/// <summary>
/// Generates a request packet.
/// </summary>
/// <returns></returns>
public DiffieHellman GenerateRequest()
{
// Generate the parameters.
prime = BigInteger.genPseudoPrime(bits, 30, random);
mine = BigInteger.genPseudoPrime(bits, 30, random);
g = BigInteger.genPseudoPrime(bits, 30, random);
// Gemerate the string.
PayloadWriter pw = new PayloadWriter();
pw.WriteBigInteger(prime);
pw.WriteBigInteger(g);
// Generate the send BigInt.
using (BigInteger send = g.modPow(mine, prime))
{
pw.WriteBigInteger(send);
}
representation = pw.ToByteArray();
return(this);
}
/// <summary>
/// Generate a response packet.
/// </summary>
/// <param name="request">The string representation of the request.</param>
/// <returns></returns>
public DiffieHellman GenerateResponse(PayloadReader pr)
{
// Generate the would-be fields.
using (BigInteger prime = pr.ReadBigInteger())
using (BigInteger g = pr.ReadBigInteger())
using (BigInteger mine = BigInteger.genPseudoPrime(bits, 30, random))
{
// Generate the key.
using (BigInteger given = pr.ReadBigInteger())
using (BigInteger key = given.modPow(mine, prime))
{
this.key = key.getBytes();
}
// Generate the response.
using (BigInteger send = g.modPow(mine, prime))
{
PayloadWriter pw = new PayloadWriter();
pw.WriteBigInteger(send);
this.representation = pw.ToByteArray();
}
}
return(this);
}