RSA AES

**RSA非对称加密**结合**AES对称加密**对app端与服务端数据交互进行处理

一、准备工作

先通过工具生成RSA密钥对（私钥保存服务端用于加密，公钥给客户端解密使用）

二、加密过程

（一）先使用RSA密钥与16位随机字符加密=>生成AES密钥
（二）用AES密钥加密数据内容

三、解密过程

（一）截取数据内容前128位，再用RSA公钥一起解密=>获取AES密钥
（二）使用AES密钥解密数据内容

        //加密
        public function enCodeEcho($arr)
    {
        $iv          = '1234567890123456';
        $private_key = "-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
";
        $pri_key     = openssl_pkey_get_private($private_key);
        $aesKey      = $this->create_randomstr(16);
        //加密aes密钥  $encrypted
        openssl_private_encrypt($aesKey, $encrypted, $pri_key);
        //用aes密钥加密数据内容
        $enArr  = openssl_encrypt(json_encode($arr), 'AES-128-ECB', $aesKey, OPENSSL_RAW_DATA);
        $return = array('info' => base64_encode($encrypted . $enArr));
        echo json_encode($return);
    }
        //解密
    public function deCodeEcho($info)
    {
        $iv          = '1234567890123456';
        $public_key = "-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDLQR7/skOyIqo4UX5ZF9xZK/4A
/Z5DRN4GiQUtSDAxDpbk+Z9KcQPb5RG4RokWZ0ADgcdt8AxgdvIkpnSi3ia2F6aQ
ldX/608aRIu1CO5f3qEcBkwiiQgc9ruiETMT5JxlfsFa+mbO0JtSqrFOB0C1U29j
R/ceIhx78NSQA3bduwIDAQAB
-----END PUBLIC KEY-----
";
        $pri_key     = openssl_pkey_get_public($public_key);
        $info        = base64_decode($info);
        //获取加密的AES密钥
        $aesKey = substr($info, 0, 128);
        //解密得到AES密钥  $key
        openssl_public_decrypt($aesKey, $key, $pri_key);
        //获取待解密数据
        $data = substr($info, 128);
        //解密得到数据
        $post_data = (openssl_decrypt($data, 'AES-128-ECB', $key, OPENSSL_RAW_DATA));
        echo $post_data;
        //dd(json_decode($post_data, true));
    }
        public function create_randomstr($lenth = 6)
    {
        return $this->random($lenth, '123456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ');
    }
    public function random($length, $chars = '0123456789')
    {
        $hash = '';
        $max  = strlen($chars) - 1;
        mt_srand();
        for ($i = 0; $i < $length; $i++) {
            $hash .= $chars[mt_rand(0, $max)];
        }
        return $hash;
    }