lib/utility.php

   1 <?php\r
   2         function setEncryptCookie($key, $value, $time = 0, $path = '/') {\r
   3                 if (trim(SECURE_KEY) == '') {\r
   4                         setcookie($key, $value, $time, $path);\r
   5                 } else {\r
   6                         setcookie($key, encrypt($value), $time, $path);\r
   7                 }\r
   8         }\r
   9 \r
  10         function getEncryptCookie($key) {\r
  11                 if ( isset($_COOKIE[$key]) ) {\r
  12                         if (trim(SECURE_KEY) == '') {\r
  13                                 return $_COOKIE[$key];\r
  14                         } else {\r
  15                                 return decrypt($_COOKIE[$key]);\r
  16                         }\r
  17                 } else { \r
  18                         return null;\r
  19                 }\r
  20         }\r
  21 \r
  22         function getCookie($key) {\r
  23                 if ( isset($_COOKIE[$key]) ) \r
  24                         return $_COOKIE[$key];\r
  25                 else \r
  26                         return null;\r
  27         }\r
  28 \r
  29         function delCookie($key) {\r
  30                 setcookie($key, '', $_SERVER['REQUEST_TIME']-300, '/');\r
  31         }\r
  32 \r
  33         function encrypt($plain_text) {\r
  34                 if ( !function_exists('mcrypt_module_open') ) {\r
  35                         return EDencrypt($plain_text, SECURE_KEY);\r
  36                 }\r
  37                 $td = mcrypt_module_open('blowfish', '', 'cfb', '');\r
  38                 $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);\r
  39                 mcrypt_generic_init($td, SECURE_KEY, $iv);\r
  40                 $crypt_text = mcrypt_generic($td, $plain_text);\r
  41                 mcrypt_generic_deinit($td);\r
  42                 return base64_encode($iv.$crypt_text);\r
  43         }\r
  44 \r
  45         function decrypt($crypt_text) {\r
  46                 if ( !function_exists('mcrypt_module_open') ) {\r
  47                         return EDdecrypt($plain_text, SECURE_KEY);\r
  48                 }\r
  49                 $crypt_text = base64_decode($crypt_text);\r
  50                 $td = mcrypt_module_open('blowfish', '', 'cfb', '');\r
  51                 $ivsize = mcrypt_enc_get_iv_size($td);\r
  52                 $iv = substr($crypt_text, 0, $ivsize);\r
  53                 $crypt_text = substr($crypt_text, $ivsize);\r
  54                 mcrypt_generic_init($td, SECURE_KEY, $iv);\r
  55                 $plain_text = mdecrypt_generic($td, $crypt_text);\r
  56                 mcrypt_generic_deinit($td);\r
  57 \r
  58                 return $plain_text;\r
  59         }\r
  60 \r
  61         if ( !function_exists('mb_strlen') ) {\r
  62                 function mb_strlen($text, $encode) {\r
  63                         if (strtolower($encode) == 'utf-8') {\r
  64                                 return preg_match_all('%(?:\r
  65                                         [\x09\x0A\x0D\x20-\x7E]     # ASCII\r
  66                                         | [\xC2-\xDF][\x80-\xBF]# non-overlong 2-byte\r
  67                                         |  \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs\r
  68                                         | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte\r
  69                                         |  \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates\r
  70                                         |  \xF0[\x90-\xBF][\x80-\xBF]{2}    # planes 1-3\r
  71                                         | [\xF1-\xF3][\x80-\xBF]{3}   # planes 4-15\r
  72                                         |  \xF4[\x80-\x8F][\x80-\xBF]{2}    # plane 16\r
  73                                 )%xs',$text,$out);\r
  74                         }else{\r
  75                                 return strlen($text);\r
  76                         }\r
  77                 }\r
  78         }\r
  79         \r
  80         function keyED($txt,$encrypt_key) {\r
  81 \r
  82                 $encrypt_key = md5($encrypt_key);\r
  83                 $ctr=0;\r
  84                 $tmp = "";\r
  85 \r
  86                 for ($i=0;$i<strlen($txt);$i++) {\r
  87                         if ($ctr==strlen($encrypt_key)) $ctr=0;\r
  88                         $tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);\r
  89                         $ctr++;\r
  90                 }\r
  91 \r
  92                 return $tmp;\r
  93         }\r
  94 \r
  95         function EDencrypt($txt,$key) {\r
  96 \r
  97                 srand((double)microtime()*1000000);\r
  98                 $encrypt_key = md5(rand(0,32000));\r
  99                 $ctr=0;\r
 100                 $tmp = "";\r
 101 \r
 102                 for ($i=0;$i<strlen($txt);$i++) {\r
 103                         if ($ctr==strlen($encrypt_key)) $ctr=0;\r
 104                         $tmp.= substr($encrypt_key,$ctr,1) . (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));\r
 105                         $ctr++;\r
 106                 }\r
 107 \r
 108                 return keyED($tmp,$key);\r
 109         }\r
 110 \r
 111         function EDdecrypt($txt,$key) {\r
 112 \r
 113                 $txt = keyED($txt,$key);\r
 114                 $tmp = "";\r
 115 \r
 116                 for ($i=0;$i<strlen($txt);$i++) {\r
 117                         $md5 = substr($txt,$i,1);\r
 118                         $i++;\r
 119                         $tmp.= (substr($txt,$i,1) ^ $md5);\r
 120                 }\r
 121 \r
 122                 return $tmp;\r
 123 \r
 124         }\r
 125 ?>\r