public static byte[] generate_key_secret(byte[] my_private, byte[] another_public)
{
if (my_private == null || my_private.Length != DH_KEY_LENGTH)
{
return(null);
}
if (another_public == null || another_public.Length != DH_KEY_LENGTH)
{
return(null);
}
UInt128 private_k = new UInt128(my_private);
UInt128 another_k = new UInt128(another_public);
UInt128 secret_k = UInt128.PowModP(another_k, private_k);
byte[] secret_key = new byte[DH_KEY_LENGTH];
secret_k.ConvertToBytesArray(secret_key);
return(secret_key);
}
public static void generate_key_pair(byte[] public_key, byte[] private_key)
{
if (public_key == null || public_key.Length != DH_KEY_LENGTH)
{
return;
}
if (private_key == null || private_key.Length != DH_KEY_LENGTH)
{
return;
}
Random rand = new Random();
for (int i = 0; i < DH_KEY_LENGTH; i++)
{
private_key[i] = (byte)(rand.Next() & 0xFF);
}
UInt128 private_k = new UInt128(private_key);
UInt128 public_k = UInt128.PowModP(G, private_k);
public_k.ConvertToBytesArray(public_key);
}