/// <summary>
/// Calls the authentication callback handler.
/// </summary>
/// -
/// <param name="e">An instance of <see cref="T:BluetoothAuthenticationEventArgs"/>
/// containing the details of the authentication callback.
/// </param>
protected virtual void OnAuthentication(BluetoothAuthenticationEventArgs e)
{
EventHandler <BluetoothAuthenticationEventArgs> callback = m_userCallback;
if (callback != null)
{
m_userCallback(this, e);
}
}
private int BluetoothSendAuthenticationResponseExOob(ref BLUETOOTH_DEVICE_INFO bdi,
bool?confirm, BluetoothAuthenticationEventArgs e)
{
if (!confirm.HasValue)
{
return(NativeErrorSuccess);
}
int ret;
BLUETOOTH_AUTHENTICATE_RESPONSE__OOB_DATA_INFO rsp = new BLUETOOTH_AUTHENTICATE_RESPONSE__OOB_DATA_INFO
{
negativeResponse = 1, // Default to NEGATIVE, really set below.
authMethod = e.AuthenticationMethod
};
if (!(e.AuthenticationMethod == BluetoothAuthenticationMethod.OutOfBand))
{
Debug.Fail("Bad call!!! method is: " + e.AuthenticationMethod);
return(NativeErrorNotAuthenticated);
}
rsp.bthAddressRemote = bdi.Address;
switch (confirm)
{
case true:
rsp.negativeResponse = 0;
// Set the oob values
// (Testing shows that P/Invoke disallowed only incorrect
// lengthinline arrays, null arrays are ok).
if (e.OobC != null)
{
rsp.oobInfo.C = e.OobC;
}
if (e.OobR != null)
{
rsp.oobInfo.R = e.OobR;
}
break;
case false:
case null:
Debug.Assert(confirm != null, "Should have exited above when non-response.");
rsp.negativeResponse = 1;
break;
}
ret = NativeMethods.BluetoothSendAuthenticationResponseEx(
m_radioHandle, ref rsp);
return(ret);
}
private int BluetoothSendAuthenticationResponseExNumCompPasskey(ref BLUETOOTH_DEVICE_INFO bdi,
bool?confirm, BluetoothAuthenticationEventArgs e)
{
if (!confirm.HasValue)
{
return(NativeErrorSuccess);
}
int ret;
BLUETOOTH_AUTHENTICATE_RESPONSE__NUMERIC_COMPARISON_PASSKEY_INFO rsp = new BLUETOOTH_AUTHENTICATE_RESPONSE__NUMERIC_COMPARISON_PASSKEY_INFO
{
negativeResponse = 1, // Default to NEGATIVE, really set below.
authMethod = e.AuthenticationMethod
};
if (!(e.AuthenticationMethod == BluetoothAuthenticationMethod.NumericComparison ||
e.AuthenticationMethod == BluetoothAuthenticationMethod.Passkey ||
e.AuthenticationMethod == BluetoothAuthenticationMethod.PasskeyNotification))
{
Debug.Fail("Bad call!!! method is: " + e.AuthenticationMethod);
return(NativeErrorNotAuthenticated);
}
rsp.bthAddressRemote = bdi.Address;
switch (confirm)
{
case true:
rsp.negativeResponse = 0;
// Set the response number/passcode value
if (e.ResponseNumberOrPasskey.HasValue)
{
rsp.numericComp_passkey = checked ((uint)e.ResponseNumberOrPasskey.Value);
}
break;
case false:
case null:
Debug.Assert(confirm != null, "Should have exited above when non-response.");
rsp.negativeResponse = 1;
break;
}
ret = NativeMethods.BluetoothSendAuthenticationResponseEx(
m_radioHandle, ref rsp);
return(ret);
}
private bool NativeCallback(BluetoothAuthenticationMethod method,
IntPtr param, ref BLUETOOTH_DEVICE_INFO bdi, bool versionEx,
ref BLUETOOTH_AUTHENTICATION_CALLBACK_PARAMS?pAuthCallbackParams)
{
System.Diagnostics.Debug.Assert(m_pin == null ^ m_userCallback == null);
//
System.Diagnostics.Debug.WriteLine(string.Format(
System.Globalization.CultureInfo.InvariantCulture,
"AuthenticateResponder callback (for {0}): 0x{1:X} 0x{2:X}",
m_remoteAddress, param, bdi.Address));
//
string pin;
int ret;
if (m_pin != null)
{
// Pre-specified case.
System.Diagnostics.Debug.Assert(bdi.Address == m_remoteAddress,
"Should only get callback for the single device.");
//TODO if (bdi.Address != m_remoteAddress.ToInt64()) {
// return false;
//}
pin = m_pin;
if (versionEx)
{
// TODO Want to send a positive response here to NumericComparison??
ret = BluetoothSendAuthenticationResponseExPin(ref bdi, pin);
}
else
{
ret = NativeMethods.BluetoothSendAuthenticationResponse(
m_radioHandle, ref bdi, pin);
}
}
else if (method == BluetoothAuthenticationMethod.Legacy)
{
// Callback case.
