B4X

Extract a File from a .p7m (PKCS7 Signed-Data)

See more Encryption Examples

_LANGUAGE_ example to extract the original file from a .p7m (Signed-Data PKCS7 Format) The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M. 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 crypt As ChilkatCrypt2
crypt.Initialize("crypt")

'  What is a .p7m file?

Dim outputFile As String = "/Users/chilkat/testData/pdf/sample.pdf"
Dim inFile As String = "/Users/chilkat/testData/p7m/sample.pdf.p7m"

'  Verify and restore the original file:
success = crypt.VerifyP7M(inFile, outputFile)
If success = False Then
    Log(crypt.LastErrorText)
    Return
End If


Log("Success!")