On Mo, 2015-03-16 at 11:15 +0100, Jean-Christophe PLAGNIOL-VILLARD wrote: > We will use "barebox_password" as salt and 10000 round to generate a > 64 bytes key. The purpose of a salt is to protect a against dictionary or rainbow-table (precomputed) attacks. That means that the Salt must be randomly generated and saved with the password. For setting a new password in barebox, even a low entropy salt will make attacks significantly more expensive. So we should add some entropy from user interaction timing in that case. For hashing a password at compile time, we should get the salt from the host system. Regards, Jan -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
