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- <?php
- function decrypt_string($str) {
- $pair = explode(":", $str);
- if (count($pair) == 2) {
- @$iv = base64_decode($pair[0]);
- @$encstr = base64_decode($pair[1]);
- if ($iv && $encstr) {
- $key = hash('SHA256', FEED_CRYPT_KEY, true);
- $str = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $encstr,
- MCRYPT_MODE_CBC, $iv);
- if ($str) return rtrim($str);
- }
- }
- return false;
- }
- function encrypt_string($str) {
- $key = hash('SHA256', FEED_CRYPT_KEY, true);
- $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,
- MCRYPT_MODE_CBC), MCRYPT_RAND);
- $encstr = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $str,
- MCRYPT_MODE_CBC, $iv);
- $iv_base64 = base64_encode($iv);
- $encstr_base64 = base64_encode($encstr);
- return "$iv_base64:$encstr_base64";
- }
- ?>
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