sign
Applies an invisible digital signature to a PDF document. An invisible signature adds cryptographic proof of authenticity without any visual representation on the document pages. The signature can be verified in PDF viewers that support digital signatures.
Parameters
input Path
The path to the input PDF file.
output Path
The path where the signed PDF will be saved.
options
The digital signature options including certificate and metadata.
Throws
Thrown when , , or is null.
Argument Exception
Thrown when no certificate is provided in the options.
Sdk Exception
Thrown when the signing operation fails.