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LEADTOOLS Medical (Leadtools.Dicom assembly)
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GetIsclStatus Method








Leadtools.Dicom Namespace > DicomNet Class : GetIsclStatus Method
Returns the internal ISCL status when an error occurs.
Syntax
public int GetIsclStatus()
'Declaration
 

Public Function GetIsclStatus() As Integer
'Usage
 

Dim instance As DicomNet
Dim value As Integer
 
value = instance.GetIsclStatus()
public int GetIsclStatus()
 function Leadtools.Dicom.DicomNet.GetIsclStatus()

public:
int GetIsclStatus();

Return Value

The internal status. Possible values are:
Value Meaning
0 Not connected.
1 Wait for line connection check request.
2 Got a line connection check request.
3 Wait for mutual authentication request.
4 Got mutual authentication request.
5 Wait for mutual authentication pass 1.
6 Got mutual authentication pass 1.
7 Wait for mutual authentication pass 3.
8 Got mutual authentication pass 3.
11 Wait for message transmission response.
12 Encrypt and send message.
14 Compute, encrypt and send MAC.
16 Wait for random number for generating session key response.
33 Wait for line disconnection response.
50 Wait for line connection response.
51 Got line connection response, sending mutual authentication request.
52 Wait for mutual authentication response.
53 Sending mutual authentication pass 1.
54 Wait for mutual authentication pass 2.
55 Got mutual authenticate pass 2, sending mutual authenticate pass 3.
56 Wait for mutual authentication completion.
57 Neutral status.
22 Wait for random number for generating key request.
23 Computing session key.
24 Wait for packets with data.
25 Received all data, wait for MAC code.
Remarks
The current ISCL status is set to neutral if certain errors occur, and to 0 if other errors occur.

Use returned error codes with the ISCL internal status returned by this method, to find where an error occurred. For example, DicomExceptionCode.ISCLLocalIccard can occur during GetChallengeIscl, InternalAuthenticateIscl or ExternalAuthenticateIscl.

Example

This is a comprehensive sample that shows how to use DICOM Secure communication using ISCL.

Copy Code   
Imports Leadtools
Imports Leadtools.Dicom

<StructLayout(LayoutKind.Sequential)> _
Public Structure MSG
   Public hwnd As IntPtr
   Public message As UInteger
   Public wParam As IntPtr
   Public lParam As IntPtr
   Public time As UInteger
   Public p As System.Drawing.Point
End Structure
Public Enum WaitReturn
   Complete
   Timeout
End Enum

Private Class Utils
   <DllImport("user32.dll")> _
   Shared Function PeekMessage(<System.Runtime.InteropServices.Out()> ByRef lpMsg As MSG, ByVal hWnd As IntPtr, ByVal wMsgFilterMin As UInteger, _
                                  ByVal wMsgFilterMax As UInteger, ByVal wRemoveMsg As UInteger) As <MarshalAs(UnmanagedType.Bool)> Boolean
   End Function

   <DllImport("user32.dll")> _
   Shared Function TranslateMessage(ByRef lpMsg As MSG) As Boolean
   End Function
   <DllImport("user32.dll")> _
   Shared Function DispatchMessage(ByRef lpmsg As MSG) As IntPtr
   End Function

   Private Const PM_REMOVE As UInteger = 1

   Public Shared Function WaitForComplete(ByVal mill As Double, ByVal wh As WaitHandle) As WaitReturn
      Dim goal As TimeSpan = New TimeSpan(DateTime.Now.AddMilliseconds(mill).Ticks)

      Do
         Dim msg As MSG = New MSG()

         If PeekMessage(msg, IntPtr.Zero, 0, 0, PM_REMOVE) Then
            TranslateMessage(msg)
            DispatchMessage(msg)
         End If

         If wh.WaitOne(New TimeSpan(0, 0, 0), False) Then
            Return WaitReturn.Complete
         End If

         If goal.CompareTo(New TimeSpan(DateTime.Now.Ticks)) < 0 Then
            Return WaitReturn.Timeout
         End If

