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

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DataFlex 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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoCrypt
    String sOutputFile
    String sInFile
    Boolean iSuccess
    String sTemp1

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

    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End

    // What is a .p7m file?

    Move "/Users/chilkat/testData/pdf/sample.pdf" To sOutputFile
    Move "/Users/chilkat/testData/p7m/sample.pdf.p7m" To sInFile

    // Verify and restore the original file:
    Get ComVerifyP7M Of hoCrypt sInFile sOutputFile To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Success!"


End_Procedure