- cipher
- The cipher suite for which to get the length of the mutual authentication key.
Visual Basic (Declaration) | |
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Public Function GetTlsMutualAuthenticationKeyLength( _ ByVal cipher As DicomTlsCipherSuiteType _ ) As Integer |
Visual Basic (Usage) | ![]() |
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Dim instance As DicomNet Dim cipher As DicomTlsCipherSuiteType Dim value As Integer value = instance.GetTlsMutualAuthenticationKeyLength(cipher) |
C# | |
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public int GetTlsMutualAuthenticationKeyLength( DicomTlsCipherSuiteType cipher ) |
C++/CLI | |
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public: int GetTlsMutualAuthenticationKeyLength( DicomTlsCipherSuiteType cipher ) |
Parameters
- cipher
- The cipher suite for which to get the length of the mutual authentication key.
Return Value
The effective length of the mutual authentication key associated with the specified cipher suite.This is a comprehensive sample that shows how to use DICOM Secure communication using TLS.
Visual Basic | ![]() |
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<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 (TLS) ' Private Class Client : Inherits DicomNet Private waitEvent As AutoResetEvent = New AutoResetEvent(False) Private clientPEM As String = LeadtoolsExamples.Common.ImagesPath.Path + "client.pem" Public Sub New() MyBase.New(Nothing, DicomNetSecurityeMode.Tls) SetTlsCipherSuiteByIndex(0, DicomTlsCipherSuiteType.DheRsaWithDesCbcSha) SetTlsClientCertificate(clientPEM, DicomTlsCertificateType.Pem, Nothing) 'Over here we can get detailed information about the Cipher Suite ' Can also call GetTlsCipherSuiteByIndex Dim cipherSuite As DicomTlsCipherSuiteType cipherSuite = GetTlsCipherSuite() 'Returns DicomTlsEncryptionMethodType Console.WriteLine("Encryption Algorithm is : {0}", GetTlsEncryptionAlgorithm(cipherSuite)) 'Returns DicomTlsAuthenticationMethodType Console.WriteLine("Authentication Algorithm is : {0}", GetTlsAuthenticationAlgorithm(cipherSuite)) 'Returns DicomTlsMacMethodType Console.WriteLine("Integrity Algorithm is : {0}", GetTlsIntegrityAlgorithm(cipherSuite)) 'Returns DicomTlsExchangeMethodType Console.WriteLine("Key Exchange Algorithm is : {0}", GetTlsKeyExchangeAlgorithm(cipherSuite)) Console.WriteLine("Encryption Key Length is : {0}", GetTlsEncryptionKeyLength(cipherSuite)) Console.WriteLine("Mutual Authentication Key Length is : {0}", GetTlsMutualAuthenticationKeyLength(cipherSuite)) End Sub Public Function Wait() As Boolean Dim ret As WaitReturn ret = Utils.WaitForComplete((5 * 60) * 1000, waitEvent) Return (ret = WaitReturn.Complete) End Function Protected Overrides Sub OnConnect(ByVal [error] As DicomExceptionCode) waitEvent.Set() End Sub Protected Overrides Function OnPrivateKeyPassword(ByVal encryption As Boolean) As String Return "test" End Function Protected Overrides Sub OnSecureLinkReady(ByVal [error] As DicomExceptionCode) waitEvent.Set() End Sub End Class ' ' Secure server (TLS) ' Private Class ServerConnection : Inherits DicomNet Private serverPEM As String = LeadtoolsExamples.Common.ImagesPath.Path + "server.pem" Public Sub New() MyBase.New(Nothing, DicomNetSecurityeMode.Tls) SetTlsCipherSuiteByIndex(0, DicomTlsCipherSuiteType.DheRsaWith3DesEdeCbcSha) SetTlsClientCertificate(serverPEM, DicomTlsCertificateType.Pem, Nothing) End Sub Protected Overrides Function OnPrivateKeyPassword(ByVal encryption As Boolean) As String Return "test" End Function End Class Private Class Server : Inherits DicomNet Private client As ServerConnection Public Sub New() MyBase.New(Nothing, DicomNetSecurityeMode.None) End Sub Protected Overrides Sub OnAccept(ByVal [error] As DicomExceptionCode) client = New ServerConnection() Accept(client) End Sub Protected Overloads Overrides Sub Dispose(ByVal __p1 As Boolean) client.Dispose() MyBase.Dispose(__p1) End Sub End Class Public Sub TLSSecuritySample() DicomEngine.Startup() DicomNet.Startup() Using server As Server = New Server() Using client As Client = New Client() server.Listen("127.0.0.1", 104, 1) ' start server client.Connect(Nothing, 1000, "127.0.0.1", 104) ' connect to 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 ' Once two computers have negotiated the ciphersuite, and have ' authenticated each other, they can begin transferring ' messages and data between them. ' Continue with normal dicom communication client.CloseForced(True) End Using server.CloseForced(True) End Using DicomEngine.Shutdown() DicomNet.Shutdown() End Sub |
