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This module contains the Metro runtime code.
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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.xml.security.encryption;

/**
 * The EncryptedKey element is used to transport encryption keys
 * from the originator to a known recipient(s). It may be used as a stand-alone
 * XML document, be placed within an application document, or appear inside an
 * EncryptedData element as a child of a ds:KeyInfo
 * element. The key value is always encrypted to the recipient(s). When
 * EncryptedKey is decrypted the resulting octets are made
 * available to the EncryptionMethod algorithm without any
 * additional processing.
 * 
 * Its schema definition is as follows:
 * 

 * <element name='EncryptedKey' type='xenc:EncryptedKeyType'/>
 * <complexType name='EncryptedKeyType'>
 *     <complexContent>
 *         <extension base='xenc:EncryptedType'>
 *             <sequence>
 *                 <element ref='xenc:ReferenceList' minOccurs='0'/>
 *                 <element name='CarriedKeyName' type='string' minOccurs='0'/>
 *             </sequence>
 *             <attribute name='Recipient' type='string' use='optional'/>
 *         </extension>
 *     </complexContent>
 * </complexType>
 * 
 *
 * @author Axl Mattheus
 */
public interface EncryptedKey extends EncryptedType {
    
    /**
     * Returns a hint as to which recipient this encrypted key value is intended for.
     *
     * @return the recipient of the EncryptedKey.
     */
    String getRecipient();

    /**
     * Sets the recipient for this EncryptedKey.
     *
     * @param recipient the recipient for this EncryptedKey.
     */
    void setRecipient(String recipient);

    /**
     * Returns pointers to data and keys encrypted using this key. The reference
     * list may contain multiple references to EncryptedKey and
     * EncryptedData elements. This is done using
     * KeyReference and DataReference elements
     * respectively.
     *
     * @return an Iterator over all the ReferenceLists
     *   contained in this EncryptedKey.
     */
    ReferenceList getReferenceList();

    /**
     * Sets the ReferenceList to the EncryptedKey.
     *
     * @param list a list of pointers to data elements encrypted using this key.
     */
    void setReferenceList(ReferenceList list);

    /**
     * Returns a user readable name with the key value. This may then be used to
     * reference the key using the ds:KeyName element within
     * ds:KeyInfo. The same CarriedKeyName label,
     * unlike an ID type, may occur multiple times within a single document. The
     * value of the key is to be the same in all EncryptedKey
     * elements identified with the same CarriedKeyName label
     * within a single XML document.
     * 

     * Note that because whitespace is significant in the value of
     * the ds:KeyName element, whitespace is also significant in
     * the value of the CarriedKeyName element.
     *
     * @return over all the carried names contained in
     *   this EncryptedKey.
     */
    String getCarriedName();

    /**
     * Sets the carried name.
     *
     * @param name the carried name.
     */
    void setCarriedName(String name);
}