(Xojo Plugin) Get the Server Certificate, Certificate Chain, and Root CA Certificate

Demonstrates how to get the HTTP server certificate, its certificate chain, and the root CA certificate.

Note: This example requires Chilkat v11.0.0 or greater.

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Dim success As Boolean
success = False

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

Dim http As New Chilkat.Http

// We're getting the SSL/TLS certificate, so make sure to connect to the SSL/TLS port (443).
Dim sslCert As New Chilkat.Cert
success = http.GetServerCert("apple.com",443,sslCert)
If (success = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

Dim certChain As New Chilkat.CertChain
success = sslCert.BuildCertChain(certChain)
If (success = False) Then
    System.DebugLog(sslCert.LastErrorText)
    Return
End If

Dim cert As New Chilkat.Cert
Dim i As Int32
i = 0
Dim numCerts As Int32
numCerts = certChain.NumCerts
While i < numCerts
    success = certChain.CertAt(i,cert)
    System.DebugLog("SubjectDN " + Str(i) + ": " + cert.SubjectDN)
    System.DebugLog("IssuerDN " + Str(i) + ": " + cert.IssuerDN)
    i = i + 1
Wend

// If the certificate chain reaches the root CA cert, then the last cert in the chain
// is the root CA cert.
If (certChain.ReachesRoot = True) Then
    Dim caCert As New Chilkat.Cert
    success = certChain.CertAt(numCerts - 1,caCert)
    System.DebugLog("CA Root Cert: " + caCert.SubjectDN)
End If