/// <summary>
/// Decode Suppress Output PDU.
/// </summary>
/// <param name="data">data to be parsed</param>
/// <param name="decryptedUserData">decrypted user data to be parsed</param>
/// <param name="type">security header type</param>
/// <returns>decoded Suppress Output PDU</returns>
public StackPacket DecodeSuppressOutputPDU(
byte[] data,
byte[] decryptedUserData,
SecurityHeaderType type)
{
Client_Suppress_Output_Pdu pdu = new Client_Suppress_Output_Pdu();
int dataIndex = 0;
pdu.commonHeader = ParseMcsCommonHeader(data, ref dataIndex, type);
int userDataIndex = 0;
pdu.suppressOutputPduData = ParseTsSuppressOutputPdu(decryptedUserData, ref userDataIndex);
// ETW Provider Dump Message
if (pdu.commonHeader.securityHeader != null)
{
// RDP Standard Security
string messageName = "RDPBCGR:" + pdu.GetType().Name;
ExtendedLogger.DumpMessage(messageName, RdpbcgrUtility.DumpLevel_Layer3, pdu.GetType().Name, decryptedUserData);
}
VerifyDataLength(decryptedUserData.Length, userDataIndex, ConstValue.ERROR_MESSAGE_DATA_LENGTH_EXCEEDED);
return pdu;
}
/// <summary>
/// 2.2.11.3
/// </summary>
/// <param name="suppressPdu"></param>
public void VerifyPdu(Client_Suppress_Output_Pdu suppressPdu)
{
if (serverConfig.encryptionMethod == EncryptionMethods.ENCRYPTION_METHOD_40BIT ||
serverConfig.encryptionMethod == EncryptionMethods.ENCRYPTION_METHOD_56BIT ||
serverConfig.encryptionMethod == EncryptionMethods.ENCRYPTION_METHOD_128BIT)
{
site.CaptureRequirementIfIsInstanceOfType(suppressPdu.commonHeader.securityHeader, typeof(TS_SECURITY_HEADER1), 2174,
@"[In Client Suppress Output PDU]The securityHeader in Server Set Keyboard Indicators PDU is a Non-FIPS "
+ @"Security Header (section 2.2.8.1.1.2.2) if the Encryption Level Method selected by the server (see "
+ @"sections 5.3.2 and 2.2.1.4.3) is ENCRYPTION_LEVEL_CLIENT_COMPATIBLE (2)METHOD_40BIT (0x00000001), "
+ @"ENCRYPTION_METHOD_56BIT (0x00000008), or ENCRYPTION_LEVEL_HIGH (3METHOD_128BIT (0x00000002). ");
}
else if (serverConfig.encryptionMethod == EncryptionMethods.ENCRYPTION_METHOD_FIPS)
{
site.CaptureRequirementIfIsInstanceOfType(suppressPdu.commonHeader.securityHeader, typeof(TS_SECURITY_HEADER2), 2175,
@"In Client Suppress Output PDU, the securityHeader in Server Set Keyboard Indicators PDU is a FIPS "
+ @"Security Header if the Encryption Level Method selected by the server is ENCRYPTION_METHOD_FIPS"
+ @" (0x00000010).");
}
else if (serverConfig.encryptionMethod == EncryptionMethods.ENCRYPTION_METHOD_NONE)
{
site.CaptureRequirementIfIsNull(suppressPdu.commonHeader.securityHeader, 2176,
@"In Client Suppress Output PDU,If Enhanced RDP Security is in effect or the Encryption Method selected"
+ @" by the server is ENCRYPTION_METHOD_NONE (0), then this securityHeader MUST NOT be included in the PDU.");
}
site.CaptureRequirementIfAreEqual<ShareControlHeaderType>(ShareControlHeaderType.PDUTYPE_DATAPDU,(ShareControlHeaderType)(suppressPdu.suppressOutputPduData.shareDataHeader.shareControlHeader.pduType.typeAndVersionLow & 0xF), 2179,
@"In Suppress Output PDU Data, the type subfield of the pduType field of the Share Control Header (section 2.2.8.1.1.1.1)"
+ @" MUST be set to PDUTYPE_DATAPDU (7).");
site.CaptureRequirementIfAreEqual<pduType2_Values>(pduType2_Values.PDUTYPE2_SUPPRESS_OUTPUT, suppressPdu.suppressOutputPduData.shareDataHeader.pduType2, 2180,
@"In Suppress Output PDU Data, the type subfield of the pduType2 field of the Share Data Header MUST be set to "
+ @"PDUTYPE2_SUPPRESS_OUTPUT (35).");
bool isR2182Satisfied = suppressPdu.suppressOutputPduData.allowDisplayUpdates == AllowDisplayUpdates_SUPPRESS_OUTPUT.ALLOW_DISPLAY_UPDATES || suppressPdu.suppressOutputPduData.allowDisplayUpdates == AllowDisplayUpdates_SUPPRESS_OUTPUT.SUPPRESS_DISPLAY_UPDATES;
site.CaptureRequirementIfIsTrue(isR2182Satisfied, 2182,
@"In Suppress Output PDU Data, allowDisplayUpdates can be of two flags: SUPPRESS_DISPLAY_UPDATES 0x00, ALLOW_DISPLAY_UPDATES 0x01");
if (suppressPdu.suppressOutputPduData.allowDisplayUpdates == AllowDisplayUpdates_SUPPRESS_OUTPUT.ALLOW_DISPLAY_UPDATES)
{
bool isR2187Satisified = suppressPdu.suppressOutputPduData.desktopRect.right - suppressPdu.suppressOutputPduData.desktopRect.left != 0 &&
suppressPdu.suppressOutputPduData.desktopRect.bottom - suppressPdu.suppressOutputPduData.desktopRect.top != 0;
site.CaptureRequirementIfIsTrue(isR2187Satisified, 2187,
@"In Suppress Output PDU Data, the desktopRect field contains the coordinates of the desktop rectangle if"
+ @" the allowDisplayUpdates field is set to ALLOW_DISPLAY_UPDATES (1).");
}
else
{
bool isR2188Satisified = suppressPdu.suppressOutputPduData.desktopRect.right - suppressPdu.suppressOutputPduData.desktopRect.left == 0 &&
suppressPdu.suppressOutputPduData.desktopRect.bottom - suppressPdu.suppressOutputPduData.desktopRect.top == 0;
site.CaptureRequirementIfIsTrue(isR2188Satisified, 2188,
@"In Suppress Output PDU Data, the desktopRect field MUST NOT be included in the PDU, if the "
+ @"allowDisplayUpdates field is set to SUPPRESS_DISPLAY_UPDATES (0).");
}
}
/// <summary>
/// Create an instance of the class that is identical to the current PDU.
/// </summary>
/// <returns>The new instance.</returns>
public override StackPacket Clone()
{
Client_Suppress_Output_Pdu cloneSuppresspdu = new Client_Suppress_Output_Pdu(context);
cloneSuppresspdu.commonHeader = commonHeader.Clone();
cloneSuppresspdu.suppressOutputPduData = suppressOutputPduData;
cloneSuppresspdu.suppressOutputPduData.pad3Octects =
RdpbcgrUtility.CloneByteArray(suppressOutputPduData.pad3Octects);
return cloneSuppresspdu;
}
