(PowerBuilder) Examine Client Certificates for an Accepted TLS Connection

Demonstrates how to access the client certificates for a TLS connection accepted by your application acting as the server.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_ListenSslSocket
oleobject loo_Cert
integer li_Success
integer li_MyPort
integer li_BackLog
integer li_MaxWaitMillisec
oleobject loo_ClientSock
integer li_NumClientCerts
integer i
oleobject loo_ClientCert

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_ListenSslSocket = create oleobject
// Use "Chilkat_9_5_0.Socket" for versions of Chilkat < 10.0.0
li_rc = loo_ListenSslSocket.ConnectToNewObject("Chilkat.Socket")
if li_rc < 0 then
    destroy loo_ListenSslSocket
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// An SSL/TLS server needs a digital certificate.  This example loads it from a PFX file.
// This is the server's certificate.

loo_Cert = create oleobject
// Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_Cert.LoadPfxFile("qa_data/serverCert/myServerCert.pfx","pfx_password")
if li_Success <> 1 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_ListenSslSocket
    destroy loo_Cert
    return
end if

// To accept client client certificates in the TLS handshake,
// we must indicate a list of acceptable client certificate root CA DN's
// that are allowed.  (DN is an acronym for Distinguished Name.)
// Call AddSslAcceptableClientCaDn once for each acceptable CA DN.
// Here are a few examples so you can see the general format of a DN.
loo_ListenSslSocket.AddSslAcceptableClientCaDn("C=SE, O=AddTrust AB, OU=AddTrust External TTP Network, CN=AddTrust External CA Root")
loo_ListenSslSocket.AddSslAcceptableClientCaDn("O=Digital Signature Trust Co., CN=DST Root CA X3")

// Initialize with our server's TLS certificate.
li_Success = loo_ListenSslSocket.InitSslServer(loo_Cert)
if li_Success <> 1 then
    Write-Debug loo_ListenSslSocket.LastErrorText
    destroy loo_ListenSslSocket
    destroy loo_Cert
    return
end if

// Bind and listen on a port:
li_MyPort = 8123
// Allow for a max of 5 queued connect requests.
li_BackLog = 5
li_Success = loo_ListenSslSocket.BindAndListen(li_MyPort,li_BackLog)
if li_Success <> 1 then
    Write-Debug loo_ListenSslSocket.LastErrorText
    destroy loo_ListenSslSocket
    destroy loo_Cert
    return
end if

// Accept the next incoming connection.
li_MaxWaitMillisec = 20000
loo_ClientSock = loo_ListenSslSocket.AcceptNextConnection(li_MaxWaitMillisec)
if loo_ListenSslSocket.LastMethodSuccess = 0 then
    Write-Debug loo_ListenSslSocket.LastErrorText
    destroy loo_ListenSslSocket
    destroy loo_Cert
    return
end if

// Examine the client certs chain.  The 1st cert will be the client certificate, and
// the subsequent certs will be the certs in the chain of authentication.
li_NumClientCerts = loo_ClientSock.NumReceivedClientCerts
Write-Debug "numClientCerts = " + string(li_NumClientCerts)

i = 0
do while i < li_NumClientCerts
    loo_ClientCert = loo_ClientSock.GetReceivedClientCert(i)
    Write-Debug loo_ClientCert.SubjectDN
    destroy loo_ClientCert
    i = i + 1
loop

// Close the connection with the client
li_Success = loo_ClientSock.Close(1000)

destroy loo_ClientSock


destroy loo_ListenSslSocket
destroy loo_Cert