1 // Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
8 import org.ibex.util.*;
9 import org.ibex.plat.*;
10 import org.ibex.core.*;
11 import org.ibex.crypto.*;
14 * This object encapsulates a *single* HTTP connection. Multiple requests may be pipelined over a connection (thread-safe),
15 * although any IOException encountered in a request will invalidate all later requests.
20 // Public Methods ////////////////////////////////////////////////////////////////////////////////////////
22 public HTTP(String url) { this(url, false); }
23 public HTTP(String url, boolean skipResolveCheck) { originalUrl = url; this.skipResolveCheck = skipResolveCheck; }
25 /** Performs an HTTP GET request */
26 public InputStream GET() throws IOException { return makeRequest(null, null); }
28 /** Performs an HTTP POST request; content is additional headers, blank line, and body */
29 public InputStream POST(String contentType, String content) throws IOException { return makeRequest(contentType, content); }
31 public static class HTTPException extends IOException { public HTTPException(String s) { super(s); } }
33 public static HTTP stdio = new HTTP("stdio:");
36 // Statics ///////////////////////////////////////////////////////////////////////////////////////////////
38 static Hash resolvedHosts = new Hash(); ///< cache for resolveAndCheckIfFirewalled()
39 private static Hash authCache = new Hash(); ///< cache of userInfo strings, keyed on originalUrl
42 // Instance Data ///////////////////////////////////////////////////////////////////////////////////////////////
44 final String originalUrl; ///< the URL as passed to the original constructor; this is never changed
45 String url = null; ///< the URL to connect to; this is munged when the url is parsed */
46 String host = null; ///< the host to connect to
47 int port = -1; ///< the port to connect on
48 boolean ssl = false; ///< true if SSL (HTTPS) should be used
49 String path = null; ///< the path (URI) to retrieve on the server
50 Socket sock = null; ///< the socket
51 InputStream in = null; ///< the socket's inputstream
52 String userInfo = null; ///< the username and password portions of the URL
53 boolean firstRequest = true; ///< true iff this is the first request to be made on this socket
54 boolean skipResolveCheck = false; ///< allowed to skip the resolve check when downloading PAC script
55 boolean proxied = false; ///< true iff we're using a proxy
57 /** this is null if the current request is the first request on
58 * this HTTP connection; otherwise it is a Semaphore which will be
59 * released once the request ahead of us has recieved its response
61 Semaphore okToRecieve = null;
64 * This method isn't synchronized; however, only one thread can be in the inner synchronized block at a time, and the rest of
65 * the method is protected by in-order one-at-a-time semaphore lock-steps
67 private InputStream makeRequest(String contentType, String content) throws IOException {
69 // Step 1: send the request and establish a semaphore to stop any requests that pipeline after us
70 Semaphore blockOn = null;
71 Semaphore releaseMe = null;
75 sendRequest(contentType, content);
76 } catch (IOException e) {
80 blockOn = okToRecieve;
81 releaseMe = okToRecieve = new Semaphore();
84 // Step 2: wait for requests ahead of us to complete, then read the reply off the stream
85 boolean doRelease = true;
87 if (blockOn != null) blockOn.block();
89 // previous call wrecked the socket connection, but we already sent our request, so we can't just retry --
90 // this could cause the server to receive the request twice, which could be bad (think of the case where the
91 // server call causes Amazon.com to ship you an item with one-click purchasing).
