public void Generate_ab()
{
byte[] bytes = new byte[KeySize / 8];
BigInteger _a = new BigInteger(bytes);
RandomNumberGenerator rng = RandomNumberGenerator.Create();
while (!_a.IsProbablePrime(KeySize) || _a >= P)
{
rng.GetBytes(bytes);
byte[] temp = new byte[bytes.Length + 1];
Array.Copy(bytes, temp, bytes.Length);
_a = new BigInteger(temp);
}
bytes = new byte[KeySize / 8];
BigInteger _b = new BigInteger(bytes);
while (!_b.IsProbablePrime(KeySize) || _b >= P)
{
rng.GetBytes(bytes);
byte[] temp = new byte[bytes.Length + 1];
Array.Copy(bytes, temp, bytes.Length);
_b = new BigInteger(temp);
}
a = _a;
b = _b;
}
public void GeneratePG()
{
byte[] bytes = new byte[KeySize / 8];
BigInteger p = new BigInteger(bytes);
RandomNumberGenerator rng = RandomNumberGenerator.Create();
while (!p.IsProbablePrime(KeySize))
{
rng.GetBytes(bytes);
byte[] temp = new byte[bytes.Length + 1];
Array.Copy(bytes, temp, bytes.Length);
p = new BigInteger(temp);
}
bytes = new byte[KeySize / 8];
BigInteger g = new BigInteger(bytes);
while (!g.IsProbablePrime(KeySize) || g >= p)
{
rng.GetBytes(bytes);
byte[] temp = new byte[bytes.Length + 1];
Array.Copy(bytes, temp, bytes.Length);
g = new BigInteger(temp);
}
P = p;
G = g;
}
public static BigInteger GenPrimeBigInteger(byte length)
{
RandomNumberGenerator rng = RandomNumberGenerator.Create();
byte[] bytes = new byte[length];
BigInteger a;
int i = 0;
do
{
i++;
rng.GetBytes(bytes);
a = new BigInteger(bytes);
} while (!a.IsProbablePrime(1));
return a;
}
public async Task<IHttpActionResult> GetRandomPrime()
{
var rnd = new System.Security.Cryptography.RNGCryptoServiceProvider();
var bytes = new byte[16];
var result = await Task.Run(() =>
{
rnd.GetNonZeroBytes(bytes);
var res = new BigInteger(bytes);
while (!res.IsProbablePrime(10))
{
rnd.GetNonZeroBytes(bytes);
res = new BigInteger(bytes);
}
return res;
});
Debug.WriteLine(result);
return Json(result.ToString());
}