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The Apache WSS4J project provides a Java implementation of the primary security standards for Web Services, namely the OASIS Web Services Security (WS-Security) specifications from the OASIS Web Services Security TC.
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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.ws.security.conversation;

import javax.xml.namespace.QName;

/**
 * Class ConversationConstants
 */
public class ConversationConstants {

    public static final int VERSION_05_02 = 1;
    
    public static final int VERSION_05_12 = 2;
    
    public static final int DEFAULT_VERSION = VERSION_05_02; 
    
    /**
     * WS-SecConv Feb 2005 version
     */
    public static final String WSC_NS_05_02 = "http://schemas.xmlsoap.org/ws/2005/02/sc"; 
    
    /**
     * WS-Sx version
     */
    public static final String WSC_NS_05_12 = 
        "http://docs.oasis-open.org/ws-sx/ws-secureconversation/200512";
    
    /**
     * Token type of DerivedKeyToken
     */
    public static final String TOKEN_TYPE_DERIVED_KEY_TOKEN =  "/dk";
    
    /**
     * Token type of SecurityContextToken
     */
    public static final String TOKEN_TYPE_SECURITY_CONTEXT_TOKEN = "/sct";
    
    /**
     * Field WSC_PREFIX
     */
    public static final String WSC_PREFIX = "wsc";

    /**
     * Field SECURITY_CONTEXT_TOKEN_LN
     */
    public static final String SECURITY_CONTEXT_TOKEN_LN =
            "SecurityContextToken";

    /**
     * Field IDENTIFIER_LN
     */
    public static final String IDENTIFIER_LN = "Identifier";

    /**
     * Field EXPIRES_LN
     */
    public static final String EXPIRES_LN = "Expires";

    /**
     * Field KEYS_LN
     */
    public static final String KEYS_LN = "Keys";

    /**
     * Field SECURITY_TOKEN_REFERENCE_LN
     */
    public static final String SECURITY_TOKEN_REFERENCE_LN =
            "SecurityTokenReference";

    /**
     * Field DERIVED_KEY_TOKEN_LN
     */
    public static final String DERIVED_KEY_TOKEN_LN = "DerivedKeyToken";

    /**
     * Field PROPERTIES_LN
     */
    public static final String PROPERTIES_LN = "Properties";

    /**
     * Field LENGTH_LN
     */
    public static final String LENGTH_LN = "Length";

    /**
     * Field GENERATION_LN
     */
    public static final String GENERATION_LN = "Generation";

    /**
     * Field OFFSET_LN
     */
    public static final String OFFSET_LN = "Offset";

    /**
     * Field LABEL_LN
     */
    public static final String LABEL_LN = "Label";

    /**
     * Field NONCE_LN
     */
    public static final String NONCE_LN = "Nonce";

    public static final int DIRECT_GENERATED = 1;
    public static final int STS_GENERATED = 2;
    public static final int STSREQUEST_TOKEN = 3;
    public static final int INTEROP_SCENE1 = 4;

    public static final String IDENTIFIER = "SCT_Identifier";

    public static final int DK_SIGN = 1;
    public static final int DK_ENCRYPT = 2;
    
    public static final String DEFAULT_LABEL = "WS-SecureConversation";
    
    public static final QName SECURITY_CTX_TOKEN_QNAME_05_02 =
        new QName(
            ConversationConstants.WSC_NS_05_02, 
            ConversationConstants.SECURITY_CONTEXT_TOKEN_LN
        );
    
    public static final QName SECURITY_CTX_TOKEN_QNAME_05_12 =
        new QName(
            ConversationConstants.WSC_NS_05_12, 
            ConversationConstants.SECURITY_CONTEXT_TOKEN_LN
        );

    public static final QName DERIVED_KEY_TOKEN_QNAME_05_02 =
        new QName(
            ConversationConstants.WSC_NS_05_02, 
            ConversationConstants.DERIVED_KEY_TOKEN_LN
        );
    
    public static final QName DERIVED_KEY_TOKEN_QNAME_05_12 =
        new QName(
            ConversationConstants.WSC_NS_05_12, 
            ConversationConstants.DERIVED_KEY_TOKEN_LN
        );
    
    /**
     * Key to hold the map of security context identifiers against the 
     * service epr addresses (service scope) or wsa:Action values (operation 
     * scope).
     */
    public static final String KEY_CONTEXT_MAP = "contextMap";
    
    public interface DerivationAlgorithm {
        public static final String P_SHA_1 = "http://schemas.xmlsoap.org/ws/2005/02/sc/dk/p_sha1";
    }
    
    public static String getWSCNs(int version) throws ConversationException {
        if (VERSION_05_02 == version) {
            return WSC_NS_05_02;
        } else if (VERSION_05_12 == version) {
            return WSC_NS_05_12;
        } else {
            throw new ConversationException("unsupportedSecConvVersion");
        }
    }
    
    public static int getWSTVersion(String ns) throws ConversationException {
        if (WSC_NS_05_02.equals(ns)) {
            return VERSION_05_02;
        } else if (WSC_NS_05_12.equals(ns)) {
            return VERSION_05_12;
        } else {
            throw new ConversationException("unsupportedSecConvVersion");
        }
    }
}