Lianja 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.

Lianja

llSuccess = .F.

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

loPdf = createobject("CkPdf")

//  Load a PDF.
llSuccess = loPdf.LoadFile("c:/someDir/sample.pdf")
if (llSuccess = .F.) then
    ? loPdf.LastErrorText
    release loPdf
    return
endif

//  Get information about the PDF that was collected in the call to LoadFile.
loLjd = createobject("CkJsonObject")
loPdf.GetLastJsonData(loLjd)

loLjd.EmitCompact = .F.

? loLjd.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

lcPdfVersion = loLjd.StringOf("pdfVersion")
lcFilter = loLjd.StringOf("encrypt.filter")
lnKeyLength = loLjd.IntOf("encrypt.keyLength")
V = loLjd.IntOf("encrypt.V")
R = loLjd.IntOf("encrypt.R")
P = loLjd.IntOf("encrypt.P")
lcPrintLowResolution = loLjd.StringOf("encrypt.perm.printLowResolution")
lcPrintHighResolution = loLjd.StringOf("encrypt.perm.printHighResolution")
lcModifyOther = loLjd.StringOf("encrypt.perm.modifyOther")
lcModifyAnnotations = loLjd.StringOf("encrypt.perm.modifyAnnotations")
lcModifyForms = loLjd.StringOf("encrypt.perm.modifyForms")
lcFillInForms = loLjd.StringOf("encrypt.perm.fillInForms")
lcAssembleDoc = loLjd.StringOf("encrypt.perm.assembleDoc")
lcExtractAnyPurpose = loLjd.StringOf("encrypt.perm.extractAnyPurpose")
lcExtractAccessibility = loLjd.StringOf("encrypt.perm.extractAccessibility")
lcMethod = loLjd.StringOf("encrypt.method")


release loPdf
release loLjd