From 7c251b38b690183b590adeb31d5155d043b6f74b Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Tue, 27 Dec 2011 16:37:23 +0200 Subject: Improve the Encryption library --- system/libraries/Encrypt.php | 92 +++++++++++++++----------------------------- 1 file changed, 32 insertions(+), 60 deletions(-) (limited to 'system') 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 @@ -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 */ -- cgit v1.2.3-24-g4f1b From cc6dbda62c1c04d4e247308f980e64d5d13c932d Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Sun, 8 Jan 2012 06:35:17 +0200 Subject: Some more misc. stuff --- system/libraries/Encrypt.php | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) (limited to 'system') diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php index d9f40b0d5..63e3bb55e 100644 --- a/system/libraries/Encrypt.php +++ b/system/libraries/Encrypt.php @@ -46,15 +46,10 @@ class CI_Encrypt { protected $_mcrypt_cipher; protected $_mcrypt_mode; - /** - * Constructor - * - * Simply determines whether the mcrypt library exists. - */ public function __construct() { $this->_mcrypt_exists = ( ! function_exists('mcrypt_encrypt')) ? FALSE : TRUE; - log_message('debug', "Encrypt Class Initialized"); + log_message('debug', 'Encrypt Class Initialized'); } // -------------------------------------------------------------------- @@ -95,7 +90,7 @@ class CI_Encrypt { * Set the encryption key * * @param string - * @return void + * @return object */ public function set_key($key = '') { @@ -457,7 +452,7 @@ class CI_Encrypt { */ public function set_hash($type = 'sha1') { - $this->_hash_type = ($type !== 'sha1' AND $type !== 'md5') ? 'sha1' : $type; + $this->_hash_type = ($type !== 'sha1' && $type !== 'md5') ? 'sha1' : $type; } // -------------------------------------------------------------------- @@ -474,7 +469,5 @@ class CI_Encrypt { } } -// END CI_Encrypt class - /* End of file Encrypt.php */ /* Location: ./system/libraries/Encrypt.php */ -- cgit v1.2.3-24-g4f1b From d655a997f7b98da29ea932084e2fb50956188141 Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Tue, 10 Jan 2012 22:31:29 +0200 Subject: Two returns --- system/libraries/Encrypt.php | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'system') diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php index 63e3bb55e..8cb4b1b19 100644 --- a/system/libraries/Encrypt.php +++ b/system/libraries/Encrypt.php @@ -180,7 +180,6 @@ class CI_Encrypt { $key = $this->get_key($key); $dec = base64_decode($string); - if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE) { return FALSE; @@ -419,7 +418,7 @@ class CI_Encrypt { { if ($this->_mcrypt_cipher == '') { - $this->_mcrypt_cipher = MCRYPT_RIJNDAEL_256; + return $this->_mcrypt_cipher = MCRYPT_RIJNDAEL_256; } return $this->_mcrypt_cipher; @@ -436,7 +435,7 @@ class CI_Encrypt { { if ($this->_mcrypt_mode == '') { - $this->_mcrypt_mode = MCRYPT_MODE_CBC; + return $this->_mcrypt_mode = MCRYPT_MODE_CBC; } return $this->_mcrypt_mode; -- cgit v1.2.3-24-g4f1b From f4cb94ef0fdc81f6d9d908a4a2d2efda62add379 Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Thu, 19 Jan 2012 15:16:55 +0200 Subject: Some more cleaning --- system/libraries/Encrypt.php | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'system') diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php index 8cb4b1b19..7c8720fd6 100644 --- a/system/libraries/Encrypt.php +++ b/system/libraries/Encrypt.php @@ -9,7 +9,7 @@ * Licensed under the Open Software License version 3.0 * * This source file is subject to the Open Software License (OSL 3.0) that is - * bundled with this package in the files license.txt / license.rst. It is + * bundled with this package in the files license.txt / license.rst. It is * also available through the world wide web at this URL: * http://opensource.org/licenses/OSL-3.0 * If you did not receive a copy of the license and are unable to obtain it @@ -25,8 +25,6 @@ * @filesource */ -// ------------------------------------------------------------------------ - /** * CodeIgniter Encryption Class * @@ -447,7 +445,7 @@ class CI_Encrypt { * Set the Hash type * * @param string - * @return string + * @return void */ public function set_hash($type = 'sha1') { -- cgit v1.2.3-24-g4f1b From ed6531362e9eb98eeb477c63e3c365f79333e724 Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Tue, 24 Jan 2012 15:26:42 +0200 Subject: Revert a space in the license agreement :) --- system/libraries/Encrypt.php | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'system') diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php index 7c8720fd6..f6eea3b7e 100644 --- a/system/libraries/Encrypt.php +++ b/system/libraries/Encrypt.php @@ -9,7 +9,7 @@ * 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 + * bundled with this package in the files license.txt / license.rst. It is * also available through the world wide web at this URL: * http://opensource.org/licenses/OSL-3.0 * If you did not receive a copy of the license and are unable to obtain it -- cgit v1.2.3-24-g4f1b