*/
Semaphore okToRecieve = null;
+ /** true iff this is the first request to be made on this socket */
+ boolean firstRequest = true;
+
/** cache for resolveAndCheckIfFirewalled() */
static Hashtable resolvedHosts = new Hashtable();
- /** if any request encounters an IOException, the entire HTTP connection is invalidated */
- boolean invalid = false;
-
/** true iff we are allowed to skip the resolve check (only allowed when we're downloading the PAC script) */
boolean skipResolveCheck = false;
}
/** Performs an HTTP GET request */
- public HTTPInputStream GET() throws IOException { return makeRequest(null, null); }
+ public InputStream GET() throws IOException { return makeRequest(null, null); }
/** Performs an HTTP POST request; content is appended to the headers (so it should include a blank line to delimit the beginning of the body) */
- public HTTPInputStream POST(String contentType, String content) throws IOException { return makeRequest(contentType, content); }
+ public InputStream POST(String contentType, String content) throws IOException { return makeRequest(contentType, content); }
/**
* This method isn't synchronized; however, only one thread can be in the inner synchronized block at a time, and the rest of
* the method is protected by in-order one-at-a-time semaphore lock-steps
*/
- private HTTPInputStream makeRequest(String contentType, String content) throws IOException {
+ private InputStream makeRequest(String contentType, String content) throws IOException {
// Step 1: send the request and establish a semaphore to stop any requests that pipeline after us
Semaphore blockOn = null;
Semaphore releaseMe = null;
synchronized(this) {
- if (invalid) throw new HTTPException("connection failed on a previous pipelined call");
try {
connect();
sendRequest(contentType, content);
} catch (IOException e) {
- invalid = true;
+ reset();
throw e;
}
blockOn = okToRecieve;
boolean doRelease = true;
try {
if (blockOn != null) blockOn.block();
- if (invalid) throw new HTTPException("connection failed on a previous pipelined call");
+
+ // previous call wrecked the socket connection, but we already sent our request, so we can't just retry --
+ // this could cause the server to receive the request twice, which could be bad (think of the case where the
+ // server call causes Amazon.com to ship you an item with one-click purchasing).
+ if (sock == null)
+ throw new HTTPException("a previous pipelined call messed up the socket");
Hashtable h = in == null ? null : parseHeaders(in);
if (h == null) {
+ if (firstRequest) throw new HTTPException("server closed the socket with no response");
// sometimes the server chooses to close the stream between requests
- in = null; sock = null;
+ reset();
releaseMe.release();
return makeRequest(contentType, content);
}
if (h.get("HTTP").equals("1.0") && h.get("content-length") == null) {
if (Log.on) Log.log(this, "proxy returned an HTTP/1.0 reply with no content-length...");
- in = null; sock = null;
+ reset();
} else {
int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
new HTTPInputStream(in, cl, releaseMe).close();
if (h.get("HTTP").equals("1.0") && h.get("content-length") == null)
throw new HTTPException("XWT does not support HTTP/1.0 servers which fail to return the Content-Length header");
