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/*
* GSSAPIAuthRequestHandler.h
*
* Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MAD_CORE_REQUESTHANDLER_GSSAPIAUTHREQUESTHANDLER_H_
#define MAD_CORE_REQUESTHANDLER_GSSAPIAUTHREQUESTHANDLER_H_
#include <Common/RequestHandler.h>
#include <Net/Packet.h>
#include <cstring>
#include <gssapi/gssapi.h>
#include <iostream>
namespace Mad {
namespace Core {
namespace RequestHandler {
// TODO Error handling
class GSSAPIAuthRequestHandler : public Common::RequestHandler {
private:
gss_ctx_id_t gssContext;
bool gssContinue, sentSignature;
public:
GSSAPIAuthRequestHandler() : gssContext(GSS_C_NO_CONTEXT), gssContinue(true), sentSignature(false) {}
virtual bool handlePacket(Net::Connection *connection, const Net::Packet &packet) {
if(isFinished())
return false;
if(packet.getType() != Net::Packet::TYPE_GSSAPI_AUTH)
return false; // TODO Logging
OM_uint32 majStat, minStat;
gss_buffer_desc recvBuffer, sendBuffer;
if(gssContinue) {
recvBuffer.length = packet.getLength();
recvBuffer.value = std::malloc(recvBuffer.length);
std::memcpy(recvBuffer.value, packet.getData(), recvBuffer.length);
majStat = gss_accept_sec_context(&minStat, &gssContext, GSS_C_NO_CREDENTIAL, &recvBuffer, GSS_C_NO_CHANNEL_BINDINGS, 0, 0, &sendBuffer, 0, 0, 0);
std::free(recvBuffer.value);
if(majStat == GSS_S_COMPLETE) {
std::cout << "GSS context established." << std::endl;
gssContinue = false;
}
else if(majStat != GSS_S_CONTINUE_NEEDED) {
gss_release_buffer(&minStat, &sendBuffer);
return false;
}
if(!connection->send(Net::Packet(Net::Packet::TYPE_GSSAPI_AUTH, packet.getRequestId(), sendBuffer.value, sendBuffer.length))) {
gss_release_buffer(&minStat, &sendBuffer);
return false;
}
gss_release_buffer(&minStat, &sendBuffer);
}
else if(!sentSignature) {
if(packet.getLength() != 0)
return false;
const gnutls_datum_t *cert = connection->getCertificate();
recvBuffer.length = cert->size;
recvBuffer.value = cert->data;
majStat = gss_get_mic(&minStat, gssContext, GSS_C_QOP_DEFAULT, &recvBuffer, &sendBuffer);
if(majStat != GSS_S_COMPLETE) {
gss_release_buffer(&minStat, &sendBuffer);
return false;
}
if(!connection->send(Net::Packet(Net::Packet::TYPE_GSSAPI_AUTH, packet.getRequestId(), sendBuffer.value, sendBuffer.length))) {
gss_release_buffer(&minStat, &sendBuffer);
return false;
}
gss_release_buffer(&minStat, &sendBuffer);
sentSignature = true;
}
else {
recvBuffer.length = packet.getLength();
recvBuffer.value = std::malloc(recvBuffer.length);
std::memcpy(recvBuffer.value, packet.getData(), recvBuffer.length);
majStat = gss_process_context_token(&minStat, gssContext, &recvBuffer);
std::free(recvBuffer.value);
if(majStat != GSS_S_COMPLETE)
return false;
setFinished();
}
return true;
}
};
}
}
}
#endif /* MAD_CORE_REQUESTHANDLER_GSSAPIAUTHREQUESTHANDLER_H_ */
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