de.intarsys.pdf.crypt.ISecurityHandler Maven / Gradle / Ivy
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/*
* Copyright (c) 2007, intarsys consulting GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of intarsys nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package de.intarsys.pdf.crypt;
import de.intarsys.pdf.st.STDocument;
/**
* The security handler as defined in the PDF spec. This is the exchangeable
* behavior in the PDF security spec.
*
* The {@link ISystemSecurityHandler} is asked for de/encryption, which is done
* by himself for the defined standard encryptions, using {@link ICryptHandler}
* instances for RC4 and AES. These {@link ICryptHandler} instances are
* initialized using the encryption key provided by this
* {@link ISecurityHandler}.
*
* With /V 4 encryption, the application may ask for "transparent"
* de/encryption, in which case it is forwarded to the installed
* {@link ISecurityHandler} itself.
*/
public interface ISecurityHandler extends ICryptHandler {
/**
* Associate this {@link ISecurityHandler} with a {@link STDocument}.
*
* The {@link ISecurityHandler} should add all its private information to
* the document structure, in particular to the /Encrypt dictionary.
*
* @param doc
*/
void attach(STDocument doc) throws COSSecurityException;
/**
* Perform an authentication.
*
* @throws COSSecurityException
*/
void authenticate() throws COSSecurityException;
/**
* Disassociate this {@link ISecurityHandler} from {@link STDocument}.
*
* The {@link ISecurityHandler} should remove all its private information
* from the document structure, in particular from the /Encrypt dictionary.
*
* @param doc
*/
void detach(STDocument doc) throws COSSecurityException;
/**
* The crypt key created by this {@link ISecurityHandler}. The crypt key is
* used by the {@link ISystemSecurityHandler} (or the {@link ICryptHandler}
* to initialize its cryptographic functions.
*
* The crypt key is valid after the authentication.
*
* @return The crypt key created by this {@link ISecurityHandler}.
*/
byte[] getCryptKey();
/**
* Initialize this {@link ISecurityHandler} with a {@link STDocument}.
*
* The {@link ISecurityHandler} should initialize its state from the
* information in the document structure, in particular from the /Encrypt
* dictionary.
*
* @param doc
* @throws COSSecurityException
*/
void initialize(STDocument doc) throws COSSecurityException;
/**
* The associated {@link STDocument}.
*
* @return The associated {@link STDocument}.
*/
STDocument stGetDoc();
}