JavaScript前端和Java後端的AES加密和解密

在實際開發專案中，有些資料在前後端的傳輸過程中需要進行加密，那就需要保證前端和後端的加解密需要統一。這裡給大家簡單演示AES在JavaScript前端和Java後端是如何實現加密和解密的。

直接上程式碼：

java端：

package com.lin.utils;

import java.math.BigInteger;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;

import sun.misc.BASE64Decoder;

/**
 * AES的加密和解密
 * @author libo
 */
public class Aes {
    //金鑰 (需要前端和後端保持一致)
    private static final String KEY = "abcdefgabcdefg12";  
    //演算法
    private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";
    
    /** 
     * aes解密 
     * @param encrypt   內容 
     * @return 
     * @throws Exception 
     */  
    public static String aesDecrypt(String encrypt) {  
        try {
            return aesDecrypt(encrypt, KEY);
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }  
    }  
      
    /** 
     * aes加密 
     * @param content 
     * @return 
     * @throws Exception 
     */  
    public static String aesEncrypt(String content) {  
        try {
            return aesEncrypt(content, KEY);
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }  
    }  
  
    /** 
     * 將byte[]轉為各種進位制的字串 
     * @param bytes byte[] 
     * @param radix 可以轉換進位制的範圍，從Character.MIN_RADIX到Character.MAX_RADIX，超出範圍後變為10進位制 
     * @return 轉換後的字串 
     */  
    public static String binary(byte[] bytes, int radix){  
        return new BigInteger(1, bytes).toString(radix);// 這裡的1代表正數  
    }  
  
    /** 
     * base 64 encode 
     * @param bytes 待編碼的byte[] 
     * @return 編碼後的base 64 code 
     */  
    public static String base64Encode(byte[] bytes){  
        return Base64.encodeBase64String(bytes);  
    }  
  
    /** 
     * base 64 decode 
     * @param base64Code 待解碼的base 64 code 
     * @return 解碼後的byte[] 
     * @throws Exception 
     */  
    public static byte[] base64Decode(String base64Code) throws Exception{  
        return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);  
    }  
  
      
    /** 
     * AES加密 
     * @param content 待加密的內容 
     * @param encryptKey 加密金鑰 
     * @return 加密後的byte[] 
     * @throws Exception 
     */  
    public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {  
        KeyGenerator kgen = KeyGenerator.getInstance("AES");  
        kgen.init(128);  
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);  
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));  
  
        return cipher.doFinal(content.getBytes("utf-8"));  
    }  
  
  
    /** 
     * AES加密為base 64 code 
     * @param content 待加密的內容 
     * @param encryptKey 加密金鑰 
     * @return 加密後的base 64 code 
     * @throws Exception 
     */  
    public static String aesEncrypt(String content, String encryptKey) throws Exception {  
        return base64Encode(aesEncryptToBytes(content, encryptKey));  
    }  
  
    /** 
     * AES解密 
     * @param encryptBytes 待解密的byte[] 
     * @param decryptKey 解密金鑰 
     * @return 解密後的String 
     * @throws Exception 
     */  
    public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {  
        KeyGenerator kgen = KeyGenerator.getInstance("AES");  
        kgen.init(128);  
  
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);  
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));  
        byte[] decryptBytes = cipher.doFinal(encryptBytes);  
        return new String(decryptBytes);  
    }  
  
  
    /** 
     * 將base 64 code AES解密 
     * @param encryptStr 待解密的base 64 code 
     * @param decryptKey 解密金鑰 
     * @return 解密後的string 
     * @throws Exception 
     */  
    public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {  
        return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);  
    }  
    
    /**
     * 測試
     */
    public static void main(String[] args) throws Exception {  
        String content = "123";  
        System.out.println("加密前：" + content);  
        System.out.println("加密金鑰和解密金鑰：" + KEY);  
        String encrypt = aesEncrypt(content, KEY);  
        System.out.println("加密後：" + encrypt);  
        String decrypt = aesDecrypt(encrypt, KEY);  
        System.out.println("解密後：" + decrypt);  
    } 
}

<dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
    <version>1.10</version>
</dependency>
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.4</version>
</dependency>

JavaScript前端：

/**
 * 加密（需要先載入lib/aes/aes.min.js檔案）
 * @param word
 * @returns {*}
 */
function encrypt(word){
    var key = CryptoJS.enc.Utf8.parse("abcdefgabcdefg12");
    var srcs = CryptoJS.enc.Utf8.parse(word);
    var encrypted = CryptoJS.AES.encrypt(srcs, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
    return encrypted.toString();
}

/**
 * 解密
 * @param word
 * @returns {*}
 */
function decrypt(word){
    var key = CryptoJS.enc.Utf8.parse("abcdefgabcdefg12");
    var decrypt = CryptoJS.AES.decrypt(word, key, {mode:CryptoJS.mode.ECB,padding: CryptoJS.pad.Pkcs7});
    return CryptoJS.enc.Utf8.stringify(decrypt).toString();
}

需要依賴aes.js檔案：

以下是壓縮後的aes.js檔案

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原文連結 侵刪:https://www.cnblogs.com/libo0125ok/p/7668026.html