PowerShell

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.

PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

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

$pdf = New-Object Chilkat.Pdf

# Load a PDF.
$success = $pdf.LoadFile("c:/someDir/sample.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

# Get information about the PDF that was collected in the call to LoadFile.
$ljd = New-Object Chilkat.JsonObject
$pdf.GetLastJsonData($ljd)

$ljd.EmitCompact = $false

$($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")