System.Diagnostics.Debug.Assert(m_userCallback != null);
BluetoothAuthenticationEventArgs e
= new BluetoothAuthenticationEventArgs(bdi);
while (true)
{
// Callback the user code
OnAuthentication(e);
// Don't proceed if no (null) passcode given, or
// if the last attempt was successful, or
// the decvice has disppeared.
if (e.Pin == null)
{
ret = NativeErrorSuccess;
break;
}
if (e.PreviousNativeErrorCode == NativeErrorSuccess && e.AttemptNumber != 0)
{
Debug.Assert(e.CallbackWithResult, "NOT CbWR but here (A#)!!");
ret = NativeErrorSuccess;
break;
}
if (e.PreviousNativeErrorCode == NativeErrorDeviceNotConnected)
{
Debug.Assert(e.CallbackWithResult, "NOT CbWR but here (DNC)!!");
// When I try this (against Win2k+Belkin and iPaq hx2190,
// both apparently with Broadcom) I see:
//[[
//Authenticate one device -- with wrong passcode here the first two times.
//Passcode respectively: 'BAD-x', 'BAD-y', '9876'
//Making PC discoverable
//Hit Return to complete
//Authenticating 0017E464CF1E wm_alan1
// Attempt# 0, Last error code 0
//Using '0.23672947484847'
//Authenticating 0017E464CF1E wm_alan1
// Attempt# 1, Last error code 1244
//Using '0.54782851764365'
//Authenticating 0017E464CF1E wm_alan1
// Attempt# 2, Last error code 1167
//Using '9876'
//Authenticating 0017E464CF1E wm_alan1
// Attempt# 3, Last error code 1167
//etc
//]]
// That is we see the error code of 1244=ErrorNotAuthenticated
// once, and then the peer device disappears (1167=ErrorDeviceNotConnected).
// I suppose that's a security feature -- its stops an attacker
// from trying again and again with different passcodes.
//
// Anyway the result of that is that is it NOT worth repeating
// the callback after the device disappears.
ret = NativeErrorSuccess;
break;
}
pin = e.Pin;
System.Diagnostics.Debug.WriteLine(string.Format(System.Globalization.CultureInfo.InvariantCulture,
"BW32Auth SendAuthRsp pin {0}", pin));
if (versionEx)
{
ret = BluetoothSendAuthenticationResponseExPin(ref bdi, pin);
}
else
{
ret = NativeMethods.BluetoothSendAuthenticationResponse(
m_radioHandle, ref bdi, pin);
}
if (ret != NativeErrorSuccess)
{
System.Diagnostics.Trace.WriteLine(string.Format(
System.Globalization.CultureInfo.InvariantCulture,
" BluetoothSendAuthenticationResponse failed: {0}=0x{0:X}", ret));
}
// Have to callback the user code after the attempt?
BluetoothAuthenticationEventArgs lastEa = e;
if (!lastEa.CallbackWithResult)
{
break;
}
e = new BluetoothAuthenticationEventArgs(ret, lastEa);
}
}
else if (method == BluetoothAuthenticationMethod.NumericComparison ||
method == BluetoothAuthenticationMethod.Passkey ||
method == BluetoothAuthenticationMethod.PasskeyNotification ||
method == BluetoothAuthenticationMethod.OutOfBand
)
{
// Callback case.
System.Diagnostics.Debug.Assert(m_userCallback != null);
BluetoothAuthenticationEventArgs e
= new BluetoothAuthenticationEventArgs(bdi, ref pAuthCallbackParams);
while (true)
{
// Callback the user code
OnAuthentication(e);
// Check if after e.CallbackWithResult...
if (e.PreviousNativeErrorCode == NativeErrorSuccess && e.AttemptNumber != 0)
{
Debug.Assert(e.CallbackWithResult, "NOT CbWR but here (A#)!!");
ret = NativeErrorSuccess;
break;
}
if (e.PreviousNativeErrorCode == NativeErrorDeviceNotConnected)
{
Debug.Assert(e.CallbackWithResult, "NOT CbWR but here (DNC)!!");
ret = NativeErrorSuccess;
break;
}
bool?confirm = e.Confirm;
System.Diagnostics.Debug.WriteLine(string.Format(System.Globalization.CultureInfo.InvariantCulture,
"BW32Auth SendAuthRspEx-NumComparison {0}", confirm));
if (confirm == null)
{
ret = NativeErrorSuccess;
break;
}
if (method != BluetoothAuthenticationMethod.OutOfBand)
{
ret = BluetoothSendAuthenticationResponseExNumCompPasskey(ref bdi, confirm, e);
}
else
{
ret = BluetoothSendAuthenticationResponseExOob(ref bdi, confirm, e);
}
if (ret != NativeErrorSuccess)
{
System.Diagnostics.Trace.WriteLine(string.Format(
System.Globalization.CultureInfo.InvariantCulture,
" BluetoothSendAuthenticationResponseEx failed: {0}=0x{0:X}", ret));
}
// Have to callback the user code after the attempt?
BluetoothAuthenticationEventArgs lastEa = e;
if (!lastEa.CallbackWithResult)
{
break;
}
e = new BluetoothAuthenticationEventArgs(ret, lastEa);
}
}
else
{
Debug.Fail("Unsupported auth method: " + method);
ret = NativeErrorSuccess;
}
//
if (ret != NativeErrorSuccess)
{
Trace.WriteLine(string.Format(
System.Globalization.CultureInfo.InvariantCulture,
"BluetoothSendAuthenticationResponse failed: {0}=0x{0:X}", ret));
}
return(true); // "The return value from this function is ignored by the system."
}
