Node.js

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.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var pdf = new chilkat.Pdf();

    //  Load a PDF.
    success = pdf.LoadFile("c:/someDir/sample.pdf");
    if (success == false) {
        console.log(pdf.LastErrorText);
        return;
    }

    //  Get information about the PDF that was collected in the call to LoadFile.
    var ljd = new chilkat.JsonObject();
    pdf.GetLastJsonData(ljd);

    ljd.EmitCompact = false;

    console.log(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

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

}

chilkatExample();