93 throw new HTTPException("a previous pipelined call messed up the socket");
95 Hashtable h = in == null ? null : parseHeaders(in);
97 if (firstRequest) throw new HTTPException("server closed the socket with no response");
98 // sometimes the server chooses to close the stream between requests
101 return makeRequest(contentType, content);
104 String reply = h.get("STATUSLINE").toString();
106 if (reply.startsWith("407") || reply.startsWith("401")) {
108 if (reply.startsWith("407")) doProxyAuth(h, content == null ? "GET" : "POST");
109 else doWebAuth(h, content == null ? "GET" : "POST");
111 if (h.get("HTTP").equals("1.0") && h.get("content-length") == null) {
112 if (Log.on) Log.info(this, "proxy returned an HTTP/1.0 reply with no content-length...");
115 int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
116 new HTTPInputStream(in, cl, releaseMe).close();
119 return makeRequest(contentType, content);
121 } else if (reply.startsWith("2")) {
122 if (h.get("HTTP").equals("1.0") && h.get("content-length") == null)
123 throw new HTTPException("Ibex does not support HTTP/1.0 servers which fail to return the Content-Length header");
124 int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
125 InputStream ret = new HTTPInputStream(in, cl, releaseMe);
126 if ("gzip".equals(h.get("content-encoding"))) ret = new java.util.zip.GZIPInputStream(ret);
131 throw new HTTPException("HTTP Error: " + reply);
135 } catch (IOException e) { reset(); throw e;
136 } finally { if (doRelease) releaseMe.release();
141 // Safeguarded DNS Resolver ///////////////////////////////////////////////////////////////////////////
144 * resolves the hostname and returns it as a string in the form "x.y.z.w"
145 * @throws HTTPException if the host falls within a firewalled netblock
147 private void resolveAndCheckIfFirewalled(String host) throws HTTPException {
150 if (resolvedHosts.get(host) != null) return;
152 // if all scripts are trustworthy (local FS), continue
153 if (Main.originAddr == null) return;
157 InetAddress addr = InetAddress.getByName(host);
158 byte[] quadbyte = addr.getAddress();
159 if ((quadbyte[0] == 10 ||
160 (quadbyte[0] == 192 && quadbyte[1] == 168) ||
161 (quadbyte[0] == 172 && (quadbyte[1] & 0xF0) == 16)) && !addr.equals(Main.originAddr))
162 throw new HTTPException("security violation: " + host + " [" + addr.getHostAddress() +
163 "] is in a firewalled netblock");
165 } catch (UnknownHostException uhe) { }
167 if (Platform.detectProxy() == null)
168 throw new HTTPException("could not resolve hostname \"" + host + "\" and no proxy configured");
172 // Methods to attempt socket creation /////////////////////////////////////////////////////////////////
174 private Socket getSocket(String host, int port, boolean ssl, boolean negotiate) throws IOException {
175 Socket ret = ssl ? new SSL(host, port, negotiate) : new Socket(java.net.InetAddress.getByName(host), port);
176 ret.setTcpNoDelay(true);
180 /** Attempts a direct connection */
181 private Socket attemptDirect() {
183 Log.info(this, "attempting to create unproxied socket to " +
184 host + ":" + port + (ssl ? " [ssl]" : ""));
185 return getSocket(host, port, ssl, true);
186 } catch (IOException e) {
187 if (Log.on) Log.info(this, "exception in attemptDirect(): " + e);
192 /** Attempts to use an HTTP proxy, employing the CONNECT method if HTTPS is requested */
193 private Socket attemptHttpProxy(String proxyHost, int proxyPort) {
195 if (Log.verbose) Log.info(this, "attempting to create HTTP proxied socket using proxy " + proxyHost + ":" + proxyPort);
196 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
199 if (!path.startsWith("http://")) path = "http://" + host + ":" + port + path;
203 PrintWriter pw = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
204 BufferedReader br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
205 pw.print("CONNECT " + host + ":" + port + " HTTP/1.1\r\n\r\n");
207 String s = br.readLine();
208 if (s.charAt(9) != '2') throw new HTTPException("proxy refused CONNECT method: \"" + s + "\"");
209 while (br.readLine().length() > 0) { };
210 ((SSL)sock).negotiate();
213 } catch (IOException e) {
214 if (Log.on) Log.info(this, "exception in attemptHttpProxy(): " + e);
220 * Implements SOCKSv4 with v4a DNS extension
221 * @see http://www.socks.nec.com/protocol/socks4.protocol
222 * @see http://www.socks.nec.com/protocol/socks4a.protocol
224 private Socket attemptSocksProxy(String proxyHost, int proxyPort) {
226 // even if host is already a "x.y.z.w" string, we use this to parse it into bytes
227 InetAddress addr = null;
228 try { addr = InetAddress.getByName(host); } catch (Exception e) { }
230 if (Log.verbose) Log.info(this, "attempting to create SOCKSv4" + (addr == null ? "" : "a") +
231 " proxied socket using proxy " + proxyHost + ":" + proxyPort);