int cl = h.get("content-length") == null ? -1 : Integer.parseInt(h.get("content-length").toString());
- HTTPInputStream ret = new HTTPInputStream(in, cl, releaseMe);
+ InputStream ret = new HTTPInputStream(in, cl, releaseMe);
+ if ("gzip".equals(h.get("content-encoding"))) ret = new java.util.zip.GZIPInputStream(ret);
doRelease = false;
return ret;
}
- } catch (IOException e) { invalid = true; throw e;
+ } catch (IOException e) { reset(); throw e;
} finally { if (doRelease) releaseMe.release();
}
}
} catch (UnknownHostException uhe) { }
if (Platform.detectProxy() == null) throw new HTTPException("could not resolve hostname \"" + host + "\" and no proxy configured");
+ if (Log.on) Log.log(this, " could not resolve host " + host + "; using xmlrpc.xwt.org to ensure security");
+ try {
+ JS.Array args = new JS.Array();
+ args.addElement(host);
+ Object ret = new XMLRPC("http://xmlrpc.xwt.org/RPC2/", "dns.resolve").call(args);
+ if (ret == null || !(ret instanceof String)) throw new Exception(" xmlrpc.xwt.org returned non-String: " + ret);
+ resolvedHosts.put(host, ret);
+ return;
+ } catch (Throwable e) {
+ throw new HTTPException("exception while attempting to use xmlrpc.xwt.org to resolve " + host + ": " + e);
+ }
}
// Everything Else ////////////////////////////////////////////////////////////////////////////
private synchronized void connect() throws IOException {
+ if (originalUrl.equals("stdio:")) {
+ in = new BufferedInputStream(System.in);
+ return;
+ }
if (sock != null) {
if (in == null) in = new BufferedInputStream(sock.getInputStream());
return;
if (Log.verbose) Log.log(this, "creating HTTP object for connection to " + host + ":" + port);
Proxy pi = Platform.detectProxy();
- if (sock == null && pi != null && pi.proxyAutoConfigFunction != null) sock = attemptPAC(pi.proxyAutoConfigFunction);
- if (sock == null && pi != null && ssl && pi.httpsProxyHost != null) sock = attemptHttpProxy(pi.httpsProxyHost, pi.httpsProxyPort);
- if (sock == null && pi != null && pi.httpProxyHost != null) sock = attemptHttpProxy(pi.httpProxyHost, pi.httpProxyPort);
- if (sock == null && pi != null && pi.socksProxyHost != null) sock = attemptSocksProxy(pi.socksProxyHost, pi.socksProxyPort);
+ OUTER: do {
+ if (pi != null) {
+ for(int i=0; i<pi.excluded.length; i++) if (host.equals(pi.excluded[i])) break OUTER;
+ if (sock == null && pi.proxyAutoConfigFunction != null) sock = attemptPAC(pi.proxyAutoConfigFunction);
+ if (sock == null && ssl && pi.httpsProxyHost != null) sock = attemptHttpProxy(pi.httpsProxyHost, pi.httpsProxyPort);
+ if (sock == null && pi.httpProxyHost != null) sock = attemptHttpProxy(pi.httpProxyHost, pi.httpProxyPort);
+ if (sock == null && pi.socksProxyHost != null) sock = attemptSocksProxy(pi.socksProxyHost, pi.socksProxyPort);
+ }
+ } while (false);
proxied = sock != null;
if (sock == null) sock = attemptDirect();
if (sock == null) throw new HTTPException("unable to contact host " + host);
public void sendRequest(String contentType, String content) throws IOException {
- PrintWriter pw = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
+ PrintWriter pw = new PrintWriter(new OutputStreamWriter(originalUrl.equals("stdio:") ? System.out : sock.getOutputStream()));
if (content != null) {
pw.print("POST " + path + " HTTP/1.1\r\n");
int contentLength = content.substring(0, 2).equals("\r\n") ?