      Loop While True
   End Function
End Class

'
' Secure client (ISCL)
'
Public Class Client : Inherits DicomNet
   Private waitEvent As AutoResetEvent = New AutoResetEvent(False)

   Public Sub New()
      MyBase.New(Nothing, DicomNetSecurityeMode.Iscl)
      Dim authData As String = "LEAD client ISCL"

      SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW)
      SetIsclMutualAuthenticationKey(1, 11619789628100321)
      SetIsclMutualAuthenticationKey(2, 34217865672122111)
      SetIsclMutualAuthenticationKey(3, 1605935625518899689)
      SetIsclMutualAuthenticationKey(4, 138217077775855676)
      SetIsclMutualAuthenticationKey(5, 9117318694593010212)
      SetIsclMutualAuthenticationKey(6, 3485297985488245687)
      SetIsclMutualAuthenticationKey(7, 1533287511573403981)
      SetIsclMutualAuthenticationKey(8, 5604839976916070822)

      SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc)
      SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5)
      SetIsclEncryptionKey(1, 8079278526052745737)
      SetIsclEncryptionKey(2, 1312864321990916052)
      SetIsclEncryptionKey(3, 7190959962252002117)
      SetIsclEncryptionKey(4, 3619524191167482890)
      SetIsclEncryptionKey(5, 3466658849848898336)
      SetIsclEncryptionKey(6, 8474124475946342520)
      SetIsclEncryptionKey(7, 7725464453540259890)
      SetIsclEncryptionKey(8, 4320705344832296668)

      SetIsclIndexForMutualAuthentication(1)
      SetIsclEncryptionKeyIndex(1)
      SetIsclMaxMessageLength(1024000)
      SetIsclMaxCommunicationBlockLength(8129)


      Dim data As Byte() = New ASCIIEncoding().GetBytes(authData)

      SetIsclAuthenticationData(data, data.GetLength(0))
   End Sub

   Public Function Wait() As Boolean
      Dim ret As WaitReturn

      ret = Utils.WaitForComplete((2 * 60) * 1000, waitEvent)

      Return (ret = WaitReturn.Complete)
   End Function

   Protected Overrides Sub OnConnect(ByVal [error] As DicomExceptionCode)
      waitEvent.Set()
   End Sub

   Protected Overrides Sub OnSecureLinkReady(ByVal [error] As DicomExceptionCode)
      Console.WriteLine("Iscl Peer Encryption is               : {0}", GetIsclPeerEncryption())
      Console.WriteLine("Iscl Peer Mac                         : {0}", GetIsclPeerMac())
      Console.WriteLine("Iscl Communication Block Length is    : {0}", GetIsclCommunicationBlockLength())
      Console.WriteLine("Iscl Index For Encryption             : {0}", GetIsclIndexForEncryption())
      Console.WriteLine("Is Iscl Queue Empty                   : {0}", IsIsclQueueEmpty())
      Console.WriteLine("Iscl Index For Mutual Authentication  : {0}", GetIsclIndexForMutualAuthentication())
      Console.WriteLine("Iscl Status is                        : {0}", GetIsclStatus())
      'We can also call  GetIsclPeerAuthenticationData() to Get the Peer Authentication Data
      waitEvent.Set()
   End Sub

   Protected Overrides Function GetChallengeIscl(ByRef challenge As Long, ByVal parameter As Long) As Boolean
      challenge = &H123456789ABCDE1
      Return True
   End Function

   Protected Overrides Function InternalAuthenticateIscl(ByVal challenge As Long, ByRef response As Long, ByVal parameter As Long) As Boolean
      response = challenge + 1
      Return True
   End Function

   Protected Overrides Function ExternalAuthenticateIscl(ByVal challenge As Long, ByVal response As Long, ByVal parameter As Long) As Boolean
      If response = (challenge + 1) Then
         Return True
      End If

      Return False
   End Function
End Class

'
' Secure server client (ISCL)
'
Public Class ServerConnection : Inherits DicomNet
   Public Sub New()
      MyBase.New(Nothing, DicomNetSecurityeMode.Iscl)
      Dim authData As String = "LEAD server ISCL"

      SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW)
      SetIsclMutualAuthenticationKey(1, 11619789628100321)
      SetIsclMutualAuthenticationKey(2, 34217865672122111)
      SetIsclMutualAuthenticationKey(3, 1605935625518899689)
      SetIsclMutualAuthenticationKey(4, 138217077775855676)
      SetIsclMutualAuthenticationKey(5, 9117318694593010212)
      SetIsclMutualAuthenticationKey(6, 3485297985488245687)
      SetIsclMutualAuthenticationKey(7, 1533287511573403981)
      SetIsclMutualAuthenticationKey(8, 5604839976916070822)
      SetIsclIndexForMutualAuthentication(1)

      SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc)
      SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5)
      SetIsclEncryptionKey(1, 8079278526052745737)
      SetIsclEncryptionKey(2, 1312864321990916052)
      SetIsclEncryptionKey(3, 7190959962252002117)
      SetIsclEncryptionKey(4, 3619524191167482890)
      SetIsclEncryptionKey(5, 3466658849848898336)
      SetIsclEncryptionKey(6, 8474124475946342520)
      SetIsclEncryptionKey(7, 7725464453540259890)
      SetIsclEncryptionKey(8, 4320705344832296668)
      SetIsclEncryptionKeyIndex(1)

      SetIsclMaxMessageLength(1024000)
      SetIsclMaxCommunicationBlockLength(8129)

      Dim data As Byte() = New ASCIIEncoding().GetBytes(authData)
      SetIsclAuthenticationData(data, data.GetLength(0))

   End Sub

   Protected Overrides Function GetChallengeIscl(ByRef challenge As Long, ByVal parameter As Long) As Boolean
      challenge = &H123456789ABCDE1
      Return True
   End Function

   Protected Overrides Function InternalAuthenticateIscl(ByVal challenge As Long, ByRef response As Long, ByVal parameter As Long) As Boolean
      response = challenge + 1
      Return True
   End Function

   Protected Overrides Function ExternalAuthenticateIscl(ByVal challenge As Long, ByVal response As Long, ByVal parameter As Long) As Boolean
      If response = challenge + 1 Then
         Return True
      End If

      Return False
   End Function
End Class

Public Class Server : Inherits DicomNet
   Public Sub New()
      MyBase.New(Nothing, DicomNetSecurityeMode.None)
   End Sub

   Protected Overrides Sub OnAccept(ByVal [error] As DicomExceptionCode)
      Dim client As ServerConnection = New ServerConnection()

      Accept(client)
   End Sub
End Class


<TestMethod> _
Public Sub ISCLSecuritySample()
   DicomEngine.Startup()
   DicomNet.Startup()

   Using server As New Server()
      Using client As New Client()
         server.Listen("127.0.0.1", 104, 1)
         ' start server
         client.Connect("", 1000, "127.0.0.1", 104)
         ' connect to secure server
         If Not client.Wait() Then
            ' wait for connection to finish
            Debug.Fail("Connection timed out")
         End If
         Debug.Assert(client.IsConnected(), "Client not connected")

         '
         ' Wait for authenication
         '
         If Not client.Wait() Then
            Debug.Fail("Connection timed out waiting for authenication")
         End If

         ' If secure link is established you can now do your regular
         ' dicom communications.

         client.CloseForced(True)
      End Using
      server.CloseForced(True)
   End Using

   DicomEngine.Shutdown()
   DicomNet.Shutdown()
End Sub
using Leadtools;
using Leadtools.Dicom;

[StructLayout(LayoutKind.Sequential)]
public struct MSG
{
    public IntPtr hwnd;
    public uint message;
    public IntPtr wParam;
    public IntPtr lParam;
    public uint time;
    public System.Drawing.Point p;
}
public enum WaitReturn
{
    Complete,
    Timeout,
}

class Utils
{
    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool PeekMessage(out MSG lpMsg, IntPtr hWnd,
                                   uint wMsgFilterMin, uint wMsgFilterMax,
                                   uint wRemoveMsg);