234 Socket sock = getSocket(proxyHost, proxyPort, ssl, false);
236 DataOutputStream dos = new DataOutputStream(sock.getOutputStream());
237 dos.writeByte(0x04); // SOCKSv4(a)
238 dos.writeByte(0x01); // CONNECT
239 dos.writeShort(port & 0xffff); // port
240 if (addr == null) dos.writeInt(0x00000001); // bogus IP
241 else dos.write(addr.getAddress()); // actual IP
242 dos.writeByte(0x00); // no userid
244 PrintWriter pw = new PrintWriter(new OutputStreamWriter(dos));
247 dos.writeByte(0x00); // hostname null terminator
251 DataInputStream dis = new DataInputStream(sock.getInputStream());
252 dis.readByte(); // reply version
253 byte success = dis.readByte(); // success/fail
254 dis.skip(6); // ip/port
256 if ((int)(success & 0xff) == 90) {
257 if (ssl) ((SSL)sock).negotiate();
260 if (Log.on) Log.info(this, "SOCKS server denied access, code " + (success & 0xff));
263 } catch (IOException e) {
264 if (Log.on) Log.info(this, "exception in attemptSocksProxy(): " + e);
269 /** executes the PAC script and dispatches a call to one of the other attempt methods based on the result */
270 private Socket attemptPAC(org.ibex.js.JS pacFunc) {
271 if (Log.verbose) Log.info(this, "evaluating PAC script");
274 JS obj = pacFunc.call(JS.S(url), JS.S(host), null, null, 2);
275 if (Log.verbose) Log.info(this, " PAC script returned \"" + JS.debugToString(obj) + "\"");
276 pac = JS.toString(obj);
277 } catch (Throwable e) {
278 if (Log.on) Log.info(this, "PAC script threw exception " + e);
282 StringTokenizer st = new StringTokenizer(pac, ";", false);
283 while (st.hasMoreTokens()) {
284 String token = st.nextToken().trim();
285 if (Log.verbose) Log.info(this, " trying \"" + token + "\"...");
288 if (token.startsWith("DIRECT"))
289 ret = attemptDirect();
290 else if (token.startsWith("PROXY"))
291 ret = attemptHttpProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
292 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
293 else if (token.startsWith("SOCKS"))
294 ret = attemptSocksProxy(token.substring(token.indexOf(' ') + 1, token.indexOf(':')),
295 Integer.parseInt(token.substring(token.indexOf(':') + 1)));
296 if (ret != null) return ret;
297 } catch (Throwable e) {
298 if (Log.on) Log.info(this, "attempt at \"" + token + "\" failed due to " + e + "; trying next token");
301 if (Log.on) Log.info(this, "all PAC results exhausted");
306 // Everything Else ////////////////////////////////////////////////////////////////////////////
308 private synchronized void connect() throws IOException {
309 if (originalUrl.equals("stdio:")) { in = new BufferedInputStream(System.in); return; }
311 if (in == null) in = new BufferedInputStream(sock.getInputStream());
314 // grab the userinfo; gcj doesn't have java.net.URL.getUserInfo()
315 String url = originalUrl;
316 userInfo = url.substring(url.indexOf("://") + 3);
317 userInfo = userInfo.indexOf('/') == -1 ? userInfo : userInfo.substring(0, userInfo.indexOf('/'));
318 if (userInfo.indexOf('@') != -1) {
319 userInfo = userInfo.substring(0, userInfo.indexOf('@'));
320 url = url.substring(0, url.indexOf("://") + 3) + url.substring(url.indexOf('@') + 1);
325 if (url.startsWith("https:")) {
327 } else if (!url.startsWith("http:")) {
328 throw new IOException("HTTP only supports http/https urls");
330 if (url.indexOf("://") == -1) throw new IOException("URLs must contain a ://");
331 String temphost = url.substring(url.indexOf("://") + 3);
332 path = temphost.substring(temphost.indexOf('/'));
333 temphost = temphost.substring(0, temphost.indexOf('/'));
334 if (temphost.indexOf(':') != -1) {
335 port = Integer.parseInt(temphost.substring(temphost.indexOf(':')+1));
336 temphost = temphost.substring(0, temphost.indexOf(':'));
338 port = ssl ? 443 : 80;
340 if (!skipResolveCheck) resolveAndCheckIfFirewalled(temphost);
342 if (Log.verbose) Log.info(this, "creating HTTP object for connection to " + host + ":" + port);
344 Proxy pi = Platform.detectProxy();
347 for(int i=0; i<pi.excluded.length; i++) if (host.equals(pi.excluded[i])) break OUTER;
348 if (sock == null && pi.proxyAutoConfigFunction != null) sock = attemptPAC(pi.proxyAutoConfigFunction);
349 if (sock == null && ssl && pi.httpsProxyHost != null) sock = attemptHttpProxy(pi.httpsProxyHost,pi.httpsProxyPort);
350 if (sock == null && pi.httpProxyHost != null) sock = attemptHttpProxy(pi.httpProxyHost, pi.httpProxyPort);
351 if (sock == null && pi.socksProxyHost != null) sock = attemptSocksProxy(pi.socksProxyHost, pi.socksProxyPort);
354 proxied = sock != null;
355 if (sock == null) sock = attemptDirect();
356 if (sock == null) throw new HTTPException("unable to contact host " + host);
357 if (in == null) in = new BufferedInputStream(sock.getInputStream());
360 private void sendRequest(String contentType, String content) throws IOException {
