(VB.NET UWP/WinRT) Load Particular CA Certs into a Java KeyStore

Opens a PEM file containing many CA root certificates, and creates a Java keystore containing a subset of the certificates.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

Dim jks As New Chilkat.JavaKeyStore

Dim troots As New Chilkat.TrustedRoots

' Load certificates from a file.
Dim success As Boolean = Await troots.LoadCaCertsPemAsync("qa_data/curl_cacert.pem")
If (success <> True) Then
    Debug.WriteLine(troots.LastErrorText)
    Exit Sub
End If


Dim sbDn As New Chilkat.StringBuilder
Dim sbAlias As New Chilkat.StringBuilder
Dim caseSensitive As Boolean = False

Dim i As Integer = 0
Dim numCerts As Integer = troots.NumCerts
Dim numAdded As Integer = 0
While (i < numCerts)
    Dim cacert As Chilkat.Cert = troots.GetCert(i)
    sbDn.Clear()
    sbDn.Append(cacert.SubjectDN)
    If (sbDn.Contains("Entrust.net",caseSensitive) = True) Then
        Debug.WriteLine(cacert.SubjectDN)

        ' The alias is an arbitrary unique string for each cert in the JKS.
        sbAlias.Clear()
        sbAlias.Append("cacert_")
        sbAlias.AppendInt(i + 1)
        jks.AddTrustedCert(cacert,sbAlias.GetAsString())
        numAdded = numAdded + 1
    End If


    i = i + 1
End While

' Verify the number of certs in the JKS equals the number we added.
Dim numJksCerts As Integer = jks.NumTrustedCerts
Debug.WriteLine("NumTrustedCerts = " & numJksCerts)
If (numJksCerts <> numAdded) Then
    Debug.WriteLine("Something is amiss!")
    Exit Sub
End If


' Save the JKS.
success = jks.ToFile("myPassword","qa_data/jks/entrust_caCerts.jks")
If (success <> True) Then
    Debug.WriteLine(jks.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")

' The output of this program when tested was:

' C=US, O=Entrust.net, OU=www.entrust.net/CPS incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.net Secure Server Certification Authority
' O=Entrust.net, OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.), OU=(c) 1999 Entrust.net Limited, CN=Entrust.net Certification Authority (2048)
' C=US, O="Entrust, Inc.", OU=www.entrust.net/CPS is incorporated by reference, OU="(c) 2006 Entrust, Inc.", CN=Entrust Root Certification Authority
' NumTrustedCerts = 3
' Success.