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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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