361 PrintWriter pw = new PrintWriter(new OutputStreamWriter(originalUrl.equals("stdio:") ?
362 System.out : sock.getOutputStream()));
363 if (content != null) {
364 pw.print("POST " + path + " HTTP/1.0\r\n"); // FIXME chunked encoding
365 int contentLength = content.substring(0, 2).equals("\r\n") ?
366 content.length() - 2 :
367 (content.length() - content.indexOf("\r\n\r\n") - 4);
368 pw.print("Content-Length: " + contentLength + "\r\n");
369 if (contentType != null) pw.print("Content-Type: " + contentType + "\r\n");
371 pw.print("GET " + path + " HTTP/1.1\r\n");
374 pw.print("User-Agent: Ibex\r\n");
375 pw.print("Accept-encoding: gzip\r\n");
376 pw.print("Host: " + (host + (port == 80 ? "" : (":" + port))) + "\r\n");
377 if (proxied) pw.print("X-RequestOrigin: " + Main.originHost + "\r\n");
379 if (Proxy.Authorization.authorization != null) pw.print("Proxy-Authorization: "+Proxy.Authorization.authorization2+"\r\n");
380 if (authCache.get(originalUrl) != null) pw.print("Authorization: " + authCache.get(originalUrl) + "\r\n");
382 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");
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();*/ null; // FIXME: New api
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(JS.S("FindProxyForURL"));
751 } catch (Exception e) {
753 Log.info(Platform.class, "WPAD detection failed due to:");
754 // I have no idea what this was supposed to do
755 /*if (e instanceof JSExn) {
757 org.ibex.js.JSArray arr = new org.ibex.js.JSArray();
758 arr.addElement(((JSExn)e).getObject());
759 } catch (Exception e2) {
760 Log.info(Platform.class, e);
763 Log.info(Platform.class, e);
770 // Authorization ///////////////////////////////////////////////////////////////////////////////////
772 public static class Authorization {
774 static public String authorization = null;
775 static public String authorization2 = null;
776 static public Semaphore waitingForUser = new Semaphore();
778 public static synchronized void getPassword(final String realm, final String style,
779 final String proxyIP, String oldAuth) throws IOException {
781 // this handles cases where multiple threads hit the proxy auth at the same time -- all but one will block on the
782 // synchronized keyword. If 'authorization' changed while the thread was blocked, it means that the user entered
783 // a password, so we should reattempt authorization.
785 if (authorization != oldAuth) return;
786 if (Log.on) Log.info(Authorization.class, "displaying proxy authorization dialog");
787 Scheduler.add(new Task() {
788 public void perform() throws IOException, JSExn {
792 //Template.buildTemplate("org/ibex/builtin/proxy_authorization.ibex", Stream.getInputStream((JS)Main.builtin.get("org/ibex/builtin/proxy_authorization.ibex")), new Ibex(null));
794 b.put(JS.S("realm"), JS.S(realm));
795 b.put(JS.S("proxyIP"), JS.S(proxyIP));
799 waitingForUser.block();
800 if (Log.on) Log.info(Authorization.class, "got proxy authorization info; re-attempting connection");
805 // ProxyAutoConfigRootJSScope ////////////////////////////////////////////////////////////////////
807 // FIXME: JS Update for new API
808 /*public static class ProxyAutoConfigRootScope extends JSScope.Global {
810 public ProxyAutoConfigRootScope() { super(); }
812 public Object get(Object name) throws JSExn {
814 case "isPlainHostName": return METHOD;
815 case "dnsDomainIs": return METHOD;
816 case "localHostOrDomainIs": return METHOD;
817 case "isResolvable": return METHOD;
818 case "isInNet": return METHOD;
819 case "dnsResolve": return METHOD;
820 case "myIpAddress": return METHOD;
821 case "dnsDomainLevels": return METHOD;
822 case "shExpMatch": return METHOD;
823 case "weekdayRange": return METHOD;
824 case "dateRange": return METHOD;
825 case "timeRange": return METHOD;
826 case "ProxyConfig": return ProxyConfig;
828 return super.get(name);
831 private static final JS proxyConfigBindings = new JS.O();
832 private static final JS ProxyConfig = new JS() {
833 public Object get(Object name) {
