Delphi ActiveX 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.

Delphi ActiveX

var
success: Integer;
pdf: TChilkatPdf;
ljd: TChilkatJsonObject;
pdfVersion: WideString;
Filter: WideString;
KeyLength: Integer;
V: Integer;
R: Integer;
P: Integer;
PrintLowResolution: WideString;
PrintHighResolution: WideString;
ModifyOther: WideString;
ModifyAnnotations: WideString;
ModifyForms: WideString;
FillInForms: WideString;
AssembleDoc: WideString;
ExtractAnyPurpose: WideString;
ExtractAccessibility: WideString;
Method: WideString;

begin
success := 0;

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

pdf := TChilkatPdf.Create(Self);

//  Load a PDF.
success := pdf.LoadFile('c:/someDir/sample.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

//  Get information about the PDF that was collected in the call to LoadFile.
ljd := TChilkatJsonObject.Create(Self);
pdf.GetLastJsonData(ljd.ControlInterface);

ljd.EmitCompact := 0;

Memo1.Lines.Add(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');