Delphi DLL 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 DLL

var
success: Boolean;
pdf: HCkPdf;
ljd: HCkJsonObject;
pdfVersion: PWideChar;
Filter: PWideChar;
KeyLength: Integer;
V: Integer;
R: Integer;
P: Integer;
PrintLowResolution: PWideChar;
PrintHighResolution: PWideChar;
ModifyOther: PWideChar;
ModifyAnnotations: PWideChar;
ModifyForms: PWideChar;
FillInForms: PWideChar;
AssembleDoc: PWideChar;
ExtractAnyPurpose: PWideChar;
ExtractAccessibility: PWideChar;
Method: PWideChar;

begin
success := False;

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

pdf := CkPdf_Create();

//  Load a PDF.
success := CkPdf_LoadFile(pdf,'c:/someDir/sample.pdf');
if (success = False) then
  begin
    Memo1.Lines.Add(CkPdf__lastErrorText(pdf));
    Exit;
  end;

//  Get information about the PDF that was collected in the call to LoadFile.
ljd := CkJsonObject_Create();
CkPdf_GetLastJsonData(pdf,ljd);

CkJsonObject_putEmitCompact(ljd,False);

Memo1.Lines.Add(CkJsonObject__emit(ljd));

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

CkPdf_Dispose(pdf);
CkJsonObject_Dispose(ljd);