/// <summary>
/// Creates provider for specified eliptic curve technology.
/// </summary>
/// <param name="curve"></param>
public ECProvider(ElipticCurve curve)
{
this.curve = curve;
calculator = new PointCalculator(curve);
serialiser = new PointSerialiser(curve);
rnd = new RandomBigNumbers();
}
private static void runTest()
{
int iterations = 10;
DiffieHelmanTest dht = new DiffieHelmanTest();
dht.TestDiffieHelman(ElipticCurve.secp521r1(), iterations);
dht.TestDiffieHelman(ElipticCurve.Secp112r1(), iterations);
dht.TestDiffieHelman(ElipticCurve.secp160r1(), iterations);
dht.TestDiffieHelman(ElipticCurve.secp192r1(), iterations);
dht.TestDiffieHelman(ElipticCurve.secp256r1(), iterations);
dht.TestDiffieHelman(ElipticCurve.TestCurve(), iterations);
CryptographyTests ct = new CryptographyTests();
ct.TestEncryption(ElipticCurve.secp521r1(), iterations, Encoding.UTF32);
ct.TestEncryption(ElipticCurve.secp521r1(), iterations, Encoding.Unicode);
ct.TestEncryption(ElipticCurve.Secp112r1(), iterations, Encoding.Unicode);
ct.TestEncryption(ElipticCurve.secp160r1(), iterations, Encoding.UTF32);
ct.TestEncryption(ElipticCurve.secp192r1(), iterations, Encoding.UTF32);
ct.TestEncryption(ElipticCurve.secp256r1(), iterations, Encoding.Unicode);
DigitalSignatureTests st = new DigitalSignatureTests();
st.TestSignature(ElipticCurve.secp521r1(), iterations);
st.TestSignature(ElipticCurve.Secp112r1(), iterations);
st.TestSignature(ElipticCurve.secp160r1(), iterations);
st.TestSignature(ElipticCurve.secp192r1(), iterations);
st.TestSignature(ElipticCurve.secp256r1(), iterations);
st.TestSignature(ElipticCurve.TestCurve(), iterations);
}
public void TestDiffieHelman(ElipticCurve curve, int iterations)
{
ECKeysGenerator keyGen = new ECKeysGenerator(curve);
ECDiffieHelman diffie = new ECDiffieHelman(curve);
//generovanie klucoveho paru
byte[] privateKeyAlice;
byte[] publicKeyAlice;
byte[] privateKeyBob;
byte[] publicKeyBob;
for (int i = 0; i < iterations; i++)
{
Console.WriteLine($"diffie-helman curve {curve.Name} test {i}... ");
keyGen.GenerateKeyPair(out privateKeyAlice, out publicKeyAlice);
keyGen.GenerateKeyPair(out privateKeyBob, out publicKeyBob);
string commnonAlices = Convert.ToBase64String(diffie.SharedSecret(privateKeyAlice, publicKeyBob));
string commnonBobs = Convert.ToBase64String(diffie.SharedSecret(privateKeyBob, publicKeyAlice));
Console.WriteLine(commnonAlices);
if (commnonAlices != commnonBobs)
{
throw new Exception("Fatal Error");
}
Write("OK", ConsoleColor.Green);
}
}
private static void generateKeys()
{
generateKey(ElipticCurve.Secp112r1());
generateKey(ElipticCurve.secp160r1());
generateKey(ElipticCurve.secp192r1());
generateKey(ElipticCurve.secp256r1());
generateKey(ElipticCurve.secp521r1());
generateKey(ElipticCurve.TestCurve());
}
/// <summary>
/// initialise updater.
