(Xojo Plugin) Use a Custom Set of Trusted Root Certificates

Demonstrates how to build a set of trusted root certificates to be used globally by all Chilkat classes.

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

Dim trustedRoots As New Chilkat.TrustedRoots

//  Indicate that we will NOT trust any pre-installed certificates on the system.
trustedRoots.TrustSystemCaRoots = False

// Thawte is a certificate authority that provides a .zip download of their
// root CA certificates:  https://www.thawte.com/roots/index.html
// The direct download link is: https://www.verisign.com/support/thawte-roots.zip
// Note: The above URLs are valid at the time of writing this example (29-May-2015).

// Assuming the .zip has already been downloaded, open it and load each .pem file into
// our trusted roots object.
Dim zip As New Chilkat.Zip

// Open a .zip containing PEM files, among other things..
Dim success As Boolean
success = zip.OpenZip("qa_data/certs/thawte-roots.zip")
If (success <> True) Then
    System.DebugLog(zip.LastErrorText)
    Return
End If

Dim entry As Chilkat.ZipEntry
entry = zip.FirstMatchingEntry("*.pem")
If (zip.LastMethodSuccess <> True) Then
    System.DebugLog("No entries matched.")
    Return
End If

Dim nextEntry As Chilkat.ZipEntry
Dim pemStr As String

Dim cert As New Chilkat.Cert

Dim bHasMoreEntries As Boolean
bHasMoreEntries = True
While (bHasMoreEntries = True)

    System.DebugLog("Entry: " + entry.FileName)

    // Get the PEM of the CA cert:
    pemStr = entry.UnzipToString(0,"utf-8")

    // Load it into a certificate object:
    success = cert.LoadPem(pemStr)
    If (success <> True) Then
        System.DebugLog(cert.LastErrorText)
    End If

    // Add it to the trusted roots.
    success = trustedRoots.AddCert(cert)

    // The NextMatchingEntry method was added in v9.5.0.50
    nextEntry = entry.NextMatchingEntry("*.pem")
    bHasMoreEntries = entry.LastMethodSuccess

    entry = nextEntry
Wend

//  Activate the trusted roots globally for all Chilkat objects.
//  This call really shouldn't fail, so we're not checking the return value.
success = trustedRoots.Activate()