private void SetupProvisioningWindow(PKType pKType)
{
CardPkType = pKType;
CardGeneratedKey = new NBitcoin.Key();
switch (pKType)
{
case PKType.BTC:
Network = NBitcoin.Network.Main;
break;
case PKType.BTC_TestNet:
Network = NBitcoin.Network.TestNet;
break;
case PKType.CUSTOM:
CardGeneratedKey = null;
Network = null;
break;
}
if (CardGeneratedKey != null)
{
PublicKeyTextBox.Text = CardGeneratedKey.PubKey.GetAddress(Network).ToString();
PrivateKeyTextBox.Text = CardGeneratedKey.GetBitcoinSecret(Network).ToWif();
//HelperText.Text = "When setting up a Bitcoin address, a private key is automatically generated for you. You can replace the private key data with a seed phrase mnemonic or your own WIF address.";
}
else
{
PublicKeyTextBox.Text = String.Empty;
PrivateKeyTextBox.Text = String.Empty;
// HelperText.Text = "Public data is not encrypted and optional. Any data may be used in the Private Key textbox, as long as it is under 96 bytes.";
}
}
private void ProvisionCardButton_Click(object sender, RoutedEventArgs e)
{
CreateKeyErrorLabel.Content = "";
CreatingKeyLabel.Content = "";
if (passphrase.Password.Length == 0 || passphraseConfirmation.Password.Length == 0)
{
CreateKeyErrorLabel.Content = "A passphrase was not entered.";
return;
}
if (passphrase.Password != passphraseConfirmation.Password)
{
CreateKeyErrorLabel.Content = "Passphrases entered did not match.";
return;
}
if (PrivateKeyTextBox.Text.Length == 0)
{
CreateKeyErrorLabel.Content = "No private key data to store.";
return;
}
if (CardPkType == PKType.BTC || CardPkType == PKType.BTC_TestNet)
{
// Check if we are importing a user's wif or mnemonic, update public key field
// to allow the user to confirm
if (CardGeneratedKey.GetBitcoinSecret(Network).ToWif() != PrivateKeyTextBox.Text)
{
try
{
NBitcoin.Key importedKey = null;
int spacesDetected = PrivateKeyTextBox.Text.Count(a => a == ' ');
// Check for mnemonic
if (spacesDetected >= 11)
{
NBitcoin.Mnemonic mnemonic = new NBitcoin.Mnemonic(PrivateKeyTextBox.Text);
// Force bitcoin and first address
importedKey = mnemonic.DeriveExtKey().Derive(KeyPath.Parse("m/44'/0'/0'/0/0")).PrivateKey;
}
else
{
// Check for wif
importedKey = NBitcoin.Key.Parse(PrivateKeyTextBox.Text);
}
// Replace CardGeneratedKey with imported key. Only valid for bitcoin addresses.
CardGeneratedKey = importedKey;
PublicKeyTextBox.Text = importedKey.PubKey.GetAddress(Network).ToString();
PrivateKeyTextBox.Text = importedKey.GetBitcoinSecret(Network).ToWif();
CreatingKeyLabel.Content = "Key data imported, ready to setup your bChip.";
return;
}
catch (Exception ex)
{
Logger.Log(ex);
CreateKeyErrorLabel.Content = "Failed to automatically parse private key data.";
return;
}
}
}
byte[] privateKeyToEncrypt = null;
byte[] publicKeyData = null;
if (CardGeneratedKey != null)
{
// Users can optionally remove the public key portion, so we'll skip saving it.
if (PublicKeyTextBox.Text.Length > 0)
{
publicKeyData = CardGeneratedKey.PubKey.ToBytes();
}
byte[] privateKeyBytes = CardGeneratedKey.GetWif(Network.Main).ToBytes();
// Always seem to get an extra bit at the end...
