public static string keystoreToPubkey(string ksJson, string password)
{
Keystore ks = (Keystore)JsonConvert.DeserializeObject(ksJson);
string privateKey = ObtainPrikey(ks, password);
return(KeystoreUtils.PrivatekeyToPublicKey(privateKey));
}
public static bool verifyPassword(Keystore keystore, string password)
{
byte[] derivedKey = Argon2Manager.Current.hash(System.Text.Encoding.ASCII.GetBytes(password), keystore.kdfparams.salt.HexToByteArray());
byte[] cipherPriKey = keystore.crypto.ciphertext.HexToByteArray();
Sha3Keccack sha3Keccack = Sha3Keccack.Current;
byte[] mac = sha3Keccack.CalculateHash(Utils.Combine(derivedKey, cipherPriKey));
return(mac.ToHex().Equals(keystore.mac));
}
public static string ObtainPrikey(Keystore ks, string password)
{
if (!verifyPassword(ks, password))
{
return("invalid password");
}
byte[] derivedKey = Argon2Manager.Current.hash(System.Text.Encoding.ASCII.GetBytes(password), ks.kdfparams.salt.HexToByteArray());
byte[] iv = ks.crypto.cipherparams.iv.HexToByteArray();
return(AesManager.Current.Decryptdata(derivedKey, ks.crypto.ciphertext.HexToByteArray(), iv).ToHex());
}
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 static string keystoreToAddress(string ksJson)
{
Keystore ks = (Keystore)JsonConvert.DeserializeObject(ksJson);
return(ks.address);
}
