static WindowsFingerprint()
{
using (var sec = new SHA1CryptoServiceProvider())
{
var sb = new StringBuilder();
ManagementObjectCollection collection = null;
ManagementObjectSearcher searcher = null;
searcher = new ManagementObjectSearcher("Select * From Win32_BIOS");
collection = searcher.Get();
foreach (ManagementObject mo in collection)
{
try
{
sb.Append(mo["SerialNumber"].ToString());
}
catch { }
try
{
sb.Append(mo["Manufacturer"].ToString());
}
catch { }
try
{
sb.Append(mo["Name"].ToString());
}
catch { }
}
collection.Dispose();
searcher.Dispose();
searcher = new ManagementObjectSearcher("Select * From Win32_BaseBoard");
collection = searcher.Get();
foreach (ManagementObject mo in collection)
{
try
{
sb.Append(mo["SerialNumber"].ToString());
}
catch { }
try
{
sb.Append(mo["Manufacturer"].ToString());
}
catch { }
try
{
sb.Append(mo["Name"].ToString());
}
catch { }
}
collection.Dispose();
searcher.Dispose();
byte[] bt = sec.ComputeHash(Encoding.UTF8.GetBytes(sb.ToString()));
s_fingerPrint = BitConverter.ToString(bt).Replace("-", "");
LoggerUtil.GetAppWideLogger()?.Info("My fingerprint is {0}", s_fingerPrint);
}
}
/// <summary>
/// Disables all outbound traffic from this device persistently until this action is
/// explicitly reversed.
/// </summary>
public static void DisableInternet()
{
try
{
IntPtr engineHandle = IntPtr.Zero;
var nullPtr = IntPtr.Zero;
var result = NativeMethods.FwpmEngineOpen0(null, NativeConstants.RPC_C_AUTHN_WINNT, IntPtr.Zero, IntPtr.Zero, ref engineHandle);
if (result != 0)
{
if (s_logger != null)
{
s_logger.Info("Failed to open filter engine handle: " + result);
}
return;
}
if (s_logger != null)
{
s_logger.Info("Filter engine handle opened successfully.");
}
FWPM_FILTER0_ fwpFilter = new FWPM_FILTER0_();
// Predefined windows GUID for outbound packet matching.
var FWPM_LAYER_OUTBOUND_IPPACKET_V4_MANAGED = new Guid("1e5c9fae-8a84-4135-a331-950b54229ecd");
var FWPM_LAYER_OUTBOUND_IPPACKET_V4 = new GUID();
using (var ms = new MemoryStream(FWPM_LAYER_OUTBOUND_IPPACKET_V4_MANAGED.ToByteArray()))
using (var br = new BinaryReader(ms))
{
FWPM_LAYER_OUTBOUND_IPPACKET_V4.Data1 = br.ReadUInt32();
FWPM_LAYER_OUTBOUND_IPPACKET_V4.Data2 = br.ReadUInt16();
FWPM_LAYER_OUTBOUND_IPPACKET_V4.Data3 = br.ReadUInt16();
FWPM_LAYER_OUTBOUND_IPPACKET_V4.Data4 = br.ReadBytes(8);
}
fwpFilter.layerKey = FWPM_LAYER_OUTBOUND_IPPACKET_V4;
using (var ms = new MemoryStream(INSTALLED_FILTER_ID.ToByteArray()))
using (var br = new BinaryReader(ms))
{
fwpFilter.filterKey.Data1 = br.ReadUInt32();
fwpFilter.filterKey.Data2 = br.ReadUInt16();
fwpFilter.filterKey.Data3 = br.ReadUInt16();
fwpFilter.filterKey.Data4 = br.ReadBytes(8);
}
// PERSIST OR BOOT?
fwpFilter.flags = NativeConstants.FWPM_FILTER_FLAG_PERSISTENT;
//fwpFilter.flags = NativeConstants.FWPM_FILTER_FLAG_BOOTTIME;
fwpFilter.action.type = FWP_ACTION_TYPE.FWP_ACTION_BLOCK;
fwpFilter.weight.type = FWP_DATA_TYPE_.FWP_EMPTY; // auto-weight.
