B4X

Subject Alternative Name for ICP Brasil Certs

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Demonstrates how to access the multiple names contained in the Subject Alternative Name of a certificate. This example is for an ICP Brasil certificate. B4X

Dim success As Boolean = False

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


'  If the cert's Subject Alternative Name contains multiple values, each specified by an OID,
'  then the Rfc822Name property returns XML.
Dim subjectAltNameXml As String = cert.Rfc822Name

Log(subjectAltNameXml)

'  Here's a sample of the subjectAltNameXml:

'  <SubjectAltName>
'      <name type="oid" oid="2.16.76.1.3.4">290999653223955019700000000000000000000150424SRJUXPTS</name>
'      <name type="oid" oid="2.16.76.1.3.2">JOAO SILVA</name>
'      <name type="oid" oid="2.16.76.1.3.3">02408939000115</name>
'      <name type="oid" oid="2.16.76.1.3.7">000000000000</name>
'  </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]")
    Log(oid & ": " & name)
    i = i + 1
Loop