Maison >développement back-end >tutoriel php >php加密解密处理类--参 考:Discuz论坛的passpor_PHP教程
<?php
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/*=========================================================== |
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= 版权协议: |
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= GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991) |
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=------------------------------------------------------------ |
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= 文件名称:cls.sys_crypt.php |
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= 摘 要:php加密解密处理类 |
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= 版 本:1.0 |
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= 参 考:Discuz论坛的passport相关函数 |
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=------------------------------------------------------------ |
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= Script Written By PHPWMS项目组 |
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= 最后更新:xinge |
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= 最后日期:2007-12-09 |
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============================================================*/ |
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class SysCrypt {
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private $crypt_key ;
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// 构造函数 |
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public function __construct( $crypt_key ) {
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$this -> crypt_key = $crypt_key ;
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} |
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public function php_encrypt( $txt ) {
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srand((double)microtime() * 1000000);
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$encrypt_key = md5(rand(0,32000));
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$ctr = 0;
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$tmp = '' ;
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for ( $i = 0; $i <code class="php functions">strlen ( $txt ); $i ++) {
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$ctr = $ctr == <code class="php functions">strlen( $encrypt_key ) ? 0 : $ctr ;
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$tmp .= $encrypt_key [ $ctr ].( $txt [ $i ]^ $encrypt_key [ $ctr ++]);
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}
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return base64_encode (self::__key( $tmp , $this -> crypt_key));
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} |
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public function php_decrypt( $txt ) {
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$txt = self::__key( base64_decode ( $txt ), $this -> crypt_key);
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$tmp = '' ;
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for ( $i = 0; $i <code class="php functions">strlen ( $txt ); $i ++) {
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$md5 = $txt [ $i ];
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$tmp .= $txt [++ $i ] ^ $md5 ;
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}
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return $tmp ;
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} |
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private function __key( $txt , $encrypt_key ) {
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$encrypt_key = md5( $encrypt_key );
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$ctr = 0;
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$tmp = '' ;
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for ( $i = 0; $i <code class="php functions">strlen ( $txt ); $i ++) {
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$ctr = $ctr == <code class="php functions">strlen( $encrypt_key ) ? 0 : $ctr ;
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$tmp .= $txt [ $i ] ^ $encrypt_key [ $ctr ++];
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}
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return $tmp ;
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} |
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public function __destruct() {
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$this -> crypt_key = null;
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} |
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} |
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$sc = new SysCrypt( 'phpwms' );
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$text = '110' ;
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print( $sc -> php_encrypt( $text ));
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print( '<br>' );
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print( $sc -> php_decrypt( $sc -> php_encrypt( $text )));
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?> |