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This project defines the Java interfaces and classes for a digital notary.
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/************************************************************************
 * Copyright (c) Crater Dog Technologies(TM).  All Rights Reserved.     *
 ************************************************************************
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.        *
 *                                                                      *
 * This code is free software; you can redistribute it and/or modify it *
 * under the terms of The MIT License (MIT), as published by the Open   *
 * Source Initiative. (See http://opensource.org/licenses/MIT)          *
 ************************************************************************/
package bali.notary;

import java.net.URI;
import java.util.Map;


/**
 * This interface defines the methods that must be implemented by all based digital notaries.
 *
 * @author Derk Norton
 */
public interface Notarization {

    /**
     * This method generates a new notary key consisting of an asymmetric (public/private) key pair
     * based on the algorithm implemented by the specific notary implementation.
     *
     * @param passphrase The secret pass phrase used to unlock the private key.
     * @return The newly generated notary key.
     */
    NotaryKey generateKey(char[] passphrase);

    /**
     * This method enables the private notary key using the pass phrase
     * that was used to generate the notary key.
     *
     * @param notaryKey The notary key to be enabled.
     * @param passphrase The pass phrase used to generate the notary key.
     * @return Whether or not the notary key was successfully enabled.
     */
    boolean enableKey(NotaryKey notaryKey, char[] passphrase);

    /**
     * This method disables the private notary key so that it cannot be used
     * to sign or decrypt documents.
     *
     * @param notaryKey The notary key to be disabled.
     */
    void disableKey(NotaryKey notaryKey);

    /**
     * This method renews an existing notary key.
     *
     * @param key The notary key to be renewed.
     * @param passphrase The secret pass phrase used to unlock the private key.
     * @return The newly generated notary key.
     */
    NotaryKey renewKey(NotaryKey key, char[] passphrase);

    /**
     * This method generates a notary seal from the specified document using the specified
     * notary key.
     *
     * @param  The type of document to be notarized.
     * @param document The document to be notarized.
     * @param notaryKey The notary key used to notarize the document.
     * @return The notarized document.
     */
     NotarizedDocument notarizeDocument(D document, NotaryKey notaryKey);

    /**
     * This method uses the specified public verification key to verify that the specified
     * digital seal is valid for the specified document.
     *
     * @param document The notarized document to be verified.
     * @param certificate The verification certificate of the notary that signed the document.
     * @param errors A map containing any errors that were found.
     */
    void validateDocument(NotarizedDocument document, Certificate certificate, Map errors);

    /**
     * This method generates a new citation using the document identification attributes and
     * notarized document.
     *
     * @param reference A reference to the cited document.
     * @param document The notarized document being cited.
     * @return A new citation referring to the document.
     */
    DocumentCitation generateCitation(URI reference, NotarizedDocument document);

    /**
     * This method checks to see if the specified citation is valid.
     *
     * @param document The notarized document referenced by the citation.
     * @param citation The citation to be validated.
     * @param errors A map containing any errors that were found.
     */
    void validateCitation(NotarizedDocument document, DocumentCitation citation, Map errors);

    /**
     * This method checks to see if there are any errors and throws a validation exception
     * containing the errors if there are.
     *
     * @param messageTag The message resource tag for the validation exception.
     * @param errors The map of errors (and empty map means no errors).
     * @throws ValidationException There were errors in the errors map.
     */
    void throwExceptionOnErrors(String messageTag, Map errors) throws ValidationException;

}