Java Security filterMechs(String[] mechs, int[] policies, Map props)

Description

Given a list of mechanisms and their characteristics, select the subset that conforms to the policies defined in props.

License

Open Source License

Declaration

public static String[] filterMechs(String[] mechs, int[] policies,
        Map props)

Method Source Code

//package com.java2s;
/**//from w w w .  jav a  2s . c  o  m
 * $RCSfile$
 * $Revision: $
 * $Date: $
 *
 * Copyright (C) 2004-2008 Jive Software. All rights reserved.
 *
 * Licensed 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.
 */

import javax.security.sasl.Sasl;
import java.util.Map;

public class Main {
    public final static int NOPLAINTEXT = 0x0001;
    public final static int NOACTIVE = 0x0002;
    public final static int NODICTIONARY = 0x0004;
    public final static int FORWARD_SECRECY = 0x0008;
    public final static int NOANONYMOUS = 0x0010;
    public final static int PASS_CREDENTIALS = 0x0200;

    /**
     * Given a list of mechanisms and their characteristics, select the
     * subset that conforms to the policies defined in props.
     * Useful for SaslXXXFactory.getMechanismNames(props) implementations.
     *
     */
    public static String[] filterMechs(String[] mechs, int[] policies,
            Map props) {
        if (props == null) {
            return mechs.clone();
        }

        boolean[] passed = new boolean[mechs.length];
        int count = 0;
        for (int i = 0; i < mechs.length; i++) {
            if (passed[i] = checkPolicy(policies[i], props)) {
                ++count;
            }
        }
        String[] answer = new String[count];
        for (int i = 0, j = 0; i < mechs.length; i++) {
            if (passed[i]) {
                answer[j++] = mechs[i];
            }
        }

        return answer;
    }

    /**
     * Determines whether a mechanism's characteristics, as defined in flags,
     * fits the security policy properties found in props.
     * @param flags The mechanism's security characteristics
     * @param props The security policy properties to check
     * @return true if passes; false if fails
     */
    public static boolean checkPolicy(int flags, Map props) {
        if (props == null) {
            return true;
        }

        if ("true".equalsIgnoreCase((String) props
                .get(Sasl.POLICY_NOPLAINTEXT))
                && (flags & NOPLAINTEXT) == 0) {
            return false;
        }
        if ("true".equalsIgnoreCase((String) props
                .get(Sasl.POLICY_NOACTIVE)) && (flags & NOACTIVE) == 0) {
            return false;
        }
        if ("true".equalsIgnoreCase((String) props
                .get(Sasl.POLICY_NODICTIONARY))
                && (flags & NODICTIONARY) == 0) {
            return false;
        }
        if ("true".equalsIgnoreCase((String) props
                .get(Sasl.POLICY_NOANONYMOUS))
                && (flags & NOANONYMOUS) == 0) {
            return false;
        }
        if ("true".equalsIgnoreCase((String) props
                .get(Sasl.POLICY_FORWARD_SECRECY))
                && (flags & FORWARD_SECRECY) == 0) {
            return false;
        }
        if ("true".equalsIgnoreCase((String) props
                .get(Sasl.POLICY_PASS_CREDENTIALS))
                && (flags & PASS_CREDENTIALS) == 0) {
            return false;
        }

        return true;
    }
}

Java Security filterMechs(String[] mechs, int[] policies, Map props)

Description

License

Declaration

Method Source Code

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