/// </summary>
/// <param name="updateDir"></param>
public UpdateController(string updateDir, TroubleShooterClient client)
{
this._client = client;
_updateDir = updateDir;
ElipticCurve curve = ElipticCurve.secp160r1();
_keyGen = new ECKeysGenerator(curve);
_verifier = new ECSignature(curve);
_diffieHelman = new ECDiffieHelman(curve);
}
private static void generateKey(ElipticCurve curve)
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine(curve.Name);
Console.ResetColor();
byte[] privateKey;
byte[] publicKey;
new ECKeysGenerator(curve).GenerateKeyPair(out privateKey, out publicKey);
Console.WriteLine($"private:{Convert.ToBase64String(privateKey)}");
Console.WriteLine($"public :{Convert.ToBase64String(publicKey)}");
}
/// <summary>
/// <see cref="TroubleshooterController"/>
/// </summary>
public TroubleshooterController(ServisContext ctx)
{
this.ctx = ctx;
ElipticCurve curve = ElipticCurve.secp160r1();
signatureMaker = new ECSignature(curve);
keyGen = new ECKeysGenerator(curve);
diffieHelman = new ECDiffieHelman(curve);
sourceFiles = SourceFileInfoBuilder.GetSourceFiles(SOURCE_FILES_DIR);
rnd = new Random();
}
public void TestSignature(ElipticCurve curve, int iterations)
{
ECKeysGenerator keyGen = new ECKeysGenerator(curve);
ECSignature signature = new ECSignature(curve);
for (int i = 0; i < iterations; i++)
{
Console.WriteLine($"signature curve {curve.Name} test {i}... ");
//generovanie klucoveho paru
byte[] privateKey1;
byte[] publicKey1;
keyGen.GenerateKeyPair(out privateKey1, out publicKey1);
byte[] privateKey2;
byte[] publicKey2;
keyGen.GenerateKeyPair(out privateKey2, out publicKey2);
string str1 = RandomString(random.Next(100));
string str2 = RandomString(random.Next(100));
while (str1 == str2)
{
str2 = RandomString(random.Next(100));
}
byte[] sign1 = signature.Signature(str1, privateKey1);
byte[] sign2 = signature.Signature(str2, privateKey1);
Console.WriteLine(Convert.ToBase64String(sign1));
if (!signature.VerifySignature(str1, sign1, publicKey1))
{
Write($"Signature should be valid !!! ", ConsoleColor.Red);
throw new Exception("Fatal error");
}
if (signature.VerifySignature(str1, sign1, publicKey2))
{
Write($"Signature should not be valid because of wrong public key !!!", ConsoleColor.DarkYellow);
}
if (signature.VerifySignature(str2, sign1, publicKey1))
{
Console.WriteLine();
Write($"Signature should not be valid because of changed message!!!", ConsoleColor.DarkYellow);
}
else
{
Write("OK", ConsoleColor.Green);
}
}
}
public void GenerateCurveAndPointCheck()
{
ElipticCurve curve = new ElipticCurve(64);
curve.GenerateRandomCurve();
Point p1 = curve.GenerateRandomPointOnCurve();
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(p1));
Point p2 = curve.GenerateRandomPointOnCurve();
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(p1));
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(p1 + p1));
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(p1 + p2));
}
public void ScalarMultiplicationTests()
{
ElipticCurve curve = new ElipticCurve(64);
curve.GenerateRandomCurve();
Point randomPoint = curve.GenerateRandomPointOnCurve();
Point testPoint = curve.ScalarMultiplication(randomPoint, 1);
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(testPoint));
testPoint = curve.ScalarMultiplication(randomPoint, 5);
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(testPoint));
testPoint = curve.ScalarMultiplication(randomPoint, 100);
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(testPoint));
testPoint = curve.ScalarMultiplication(randomPoint, BigInteger.Parse("999999999999999999999999999999999999999999999999999999999999"));
Assert.IsTrue(curve.CheckIfPointBelongsToCurve(testPoint));
}
public void TestEncryption(ElipticCurve curve, int iterations, Encoding enc)
{
ECKeysGenerator keyGen = new ECKeysGenerator(curve);
ECEncryption crypto = new ECEncryption(curve);
//generovanie klucoveho paru
byte[] privateKey;
byte[] publicKey;
for (int i = 0; i < iterations; i++)
{
Console.WriteLine($"encrtyption curve {curve.Name} test {i}... ");
keyGen.GenerateKeyPair(out privateKey, out publicKey);
string test = RandomString(random.Next(100));
byte[] cipher = crypto.Encrypt(test, publicKey, enc);
Console.WriteLine(Convert.ToBase64String(cipher));
string decoded = crypto.Decrypt(cipher, privateKey, enc);
if (test != decoded)
{
throw new Exception("Fatal Error");
}
Write("OK", ConsoleColor.Green);
}
}
public void CheckIfStaticPointsBelongsToCurve()
{
BigInteger a = 6;
BigInteger p = 11;
ElipticCurve curve = new ElipticCurve(a, 4, p);
Point p1 = new Point(7, 9, a, p);
Point p2 = new Point(3, 4, a, p);
bool result = curve.CheckIfPointBelongsToCurve(p1);
Assert.IsTrue(result);
result = curve.CheckIfPointBelongsToCurve(p2);
Assert.IsTrue(result);
result = curve.CheckIfPointBelongsToCurve(p1 + p1);
Assert.IsTrue(result);
result = curve.CheckIfPointBelongsToCurve(p1 + p2);
Assert.IsTrue(result);
result = curve.CheckIfPointBelongsToCurve(Point.NeutralElement(a, p));
Assert.IsTrue(result);
}