(Go) Extract XML string from a .p7m byte array (e.g. FATTURA ELETTRONICA, ITALY)

Go example to extract the original XML from a .p7m (Signed-Data PKCS7 Format) provided as a byte array.

One use for this example is to extract the original XML from a Fattura Elettronica .p7m signature.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    fac := chilkat.NewFileAccess()
    var p7mBytes []byte
    p7mBytes = fac.ReadEntireFile("testData/p7m/fattura_signature.p7m")
    if fac.LastMethodSuccess() != true {
        fmt.Println(fac.LastErrorText())
        fac.DisposeFileAccess()
        return
    }

    crypt := chilkat.NewCrypt2()

    originalXml := crypt.OpaqueVerifyString(p7mBytes)
    if crypt.LastMethodSuccess() != true {
        fmt.Println(fac.LastErrorText())
        fac.DisposeFileAccess()
        crypt.DisposeCrypt2()
        return
    }

    fmt.Println("Original XML:")
    fmt.Println(*originalXml)

    fmt.Println("Success!")

    fac.DisposeFileAccess()
    crypt.DisposeCrypt2()