open-JSD-7706/src/main/java/com/fr/plugin/j7706/sso/utils/AESUtil.java

package com.fr.plugin.j7706.sso.utils;

import com.fanruan.api.log.LogKit;
import com.fr.third.org.apache.commons.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.Security;

public class AESUtil {
	/**
	 * 密钥算法
	 */
	private static final String KEY_ALGORITHM = "AES";
	
	/**
	 * 加密/解密算法 / 工作模式 / 填充方式
	 * Java 6支持PKCS5Padding填充方式
	 * Bouncy Castle支持PKCS7Padding填充方式
	 */
	private static final String CIPHER_ALGORITHM = "AES/CBC/PKCS7Padding";
	
	/**
	 * 偏移量，只有CBC模式才需要
	 */
	private final static String ivParameter = "tsx&8D#23_emp~86";
	
	/**
	 * AES要求密钥长度为128位或192位或256位，java默认限制AES密钥长度最多128位
	 */
	public static String sKey="" ;
	
	/**
	 * 编码格式
	 */
	public static final String ENCODING = "utf-8";
	
	
	static {
		//如果是PKCS7Padding填充方式，则必须加上下面这行
		Security.addProvider(new BouncyCastleProvider());
	}
	
	/**
	 * AES加密
	 * @param source	源字符串
	 * @param key	密钥
	 * @return	加密后的密文
	 * @throws Exception
	 */
	public static String encrypt(String source, String key) {
		try {
			byte[] sourceBytes = source.getBytes(ENCODING);
			byte[] keyBytes = key.getBytes(ENCODING);
			Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM, "BC");  
			IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes(ENCODING));
			cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, KEY_ALGORITHM),iv);  
			byte[] decrypted = cipher.doFinal(sourceBytes);
			return Base64.encodeBase64String(decrypted);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	/**
	 * AES解密
	 * @param encryptStr	加密后的密文
	 * @param key	密钥
	 * @return	源字符串
	 * @throws Exception
	 */
	public static String decrypt(String encryptStr, String key) {
		try {
			byte[] sourceBytes = Base64.decodeBase64(encryptStr);
			byte[] keyBytes = key.getBytes(ENCODING);
			Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM, "BC");  
			IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes(ENCODING));
			cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(keyBytes, KEY_ALGORITHM), iv);
			byte[] decoded = cipher.doFinal(sourceBytes);  
			return new String(decoded, ENCODING);
		} catch (Exception e) {
			LogKit.error(e.getMessage(), e);
        }
        return null;
    }
}