}
pw.print("User-Agent: XWT\r\n");
+ pw.print("Accept-encoding: gzip\r\n");
pw.print("Host: " + (host + (port == 80 ? "" : (":" + port))) + "\r\n");
if (proxied) pw.print("X-RequestOrigin: " + Main.originHost + "\r\n");
if (Log.on) Log.log(this, "Proxy AuthChallenge: " + h0.get("proxy-authenticate"));
Hashtable h = parseAuthenticationChallenge(h0.get("proxy-authenticate").toString());
String style = h.get("AUTHTYPE").toString();
- String realm = h.get("realm").toString();
+ String realm = (String)h.get("realm");
+
+ if (style.equals("NTLM") && Proxy.Authorization.authorization2 == null) {
+ Log.log(this, "Proxy identified itself as NTLM, sending Type 1 packet");
+ Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(Proxy.NTLM.type1);
+ return;
+ }
if (!realm.equals("Digest") || Proxy.Authorization.authorization2 == null || !"true".equals(h.get("stale")))
Proxy.Authorization.getPassword(realm, style, sock.getInetAddress().getHostAddress(), Proxy.Authorization.authorization);
(h.get("opaque") == null ? "" : ("opaque=\"" + h.get("opaque") + "\", ")) +
"response=\"" + H(H(A1) + ":" + h.get("nonce") + ":" + H(A2)) + "\", " +
"algorithm=MD5";
+
+ } else if (style.equals("NTLM")) {
+ Log.log(this, "Proxy identified itself as NTLM, got Type 2 packet");
+ byte[] type2 = Base64.decode(((String)h0.get("proxy-authenticate")).substring(5).trim());
+ for(int i=0; i<type2.length; i += 4) {
+ String log = "";
+ if (i<type2.length) log += Integer.toString(type2[i] & 0xff, 16) + " ";
+ if (i+1<type2.length) log += Integer.toString(type2[i+1] & 0xff, 16) + " ";
+ if (i+2<type2.length) log += Integer.toString(type2[i+2] & 0xff, 16) + " ";
+ if (i+3<type2.length) log += Integer.toString(type2[i+3] & 0xff, 16) + " ";
+ Log.log(this, log);
+ }
+ // FIXME: need to keep the connection open between type1 and type3
+ // FIXME: finish this
+ //byte[] type3 = Proxy.NTLM.getResponse(
+ //Proxy.Authorization.authorization2 = "NTLM " + Base64.encode(type3));
}
}
private int contentLength = 0;
public int getContentLength() { return contentLength; }
- HTTPInputStream(InputStream in, int length, Semaphore releaseMe) {
+ HTTPInputStream(InputStream in, int length, Semaphore releaseMe) throws IOException {
super(in);
this.releaseMe = releaseMe;
this.contentLength = length;
int i = super.read();
if (i == -1) throw new HTTPException("encountered end of stream while reading chunk length");
- // FIXME: handle chunking extensions
+ // FEATURE: handle chunking extensions
if (i == '\r') {
super.read(); // LF
break;
}
return ret;
} finally {
- if (!good) invalid = true;
+ if (!good) reset();
}
}
}
}
+ void reset() {
+ firstRequest = true;
+ in = null;
+ sock = null;
+ }
+
// Misc Helpers ///////////////////////////////////////////////////////////////////////////////////
try {
org.xwt.js.JS.Array arr = new org.xwt.js.JS.Array();
arr.addElement(((JS.Exn)e).getObject());
- // FIXME
- //XWT.recursivePrintObject.call();
} catch (Exception e2) {
Log.log(Platform.class, e);
}
if (authorization != oldAuth) return;
if (Log.on) Log.log(Authorization.class, "displaying proxy authorization dialog");
- MessageQueue.add(new Message() {
+ Message.Q.add(new Message() {
public void perform() {
Box b = new Box();
- Template.getTemplate("org.xwt.builtin.proxy_authorization", null).apply(b, null, null, null, 0, 0);
+ Template t = Template.getTemplate((Res)Main.builtin.get("org/xwt/builtin/proxy_authorization.xwt"));
+ t.apply(b, null, null);
b.put("realm", realm);
b.put("proxyIP", proxyIP);
}
// ProxyAutoConfigRootScope ////////////////////////////////////////////////////////////////////
- public static class ProxyAutoConfigRootScope extends JS.Scope {
+ public static class ProxyAutoConfigRootScope extends JS.GlobalScope {
public ProxyAutoConfigRootScope() { super(null); }
- // FIXME: needs "standard objects"
-
public Object get(Object name) {
if (name.equals("isPlainHostName")) return isPlainHostName;
else if (name.equals("dnsDomainIs")) return dnsDomainIs;
}
- }
+ /**
+ * An implementation of Microsoft's proprietary NTLM authentication protocol. This code was derived from Eric
+ * Glass's work, and is copyright as follows:
+ *
+ * Copyright (c) 2003 Eric Glass (eglass1 at comcast.net).
