B4X

Extract XML from FatturaPA .p7m

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Demonstrates how to verify the signature and extract the XML from a FatturaPA .p7m file. B4X

Dim success As Boolean = False

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

Dim bd As ChilkatBinData
bd.Initialize
success = bd.LoadFile("qa_data/p7m/IT01879020517_abc.xml.p7m")
If success <> True Then
    Log("Failed to load the .p7m file")
    Return
End If


Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")

'  Verify and extrct the payload contained within the .p7m.
'  In this case, the payload is the FatturaPA XML.
'  If successful, the resulting bd will contain only the XML.
Dim bVerified As Boolean = crypt.OpaqueVerifyBd(bd)
If bVerified <> True Then
    Log(crypt.LastErrorText)
    Log("Failed to extract and verify.")
    Return
End If


'  Save the XML to a file.
bd.WriteFile("qa_output/zIT01879020517_abc.xml")

'  Alternatively, load into an XML object and emit.
Dim xml As ChilkatXml
xml.Initialize
xml.LoadXml(bd.GetString("utf-8"))

Log(xml.GetXml)