void QXmppIncomingClientPrivate::checkCredentials (const QByteArray &response)
{
QXmppPasswordRequest request;
request.setDomain (domain);
request.setUsername (saslServer->username());
if (saslServer->mechanism() == "PLAIN")
{
request.setPassword (saslServer->password());
QXmppPasswordReply *reply = passwordChecker->checkPassword (request);
reply->setParent (q);
reply->setProperty ("__sasl_raw", response);
QObject::connect (reply, SIGNAL (finished()),
q, SLOT (onPasswordReply()));
}
else if (saslServer->mechanism() == "DIGEST-MD5")
{
QXmppPasswordReply *reply = passwordChecker->getDigest (request);
reply->setParent (q);
reply->setProperty ("__sasl_raw", response);
QObject::connect (reply, SIGNAL (finished()),
q, SLOT (onDigestReply()));
}
}
void QXmppIncomingClient::onDigestReply()
{
QXmppPasswordReply *reply = qobject_cast<QXmppPasswordReply *> (sender());
if (!reply)
return;
reply->deleteLater();
if (reply->error() == QXmppPasswordReply::TemporaryError)
{
warning (QString ("Temporary authentication failure for '%1' from %2").arg (d->saslServer->username(), d->origin()));
updateCounter ("incoming-client.auth.temporary-auth-failure");
sendPacket (QXmppSaslFailure ("temporary-auth-failure"));
disconnectFromHost();
return;
}
QByteArray challenge;
d->saslServer->setPasswordDigest (reply->digest());
QXmppSaslServer::Response result = d->saslServer->respond (reply->property ("__sasl_raw").toByteArray(), challenge);
if (result != QXmppSaslServer::Challenge)
{
warning (QString ("Authentication failed for '%1' from %2").arg (d->saslServer->username(), d->origin()));
updateCounter ("incoming-client.auth.not-authorized");
sendPacket (QXmppSaslFailure ("not-authorized"));
disconnectFromHost();
return;
}
// send new challenge
sendPacket (QXmppSaslChallenge (challenge));
}
void QXmppIncomingClient::onPasswordReply()
{
QXmppPasswordReply *reply = qobject_cast<QXmppPasswordReply*>(sender());
if (!reply)
return;
reply->deleteLater();
const QString username = reply->property("__sasl_username").toString();
switch (reply->error()) {
case QXmppPasswordReply::NoError:
d->username = username;
info(QString("Authentication succeeded for '%1'").arg(username));
sendData("<success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>");
break;
case QXmppPasswordReply::AuthorizationError:
warning(QString("Authentication failed for '%1'").arg(username));
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><not-authorized/></failure>");
disconnectFromHost();
break;
case QXmppPasswordReply::TemporaryError:
warning(QString("Temporary authentication failure for '%1'").arg(username));
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><temporary-auth-failure/></failure>");
disconnectFromHost();
break;
}
}
QXmppPasswordReply *QXmppPasswordChecker::checkPassword(const QXmppPasswordRequest &request)
{
QXmppPasswordReply *reply = new QXmppPasswordReply;
QString secret;
QXmppPasswordReply::Error error = getPassword(request, secret);
if (error == QXmppPasswordReply::NoError) {
if (request.password() != secret)
reply->setError(QXmppPasswordReply::AuthorizationError);
} else {
reply->setError(error);
}
// reply is finished
reply->finishLater();
return reply;
}
QXmppPasswordReply *QXmppPasswordChecker::getDigest(const QXmppPasswordRequest &request)
{
QXmppPasswordReply *reply = new QXmppPasswordReply;
QString secret;
QXmppPasswordReply::Error error = getPassword(request, secret);
if (error == QXmppPasswordReply::NoError) {
reply->setDigest(QCryptographicHash::hash(
(request.username() + ":" + request.domain() + ":" + secret).toUtf8(),
QCryptographicHash::Md5));
