lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Sat, 5 Apr 2014 18:28:01 -0400
From: Bill Cox <waywardgeek@...il.com>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] Re: Yarn issues

On Sat, Apr 5, 2014 at 5:28 PM, Evgeny Kapun <abacabadabacaba@...il.com> wrote:
> Bill Cox <waywardgeek@...> writes:
>> If I am not mistaken, he has input collisions on both salt, and a
>> parameter called "pers".  Both are padded with 0's to 8 bytes, and
>> XOR-ed onto Blake2b state, so adding additional 0's up to a total
>> length of 8 doesn't change the output.  The password is free of such
>> collisions, so this isn't a critical issue.  He also has a spelling
>> error on the last line of his README
>
> Blake2b has exactly the same kind of collisions. Even Blake has only
> fixed-width salt.

All you have to do is hash the input lengths, and problem solved.  If
you hash all the inputs, then your algorithm gets the fun (but
misleading) label "strongly secure".

Bill

Powered by blists - more mailing lists