private Result PersistKey(Address address, KeyStoreItem keyData)
{
var serializedKey = _jsonSerializer.Serialize(keyData);
try
{
// "UTC--2018-12-30T14-04-11.699600594Z--1a959a04db22b9f4360db07125f690449fa97a83"
DateTime utcNow = DateTime.UtcNow;
string keyFileName = $"UTC--{utcNow:yyyy-MM-dd}T{utcNow:HH-mm-ss.ffffff}000Z--{address.ToString(false, false)}";
var path = Path.Combine(GetStoreDirectory(), keyFileName);
File.WriteAllText(path, serializedKey, _keyStoreEncoding);
return(new Result {
ResultType = ResultType.Success
});
}
catch (Exception e)
{
var msg = $"Error during persisting key for address: {address}";
if (_logger.IsError)
{
_logger.Error(msg, e);
}
return(Result.Fail(msg));
}
}
public Result StoreKey(PrivateKey key, SecureString password)
{
var salt = _cryptoRandom.GenerateRandomBytes(32);
var passBytes = password.ToByteArray(_keyStoreEncoding);
var derivedKey = SCrypt.ComputeDerivedKey(passBytes, salt, _config.KdfparamsN, _config.KdfparamsR, _config.KdfparamsP, null, _config.KdfparamsDklen);
var encryptKey = Keccak.Compute(derivedKey.Take(16).ToArray()).Bytes.Take(16).ToArray();
var encryptContent = key.KeyBytes;
var iv = _cryptoRandom.GenerateRandomBytes(_config.IVSize);
var cipher = _symmetricEncrypter.Encrypt(encryptContent, encryptKey, iv, _config.Cipher);
if (cipher == null)
{
return(Result.Fail("Error during encryption"));
}
var mac = Keccak.Compute(derivedKey.Skip(_config.KdfparamsDklen - 16).Take(16).Concat(cipher).ToArray()).Bytes;
var address = key.Address.ToString();
var keyStoreItem = new KeyStoreItem
{
Address = address,
Crypto = new Crypto
{
Cipher = _config.Cipher,
CipherText = cipher.ToHexString(true),
CipherParams = new CipherParams
{
IV = iv.ToHexString(true)
},
KDF = _config.Kdf,
KDFParams = new KdfParams
{
DkLen = _config.KdfparamsDklen,
N = _config.KdfparamsN,
P = _config.KdfparamsP,
R = _config.KdfparamsR,
Salt = salt.ToHexString(true)
},
MAC = mac.ToHexString(true),
Version = CryptoVersion
},
Id = address,
Version = Version
};
var serializedKey = _jsonSerializer.Serialize(keyStoreItem);
if (serializedKey == null)
{
return(Result.Fail("Error during key serialization"));
}
return(PersistKey(address, serializedKey));
}
public Result StoreKey(PrivateKey key, SecureString password)
{
if (!password.IsReadOnly())
{
throw new InvalidOperationException("Cannot work with password that is not readonly");
}
var salt = _cryptoRandom.GenerateRandomBytes(32);
var passBytes = password.ToByteArray(_keyStoreEncoding);
var derivedKey = SCrypt.ComputeDerivedKey(passBytes, salt, _config.KdfparamsN, _config.KdfparamsR, _config.KdfparamsP, null, _config.KdfparamsDklen);
var encryptKey = Keccak.Compute(derivedKey.Take(16).ToArray()).Bytes.Take(16).ToArray();
var encryptContent = key.KeyBytes;
var iv = _cryptoRandom.GenerateRandomBytes(_config.IVSize);
var cipher = _symmetricEncrypter.Encrypt(encryptContent, encryptKey, iv, _config.Cipher);
if (cipher == null)
{
return(Result.Fail("Error during encryption"));
}
var mac = Keccak.Compute(derivedKey.Skip(_config.KdfparamsDklen - 16).Take(16).Concat(cipher).ToArray()).Bytes;
string addressString = key.Address.ToString(false, false);
var keyStoreItem = new KeyStoreItem
{
Address = addressString,
Crypto = new Crypto
{
Cipher = _config.Cipher,
CipherText = cipher.ToHexString(false),
CipherParams = new CipherParams
{
IV = iv.ToHexString(false)
},
KDF = _config.Kdf,
KDFParams = new KdfParams
{
DkLen = _config.KdfparamsDklen,
N = _config.KdfparamsN,
P = _config.KdfparamsP,
R = _config.KdfparamsR,
Salt = salt.ToHexString(false)
},
MAC = mac.ToHexString(false),
},
Id = addressString,
Version = Version
};
return(StoreKey(key.Address, keyStoreItem));
}
public (KeyStoreItem KeyData, Result Result) Verify(string keyJson)
{
try
{
KeyStoreItem keyData = _jsonSerializer.Deserialize <KeyStoreItem>(keyJson);
return(keyData, Result.Success);
}
catch (Exception)
{
return(null, Result.Fail("Invalid key data format"));
}
}
private Result Validate(KeyStoreItem keyStoreItem)
{
if (keyStoreItem.Crypto?.CipherParams == null || keyStoreItem.Crypto.KDFParams == null)
{
return(Result.Fail("Incorrect key"));
}
if (keyStoreItem.Version != Version)
{
return(Result.Fail("KeyStore version mismatch"));
}
return(Result.Success);
}
private Result PersistKey(Address address, KeyStoreItem keyData)
{
var serializedKey = _jsonSerializer.Serialize(keyData);
try
{
var keyFileName = _keyStoreIOSettingsProvider.GetFileName(address);
var storeDirectory = _keyStoreIOSettingsProvider.StoreDirectory;
var path = Path.Combine(storeDirectory, keyFileName);
File.WriteAllText(path, serializedKey, _keyStoreEncoding);
return(new Result {
ResultType = ResultType.Success
});
}
catch (Exception e)
{
var msg = $"Error during persisting key for address: {address}";
if (_logger.IsError)
{
_logger.Error(msg, e);
}
return(Result.Fail(msg));
}
}
public Result StoreKey(Address address, KeyStoreItem keyStoreItem)
{
return(PersistKey(address, keyStoreItem));
}
public Result StoreKey(Address address, KeyStoreItem keyStoreItem)
{
throw new System.NotImplementedException();
}
