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/*
* Dibbler - a portable DHCPv6
*
* author: Michal Kowalczuk <michal@kowalczuk.eu>
*
* released under GNU GPL v2 licence
*
* $Id: OptAuthentication.cpp,v 1.6 2008-06-18 23:22:14 thomson Exp $
*
* $Log: OptAuthentication.cpp,v $
* Revision 1.6 2008-06-18 23:22:14 thomson
* Cosmetic changes.
*
* Revision 1.5 2008-02-25 17:49:09 thomson
* Authentication added. Megapatch by Michal Kowalczuk.
* (small changes by Tomasz Mrugalski)
*
* Revision 1.4 2006-11-30 03:17:46 thomson
* Auth related changes by Sammael.
*
* Revision 1.3 2006-11-24 01:33:43 thomson
* *** empty log message ***
*
* Revision 1.2 2006-11-17 01:28:38 thomson
* Partial AUTH support by Sammael, fixes by thomson
*
* Revision 1.1 2006-11-17 00:37:16 thomson
* Partial AUTH support by Sammael, fixes by thomson
*
*
*
*/
#ifdef WIN32
#include <winsock2.h>
#endif
#ifdef LINUX
#include <netinet/in.h>
#endif
#include <stdlib.h>
#include "OptAuthentication.h"
#include "DHCPConst.h"
#include "Portable.h"
#include "Portable.h"
#include "Logger.h"
#include "Msg.h"
#include "Portable.h"
TOptAuthentication::TOptAuthentication( char * &buf, int &n, TMsg* parent)
:TOpt(OPTION_AUTH, parent)
{
AuthInfoLen = getDigestSize(parent->DigestType);
Valid=true;
if (n<13)
{
Valid=false;
buf+=n;
n=0;
return;
}
this->setRDM(*buf);
buf +=1; n -=1;
this->Parent->setReplayDetection(ntohll(*(uint64_t*)buf));
buf +=8; n -=8;
this->Parent->setSPI(ntohl(*(uint32_t*)buf));
buf +=4; n -=4;
if (n != AuthInfoLen)
{
Valid=false;
buf+=n;
n=0;
return;
}
this->Parent->setAuthInfoPtr(buf);
if (this->Parent->getType() != ADVERTISE_MSG)
this->Parent->setAuthInfoKey(this->Parent->AuthKeys->Get(this->Parent->getSPI()));
PrintHex("Received digest: ", buf, AuthInfoLen);
buf+=n; n = 0;
}
TOptAuthentication::TOptAuthentication(TMsg* parent)
:TOpt(OPTION_AUTH, parent)
{
AuthInfoLen = getDigestSize(parent->DigestType);
}
void TOptAuthentication::setRDM( uint8_t value)
{
RDM = value;
}
int TOptAuthentication::getSize()
{
return 17 + AuthInfoLen;
}
char * TOptAuthentication::storeSelf( char* buf)
{
AuthInfoLen = getDigestSize(this->Parent->DigestType);
uint32_t spi = this->Parent->getSPI();
uint32_t aaaspi = this->Parent->getAAASPI();
*(uint16_t*)buf = htons(OptType);
buf+=2;
*(uint16_t*)buf = htons(getSize() - 4);
buf+=2;
*buf = RDM;
buf+=1;
*(uint64_t*)buf = htonll(this->Parent->getReplayDetection());
buf+=8;
*(uint32_t*)buf = htonl(spi);
buf+=4;
memset(buf, 0, AuthInfoLen);
this->Parent->setAuthInfoPtr(buf);
this->Parent->setAuthInfoKey(this->Parent->AuthKeys->Get(spi));
// check if we should calculate the key
if (this->Parent->getAuthInfoKey() == NULL && this->Parent->getType() == REQUEST_MSG) {
this->Parent->setAuthInfoKey();
if (spi && aaaspi)
this->Parent->AuthKeys->Add(spi, aaaspi, this->Parent->getAuthInfoKey());
}
buf+=AuthInfoLen;
return buf;
}
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