if (privateKeyBytes.Length == 33 && privateKeyBytes[32] == 0x1)
{
privateKeyToEncrypt = privateKeyBytes.Take(32).ToArray();
}
else
{
privateKeyToEncrypt = privateKeyBytes;
}
}
else
{
if (PublicKeyTextBox.Text.Length > 0)
{
publicKeyData = CryptographicBuffer.ConvertStringToBinary(PublicKeyTextBox.Text, BinaryStringEncoding.Utf8).ToArray();
}
privateKeyToEncrypt = CryptographicBuffer.ConvertStringToBinary(PrivateKeyTextBox.Text, BinaryStringEncoding.Utf8).ToArray();
}
if (privateKeyToEncrypt.Length > BChipMemoryLayout_BCHIP.PRIVATEKEY_MAX_DATA)
{
CreateKeyErrorLabel.Content =
$"Private key was {PrivateKeyTextBox.Text.Length} bytes, {Math.Abs(PrivateKeyTextBox.Text.Length - BChipMemoryLayout_BCHIP.PRIVATEKEY_MAX_DATA)} bytes over the limit.";
return;
}
if (publicKeyData != null)
{
if (publicKeyData.Length > BChipMemoryLayout_BCHIP.PUBKEY_MAX_DATA)
{
CreateKeyErrorLabel.Content =
$"Public key was {PublicKeyTextBox.Text.Length} bytes, {Math.Abs(PublicKeyTextBox.Text.Length - BChipMemoryLayout_BCHIP.PUBKEY_MAX_DATA)} bytes over the limit.";
return;
}
}
string friendlyName = FriendlyNameTextBox.Text;
ProvisionNewKeysViewGrid.Dispatcher.BeginInvoke(new Action(() =>
{
ProvisionNewKeysViewGrid.IsEnabled = false;
}));
Task.Run(new Action(() =>
{
try
{
UpdateTextLabel(CreatingKeyLabel, "Setting up bChip! Do not remove card.");
// Encrypt data
BChipMemoryLayout_BCHIP bchip = LoadedBChips.SmartCardData as BChipMemoryLayout_BCHIP;
bchip.EncryptPrivateKeyData(CardPkType, passphrase.Password, privateKeyToEncrypt, publicKeyData);
bchip.SetFriendlyName(friendlyName);
using (var context = _contextFactory.Establish(SCardScope.System))
{
using (var isoReader = new IsoReader(context, LoadedBChips.ReaderName, SCardShareMode.Shared, SCardProtocol.Any))
{
if (LoadedBChips.AdpuInterface.RequiresInit)
{
Response initResponse = isoReader.Transmit(LoadedBChips.AdpuInterface.InitCard());
if (initResponse.SW1 != 0x90)
{
Logger.Log("Error initializing smart card reader");
}
}
var unlockResponse = isoReader.Transmit(LoadedBChips.AdpuInterface.UnblockCard());
Logger.Log($"ADPU response from pin request: {unlockResponse.StatusWord:X}");
if (unlockResponse.SW1 != 0x90)
{
UpdateTextLabel(CreatingKeyLabel, "");
UpdateTextLabel(CreateKeyErrorLabel, "Could not be unlock bchip for writing.");
return;
}
var writeResponse = isoReader.Transmit(LoadedBChips.AdpuInterface.WriteCard(bchip));
Logger.Log($"ADPU response from write card data: {unlockResponse.StatusWord:X}");
if (writeResponse.StatusWord != 0x00009000)
{
UpdateTextLabel(CreatingKeyLabel, "");
UpdateTextLabel(CreateKeyErrorLabel, "Failure writing data to the bchip.");
return;
}
}
}
UpdateTextLabel(CreatingKeyLabel, string.Empty);
ClearTextBox(FriendlyNameTextBox);
// Done? clear loaded card, reload card
LoadedBChips = null;
ChangePageUi(PageToShow.NoCard, null);
ScanAndLoadConnectedCards();
}
catch (Exception ex)
{
Logger.Log(ex);
}
finally
{
ProvisionNewKeysViewGrid.Dispatcher.BeginInvoke(new Action(() =>
{
ProvisionNewKeysViewGrid.IsEnabled = true;
}));
}
}));
}
public void Lesson4()
{
Key key = new Key();
BitcoinSecret secret = key.GetBitcoinSecret(Network.Main);
Console.WriteLine("Bitcoin Secret: {0}", secret);
}