} else {
reply->setError(error);
}
// reply is finished
reply->finishLater();
return reply;
}
void QXmppIncomingClient::onDigestReply()
{
QXmppPasswordReply *reply = qobject_cast<QXmppPasswordReply*>(sender());
if (!reply)
return;
reply->deleteLater();
const QMap<QByteArray, QByteArray> saslResponse = QXmppSaslDigestMd5::parseMessage(reply->property("__sasl_raw").toByteArray());
const QString username = QString::fromUtf8(saslResponse.value("username"));
if (reply->error() == QXmppPasswordReply::TemporaryError) {
warning(QString("Temporary authentication failure for '%1'").arg(username));
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><temporary-auth-failure/></failure>");
disconnectFromHost();
return;
}
d->saslDigest.setSecret(reply->digest());
d->saslDigest.setDigestUri(saslResponse.value("digest-uri"));
d->saslDigest.setNc(saslResponse.value("nc"));
d->saslDigest.setCnonce(saslResponse.value("cnonce"));
if (saslResponse.value("response") != d->saslDigest.calculateDigest(
QByteArray("AUTHENTICATE:") + d->saslDigest.digestUri()))
{
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><not-authorized/></failure>");
disconnectFromHost();
return;
}
// send new challenge
d->username = username;
d->saslStep = 2;
QMap<QByteArray, QByteArray> challenge;
challenge["rspauth"] = d->saslDigest.calculateDigest(
QByteArray(":") + d->saslDigest.digestUri());
const QByteArray data = QXmppSaslDigestMd5::serializeMessage(challenge).toBase64();
sendData("<challenge xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>" + data +"</challenge>");
}
void QXmppIncomingClient::onPasswordReply()
{
QXmppPasswordReply *reply = qobject_cast<QXmppPasswordReply *> (sender());
if (!reply)
return;
reply->deleteLater();
const QString jid = QString ("%1@%2").arg (d->saslServer->username(), d->domain);
switch (reply->error())
{
case QXmppPasswordReply::NoError:
d->jid = jid;
info (QString ("Authentication succeeded for '%1' from %2").arg (d->jid, d->origin()));
updateCounter ("incoming-client.auth.success");
sendPacket (QXmppSaslSuccess());
handleStart();
break;
case QXmppPasswordReply::AuthorizationError:
warning (QString ("Authentication failed for '%1' from %2").arg (jid, d->origin()));
updateCounter ("incoming-client.auth.not-authorized");
sendPacket (QXmppSaslFailure ("not-authorized"));
disconnectFromHost();
break;
case QXmppPasswordReply::TemporaryError:
warning (QString ("Temporary authentication failure for '%1' from %2").arg (jid, d->origin()));
updateCounter ("incoming-client.auth.temporary-auth-failure");
sendPacket (QXmppSaslFailure ("temporary-auth-failure"));
disconnectFromHost();
break;
}
}
void QXmppIncomingClient::handleStanza(const QDomElement &nodeRecv)
{
const QString ns = nodeRecv.namespaceURI();
if (d->idleTimer->interval())
d->idleTimer->start();
if (ns == ns_tls && nodeRecv.tagName() == "starttls")
{
sendData("<proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
socket()->flush();
socket()->startServerEncryption();
return;
}
else if (ns == ns_sasl)
{
if (nodeRecv.tagName() == "auth")
{
const QString mechanism = nodeRecv.attribute("mechanism");
if (mechanism == "PLAIN")
{
QList<QByteArray> auth = QByteArray::fromBase64(nodeRecv.text().toAscii()).split('\0');
if (auth.size() != 3)
{
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><incorrect-encoding/></failure>");
disconnectFromHost();
return;
}
QXmppPasswordRequest request;
request.setDomain(d->domain);
request.setUsername(QString::fromUtf8(auth[1]));
request.setPassword(QString::fromUtf8(auth[2]));
if (!d->passwordChecker) {
// FIXME: what type of failure?
