See: Description
| Interface | Description | 
|---|---|
| IPassword | 
 External interface used by the PDF library to get possible passwords
 to open a document. 
 | 
| Class | Description | 
|---|---|
| DocumentInfo | 
 This class is a container for the information section of a PDF document. 
 | 
| PDFPassword | 
 Implementation of the IPassword interface that can hold either a single password or a
 list of passwords. 
 | 
| SignatureAppearance | 
 This class provides functionality to customize the appearance of a visible
 signature when a document is signed. 
 | 
| SignatureSettings | 
 This class manages the certificates that are used to verify digital signatures. 
 | 
| SignatureValidity | 
 This class returns information about the validity of a signature within the PDF document. 
 | 
| SigningInformation | 
 Object that holds information necessary to digitally sign a PDF file. 
 | 
| TimestampServer | 
 This class is used to setup a timestamp server to use when applying a digital signature. 
 | 
| Exception | Description | 
|---|---|
| PDFException | 
 General exception thrown when there is any errors reading or
 displaying a PDF file. 
 | 
| PDFPermissionException | 
 Exception thrown when there is any permission error. 
 | 
| PDFSecurityException | 
 Exceptions related to security problems. 
 |