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先说需求：

前端 <-> 加密数据 <-> 后端

总的来说PHP的使用时最简单的，坑最少，当之无愧世界上最好的语言

以下是代码实现

AES加密算法32位秘钥key （通过给定秘钥取md5值获得） 12345616位初始向量iv 秘钥key的md5值前16位加密数据 "123456789"

1、PHP实现AES加密解密

使用函数 openssl_encrypt 和 openssl_decrypt

   key = $key;        $this->method = $method;        $this->iv = $iv;    }    // 加密数据    public function encrypt($plain_text)    {
           return openssl_encrypt($plain_text, $this->method, $this->key, 0, $this->iv);    }    // 解密数据    public function decrypt($cipher_text)    {
           return openssl_decrypt($cipher_text, $this->method, $this->key, 0, $this->iv);    }}/** * 以下是测试代码 */// ECB 模式function test_ecb($key, $data){
       $aes = new AESCipher("AES-256-ECB", $key);    $cipher_text = $aes->encrypt($data);    echo $cipher_text . PHP_EOL;    // 7J0VfbEYF0XdLnLuA1b4Fw==    $plain_text = $aes->decrypt($cipher_text);    echo $plain_text . PHP_EOL;    // 123456789}// CBC 模式function test_cbc($key, $data, $iv){
       $aes = new AESCipher("AES-256-CBC", $key, $iv);    $cipher_text = $aes->encrypt($data);    echo $cipher_text . PHP_EOL;    // sfH6iGxc01TkIaOUN77hQQ==    $plain_text = $aes->decrypt($cipher_text);    echo $plain_text . PHP_EOL;    // 123456789}$key = "123456";$md5_key = md5($key);$iv = substr($md5_key, 0, 16);$data = "123456789";test_ecb($md5_key, $data);test_cbc($md5_key, $data, $iv);

参考

2、Python3实现AES加密解密

安装模块

pip3 install md5utilpip3 install pycryptodome

import base64from Crypto.Cipher import AESfrom Crypto.Util.Padding import pad, unpadfrom md5util import md5class AESCipher(object):    def __init__(self, key, mode, **kwargs):        """        :param key:            16 (AES-128)            24 (AES-192)            32 (AES-256)        :param mode: 模式        :param kwargs:            iv 初始向量 MODE_CBC 模式使用 必须是16字节        """        self.key = key        self.mode = mode        self.kwargs = kwargs    def _get_aes(self):        """TypeError: decrypt() cannot be called after encrypt()"""        return AES.new(self.key.encode('utf-8'), self.mode, **self.kwargs)    def encrypt(self, plain_text):        # 选择pkcs7补全        pad_pkcs7 = pad(plain_text.encode('utf-8'), AES.block_size)        encrypt_data = self._get_aes().encrypt(pad_pkcs7)        return str(base64.b64encode(encrypt_data), encoding='utf-8')    def decrypt(self, cipher_text):        padded_data = self._get_aes().decrypt(base64.b64decode(cipher_text.encode('utf-8')))        return str(unpad(padded_data, AES.block_size), encoding='utf-8')def main():    key = "123456"    md5_key = md5(key)    aes_str = "123456789"	# ECB 模式    ecb_cipher = AESCipher(md5_key, mode=AES.MODE_ECB)    cipher_text = ecb_cipher.encrypt(aes_str)    print(cipher_text)    # 7J0VfbEYF0XdLnLuA1b4Fw==    print(ecb_cipher.decrypt(cipher_text))		# CBC 模式    cbc_cipher = AESCipher(md5_key, mode=AES.MODE_CBC, IV=md5_key[0:16].encode())    cipher_text = cbc_cipher.encrypt(aes_str)    print(cipher_text)    # sfH6iGxc01TkIaOUN77hQQ==    print(cbc_cipher.decrypt(cipher_text))if __name__ == '__main__':    main()

参考

3、JavaScript实现AES加密解密

安装

npm install crypto-js

crypto-js使用的时候有点坑，不像别的语言实现，它会将你传入的key转为它需要的对象，所以要先调用下parse函数

var CryptoJS = require("crypto-js");// 辅助函数function md5(data) {
       return CryptoJS.MD5(data).toString();}// 传入key之前要调用，不然结果不对function parseKey(key) {
       return CryptoJS.enc.Utf8.parse(key);}// 加密过程function encrypt(mode, plainText, key, iv = null) {
       const uKey = parseKey(key);    const uIv = parseKey(iv);    return CryptoJS.AES.encrypt(plainText, uKey,        {
               iv: uIv,            mode: mode,            padding: CryptoJS.pad.Pkcs7        }    ).toString();}// 解密过程function decrypt(mode, cipherText, key, iv = null) {
       const uKey = parseKey(key);    const uIv = parseKey(iv);    let bytes = CryptoJS.AES.decrypt(cipherText, uKey,        {
               iv: uIv,            mode: mode,            padding: CryptoJS.pad.Pkcs7        }    );    return bytes.toString(CryptoJS.enc.Utf8);}function test() {
       const key = '123456';    const md5Key = md5(key);    const iv = md5Key.substr(0, 16);    const data = '123456789';    // ECB 模式    let cipherText = encrypt(CryptoJS.mode.ECB, data, md5Key);    console.log(cipherText);    // 7J0VfbEYF0XdLnLuA1b4Fw==    let plainText = decrypt(CryptoJS.mode.ECB, cipherText, md5Key);    console.log(plainText);    // CBC 模式    cipherText = encrypt(CryptoJS.mode.CBC, data, md5Key, iv);    console.log(cipherText);    // sfH6iGxc01TkIaOUN77hQQ==        plainText = decrypt(CryptoJS.mode.CBC, cipherText, md5Key, iv);    console.log(plainText);}test();

参考

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