.substring(5, s.indexOf(' ')));
608 while((s = br.readLine()) != null && s.length() > 0) {
609 String front = s.substring(0, s.indexOf(':')).toLowerCase();
610 String back = s.substring(s.indexOf(':') + 1).trim();
611 // ugly hack: we never replace a Digest-auth with a Basic-auth (proxy + www)
612 if (front.endsWith("-authenticate") && ret.get(front) != null && !back.equals("Digest")) continue;
613 ret.put(front, back);
618 private Hashtable parseAuthenticationChallenge(String s) {
619 Hashtable ret = new Hashtable();
622 ret.put("AUTHTYPE", s.substring(0, s.indexOf(' ')));
623 s = s.substring(s.indexOf(' ')).trim();
625 while (s.length() > 0) {
627 String key = s.substring(0, s.indexOf('='));
628 s = s.substring(s.indexOf('=') + 1);
629 if (s.charAt(0) == '\"') {
631 val = s.substring(0, s.indexOf('\"'));
632 s = s.substring(s.indexOf('\"') + 1);
634 val = s.indexOf(',') == -1 ? s : s.substring(0, s.indexOf(','));
635 s = s.indexOf(',') == -1 ? "" : s.substring(s.indexOf(',') + 1);
637 if (s.length() > 0 && s.charAt(0) == ',') s = s.substring(1);
644 private String H(String s) throws IOException {
645 byte[] b = s.getBytes("UTF8");
647 md5.update(b, 0, b.length);
648 byte[] out = new byte[md5.getDigestSize()];
651 for(int i=0; i<out.length; i++) {
652 ret += "0123456789abcdef".charAt((out[i] & 0xf0) >> 4);
653 ret += "0123456789abcdef".charAt(out[i] & 0x0f);
659 // Proxy ///////////////////////////////////////////////////////////
661 /** encapsulates most of the proxy logic; some is shared in HTTP.java */
662 public static class Proxy {
664 public String httpProxyHost = null; ///< the HTTP Proxy host to use
665 public int httpProxyPort = -1; ///< the HTTP Proxy port to use
666 public String httpsProxyHost = null; ///< seperate proxy for HTTPS
667 public int httpsProxyPort = -1;
668 public String socksProxyHost = null; ///< the SOCKS Proxy Host to use
669 public int socksProxyPort = -1; ///< the SOCKS Proxy Port to use
670 public String[] excluded = new String[] { }; ///< hosts to be excluded from proxy use; wildcards permitted
672 // ** temporarily disabled so HTTP does not depend on org.ibex.js **
673 //public JS proxyAutoConfigFunction = null; ///< the PAC script
674 public Object proxyAutoConfigFunction = null; ///< the PAC script
676 public static Proxy detectProxyViaManual() {
677 Proxy ret = new Proxy();
679 ret.httpProxyHost = Platform.getEnv("http_proxy");
680 if (ret.httpProxyHost != null) {
681 if (ret.httpProxyHost.startsWith("http://")) ret.httpProxyHost = ret.httpProxyHost.substring(7);
682 if (ret.httpProxyHost.endsWith("/"))
683 ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.length() - 1);
684 if (ret.httpProxyHost.indexOf(':') != -1) {
685 ret.httpProxyPort = Integer.parseInt(ret.httpProxyHost.substring(ret.httpProxyHost.indexOf(':') + 1));
686 ret.httpProxyHost = ret.httpProxyHost.substring(0, ret.httpProxyHost.indexOf(':'));
688 ret.httpProxyPort = 80;
692 ret.httpsProxyHost = Platform.getEnv("https_proxy");
693 if (ret.httpsProxyHost != null) {
694 if (ret.httpsProxyHost.startsWith("https://")) ret.httpsProxyHost = ret.httpsProxyHost.substring(7);
695 if (ret.httpsProxyHost.endsWith("/"))
696 ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.length() - 1);
697 if (ret.httpsProxyHost.indexOf(':') != -1) {
698 ret.httpsProxyPort = Integer.parseInt(ret.httpsProxyHost.substring(ret.httpsProxyHost.indexOf(':') + 1));