    [DllImport("user32.dll")]
    static extern bool TranslateMessage([In] ref MSG lpMsg);
    [DllImport("user32.dll")]
    static extern IntPtr DispatchMessage([In] ref MSG lpmsg);

    const uint PM_REMOVE = 1;

    public static WaitReturn WaitForComplete(double mill, WaitHandle wh)
    {
        TimeSpan goal = new TimeSpan(DateTime.Now.AddMilliseconds(mill).Ticks);

        do
        {
            MSG msg = new MSG();

            if (PeekMessage(out msg, IntPtr.Zero, 0, 0, PM_REMOVE))
            {
                TranslateMessage(ref msg);
                DispatchMessage(ref msg);
            }

            if (wh.WaitOne(new TimeSpan(0, 0, 0), false))
            {
                return WaitReturn.Complete;
            }

            if (goal.CompareTo(new TimeSpan(DateTime.Now.Ticks)) < 0)
            {
                return WaitReturn.Timeout;
            }

        } while (true);
    }
}

//
// Secure client (ISCL)
//

public class Client : DicomNet
{
    AutoResetEvent waitEvent = new AutoResetEvent(false);

    public Client()
        : base(null, DicomNetSecurityeMode.Iscl)
    {
        string authData = "LEAD client ISCL";

        SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW);
        SetIsclMutualAuthenticationKey(1, 11619789628100321);
        SetIsclMutualAuthenticationKey(2, 34217865672122111);
        SetIsclMutualAuthenticationKey(3, 1605935625518899689);
        SetIsclMutualAuthenticationKey(4, 138217077775855676);
        SetIsclMutualAuthenticationKey(5, 9117318694593010212);
        SetIsclMutualAuthenticationKey(6, 3485297985488245687);
        SetIsclMutualAuthenticationKey(7, 1533287511573403981);
        SetIsclMutualAuthenticationKey(8, 5604839976916070822);

        SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc);
        SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5);
        SetIsclEncryptionKey(1, 8079278526052745737);
        SetIsclEncryptionKey(2, 1312864321990916052);
        SetIsclEncryptionKey(3, 7190959962252002117);
        SetIsclEncryptionKey(4, 3619524191167482890);
        SetIsclEncryptionKey(5, 3466658849848898336);
        SetIsclEncryptionKey(6, 8474124475946342520);
        SetIsclEncryptionKey(7, 7725464453540259890);
        SetIsclEncryptionKey(8, 4320705344832296668);

        SetIsclIndexForMutualAuthentication(1);
        SetIsclEncryptionKeyIndex(1);

        SetIsclMaxMessageLength(1024000);
        SetIsclMaxCommunicationBlockLength(8129);

        byte[] data = new ASCIIEncoding().GetBytes(authData);

        SetIsclAuthenticationData(data, data.GetLength(0));
    }

    public bool Wait()
    {
        WaitReturn ret;

        ret = Utils.WaitForComplete((2 * 60) * 1000, waitEvent);

        return (ret == WaitReturn.Complete);
    }

    protected override void OnConnect(DicomExceptionCode error)
    {
        waitEvent.Set();
    }

    protected override void OnSecureLinkReady(DicomExceptionCode error)
    {
       Console.WriteLine("Iscl Peer Encryption is               : {0}", GetIsclPeerEncryption());
       Console.WriteLine("Iscl Peer Mac                         : {0}", GetIsclPeerMac());
       Console.WriteLine("Iscl Communication Block Length is    : {0}", GetIsclCommunicationBlockLength());
       Console.WriteLine("Iscl Index For Encryption             : {0}", GetIsclIndexForEncryption());
       Console.WriteLine("Is Iscl Queue Empty                   : {0}", IsIsclQueueEmpty());
       Console.WriteLine("Iscl Index For Mutual Authentication  : {0}", GetIsclIndexForMutualAuthentication());
       Console.WriteLine("Iscl Status is                        : {0}", GetIsclStatus());
       //We can also call  GetIsclPeerAuthenticationData() to Get the Peer Authentication Data
        waitEvent.Set();
    }

    protected override bool GetChallengeIscl(ref long challenge, long parameter)
    {
        challenge = 0x0123456789ABCDE1;
        return true;
    }

   protected override bool InternalAuthenticateIscl(long challenge, ref long response, long parameter)
    {
        response = challenge + 1;
        return true;
    }

    protected override bool ExternalAuthenticateIscl(long challenge, long response, long parameter)
    {
        if (response == (challenge + 1))
            return true;

        return false;
    }
};

