public Alice()
{
P_G = DiffieHellman.GetTwoCryptoPrimes();
PrivateKey = DiffieHellman.PrivateKey(P_G.Item1);
PublicKey = DiffieHellman.PublicKey(P_G.Item1, P_G.Item2, PrivateKey);
//check if bob has supplied public key yet
}
public Bob(Tuple <BigInteger, BigInteger> primes, BigInteger publicKey)
{
P_G = primes;
PrivateKey = DiffieHellman.PrivateKey(P_G.Item1);
PublicKey = DiffieHellman.PublicKey(P_G.Item1, P_G.Item2, PrivateKey);
if (publicKey != null)
{
Key = DiffieHellman.Secret(P_G.Item1, publicKey, PrivateKey);
}
}
public CNG B(CNG c)
{
c.Alice.P_G = c.Bob.P_G = DiffieHellman.GetTwoCryptoPrimes();
c.Bob.PrivateKey = DiffieHellman.PrivateKey(c.Bob.P_G.Item1);
c.Bob.PublicKey = DiffieHellman.PublicKey(c.Bob.P_G.Item1, c.Bob.P_G.Item2, c.Bob.PrivateKey);
if (c.Alice.PublicKey != null)
{
c.Bob.Key = c.Alice.Key = DiffieHellman.Secret(c.Bob.P_G.Item1, c.Alice.PublicKey, c.Bob.PrivateKey);
}
return(c);
}
public CNG A(CNG c)
{
//alice creates a public and private key
c.Alice.P_G = c.Bob.P_G = DiffieHellman.GetTwoCryptoPrimes();
c.Alice.PrivateKey = DiffieHellman.PrivateKey(c.Alice.P_G.Item1);
c.Alice.PublicKey = DiffieHellman.PublicKey(c.Alice.P_G.Item1, c.Alice.P_G.Item2, c.Alice.PrivateKey);
//check if bob has supplied public key yet
if (c.Bob.PublicKey != null)
{
c.Bob.Key = c.Alice.Key = DiffieHellman.Secret(c.Alice.P_G.Item1, c.Bob.PublicKey, c.Alice.PrivateKey);
}
return(c);
}
public bool MakeKey(BigInteger publicKey)
{
try
{
PrivateKey = DiffieHellman.PrivateKey(P_G.Item1);
PublicKey = DiffieHellman.PublicKey(P_G.Item1, P_G.Item2, PrivateKey);
//check if bob has supplied public key yet
if (publicKey != null)
{
Key = DiffieHellman.Secret(P_G.Item1, publicKey, PrivateKey);
}
return(true);
}
catch (Exception)
{
return(false);
}
}