Node代码

let crypto = require('crypto');

//偏移量 16位
const iv = "0123456789ABCDEF";
//密钥
const key = "0123456789ABCDEF";


//加密
function encodeAes(word) {
    
    if (!word) {
    
        return ''
    }
    if (typeof word != 'string') {
    
        word = JSON.stringify(word)
    }

    const md5 = crypto.createHash('md5');
    const result = md5.update(key).digest();
    const cipher = crypto.createCipheriv('aes-128-gcm', result, iv);
    const encrypted = cipher.update(word, 'utf8');
    const finalstr = cipher.final();
    const tag = cipher.getAuthTag();
    const res = Buffer.concat([encrypted, finalstr, tag]);
    return res.toString('base64');
}

//解密
function decodeAes(word) {
    
    if (!word) {
    
        return ''
    }
    const md5 = crypto.createHash('md5');
    const result = md5.update(key).digest();
    const decipher = crypto.createDecipheriv('aes-128-gcm', result, iv);
    const b = Buffer.from(word, 'base64')
    decipher.setAuthTag(b.subarray(b.length - 16));
    const str = decipher.update(Buffer.from(b.subarray(0, b.length - 16), 'hex'));
    const fin = decipher.final();
    const decryptedStr = new TextDecoder('utf8').decode(Buffer.concat([str, fin]))
    try {
    
        return JSON.parse(decryptedStr);
    } catch (e) {
    
        return decryptedStr
    }
}


let encodeStr = encodeAes('hello word');
console.log('加密后：' + encodeStr);
let decodeStr = decodeAes(encodeStr);
console.log('解密后：' + decodeStr);

Java代码

import java.security.MessageDigest;

import java.security.Security;

import java.util.Base64;

import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

/**
 * @Description 
 * @Date 13:43 2020/12/8
 **/
public class AesGcmUtil {
    

    
    /**
     * @Description  16位的密钥
     * @Date 13:43 2020/12/8
     **/
    public static final String KEY = "0123456789ABCDEF";

    private static final String IV = "0123456789ABCDEF";

    private static final String ALGORITHMSTR = "AES/GCM/NoPadding";

    private static final String DEFAULT_CODING = "utf-8";

    /**
     * 如果报错java.security.NoSuchProviderException: no such provider: BC，那么需要加上这一段，同时需要bcprov-jdk15on.jar
     */
    static {
    
        Security.addProvider(new BouncyCastleProvider());
    }

    /**
     * @Description 加密
     * @Date 14:25 2020/12/7
     **/
    public static String aesEncrypt(String content) throws Exception {
    
        byte[] input = content.getBytes(DEFAULT_CODING);
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] thedigest = md.digest(KEY.getBytes(DEFAULT_CODING));
        SecretKeySpec skc = new SecretKeySpec(thedigest, "AES");
        IvParameterSpec ivspec = new IvParameterSpec(IV.getBytes(DEFAULT_CODING));
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR, "BC");
        cipher.init(Cipher.ENCRYPT_MODE, skc, ivspec);
        byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
        int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
        ctLength += cipher.doFinal(cipherText, ctLength);
        return Base64.getEncoder().encodeToString(cipherText);
    }


    /**
     * @Description 解密
     * @Date 14:26 2020/12/7
     **/
    public static String aesDecrypt(String tmp) throws Exception {
    
        byte[] keyb = KEY.getBytes(DEFAULT_CODING);
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] thedigest = md.digest(keyb);
        SecretKeySpec skey = new SecretKeySpec(thedigest, "AES");
        IvParameterSpec ivspec = new IvParameterSpec(IV.getBytes(DEFAULT_CODING));
        Cipher dcipher = Cipher.getInstance(ALGORITHMSTR, "BC");
        dcipher.init(Cipher.DECRYPT_MODE, skey, ivspec);
        byte[] clearbyte = dcipher.doFinal(Base64.getDecoder().decode(tmp));
        return new String(clearbyte, DEFAULT_CODING);
    }

    public static void main(String[] args) throws Exception {
    
        String origin = "这是Java端的加密解密";
        String encryptstr = aesEncrypt(origin);
        System.out.println(encryptstr);
        String decryptstr = aesDecrypt(encryptstr);
        System.out.println(decryptstr);

    }


}

$就先说到这$
$在下Apollo$
$一个爱分享Java、生活的小人物，$
$咱们来日方长，有缘江湖再见，告辞！$