699 ret.httpsProxyHost = ret.httpsProxyHost.substring(0, ret.httpsProxyHost.indexOf(':'));
701 ret.httpsProxyPort = 80;
705 ret.socksProxyHost = Platform.getEnv("socks_proxy");
706 if (ret.socksProxyHost != null) {
707 if (ret.socksProxyHost.startsWith("socks://")) ret.socksProxyHost = ret.socksProxyHost.substring(7);
708 if (ret.socksProxyHost.endsWith("/"))
709 ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.length() - 1);
710 if (ret.socksProxyHost.indexOf(':') != -1) {
711 ret.socksProxyPort = Integer.parseInt(ret.socksProxyHost.substring(ret.socksProxyHost.indexOf(':') + 1));
712 ret.socksProxyHost = ret.socksProxyHost.substring(0, ret.socksProxyHost.indexOf(':'));
714 ret.socksProxyPort = 80;
718 String noproxy = Platform.getEnv("no_proxy");
719 if (noproxy != null) {
720 StringTokenizer st = new StringTokenizer(noproxy, ",");
721 ret.excluded = new String[st.countTokens()];
722 for(int i=0; st.hasMoreTokens(); i++) ret.excluded[i] = st.nextToken();
725 if (ret.httpProxyHost == null && ret.socksProxyHost == null) return null;
731 public static JSScope proxyAutoConfigRootScope = new ProxyAutoConfigRootScope();
732 public static JS getProxyAutoConfigFunction(String url) {
734 BufferedReader br = new BufferedReader(new InputStreamReader(new HTTP(url, true).GET()));
737 while((s = br.readLine()) != null) script += s + "\n";
738 if (Log.on) Log.info(Proxy.class, "successfully retrieved WPAD PAC:");
739 if (Log.on) Log.info(Proxy.class, script);
742 Vector carpHosts = new Vector();
743 for(int i=0; i<script.length(); i++)
744 if (script.regionMatches(i, "new Node(", 0, 9)) {
745 String host = script.substring(i + 10, script.indexOf('\"', i + 11));
746 if (Log.on) Log.info(Proxy.class, "Detected MS Proxy Server CARP Script, Host=" + host);
747 carpHosts.addElement(host);
749 if (carpHosts.size() > 0) {
750 script = "function FindProxyForURL(url, host) {\nreturn \"";
751 for(int i=0; i<carpHosts.size(); i++)
752 script += "PROXY " + carpHosts.elementAt(i) + "; ";
754 if (Log.on) Log.info(Proxy.class, "DeCARPed PAC script:");
755 if (Log.on) Log.info(Proxy.class, script);
758 JS scr = JS.fromReader("PAC script at " + url, 0, new StringReader(script));
759 JS.cloneWithNewParentScope(scr, proxyAutoConfigRootScope).call(null, null, null, null, 0);
760 return (JS)proxyAutoConfigRootScope.get("FindProxyForURL");
761 } catch (Exception e) {
763 Log.info(Platform.class, "WPAD detection failed due to:");
764 if (e instanceof JSExn) {
766 org.ibex.js.JSArray arr = new org.ibex.js.JSArray();
767 arr.addElement(((JSExn)e).getObject());
768 } catch (Exception e2) {
769 Log.info(Platform.class, e);
772 else Log.info(Platform.class, e);
779 // Authorization ///////////////////////////////////////////////////////////////////////////////////
781 public static class Authorization {
783 static public String authorization = null;
784 static public String authorization2 = null;
785 static public Semaphore waitingForUser = new Semaphore();
787 // FIXME: temporarily disabled so we can use HTTP outside the core
789 public static synchronized void getPassword(final String realm, final String style,
790 final String proxyIP, String oldAuth) throws IOException {
792 // this handles cases where multiple threads hit the proxy auth at the same time -- all but one will block on the
793 // synchronized keyword. If 'authorization' changed while the thread was blocked, it means that the user entered
794 // a password, so we should reattempt authorization.
