Module encryption 

PDF encryption and password protection functionality.

Structs

PasswordOptions

Password options for PDF encryption.

PdfPermissions

PDF permissions configuration.

Enums

EncryptionLevel

Encryption levels supported.

Functions

encrypt_pdf

Apply password protection to a PDF document.

encrypt_pdf_with_qpdf

Apply password protection using external qpdf tool (if available). This is a more robust solution for production use.