CoreCrypt.class.php

 
 * 作者：男版迪士尼
 * 时间：2011年6月13日 23:12:25
 * 注：部分代码来自网络[康盛]
 *
 * @param  
 
  	$string	明文或密文
 * @param	
  
    $key 一次密匙 * @param 
   
     $key1 二次密匙 * @param 
    
      $expiry 密文有效期 * @return 
     
       * * 加密：EnCrypt($string, $key, $key1, $expiry) * 解密：DeCrypt($string, $key, $key1, $expiry) */ class CoreCrypt{ public function EnCrypt($string, $key, $key1, $expiry = 0){ $encrypt = $this->Passport_Encrypt($string, $key); $authcode_en = $this->AuthCode($encrypt, null, $key1, $expiry); return $authcode_en; } public function DeCrypt($string, $key, $key1, $expiry = 0){ $authcode_de = $this->AuthCode($string, "DECODE", $key1, $expiry); $decrypt = $this->Passport_Decrypt($authcode_de, $key); return $decrypt; } private function AuthCode($string, $operation = 'DECODE', $key = '', $expiry = 0){ $ckey_length = 4; $key = md5($key ? $key : $GLOBALS['AuthKey']['authkey']); $keya = md5(substr($key, 0, 16)); $keyb = md5(substr($key, 16, 16)); $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length) : substr(md5(microtime()), -$ckey_length)) : ''; $cryptkey = $keya.md5($keya.$keyc); $key_length = strlen($cryptkey); $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string; $string_length = strlen($string); $result = ''; $box = range(0, 255); $rndkey = array(); for($i = 0; $i <= 255; $i++){ $rndkey[$i] = ord($cryptkey[$i % $key_length]); } for($j = $i = 0; $i < 256; $i++){ $j = ($j + $box[$i] + $rndkey[$i]) % 256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } for($a = $j = $i = 0; $i < $string_length; $i++){ $a = ($a + 1) % 256; $j = ($j + $box[$a]) % 256; $tmp = $box[$a]; $box[$a] = $box[$j]; $box[$j] = $tmp; $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256])); } if($operation == 'DECODE'){ if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)){ return substr($result, 26); }else{ return ''; } }else{ return $keyc.str_replace('=', '', base64_encode($result)); } } private function Passport_Encrypt($txt, $key){ $txt = serialize($txt); srand((double)microtime() * 1000000); $encrypt_key = md5(rand(0, 32000)); $ctr = 0; $tmp = ''; for($i = 0;$i < strlen($txt); $i++){ $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr; $tmp .= $encrypt_key[$ctr].($txt[$i] ^ $encrypt_key[$ctr++]); } return base64_encode($this->Passport_Key($tmp, $key)); } private function mb_unserialize($serial_str){ $out = preg_replace('!s:(\d+):"(.*?)";!se', "'s:'.strlen('$2').':\"$2\";'", $serial_str); return unserialize($out); } private function Passport_Decrypt($txt, $key){ $txt = $this->Passport_Key(base64_decode($txt), $key); $tmp = ''; for($i = 0;$i < strlen($txt); $i++){ $md5 = $txt[$i]; $tmp .= $txt[++$i] ^ $md5; } return @unserialize($tmp); } private function Passport_Key($txt, $encrypt_key){ $encrypt_key = md5($encrypt_key); $ctr = 0; $tmp = ''; for($i = 0; $i < strlen($txt); $i++){ $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr; $tmp .= $txt[$i] ^ $encrypt_key[$ctr++]; } return $tmp; } } ?>