public async Task <string> GetSeedWords(string password)
{
var iKey = await GetIntermediateKey(password);
var encSeedWords = await _hsm.GetAsync(EncSeedWordsLoc);
var seedWords = AesThenHmac.Decrypt(encSeedWords, iKey);
return(seedWords);
}
public async Task <bool> HasGotSeedWords()
{
var seedWords = await HSM.GetAsync($"{Global.Network}-seedWords");
if (seedWords is null)
{
return(false);
}
SeedWords = seedWords.Split(' ').ToList();
return(true);
}
public async Task InitSeedWords(string password)
{
string wordString = null;
KeyManager keyManager = null;
try
{
// ensure correct pw
PasswordHelper.Guard(password);
string walletFilePath = Path.Combine(_walletManager.WalletDirectories.WalletsDir, $"{_config.Network}.json");
await Task.Run(() =>
{
keyManager = KeyManager.FromFile(walletFilePath);
keyManager.GetMasterExtKey(password ?? "");
});
await Task.Run(async() =>
{
// this next line doesn't really run async :/
wordString = await _storage.GetSeedWords(password);
if (wordString is null)
{
throw new KeyNotFoundException();
}
});
}
catch (SecurityException e)
{
// toss bad password to UI
throw e;
}
// KeyNotFoundException || ArgumentException
catch
{
// try migrate from the legacy system
var seedWords = await _hsm.GetAsync(LegacyWordsLoc);
if (string.IsNullOrEmpty(seedWords))
{
// check if corrupted and show message
throw new InvalidOperationException("Try again if you cancelled the biometric authentication. Otherwise, there are no seed words saved. Please back up using \"Export Wallet File\"");
}
// check if words match the wallet file
KeyManager legacyKM = null;
await Task.Run(() =>
{
KeyPath.TryParse(ACCOUNT_KEY_PATH, out KeyPath keyPath);
var mnemonic = new Mnemonic(seedWords);
legacyKM = KeyManager.Recover(mnemonic, password, filePath: null, keyPath, MIN_GAP_LIMIT);
});
if (legacyKM.EncryptedSecret != keyManager.EncryptedSecret)
{
throw new InvalidOperationException("Corrupt seed words. Please back up using \"Export Wallet File\" instead.");
}
await _storage.SetSeedWords(password, seedWords);
wordString = seedWords;
}
finally
{
SeedWords = wordString?.Split(' ').ToList();
}
}