Create S/Mime formatted PKCS#7 Signature
Sometimes it is not enough to create a plain ASN.1 coded PKCS#7 signatures. For example if the signature should be validated with free tools like Outlook Express/Windows Mail it is essential to create a PKCS#7 Signature in S/Mime format. Please see below a very simple VB6 sample on how to create such a signature:
Dim smime As Object
Dim Files(0) As String
Dim BodyContent As String
Dim SMimeResult As String
Dim ReaderNumber As String
Set smime = CreateObject("aloahacsp.xml")
ReaderNumber = 0 'for first cardreader, first certificate
BodyContent = "Hello World"
Files(0) = "c:\bla.pdf"
If smime.make_PKCS7_mime(BodyContent, "", SMimeResult, ReaderNumber, "", Files) = True Then
Call smime.writefile(SMimeResult, "c:\result.p7m")
End If
Set smime = Nothing
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