Visual FoxPro 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.

Visual FoxPro

LOCAL lnSuccess
LOCAL loPdf
LOCAL loLjd
LOCAL lcPdfVersion
LOCAL lcFilter
LOCAL lnKeyLength
LOCAL V
LOCAL R
LOCAL P
LOCAL lcPrintLowResolution
LOCAL lcPrintHighResolution
LOCAL lcModifyOther
LOCAL lcModifyAnnotations
LOCAL lcModifyForms
LOCAL lcFillInForms
LOCAL lcAssembleDoc
LOCAL lcExtractAnyPurpose
LOCAL lcExtractAccessibility
LOCAL lcMethod

lnSuccess = 0

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

loPdf = CreateObject('Chilkat.Pdf')

*  Load a PDF.
lnSuccess = loPdf.LoadFile("c:/someDir/sample.pdf")
IF (lnSuccess = 0) THEN
    ? loPdf.LastErrorText
    RELEASE loPdf
    CANCEL
ENDIF

*  Get information about the PDF that was collected in the call to LoadFile.
loLjd = CreateObject('Chilkat.JsonObject')
loPdf.GetLastJsonData(loLjd)

loLjd.EmitCompact = 0

? 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