实用的PHP带公钥加密类分享(每次加密结果都不一样哦),php加密
WEB交互安全一直是个各大网站的首要解决方案,本文介绍的PHP加密类非常实用哦,带有公钥,这是最大的亮点,没有公钥是不能解密的,加密度非常高。
类代码:
<?php /** * PHP加密类 * 琼台博客 */ class Jiami{ // 公钥 protected $key = 'lee'; private function keyED($txt,$encrypt_key){ $encrypt_key = md5($encrypt_key); $ctr=0; $tmp = ''; for ($i=0;$i<strlen($txt);$i++){ if ($ctr==strlen($encrypt_key)){ $ctr=0; } $tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1); $ctr++; } return $tmp; } public function encrypt($txt,$key=''){ if(empty($key)){ $key=$this->key; } srand((double)microtime()*1000000); $encrypt_key = md5(rand(0,32000)); $ctr=0; $tmp = ''; for ($i=0;$i<strlen($txt);$i++) { if ($ctr==strlen($encrypt_key)){ $ctr=0; } $tmp.= substr($encrypt_key,$ctr,1).(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1)); $ctr++; } return $this->keyED($tmp,$key); } public function decrypt($txt,$key=''){ if(empty($key)){ $key=$this->key; } $txt = $this->keyED($txt,$key); $tmp = ''; for ($i=0;$i<strlen($txt);$i++){ $md5 = substr($txt,$i,1); $i++; $tmp.= (substr($txt,$i,1) ^ $md5); } return $tmp; } public function setKey($key){ if(empty($key)){ return null; } $this->key=$key; } public function getPK(){ return $this->key; } }
使用方法:
<?php // 先包含加密类 require_once('jiami.class.php'); // 要加密的字符串 $string = 'http://www.bkjia.com'; // 实例化加密类 $jiami= new Jiami(); // 设置公钥 $jiami->setKey('qttc'); // 加密字符串 $enc = $jiami->encrypt($string,$jiami->getPK()); // 解密字符串 $dec = $jiami->decrypt($enc,$jiami->getPK()); echo '<meta charset="utf-8" />'; echo '加密前 : '.$string .'<br/>'; echo '加密后 : '.$enc .'<br/>'; echo '解密后 : '.$dec; ?>
页面执行结果
结果1:
结果2:
由以上结果可以看到,每次加密产生的加密字符串都不一样,这是随机的。
解密的时候,需要使用加密时的公钥,否则无法解密。如你这边加密公钥使用‘qttc',解密的时候,也需要使用这个'qttc'作为公钥去解密,否则无法解密。
对称加密加密速度比非对称加密快,对称加密密钥不能公开而非对称的私钥必须保密公钥可以公开,关于管理和发布对称加密比较复杂,关于算法对称加密通常用DES,AES,IDEA。非对称用RSA
C.加密密钥和解密密钥匙相同的

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