/// <summary>
/// Generates secure random byte array of set length
/// </summary>
/// <param name="len">length of return byte array</param>
/// <returns>secure random byte array of set length</returns>
private static byte[] GenSecRandomBytes(int len)
{
var rand = new Org.BouncyCastle.Security.SecureRandom();
var bytes = new byte[len];
rand.NextBytes(bytes);
return(bytes);
}
public static byte[] AESGenerateIV(int vectorSize)
{
var ivBytes = new byte[vectorSize];
var secRandom = new Org.BouncyCastle.Security.SecureRandom();
secRandom.NextBytes(ivBytes);
return(ivBytes);
}
public static string FromPassword(string password)
{
if (password.Length > 20 || password.Length < 8)
{
return(JsonConvert.SerializeObject(""));
}
else
{
KeyPair keyPair = KeyPair.generateEd25519KeyPair();
PublicKey publicKey = keyPair.GetPublicKey();
byte[] salt = new byte[saltLength];
byte[] iv = new byte[ivLength];
Org.BouncyCastle.Security.SecureRandom random = new Org.BouncyCastle.Security.SecureRandom();
random.NextBytes(iv);
Org.BouncyCastle.Security.SecureRandom sr = new Org.BouncyCastle.Security.SecureRandom();
sr.NextBytes(salt);
Argon2Manager argon2Manager = Argon2Manager.Current;
byte[] derivedKey = argon2Manager.hash(System.Text.Encoding.ASCII.GetBytes(password), salt);
AesManager aes = AesManager.Current;
byte[] cipherPrivKey = aes.Encryptdata(keyPair.GetPrivateKey().getBytes(), derivedKey, iv);
Sha3Keccack sha3Keccack = Sha3Keccack.Current;
byte[] mac = sha3Keccack.CalculateHash(Utils.Combine(derivedKey, cipherPrivKey));
Crypto crypto = new Crypto(
AesManager.cipher, new string(cipherPrivKey.ToHex()),
new Cipherparams(
new string(iv.ToHex())
)
);
Kdfparams kdfparams = new Kdfparams(Argon2Manager.memoryCost, Argon2Manager.timeCost, Argon2Manager.parallelism, new string(salt.ToHex()));
Address address = new Address(publicKey);
Keystore ks = new Keystore(address.getAddress(), crypto, Utils.generateUUID(),
newVersion, new string(mac.ToHex()), argon2Manager.kdf(), kdfparams
);
return(JsonConvert.SerializeObject(ks));
}
}
public void GetBytes(byte[] output)
{
SecureRandomInstance.NextBytes(output);
}
/// <summary>
/// Generates secure random byte array of set length
/// </summary>
/// <param name="len">length of return byte array</param>
/// <returns>secure random byte array of set length</returns>
private static byte[] GenSecRandomBytes(int len)
{
var rand = new Org.BouncyCastle.Security.SecureRandom();
var bytes = new byte[len];
rand.NextBytes(bytes);
return bytes;
}