fwpFilter.numFilterConditions = 0; // this applies to all application traffic
fwpFilter.displayData.name = "Citadel INet Block";
fwpFilter.displayData.description = "Enforce filter use for internet access.";
ulong runtimeId = 0;
result = NativeMethods.FwpmFilterAdd0(engineHandle, ref fwpFilter, IntPtr.Zero, ref runtimeId);
if (result != 0)
{
if (s_logger != null)
{
s_logger.Info("Failed to add filter: " + result);
}
NativeMethods.FwpmEngineClose0(engineHandle);
return;
}
if (s_logger != null)
{
s_logger.Info("Filter added successfully.");
}
result = NativeMethods.FwpmEngineClose0(engineHandle);
if (result != 0)
{
if (s_logger != null)
{
s_logger.Info("Failed to close install handle: " + result);
}
return;
}
}
catch (Exception e)
{
LoggerUtil.RecursivelyLogException(s_logger, e);
}
}
public AuthenticationResultObject Authenticate(string username, byte[] unencryptedPassword)
{
m_logger.Error(nameof(Authenticate));
AuthenticationResultObject ret = new AuthenticationResultObject();
// Enforce parameters are valid.
Debug.Assert(StringExtensions.Valid(username));
if (!StringExtensions.Valid(username))
{
throw new ArgumentException("Supplied username cannot be null, empty or whitespace.", nameof(username));
}
Debug.Assert(unencryptedPassword != null && unencryptedPassword.Length > 0);
if (unencryptedPassword == null || unencryptedPassword.Length <= 0)
{
throw new ArgumentException("Supplied password byte array cannot be null and must have a length greater than zero.", nameof(unencryptedPassword));
}
//
// Don't bother if we don't have internet.
var hasInternet = NetworkStatus.Default.HasIpv4InetConnection || NetworkStatus.Default.HasIpv6InetConnection;
if (hasInternet == false)
{
m_logger.Info("Aborting authentication attempt because no internet connection could be detected.");
ret.AuthenticationResult = AuthenticationResult.ConnectionFailed;
ret.AuthenticationMessage = "Aborting authentication attempt because no internet connection could be detected.";
return(ret);
}
// Will be set if we get any sort of web exception.
bool connectionFailure = false;
// Try to send the device name as well. Helps distinguish between clients under the same account.
string deviceName = string.Empty;
byte[] formData = null;
try
{
deviceName = Environment.MachineName;
}
catch
{
deviceName = "Unknown";
}
try
{
var authRequest = GetApiBaseRequest(m_namedResourceMap[ServiceResource.GetToken]);
// Build out username and password as post form data. We need to ensure that we mop
// up any decrypted forms of our password when we're done, and ASAP.
formData = System.Text.Encoding.UTF8.GetBytes(string.Format("email={0}&identifier={1}&device_id={2}", username, FingerPrint.Value, deviceName));
// Don't forget to the set the content length to the total length of our form POST data!
authRequest.ContentLength = formData.Length;
authRequest.ContentType = "application/x-www-form-urlencoded";
// XXX TODO - This is naughty, because we're putting our password into a string, so
// it will linger in memory. However, it appears that the provided API doesn't give
// us any choice.
// KF NOTE: Why System.String is insecure. https://stackoverflow.com/questions/1166952/net-secure-memory-structures
var encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(username + ":" + Encoding.UTF8.GetString(unencryptedPassword)));
authRequest.Headers.Add("Authorization", "Basic " + encoded);
// Grab the request stream so we can POST our login form data to it.
using (var requestStream = authRequest.GetRequestStream())
{
// Write and close.
requestStream.Write(formData, 0, formData.Length);
requestStream.Close();
}
// Now that our login form data has been POST'ed, get a response.
using (var response = (HttpWebResponse)authRequest.GetResponse())
{
// Get the response code as an int so we can range check it.
var code = (int)response.StatusCode;
// Check if the response status code is outside the "success" range of codes
// defined in HTTP. If so, we failed. We include redirect codes (3XX) as success,
// since our server side will just redirect us if we're already authed.
if (code > 199 && code < 299)
{
using (var tr = new StreamReader(response.GetResponseStream()))
{
AuthToken = tr.ReadToEnd();
UserEmail = username;
}
response.Close();
authRequest.Abort();
ret.AuthenticationResult = AuthenticationResult.Success;
return(ret);
}
else
{
if (code == 401 || code == 403)
{
m_logger.Info("Authentication failed with code: {0}.", code);
AuthToken = string.Empty;
ret.AuthenticationResult = AuthenticationResult.Failure;
return(ret);
}
else if (code > 399 && code < 499)
{
m_logger.Info("Authentication failed with code: {0}.", code);
ret.AuthenticationResult = AuthenticationResult.Failure;
return(ret);
}
}
}
}
catch (WebException e)
{
// XXX TODO - Is this sufficient?
