public static bool Save(IOConnectionInfo ioc, OtpInfo otpInfo)
{
Stream sOut = null;
try
{
using (var trans = App.Kp2a.GetOtpAuxFileStorage(ioc)
.OpenWriteTransaction(ioc, App.Kp2a.GetBooleanPreference(PreferenceKey.UseFileTransactions)))
{
var stream = trans.OpenFile();
WriteToStream(otpInfo, stream);
trans.CommitWrite();
}
return(true);
}
catch (Exception) { Debug.Assert(false); }
finally
{
if (sOut != null)
{
sOut.Close();
}
}
return(false);
}
public static void WriteToStream(OtpInfo otpInfo, Stream stream)
{
var xws = XmlWriterSettings();
XmlWriter xw = XmlWriter.Create(stream, xws);
XmlSerializer xs = new XmlSerializer(typeof(OtpInfo));
xs.Serialize(xw, otpInfo);
xw.Close();
}
/*
* private static byte[] Open(KeyProviderQueryContext ctx, OtpInfo otpInfo)
* {
* if(otpInfo.Type != ProvType)
* {
* MessageService.ShowWarning("Unknown OTP generator type!");
* return null;
* }
*
* OtpKeyPromptForm dlg = new OtpKeyPromptForm();
* dlg.InitEx(otpInfo, ctx);
* if(UIUtil.ShowDialogAndDestroy(dlg) != DialogResult.OK)
* return null;
*
* if(!CreateAuxFile(otpInfo, ctx)) return null;
* return otpInfo.Secret;
* }
* */
/// <summary>
/// Sets the "Secret" field in otpInfo based on the list of entered OTPs (lOtps) or the entered secret itself which is in format fmt
/// </summary>
/// based on the code in OtpKeyPromptForm.cs
public void SetSecret(OtpInfo otpInfo, List <string> lOtps, string secret, OtpDataFmt?fmt)
{
byte[] pbSecret = EncodingUtil.ParseKey(secret,
(fmt.HasValue ? fmt.Value : OtpDataFmt.Hex));
if (pbSecret != null)
{
otpInfo.Secret = pbSecret;
return;
}
if (!string.IsNullOrEmpty(otpInfo.EncryptedSecret)) // < v2.0
{
byte[] pbKey32 = OtpUtil.KeyFromOtps(lOtps.ToArray(), 0,
lOtps.Count, Convert.FromBase64String(
otpInfo.TransformationKey), otpInfo.TransformationRounds);
if (pbKey32 == null)
{
throw new InvalidOperationException();
}
pbSecret = OtpUtil.DecryptData(otpInfo.EncryptedSecret,
pbKey32, Convert.FromBase64String(otpInfo.EncryptionIV));
if (pbSecret == null)
{
throw new InvalidOperationException();
}
otpInfo.Secret = pbSecret;
otpInfo.Counter += (ulong)otpInfo.OtpsRequired;
}
else // >= v2.0, supporting look-ahead
{
bool bSuccess = false;
for (int i = 0; i < otpInfo.EncryptedSecrets.Count; ++i)
{
OtpEncryptedData d = otpInfo.EncryptedSecrets[i];
pbSecret = OtpUtil.DecryptSecret(d, lOtps.ToArray(), 0,
lOtps.Count);
if (pbSecret != null)
{
otpInfo.Secret = pbSecret;
otpInfo.Counter += ((ulong)otpInfo.OtpsRequired +
(ulong)i);
bSuccess = true;
break;
}
}
if (!bSuccess)
{
throw new InvalidOperationException();
}
}
}
public static bool CreateAuxFile(OtpInfo otpInfo,
KeyProviderQueryContext ctx, IOConnectionInfo auxFileIoc)
{
otpInfo.Type = ProvType;
otpInfo.Version = ProvVersion;
otpInfo.Generator = ProductName;
otpInfo.EncryptSecret();
if(!OtpInfo.Save(auxFileIoc, otpInfo))
{
MessageService.ShowWarning("Failed to save auxiliary OTP info file:",
auxFileIoc.GetDisplayName());
return false;
}
return true;
