B4X

Subject Alternative Name

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Demonstrates the usage of the SubjectAlternativeName property to get the certificate SAN (subject alternative name) as XML. B4X

Dim success As Boolean = False

'  Note: Not all certificates contain a Subject Alternative Name.
'  If it does not, the SubjectAlternativeName property will contain the empty string.

Dim cert As ChilkatCert
cert.Initialize("cert")

success = cert.LoadFromFile("qa_data/certs/testIcpBrasil.cer")
If success = False Then
    Log(cert.LastErrorText)
    Return
End If


Dim subjectAltNameXml As String = cert.SubjectAlternativeName

Log(subjectAltNameXml)

'  Here's a sample of the subjectAltNameXml:

'  <?xml version="1.0" encoding="utf-8"?>
'  <SubjectAltName>
'      <name type="oid" oid="2.16.76.1.3.4">...</name>
'      <name type="oid" oid="2.16.76.1.3.2">...</name>
'      <name type="oid" oid="2.16.76.1.3.3">...</name>
'      <name type="oid" oid="2.16.76.1.3.7">...</name>
'      <rfc822Name>...</rfc822Name>
'  </SubjectAltName>

'  The XML can be parsed like this:

Dim xml As ChilkatXml
xml.Initialize

xml.LoadXml(subjectAltNameXml)

Dim oid As String
Dim name As String

Dim i As Int = 0
Dim count_i As Int = xml.NumChildrenHavingTag("name")
Do While i < count_i
    xml.I = i
    oid = xml.ChilkatPath("name[i]|(oid)")
    name = xml.GetChildContent("name[i]")
    i = i + 1
Loop
Dim rfc822Name As String = xml.GetChildContent("rfc822Name")