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/*
* GSSAPIAuthRequest.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_COMMON_REQUEST_GSSAPIAUTHREQUEST_H_
#define MAD_COMMON_REQUEST_GSSAPIAUTHREQUEST_H_
#include "Request.h"
#include "../RequestManager.h"
#include <Net/Connection.h>
#include <Net/Packet.h>
#include <string>
#include <cstring>
#include <gssapi/gssapi.h>
#include <iostream>
namespace Mad {
namespace Common {
namespace Request {
// TODO Logging & error handling!
class GSSAPIAuthRequest : public Request {
private:
std::string serviceName;
gss_name_t gssServiceName;
gss_ctx_id_t gssContext;
bool gssContinue;
GSSAPIAuthRequest(const std::string &serviceName0) : serviceName(serviceName0), gssServiceName(GSS_C_NO_NAME), gssContext(GSS_C_NO_CONTEXT), gssContinue(true) {}
public:
virtual ~GSSAPIAuthRequest() {
OM_uint32 minStat;
if(gssServiceName != GSS_C_NO_NAME)
gss_release_name(&minStat, &gssServiceName);
}
static bool send(Net::Connection *connection, RequestManager &requestManager, const std::string &serviceName0) {
GSSAPIAuthRequest *request = new GSSAPIAuthRequest(serviceName0);
if(requestManager.sendRequest(connection, request))
return true;
delete request;
return false;
}
virtual bool sendRequest(Net::Connection *connection, unsigned short requestId) {
if(isSent())
return false;
OM_uint32 majStat, minStat;
gss_buffer_desc buffer;
buffer.length = serviceName.length();
buffer.value = std::malloc(buffer.length);
std::memcpy(buffer.value, serviceName.c_str(), buffer.length);
majStat = gss_import_name(&minStat, &buffer, GSS_C_NT_HOSTBASED_SERVICE, &gssServiceName);
std::free(buffer.value);
if(majStat != GSS_S_COMPLETE) {
gssServiceName = GSS_C_NO_NAME;
return false;
}
majStat = gss_init_sec_context(&minStat, GSS_C_NO_CREDENTIAL, &gssContext, gssServiceName, GSS_C_NO_OID, GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG,
0, GSS_C_NO_CHANNEL_BINDINGS, GSS_C_NO_BUFFER, 0, &buffer, 0, 0);
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, &buffer);
return false;
}
if(!connection->send(Net::Packet(Net::Packet::TYPE_GSSAPI_AUTH, requestId, buffer.value, buffer.length))) {
gss_release_buffer(&minStat, &buffer);
return false;
}
gss_release_buffer(&minStat, &buffer);
setSent();
return true;
}
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_init_sec_context(&minStat, GSS_C_NO_CREDENTIAL, &gssContext, gssServiceName, GSS_C_NO_OID, GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_INTEG_FLAG,
0, GSS_C_NO_CHANNEL_BINDINGS, &recvBuffer, 0, &sendBuffer, 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 {
recvBuffer.length = packet.getLength();
recvBuffer.value = std::malloc(recvBuffer.length);
std::memcpy(recvBuffer.value, packet.getData(), recvBuffer.length);
const gnutls_datum_t *cert = connection->getPeerCertificate();
sendBuffer.length = cert->size;
sendBuffer.value = cert->data;
majStat = gss_verify_mic(&minStat, gssContext, &sendBuffer, &recvBuffer, 0);
std::free(recvBuffer.value);
if(majStat != GSS_S_COMPLETE)
return false;
connection->setAuthenticated();
std::cout << "Authentication complete." << std::endl;
majStat = gss_delete_sec_context(&minStat, &gssContext, &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);
setFinished();
}
return true;
}
};
}
}
}
#endif /* MAD_COMMON_REQUEST_GSSAPIAUTHREQUEST_H_ */
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