com.itextpdf.signatures

Class ExternalBlankSignatureContainer

java.lang.Object

com.itextpdf.signatures.ExternalBlankSignatureContainer

All Implemented Interfaces:

IExternalSignatureContainer

public class ExternalBlankSignatureContainer
extends Object
implements IExternalSignatureContainer

Produces a blank (or empty) signature. Useful for deferred signing with MakeSignature.signExternalContainer().

Author:

Paulo Soares

Constructor Summary

Constructors

Constructor and Description
ExternalBlankSignatureContainer(PdfDictionary sigDic) Creates an ExternalBlankSignatureContainer.
ExternalBlankSignatureContainer(PdfName filter, PdfName subFilter) Creates an ExternalBlankSignatureContainer.

Method Summary

Modifier and Type	Method and Description
void	modifySigningDictionary(PdfDictionary signDic) Modifies the signature dictionary to suit the container.
byte[]	sign(InputStream data) Produces the container with the signature.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExternalBlankSignatureContainer

public ExternalBlankSignatureContainer(PdfDictionary sigDic)

Creates an ExternalBlankSignatureContainer.

Parameters:

sigDic - PdfDictionary containing signature iformation. /SubFilter and /Filter aren't set in this constructor.

ExternalBlankSignatureContainer

public ExternalBlankSignatureContainer(PdfName filter,
                                       PdfName subFilter)

Creates an ExternalBlankSignatureContainer. This constructor will create the PdfDictionary for the signature information and will insert the /Filter and /SubFilter values into this dictionary.

Parameters:

filter - PdfName of the signature handler to use when validating this signature

subFilter - PdfName that describes the encoding of the signature

Method Detail

sign

public byte[] sign(InputStream data)
            throws GeneralSecurityException

Description copied from interface: IExternalSignatureContainer

Produces the container with the signature.

Specified by:

sign in interface IExternalSignatureContainer

Parameters:

data - the data to sign

Returns:

a container with the signature and other objects, like CRL and OCSP. The container will generally be a PKCS7 one.

Throws:

GeneralSecurityException - the general security exception

modifySigningDictionary

public void modifySigningDictionary(PdfDictionary signDic)

Description copied from interface: IExternalSignatureContainer

Modifies the signature dictionary to suit the container. At least the keys PdfName.Filter and PdfName.SubFilter will have to be set.

Specified by:

modifySigningDictionary in interface IExternalSignatureContainer

Parameters:

signDic - the signature dictionary