796 if (authorization != oldAuth) return;
797 if (Log.on) Log.info(Authorization.class, "displaying proxy authorization dialog");
798 Scheduler.add(new Task() {
799 public void perform() throws IOException, JSExn {
803 //Template.buildTemplate("org/ibex/builtin/proxy_authorization.ibex", Stream.getInputStream((JS)Main.builtin.get("org/ibex/builtin/proxy_authorization.ibex")), new Ibex(null));
805 b.put("realm", realm);
806 b.put("proxyIP", proxyIP);
810 waitingForUser.block();
811 if (Log.on) Log.info(Authorization.class, "got proxy authorization info; re-attempting connection");
817 // ProxyAutoConfigRootJSScope ////////////////////////////////////////////////////////////////////
819 public static class ProxyAutoConfigRootScope extends JSScope.Global {
821 public ProxyAutoConfigRootScope() { super(); }
823 public Object get(Object name) throws JSExn {
825 case "isPlainHostName": return METHOD;
826 case "dnsDomainIs": return METHOD;
827 case "localHostOrDomainIs": return METHOD;
828 case "isResolvable": return METHOD;
829 case "isInNet": return METHOD;
830 case "dnsResolve": return METHOD;
831 case "myIpAddress": return METHOD;
832 case "dnsDomainLevels": return METHOD;
833 case "shExpMatch": return METHOD;
834 case "weekdayRange": return METHOD;
835 case "dateRange": return METHOD;
836 case "timeRange": return METHOD;
837 case "ProxyConfig": return ProxyConfig;
839 return super.get(name);
842 private static final JS proxyConfigBindings = new JS();
843 private static final JS ProxyConfig = new JS() {
844 public Object get(Object name) {
845 if (name.equals("bindings")) return proxyConfigBindings;
850 public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
852 case "isPlainHostName": return (a0.toString().indexOf('.') == -1) ? Boolean.TRUE : Boolean.FALSE;
853 case "dnsDomainIs": return (a0.toString().endsWith(a1.toString())) ? Boolean.TRUE : Boolean.FALSE;
854 case "localHostOrDomainIs":
855 return (a0.equals(a1) || (a0.toString().indexOf('.') == -1 && a1.toString().startsWith(a0.toString()))) ? T:F;
856 case "isResolvable": try {
857 return (InetAddress.getByName(a0.toString()) != null) ? Boolean.TRUE : Boolean.FALSE;
858 } catch (UnknownHostException e) { return F; }
860 if (nargs != 3) return Boolean.FALSE;
862 byte[] host = InetAddress.getByName(a0.toString()).getAddress();
863 byte[] net = InetAddress.getByName(a1.toString()).getAddress();
864 byte[] mask = InetAddress.getByName(a2.toString()).getAddress();
865 return ((host[0] & mask[0]) == net[0] &&
866 (host[1] & mask[1]) == net[1] &&
867 (host[2] & mask[2]) == net[2] &&
868 (host[3] & mask[3]) == net[3]) ?
869 Boolean.TRUE : Boolean.FALSE;
870 } catch (Exception e) {
871 throw new JSExn("exception in isInNet(): " + e);
875 return InetAddress.getByName(a0.toString()).getHostAddress();
876 } catch (UnknownHostException e) {
881 return InetAddress.getLocalHost().getHostAddress();
882 } catch (UnknownHostException e) {
883 if (Log.on) Log.info(this, "strange... host does not know its own address");
886 case "dnsDomainLevels":
887 String s = a0.toString();
889 while((i = s.indexOf('.', i)) != -1) i++;
890 return new Integer(i);
892 StringTokenizer st = new StringTokenizer(a1.toString(), "*", false);
893 String[] arr = new String[st.countTokens()];
894 String s = a0.toString();
895 for (int i=0; st.hasMoreTokens(); i++) arr[i] = st.nextToken();
896 return match(arr, s, 0) ? Boolean.TRUE : Boolean.FALSE;