}
public static bool CreateAuxFile(OtpInfo otpInfo,
KeyProviderQueryContext ctx, IOConnectionInfo auxFileIoc)
{
otpInfo.Type = ProvType;
otpInfo.Version = ProvVersion;
otpInfo.Generator = ProductName;
otpInfo.EncryptSecret();
if (!OtpInfo.Save(auxFileIoc, otpInfo))
{
MessageService.ShowWarning("Failed to save auxiliary OTP info file:",
auxFileIoc.GetDisplayName());
return(false);
}
return(true);
}
public static void CreateOtpSecret(List<string> lOtps, OtpInfo otpInfo)
{
byte[] pbSecret;
if (!string.IsNullOrEmpty(otpInfo.EncryptedSecret)) // < v2.0
{
byte[] pbKey32 = OtpUtil.KeyFromOtps(lOtps.ToArray(), 0,
lOtps.Count, Convert.FromBase64String(
otpInfo.TransformationKey), otpInfo.TransformationRounds);
if (pbKey32 == null) throw new InvalidOperationException();
pbSecret = OtpUtil.DecryptData(otpInfo.EncryptedSecret,
pbKey32, Convert.FromBase64String(otpInfo.EncryptionIV));
if (pbSecret == null) throw new InvalidOperationException();
otpInfo.Secret = pbSecret;
otpInfo.Counter += otpInfo.OtpsRequired;
}
else // >= v2.0, supporting look-ahead
{
bool bSuccess = false;
for (int i = 0; i < otpInfo.EncryptedSecrets.Count; ++i)
{
OtpEncryptedData d = otpInfo.EncryptedSecrets[i];
pbSecret = OtpUtil.DecryptSecret(d, lOtps.ToArray(), 0,
lOtps.Count);
if (pbSecret != null)
{
otpInfo.Secret = pbSecret;
otpInfo.Counter += ((ulong) otpInfo.OtpsRequired +
(ulong) i);
bSuccess = true;
break;
}
}
if (!bSuccess) throw new InvalidOperationException();
}
}
private void RestoreState(Bundle savedInstanceState)
{
if (savedInstanceState != null)
{
_showPassword = savedInstanceState.GetBoolean(ShowpasswordKey, false);
MakePasswordMaskedOrVisible();
_keyFileOrProvider = savedInstanceState.GetString(KeyFileOrProviderKey);
_password = FindViewById<EditText>(Resource.Id.password).Text = savedInstanceState.GetString(PasswordKey);
_pendingOtps = new List<string>(savedInstanceState.GetStringArrayList(PendingOtpsKey));
string otpInfoString = savedInstanceState.GetString(OtpInfoKey);
if (otpInfoString != null)
{
XmlSerializer xs = new XmlSerializer(typeof(OtpInfo));
_otpInfo = (OtpInfo)xs.Deserialize(new StringReader(otpInfoString));
var enteredOtps = savedInstanceState.GetStringArrayList(EnteredOtpsKey);
ShowOtpEntry(enteredOtps);
}
UpdateKeyProviderUiState();
}
}
public static void WriteToStream(OtpInfo otpInfo, Stream stream)
{
var xws = XmlWriterSettings();
XmlWriter xw = XmlWriter.Create(stream, xws);
XmlSerializer xs = new XmlSerializer(typeof (OtpInfo));
xs.Serialize(xw, otpInfo);
xw.Close();
}
public static bool Save(IOConnectionInfo ioc, OtpInfo otpInfo)
{
Stream sOut = null;
try
{
using (var trans = App.Kp2a.GetOtpAuxFileStorage(ioc)
.OpenWriteTransaction(ioc, App.Kp2a.GetBooleanPreference(PreferenceKey.UseFileTransactions)))
{
var stream = trans.OpenFile();
WriteToStream(otpInfo, stream);
trans.CommitWrite();
}
return true;
}
catch(Exception) { Debug.Assert(false); }
finally
{
if(sOut != null) sOut.Close();
}
return false;
}
