(Visual Basic 6.0) Load a CSR and Get the SANs (Subject Alternative Names)

Demonstrates how to load a Certificate Signing Request (CSR) and get the Subject Alternative Names (if any).

Note: This example requires Chilkat v9.5.0.91 or greater.

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

' Note: Requires Chilkat v9.5.0.91 or greater.

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

Dim csr As New ChilkatCsr

' Load a CSR PEM file.  The file should contain content that looks like this:
' 
' -----BEGIN CERTIFICATE REQUEST-----
' MIIDnzCCAocCAQAwgZ4xFDASBgNVBAMMC2V4YW1wbGUuY29tMRQwEgYDVQQHDAtM
' b3MgQW5nZWxlczETMBEGA1UECAwKQ2FsaWZvcm5pYTEUMBIGA1UECgwLRXhhbXBs
' ZSBJbmMxFDASBgNVBAsMC1NTTCBTdXBwb3J0MSIwIAYJKoZIhvcNAQkBFhNleGFt
' cGxlQGV4YW1wbGUuY29tMQswCQYDVQQGEwJVUzCCASIwDQYJKoZIhvcNAQEBBQAD
' ggEPADCCAQoCggEBALhIT/q7y1xwpYaR0Coplktwn7RGaJpEBCgbJWxOVPTGL540
' erlhc6MrSEr6fo/HNtAbn6MNWm5F0MwjEU7H1Jxc7DYav+ps3hyhGaK9jalE99Sm
' yFOzKMLDPyWTPpxfT4QBO4rpWxMT2lgixDkZlaNqmC6pUGXArfH+H1F3C0gtH4ZU
' XN/Ipyk6r6ozWnJvIefdMe1JmeMD3RSoVcXd9bNWSpiD4uJnV+2pewkkNzhcGzBH
' MGi4ZjIbpPiYLlri/79fPb6u7wYkYLzCWRKzq6EaJkqY6OQgE33SC1GQKjC/fFRx
' wogub1s9cRjfL6vdqWbTJ5xhOkPeBO3UzHBHIksCAwEAAaCBujCBtwYJKoZIhvcN
' AQkOMYGpMIGmMAkGA1UdEwQCMAAwCwYDVR0PBAQDAgWgMB0GA1UdJQQWMBQGCCsG
' AQUFBwMBBggrBgEFBQcDAjBtBgNVHREEZjBkggtleGFtcGxlLmNvbYIPd3d3LmV4
' YW1wbGUuY29tgg9mdHAuZXhhbXBsZS5jb22CD3N2bi5leGFtcGxlLmNvbYIQc210
' cC5leGFtcGxlLmNvbYIQaW1hcC5leGFtcGxlLmNvbTANBgkqhkiG9w0BAQsFAAOC
' AQEAsIEDMlZViEVtuQWpfa6vUl5RfqQrop+hh9l4UmEOnERLEzyVO+9Kn7jNxyOR
' Gg7O9H4BYTfet6YwfpawbnQ1HBexduRZaUnET8RiYgKch0vWr/HbP7jvc23XUz2P
' NOAiet/tyTU6U5xJn0H4q1VFIbHjntpBSL+n+aiv8glIUepG8BwTu+vBe2/kVzKG
' ro2tudhbpEJYOwurlHCoubhCah9ryIkDeYEnycsrB6VnaxeGK0/5S2JBQo22/F9s
' T+q0Gee936ISvypLwNoIX+YFAjw2KnqucUM3RKHAAheJin5WNIQXdHHKGsImapun
' VqmPwLN6Kgm+kFVS0H5eyULSnA==
' -----END CERTIFICATE REQUEST-----

Dim fac As New CkFileAccess
Dim csrPem As String
csrPem = fac.ReadEntireTextFile("qa_data/csr/myCsr.pem","utf-8")

Dim success As Long
success = csr.LoadCsrPem(csrPem)
If (success <> 1) Then
    Debug.Print csr.LastErrorText
    Exit Sub
End If

' Get the SANs
Dim st As New ChilkatStringTable

success = csr.GetSans(st)
If (success <> 1) Then
    Debug.Print csr.LastErrorText
    Exit Sub
End If

Dim i As Long
i = 0
Dim numSans As Long
numSans = st.Count
Do While i < numSans
    Debug.Print st.StringAt(i)
    i = i + 1
Loop