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-rw-r--r--system/libraries/Encrypt.php174
1 files changed, 86 insertions, 88 deletions
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php
index e297576e6..959e2eea8 100644
--- a/system/libraries/Encrypt.php
+++ b/system/libraries/Encrypt.php
@@ -1,13 +1,13 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
- *
+ *
* Licensed under the Open Software License version 3.0
- *
+ *
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* CodeIgniter Encryption Class
*
@@ -40,21 +38,50 @@
*/
class CI_Encrypt {
- public $encryption_key = '';
- protected $_hash_type = 'sha1';
- protected $_mcrypt_exists = FALSE;
+ /**
+ * Reference to the user's encryption key
+ *
+ * @var string
+ */
+ public $encryption_key = '';
+
+ /**
+ * Type of hash operation
+ *
+ * @var string
+ */
+ protected $_hash_type = 'sha1';
+
+ /**
+ * Flag for the existance of mcrypt
+ *
+ * @var bool
+ */
+ protected $_mcrypt_exists = FALSE;
+
+ /**
+ * Current cipher to be used with mcrypt
+ *
+ * @var string
+ */
protected $_mcrypt_cipher;
+
+ /**
+ * Method for encrypting/decrypting data
+ *
+ * @var int
+ */
protected $_mcrypt_mode;
/**
- * Constructor
+ * Initialize Encryption class
*
- * Simply determines whether the mcrypt library exists.
+ * @return void
*/
public function __construct()
{
- $this->_mcrypt_exists = ( ! function_exists('mcrypt_encrypt')) ? FALSE : TRUE;
- log_message('debug', "Encrypt Class Initialized");
+ $this->_mcrypt_exists = function_exists('mcrypt_encrypt');
+ log_message('debug', 'Encrypt Class Initialized');
}
// --------------------------------------------------------------------
@@ -70,9 +97,9 @@ class CI_Encrypt {
*/
public function get_key($key = '')
{
- if ($key == '')
+ if ($key === '')
{
- if ($this->encryption_key != '')
+ if ($this->encryption_key !== '')
{
return $this->encryption_key;
}
@@ -95,7 +122,7 @@ class CI_Encrypt {
* Set the encryption key
*
* @param string
- * @return void
+ * @return object
*/
public function set_key($key = '')
{
@@ -122,18 +149,8 @@ class CI_Encrypt {
*/
public function encode($string, $key = '')
{
- $key = $this->get_key($key);
-
- if ($this->_mcrypt_exists === TRUE)
- {
- $enc = $this->mcrypt_encode($string, $key);
- }
- else
- {
- $enc = $this->_xor_encode($string, $key);
- }
-
- return base64_encode($enc);
+ $method = ($this->_mcrypt_exists === TRUE) ? 'mcrypt_encode' : '_xor_encode';
+ return base64_encode($this->$method($string, $this->get_key($key)));
}
// --------------------------------------------------------------------
@@ -149,28 +166,13 @@ class CI_Encrypt {
*/
public function decode($string, $key = '')
{
- $key = $this->get_key($key);
-
if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string))
{
return FALSE;
}
- $dec = base64_decode($string);
-
- if ($this->_mcrypt_exists === TRUE)
- {
- if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE)
- {
- return FALSE;
- }
- }
- else
- {
- $dec = $this->_xor_decode($dec, $key);
- }
-
- return $dec;
+ $method = ($this->_mcrypt_exists === TRUE) ? 'mcrypt_decode' : '_xor_decode';
+ return $this->$method(base64_decode($string), $this->get_key($key));
}
// --------------------------------------------------------------------
@@ -197,6 +199,10 @@ class CI_Encrypt {
log_message('error', 'Encoding from legacy is available only when Mcrypt is in use.');
return FALSE;
}
+ elseif (preg_match('/[^a-zA-Z0-9\/\+=]/', $string))
+ {
+ return FALSE;
+ }
// decode it first
// set mode temporarily to what it was when string was encoded with the legacy
@@ -205,14 +211,7 @@ class CI_Encrypt {
$this->set_mode($legacy_mode);
$key = $this->get_key($key);
-
- if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string))
- {
- return FALSE;
- }
-
$dec = base64_decode($string);
-
if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE)
{
return FALSE;
@@ -242,17 +241,18 @@ class CI_Encrypt {
protected function _xor_encode($string, $key)
{
$rand = '';
- while (strlen($rand) < 32)
+ do
{
$rand .= mt_rand(0, mt_getrandmax());
}
+ while (strlen($rand) < 32);
$rand = $this->hash($rand);
$enc = '';
