$password_fields = create_password($password, $user['salt'], $user);
return my_hash_equals($user['password'], $password_fields['password']);
|
$password_fields = create_password($password, $user['salt'], $user);
return my_hash_equals($user['password'], $password_fields['password']);
|
} }
/** * Performs a timing attack safe string comparison. * * @param string $known_string The first string to be compared. * @param string $user_string The second, user-supplied string to be compared. * @return bool Result of the comparison. */ function my_hash_equals($known_string, $user_string) { if(version_compare(PHP_VERSION, '5.6.0', '>=')) { return hash_equals($known_string, $user_string); } else { $known_string_length = my_strlen($known_string); $user_string_length = my_strlen($user_string);
if($user_string_length != $known_string_length) { return false; }
$result = 0;
for($i = 0; $i < $known_string_length; $i++) { $result |= ord($known_string[$i]) ^ ord($user_string[$i]); }
return $result === 0;
| |