898 TimeZone tz = (nargs < 3 || a2 == null || !a2.equals("GMT")) ?
899 TimeZone.getTimeZone("UTC") : TimeZone.getDefault();
900 Calendar c = new GregorianCalendar();
902 c.setTime(new java.util.Date());
903 java.util.Date d = c.getTime();
904 int day = d.getDay();
905 String d1s = a0.toString().toUpperCase();
907 for(int i=0; i<days.length; i++) if (days[i].equals(d1s)) d1 = i;
910 return d1 == day ? Boolean.TRUE : Boolean.FALSE;
912 String d2s = a1.toString().toUpperCase();
913 for(int i=0; i<days.length; i++) if (days[i].equals(d2s)) d2 = i;
915 return ((d1 <= d2 && day >= d1 && day <= d2) || (d1 > d2 && (day >= d1 || day <= d2))) ? T : F;
917 case "dateRange": throw new JSExn("Ibex does not support dateRange() in PAC scripts");
918 case "timeRange": throw new JSExn("Ibex does not support timeRange() in PAC scripts");
920 return super.callMethod(method, a0, a1, a2, rest, nargs);
922 private static boolean match(String[] arr, String s, int index) {
923 if (index >= arr.length) return true;
924 for(int i=0; i<s.length(); i++) {
925 String s2 = s.substring(i);
926 if (s2.startsWith(arr[index]) && match(arr, s2.substring(arr[index].length()), index + 1)) return true;
930 public static String[] days = { "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };
935 * An implementation of Microsoft's proprietary NTLM authentication protocol. This code was derived from Eric
936 * Glass's work, and is copyright as follows:
938 * Copyright (c) 2003 Eric Glass (eglass1 at comcast.net).
940 * Permission to use, copy, modify, and distribute this document for any purpose and without any fee is hereby
941 * granted, provided that the above copyright notice and this list of conditions appear in all copies.
942 * The most current version of this document may be obtained from http://davenport.sourceforge.net/ntlm.html .
944 public static class NTLM {
946 public static final byte[] type1 = new byte[] { 0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01,
947 0x00, 0x00, 0x00, 0x00, 0x02, 0x02, 0x00 };
950 * Calculates the NTLM Response for the given challenge, using the
951 * specified password.
953 * @param password The user's password.
954 * @param challenge The Type 2 challenge from the server.
956 * @return The NTLM Response.
958 public static byte[] getNTLMResponse(String password, byte[] challenge)
959 throws UnsupportedEncodingException {
960 byte[] ntlmHash = ntlmHash(password);
961 return lmResponse(ntlmHash, challenge);
965 * Calculates the LM Response for the given challenge, using the specified
968 * @param password The user's password.
969 * @param challenge The Type 2 challenge from the server.
971 * @return The LM Response.
973 public static byte[] getLMResponse(String password, byte[] challenge)
975 byte[] lmHash = lmHash(password);
976 return lmResponse(lmHash, challenge);
980 * Calculates the NTLMv2 Response for the given challenge, using the
981 * specified authentication target, username, password, target information
982 * block, and client challenge.
984 * @param target The authentication target (i.e., domain).
985 * @param user The username.
986 * @param password The user's password.
987 * @param targetInformation The target information block from the Type 2
989 * @param challenge The Type 2 challenge from the server.
990 * @param clientChallenge The random 8-byte client challenge.
992 * @return The NTLMv2 Response.
994 public static byte[] getNTLMv2Response(String target, String user,
995 String password, byte[] targetInformation, byte[] challenge,
996 byte[] clientChallenge) throws UnsupportedEncodingException {
997 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
998 byte[] blob = createBlob(targetInformation, clientChallenge);
999 return lmv2Response(ntlmv2Hash, blob, challenge);
1003 * Calculates the LMv2 Response for the given challenge, using the
1004 * specified authentication target, username, password, and client
1007 * @param target The authentication target (i.e., domain).
