private UpdateConfig GetConfig()
{
this.MaxAttempts = int.Parse(this.maxAttemptsTextBox.Text);
var pilotStrategy = SecuCode.PilotTagSelectionFromIndex(this.pilotSelection.SelectedIndex);
var validTags = this.activeTags.Values.Where(t => t.Valid).ToArray();
if (validTags.Length == 0)
{
throw new Exception("No vaild tags, (tip: you may want to try the 'Update Valid Tags' button first).");
}
var sendMode = this.GetSendMode();
var attestMode = this.GetAttestMode();
if (sendMode == SendMode.None && attestMode == AttestMode.None)
{
throw new Exception("Both 'SendMode' and 'AttestMode' cannot be None");
}
return(new UpdateConfig
{
TargetTags = validTags.ToDictionary(t => t.TagId),
SessionKey = this.sessionKey,
Firmware = this.firmware,
TargetVersion = byte.Parse(this.version.Text),
MaxAttempts = this.MaxAttempts,
ReaderSleepTimeMs = (int)(double.Parse(this.readerOffTime.Text) * 1000.0),
BlockSize = byte.Parse(this.maxBlockSize.Text),
PilotSelectionStrategy = pilotStrategy,
SendMode = sendMode,
AttestMode = attestMode,
});
}
private byte[] GetSessionData(Tag tag, bool isObserver = false)
{
if (this.sessionKey == null || tag == null || this.bytesToSend == null)
{
throw new Exception("Tag, firmware, and/or session key was null");
}
var newVersion = this.version.Dispatcher.Invoke(() => byte.Parse(this.version.Text));
var signature = SecuCode.GenerateSignature(this.sessionKey, this.bytesToSend, tag.Version, newVersion);
byte sleepTime = 0, activeTime = 0;
this.Dispatcher.Invoke(() =>
{
if (string.IsNullOrWhiteSpace(this.sleepTime.Text) | string.IsNullOrWhiteSpace(this.activeTime.Text))
{
(sleepTime, activeTime) = Native.PAM.ComputePAM((ushort)tag.Voltage);
}
else
{
sleepTime = byte.Parse(this.sleepTime.Text);
activeTime = byte.Parse(this.activeTime.Text);
}
});
var observerFlag = isObserver ? (byte)0x01 : (byte)0x00;
return(Native.TinyCrypt.AesEncrypt_DefaultIV(tag.DeviceKey, this.sessionKey)
.Concat(signature)
.Concat(new byte[] { newVersion, sleepTime, activeTime, observerFlag })
.ToArray());
}
private void UpdateEncryptedDataTextBox()
{
this.payloadBytes.Dispatcher.Invoke(() =>
{
if (this.bytesToSend != null && this.sessionKey != null)
{
var encryptedPayload = SecuCode.EncryptPacket(this.bytesToSend, this.sessionKey);
var decryptedPayload = Native.Aes.DecryptBytes(encryptedPayload, this.sessionKey, CipherMode.CBC);
Console.WriteLine($"Encrypted: {encryptedPayload.ToByteString("0x", ",")} Length = {encryptedPayload.Length}");
Console.WriteLine($"Decrypted: {decryptedPayload.ToByteString("0x", ",")} Length = {decryptedPayload.Length}");
this.payloadBytes.Text = decryptedPayload.ToByteString();
this.encryptedPayloadBytes.Text = encryptedPayload.ToByteString();
}
});
}