Go Requires Chilkat v11.0.0+

PDF Get Encryption and Permissions Information

See more PDF Signatures Examples

Determine if a PDF is encrypted, and the associated user permissions.

Note: Some PDFs are encrypted but not password-protected. In such cases, encryption is used primarily for preventing unauthorized modifications to the document, but it doesn't restrict access. Therefore, you can open and read the document without a password.

Go

    success := false

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

    pdf := chilkat.NewPdf()

    //  Load a PDF.
    success = pdf.LoadFile("c:/someDir/sample.pdf")
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        return
    }

    //  Get information about the PDF that was collected in the call to LoadFile.
    ljd := chilkat.NewJsonObject()
    pdf.GetLastJsonData(ljd)

    ljd.SetEmitCompact(false)

    fmt.Println(*ljd.Emit())

    //  Sample output:

    //  {
    //    "pdfVersion": "1.6",
    //    "encrypt": {
    //      "filter": "/Standard",
    //      "keyLength": 128,
    //      "V": 4,
    //      "R": 4,
    //      "P": -1340,
    //      "perm": {
    //        "printLowResolution": "allowed",
    //        "printHighResolution": "allowed",
    //        "modifyOther": "not allowed",
    //        "modifyAnnotations": "allowed",
    //        "modifyForms": "not allowed",
    //        "fillInForms": "allowed",
    //        "assembleDoc": "allowed",
    //        "extractAnyPurpose": "not allowed",
    //        "extractAccessibility": "not allowed"
    //      },
    //      "method": "AESV2"
    //    }
    //  }

    //  Use this online tool to generate parsing code from sample JSON: 
    //  Generate Parsing Code from JSON

    pdfVersion := ljd.StringOf("pdfVersion")
    Filter := ljd.StringOf("encrypt.filter")
    KeyLength := ljd.IntOf("encrypt.keyLength")
    V := ljd.IntOf("encrypt.V")
    R := ljd.IntOf("encrypt.R")
    P := ljd.IntOf("encrypt.P")
    PrintLowResolution := ljd.StringOf("encrypt.perm.printLowResolution")
    PrintHighResolution := ljd.StringOf("encrypt.perm.printHighResolution")
    ModifyOther := ljd.StringOf("encrypt.perm.modifyOther")
    ModifyAnnotations := ljd.StringOf("encrypt.perm.modifyAnnotations")
    ModifyForms := ljd.StringOf("encrypt.perm.modifyForms")
    FillInForms := ljd.StringOf("encrypt.perm.fillInForms")
    AssembleDoc := ljd.StringOf("encrypt.perm.assembleDoc")
    ExtractAnyPurpose := ljd.StringOf("encrypt.perm.extractAnyPurpose")
    ExtractAccessibility := ljd.StringOf("encrypt.perm.extractAccessibility")
    Method := ljd.StringOf("encrypt.method")

    pdf.DisposePdf()
    ljd.DisposeJsonObject()