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Visual Basic 6.0

Configure a Socket for Server-Side TLS

See more Socket/SSL/TLS Examples

Demonstrates Socket.InitSslServer, which configures the object for server-side TLS using a server certificate that has access to its private key, then listens for and accepts a TLS connection.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

Background. A TLS listener presents the configured server certificate during the handshake. When client certificates are required, acceptable CA distinguished names are added before InitSslServer.

Chilkat Visual Basic 6.0 Downloads

Visual Basic 6.0
Dim success As Long
success = 0

Dim socket As New ChilkatSocket

'  The file path is relative to the application's current working directory.  An absolute path
'  may also be used.  Supply the path appropriate to your own environment.
'  The PFX password should come from a secure source rather than being hard-coded.
Dim pfxPassword As String
pfxPassword = "myPfxPassword"
Dim cert As New ChilkatCert
success = cert.LoadPfxFile("qa_data/server.pfx",pfxPassword)
If (success = 0) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

'  Configure this object for server-side TLS using the certificate.  The certificate must have
'  access to its corresponding private key.
success = socket.InitSslServer(cert)
If (success = 0) Then
    Debug.Print socket.LastErrorText
    Exit Sub
End If

'  Listen for connections.  Accepted connections will use TLS.
success = socket.BindAndListen(5000,25)
If (success = 0) Then
    Debug.Print socket.LastErrorText
    Exit Sub
End If

Dim connectedSock As New ChilkatSocket
success = socket.AcceptNext(20000,connectedSock)
If (success = 0) Then
    Debug.Print socket.LastErrorText
    Exit Sub
End If

Debug.Print "Accepted a TLS client connection."