/**
* Event is enqueued only if necessary : - socks proxies do not need the reconnection feature so
* events are always forwarded for these. - http proxies events will be enqueued while handshake
* has not been completed or until connection was closed. If connection was prematurely closed
* previous events are discarded and only the session closed is delivered.
*
* @param evt the event to enqueue
*/
public void enqueueEventIfNecessary(final IoSessionEvent evt) {
logger.debug("??? >> Enqueue {}", evt);
if (proxyIoSession.getRequest() instanceof SocksProxyRequest) {
// No reconnection used
evt.deliverEvent();
return;
}
if (proxyIoSession.getHandler().isHandshakeComplete()) {
evt.deliverEvent();
} else {
if (evt.getType() == IoSessionEventType.CLOSED) {
if (proxyIoSession.isAuthenticationFailed()) {
proxyIoSession.getConnector().cancelConnectFuture();
discardSessionQueueEvents();
evt.deliverEvent();
} else {
discardSessionQueueEvents();
}
} else if (evt.getType() == IoSessionEventType.OPENED) {
// Enqueue event cause it will not reach IoHandler but deliver it to enable
// session creation.
enqueueSessionEvent(evt);
evt.deliverEvent();
} else {
enqueueSessionEvent(evt);
}
}
}
/**
* Computes the response to the DIGEST challenge.
*
* @param session the current session
* @param map the map holding the directives sent by the proxy
* @param method the HTTP verb
* @param pwd the password
* @param charsetName the name of the charset used for the challenge
* @param body the html body to be hashed for integrity calculations
*/
public static String computeResponseValue(
IoSession session,
HashMap<String, String> map,
String method,
String pwd,
String charsetName,
String body)
throws AuthenticationException, UnsupportedEncodingException {
byte[] hA1;
StringBuilder sb;
boolean isMD5Sess =
"md5-sess".equalsIgnoreCase(StringUtilities.getDirectiveValue(map, "algorithm", false));
if (!isMD5Sess || (session.getAttribute(SESSION_HA1) == null)) {
// Build A1
sb = new StringBuilder();
sb.append(
StringUtilities.stringTo8859_1(
StringUtilities.getDirectiveValue(map, "username", true)))
.append(':');
String realm =
StringUtilities.stringTo8859_1(StringUtilities.getDirectiveValue(map, "realm", false));
if (realm != null) {
sb.append(realm);
}
sb.append(':').append(pwd);
if (isMD5Sess) {
byte[] prehA1;
synchronized (md5) {
md5.reset();
prehA1 = md5.digest(sb.toString().getBytes(charsetName));
}
sb = new StringBuilder();
sb.append(ByteUtilities.asHex(prehA1));
sb.append(':')
.append(
StringUtilities.stringTo8859_1(
StringUtilities.getDirectiveValue(map, "nonce", true)));
sb.append(':')
.append(
StringUtilities.stringTo8859_1(
StringUtilities.getDirectiveValue(map, "cnonce", true)));
synchronized (md5) {
md5.reset();
hA1 = md5.digest(sb.toString().getBytes(charsetName));
}
session.setAttribute(SESSION_HA1, hA1);
} else {
synchronized (md5) {
md5.reset();
hA1 = md5.digest(sb.toString().getBytes(charsetName));
}
}
} else {
hA1 = (byte[]) session.getAttribute(SESSION_HA1);
}
sb = new StringBuilder(method);
sb.append(':');
sb.append(StringUtilities.getDirectiveValue(map, "uri", false));
String qop = StringUtilities.getDirectiveValue(map, "qop", false);
if ("auth-int".equalsIgnoreCase(qop)) {
ProxyIoSession proxyIoSession =
(ProxyIoSession) session.getAttribute(ProxyIoSession.PROXY_SESSION);
byte[] hEntity;
synchronized (md5) {
md5.reset();
hEntity = md5.digest(body.getBytes(proxyIoSession.getCharsetName()));
}
sb.append(':').append(hEntity);
}
byte[] hA2;
synchronized (md5) {
md5.reset();
hA2 = md5.digest(sb.toString().getBytes(charsetName));
}
sb = new StringBuilder();
sb.append(ByteUtilities.asHex(hA1));
sb.append(':').append(StringUtilities.getDirectiveValue(map, "nonce", true));
sb.append(":00000001:");
sb.append(StringUtilities.getDirectiveValue(map, "cnonce", true));
sb.append(':').append(qop).append(':');
sb.append(ByteUtilities.asHex(hA2));
byte[] hFinal;
synchronized (md5) {
md5.reset();
hFinal = md5.digest(sb.toString().getBytes(charsetName));
}
return ByteUtilities.asHex(hFinal);
}
