B4X

CAdES BES Detached Signature

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Demonstrates how to create a CAdES BES detached signature file (.p7s). B4X

Dim success As Boolean = False

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

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

'  Use a digital certificate and private key from a PFX file (.pfx or .p12).
Dim pfxPath As String = "/Users/chilkat/testData/pfx/acme.pfx"
Dim pfxPassword As String = "test123"

Dim cert As ChilkatCert
cert.Initialize("cert")
success = cert.LoadPfxFile(pfxPath, pfxPassword)
If success <> True Then
    Log(cert.LastErrorText)
    Return
End If


'  Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert)
If success <> True Then
    Log(crypt.LastErrorText)
    Return
End If


'  The CadesEnabled property applies to all methods that create PKCS7 signatures. 
'  To create a CAdES-BES signature, set this property equal to true. 
crypt.CadesEnabled = True

'  We can sign any type of file, creating a .p7s as output:
Dim inFile As String = "/Users/chilkat/testData/pdf/sample.pdf"
Dim sigFile As String = "/Users/chilkat/testData/p7s/sample.p7s"

'  Create the detached CAdES-BES signature:
success = crypt.CreateP7S(inFile, sigFile)
If success = False Then
    Log(crypt.LastErrorText)
    Return
End If


success = crypt.VerifyP7S(inFile, sigFile)
If success = False Then
    Log(crypt.LastErrorText)
    Return
End If


Log("Success!")