if (e.Status == WebExceptionStatus.Timeout)
{
m_logger.Info("Authentication failed due to timeout.");
connectionFailure = true;
}
try
{
using (WebResponse response = e.Response)
{
HttpWebResponse httpResponse = (HttpWebResponse)response;
m_logger.Error("Error code: {0}", httpResponse.StatusCode);
string errorText = string.Empty;
using (Stream data = response.GetResponseStream())
using (var reader = new StreamReader(data))
{
errorText = reader.ReadToEnd();
// GS Just cleans up the punctuation at the end of string
string excpList = "$@*!.";
var chRemoved = errorText
.Select(ch => excpList.Contains(ch) ? (char?)null : ch);
errorText = string.Concat(chRemoved.ToArray()) + "!";
m_logger.Error("Stream errorText: " + errorText);
}
int code = (int)httpResponse.StatusCode;
if (code == 401 || code == 403)
{
AuthToken = string.Empty;
}
if (code > 399 && code < 499)
{
m_logger.Info("Authentication failed with code: {0}.", code);
m_logger.Info("Athentication failure text: {0}", errorText);
ret.AuthenticationMessage = errorText;
ret.AuthenticationResult = AuthenticationResult.Failure;
return(ret);
}
}
}
catch (Exception iex)
{
LoggerUtil.RecursivelyLogException(m_logger, iex);
}
// Log the exception.
m_logger.Error(e.Message);
m_logger.Error(e.StackTrace);
}
catch (Exception e)
{
while (e != null)
{
m_logger.Error(e.Message);
m_logger.Error(e.StackTrace);
e = e.InnerException;
}
m_logger.Info("Authentication failed due to a failure to process the request and response.");
AuthToken = string.Empty;
ret.AuthenticationResult = AuthenticationResult.Failure;
return(ret);
}
finally
{
// This finally block is guaranteed TM to be run, so this is where we're going to
// clean up any decrypted versions of the user's password held in memory.
if (unencryptedPassword != null && unencryptedPassword.Length > 0)
{
Array.Clear(unencryptedPassword, 0, unencryptedPassword.Length);
}
if (formData != null && formData.Length > 0)
{
Array.Clear(formData, 0, formData.Length);
}
}
m_logger.Info("Authentication failed due to a complete failure to process the request and response.");
// If we had success, we should/would have returned by now.
if (!connectionFailure)
{
AuthToken = string.Empty;
}
ret.AuthenticationResult = connectionFailure ? AuthenticationResult.ConnectionFailed : AuthenticationResult.Failure;
return(ret);
}
/// <summary>
/// Enables outbound traffic on this device if previously blocked.
/// </summary>
public static void EnableInternet()
{
try
{
IntPtr engineHandle = IntPtr.Zero;
var nullPtr = IntPtr.Zero;
var result = NativeMethods.FwpmEngineOpen0(null, NativeConstants.RPC_C_AUTHN_WINNT, IntPtr.Zero, IntPtr.Zero, ref engineHandle);
if (result != 0)
{
if (s_logger != null)
{
s_logger.Info("Failed to open filter engine handle: " + result);
}
return;
}
if (s_logger != null)
{
s_logger.Info("Filter engine handle opened successfully.");
}
var nativeGuid = new GUID();
using (var ms = new MemoryStream(INSTALLED_FILTER_ID.ToByteArray()))
using (var br = new BinaryReader(ms))
{
nativeGuid.Data1 = br.ReadUInt32();
nativeGuid.Data2 = br.ReadUInt16();
nativeGuid.Data3 = br.ReadUInt16();
nativeGuid.Data4 = br.ReadBytes(8);
}
result = NativeMethods.FwpmFilterDeleteByKey0(engineHandle, ref nativeGuid);
if (result != 0)
{
if (s_logger != null)
{
s_logger.Info("Failed to delete old installed filter: " + result);
}
NativeMethods.FwpmEngineClose0(engineHandle);
return;
}
if (s_logger != null)
{
s_logger.Info("Old handle uninstalled successfully successfully.");
}
result = NativeMethods.FwpmEngineClose0(engineHandle);
if (result != 0)
{
if (s_logger != null)
{
s_logger.Info("Failed to close uninstall handle: " + result);
}
return;
}
}
catch (Exception e)
{
LoggerUtil.RecursivelyLogException(s_logger, e);
}
}
private WebServiceUtil()
{
m_logger = LoggerUtil.GetAppWideLogger();
}