834 if (name.equals("bindings")) return proxyConfigBindings;
839 public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
841 case "isPlainHostName": return (a0.toString().indexOf('.') == -1) ? Boolean.TRUE : Boolean.FALSE;
842 case "dnsDomainIs": return (a0.toString().endsWith(a1.toString())) ? Boolean.TRUE : Boolean.FALSE;
843 case "localHostOrDomainIs":
844 return (a0.equals(a1) || (a0.toString().indexOf('.') == -1 && a1.toString().startsWith(a0.toString()))) ? T:F;
845 case "isResolvable": try {
846 return (InetAddress.getByName(a0.toString()) != null) ? Boolean.TRUE : Boolean.FALSE;
847 } catch (UnknownHostException e) { return F; }
849 if (nargs != 3) return Boolean.FALSE;
851 byte[] host = InetAddress.getByName(a0.toString()).getAddress();
852 byte[] net = InetAddress.getByName(a1.toString()).getAddress();
853 byte[] mask = InetAddress.getByName(a2.toString()).getAddress();
854 return ((host[0] & mask[0]) == net[0] &&
855 (host[1] & mask[1]) == net[1] &&
856 (host[2] & mask[2]) == net[2] &&
857 (host[3] & mask[3]) == net[3]) ?
858 Boolean.TRUE : Boolean.FALSE;
859 } catch (Exception e) {
860 throw new JSExn("exception in isInNet(): " + e);
864 return InetAddress.getByName(a0.toString()).getHostAddress();
865 } catch (UnknownHostException e) {
870 return InetAddress.getLocalHost().getHostAddress();
871 } catch (UnknownHostException e) {
872 if (Log.on) Log.info(this, "strange... host does not know its own address");
875 case "dnsDomainLevels":
876 String s = a0.toString();
878 while((i = s.indexOf('.', i)) != -1) i++;
879 return new Integer(i);
881 StringTokenizer st = new StringTokenizer(a1.toString(), "*", false);
882 String[] arr = new String[st.countTokens()];
883 String s = a0.toString();
884 for (int i=0; st.hasMoreTokens(); i++) arr[i] = st.nextToken();
885 return match(arr, s, 0) ? Boolean.TRUE : Boolean.FALSE;
887 TimeZone tz = (nargs < 3 || a2 == null || !a2.equals("GMT")) ?
888 TimeZone.getTimeZone("UTC") : TimeZone.getDefault();
889 Calendar c = new GregorianCalendar();
891 c.setTime(new java.util.Date());
892 java.util.Date d = c.getTime();
893 int day = d.getDay();
894 String d1s = a0.toString().toUpperCase();
896 for(int i=0; i<days.length; i++) if (days[i].equals(d1s)) d1 = i;
899 return d1 == day ? Boolean.TRUE : Boolean.FALSE;
901 String d2s = a1.toString().toUpperCase();
902 for(int i=0; i<days.length; i++) if (days[i].equals(d2s)) d2 = i;
904 return ((d1 <= d2 && day >= d1 && day <= d2) || (d1 > d2 && (day >= d1 || day <= d2))) ? T : F;
906 case "dateRange": throw new JSExn("Ibex does not support dateRange() in PAC scripts");
907 case "timeRange": throw new JSExn("Ibex does not support timeRange() in PAC scripts");
909 return super.callMethod(method, a0, a1, a2, rest, nargs);
911 private static boolean match(String[] arr, String s, int index) {
912 if (index >= arr.length) return true;
913 for(int i=0; i<s.length(); i++) {
914 String s2 = s.substring(i);
915 if (s2.startsWith(arr[index]) && match(arr, s2.substring(arr[index].length()), index + 1)) return true;
919 public static String[] days = { "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" };
924 * An implementation of Microsoft's proprietary NTLM authentication protocol. This code was derived from Eric
925 * Glass's work, and is copyright as follows:
927 * Copyright (c) 2003 Eric Glass (eglass1 at comcast.net).
929 * Permission to use, copy, modify, and distribute this document for any purpose and without any fee is hereby
930 * granted, provided that the above copyright notice and this list of conditions appear in all copies.
931 * The most current version of this document may be obtained from http://davenport.sourceforge.net/ntlm.html .
933 public static class NTLM {
935 public static final byte[] type1 = new byte[] { 0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01,
936 0x00, 0x00, 0x00, 0x00, 0x02, 0x02, 0x00 };
939 * Calculates the NTLM Response for the given challenge, using the
940 * specified password.
