cn.vlabs.umt.ui.servlet.PCookie.java Source code

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Here is the source code for cn.vlabs.umt.ui.servlet.PCookie.java

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/*
 * Copyright (c) 2008-2013 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
 *
 * 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. 
 *
 */
package cn.vlabs.umt.ui.servlet;

import java.io.UnsupportedEncodingException;

import org.apache.commons.lang.StringUtils;

import cn.vlabs.duckling.common.crypto.HexUtil;

/**
 * ?Cookie, Cookie
 * 
 * @author xiejj@cnic.cn
 * 
 * @creation Dec 3, 2009 5:03:40 PM
 */
public class PCookie {
    private UMTCredential keys;

    public PCookie(UMTCredential cred) {
        this.keys = cred;
    }

    public String encrypt(String message) {
        if (message != null) {
            try {
                byte[] encrypted = keys.encrypt(message.getBytes("UTF-8"));
                return HexUtil.toHexString(encrypted);
            } catch (UnsupportedEncodingException e) {
            }
        }
        return null;
    }

    public String decrypt(String str) {
        if (StringUtils.isNotBlank(str)) {
            byte[] encrypted = HexUtil.toBytes(str);
            byte[] decrypted = keys.decrypt(encrypted);
            try {
                if (decrypted != null) {
                    return new String(decrypted, "UTF-8");
                }
            } catch (UnsupportedEncodingException e) {
            }
        }
        return null;
    }
}