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(VBScript) Verify and Unwrap PCKS7 Signed MIME

Demonstrates calling the Verify method to verify and unwrap PKCS7 signed MIME. The MIME is restored to the original structure that it would have originally had prior to signing. The Verify method works with both detached signatures, as well as opaque/attached signatures.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

set mime = CreateObject("Chilkat_9_5_0.Mime")

success = mime.UnlockComponent("Anything for 30-day trial")
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

'  A PKCS7 signature usually embeds both the signing
'  certificate with its public key.  Therefore, it is usually
'  possible to verify a signature without the need to
'  already have the certificate installed.

'  Load the signed MIME from a file...
success = mime.LoadMimeFile("signedMime.txt")
If (success = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

'  Verify the signed MIME and restore the MIME
'  to the structure/content it had prior to signing.

verified = mime.Verify()
If (verified = 0) Then
    outFile.WriteLine(mime.LastErrorText)
    WScript.Quit
End If

'  Examine the MIME after signature verification (i.e. "unwrapping")
outFile.WriteLine(mime.GetMime())

outFile.Close

 

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