Home Backend Development PHP Tutorial PHP中加密解密函数与DES加密解密实例_PHP

PHP中加密解密函数与DES加密解密实例_PHP

May 31, 2016 pm 07:29 PM
des php encryption Decrypt

本文实例讲述了PHP中加密解密函数与DES加密解密的应用,分享给大家供大家参考。具体如下:

例子,php加密解密的例子

加密函数:

代码如下:

/*
*功能:对字符串进行加密处理
*参数一:需要加密的内容
*参数二:密钥
*/
function passport_encrypt($str,$key){ //加密函数
 srand((double)microtime() * 1000000);
 $encrypt_key=md5(rand(0, 32000));
 $ctr=0;
 $tmp='';
 for($i=0;$i   $ctr=$ctr==strlen($encrypt_key)?0:$ctr;
  $tmp.=$encrypt_key[$ctr].($str[$i] ^ $encrypt_key[$ctr++]);
 }
 return base64_encode(passport_key($tmp,$key));
}

解密代码如下:

代码如下:

/*
*功能:对字符串进行解密处理
*参数一:需要解密的密文
*参数二:密钥
*/
function passport_decrypt($str,$key){ //解密函数
 $str=passport_key(base64_decode($str),$key);
 $tmp='';
 for($i=0;$i   $md5=$str[$i];
  $tmp.=$str[++$i] ^ $md5;
 }
 return $tmp;
}


辅助函数:

代码如下:

/*
*辅助函数
*/
function passport_key($str,$encrypt_key){
 $encrypt_key=md5($encrypt_key);
 $ctr=0;
 $tmp='';
 for($i=0;$i   $ctr=$ctr==strlen($encrypt_key)?0:$ctr;
  $tmp.=$str[$i] ^ $encrypt_key[$ctr++];
 }
 return $tmp;
}


使用如下所示

代码如下:

$str='作者:www.bitsCN.com';
$key='123456';
$encrypt=passport_encrypt($str,$key);
$decrypt=passport_decrypt($encrypt,$key);
echo '原文:',$str."


";
echo '密文:',$encrypt."

";
echo '译文:',$decrypt."

";
DES加密解密函数具体代码如下:

代码如下:

class DES
{
 var $key;
 var $iv; //偏移量
 
 function DES( $key, $iv=0 ) {
 //key长度8例如:1234abcd
  $this->key = $key;
  if( $iv == 0 ) {
   $this->iv = $key;
  } else {
   $this->iv = $iv; //mcrypt_create_iv ( mcrypt_get_block_size (MCRYPT_DES, MCRYPT_MODE_CBC), MCRYPT_DEV_RANDOM );
  }
 }
 
 function encrypt($str) {
 //加密,返回大写十六进制字符串
  $size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC );
  $str = $this->pkcs5Pad ( $str, $size );
  return strtoupper( bin2hex( mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv ) ) );
 }
 
 function decrypt($str) {
 //解密
  $strBin = $this->hex2bin( strtolower( $str ) );
  $str = mcrypt_cbc( MCRYPT_DES, $this->key, $strBin, MCRYPT_DECRYPT, $this->iv );
  $str = $this->pkcs5Unpad( $str );
  return $str;
 }
 
 function hex2bin($hexData) {
  $binData = "";
  for($i = 0; $i    $binData .= chr ( hexdec ( substr ( $hexData, $i, 2 ) ) );
  }
  return $binData;
 }
 
 function pkcs5Pad($text, $blocksize) {
  $pad = $blocksize - (strlen ( $text ) % $blocksize);
  return $text . str_repeat ( chr ( $pad ), $pad );
 }
 
 function pkcs5Unpad($text) {
  $pad = ord ( $text {strlen ( $text ) - 1} );
  if ($pad > strlen ( $text ))
   return false;
  if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)
   return false;
  return substr ( $text, 0, - 1 * $pad );
 }
}
?>


以下是测试结果:

代码如下:

$str = '12345678';
$key = '1234abcd';
$crypt = new DES($key);
$mstr = $crypt->encrypt($str);
$str = $crypt->decrypt($mstr);
echo  $str.' '.$mstr;


例子2

代码如下:

代码如下:

/**
*加密需通过get方式在url中传递的参数
*/
function args_encode($data) {
if(is_array($data)) {
$string = http_build_query($data);
return base64_encode($string);
} else {
return false;
}
}

/**
*获取url中get方式传递的参数
*/
function getargs() {
$string = base64_decode($_GET['args']);
parse_str($string,$g);
return $g;
}

希望本文所述对大家的PHP程序设计有所帮助。

Statement of this Website
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

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

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

7 PHP Functions I Regret I Didn't Know Before 7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

Get the gate.io installation package for free Get the gate.io installation package for free Feb 21, 2025 pm 08:21 PM

Gate.io is a popular cryptocurrency exchange that users can use by downloading its installation package and installing it on their devices. The steps to obtain the installation package are as follows: Visit the official website of Gate.io, click "Download", select the corresponding operating system (Windows, Mac or Linux), and download the installation package to your computer. It is recommended to temporarily disable antivirus software or firewall during installation to ensure smooth installation. After completion, the user needs to create a Gate.io account to start using it.

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

See all articles