(Visual Basic 6.0) Binary Certificate Extension Data

See more Certificates Examples

Demonstrates how to binary certificate extension data by OID.

The GetExtensionBd method is added in Chilkat v9.5.0.96.

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

Dim cert As New ChilkatCert

Dim success As Long
success = cert.LoadFromFile("qa_data/certs/testCert.cer")
If (success = 0) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

Dim bd As New ChilkatBinData

' The particular certificate in this test contains the following extensions

Dim oid As String
oid = "1.2.250.1.71.1.2.5"
success = cert.GetExtensionBd(oid,bd)
If (success = 1) Then
    Debug.Print oid & ": " & bd.GetEncoded("hex_lower")
End If

oid = "1.2.250.1.71.1.2.2"
success = cert.GetExtensionBd(oid,bd)
If (success = 1) Then
    Debug.Print oid & ": " & bd.GetEncoded("hex_lower")
End If

oid = "1.2.250.1.71.1.2.3"
success = cert.GetExtensionBd(oid,bd)
If (success = 1) Then
    Debug.Print oid & ": " & bd.GetEncoded("hex_lower")
End If

oid = "1.2.250.1.71.1.2.7"
success = cert.GetExtensionBd(oid,bd)
If (success = 1) Then
    Debug.Print oid & ": " & bd.GetEncoded("hex_lower")
End If

oid = "1.2.250.1.71.4.2.5"
success = cert.GetExtensionBd(oid,bd)
If (success = 1) Then
    Debug.Print oid & ": " & bd.GetEncoded("hex_lower")
End If

' Sample output:
' 1.2.250.1.71.1.2.5: 040180
' 1.2.250.1.71.1.2.2: 020100
' 1.2.250.1.71.1.2.3: 1315383032353030303030312f32393030303539313432
' 1.2.250.1.71.1.2.7: 02010a
' 1.2.250.1.71.4.2.5: 30060c04534d3236

' The above binary values are actually ASN.1
' You can get the ASN.1 decoed by calling GetExtensionAsXml to get it in XML format,
' and then you extract the values from the XML.

oid = "1.2.250.1.71.1.2.5"
Dim strXml As String
strXml = cert.GetExtensionAsXml(oid)
If (cert.LastMethodSuccess = 1) Then
    Debug.Print oid & ": " & strXml
End If

oid = "1.2.250.1.71.1.2.2"
strXml = cert.GetExtensionAsXml(oid)
If (cert.LastMethodSuccess = 1) Then
    Debug.Print oid & ": " & strXml
End If

oid = "1.2.250.1.71.1.2.3"
strXml = cert.GetExtensionAsXml(oid)
If (cert.LastMethodSuccess = 1) Then
    Debug.Print oid & ": " & strXml
End If

oid = "1.2.250.1.71.1.2.7"
strXml = cert.GetExtensionAsXml(oid)
If (cert.LastMethodSuccess = 1) Then
    Debug.Print oid & ": " & strXml
End If

oid = "1.2.250.1.71.4.2.5"
strXml = cert.GetExtensionAsXml(oid)
If (cert.LastMethodSuccess = 1) Then
    Debug.Print oid & ": " & strXml
End If

' Sample output:
' 1.2.250.1.71.1.2.5: <octets>gA==</octets>
' 1.2.250.1.71.1.2.2: <int>00</int>
' 1.2.250.1.71.1.2.3: <printable>8025000001/2900059142</printable>
' 1.2.250.1.71.1.2.7: <int>0A</int>
' 1.2.250.1.71.4.2.5: <sequence><utf8>SM26</utf8></sequence>

' "gA==" is the base64 encoded byte values
' "0A" is hex for decimal 1