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/*
smpppdunsettled.cpp
Copyright (c) 2006 by Heiko Schaefer <heiko@rangun.de>
Kopete (c) 2002-2006 by the Kopete developers <kopete-devel@kde.org>
*************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; version 2 of the License. *
* *
*************************************************************************
*/
#include <cstdlib>
#include <openssl/md5.h>
#include <qregexp.h>
#include <kdebug.h>
#include <kstreamsocket.h>
#include "smpppdready.h"
#include "smpppdunsettled.h"
using namespace SMPPPD;
Unsettled * Unsettled::m_instance = NULL;
Unsettled::Unsettled() {}
Unsettled::~Unsettled() {}
Unsettled * Unsettled::instance() {
if(!m_instance) {
m_instance = new Unsettled();
}
return m_instance;
}
bool Unsettled::connect(Client * client, const QString& server, uint port) {
if(!socket(client) ||
socket(client)->state() != KNetwork::KStreamSocket::Connected ||
socket(client)->state() != KNetwork::KStreamSocket::Connecting) {
QString resolvedServer = server;
changeState(client, Ready::instance());
disconnect(client);
// since a lookup on a non-existant host can take a lot of time we
// try to get the IP of server before and we do the lookup ourself
KNetwork::KResolver resolver(server);
resolver.start();
if(resolver.wait(500)) {
KNetwork::KResolverResults results = resolver.results();
if(!results.empty()) {
QString ip = results[0].address().asInet().ipAddress().toString();
kdDebug(14312) << k_funcinfo << "Found IP-Address for " << server << ": " << ip << endl;
resolvedServer = ip;
} else {
kdWarning(14312) << k_funcinfo << "No IP-Address found for " << server << endl;
return false;
}
} else {
kdWarning(14312) << k_funcinfo << "Looking up hostname timed out, consider to use IP or correct host" << endl;
return false;
}
setSocket(client, new KNetwork::KStreamSocket(resolvedServer, QString::number(port)));
socket(client)->setBlocking(TRUE);
if(!socket(client)->connect()) {
kdDebug(14312) << k_funcinfo << "Socket Error: " << KNetwork::KStreamSocket::errorString(socket(client)->error()) << endl;
} else {
kdDebug(14312) << k_funcinfo << "Successfully connected to smpppd \"" << server << ":" << port << "\"" << endl;
static QString verRex = "^SuSE Meta pppd \\(smpppd\\), Version (.*)$";
static QString clgRex = "^challenge = (.*)$";
QRegExp ver(verRex);
QRegExp clg(clgRex);
QString response = read(client)[0];
if(response != QString::null &&
ver.exactMatch(response)) {
setServerID(client, response);
setServerVersion(client, ver.cap(1));
changeState(client, Ready::instance());
return true;
} else if(response != QString::null &&
clg.exactMatch(response)) {
if(password(client) != QString::null) {
// we are challenged, ok, respond
write(client, QString("response = %1\n").arg(make_response(clg.cap(1).stripWhiteSpace(), password(client))).latin1());
response = read(client)[0];
if(ver.exactMatch(response)) {
setServerID(client, response);
setServerVersion(client, ver.cap(1));
return true;
} else {
kdWarning(14312) << k_funcinfo << "SMPPPD responded: " << response << endl;
changeState(client, Ready::instance());
disconnect(client);
}
} else {
kdWarning(14312) << k_funcinfo << "SMPPPD requested a challenge, but no password was supplied!" << endl;
changeState(client, Ready::instance());
disconnect(client);
}
}
}
}
return false;
}
QString Unsettled::make_response(const QString& chex, const QString& password) const {
int size = chex.length ();
if (size & 1)
return "error";
size >>= 1;
// convert challenge from hex to bin
QString cbin;
for (int i = 0; i < size; i++) {
QString tmp = chex.mid (2 * i, 2);
cbin.append ((char) strtol (tmp.ascii (), 0, 16));
}
// calculate response
unsigned char rbin[MD5_DIGEST_LENGTH];
MD5state_st md5;
MD5_Init (&md5);
MD5_Update (&md5, cbin.ascii (), size);
MD5_Update (&md5, password.ascii(), password.length ());
MD5_Final (rbin, &md5);
// convert response from bin to hex
QString rhex;
for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
char buffer[3];
snprintf (buffer, 3, "%02x", rbin[i]);
rhex.append (buffer);
}
return rhex;
}
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