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();