Authentication using HMAC

Authentication using HMAC

#include<conio.h>

#include<stdio.h>

#include<iostream.h>

#include<stdlib.h>

#include<dos.h>

void main()

{

 clrscr();

 int hmac,a=65,b=66,ra,rb,kab;

 ra=random(10)+1;

 kab=random(10)+1;

cout<<"A generated random number "<<ra<<"\n";

 cout<<"Shared secret key for session is "<<kab<<"\n";

 cout<<"Identity of A is 65 and for B its 66\n";

 rb=random(10)+1;

 cout<<"B generate random number "<<rb<<"\n";

 //calculate hmac(simple add of all keys and rand no's)

 hmac=ra+rb+a+b+kab;

 cout<<"Hash function value by B is "<<hmac<<"\n";

 cout<<"A verifies,......\n";

 delay(3000);

 cout<<"B authnticatd\n";

 hmac=ra+rb+kab;

cout<<"A send hmac on ra,rb,kab "<<hmac<<"\n";

 cout<<"B verifies,......\n";

 delay(3000);

 cout<<"A authnticatd\n";

 getch();

}

OUTPUT:

A generated random number 1

Shared secret key for session is 1

Identity of A is 65 and for B its 66

B generate random number 4

Hash function value by B is 137

A verifies,......

B authnticatd

A send hmac on ra,rb,kab 6

B verifies,......

A authnticatd