+ *
+ * Permission to use, copy, modify, and distribute this document for any purpose and without any fee is hereby
+ * granted, provided that the above copyright notice and this list of conditions appear in all copies.
+ * The most current version of this document may be obtained from http://davenport.sourceforge.net/ntlm.html .
+ */
+ public static class NTLM {
+
+ public static final byte[] type1 = new byte[] { 0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00, 0x01,
+ 0x00, 0x00, 0x00, 0x00, 0x02, 0x02, 0x00 };
+
+ /**
+ * Calculates the NTLM Response for the given challenge, using the
+ * specified password.
+ *
+ * @param password The user's password.
+ * @param challenge The Type 2 challenge from the server.
+ *
+ * @return The NTLM Response.
+ */
+ public static byte[] getNTLMResponse(String password, byte[] challenge)
+ throws Exception {
+ byte[] ntlmHash = ntlmHash(password);
+ return lmResponse(ntlmHash, challenge);
+ }
+
+ /**
+ * Calculates the LM Response for the given challenge, using the specified
+ * password.
+ *
+ * @param password The user's password.
+ * @param challenge The Type 2 challenge from the server.
+ *
+ * @return The LM Response.
+ */
+ public static byte[] getLMResponse(String password, byte[] challenge)
+ throws Exception {
+ byte[] lmHash = lmHash(password);
+ return lmResponse(lmHash, challenge);
+ }
+
+ /**
+ * Calculates the NTLMv2 Response for the given challenge, using the
+ * specified authentication target, username, password, target information
+ * block, and client challenge.
+ *
+ * @param target The authentication target (i.e., domain).
+ * @param user The username.
+ * @param password The user's password.
+ * @param targetInformation The target information block from the Type 2
+ * message.
+ * @param challenge The Type 2 challenge from the server.
+ * @param clientChallenge The random 8-byte client challenge.
+ *
+ * @return The NTLMv2 Response.
+ */
+ public static byte[] getNTLMv2Response(String target, String user,
+ String password, byte[] targetInformation, byte[] challenge,
+ byte[] clientChallenge) throws Exception {
+ byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
+ byte[] blob = createBlob(targetInformation, clientChallenge);
+ return lmv2Response(ntlmv2Hash, blob, challenge);
+ }
+
+ /**
+ * Calculates the LMv2 Response for the given challenge, using the
+ * specified authentication target, username, password, and client
+ * challenge.
+ *
+ * @param target The authentication target (i.e., domain).
+ * @param user The username.
+ * @param password The user's password.
+ * @param challenge The Type 2 challenge from the server.
+ * @param clientChallenge The random 8-byte client challenge.
+ *
+ * @return The LMv2 Response.
+ */
+ public static byte[] getLMv2Response(String target, String user,
+ String password, byte[] challenge, byte[] clientChallenge)
+ throws Exception {
+ byte[] ntlmv2Hash = ntlmv2Hash(target, user, password);
+ return lmv2Response(ntlmv2Hash, clientChallenge, challenge);
+ }
+
+ /**
+ * Calculates the NTLM2 Session Response for the given challenge, using the
+ * specified password and client challenge.
+ *
+ * @param password The user's password.
+ * @param challenge The Type 2 challenge from the server.
+ * @param clientChallenge The random 8-byte client challenge.
+ *
+ * @return The NTLM2 Session Response. This is placed in the NTLM
+ * response field of the Type 3 message; the LM response field contains
+ * the client challenge, null-padded to 24 bytes.
