private byte[] TryGetAndMigrate(string key)
{
if (_oldKeyStorageService.Contains(key))
{
var value = _oldKeyStorageService.Retrieve(key);
Store(key, value);
return(value);
}
var formattedKeyV1 = string.Format(SettingsFormatV1, key);
if (_settings.Contains(formattedKeyV1))
{
var aesKeyV1 = GetAesKey(true);
if (aesKeyV1 != null)
{
try
{
var cs = _settings.GetValueOrDefault(formattedKeyV1, null);
var value = App.Utilities.Crypto.AesCbcDecrypt(new App.Models.CipherString(cs), aesKeyV1);
Store(key, value);
return(value);
}
catch
{
Console.WriteLine("Failed to decrypt v1 from secure storage.");
}
}
_settings.Remove(formattedKeyV1);
}
return(null);
}
public string GetTwoFactorToken(string email)
{
var emailEncoded = Convert.ToBase64String(Encoding.UTF8.GetBytes(email));
var tokenBytes = _secureStorage.Retrieve(string.Format(TwoFactorTokenKeyFormat, emailEncoded));
if (tokenBytes == null)
{
return(null);
}
return(Encoding.UTF8.GetString(tokenBytes, 0, tokenBytes.Length));
}
private string GetAppId(string key, ref Guid?appId)
{
if (appId.HasValue)
{
return(appId.Value.ToString());
}
var appIdBytes = _secureStorageService.Retrieve(key);
if (appIdBytes != null)
{
appId = new Guid(appIdBytes);
return(appId.Value.ToString());
}
appId = Guid.NewGuid();
_secureStorageService.Store(key, appId.Value.ToByteArray());
return(appId.Value.ToString());
}
