Sign

The Sign function adds a digital signature to the document.

All passwords entered into this function's properties will be visible in plain text in the Linx solution file and in the compiled .Net assembly.

Properties

Input PDF

The follow properties specify the PDF document to be loaded and modified by the operation:

Input PDF file path

Path to the PDF file.

Input authentication type

PDF files can be protected using a password or a certificate, this field indicates which type of authentication to attempt when loading the PDF.

  1. None
    The document is unprotected and can be opened immediately.
  2. Password
    The document is protected by a password.
  3. Certificate
    The document is protected by a certificate.

Certificate protected files are not supported by the "Fill form", "Sign", "Add watermark" and "Concatenate" operations.
If you need to use the operations on a certificate protected document, first remove the certificate protection using the "Change protection" operation.
The certificate must include the private key in order to be able to load the document.

Input PDF password

Password required to access the PDF file.

Input certificate source

Source to load the certificate from. (Visible when using "Certificate" authentication type.)

  1. File
    Load a certificate from a .pfx file.
  2. Store
    Load a certificate from the windows certificate store.

Input certificate file path

Path to a .pfx file containing a certificate.

Input certificate file password

Password needed to open the certificate file.

Input certificate

Certificate loaded from the windows certificate store. (Visible when using "Store" as the certificate source.)

Output PDF

The follow properties specify options for saving the PDF document after it has been modified.

Output PDF file path

Path of the PDF file to write to.

Sign

Signed at

Location where the signing took place.

Reason

Reason for signing the document.

Lock document after signing

Lock the document to prevent further changes.

Signing certificate source

  1. File
    Load the certificate from a .pfx file.
  2. Store
    Load the certificate from the windows key store.

Signing certificate file path

Path to a .pfx file containing the signing certificate.

Signing certificate file password

Password needed to decrypt the certificate file.

Signing certificate

Certificate in the windows keystore.

Signature placement

Where to place the signature in the document

  1. No visible signature (Hidden)
    Don't display a visible signature.
  2. Form signature field
    Insert the signature into an existing signature form field.
  3. On page
    Place a visible signature on a specific page in the document.

Position X (mm), Position Y (mm)

The coordinates of the signature's position on the page. (Visible if signature placement is "On page")
The X and Y coordinates refer to the horizontal and vertical offset (in mm) of the bottom-left corner of the signature, relative to the bottom-left corner of the page.

Width (mm), Height (mm)

This size of the signature box.

Field name

Form field name to place the signature in. (Visible when Signature placement is "Form signature field").

Background image

Path to an image to use as the background for the signature field. This can be left blank if no background image is needed.

Page

The page number on which the signature should be placed.