942 * @param password The user's password.
943 * @param challenge The Type 2 challenge from the server.
945 * @return The NTLM Response.
947 public static byte[] getNTLMResponse(String password, byte[] challenge)
948 throws UnsupportedEncodingException {
949 byte[] ntlmHash = ntlmHash(password);
950 return lmResponse(ntlmHash, challenge);
954 * Calculates the LM Response for the given challenge, using the specified
957 * @param password The user's password.
958 * @param challenge The Type 2 challenge from the server.
960 * @return The LM Response.
962 public static byte[] getLMResponse(String password, byte[] challenge)
964 byte[] lmHash = lmHash(password);
965 return lmResponse(lmHash, challenge);
969 * Calculates the NTLMv2 Response for the given challenge, using the
970 * specified authentication target, username, password, target information
971 * block, and client challenge.
973 * @param target The authentication target (i.e., domain).
974 * @param user The username.
975 * @param password The user's password.
976 * @param targetInformation The target information block from the Type 2
978 * @param challenge The Type 2 challenge from the server.
979 * @param clientChallenge The random 8-byte client challenge.
981 * @return The NTLMv2 Response.
983 public static byte[] getNTLMv2Response(String target, String user,
984 String password, byte[] targetInformation, byte[] challenge,
985 byte[] clientChallenge) throws UnsupportedEncodingException {
986 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
987 byte[] blob = createBlob(targetInformation, clientChallenge);
988 return lmv2Response(ntlmv2Hash, blob, challenge);
992 * Calculates the LMv2 Response for the given challenge, using the
993 * specified authentication target, username, password, and client
996 * @param target The authentication target (i.e., domain).
997 * @param user The username.
998 * @param password The user's password.
999 * @param challenge The Type 2 challenge from the server.
1000 * @param clientChallenge The random 8-byte client challenge.
1002 * @return The LMv2 Response.
1004 public static byte[] getLMv2Response(String target, String user,
1005 String password, byte[] challenge, byte[] clientChallenge)
1006 throws UnsupportedEncodingException {
1007 byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
1008 return lmv2Response(ntlmv2Hash, clientChallenge, challenge);
1012 * Calculates the NTLM2 Session Response for the given challenge, using the
1013 * specified password and client challenge.
1015 * @param password The user's password.
1016 * @param challenge The Type 2 challenge from the server.
1017 * @param clientChallenge The random 8-byte client challenge.
1019 * @return The NTLM2 Session Response. This is placed in the NTLM
1020 * response field of the Type 3 message; the LM response field contains
1021 * the client challenge, null-padded to 24 bytes.
1023 public static byte[] getNTLM2SessionResponse(String password,
1024 byte[] challenge, byte[] clientChallenge) throws UnsupportedEncodingException {
1025 byte[] ntlmHash = ntlmHash(password);
1026 MD5 md5 = new MD5();
1027 md5.update(challenge, 0, challenge.length);
1028 md5.update(clientChallenge, 0, clientChallenge.length);
1029 byte[] sessionHash = new byte[8];
1030 byte[] md5_out = new byte[md5.getDigestSize()];
1031 md5.doFinal(md5_out, 0);
1032 System.arraycopy(md5_out, 0, sessionHash, 0, 8);
1033 return lmResponse(ntlmHash, sessionHash);
1037 * Creates the LM Hash of the user's password.
1039 * @param password The password.
1041 * @return The LM Hash of the given password, used in the calculation
1042 * of the LM Response.
1044 private static byte[] lmHash(String password) {
1046 byte[] oemPassword = password.toUpperCase().getBytes("UTF8");
1047 int length = java.lang.Math.min(oemPassword.length, 14);
1048 byte[] keyBytes = new byte[14];
1049 System.arraycopy(oemPassword, 0, keyBytes, 0, length);
1050 Key lowKey = createDESKey(keyBytes, 0);
1051 Key highKey = createDESKey(keyBytes, 7);
1052 byte[] magicConstant = "KGS!@#$%".getBytes("UTF8");
1053 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1054 des.init(Cipher.ENCRYPT_MODE, lowKey);
1055 byte[] lowHash = des.doFinal(magicConstant);
1056 des.init(Cipher.ENCRYPT_MODE, highKey);
1057 byte[] highHash = des.doFinal(magicConstant);
1058 byte[] lmHash = new byte[16];
1059 System.arraycopy(lowHash, 0, lmHash, 0, 8);
1060 System.arraycopy(highHash, 0, lmHash, 8, 8);
1067 * Creates the NTLM Hash of the user's password.
