public IResultOfEncryptionHash EncryptHashCode(BigInteger hash, WrappedInteger recipientOpenedKey)
{
var p = Subscriber.P;
var g = Subscriber.G;
var q = Subscriber.Q;
var x = Subscriber.ClosedKey;
var y = Subscriber.OpenedKey;
var k = PrimeNumberGenerator.GeneratePrimeNumber(1, (q - 1).ToInt32()); // 3;
//hash = 9;
var r = (g.ВСтепень(k) % p) % q;
var inverseK = (CryptoFormula.АлгоритмЕвклида(q, k, out var euErr) ?? throw new Exception(euErr));
var s = inverseK * (hash + ((x * r) % q)) % q;
var result = new DSAResultOfEncryptionHash(r, s, Subscriber.OpenedKey, hash)
{
P = Subscriber.P.Value,
Q = Subscriber.G.Value,
G = Subscriber.Q.Value,
K = k,
X = Subscriber.ClosedKey.Value,
};
return(result);
}
public void generateNewKeys(string keyName, string passphrase, int moduleSize)
{
BigInteger testValue = 0;
do
{
p = PrimeNumberGenerator.GeneratePrimeNumber(moduleSize / 2);
q = PrimeNumberGenerator.GeneratePrimeNumber(moduleSize / 2);
n = BigInteger.Multiply(p, q);
phi = BigInteger.Multiply(BigInteger.Subtract(p, 1), BigInteger.Subtract(q, 1));
e = PrimeNumberGenerator.GenerateMutuallyPrimeNumber(phi, moduleSize / 2);
d = PrimeNumberGenerator.MultiplicativelyInverseNumber(phi, e);
if (BigInteger.Compare(e, 0) < 0)
{
continue;
}
if (BigInteger.Compare(d, 0) < 0)
{
continue;
}
publicKey = new RSAPublicKey(e, n);
privateKey = new RSAPrivateKey(d, n);
privateKey.EncryptByPassphrase(passphrase);
testValue = privateKey.Decrypt(publicKey.Encrypt(TEST_VALUE));
} while (!BigInteger.Equals(testValue, TEST_VALUE));
_keyName = keyName;
}
public static (BigInteger P, BigInteger G) GenerateKeys(Random random)
{
PrimeNumberGenerator.PrimeRandom = random;
var p = PrimeNumberGenerator.GeneratePrimeNumber(100, 1000); // (1000000, int.MaxValue); //
var g = random.Next(2, p - 1);
return(p, g);
}
private void BtSetRandomSubscriberParams(object sender, EventArgs e)
{
CatchException(() =>
{
tbClosedKey.Text = PrimeNumberGenerator
.GeneratePrimeNumber(3, Convert.ToInt32(tbParamQ.Text) - 1, _random)
.ToString();
tbSubscriberName.Text = HelpfulMethods.GetRandomName(_random);
});
}
public IResultOfEncryptionHash EncryptHashCode(BigInteger hash, WrappedInteger recipientOpenedKey)
{
var p = Subscriber.P;
var g = Subscriber.G;
//var k = 9;
WrappedInteger k = PrimeNumberGenerator.GeneratePrimeNumber(1, (p - 2).ToInt32());
while (CryptoFormula.НайтиНОД(k, p - 1) != 1)
{
k = PrimeNumberGenerator.GeneratePrimeNumber(1, (p - 2).ToInt32());
}
k %= p - 1;
hash %= p - 1;
var a = g.ВСтепень(k) % p;
var b = (CryptoFormula.АлгоритмЕвклида(p - 1, k, out var euErr) ?? throw new Exception(euErr))
* ((p - 1) + (hash - ((Subscriber.ClosedKey * a) % (p - 1)))) % (p - 1);
return(new ElgamalResultOfEncryptionHash(a, b, Subscriber.OpenedKey, hash));
}
public static (BigInteger P, BigInteger Q, BigInteger G) GenerateParams(Random random)
{
PrimeNumberGenerator.PrimeRandom = random;
var p = PrimeNumberGenerator.GeneratePrimeNumber(100, 1000); // (1000000, int.MaxValue); //
var q = (p - 1).азложитьНаПростыеМножители().Max();
var h = random.Next(1, p - 2);
var getG = new Func <BigInteger>(() => { return(h.ВСтепень((p - 1) / q) % p); });
var g = getG();
while (g < 2)
{
p = PrimeNumberGenerator.GeneratePrimeNumber(100, 1000);
q = (p - 1).азложитьНаПростыеМножители().Max();
h = random.Next(1, p - 2);
g = getG();
}
return(p, q, g);
}
private void BtSetRandomSubscriberParams(object sender, EventArgs e)
{
tbClosedKey.Text = PrimeNumberGenerator.GeneratePrimeNumber(10, 100, _random).ToString();
tbSubscriberName.Text = HelpfulMethods.GetRandomName(_random);
}