js与java使用AES加密算法实现前后端加密解密

AES加密算法入门：https://blog.csdn.net/IndexMan/article/details/87284833

第三方crypto.js下载地址：https://download.csdn.net/download/indexman/10957355

 

项目组对前端发送的关键请求参数有安全要求，不能是明文的。这就涉及到前端加密，后端解密工作。

 

首先是前端

F12查看运行结果

 

 

再看后端

package com.laoxu.springboot.util;

import org.springframework.util.StringUtils;
import sun.misc.BASE64Decoder;

import javax.crypto.*;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.nio.charset.Charset;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
import java.util.UUID;

/**
 * AES工具类
 *
 * @author xusucheng
 * @create 2019-02-13
 **/
public class AESUtil {
    private static String iv = "0123456789ABCDEF";//偏移量字符串必须是16位 当模式是CBC的时候必须设置偏移量
    private static String Algorithm = "AES";
    private static String AlgorithmProvider = "AES/ECB/PKCS5Padding"; // 算法/模式/补码方式

    public static byte[] generatorKey() throws NoSuchAlgorithmException {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(Algorithm);
        keyGenerator.init(256);//默认128，获得无政策权限后可为192或256
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    }

    public static IvParameterSpec getIv() throws UnsupportedEncodingException {
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes("utf-8"));
        System.out.println("偏移量："+byteToHexString(ivParameterSpec.getIV()));
        return ivParameterSpec;
    }

    public static byte[] encrypt(String src, byte[] key) throws NoSuchAlgorithmException, NoSuchPaddingException,
            InvalidKeyException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException, InvalidAlgorithmParameterException {
        SecretKey secretKey = new SecretKeySpec(key, Algorithm);
        //IvParameterSpec ivParameterSpec = getIv();
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] cipherBytes = cipher.doFinal(src.getBytes(Charset.forName("utf-8")));
        return cipherBytes;
    }

    public static byte[] decrypt(String src, byte[] key) throws Exception {
        SecretKey secretKey = new SecretKeySpec(key, Algorithm);

        //IvParameterSpec ivParameterSpec = getIv();
        Cipher cipher = Cipher.getInstance(AlgorithmProvider);
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] hexBytes = hexStringToBytes(src);
        byte[] plainBytes = cipher.doFinal(hexBytes);
        return plainBytes;
    }

    /**
     * 将byte转换为16进制字符串
     * @param src
     * @return
     */
    public static String byteToHexString(byte[] src) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < src.length; i++) {
            int v = src[i] & 0xff;
            String hv = Integer.toHexString(v);
            if (hv.length() < 2) {
                sb.append("0");
            }
            sb.append(hv);
        }
        return sb.toString();
    }

    /**
     * 将16进制字符串装换为byte数组
     * @param hexString
     * @return
     */
    public static byte[] hexStringToBytes(String hexString) {
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] b = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            b[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return b;
    }

    private static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }

    public static void main(String[] args) {
        try {
            // byte key[] = generatorKey();
            // 密钥必须是16的倍数
            byte key[] = "782466a7dada1345".getBytes("utf-8");//hexStringToBytes("0123456789ABCDEF");
            String src = "laoxu123";
            System.out.println("密钥:"+byteToHexString(key));
            System.out.println("原字符串:"+src);

            String enc = byteToHexString(encrypt(src, key));
            System.out.println("加密："+enc);
            System.out.println("解密："+new String(decrypt(enc, key), "utf-8"));
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

 

执行结果：