- for ($i = 0; $i < strlen($string); $i++)
+ for ($i = 0, $ls = strlen($string), $lr = strlen($rand); $i < $ls; $i++)
{
- $enc .= substr($rand, ($i % strlen($rand)), 1).(substr($rand, ($i % strlen($rand)), 1) ^ substr($string, $i, 1));
+ $enc .= $rand[($i % $lr)].($rand[($i % $lr)] ^ $string[$i]);
}
return $this->_xor_merge($enc, $key);
@@ -275,9 +275,9 @@ class CI_Encrypt {
$string = $this->_xor_merge($string, $key);
$dec = '';
- for ($i = 0; $i < strlen($string); $i++)
+ for ($i = 0, $l = strlen($string); $i < $l; $i++)
{
- $dec .= (substr($string, $i++, 1) ^ substr($string, $i, 1));
+ $dec .= ($string[$i++] ^ $string[$i]);
}
return $dec;
@@ -298,9 +298,9 @@ class CI_Encrypt {
{
$hash = $this->hash($key);
$str = '';
- for ($i = 0; $i < strlen($string); $i++)
+ for ($i = 0, $ls = strlen($string), $lh = strlen($hash); $i < $ls; $i++)
{
- $str .= substr($string, $i, 1) ^ substr($hash, ($i % strlen($hash)), 1);
+ $str .= $string[$i] ^ $hash[($i % $lh)];
}
return $str;
@@ -359,18 +359,17 @@ class CI_Encrypt {
*/
protected function _add_cipher_noise($data, $key)
{
- $keyhash = $this->hash($key);
- $keylen = strlen($keyhash);
+ $key = $this->hash($key);
$str = '';
- for ($i = 0, $j = 0, $len = strlen($data); $i < $len; ++$i, ++$j)
+ for ($i = 0, $j = 0, $ld = strlen($data), $lk = strlen($key); $i < $ld; ++$i, ++$j)
{
- if ($j >= $keylen)
+ if ($j >= $lk)
{
$j = 0;
}
- $str .= chr((ord($data[$i]) + ord($keyhash[$j])) % 256);
+ $str .= chr((ord($data[$i]) + ord($key[$j])) % 256);
}
return $str;
@@ -384,27 +383,27 @@ class CI_Encrypt {
*
* Function description
*
- * @param type
- * @return type
+ * @param string $data
+ * @param string $key
+ * @return string
*/
protected function _remove_cipher_noise($data, $key)
{
- $keyhash = $this->hash($key);
- $keylen = strlen($keyhash);
+ $key = $this->hash($key);
$str = '';
- for ($i = 0, $j = 0, $len = strlen($data); $i < $len; ++$i, ++$j)
+ for ($i = 0, $j = 0, $ld = strlen($data), $lk = strlen($key); $i < $ld; ++$i, ++$j)
{
- if ($j >= $keylen)
+ if ($j >= $lk)
{
$j = 0;
}
- $temp = ord($data[$i]) - ord($keyhash[$j]);
+ $temp = ord($data[$i]) - ord($key[$j]);
if ($temp < 0)
{
- $temp = $temp + 256;
+ $temp += 256;
}
$str .= chr($temp);
@@ -418,8 +417,8 @@ class CI_Encrypt {
/**
* Set the Mcrypt Cipher
*
- * @param constant
- * @return string
+ * @param int
+ * @return object
*/
public function set_cipher($cipher)
{
@@ -432,10 +431,10 @@ class CI_Encrypt {
/**
* Set the Mcrypt Mode
*
- * @param constant
- * @return string
+ * @param int
+ * @return object
*/
- function set_mode($mode)
+ public function set_mode($mode)
{
$this->_mcrypt_mode = $mode;
return $this;
@@ -446,13 +445,13 @@ class CI_Encrypt {
/**
* Get Mcrypt cipher Value
*
- * @return string
+ * @return int
*/
protected function _get_cipher()
{
- if ($this->_mcrypt_cipher == '')
+ if ($this->_mcrypt_cipher === NULL)
{
- $this->_mcrypt_cipher = MCRYPT_RIJNDAEL_256;
+ return $this->_mcrypt_cipher = MCRYPT_RIJNDAEL_256;
}
return $this->_mcrypt_cipher;
@@ -463,13 +462,13 @@ class CI_Encrypt {
/**
* Get Mcrypt Mode Value
*
- * @return string
+ * @return int
*/
protected function _get_mode()
{
- if ($this->_mcrypt_mode == '')
+ if ($this->_mcrypt_mode === NULL)
{
- $this->_mcrypt_mode = MCRYPT_MODE_CBC;
+ return $this->_mcrypt_mode = MCRYPT_MODE_CBC;
}
return $this->_mcrypt_mode;
@@ -481,11 +480,11 @@ class CI_Encrypt {
* Set the Hash type
*
* @param string
- * @return string
+ * @return void
*/
public function set_hash($type = 'sha1')
{
- $this->_hash_type = ($type != 'sha1' AND $type != 'md5') ? 'sha1' : $type;
+ $this->_hash_type = ($type !== 'sha1' && $type !== 'md5') ? 'sha1' : $type;
}
// --------------------------------------------------------------------
@@ -498,11 +497,10 @@ class CI_Encrypt {
*/
public function hash($str)
{
- return ($this->_hash_type == 'sha1') ? sha1($str) : md5($str);
+ return ($this->_hash_type === 'sha1') ? sha1($str) : md5($str);
}
-}
-// END CI_Encrypt class
+}
/* End of file Encrypt.php */
/* Location: ./system/libraries/Encrypt.php */ \ No newline at end of file
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-03 22:19:46 +0100