CODEWITHSUNDEEP
c++omnet++inet
Shaikha TheGreen
Shaikha TheGreen

Reputation: 115

How to implement a replay attack using AODV protocol in omnet++?

I need a snippet of c++ code that simulate AODV network with a malicious node that does a replay attack. I need to embed this in my OMNet++ project.

I tried to change the original code in the sample project in OMNet++ but I'm back at the starting point.

It'll be great to find help.

I can't include a sample code it's fairly long in characters, if you need to see my trials until now, show me where can I share my project.

Upvotes: 0

Views: 672

Answers (1)

user4786271
user4786271

Reputation: 1565

Since the OPs question lacks some details, I will provide a mock solution following Wikipedia article's example for the Replay attack:

Suppose Alice wants to prove her identity to Bob. Bob requests her password as proof of identity, which Alice dutifully provides (possibly after some transformation like a hash function); meanwhile, Eve is eavesdropping on the conversation and keeps the password (or the hash). After the interchange is over, Eve (posing as Alice) connects to Bob; when asked for a proof of identity, Eve sends Alice's password (or hash) read from the last session, which Bob accepts thus granting access to Eve.

I would create a new packet (extending the UDPPacket) to serve your specific application goal, by adding source and destination fields to the UDPPacket:

cplusplus {{                
#include "<directory_path_for_the_udp_packet_goes_here>/UDPPacket_m.h"      // inheriting the parent class

}}

class ExtendedUDPPacket;    // you can call it whatever you want

message ExtendedUDPPacket extends UDPPacket 
{
    string sourceNode;          // name of the sender
    string destinationNode;         // name of the receiver
}

Now let's look at the 3 different roles in the given example:

  1. Alice: needs to authenticate
  2. Bob: authenticator
  3. Eve: eavesdropper

If we consider that each node has a specific ID which holds its name we can do the following for each role:

ALICE:

void MalAODVRouter::handleMessage(cMessage *msg)
{
    ExtendedUDPPacket *eUDPmsg = dynamic_cast<UDPPacket *>(msg);
    if (this->myID == eUDPmsg->getDestinationNode())      // myID is "Alice"
    {
        ExtendedUDPPacket *ExtendedUDPPacket= new UDPPacket();
        ExtendedUDPPacket->setSourceAddress(myID.c_str());
        ExtendedUDPPacket->setDestinationAddress(std::string("Bob").c_str());

        send(udpPacket, "ipOut");
    }
}

EVE:

void MalAODVRouter::handleMessage(cMessage *msg)
{
    ExtendedUDPPacket *eUDPmsg = dynamic_cast<UDPPacket *>(msg);
    if (this->myID != eUDPmsg->getDestinationNode())      // myID is "Eve"
    {
        ExtendedUDPPacket *ExtendedUDPPacket= new UDPPacket();
        ExtendedUDPPacket->setSourceAddress(std::string("Alice").c_str());  // fake the message
        ExtendedUDPPacket->setDestinationAddress(std::string("Bob").c_str());

        send(udpPacket, "ipOut");
    }
}

BOB:

void MalAODVRouter::handleMessage(cMessage *msg)
{
    ExtendedUDPPacket *eUDPmsg = dynamic_cast<UDPPacket *>(msg);
    if (eUDPmsg->getSourceNode() == 'Alice')   
    {
        ExtendedUDPPacket *ExtendedUDPPacket= new UDPPacket();
        ExtendedUDPPacket->setSourceAddress(std::string("Bob").c_str());
        ExtendedUDPPacket->setDestinationAddress(std::string("Alice").c_str());


        send(udpPacket, "ipOut");
    }
}

Bear in mind this is a mock implementation, you can add smarter conditional checks to make the application behave better.

Upvotes: 1

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