Swift 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.

Swift

func chilkatTest() {
    var success: Bool = false

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

    let pdf = CkoPdf()!

    //  Load a PDF.
    success = pdf.loadFile(filePath: "c:/someDir/sample.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    //  Get information about the PDF that was collected in the call to LoadFile.
    let ljd = CkoJsonObject()!
    pdf.getLastJsonData(json: ljd)

    ljd.emitCompact = false

    print("\(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: String? = ljd.string(of: "pdfVersion")
    var Filter: String? = ljd.string(of: "encrypt.filter")
    var KeyLength: Int = ljd.int(of: "encrypt.keyLength").intValue
    var V: Int = ljd.int(of: "encrypt.V").intValue
    var R: Int = ljd.int(of: "encrypt.R").intValue
    var P: Int = ljd.int(of: "encrypt.P").intValue
    var PrintLowResolution: String? = ljd.string(of: "encrypt.perm.printLowResolution")
    var PrintHighResolution: String? = ljd.string(of: "encrypt.perm.printHighResolution")
    var ModifyOther: String? = ljd.string(of: "encrypt.perm.modifyOther")
    var ModifyAnnotations: String? = ljd.string(of: "encrypt.perm.modifyAnnotations")
    var ModifyForms: String? = ljd.string(of: "encrypt.perm.modifyForms")
    var FillInForms: String? = ljd.string(of: "encrypt.perm.fillInForms")
    var AssembleDoc: String? = ljd.string(of: "encrypt.perm.assembleDoc")
    var ExtractAnyPurpose: String? = ljd.string(of: "encrypt.perm.extractAnyPurpose")
    var ExtractAccessibility: String? = ljd.string(of: "encrypt.perm.extractAccessibility")
    var Method: String? = ljd.string(of: "encrypt.method")

}