Xojo Plugin

Get the Server Certificate from a TLS Connection

See more Socket/SSL/TLS Examples

Demonstrates Socket.GetServerCert, which copies the certificate presented by the remote TLS server into a Cert object for inspection.

Background. The method returns false when the socket is not connected, is not using TLS, or no server certificate is available. Inspecting the certificate lets an application validate the server's identity.

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Xojo Plugin

Dim success As Boolean
success = False

Dim socket As New Chilkat.Socket

//  Connect to the server using TLS.
Dim bTls As Boolean
bTls = True
Dim maxWaitMs As Int32
maxWaitMs = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
If (success = False) Then
    System.DebugLog(socket.LastErrorText)
    Return
End If

//  Copy the certificate presented by the remote TLS server, then inspect it.  This can be used to
//  validate the server's identity.
Dim cert As New Chilkat.Cert
success = socket.GetServerCert(cert)
If (success = False) Then
    System.DebugLog(socket.LastErrorText)
    Return
End If

System.DebugLog("Server certificate subject: " + cert.SubjectCN)
System.DebugLog("Issued by: " + cert.IssuerCN)