org.joyqueue.toolkit.security.Encrypt Maven / Gradle / Ivy

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/**
 * Copyright 2019 The JoyQueue Authors.
 *
 * 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 org.joyqueue.toolkit.security;

import com.google.common.base.Charsets;

import java.nio.charset.Charset;
import java.security.GeneralSecurityException;

/**
 * 加密工具
 */
public class Encrypt {

    public static final String DEFAULT_KEY = "www.jd.com";

    /**
     * 加密
     *
     * @param source    数据源
     * @param key       密匙
     * @param encryptor 加密器
     * @return 加密后的数据
     */
    public static String encrypt(final String source, final String key, final Encryptor encryptor) throws
            GeneralSecurityException {
        return encrypt(source, key, encryptor, Charsets.UTF_8);
    }

    /**
     * 加密
     *
     * @param source    数据源
     * @param key       密匙
     * @param encryptor 加密器
     * @param charset   字符集
     * @return 加密后的数据
     */
    public static String encrypt(final String source, final String key, final Encryptor encryptor,
            final Charset charset) throws GeneralSecurityException {
        if (source == null) {
            return "";
        }
        if (encryptor == null) {
            return source;
        }
        byte[] sources;
        byte[] keys = null;
        if (charset == null) {
            sources = source.getBytes();
            if (key != null) {
                keys = key.getBytes();
            }
        } else {
            sources = source.getBytes(charset);
            if (key != null) {
                keys = key.getBytes(charset);
            }
        }
        return Hex.encode(encryptor.encrypt(sources, keys));
    }

    /**
     * 解密
     *
     * @param source    数据源
     * @param key       密匙
     * @param decryptor 解密器
     * @return 解密后的数据
     */
    public static String decrypt(final String source, final String key, final Decryptor decryptor) throws
            GeneralSecurityException {
        return decrypt(source, key, decryptor, Charsets.UTF_8);
    }

    /**
     * 解密
     *
     * @param source    数据源
     * @param key       密匙
     * @param decryptor 解密器
     * @param charset   字符集
     * @return 解密后的数据
     */
    public static String decrypt(final String source, final String key, final Decryptor decryptor,
            final Charset charset) throws GeneralSecurityException {
        if (source == null) {
            return "";
        }
        if (decryptor == null) {
            return source;
        }
        byte[] sources;
        byte[] keys = null;
        if (charset == null) {
            sources = Hex.decode(source);
            if (key != null) {
                keys = key.getBytes();
            }
            return new String(decryptor.decrypt(sources, keys));
        } else {
            sources = Hex.decode(source);
            if (key != null) {
                keys = key.getBytes(charset);
            }
            return new String(decryptor.decrypt(sources, keys), charset);
        }
    }
}