1008 * @param user The username.
1009 * @param password The user's password.
1010 * @param challenge The Type 2 challenge from the server.
1011 * @param clientChallenge The random 8-byte client challenge.
1013 * @return The LMv2 Response.
1015 public static byte[] getLMv2Response(String target, String user,
1016 String password, byte[] challenge, byte[] clientChallenge)
1017 throws UnsupportedEncodingException {
1018 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
1019 return lmv2Response(ntlmv2Hash, clientChallenge, challenge);
1023 * Calculates the NTLM2 Session Response for the given challenge, using the
1024 * specified password and client challenge.
1026 * @param password The user's password.
1027 * @param challenge The Type 2 challenge from the server.
1028 * @param clientChallenge The random 8-byte client challenge.
1030 * @return The NTLM2 Session Response. This is placed in the NTLM
1031 * response field of the Type 3 message; the LM response field contains
1032 * the client challenge, null-padded to 24 bytes.
1034 public static byte[] getNTLM2SessionResponse(String password,
1035 byte[] challenge, byte[] clientChallenge) throws UnsupportedEncodingException {
1036 byte[] ntlmHash = ntlmHash(password);
1037 MD5 md5 = new MD5();
1038 md5.update(challenge, 0, challenge.length);
1039 md5.update(clientChallenge, 0, clientChallenge.length);
1040 byte[] sessionHash = new byte[8];
1041 byte[] md5_out = new byte[md5.getDigestSize()];
1042 md5.doFinal(md5_out, 0);
1043 System.arraycopy(md5_out, 0, sessionHash, 0, 8);
1044 return lmResponse(ntlmHash, sessionHash);
1048 * Creates the LM Hash of the user's password.
1050 * @param password The password.
1052 * @return The LM Hash of the given password, used in the calculation
1053 * of the LM Response.
1055 private static byte[] lmHash(String password) {
1057 byte[] oemPassword = password.toUpperCase().getBytes("UTF8");
1058 int length = java.lang.Math.min(oemPassword.length, 14);
1059 byte[] keyBytes = new byte[14];
1060 System.arraycopy(oemPassword, 0, keyBytes, 0, length);
1061 Key lowKey = createDESKey(keyBytes, 0);
1062 Key highKey = createDESKey(keyBytes, 7);
1063 byte[] magicConstant = "KGS!@#$%".getBytes("UTF8");
1064 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1065 des.init(Cipher.ENCRYPT_MODE, lowKey);
1066 byte[] lowHash = des.doFinal(magicConstant);
1067 des.init(Cipher.ENCRYPT_MODE, highKey);
1068 byte[] highHash = des.doFinal(magicConstant);
1069 byte[] lmHash = new byte[16];
1070 System.arraycopy(lowHash, 0, lmHash, 0, 8);
1071 System.arraycopy(highHash, 0, lmHash, 8, 8);
1078 * Creates the NTLM Hash of the user's password.
1080 * @param password The password.
1082 * @return The NTLM Hash of the given password, used in the calculation
1083 * of the NTLM Response and the NTLMv2 and LMv2 Hashes.
1085 private static byte[] ntlmHash(String password) throws UnsupportedEncodingException {
1088 byte[] unicodePassword = password.getBytes("UnicodeLittleUnmarked");
1089 MD4 md4 = new MD4();
1090 md4.update(unicodePassword, 0, unicodePassword.length);
1091 byte[] ret = new byte[md4.getDigestSize()];
1098 * Creates the NTLMv2 Hash of the user's password.
1100 * @param target The authentication target (i.e., domain).
1101 * @param user The username.
1102 * @param password The password.
1104 * @return The NTLMv2 Hash, used in the calculation of the NTLMv2
1105 * and LMv2 Responses.
