search
HomeBackend DevelopmentPHP TutorialData encryption and decryption

With the upgrade of PHP version, some functions have been abandoned, such as encryption and decryption functions. Before PHP7.1, decryption and encryption were implemented through mcrypt_decrypt() and mcrypt_encrypt(). After PHP7.1, decryption and encryption were implemented through openssl_decrypt() and openssl_encrypt. () to implement decryption and encryption. Here, through the encapsulation class, two implementation methods are implemented to implement

Two methods of encryption and decryption steps:

Return the original data (array) during decryption --->Encryption-->Encrypted string-->Decryption-->Original array|| JSON string-->Encryption-->Encrypted string-->Decryption-->Original JSON character String || String—->Encryption—->Encrypted string—->Decrypt—->Original string)

Used below PHP7.1

Class method

What needs to be noted in this class is the key: The key length corresponding to the algorithm: The length of the encryption key of AES-128, 192 and 256 is 16, 24 respectively. and 32-bit

<?php
namespace aes;
class AesT
{
    private $_bit = MCRYPT_RIJNDAEL_256;
    private $_type = MCRYPT_MODE_CBC;
    private $_key = &#39;ThisIsYourAesKey&#39;; // 密钥 必须16位 24位  32位
    private $_use_base64 = true;
    private $_iv_size = null;
    private $_iv = null;

    /**
     * @param string $_key 密钥
     * @param int $_bit 默认使用128字节  支持256、192、128
     * @param string $_type 加密解密方式  默认为ecb 支持cfb、cbc、nofb、ofb、stream、ecb
     * @param boolean $_use_base64 默认使用base64二次加密
     */
    public function __construct($_key = &#39;&#39;, $_bit = 128, $_type = &#39;ecb&#39;, $_use_base64 = true)
    {
        // 加密字节
        if (192 === $_bit) {
            $this->_bit = MCRYPT_RIJNDAEL_192;
        } elseif (128 === $_bit) {
            $this->_bit = MCRYPT_RIJNDAEL_128;
        } else {
            $this->_bit = MCRYPT_RIJNDAEL_256;
        }
        // 加密方法
        if (&#39;cfb&#39; === $_type) {
            $this->_type = MCRYPT_MODE_CFB;
        } elseif (&#39;cbc&#39; === $_type) {
            $this->_type = MCRYPT_MODE_CBC;
        } elseif (&#39;nofb&#39; === $_type) {
            $this->_type = MCRYPT_MODE_NOFB;
        } elseif (&#39;ofb&#39; === $_type) {
            $this->_type = MCRYPT_MODE_OFB;
        } elseif (&#39;stream&#39; === $_type) {
            $this->_type = MCRYPT_MODE_STREAM;
        } else {
            $this->_type = MCRYPT_MODE_ECB;
        }
        // 密钥
        if (!empty($_key)) {
            $this->_key = $_key;
        }
        // 是否使用base64
        $this->_use_base64 = $_use_base64;

        $this->_iv_size = mcrypt_get_iv_size($this->_bit, $this->_type);
        $this->_iv = mcrypt_create_iv($this->_iv_size, MCRYPT_RAND);
    }

    /**
     * 加密
     * @param string $string 待加密字符串
     * @return string
     */
    public function encode($string)
    {
        //
        if (MCRYPT_MODE_ECB === $this->_type) {
            $encodeString = mcrypt_encrypt($this->_bit, $this->_key, json_encode($string), $this->_type);
        } else {
            $encodeString = mcrypt_encrypt($this->_bit, $this->_key, json_encode($string), $this->_type, $this->_iv);
        }
        if ($this->_use_base64) {
            $encodeString = base64_encode($encodeString);
        }
        return $encodeString;
    }

    /**
     * 解密
     * @param string $string 待解密字符串
     * @return string
     */
    public function decode($string)
    {
        if ($this->_use_base64) {
            $string = base64_decode($string);
        }
        if (MCRYPT_MODE_ECB === $this->_type) {
            $decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type);
        } else {
            $decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);
        }
      return $decodeString;
    }
}

Use

<?php
use aes\AesT;
class Test{
	public function index()
    {
        $data1 = [&#39;status&#39; => &#39;1&#39;, &#39;info&#39; => &#39;success&#39;, &#39;data&#39; => [[&#39;id&#39; => 1, &#39;name&#39; => &#39;大房间&#39;, &#39;2&#39; => &#39;小房间&#39;]]];
        //$data2 = &#39;{"status":"1","info":"success","data":[{"id":1,"name":"\u5927\u623f\u95f4","2":"\u5c0f\u623f\u95f4"}]}&#39;;
        //$data3 = &#39;PHP AES cbc模式 pkcs7 128加密解密&#39;;
        $objT = new AesT();
        $resT = $objT->encode($data1);//加密数据
        var_dump($resT);
        var_dump($objT->decode($resT));//解密
    }
}

PHP7.1 or above use

Class methods

AES-128-CBC, AES-192-CBC and AES-256-CBC The length of the encryption key is 16, 24 and 32 bits respectively


##Among the four parameters of openssl_encrypt(), you need to pay attention to the fourth parameter :

0: Automatically pad the plain text, and the returned data is base64 encoded.

1: OPENSSL_RAW_DATA, Automatically pad the plain text, But the returned result is not base64 encoded.

