javascript 和 golang 前后端使用 AES 加密传输数据-木庄网络博客

本文摘自网络，作者，侵删。

golang

package crypto

import (
    "bytes"
    "crypto/aes"
    "crypto/cipher"
    "encoding/hex"
    "errors"
    "fmt"
)
//参考文档
//http://www.topgoer.com/%E5%85%B6%E4%BB%96/%E5%8A%A0%E5%AF%86%E8%A7%A3%E5%AF%86/%E5%8A%A0%E5%AF%86%E8%A7%A3%E5%AF%86.html
//高级加密标准（Adevanced Encryption Standard ,AES）

//16,24,32位字符串的话，分别对应AES-128，AES-192，AES-256 加密方法
//key不能泄露
//var PwdKey = []byte("DIS**#KKKDJJSKDI")
var PwdKey = "linkbook1qaz*WSX"

//PKCS7 填充模式
func PKCS7Padding(ciphertext []byte, blockSize int) []byte {
    padding := blockSize - len(ciphertext)%blockSize
    //Repeat()函数的功能是把切片[]byte{byte(padding)}复制padding个，然后合并成新的字节切片返回
    padtext := bytes.Repeat([]byte{byte(padding)}, padding)
    return append(ciphertext, padtext...)
}

//填充的反向操作，删除填充字符串
func PKCS7UnPadding1(origData []byte) ([]byte, error) {
    //获取数据长度
    length := len(origData)
    if length == 0 {
        return nil, errors.New("加密字符串错误！")
    } else {
        //获取填充字符串长度
        unpadding := int(origData[length-1])
        //截取切片，删除填充字节，并且返回明文
        return origData[:(length - unpadding)], nil
    }
}

//实现加密
func AesEcrypt(origData []byte, key []byte) ([]byte, error) {
    //创建加密算法实例
    block, err := aes.NewCipher(key)
    if err != nil {
        return nil, err
    }
    //获取块的大小
    blockSize := block.BlockSize()
    //对数据进行填充，让数据长度满足需求
    origData = PKCS7Padding(origData, blockSize)
    //采用AES加密方法中CBC加密模式
    blocMode := cipher.NewCBCEncrypter(block, key[:blockSize])
    crypted := make([]byte, len(origData))
    //执行加密
    blocMode.CryptBlocks(crypted, origData)
    return crypted, nil
}

//实现解密
func AesDeCrypt(cypted []byte, key []byte) (string, error) {
    //创建加密算法实例
    block, err := aes.NewCipher(key)
    if err != nil {
        return "", err
    }
    //获取块大小
    blockSize := block.BlockSize()
    //创建加密客户端实例
    blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
    origData := make([]byte, len(cypted))
    //这个函数也可以用来解密
    blockMode.CryptBlocks(origData, cypted)
    //去除填充字符串
    origData, err = PKCS7UnPadding1(origData)
    if err != nil {
        return "", err
    }
    return string(origData), err
}

//加密base64
func EnPwdCode(pwdStr string) string {
    pwd := []byte(pwdStr)
    result, err := AesEcrypt(pwd, []byte(PwdKey))
    if err != nil {
        return ""
    }
    return hex.EncodeToString(result)
}

//解密
func DePwdCode(pwd string) string {
    temp, _ := hex.DecodeString(pwd)
    //执行AES解密
    res, _:=AesDeCrypt(temp, []byte(PwdKey))
    return res
}

func main() {

    //aes加密
    destring:=`{"name":"菜鸟教程11","site":"http://www.runoob.com"}`
    deStr := EnPwdCode(destring)
    fmt.Println(deStr) //4f4d74c15e0ad4afb323a17927b1176ecb0c95ecbdf8e776ceb093499e3ff4c45157b007ae7dff1688ac2d2bf9fef28644922a1b3bbc6ef5881cb1ed0dff298a

    //aes解密
    decodeStr := DePwdCode("4f4d74c15e0ad4afb323a17927b1176ecb0c95ecbdf8e776ceb093499e3ff4c45157b007ae7dff1688ac2d2bf9fef28644922a1b3bbc6ef5881cb1ed0dff298a")
    fmt.Println(decodeStr) //{"name":"菜鸟教程11","site":"http://www.runoob.com"}
}

前端javascript的代码

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Title</title>

</head>
<script src="./aes.js"></script>

<body>

  <script>
    // var key1 = "1234567887654321";
    var key1 = "linkbook1qaz*WSX";
    // var plaintText = '"name"="lisi",age=18'; // 明文
    var str = {
      name: "菜鸟教程11",
      site: "http://www.runoob.com"
    }
    var plaintText = JSON.stringify(str)
    console.log(plaintText)
    endata = encodeAes(plaintText)
    //加密
    function encodeAes(plaintTextStr) {
      var key = CryptoJS.enc.Utf8.parse(key1);

      var encryptedData = CryptoJS.AES.encrypt(plaintText, key, {
        iv: key,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
      });

      // console.log("加密前：" + plaintText);
      // console.log("加密后：" + encryptedData);    //Pkcs7:   WoCzvm6eZiM4/bx5o/CzGw==

      // console.log("加密后 base64：" + encryptedData.ciphertext.toString(CryptoJS.enc.Base64));
      encryptedData = encryptedData.ciphertext.toString();
      console.log("加密后-no-hex：" + encryptedData);
      return encryptedData
    }


    // 解密
    endata1 = "46ce4f5bb33896c4c75a24a46c6f16c32991228f40831003b98acffe41fee255f892d68283b8a1b07a4dfd66622b6c50685854e918ac059d5d8e969b3b105c6b";
    decodeAes(endata1)
    function decodeAes(encryptedDataStr) {
      var key = CryptoJS.enc.Utf8.parse(key1);
      var encryptedHexStr = CryptoJS.enc.Hex.parse(encryptedDataStr);
      // console.log("解密前hex：" + encryptedHexStr);
      var encryptedBase64Str = CryptoJS.enc.Base64.stringify(encryptedHexStr);
      // console.log("解密前：" + encryptedBase64Str);

      var decryptedData = CryptoJS.AES.decrypt(encryptedBase64Str, key, {
        iv: key,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
      });

      var decryptedStr = decryptedData.toString(CryptoJS.enc.Utf8);
      console.log("解密后:" + decryptedStr);

    }

  </script>
</body>

</html>

参考文章