+ */
+ public static byte[] getNTLM2SessionResponse(String password,
+ byte[] challenge, byte[] clientChallenge) throws Exception {
+ byte[] ntlmHash = ntlmHash(password);
+ MD5Digest md5 = new MD5Digest();
+ md5.update(challenge, 0, challenge.length);
+ md5.update(clientChallenge, 0, clientChallenge.length);
+ byte[] sessionHash = new byte[8];
+ byte[] md5_out = new byte[md5.getDigestSize()];
+ md5.doFinal(md5_out, 0);
+ System.arraycopy(md5_out, 0, sessionHash, 0, 8);
+ return lmResponse(ntlmHash, sessionHash);
+ }
+ /**
+ * Creates the LM Hash of the user's password.
+ *
+ * @param password The password.
+ *
+ * @return The LM Hash of the given password, used in the calculation
+ * of the LM Response.
+ */
+ private static byte[] lmHash(String password) throws Exception {
+ /*
+ byte[] oemPassword = password.toUpperCase().getBytes("US-ASCII");
+ int length = java.lang.Math.min(oemPassword.length, 14);
+ byte[] keyBytes = new byte[14];
+ System.arraycopy(oemPassword, 0, keyBytes, 0, length);
+ Key lowKey = createDESKey(keyBytes, 0);
+ Key highKey = createDESKey(keyBytes, 7);
+ byte[] magicConstant = "KGS!@#$%".getBytes("US-ASCII");
+ Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
+ des.init(Cipher.ENCRYPT_MODE, lowKey);
+ byte[] lowHash = des.doFinal(magicConstant);
+ des.init(Cipher.ENCRYPT_MODE, highKey);
+ byte[] highHash = des.doFinal(magicConstant);
+ byte[] lmHash = new byte[16];
+ System.arraycopy(lowHash, 0, lmHash, 0, 8);
+ System.arraycopy(highHash, 0, lmHash, 8, 8);
+ return lmHash;
+ */
+ return null; // FIXME
+ }
+
+ /**
+ * Creates the NTLM Hash of the user's password.
+ *
+ * @param password The password.
+ *
+ * @return The NTLM Hash of the given password, used in the calculation
+ * of the NTLM Response and the NTLMv2 and LMv2 Hashes.
+ */
+ private static byte[] ntlmHash(String password) throws Exception {
+ byte[] unicodePassword = password.getBytes("UnicodeLittleUnmarked");
+ MD4Digest md4 = new MD4Digest();
+ md4.update(unicodePassword, 0, unicodePassword.length);
+ byte[] ret = new byte[md4.getDigestSize()];
+ return ret;
+ }
+
+ /**
+ * Creates the NTLMv2 Hash of the user's password.
+ *
+ * @param target The authentication target (i.e., domain).
+ * @param user The username.
+ * @param password The password.
+ *
+ * @return The NTLMv2 Hash, used in the calculation of the NTLMv2
+ * and LMv2 Responses.
+ */
+ private static byte[] ntlmv2Hash(String target, String user,
+ String password) throws Exception {
+ byte[] ntlmHash = ntlmHash(password);
+ String identity = user.toUpperCase() + target.toUpperCase();
+ return hmacMD5(identity.getBytes("UnicodeLittleUnmarked"), ntlmHash);
+ }
+
+ /**
+ * Creates the LM Response from the given hash and Type 2 challenge.
+ *
+ * @param hash The LM or NTLM Hash.
+ * @param challenge The server challenge from the Type 2 message.
+ *
+ * @return The response (either LM or NTLM, depending on the provided
+ * hash).
