org.apache.pdfbox.examples.signature

Class CreateEmbeddedTimeStamp

java.lang.Object

org.apache.pdfbox.examples.signature.CreateEmbeddedTimeStamp

public class CreateEmbeddedTimeStamp
extends Object

An example for timestamp-signing a PDF for PADeS-Specification. The document will only be changed in its existing signature by a signed timestamp (A timestamp and the Hash-Value of the document are signed by a Time Stamp Authority (TSA)). This method only changes the unsigned parameters of a signature, so that it is kept valid. Use case: sign offline to avoid zero-day attacks against the signing machine. Once the signature is there and the pdf is transferred to a network connected machine, one is likely to want to add a timestamp. (Ralf Hauser)

Author:

Alexis Suter

Constructor Summary

Constructors

Constructor and Description
CreateEmbeddedTimeStamp(String tsaUrl)

Method Summary

Modifier and Type	Method and Description
void	embedTimeStamp(File file) Embeds the given PDF file with signed timestamp(s).
void	embedTimeStamp(File inFile, File outFile) Embeds signed timestamp(s) into existing signatures of the given document
static void	main(String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CreateEmbeddedTimeStamp

public CreateEmbeddedTimeStamp(String tsaUrl)

Method Detail

embedTimeStamp

public void embedTimeStamp(File file)
                    throws IOException

Embeds the given PDF file with signed timestamp(s). Alters the original file on disk.

Parameters:

file - the PDF file to sign and to overwrite

Throws:

IOException

embedTimeStamp

public void embedTimeStamp(File inFile,
                           File outFile)
                    throws IOException

Embeds signed timestamp(s) into existing signatures of the given document

Parameters:

inFile - The pdf file possibly containing signatures

outFile - Where the changed document will be saved

Throws:

IOException

main

public static void main(String[] args)
                 throws IOException

Throws:

IOException