Sign
The Sign function adds a digital signature to a PDF document.
Properties
Input
The following properties specify the PDF document to be loaded and modified by the operation:
File path
Path to the PDF file.
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.
None
The document is unprotected and can be opened immediately.Password
The document is protected by a password.Certificate
The document is protected by a certificate.
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.
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.
Misc
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.
Output
File path
Path of the PDF file to write to.
Signature
Signature placement
Where to place the signature in the document
- No visible signature Don't display a visible signature.
- Form signature field
Insert the signature into an existing signature form field. - On page
Place a visible signature on a specific page in the document.
Displayed when Signature placement is 'Form signature field'.
Field name
Form field name to place the signature in.
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.
Displayed when Signature placement is 'On page'.
Position X (mm)
Distance of the left side of the signature from the left side of the page in millimeters.
Position Y (mm)
Distance of the bottom of the signature from the bottom of the page in millimeters.
Width (mm)
Width of the signature box in millimeters.
Height (mm)
Height of the signature box in millimeters.
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.
Signing certificate
Certificate source
Source to load the certificate from.
Options:
- File
Load the certificate from a .pfx file. - Store
Load the certificate from the windows key store.
Certificate file path
Path to a .pfx file containing the signing certificate.
Certificate file password
Password needed to decrypt the certificate file.
Certificate
Certificate in the windows keystore.