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/*
* GSSAPIAuthRequest.cpp
*
* 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/>.
*/
#include "GSSAPIAuthRequest.h"
#include "../Logger.h"
#include "../XmlPacket.h"
#include <Net/Connection.h>
#include <cstring>
namespace Mad {
namespace Common {
namespace Requests {
// TODO Logging & error handling!
GSSAPIAuthRequest::~GSSAPIAuthRequest() {
OM_uint32 minStat;
if(gssServiceName != GSS_C_NO_NAME)
gss_release_name(&minStat, &gssServiceName);
}
void GSSAPIAuthRequest::sendRequest(Net::Connection *connection, uint16_t requestId) {
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;
}
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) {
Logger::log(Logger::VERBOSE, "GSS context established.");
gssContinue = false;
}
else if(majStat != GSS_S_CONTINUE_NEEDED) {
gss_release_buffer(&minStat, &buffer);
return;
}
XmlPacket ret;
ret.setType("AuthGSSAPI");
ret.addBinary("authToken", buffer.value, buffer.length);
if(!connection->send(ret.encode(requestId))) {
gss_release_buffer(&minStat, &buffer);
return;
}
gss_release_buffer(&minStat, &buffer);
}
void GSSAPIAuthRequest::handlePacket(Net::Connection *connection, uint16_t requestId, const XmlPacket &packet) {
if(packet.getType() != "AuthGSSAPI") {
finishWithError(Exception(Exception::UNEXPECTED_PACKET));
return; // TODO Logging
}
OM_uint32 majStat, minStat;
gss_buffer_desc recvBuffer, sendBuffer;
// Needs error handling!
if(gssContinue) {
const void *pkgData;
packet["authToken"].getBinaryData(&pkgData, &recvBuffer.length);
recvBuffer.value = std::malloc(recvBuffer.length);
std::memcpy(recvBuffer.value, pkgData, 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) {
Logger::log(Logger::VERBOSE, "GSS context established.");
gssContinue = false;
}
else if(majStat != GSS_S_CONTINUE_NEEDED) {
gss_release_buffer(&minStat, &sendBuffer);
return;
}
XmlPacket ret;
ret.setType("AuthGSSAPI");
ret.addBinary("authToken", sendBuffer.value, sendBuffer.length);
if(!connection->send(ret.encode(requestId))) {
gss_release_buffer(&minStat, &sendBuffer);
return;
}
gss_release_buffer(&minStat, &sendBuffer);
}
else {
const void *pkgData;
packet["certMic"].getBinaryData(&pkgData, &recvBuffer.length);
recvBuffer.value = std::malloc(recvBuffer.length);
std::memcpy(recvBuffer.value, pkgData, 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;
connection->setAuthenticated();
Logger::log(Logger::VERBOSE, "Authentication complete.");
majStat = gss_delete_sec_context(&minStat, &gssContext, &sendBuffer);
if(majStat != GSS_S_COMPLETE) {
gss_release_buffer(&minStat, &sendBuffer);
return;
}
XmlPacket ret;
ret.setType("AuthGSSAPI");
ret.addBinary("authToken", sendBuffer.value, sendBuffer.length);
if(!connection->send(ret.encode(requestId))) {
gss_release_buffer(&minStat, &sendBuffer);
return;
}
gss_release_buffer(&minStat, &sendBuffer);
finish(XmlPacket());
}
}
}
}
}
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