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ISignatureHandler Interface

An interface for SignatureHandler. SignatureHandler instances are responsible for defining the digest and cipher algorithms to sign and/or verify a PDF document. SignatureHandlers are added to PDFDoc instances by calling the PDFDoc.AddSignatureHandler method.

Namespace:  pdftron.SDF
Assembly:  pdftron (in pdftron.dll) Version:
public interface ISignatureHandler

The ISignatureHandler type exposes the following members.

Public methodAppendData
Adds data to be signed. This data will be the raw serialized byte buffer as the PDF is being saved to any stream.
Public methodCreateSignature
Calculates the actual signature using client implemented signing methods. The returned value (byte array) will be written as the /Contents entry in the signature dictionary.
Public methodGetName
Gets the name of this SignatureHandler. The name of the SignatureHandler is what identifies this SignatureHandler from all others. This name is also added to the PDF as the value of /Filter entry in the signature dictionary.
Public methodReset
Resets any data appending and signature calculations done so far. This method should allow PDFNet to restart the whole signature calculation process. It is important that when this method is invoked, any data processed with the AppendData method should be discarded.
See Also