C# | ![]() |
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[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 (TLS) // class Client : DicomNet { AutoResetEvent waitEvent = new AutoResetEvent(false); string clientPEM = LeadtoolsExamples.Common.ImagesPath.Path + "client.pem"; public Client() : base(null, DicomNetSecurityeMode.Tls) { SetTlsCipherSuiteByIndex(0, DicomTlsCipherSuiteType.DheRsaWithDesCbcSha); SetTlsClientCertificate(clientPEM,DicomTlsCertificateType.Pem, null); //Over here we can get detailed information about the Cipher Suite DicomTlsCipherSuiteType cipherSuite = GetTlsCipherSuite();// Can also call GetTlsCipherSuiteByIndex //Returns DicomTlsEncryptionMethodType Console.WriteLine("Encryption Algorithm is : {0}", GetTlsEncryptionAlgorithm(cipherSuite)); //Returns DicomTlsAuthenticationMethodType Console.WriteLine("Authentication Algorithm is : {0}", GetTlsAuthenticationAlgorithm(cipherSuite)); //Returns DicomTlsMacMethodType Console.WriteLine("Integrity Algorithm is : {0}", GetTlsIntegrityAlgorithm(cipherSuite)); //Returns DicomTlsExchangeMethodType Console.WriteLine("Key Exchange Algorithm is : {0}", GetTlsKeyExchangeAlgorithm(cipherSuite)); Console.WriteLine("Encryption Key Length is : {0}", GetTlsEncryptionKeyLength(cipherSuite)); Console.WriteLine("Mutual Authentication Key Length is : {0}", GetTlsMutualAuthenticationKeyLength(cipherSuite)); } public bool Wait() { WaitReturn ret; ret = Utils.WaitForComplete((5 * 60) * 1000, waitEvent); return (ret == WaitReturn.Complete); } protected override void OnConnect(DicomExceptionCode error) { waitEvent.Set(); } protected override string OnPrivateKeyPassword(bool encryption) { return "test"; } protected override void OnSecureLinkReady(DicomExceptionCode error) { waitEvent.Set(); } } // // Secure server (TLS) // class ServerConnection : DicomNet { string serverPEM = LeadtoolsExamples.Common.ImagesPath.Path + "server.pem"; public ServerConnection() : base(null, DicomNetSecurityeMode.Tls) { SetTlsCipherSuiteByIndex(0, DicomTlsCipherSuiteType.DheRsaWith3DesEdeCbcSha); SetTlsClientCertificate(serverPEM, DicomTlsCertificateType.Pem, null); } protected override string OnPrivateKeyPassword(bool encryption) { return "test"; } } class Server : DicomNet { ServerConnection client; public Server() : base(null, DicomNetSecurityeMode.None) { } protected override void OnAccept(DicomExceptionCode error) { client = new ServerConnection(); Accept(client); } protected override void Dispose(bool __p1) { client.Dispose(); base.Dispose(__p1); } } public void TLSSecuritySample() { 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(null, 1000, "127.0.0.1", 104); // connect to 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"); } // Once two computers have negotiated the ciphersuite, and have // authenticated each other, they can begin transferring // messages and data between them. // Continue with normal dicom communication client.CloseForced(true); } server.CloseForced(true); } DicomEngine.Shutdown(); DicomNet.Shutdown(); } |
SilverlightCSharp | ![]() |
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SilverlightVB | ![]() |
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The usual sizes for an RSA key is 512 and 1024 bits. There is a limitation for import in Europe - an RSA key must be at least 768 bits long. There are no known export restrictions. In addition, the length of the mutual authentication key can be found only after a successful call to the SetTlsClientCertificate method.
Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)