diff options
| -rw-r--r-- | system/libraries/Encrypt.php | 92 |
1 files changed, 32 insertions, 60 deletions
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php index 92b0b3c4a..d9f40b0d5 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 * * 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: @@ -122,18 +122,8 @@ 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 +139,13 @@ 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 +172,10 @@ 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 @@ -205,12 +184,6 @@ 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, $key)) === FALSE) @@ -242,17 +215,18 @@ class CI_Encrypt { protected function _xor_encode($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 +249,9 @@ 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 +272,9 @@ 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 $str; @@ -359,18 +333,17 @@ class CI_Encrypt { */ protected function _add_cipher_noise($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 $str; @@ -389,22 +362,21 @@ class CI_Encrypt { */ protected function _remove_cipher_noise($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); @@ -435,7 +407,7 @@ class CI_Encrypt { * @param constant * @return string */ - function set_mode($mode) + public function set_mode($mode) { $this->_mcrypt_mode = $mode; return $this; @@ -485,7 +457,7 @@ class CI_Encrypt { */ public function set_hash($type = 'sha1') { - $this->_hash_type = ($type != 'sha1' AND $type != 'md5') ? 'sha1' : $type; + $this->_hash_type = ($type !== 'sha1' AND $type !== 'md5') ? 'sha1' : $type; } // -------------------------------------------------------------------- @@ -498,11 +470,11 @@ class CI_Encrypt { */ public function hash($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 +/* Location: ./system/libraries/Encrypt.php */ |