warning(QString("Cannot authenticate '%1', no password checker").arg(request.username()));
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>");
disconnectFromHost();
return;
}
QXmppPasswordReply *reply = d->passwordChecker->checkPassword(request);
reply->setParent(this);
reply->setProperty("__sasl_username", request.username());
connect(reply, SIGNAL(finished()), this, SLOT(onPasswordReply()));
}
else if (mechanism == "DIGEST-MD5")
{
// generate nonce
d->saslDigest.setNonce(QXmppSaslDigestMd5::generateNonce());
d->saslDigest.setQop("auth");
d->saslStep = 1;
QMap<QByteArray, QByteArray> challenge;
challenge["nonce"] = d->saslDigest.nonce();
challenge["realm"] = d->domain.toUtf8();
challenge["qop"] = d->saslDigest.qop();
challenge["charset"] = "utf-8";
challenge["algorithm"] = "md5-sess";
const QByteArray data = QXmppSaslDigestMd5::serializeMessage(challenge).toBase64();
sendData("<challenge xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>" + data +"</challenge>");
}
else
{
// unsupported method
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'></failure>");
disconnectFromHost();
return;
}
}
else if (nodeRecv.tagName() == "response")
{
if (d->saslStep == 1)
{
const QByteArray raw = QByteArray::fromBase64(nodeRecv.text().toAscii());
QMap<QByteArray, QByteArray> saslResponse = QXmppSaslDigestMd5::parseMessage(raw);
// check credentials
const QString username = QString::fromUtf8(saslResponse.value("username"));
if (!d->passwordChecker) {
// FIXME: what type of failure?
warning(QString("Cannot authenticate '%1', no password checker").arg(username));
sendData("<failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>");
disconnectFromHost();
return;
}
QXmppPasswordRequest request;
request.setUsername(username);
request.setDomain(d->domain);
QXmppPasswordReply *reply = d->passwordChecker->getDigest(request);
reply->setParent(this);
reply->setProperty("__sasl_raw", raw);
connect(reply, SIGNAL(finished()), this, SLOT(onDigestReply()));
}
else if (d->saslStep == 2)
{
// authentication succeeded
d->saslStep = 3;
info(QString("Authentication succeeded for '%1'").arg(d->username));
sendData("<success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>");
}
}
}
else if (ns == ns_client)
{
if (nodeRecv.tagName() == "iq")
{
const QString type = nodeRecv.attribute("type");
if (QXmppBindIq::isBindIq(nodeRecv) && type == "set")
{
QXmppBindIq bindSet;
bindSet.parse(nodeRecv);
d->resource = bindSet.resource().trimmed();
if (d->resource.isEmpty())
d->resource = generateStanzaHash();
QXmppBindIq bindResult;
bindResult.setType(QXmppIq::Result);
bindResult.setId(bindSet.id());
bindResult.setJid(jid());
sendPacket(bindResult);
// bound
emit connected();
return;
}
else if (QXmppSessionIq::isSessionIq(nodeRecv) && type == "set")
{
QXmppSessionIq sessionSet;
sessionSet.parse(nodeRecv);
QXmppIq sessionResult;
sessionResult.setType(QXmppIq::Result);
sessionResult.setId(sessionSet.id());
sessionResult.setTo(jid());
sendPacket(sessionResult);
return;
}
}
// check the sender is legitimate
const QString from = nodeRecv.attribute("from");
if (!from.isEmpty() && from != jid() && from != jidToBareJid(jid()))
{
warning(QString("Received a stanza from unexpected JID %1").arg(from));
return;
}
// process unhandled stanzas
if (nodeRecv.tagName() == "iq" ||
nodeRecv.tagName() == "message" ||
nodeRecv.tagName() == "presence")
{
QDomElement nodeFull(nodeRecv);
// if the sender is empty, set it to the appropriate JID
if (nodeFull.attribute("from").isEmpty())
{
if (nodeFull.tagName() == "presence" &&
(nodeFull.attribute("type") == "subscribe" ||
nodeFull.attribute("type") == "subscribed"))
nodeFull.setAttribute("from", jidToBareJid(jid()));
else
nodeFull.setAttribute("from", jid());
}
// if the recipient is empty, set it to the local domain
if (nodeFull.attribute("to").isEmpty())
nodeFull.setAttribute("to", d->domain);
// emit stanza for processing by server
emit elementReceived(nodeFull);
}
}
}