2 : OPENSSL_ZERO_PADDING, 自动对明文进行 0 填充, 返回的结果经过 base64 编码

<?php

namespace aes;

class Aes
{
    public static $key = &#39;&#39;;
    public static $iv = &#39;&#39;;
    public static $method = &#39;&#39;;

    public function __construct()
    {
        //加密key
        self::$key = md5(&#39;AeSNJkBfhHmJqLzHL&#39;, true);
        //保证偏移量为16位
        self::$iv = md5(&#39;HfgUdCliBjKjuRfa&#39;, true);
        //加密方式  # AES-128-CBC AES-192-CBC AES-256-CBC
        self::$method = &#39;AES-128-CBC&#39;;
    }

    /**
     * @desc 加密
     * @param $data
     * @return false|string
     */
    public function aesEn($data)
    {
        return base64_encode(openssl_encrypt(json_encode($data), self::$method, self::$key, OPENSSL_RAW_DATA, self::$iv));
    }

    /**
     * @desc 解密
     * @param $data
     * @return false|string
     */
    public function aesDe($data)
    {
        $tmpData = openssl_decrypt(base64_decode($data), self::$method, self::$key, OPENSSL_RAW_DATA, self::$iv);
        return is_null(json_decode($tmpData)) ? $tmpData : json_decode($tmpData, true);
    }
}

使用

<?php

use aes\Aes;

class Test
{
    public function aes()
    {
        $obj = new Aes();
		
        $data = [&#39;status&#39; => &#39;1&#39;, &#39;info&#39; => &#39;success&#39;, &#39;data&#39; => [[&#39;id&#39; => 1, &#39;name&#39; => &#39;大房间&#39;, &#39;2&#39; => &#39;小房间&#39;]]];
        //$data = &#39;{"status":"1","info":"success","data":[{"id":1,"name":"\u5927\u623f\u95f4","2":"\u5c0f\u623f\u95f4"}]}&#39;;
        //$data = &#39;PHP AES cbc模式 pkcs7 128加密解密&#39;;
        $res = $obj->aesEn($data);//加密数据
        var_dump($res);
        var_dump($obj->aesDe($res));//解密
    }
}


使用该加密解密类时,如果将两个类整合到一个类中,需要通过PHP_VERSION获取当前PHP版本

The above is the detailed content of Data encryption and decryption. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How can you prevent session fixation attacks?How can you prevent session fixation attacks?Apr 28, 2025 am 12:25 AM

Effective methods to prevent session fixed attacks include: 1. Regenerate the session ID after the user logs in; 2. Use a secure session ID generation algorithm; 3. Implement the session timeout mechanism; 4. Encrypt session data using HTTPS. These measures can ensure that the application is indestructible when facing session fixed attacks.

How do you implement sessionless authentication?How do you implement sessionless authentication?Apr 28, 2025 am 12:24 AM

Implementing session-free authentication can be achieved by using JSONWebTokens (JWT), a token-based authentication system where all necessary information is stored in the token without server-side session storage. 1) Use JWT to generate and verify tokens, 2) Ensure that HTTPS is used to prevent tokens from being intercepted, 3) Securely store tokens on the client side, 4) Verify tokens on the server side to prevent tampering, 5) Implement token revocation mechanisms, such as using short-term access tokens and long-term refresh tokens.

What are some common security risks associated with PHP sessions?What are some common security risks associated with PHP sessions?Apr 28, 2025 am 12:24 AM

The security risks of PHP sessions mainly include session hijacking, session fixation, session prediction and session poisoning. 1. Session hijacking can be prevented by using HTTPS and protecting cookies. 2. Session fixation can be avoided by regenerating the session ID before the user logs in. 3. Session prediction needs to ensure the randomness and unpredictability of session IDs. 4. Session poisoning can be prevented by verifying and filtering session data.

How do you destroy a PHP session?How do you destroy a PHP session?Apr 28, 2025 am 12:16 AM

To destroy a PHP session, you need to start the session first, then clear the data and destroy the session file. 1. Use session_start() to start the session. 2. Use session_unset() to clear the session data. 3. Finally, use session_destroy() to destroy the session file to ensure data security and resource release.

How can you change the default session save path in PHP?How can you change the default session save path in PHP?Apr 28, 2025 am 12:12 AM

How to change the default session saving path of PHP? It can be achieved through the following steps: use session_save_path('/var/www/sessions');session_start(); in PHP scripts to set the session saving path. Set session.save_path="/var/www/sessions" in the php.ini file to change the session saving path globally. Use Memcached or Redis to store session data, such as ini_set('session.save_handler','memcached'); ini_set(

How do you modify data stored in a PHP session?How do you modify data stored in a PHP session?Apr 27, 2025 am 12:23 AM

TomodifydatainaPHPsession,startthesessionwithsession_start(),thenuse$_SESSIONtoset,modify,orremovevariables.1)Startthesession.2)Setormodifysessionvariablesusing$_SESSION.3)Removevariableswithunset().4)Clearallvariableswithsession_unset().5)Destroythe

Give an example of storing an array in a PHP session.Give an example of storing an array in a PHP session.Apr 27, 2025 am 12:20 AM

Arrays can be stored in PHP sessions. 1. Start the session and use session_start(). 2. Create an array and store it in $_SESSION. 3. Retrieve the array through $_SESSION. 4. Optimize session data to improve performance.

How does garbage collection work for PHP sessions?How does garbage collection work for PHP sessions?Apr 27, 2025 am 12:19 AM

PHP session garbage collection is triggered through a probability mechanism to clean up expired session data. 1) Set the trigger probability and session life cycle in the configuration file; 2) You can use cron tasks to optimize high-load applications; 3) You need to balance the garbage collection frequency and performance to avoid data loss.

See all articles

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

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft