AES加密工具类

//后端
package cn.keking.utils;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;

import cn.keking.config.WebConfig;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.binary.Base64;
@Slf4j
public class SecretUtils {
    /***
     * key和iv值可以随机生成
     */
    private static String KEY;

    private static String IV;

    static {
        WebConfig.DesParams desParams = SpringContextUtil.getContext().getBean(WebConfig.DesParams.class);
        KEY = desParams.getKey();
        IV = desParams.getIv();
    }

    /***
     * 加密
     * @param  data 要加密的数据
     * @return encrypt
     */
    public static String encrypt(String data){
        return encrypt(data, KEY, IV);
    }

    /***
     * param data 需要解密的数据
     * 调用desEncrypt（）方法
     */
    public static String decrypt(String data){
        return decrypt(data, KEY, IV);
    }

    /**
     * 加密方法
     * @param data  要加密的数据
     * @param key 加密key
     * @param iv 加密iv
     * @return 加密的结果
     */
    private static String encrypt(String data, String key, String iv){
        try {
            //"算法/模式/补码方式"NoPadding PkcsPadding
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();

            byte[] dataBytes = data.getBytes(StandardCharsets.UTF_8);
            int plaintextLength = dataBytes.length;
            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
            }
            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8));

            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);

            return new Base64().encodeToString(encrypted);

        } catch (Exception e) {
            log.error(e.getMessage());
            return null;
        }
    }

    /**
     * 解密方法
     * @param data 要解密的数据
     * @param key  解密key
     * @param iv 解密iv
     * @return 解密的结果
     */
    private static String decrypt(String data, String key, String iv){
        try {
            data = data.replaceAll(" ", "+").replaceAll("\n", "");
            byte[] encrypted1 = new Base64().decode(data);
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
            IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8));
            cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
            byte[] original = cipher.doFinal(encrypted1);
            return new String(original, StandardCharsets.UTF_8).trim();
        } catch (Exception e) {
            log.error(e.getMessage());
            return null;
        }
    }
}

//前端
<script src="js/crypto-js.js"></script>
<script type="text/javascript">
/**
     * 对称加密
     * @param {string} message 待加密的明文
     * @param {string} key 加密所用的密钥
     * @return {string} 返回密文字符串
     */
        // 默认的 KEY 与 iv 如果没有给
    const KEY = CryptoJS.enc.Utf8.parse('T8lL1Nx8Z9X5MFEZ')
    const IV = CryptoJS.enc.Utf8.parse('yourivcodexxxxxx')
    function encrypt(message,key) {
        if (key==null||key==""){
            key = KEY;
        }
        const srcs = CryptoJS.enc.Utf8.parse(message)
        const encrypted = CryptoJS.AES.encrypt(srcs, key, {
            iv: IV,
            mode: CryptoJS.mode.CBC,
            padding: CryptoJS.pad.ZeroPadding
        })
        const res = CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
        return res;
    }
   function decrypt(message, keyStr) {
        let key = KEY
        let iv = IV

        if (keyStr) {
            key = CryptoJS.enc.Utf8.parse(keyStr)
        }

        const base64 = CryptoJS.enc.Base64.parse(message)
        const src = CryptoJS.enc.Base64.stringify(base64)

        const decrypt = CryptoJS.AES.decrypt(src, key, {
            iv: iv,
            mode: CryptoJS.mode.CBC,
            padding: CryptoJS.pad.ZeroPadding
        })

        return CryptoJS.enc.Utf8.stringify(decrypt)
    }
</script>