B4X 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.

B4X

Dim success As Boolean = False

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

Dim pdf As ChilkatPdf
pdf.Initialize("pdf")

'  Load a PDF.
success = pdf.LoadFile("c:/someDir/sample.pdf")
If success = False Then
    Log(pdf.LastErrorText)
    Return
End If


'  Get information about the PDF that was collected in the call to LoadFile.
Dim ljd As ChilkatJsonObject
ljd.Initialize
pdf.GetLastJsonData(ljd)

ljd.EmitCompact = False

Log(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



Dim pdfVersion As String = ljd.StringOf("pdfVersion")
Dim Filter As String = ljd.StringOf("encrypt.filter")
Dim KeyLength As Int = ljd.IntOf("encrypt.keyLength")
Dim V As Int = ljd.IntOf("encrypt.V")
Dim R As Int = ljd.IntOf("encrypt.R")
Dim P As Int = ljd.IntOf("encrypt.P")
Dim PrintLowResolution As String = ljd.StringOf("encrypt.perm.printLowResolution")
Dim PrintHighResolution As String = ljd.StringOf("encrypt.perm.printHighResolution")
Dim ModifyOther As String = ljd.StringOf("encrypt.perm.modifyOther")
Dim ModifyAnnotations As String = ljd.StringOf("encrypt.perm.modifyAnnotations")
Dim ModifyForms As String = ljd.StringOf("encrypt.perm.modifyForms")
Dim FillInForms As String = ljd.StringOf("encrypt.perm.fillInForms")
Dim AssembleDoc As String = ljd.StringOf("encrypt.perm.assembleDoc")
Dim ExtractAnyPurpose As String = ljd.StringOf("encrypt.perm.extractAnyPurpose")
Dim ExtractAccessibility As String = ljd.StringOf("encrypt.perm.extractAccessibility")
Dim Method As String = ljd.StringOf("encrypt.method")