+ */
+ private static byte[] lmResponse(byte[] hash, byte[] challenge)
+ throws Exception {
+ /*
+ byte[] keyBytes = new byte[21];
+ System.arraycopy(hash, 0, keyBytes, 0, 16);
+ Key lowKey = createDESKey(keyBytes, 0);
+ Key middleKey = createDESKey(keyBytes, 7);
+ Key highKey = createDESKey(keyBytes, 14);
+ Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
+ des.init(Cipher.ENCRYPT_MODE, lowKey);
+ byte[] lowResponse = des.doFinal(challenge);
+ des.init(Cipher.ENCRYPT_MODE, middleKey);
+ byte[] middleResponse = des.doFinal(challenge);
+ des.init(Cipher.ENCRYPT_MODE, highKey);
+ byte[] highResponse = des.doFinal(challenge);
+ byte[] lmResponse = new byte[24];
+ System.arraycopy(lowResponse, 0, lmResponse, 0, 8);
+ System.arraycopy(middleResponse, 0, lmResponse, 8, 8);
+ System.arraycopy(highResponse, 0, lmResponse, 16, 8);
+ return lmResponse;
+ */
+ return null; // FIXME
+ }
+
+ /**
+ * Creates the LMv2 Response from the given hash, client data, and
+ * Type 2 challenge.
+ *
+ * @param hash The NTLMv2 Hash.
+ * @param clientData The client data (blob or client challenge).
+ * @param challenge The server challenge from the Type 2 message.
+ *
+ * @return The response (either NTLMv2 or LMv2, depending on the
+ * client data).
+ */
+ private static byte[] lmv2Response(byte[] hash, byte[] clientData,
+ byte[] challenge) throws Exception {
+ byte[] data = new byte[challenge.length + clientData.length];
+ System.arraycopy(challenge, 0, data, 0, challenge.length);
+ System.arraycopy(clientData, 0, data, challenge.length,
+ clientData.length);
+ byte[] mac = hmacMD5(data, hash);
+ byte[] lmv2Response = new byte[mac.length + clientData.length];
+ System.arraycopy(mac, 0, lmv2Response, 0, mac.length);
+ System.arraycopy(clientData, 0, lmv2Response, mac.length,
+ clientData.length);
+ return lmv2Response;
+ }
+
+ /**
+ * Creates the NTLMv2 blob from the given target information block and
+ * client challenge.
+ *
+ * @param targetInformation The target information block from the Type 2
+ * message.
+ * @param clientChallenge The random 8-byte client challenge.
+ *
+ * @return The blob, used in the calculation of the NTLMv2 Response.
+ */
+ private static byte[] createBlob(byte[] targetInformation,
+ byte[] clientChallenge) {
+ byte[] blobSignature = new byte[] {
+ (byte) 0x01, (byte) 0x01, (byte) 0x00, (byte) 0x00
+ };
+ byte[] reserved = new byte[] {
+ (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
+ };
+ byte[] unknown1 = new byte[] {
+ (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
+ };
+ byte[] unknown2 = new byte[] {
+ (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00
+ };
+ long time = System.currentTimeMillis();
+ time += 11644473600000l; // milliseconds from January 1, 1601 -> epoch.
+ time *= 10000; // tenths of a microsecond.
+ // convert to little-endian byte array.
+ byte[] timestamp = new byte[8];
+ for (int i = 0; i < 8; i++) {
+ timestamp[i] = (byte) time;
+ time >>>= 8;
+ }
+ byte[] blob = new byte[blobSignature.length + reserved.length +
+ timestamp.length + clientChallenge.length +
+ unknown1.length + targetInformation.length +
+ unknown2.length];
+ int offset = 0;
+ System.arraycopy(blobSignature, 0, blob, offset, blobSignature.length);
+ offset += blobSignature.length;
+ System.arraycopy(reserved, 0, blob, offset, reserved.length);
+ offset += reserved.length;
+ System.arraycopy(timestamp, 0, blob, offset, timestamp.length);
+ offset += timestamp.length;
+ System.arraycopy(clientChallenge, 0, blob, offset,
+ clientChallenge.length);
+ offset += clientChallenge.length;
+ System.arraycopy(unknown1, 0, blob, offset, unknown1.length);
+ offset += unknown1.length;
+ System.arraycopy(targetInformation, 0, blob, offset,
+ targetInformation.length);
+ offset += targetInformation.length;
+ System.arraycopy(unknown2, 0, blob, offset, unknown2.length);
+ return blob;
+ }
+
+ /**
+ * Calculates the HMAC-MD5 hash of the given data using the specified
+ * hashing key.
