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Add stronger randomness on session key generation

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Daniel Winzen
2016-11-19 06:50:57 +01:00
parent 88a91658bb
commit bcc80c468d
1 changed files with 5 additions and 1 deletions
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6
chat.php
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@ -2246,7 +2246,11 @@ function write_new_session(){
// create new session
$stmt=$db->prepare('SELECT * FROM ' . PREFIX . 'sessions WHERE session=?;');
do{
$U['session']=md5(time().mt_rand().$U['nickname']);
if(function_exists('random_bytes')){
$U['session']=bin2hex(random_bytes(16));
}else{
$U['session']=md5(uniqid($U['nickname'], true).mt_rand());
}
$stmt->execute([$U['session']]);
}while($stmt->fetch(PDO::FETCH_NUM)); // check for hash collision
if(isSet($_SERVER['HTTP_USER_AGENT'])){