search
HomeBackend DevelopmentPHP ProblemHow to use Aes for encryption in php

php can check the user's ID to determine whether the user is logged in, but this ID can be modified. After modification, all the modified user information can be obtained, so we need to encrypt the value. Let's follow the editor to see how to use Aes for encryption.

How to use Aes for encryption in php

In the project, especially on the PC side, after the user logs in, we will return an identification to the front end to determine whether the user is logged in. Most of this identification is the user id.

How to use Aes for encryption in phpBut there is a big drawback here, that is, this value can be modified. If I modify this value, I can get all the information of the modified user. It’s scary, right? !

Then let’s use aes for encryption today

<?php
namespace app\api\controller;
/**
 * aes 加密 解密类库
 * Class Aes
 * @package app\common\lib
 */
class Aes {
    private $key = null;
    /**
     *
     * @param $key 		密钥
     * @return String
     */
    public function __construct() {
        // 需要小伙伴在配置文件app.php中定义aeskey
        $this->key = &#39;1234567891112121&#39;;
    }
    /**
     * 加密
     * @param String input 加密的字符串
     * @param String key   解密的key
     * @return HexString
     */
    public function encrypt($input = &#39;&#39;) {
        $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
        $input = $this->pkcs5_pad($input, $size);
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, &#39;&#39;, MCRYPT_MODE_ECB, &#39;&#39;);
        $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        mcrypt_generic_init($td, $this->key, $iv);

        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        
        return $data;
    }
    /**
     * 填充方式 pkcs5
     * @param String text 		 原始字符串
     * @param String blocksize   加密长度
     * @return String
     */
    private function pkcs5_pad($text, $blocksize) {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }
    /**
     * 解密
     * @param String input 解密的字符串
     * @param String key   解密的key
     * @return String
     */
    public function decrypt($sStr) {
        $decrypted= mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$this->key,base64_decode($sStr), MCRYPT_MODE_ECB);
        $dec_s = strlen($decrypted);
        $padding = ord($decrypted[$dec_s-1]);
        $decrypted = substr($decrypted, 0, -$padding);

        return $decrypted;
    }
}

This is an aes tool class. Note that this value needs to be modified by ourselves, and it is 16 bits, so that our user will return the ID to the front end when logging in.

How to use Aes for encryption in php            

First introduce it in the controller

How to use Aes for encryption in php                                                                                                                                                                                           ’s ‐ to ’s ’ ’s ’

---- first introduced in the controller

How to use Aes for encryption in php# and then instantiate it

How to use Aes for encryption in php After the user successfully logs in, we encrypt this value and return it to the front end

This

u_idHow to use Aes for encryption in php is the encrypted value

Then we set these two methods in the

Comment How to use Aes for encryption in php file. These two methods are uniformly processed by the parameters, so let me judge here. Any interface with user IDs Just decrypt it

Recommended learning: ###php video tutorial######

The above is the detailed content of How to use Aes for encryption in php. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:CSDN. If there is any infringement, please contact admin@php.cn delete

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function