diff options
Diffstat (limited to 'system/libraries/Encrypt.php')
| -rw-r--r-- | system/libraries/Encrypt.php | 105 |
1 files changed, 27 insertions, 78 deletions
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php index c2cb808dd..92b0b3c4a 100644 --- a/system/libraries/Encrypt.php +++ b/system/libraries/Encrypt.php @@ -40,22 +40,19 @@ */ class CI_Encrypt { - var $CI; - var $encryption_key = ''; - var $_hash_type = 'sha1'; - var $_mcrypt_exists = FALSE; - var $_mcrypt_cipher; - var $_mcrypt_mode; + public $encryption_key = ''; + protected $_hash_type = 'sha1'; + protected $_mcrypt_exists = FALSE; + protected $_mcrypt_cipher; + protected $_mcrypt_mode; /** * Constructor * * Simply determines whether the mcrypt library exists. - * */ public function __construct() { - $this->CI =& get_instance(); $this->_mcrypt_exists = ( ! function_exists('mcrypt_encrypt')) ? FALSE : TRUE; log_message('debug', "Encrypt Class Initialized"); } @@ -68,11 +65,10 @@ class CI_Encrypt { * Returns it as MD5 in order to have an exact-length 128 bit key. * Mcrypt is sensitive to keys that are not the correct length * - * @access public * @param string * @return string */ - function get_key($key = '') + public function get_key($key = '') { if ($key == '') { @@ -84,7 +80,7 @@ class CI_Encrypt { $CI =& get_instance(); $key = $CI->config->item('encryption_key'); - if ($key == FALSE) + if ($key === FALSE) { show_error('In order to use the encryption class requires that you set an encryption key in your config file.'); } @@ -98,13 +94,13 @@ class CI_Encrypt { /** * Set the encryption key * - * @access public * @param string * @return void */ - function set_key($key = '') + public function set_key($key = '') { $this->encryption_key = $key; + return $this; } // -------------------------------------------------------------------- @@ -120,12 +116,11 @@ class CI_Encrypt { * that is randomized with each call to this function, * even if the supplied message and key are the same. * - * @access public * @param string the string to encode * @param string the key * @return string */ - function encode($string, $key = '') + public function encode($string, $key = '') { $key = $this->get_key($key); @@ -148,12 +143,11 @@ class CI_Encrypt { * * Reverses the above process * - * @access public * @param string * @param string * @return string */ - function decode($string, $key = '') + public function decode($string, $key = '') { $key = $this->get_key($key); @@ -191,13 +185,12 @@ class CI_Encrypt { * * For more details, see http://codeigniter.com/user_guide/installation/upgrade_200.html#encryption * - * @access public * @param string * @param int (mcrypt mode constant) * @param string * @return string */ - function encode_from_legacy($string, $legacy_mode = MCRYPT_MODE_ECB, $key = '') + public function encode_from_legacy($string, $legacy_mode = MCRYPT_MODE_ECB, $key = '') { if ($this->_mcrypt_exists === FALSE) { @@ -242,12 +235,11 @@ class CI_Encrypt { * Takes a plain-text string and key as input and generates an * encoded bit-string using XOR * - * @access private * @param string * @param string * @return string */ - function _xor_encode($string, $key) + protected function _xor_encode($string, $key) { $rand = ''; while (strlen($rand) < 32) @@ -274,12 +266,11 @@ class CI_Encrypt { * Takes an encoded string and key as input and generates the * plain-text original message * - * @access private * @param string * @param string * @return string */ - function _xor_decode($string, $key) + protected function _xor_decode($string, $key) { $string = $this->_xor_merge($string, $key); @@ -299,12 +290,11 @@ class CI_Encrypt { * * Takes a string and key as input and computes the difference using XOR * - * @access private * @param string * @param string * @return string */ - function _xor_merge($string, $key) + protected function _xor_merge($string, $key) { $hash = $this->hash($key); $str = ''; @@ -321,12 +311,11 @@ class CI_Encrypt { /** * Encrypt using Mcrypt * - * @access public * @param string * @param string * @return string */ - function mcrypt_encode($data, $key) + public function mcrypt_encode($data, $key) { $init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode()); $init_vect = mcrypt_create_iv($init_size, MCRYPT_RAND); @@ -338,12 +327,11 @@ class CI_Encrypt { /** * Decrypt using Mcrypt * - * @access public * @param string * @param string * @return string */ - function mcrypt_decode($data, $key) + public function mcrypt_decode($data, $key) { $data = $this->_remove_cipher_noise($data, $key); $init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode()); @@ -365,14 +353,11 @@ class CI_Encrypt { * against Man-in-the-middle attacks on CBC mode ciphers * http://www.ciphersbyritter.com/GLOSSARY.HTM#IV * - * Function description - * - * @access private * @param string * @param string * @return string */ - function _add_cipher_noise($data, $key) + protected function _add_cipher_noise($data, $key) { $keyhash = $this->hash($key); $keylen = strlen($keyhash); @@ -399,11 +384,10 @@ class CI_Encrypt { * * Function description * - * @access public * @param type * @return type */ - function _remove_cipher_noise($data, $key) + protected function _remove_cipher_noise($data, $key) { $keyhash = $this->hash($key); $keylen = strlen($keyhash); @@ -434,13 +418,13 @@ class CI_Encrypt { /** * Set the Mcrypt Cipher * - * @access public * @param constant * @return string */ - function set_cipher($cipher) + public function set_cipher($cipher) { $this->_mcrypt_cipher = $cipher; + return $this; } // -------------------------------------------------------------------- @@ -448,13 +432,13 @@ class CI_Encrypt { /** * Set the Mcrypt Mode * - * @access public * @param constant * @return string */ function set_mode($mode) { $this->_mcrypt_mode = $mode; + return $this; } // -------------------------------------------------------------------- @@ -462,10 +446,9 @@ class CI_Encrypt { /** * Get Mcrypt cipher Value * - * @access private * @return string */ - function _get_cipher() + protected function _get_cipher() { if ($this->_mcrypt_cipher == '') { @@ -480,10 +463,9 @@ class CI_Encrypt { /** * Get Mcrypt Mode Value * - * @access private * @return string */ - function _get_mode() + protected function _get_mode() { if ($this->_mcrypt_mode == '') { @@ -498,11 +480,10 @@ class CI_Encrypt { /** * Set the Hash type * - * @access public * @param string * @return string */ - function set_hash($type = 'sha1') + public function set_hash($type = 'sha1') { $this->_hash_type = ($type != 'sha1' AND $type != 'md5') ? 'sha1' : $type; } @@ -512,45 +493,13 @@ class CI_Encrypt { /** * Hash encode a string * - * @access public * @param string * @return string */ - function hash($str) + public function hash($str) { - return ($this->_hash_type == 'sha1') ? $this->sha1($str) : md5($str); + return ($this->_hash_type == 'sha1') ? sha1($str) : md5($str); } - - // -------------------------------------------------------------------- - - /** - * Generate an SHA1 Hash - * - * @access public - * @param string - * @return string - */ - function sha1($str) - { - if ( ! function_exists('sha1')) - { - if ( ! function_exists('mhash')) - { - require_once(BASEPATH.'libraries/Sha1.php'); - $SH = new CI_SHA; - return $SH->generate($str); - } - else - { - return bin2hex(mhash(MHASH_SHA1, $str)); - } - } - else - { - return sha1($str); - } - } - } // END CI_Encrypt class |