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- <?php
-
- /* $Id: mcrypt.lib.php,v 2.3 2005/02/07 16:46:02 rabus Exp $ */
- // vim: expandtab sw=4 ts=4 sts=4:
-
- /**
- * Initialization
- */
-
- // Store the initialization vector because it will be needed for
- // further decryption. I don't think necessary to have one iv
- // per server so I don't put the server number in the cookie name.
-
- if (!isset($_COOKIE['pma_mcrypt_iv'])) {
- srand((double) microtime() * 1000000);
- $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_BLOWFISH, MCRYPT_MODE_CBC), MCRYPT_RAND);
- setcookie('pma_mcrypt_iv',
- base64_encode($iv),
- time() + (60 * 60 * 24 * 30),
- $GLOBALS['cookie_path'], '',
- $GLOBALS['is_https']);
- } else {
- $iv = base64_decode($_COOKIE['pma_mcrypt_iv']);
- }
-
- /**
- * String padding
- *
- * @param string input string
- * @param integer length of the result
- * @param string the filling string
- * @param integer padding mode
- *
- * @return string the padded string
- *
- * @access public
- */
- function full_str_pad($input, $pad_length, $pad_string = '', $pad_type = 0) {
- $str = '';
- $length = $pad_length - strlen($input);
- if ($length > 0) { // str_repeat doesn't like negatives
- if ($pad_type == STR_PAD_RIGHT) { // STR_PAD_RIGHT == 1
- $str = $input.str_repeat($pad_string, $length);
- } elseif ($pad_type == STR_PAD_BOTH) { // STR_PAD_BOTH == 2
- $str = str_repeat($pad_string, floor($length/2));
- $str .= $input;
- $str .= str_repeat($pad_string, ceil($length/2));
- } else { // defaults to STR_PAD_LEFT == 0
- $str = str_repeat($pad_string, $length).$input;
- }
- } else { // if $length is negative or zero we don't need to do anything
- $str = $input;
- }
- return $str;
- }
- /**
- * Encryption using blowfish algorithm (mcrypt)
- *
- * @param string original data
- * @param string the secret
- *
- * @return string the encrypted result
- *
- * @access public
- *
- * @author lem9
- */
- function PMA_blowfish_encrypt($data, $secret) {
- global $iv;
- // Seems we don't need the padding. Anyway if we need it,
- // we would have to replace 8 by the next 8-byte boundary.
- //$data = full_str_pad($data, 8, "\0", STR_PAD_RIGHT);
- return base64_encode(mcrypt_encrypt(MCRYPT_BLOWFISH, $secret, $data, MCRYPT_MODE_CBC, $iv));
- }
-
- /**
- * Decryption using blowfish algorithm (mcrypt)
- *
- * @param string encrypted data
- * @param string the secret
- *
- * @return string original data
- *
- * @access public
- *
- * @author lem9
- */
- function PMA_blowfish_decrypt($encdata, $secret) {
- global $iv;
- return trim(mcrypt_decrypt(MCRYPT_BLOWFISH, $secret, base64_decode($encdata), MCRYPT_MODE_CBC, $iv));
- }
-
- ?>
-