1069 * @param password The password.
1071 * @return The NTLM Hash of the given password, used in the calculation
1072 * of the NTLM Response and the NTLMv2 and LMv2 Hashes.
1074 private static byte[] ntlmHash(String password) throws UnsupportedEncodingException {
1077 byte[] unicodePassword = password.getBytes("UnicodeLittleUnmarked");
1078 MD4 md4 = new MD4();
1079 md4.update(unicodePassword, 0, unicodePassword.length);
1080 byte[] ret = new byte[md4.getDigestSize()];
1087 * Creates the NTLMv2 Hash of the user's password.
1089 * @param target The authentication target (i.e., domain).
1090 * @param user The username.
1091 * @param password The password.
1093 * @return The NTLMv2 Hash, used in the calculation of the NTLMv2
1094 * and LMv2 Responses.
1096 private static byte[] ntlmv2Hash(String target, String user,
1097 String password) throws UnsupportedEncodingException {
1098 byte[] ntlmHash = ntlmHash(password);
1099 String identity = user.toUpperCase() + target.toUpperCase();
1100 return hmacMD5(identity.getBytes("UnicodeLittleUnmarked"), ntlmHash);
1104 * Creates the LM Response from the given hash and Type 2 challenge.
1106 * @param hash The LM or NTLM Hash.
1107 * @param challenge The server challenge from the Type 2 message.
1109 * @return The response (either LM or NTLM, depending on the provided
1112 private static byte[] lmResponse(byte[] hash, byte[] challenge)
1115 byte[] keyBytes = new byte[21];
1116 System.arraycopy(hash, 0, keyBytes, 0, 16);
1117 Key lowKey = createDESKey(keyBytes, 0);
1118 Key middleKey = createDESKey(keyBytes, 7);
1119 Key highKey = createDESKey(keyBytes, 14);
1120 Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
1121 des.init(Cipher.ENCRYPT_MODE, lowKey);
1122 byte[] lowResponse = des.doFinal(challenge);
1123 des.init(Cipher.ENCRYPT_MODE, middleKey);
1124 byte[] middleResponse = des.doFinal(challenge);
1125 des.init(Cipher.ENCRYPT_MODE, highKey);
1126 byte[] highResponse = des.doFinal(challenge);
1127 byte[] lmResponse = new byte[24];
1128 System.arraycopy(lowResponse, 0, lmResponse, 0, 8);
1129 System.arraycopy(middleResponse, 0, lmResponse, 8, 8);
1130 System.arraycopy(highResponse, 0, lmResponse, 16, 8);
1137 * Creates the LMv2 Response from the given hash, client data, and
1140 * @param hash The NTLMv2 Hash.
1141 * @param clientData The client data (blob or client challenge).
1142 * @param challenge The server challenge from the Type 2 message.
1144 * @return The response (either NTLMv2 or LMv2, depending on the
1147 private static byte[] lmv2Response(byte[] hash, byte[] clientData,
1149 byte[] data = new byte[challenge.length + clientData.length];
1150 System.arraycopy(challenge, 0, data, 0, challenge.length);
1151 System.arraycopy(clientData, 0, data, challenge.length,
1153 byte[] mac = hmacMD5(data, hash);
1154 byte[] lmv2Response = new byte[mac.length + clientData.length];
1155 System.arraycopy(mac, 0, lmv2Response, 0, mac.length);
1156 System.arraycopy(clientData, 0, lmv2Response, mac.length,
1158 return lmv2Response;
1162 * Creates the NTLMv2 blob from the given target information block and
1165 * @param targetInformation The target information block from the Type 2
1167 * @param clientChallenge The random 8-byte client challenge.
1169 * @return The blob, used in the calculation of the NTLMv2 Response.
1171 private static byte[] createBlob(byte[] targetInformation,
1172 byte[] clientChallenge) {
1173 byte[] blobSignature = new byte[] {
1174 (byte) 0x01, (byte) 0x01, (byte) 0x00, (byte) 0x00
1176 byte[] reserved = new byte[] {
1177 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1179 byte[] unknown1 = new byte[] {
1180 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1182 byte[] unknown2 = new byte[] {
1183 (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
1185 long time = System.currentTimeMillis();
1186 time += 11644473600000l; // milliseconds from January 1, 1601 -> epoch.
1187 time *= 10000; // tenths of a microsecond.
1188 // convert to little-endian byte array.