//
// Secure server client (ISCL)
//

public class ServerConnection : DicomNet
{
    public ServerConnection()
        : base(null, DicomNetSecurityeMode.Iscl)
    {
        string authData = "LEAD server ISCL";

        SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW);
        SetIsclMutualAuthenticationKey(1, 11619789628100321);
        SetIsclMutualAuthenticationKey(2, 34217865672122111);
        SetIsclMutualAuthenticationKey(3, 1605935625518899689);
        SetIsclMutualAuthenticationKey(4, 138217077775855676);
        SetIsclMutualAuthenticationKey(5, 9117318694593010212);
        SetIsclMutualAuthenticationKey(6, 3485297985488245687);
        SetIsclMutualAuthenticationKey(7, 1533287511573403981);
        SetIsclMutualAuthenticationKey(8, 5604839976916070822);
        SetIsclIndexForMutualAuthentication(1);

        SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc);
        SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5);
        SetIsclEncryptionKey(1, 8079278526052745737);
        SetIsclEncryptionKey(2, 1312864321990916052);
        SetIsclEncryptionKey(3, 7190959962252002117);
        SetIsclEncryptionKey(4, 3619524191167482890);
        SetIsclEncryptionKey(5, 3466658849848898336);
        SetIsclEncryptionKey(6, 8474124475946342520);
        SetIsclEncryptionKey(7, 7725464453540259890);
        SetIsclEncryptionKey(8, 4320705344832296668);
        SetIsclEncryptionKeyIndex(1);

        SetIsclMaxMessageLength(1024000);
        SetIsclMaxCommunicationBlockLength(8129);

        byte[] data = new ASCIIEncoding().GetBytes(authData);

        SetIsclAuthenticationData(data, data.GetLength(0));
    }

    protected override bool GetChallengeIscl(ref long challenge, long parameter)
    {
        challenge = 0x0123456789ABCDE1;
        return true;
    }

   protected override bool InternalAuthenticateIscl(long challenge, ref long response, long parameter)
    {
        response = challenge + 1;
        return true;
    }

    protected override bool ExternalAuthenticateIscl(long challenge, long response, long parameter)
    {
        if (response == challenge + 1)
            return true;

        return false;
    }
};

public class Server : DicomNet
{
    public Server()
        : base(null, DicomNetSecurityeMode.None)
    {
    }

    protected override void OnAccept(DicomExceptionCode error)
    {
        ServerConnection client = new ServerConnection();

        Accept(client);
    }
}

[TestMethod]
public void ISCLSecuritySample()
{
    DicomEngine.Startup();
    DicomNet.Startup();

    using (Server server = new Server())
    {
        using (Client client = new Client())
        {                   
            server.Listen("127.0.0.1", 104, 1); // start server
            client.Connect("", 1000, "127.0.0.1", 104); // connect to secure server
            if (!client.Wait()) // wait for connection to finish
            {
                Debug.Fail("Connection timed out");
            }
            Debug.Assert(client.IsConnected(), "Client not connected");

            //
            // Wait for authenication
            //

            if (!client.Wait())
            {
                Debug.Fail("Connection timed out waiting for authenication");
            }

            // If secure link is established you can now do your regular
            // dicom communications.

            client.CloseForced(true);
        }
        server.CloseForced(true);
    }

    DicomEngine.Shutdown();
    DicomNet.Shutdown();
}
Requirements

Target Platforms

See Also

Reference

DicomNet Class
DicomNet Members
GetLastIsclOrTlsError Method

Error processing SSI file
Leadtools.Dicom requires a Medical toolkit server license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features