1107 private static byte[] ntlmv2Hash(String target, String user,
1108 String password) throws UnsupportedEncodingException {
1109 byte[] ntlmHash = ntlmHash(password);
1110 String identity = user.toUpperCase() + target.toUpperCase();
1111 return hmacMD5(identity.getBytes("UnicodeLittleUnmarked"), ntlmHash);
1115 * Creates the LM Response from the given hash and Type 2 challenge.
1117 * @param hash The LM or NTLM Hash.
1118 * @param challenge The server challenge from the Type 2 message.
1120 * @return The response (either LM or NTLM, depending on the provided
1123 private static byte[] lmResponse(byte[] hash, byte[] challenge)
1126 byte[] keyBytes = new byte[21];
1127 System.arraycopy(hash, 0, keyBytes, 0, 16);
1128 Key lowKey = createDESKey(keyBytes, 0);
1129 Key middleKey = createDESKey(keyBytes, 7);
1130 Key highKey = createDESKey(keyBytes, 14);
1131 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1132 des.init(Cipher.ENCRYPT_MODE, lowKey);
1133 byte[] lowResponse = des.doFinal(challenge);
1134 des.init(Cipher.ENCRYPT_MODE, middleKey);
1135 byte[] middleResponse = des.doFinal(challenge);
1136 des.init(Cipher.ENCRYPT_MODE, highKey);
1137 byte[] highResponse = des.doFinal(challenge);
1138 byte[] lmResponse = new byte[24];
1139 System.arraycopy(lowResponse, 0, lmResponse, 0, 8);
1140 System.arraycopy(middleResponse, 0, lmResponse, 8, 8);
1141 System.arraycopy(highResponse, 0, lmResponse, 16, 8);
1148 * Creates the LMv2 Response from the given hash, client data, and
1151 * @param hash The NTLMv2 Hash.
1152 * @param clientData The client data (blob or client challenge).
1153 * @param challenge The server challenge from the Type 2 message.
1155 * @return The response (either NTLMv2 or LMv2, depending on the
1158 private static byte[] lmv2Response(byte[] hash, byte[] clientData,
1160 byte[] data = new byte[challenge.length + clientData.length];
1161 System.arraycopy(challenge, 0, data, 0, challenge.length);
1162 System.arraycopy(clientData, 0, data, challenge.length,
1164 byte[] mac = hmacMD5(data, hash);
1165 byte[] lmv2Response = new byte[mac.length + clientData.length];
1166 System.arraycopy(mac, 0, lmv2Response, 0, mac.length);
1167 System.arraycopy(clientData, 0, lmv2Response, mac.length,
1169 return lmv2Response;
1173 * Creates the NTLMv2 blob from the given target information block and
1176 * @param targetInformation The target information block from the Type 2
1178 * @param clientChallenge The random 8-byte client challenge.
1180 * @return The blob, used in the calculation of the NTLMv2 Response.
1182 private static byte[] createBlob(byte[] targetInformation,
1183 byte[] clientChallenge) {
1184 byte[] blobSignature = new byte[] {
1185 (byte) 0x01, (byte) 0x01, (byte) 0x00, (byte) 0x00
1187 byte[] reserved = new byte[] {
1188 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1190 byte[] unknown1 = new byte[] {
1191 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1193 byte[] unknown2 = new byte[] {
1194 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1196 long time = System.currentTimeMillis();
1197 time += 11644473600000l; // milliseconds from January 1, 1601 -> epoch.
1198 time *= 10000; // tenths of a microsecond.
1199 // convert to little-endian byte array.
