Encrypt PDFs

Set encryption options before finalizing the PDF. Use userPassword to require a password to open the file and ownerPassword to control edit permissions.

var pdfDoc = new Recipe("input.pdf", "output.pdf");

pdfDoc
  .encrypt({
    userPassword: "open-password",
    ownerPassword: "owner-password",
    userProtectionFlag: 4,
  })
  .endPDF();

A Buffer source is encrypted the same way. endPDF() passes the encrypted PDF to its callback, or writes it to the output path when one was given:

var pdfDoc = new Recipe(fs.readFileSync("input.pdf"));

pdfDoc.encrypt({ userPassword: "open-password" }).endPDF(function (pdfBuffer) {
  // pdfBuffer holds the encrypted PDF.
});

Encryption options can also be supplied while creating a new Recipe document. See Change PDF Passwords for password replacement and encryption removal.