public void TestMethod1()
{
Elgamal elgamal = new Elgamal();
NumberGenerator ng = new NumberGenerator();
ElgamalDecryptor decryptor = new ElgamalDecryptor();
int[] one = { 1 };
elgamal.P = NumberConverter.IntToBits(547);
elgamal.G = NumberConverter.IntToBits(9);
elgamal.A = NumberConverter.IntToBits(23);
elgamal.M = NumberConverter.IntToBits(100);
elgamal.K = NumberConverter.IntToBits(125);
elgamal.B = elgamal.GenerateB();
Assert.AreEqual("81", NumberConverter.BitsArraystoString(elgamal.B).ToString());
elgamal.Kprim = elgamal.GenerateKprim();
Assert.AreEqual("83", NumberConverter.BitsArraystoString(elgamal.Kprim).ToString());
elgamal.R = elgamal.GenerateR();
Assert.AreEqual("304", NumberConverter.BitsArraystoString(elgamal.R).ToString());
elgamal.S = ng.GetS(elgamal.Kprim, elgamal.M, elgamal.A, elgamal.R, MathOperations.BitsSubstraction(elgamal.P, one));
Assert.AreEqual("172", NumberConverter.BitsArraystoString(elgamal.S).ToString());
Assert.AreEqual("81", NumberConverter.BitsArraystoString(decryptor.GetX2(elgamal)).ToString());
Assert.AreEqual("304", NumberConverter.BitsArraystoString(decryptor.GetBR(elgamal)).ToString());
Assert.AreEqual("182", NumberConverter.BitsArraystoString(decryptor.GetRS(elgamal)).ToString());
Assert.AreEqual("81", NumberConverter.BitsArraystoString(decryptor.GetX1(elgamal, decryptor.GetBR(elgamal), decryptor.GetRS(elgamal))).ToString());
Assert.AreEqual(true, decryptor.IsCorrect(elgamal));
}
public void Substract()
{
Assert.AreEqual(2, NumberConverter.BitsToInt(MathOperations.BitsSubstraction(NumberConverter.IntToBits(32), NumberConverter.IntToBits(30))));
Assert.AreEqual(20, NumberConverter.BitsToInt(MathOperations.BitsSubstraction(NumberConverter.IntToBits(84), NumberConverter.IntToBits(64))));
Assert.AreEqual(200, NumberConverter.BitsToInt(MathOperations.BitsSubstraction(NumberConverter.IntToBits(876), NumberConverter.IntToBits(676))));
Assert.AreEqual(123, NumberConverter.BitsToInt(MathOperations.BitsSubstraction(NumberConverter.IntToBits(723), NumberConverter.IntToBits(600))));
Assert.AreEqual(8756, NumberConverter.BitsToInt(MathOperations.BitsSubstraction(NumberConverter.IntToBits(100000), NumberConverter.IntToBits(91244))));
}
public void GeneratePublicKeys()
{
int[] one = { 1 };
P = ng.GetP(1024);
A = ng.GetRandomNumberSmallerThan(MathOperations.BitsSubstraction(P, one));
G = ng.GetCoprimeInteger(P);
B = GenerateB();
}
public void GeneratePrivateKeys(int[] message)
{
int[] one = { 1 };
M = message;
K = ng.GetCoprimeInteger(P);
R = GenerateR();
Kprim = GenerateKprim();
S = ng.GetS(Kprim, M, A, R, MathOperations.BitsSubstraction(P, one));
ElgamalDecryptor dec = new ElgamalDecryptor();
}
public int[] GenerateKprim()
{
int[] one = { 1 };
return(MathOperations.InversePow(K, MathOperations.BitsSubstraction(P, one)));
}