//constructor
public Rand()
{
int length = (int)(rand.NextDouble() * 2.0d + 1.0d);
for (int i = 0; i < length; i++)
{
generator.AddSeedMaterial(seed.GenerateSeed(128, false));
}
}
public static AsymmetricCipherKeyPair GetRSAKeyPairFromSeed(string rsaSeed, int rsaKeySize = 4096, CoinType coinType = CoinType.Stratis)
{
byte[] binaryRsaSeed = System.Text.Encoding.ASCII.GetBytes(rsaSeed);
// apply SHAKE-256
var digest = new Org.BouncyCastle.Crypto.Digests.SkeinDigest(256, 4096);
int digestSize = digest.GetDigestSize();
digest.BlockUpdate(binaryRsaSeed, 0, binaryRsaSeed.Length);
byte[] rsaSeedDigest = new byte[4096 / 8];
digest.DoFinal(rsaSeedDigest, 0);
var randomSeedGenerator = System.Security.Cryptography.RandomNumberGenerator.Create();
byte[] seed = new byte[rsaKeySize / 8];
randomSeedGenerator.GetBytes(seed);
VmpcRandomGenerator randomGenerator = new VmpcRandomGenerator();
randomGenerator.AddSeedMaterial(seed);
//CryptoApiRandomGenerator randomGenerator = new CryptoApiRandomGenerator();
var secureRandom = new SecureRandom(randomGenerator);
var keyGenerationParameters = new KeyGenerationParameters(secureRandom, rsaKeySize);
var privateKeyBasedRsaKeyPairGenerator = new SeedBasedDeterministicRsaKeyPairGenerator();
privateKeyBasedRsaKeyPairGenerator.Init(keyGenerationParameters, rsaSeedDigest);
var result = privateKeyBasedRsaKeyPairGenerator.GenerateKeyPair();
return(result);
}
private static SecureRandom GetSeededSecureRandom()
{
var buffer = new byte[32];
using (var cryptoRandom = RandomNumberGenerator.Create())
{
cryptoRandom.GetBytes(buffer);
}
var randomGenerator = new VmpcRandomGenerator();
randomGenerator.AddSeedMaterial(buffer);
SecureRandom random = new SecureRandom(randomGenerator);
return(random);
}
