com.lowagie.text.pdf.TSAClient Maven / Gradle / Ivy
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/*
* $Id: TSAClient.java 3959 2009-06-09 08:31:05Z blowagie $
*
* Copyright 2009 Martin Brunecky
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999-2005 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2009 by Martin Brunecky. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
/**
* Time Stamp Authority client (caller) interface.
*
* Interface used by the PdfPKCS7 digital signature builder to call
* Time Stamp Authority providing RFC 3161 compliant time stamp token.
* @author Martin Brunecky, 07/17/2007
* @since 2.1.6
*/
public interface TSAClient {
/**
* Get the time stamp token size estimate.
* Implementation must return value large enough to accomodate the entire token
* returned by getTimeStampToken() _prior_ to actual getTimeStampToken() call.
* @return an estimate of the token size
*/
public int getTokenSizeEstimate();
/**
* Get RFC 3161 timeStampToken.
* Method may return null indicating that timestamp should be skipped.
* @param caller PdfPKCS7 - calling PdfPKCS7 instance (in case caller needs it)
* @param imprint byte[] - data imprint to be time-stamped
* @return byte[] - encoded, TSA signed data of the timeStampToken
* @throws Exception - TSA request failed
*/
public byte[] getTimeStampToken(PdfPKCS7 caller, byte[] imprint) throws Exception;
}