diff options
Diffstat (limited to 'system/libraries')
| -rw-r--r-- | system/libraries/Encrypt.php | 100 |
1 files changed, 50 insertions, 50 deletions
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php index 16c9efe61..bd74592d1 100644 --- a/system/libraries/Encrypt.php +++ b/system/libraries/Encrypt.php @@ -27,14 +27,14 @@ * @link http://codeigniter.com/user_guide/libraries/encryption.html
*/
class CI_Encrypt {
-
+
var $CI;
var $encryption_key = '';
var $_hash_type = 'sha1';
var $_mcrypt_exists = FALSE;
var $_mcrypt_cipher;
var $_mcrypt_mode;
-
+
/**
* Constructor
*
@@ -47,7 +47,7 @@ class CI_Encrypt { $this->_mcrypt_exists = ( ! function_exists('mcrypt_encrypt')) ? FALSE : TRUE;
log_message('debug', "Encrypt Class Initialized");
}
-
+
// --------------------------------------------------------------------
/**
@@ -63,12 +63,12 @@ class CI_Encrypt { function get_key($key = '')
{
if ($key == '')
- {
+ {
if ($this->encryption_key != '')
{
return $this->encryption_key;
}
-
+
$CI =& get_instance();
$key = $CI->config->item('encryption_key');
@@ -77,7 +77,7 @@ class CI_Encrypt { show_error('In order to use the encryption class requires that you set an encryption key in your config file.');
}
}
-
+
return md5($key);
}
@@ -94,7 +94,7 @@ class CI_Encrypt { {
$this->encryption_key = $key;
}
-
+
// --------------------------------------------------------------------
/**
@@ -122,9 +122,9 @@ class CI_Encrypt { {
$enc = $this->mcrypt_encode($enc, $key);
}
- return base64_encode($enc);
+ return base64_encode($enc);
}
-
+
// --------------------------------------------------------------------
/**
@@ -155,10 +155,10 @@ class CI_Encrypt { return FALSE;
}
}
-
+
return $this->_xor_decode($dec, $key);
}
-
+
// --------------------------------------------------------------------
/**
@@ -171,7 +171,7 @@ class CI_Encrypt { * @param string
* @param string
* @return string
- */
+ */
function _xor_encode($string, $key)
{
$rand = '';
@@ -179,18 +179,18 @@ class CI_Encrypt { {
$rand .= mt_rand(0, mt_getrandmax());
}
-
+
$rand = $this->hash($rand);
-
+
$enc = '';
for ($i = 0; $i < strlen($string); $i++)
{
$enc .= substr($rand, ($i % strlen($rand)), 1).(substr($rand, ($i % strlen($rand)), 1) ^ substr($string, $i, 1));
}
-
+
return $this->_xor_merge($enc, $key);
}
-
+
// --------------------------------------------------------------------
/**
@@ -203,20 +203,20 @@ class CI_Encrypt { * @param string
* @param string
* @return string
- */
+ */
function _xor_decode($string, $key)
{
$string = $this->_xor_merge($string, $key);
-
+
$dec = '';
for ($i = 0; $i < strlen($string); $i++)
{
$dec .= (substr($string, $i++, 1) ^ substr($string, $i, 1));
}
-
+
return $dec;
}
-
+
// --------------------------------------------------------------------
/**
@@ -228,7 +228,7 @@ class CI_Encrypt { * @param string
* @param string
* @return string
- */
+ */
function _xor_merge($string, $key)
{
$hash = $this->hash($key);
@@ -237,10 +237,10 @@ class CI_Encrypt { {
$str .= substr($string, $i, 1) ^ substr($hash, ($i % strlen($hash)), 1);
}
-
+
return $str;
}
-
+
// --------------------------------------------------------------------
/**
@@ -252,12 +252,12 @@ class CI_Encrypt { * @return string
*/
function mcrypt_encode($data, $key)
- {
+ {
$init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode());
$init_vect = mcrypt_create_iv($init_size, MCRYPT_RAND);
return $this->_add_cipher_noise($init_vect.mcrypt_encrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), $key);
}
-
+
// --------------------------------------------------------------------
/**
@@ -267,22 +267,22 @@ class CI_Encrypt { * @param string
* @param string
* @return string
- */
+ */
function mcrypt_decode($data, $key)
{
$data = $this->_remove_cipher_noise($data, $key);
$init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode());
-
+
if ($init_size > strlen($data))
{
return FALSE;
}
-
+
$init_vect = substr($data, 0, $init_size);
$data = substr($data, $init_size);
return rtrim(mcrypt_decrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), "\0");
}
-
+
// --------------------------------------------------------------------
/**
@@ -302,22 +302,22 @@ class CI_Encrypt { $keyhash = $this->hash($key);
$keylen = strlen($keyhash);
$str = '';
-
+
for ($i = 0, $j = 0, $len = strlen($data); $i < $len; ++$i, ++$j)
- {
+ {
if ($j >= $keylen)
{
$j = 0;
}
-
+
$str .= chr((ord($data[$i]) + ord($keyhash[$j])) % 256);
}
-
+
return $str;
}
// --------------------------------------------------------------------
-
+
/**
* Removes permuted noise from the IV + encrypted data, reversing
* _add_cipher_noise()
@@ -340,9 +340,9 @@ class CI_Encrypt { {
$j = 0;
}
-
+
$temp = ord($data[$i]) - ord($keyhash[$j]);
-
+
if ($temp < 0)
{
$temp = $temp + 256;
@@ -350,7 +350,7 @@ class CI_Encrypt { $str .= chr($temp);
}
-
+
return $str;
}
@@ -367,7 +367,7 @@ class CI_Encrypt { {
$this->_mcrypt_cipher = $cipher;
}
-
+
// --------------------------------------------------------------------
/**
@@ -381,7 +381,7 @@ class CI_Encrypt { {
$this->_mcrypt_mode = $mode;
}
-
+
// --------------------------------------------------------------------
/**
@@ -389,7 +389,7 @@ class CI_Encrypt { *
* @access private
* @return string
- */
+ */
function _get_cipher()
{
if ($this->_mcrypt_cipher == '')
@@ -407,7 +407,7 @@ class CI_Encrypt { *
* @access private
* @return string
- */
+ */
function _get_mode()
{
if ($this->_mcrypt_mode == '')
@@ -417,7 +417,7 @@ class CI_Encrypt { return $this->_mcrypt_mode;
}
-
+
// --------------------------------------------------------------------
/**
@@ -426,12 +426,12 @@ class CI_Encrypt { * @access public
* @param string
* @return string
- */
+ */
function set_hash($type = 'sha1')
{
$this->_hash_type = ($type != 'sha1' AND $type != 'md5') ? 'sha1' : $type;
}
-
+
// --------------------------------------------------------------------
/**
@@ -440,12 +440,12 @@ class CI_Encrypt { * @access public
* @param string
* @return string
- */
+ */
function hash($str)
{
return ($this->_hash_type == 'sha1') ? $this->sha1($str) : md5($str);
}
-
+
// --------------------------------------------------------------------
/**
@@ -454,13 +454,13 @@ class CI_Encrypt { * @access public
* @param string
* @return string
- */
+ */
function sha1($str)
{
if ( ! function_exists('sha1'))
{
if ( ! function_exists('mhash'))
- {
+ {
require_once(BASEPATH.'libraries/Sha1'.EXT);
$SH = new CI_SHA;
return $SH->generate($str);
@@ -473,9 +473,9 @@ class CI_Encrypt { else
{
return sha1($str);
- }
+ }
}
-
+
}
// END CI_Encrypt class
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