public AccountDescriptor Authenticate(ulong accountId, string password)
{
Account account = _dataAccessService.GetAccount(accountId);
if (account == null)
{
throw new AccountNotFoundException(accountId);
}
AccountDescriptor accountDescriptor = null;
if (account.AccountType == AccountType.User)
{
accountDescriptor = AuthenticateUtxoAccount(new AuthenticationInput {
Password = password, Account = account
});
}
else
{
accountDescriptor = AuthenticateStateAccount(new AuthenticationInput {
Password = password, Account = account
});
}
return(accountDescriptor);
}
private Tuple <byte[], byte[]> DecryptUtxoKeys(Account account, string passphrase)
{
byte[] publicSpendKeyBuf, publicViewKeyBuf;
Tuple <byte[], byte[]> keys = GetSecretKeys(account, passphrase);
publicSpendKeyBuf = ConfidentialAssetsHelper.GetPublicKey(keys.Item1);
publicViewKeyBuf = ConfidentialAssetsHelper.GetPublicKey(keys.Item2);
bool res = publicSpendKeyBuf.Equals32(account.PublicSpendKey) && publicViewKeyBuf.Equals32(account.PublicViewKey);
return(res ? keys : null);
}
private Tuple <byte[], byte[]> GetSecretKeys(Account account, string passphrase)
{
using (var aes = Aes.Create())
{
aes.IV = _dataAccessService.GetAesInitializationVector();
byte[] passphraseBytes = Encoding.ASCII.GetBytes(passphrase);
aes.Key = SHA256.Create().ComputeHash(passphraseBytes);
aes.Padding = PaddingMode.None;
byte[] secretSpendKey = aes.CreateDecryptor().TransformFinalBlock(account.SecretSpendKey, 0, account.SecretSpendKey.Length);
byte[] secretViewKey = aes.CreateDecryptor().TransformFinalBlock(account.SecretViewKey, 0, account.SecretViewKey.Length);
return(new Tuple <byte[], byte[]>(secretSpendKey, secretViewKey));
}
}
private byte[] DecryptStateKeys(Account account, string passphrase)
{
byte[] secretSpendKey;
using (var aes = Aes.Create())
{
aes.IV = _dataAccessService.GetAesInitializationVector();
byte[] passphraseBytes = Encoding.ASCII.GetBytes(passphrase);
aes.Key = SHA256.Create().ComputeHash(passphraseBytes);
aes.Padding = PaddingMode.None;
secretSpendKey = aes.CreateDecryptor().TransformFinalBlock(account.SecretSpendKey, 0, account.SecretSpendKey.Length);
}
byte[] publicSpendKeyBuf = ConfidentialAssetsHelper.GetPublicKey(Ed25519.SecretKeyFromSeed(secretSpendKey));
bool res = publicSpendKeyBuf.Equals32(account.PublicSpendKey);
return(res ? secretSpendKey : null);
}
