private TwoFactorAuth(Remote.ClientInfo clientInfo, Settings settings, Ui ui, IHttpClient http)
{
_clientInfo = clientInfo;
_settings = settings;
_ui = ui;
_http = http;
}
public static string Start(Remote.ClientInfo clientInfo, Settings settings, Ui ui, IHttpClient http)
{
return(new TwoFactorAuth(clientInfo, settings, ui, http).Run(settings.InitialStep));
}
public static string Start(Remote.ClientInfo clientInfo, Settings settings, Ui ui)
{
return(Start(clientInfo, settings, ui, new HttpClient()));
}
// TODO: Write a test that runs the whole sequence and checks the result.
public static Vault Open(string username,
string password,
Ui ui,
ISecureStorage storage,
IHttpClient http)
{
// Step 1: Register a new deice or use the existing one from the previous run.
var deviceInfo = LoadDeviceInfo(storage) ??
Remote.RegisetNewDevice("truekey-sharp", http);
// Step 2: Parse the token to decode OTP information.
var otpInfo = Crypto.ParseClientToken(deviceInfo.Token);
// Step 3: Validate the OTP info to make sure it's got only the
// things we support at the moment.
Crypto.ValidateOtpInfo(otpInfo);
// Store the token and ID for the next time.
StoreDeviceInfo(deviceInfo, storage);
// Bundle up everything in one place
var clientInfo = new Remote.ClientInfo(username, "truekey-sharp", deviceInfo, otpInfo);
// Step 4: Auth step 1 gives us a transaction id to pass along to the next step.
var transactionId = Remote.AuthStep1(clientInfo, http);
// Step 5: Auth step 2 gives us the instructions on what to do next. For a new client that
// would be some form of second factor auth. For a known client that would be a
// pair of OAuth tokens.
var whatsNext = Remote.AuthStep2(clientInfo, password, transactionId, http);
// The device is trusted if it's already authenticated at this point and
// no second factor is needed.
var isTrusted = whatsNext.IsAuthenticated;
// Step 6: Auth FSM -- walk through all the auth steps until we're done.
var oauthToken = TwoFactorAuth.Start(clientInfo, whatsNext, ui, http);
// Step 7: Save this device as trusted not to repeat the two factor dance next times.
if (!isTrusted)
{
Remote.SaveDeviceAsTrusted(clientInfo, transactionId, oauthToken, http);
}
// Step 8: Get the vault from the server.
var encryptedVault = Remote.GetVault(oauthToken, http);
// Step 9: Compute the master key.
var masterKey = Crypto.DecryptMasterKey(password,
encryptedVault.MasterKeySalt,
encryptedVault.EncryptedMasterKey);
// Step 10: Decrypt the accounts.
var accounts = encryptedVault.EncryptedAccounts
.Select(i => new Account(
i.Id,
i.Name,
i.Username,
Crypto.Decrypt(masterKey, i.EncryptedPassword).ToUtf8(),
i.Url,
Crypto.Decrypt(masterKey, i.EncryptedNote).ToUtf8()))
.ToArray();
return(new Vault(accounts));
}