+ *
+ * @param data The data for which the hash will be calculated.
+ * @param key The hashing key.
+ *
+ * @return The HMAC-MD5 hash of the given data.
+ */
+ private static byte[] hmacMD5(byte[] data, byte[] key) throws Exception {
+ byte[] ipad = new byte[64];
+ byte[] opad = new byte[64];
+ for (int i = 0; i < 64; i++) {
+ ipad[i] = (byte) 0x36;
+ opad[i] = (byte) 0x5c;
+ }
+ for (int i = key.length - 1; i >= 0; i--) {
+ ipad[i] ^= key[i];
+ opad[i] ^= key[i];
+ }
+ byte[] content = new byte[data.length + 64];
+ System.arraycopy(ipad, 0, content, 0, 64);
+ System.arraycopy(data, 0, content, 64, data.length);
+ MD5Digest md5 = new MD5Digest();
+ md5.update(content, 0, content.length);
+ data = new byte[md5.getDigestSize()];
+ md5.doFinal(data, 0);
+ content = new byte[data.length + 64];
+ System.arraycopy(opad, 0, content, 0, 64);
+ System.arraycopy(data, 0, content, 64, data.length);
+ md5 = new MD5Digest();
+ md5.update(content, 0, content.length);
+ byte[] ret = new byte[md5.getDigestSize()];
+ md5.doFinal(ret, 0);
+ return ret;
+ }
+
+ /**
+ * Creates a DES encryption key from the given key material.
+ *
+ * @param bytes A byte array containing the DES key material.
+ * @param offset The offset in the given byte array at which
+ * the 7-byte key material starts.
+ *
+ * @return A DES encryption key created from the key material
+ * starting at the specified offset in the given byte array.
+ */
+ /*
+ private static Key createDESKey(byte[] bytes, int offset) {
+ byte[] keyBytes = new byte[7];
+ System.arraycopy(bytes, offset, keyBytes, 0, 7);
+ byte[] material = new byte[8];
+ material[0] = keyBytes[0];
+ material[1] = (byte) (keyBytes[0] << 7 | (keyBytes[1] & 0xff) >>> 1);
+ material[2] = (byte) (keyBytes[1] << 6 | (keyBytes[2] & 0xff) >>> 2);
+ material[3] = (byte) (keyBytes[2] << 5 | (keyBytes[3] & 0xff) >>> 3);
+ material[4] = (byte) (keyBytes[3] << 4 | (keyBytes[4] & 0xff) >>> 4);
+ material[5] = (byte) (keyBytes[4] << 3 | (keyBytes[5] & 0xff) >>> 5);
+ material[6] = (byte) (keyBytes[5] << 2 | (keyBytes[6] & 0xff) >>> 6);
+ material[7] = (byte) (keyBytes[6] << 1);
+ oddParity(material);
+ return new SecretKeySpec(material, "DES");
+ }
+ */
+
+ /**
+ * Applies odd parity to the given byte array.
+ *
+ * @param bytes The data whose parity bits are to be adjusted for
+ * odd parity.
+ */
+ private static void oddParity(byte[] bytes) {
+ for (int i = 0; i < bytes.length; i++) {
+ byte b = bytes[i];
+ boolean needsParity = (((b >>> 7) ^ (b >>> 6) ^ (b >>> 5) ^
+ (b >>> 4) ^ (b >>> 3) ^ (b >>> 2) ^
+ (b >>> 1)) & 0x01) == 0;
+ if (needsParity) {
+ bytes[i] |= (byte) 0x01;
+ } else {
+ bytes[i] &= (byte) 0xfe;
+ }
+ }
+ }
+
+ }
+ }
}