PowerBuilder

Examine Client Certificates for an Accepted TLS Connection

See more Socket/SSL/TLS Examples

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

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

li_Success = 0

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

loo_ListenSslSocket = create oleobject
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
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_Cert.LoadPfxFile("qa_data/serverCert/myServerCert.pfx","pfx_password")
if li_Success = 0 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 = 0 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 = 0 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 = create oleobject
li_rc = loo_ClientSock.ConnectToNewObject("Chilkat.Socket")

li_Success = loo_ListenSslSocket.AcceptNext(li_MaxWaitMillisec,loo_ClientSock)
if li_Success = 0 then
    Write-Debug loo_ListenSslSocket.LastErrorText
    destroy loo_ListenSslSocket
    destroy loo_Cert
    destroy loo_ClientSock
    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)

loo_ClientCert = create oleobject
li_rc = loo_ClientCert.ConnectToNewObject("Chilkat.Cert")

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

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


destroy loo_ListenSslSocket
destroy loo_Cert
destroy loo_ClientSock
destroy loo_ClientCert