public void sigcheck(messC3 m, BigInteger n)
{
List<int> pozver = new List<int>();
for(int i=0;i<alist.Count();i++)
if (alist[i].getQ() == m.getQ())
{
if (rsa.verifySig(m.getQ(), m.getQu(), alist[i].getV(), n) == true)
{
pozver.Add(i);
Console.WriteLine("VALID SIGNATURE FOR {0} !", alist[i].getA());
}
else
{
Console.WriteLine("BAD ACCESS ATTEMPT FOR {0} !", alist[i].getA());
balist[alist[i].getA()]++;
int x = balist[alist[i].getA()];
if (x > 2)
Console.WriteLine("TOO MANY BAD ATTEMPTS FOR {0} ! CLIENT BLOCKED !", alist[i].getA());
}
}
for (int i = 0; i < pozver.Count; i++)
alist.RemoveAt(pozver[i]);
}
private void sendconfirmFake(cserver cs, messC3 m, BigInteger n)
{
m = new messC3(m.getQ(), m.getQu() + 1);
cs.sigcheck(m, n);
}
private void sendconfirm(cserver cs, messC3 m,BigInteger n)
{
cs.sigcheck(m,n);
}
public void retreive(String pass, bool legal)
{
BigInteger gp = gengp(pass);
BigInteger x= genx();
BigInteger Q= genQ(x,gp);
List<messS1> rec = new List<messS1>();
int n = slist.Length;
for (int i = 0; i < n; i++)
{
messC2 m = new messC2(name, Q);
messS1 reply=sendrequest(slist[i], m);
if (reply == null)
{
Console.WriteLine("\n{0}: Abort !\n", name);
return;
}
else
rec.Add(reply);
}
BigInteger Kmrec= genKrec(x,rec);
BigInteger proof = rec[0].getproof();
byte[] Ukrec= rec[0].getUk();
if (verify(gp,Kmrec,proof) == true)
{
Console.WriteLine("\n{0}: Km retreived successfuly !\n",name);
BigInteger U= decryptU(Kmrec,Ukrec);
BigInteger Qu=new BigInteger(rsa.createSig(Q, U, nrsa));
messC3 mc = new messC3(Q, Qu);
for (int i = 0; i < slist.Length; i++)
if (legal == true)
sendconfirm(slist[i], mc, nrsa);
else
sendconfirmFake(slist[i], mc, nrsa);
}
else
Console.WriteLine("\n{0}: Abort !\n",name);
}