1189 byte[] timestamp = new byte[8];
1190 for (int i = 0; i < 8; i++) {
1191 timestamp[i] = (byte) time;
1194 byte[] blob = new byte[blobSignature.length + reserved.length +
1195 timestamp.length + clientChallenge.length +
1196 unknown1.length + targetInformation.length +
1199 System.arraycopy(blobSignature, 0, blob, offset, blobSignature.length);
1200 offset += blobSignature.length;
1201 System.arraycopy(reserved, 0, blob, offset, reserved.length);
1202 offset += reserved.length;
1203 System.arraycopy(timestamp, 0, blob, offset, timestamp.length);
1204 offset += timestamp.length;
1205 System.arraycopy(clientChallenge, 0, blob, offset,
1206 clientChallenge.length);
1207 offset += clientChallenge.length;
1208 System.arraycopy(unknown1, 0, blob, offset, unknown1.length);
1209 offset += unknown1.length;
1210 System.arraycopy(targetInformation, 0, blob, offset,
1211 targetInformation.length);
1212 offset += targetInformation.length;
1213 System.arraycopy(unknown2, 0, blob, offset, unknown2.length);
1218 * Calculates the HMAC-MD5 hash of the given data using the specified
1221 * @param data The data for which the hash will be calculated.
1222 * @param key The hashing key.
1224 * @return The HMAC-MD5 hash of the given data.
1226 private static byte[] hmacMD5(byte[] data, byte[] key) {
1227 byte[] ipad = new byte[64];
1228 byte[] opad = new byte[64];
1229 for (int i = 0; i < 64; i++) {
1230 ipad[i] = (byte) 0x36;
1231 opad[i] = (byte) 0x5c;
1233 for (int i = key.length - 1; i >= 0; i--) {
1237 byte[] content = new byte[data.length + 64];
1238 System.arraycopy(ipad, 0, content, 0, 64);
1239 System.arraycopy(data, 0, content, 64, data.length);
1240 MD5 md5 = new MD5();
1241 md5.update(content, 0, content.length);
1242 data = new byte[md5.getDigestSize()];
1243 md5.doFinal(data, 0);
1244 content = new byte[data.length + 64];
1245 System.arraycopy(opad, 0, content, 0, 64);
1246 System.arraycopy(data, 0, content, 64, data.length);
1248 md5.update(content, 0, content.length);
1249 byte[] ret = new byte[md5.getDigestSize()];
1250 md5.doFinal(ret, 0);
1255 * Creates a DES encryption key from the given key material.
1257 * @param bytes A byte array containing the DES key material.
1258 * @param offset The offset in the given byte array at which
1259 * the 7-byte key material starts.
1261 * @return A DES encryption key created from the key material
1262 * starting at the specified offset in the given byte array.
1265 private static Key createDESKey(byte[] bytes, int offset) {
1266 byte[] keyBytes = new byte[7];
1267 System.arraycopy(bytes, offset, keyBytes, 0, 7);
1268 byte[] material = new byte[8];
1269 material[0] = keyBytes[0];
1270 material[1] = (byte) (keyBytes[0] << 7 | (keyBytes[1] & 0xff) >>> 1);
1271 material[2] = (byte) (keyBytes[1] << 6 | (keyBytes[2] & 0xff) >>> 2);
1272 material[3] = (byte) (keyBytes[2] << 5 | (keyBytes[3] & 0xff) >>> 3);
1273 material[4] = (byte) (keyBytes[3] << 4 | (keyBytes[4] & 0xff) >>> 4);
1274 material[5] = (byte) (keyBytes[4] << 3 | (keyBytes[5] & 0xff) >>> 5);
1275 material[6] = (byte) (keyBytes[5] << 2 | (keyBytes[6] & 0xff) >>> 6);
1276 material[7] = (byte) (keyBytes[6] << 1);
1277 oddParity(material);
1278 return new SecretKeySpec(material, "DES");
1283 * Applies odd parity to the given byte array.
1285 * @param bytes The data whose parity bits are to be adjusted for
1288 private static void oddParity(byte[] bytes) {
1289 for (int i = 0; i < bytes.length; i++) {
1291 boolean needsParity = (((b >>> 7) ^ (b >>> 6) ^ (b >>> 5) ^
1292 (b >>> 4) ^ (b >>> 3) ^ (b >>> 2) ^
1293 (b >>> 1)) & 0x01) == 0;
1295 bytes[i] |= (byte) 0x01;
1297 bytes[i] &= (byte) 0xfe;