1200 byte[] timestamp = new byte[8];
1201 for (int i = 0; i < 8; i++) {
1202 timestamp[i] = (byte) time;
1205 byte[] blob = new byte[blobSignature.length + reserved.length +
1206 timestamp.length + clientChallenge.length +
1207 unknown1.length + targetInformation.length +
1210 System.arraycopy(blobSignature, 0, blob, offset, blobSignature.length);
1211 offset += blobSignature.length;
1212 System.arraycopy(reserved, 0, blob, offset, reserved.length);
1213 offset += reserved.length;
1214 System.arraycopy(timestamp, 0, blob, offset, timestamp.length);
1215 offset += timestamp.length;
1216 System.arraycopy(clientChallenge, 0, blob, offset,
1217 clientChallenge.length);
1218 offset += clientChallenge.length;
1219 System.arraycopy(unknown1, 0, blob, offset, unknown1.length);
1220 offset += unknown1.length;
1221 System.arraycopy(targetInformation, 0, blob, offset,
1222 targetInformation.length);
1223 offset += targetInformation.length;
1224 System.arraycopy(unknown2, 0, blob, offset, unknown2.length);
1229 * Calculates the HMAC-MD5 hash of the given data using the specified
1232 * @param data The data for which the hash will be calculated.
1233 * @param key The hashing key.
1235 * @return The HMAC-MD5 hash of the given data.
1237 private static byte[] hmacMD5(byte[] data, byte[] key) {
1238 byte[] ipad = new byte[64];
1239 byte[] opad = new byte[64];
1240 for (int i = 0; i < 64; i++) {
1241 ipad[i] = (byte) 0x36;
1242 opad[i] = (byte) 0x5c;
1244 for (int i = key.length - 1; i >= 0; i--) {
1248 byte[] content = new byte[data.length + 64];
1249 System.arraycopy(ipad, 0, content, 0, 64);
1250 System.arraycopy(data, 0, content, 64, data.length);
1251 MD5 md5 = new MD5();
1252 md5.update(content, 0, content.length);
1253 data = new byte[md5.getDigestSize()];
1254 md5.doFinal(data, 0);
1255 content = new byte[data.length + 64];
1256 System.arraycopy(opad, 0, content, 0, 64);
1257 System.arraycopy(data, 0, content, 64, data.length);
1259 md5.update(content, 0, content.length);
1260 byte[] ret = new byte[md5.getDigestSize()];
1261 md5.doFinal(ret, 0);
1266 * Creates a DES encryption key from the given key material.
1268 * @param bytes A byte array containing the DES key material.
1269 * @param offset The offset in the given byte array at which
1270 * the 7-byte key material starts.
1272 * @return A DES encryption key created from the key material
1273 * starting at the specified offset in the given byte array.
1276 private static Key createDESKey(byte[] bytes, int offset) {
1277 byte[] keyBytes = new byte[7];
1278 System.arraycopy(bytes, offset, keyBytes, 0, 7);
1279 byte[] material = new byte[8];
1280 material[0] = keyBytes[0];
1281 material[1] = (byte) (keyBytes[0] << 7 | (keyBytes[1] & 0xff) >>> 1);
1282 material[2] = (byte) (keyBytes[1] << 6 | (keyBytes[2] & 0xff) >>> 2);
1283 material[3] = (byte) (keyBytes[2] << 5 | (keyBytes[3] & 0xff) >>> 3);
1284 material[4] = (byte) (keyBytes[3] << 4 | (keyBytes[4] & 0xff) >>> 4);
1285 material[5] = (byte) (keyBytes[4] << 3 | (keyBytes[5] & 0xff) >>> 5);
1286 material[6] = (byte) (keyBytes[5] << 2 | (keyBytes[6] & 0xff) >>> 6);
1287 material[7] = (byte) (keyBytes[6] << 1);
1288 oddParity(material);
1289 return new SecretKeySpec(material, "DES");
1294 * Applies odd parity to the given byte array.
1296 * @param bytes The data whose parity bits are to be adjusted for
1299 private static void oddParity(byte[] bytes) {
1300 for (int i = 0; i < bytes.length; i++) {
1302 boolean needsParity = (((b >>> 7) ^ (b >>> 6) ^ (b >>> 5) ^
1303 (b >>> 4) ^ (b >>> 3) ^ (b >>> 2) ^
1304 (b >>> 1)) & 0x01) == 0;
1306 bytes[i] |= (byte) 0x01;
1308 bytes[i] &= (byte) 0xfe;