aes加解密

小程序开发时常用aes解密 解密微信信息获取手机号  昵称
package com.chiefclouds.crm1664.utils;

import org.apache.tomcat.util.codec.binary.Base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.*;
import java.security.spec.InvalidParameterSpecException;

/**
 * AES-128-CBC 加密方式
 * 注：
 * AES-128-CBC可以自己定义“密钥”和“偏移量“。
 * AES-128是jdk自动生成的“密钥”。
 */
public class AesCbcUtil {

    private static Logger logger = LoggerFactory.getLogger(AesCbcUtil.class);

    static{
        try{
            Security.addProvider(new BouncyCastleProvider());
        }catch(Exception e){
            e.printStackTrace();
        }
    }

    /**
     * AES解密
     *
     * @param data           //密文，被加密的数据
     * @param key            //秘钥
     * @param iv             //偏移量
     * @param encodingFormat //解密后的结果需要进行的编码
     * @return
     * @throws Exception
     */
    public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception {
//        initialize();
        //被加密的数据
        byte[] dataByte = new Base64().decode(data);
        //加密秘钥
        byte[] keyByte =  new Base64().decode(key);
        //偏移量
        byte[] ivByte =  new Base64().decode(iv);

        try {
            // Provider BC = new BouncyCastleProvider();
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding","BC");

            SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");

            AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
            parameters.init(new IvParameterSpec(ivByte));

            cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
            byte[] resultByte = cipher.doFinal(dataByte);
            if (null != resultByte && resultByte.length > 0) {
                String result = new String(resultByte, encodingFormat);
                return result;
            }
            return null;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        } catch (InvalidParameterSpecException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        } catch (InvalidKeyException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        } catch (BadPaddingException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            logger.error(e.getMessage(), e);
        }

        return null;
    }

}
使用：

String result = AesCbcUtil.decrypt(loginInfo.getEncryptedData(), loginInfo.getSessionKey(), loginInfo.getIv(), "UTF-8");
JSONObject json = JSONObject.parseObject(result);
System.err.println("解密信息= " + json);