VB.NET: Apply PDF Password & Permissions Programmatically — No Security Dialog

[Anushka]

Hello Team,

I am working in VB.NET to secure a PDF using PDF-XChange SDK.
I found a reference in your forum here: (link included):

viewtopic.php?p=162918&hilit=password#p162918

The example in that post uses:

Code: Select all

IPXC_SecurityPolicy secPolicy = secHandler.CreateNewPolicy(IPXV_Inst.GetDlgParentWindow(null));

This line automatically opens a password/security dialog window.
In my implementation, I do not want any UI prompts.
Instead, I need to:

✔ Set the user password
✔ Set the owner password
✔ Configure permissions (printing/copy/etc.)
✔ Apply security entirely in code, silently

May I please get an example of:

Creating IPXC_SecurityPolicy fully programmatically

Setting password values and permissions directly

What the IStream represents in this context (in-memory or file-backed data?)

A VB.NET code snippet following your recommended API approach

Below is the snippet from your forum that I am taking a reference from:

Code: Select all

secMethod = IPXS_Inst.StrToAtom("Standard");
IPXC_SecurityHandler secHandler = IPXC_Inst.GetSecurityHandler(secMethod);

// >> once do the following code
IStream streamWithSerializedSecPolicy; // create IStream-object to fill it below
...
IPXC_SecurityPolicy secPolicy = secHandler.CreateNewPolicy(IPXV_Inst.GetDlgParentWindow(null)); // it shows dlg to fill all sec-options
if (secPolicy != null)
     secPolicy.Store(streamWithSerializedSecPolicy);
// <<
...
IPXC_SecurityPolicy secPolicy = secHandler.LoadPolicy(streamWithSerializedSecPolicy);

op = IPXV_Inst.CreateOp(IPXV_Inst.Str2ID("op.document.setSecurity"));
op.Params["Input"].Add().v = doc;
op.Params["Options.Handler"] = "Standard";
op.Params["Options.Data"] = secPolicy;
op.Do();

I am unsure how to correctly construct the IStream object and load values into the policy without using the UI dialog, so guidance would be greatly appreciated.

Thank you!

Best Regards,
Anushka

[Daniel - PDF-XChange]

Hello, Anushka

I have raised this with the Dev team, requesting Vasyl's presence as well since he helped with the previous case. Once we have a reply from them, someone will come to post here with more details for you.

Kind regards,

[Anushka]

Hello Support, Any Update?

[Sean - PDF-XChange]

Hi Anushka,

There is no update on this yet - it will be posted here in due course.

Kind regards,

[Vasyl - PDF-XChange]

Hi Anushka,

I'm afraid there's currently no way to specify a password programmatically and without the UI. I think we'll add that feature later.

RT#7696: FR: Operation op.document.setSecurity: develop alternative and 3rd-dev-friendly method to set security-params

Cheers.