phc-discussions - Re: [PHC] Gambit code

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Date: Mon, 14 Apr 2014 11:55:17 -0500 (CDT)
From: Steve Thomas <steve@...tu.com>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] Gambit code

> On April 14, 2014 at 11:36 AM Bill Cox <waywardgeek@...il.com> wrote:
>
> The optimizer will probably remove this call to memset anyway :-)
>
> I thought about reporting this as a bug in the various entries that try to
> clear a password or memory using memset, but it still conveys the intent of
> the author.  When we get down to just a few entries left standing, I think
> the authors should tweak their entries to do a better job clearing memory.

I like my way :)
...
        // Clean up
        // TODO: find a secure wipe function
        memset(data, 0, sizeof(data));
        memset(key,  0, sizeof(key));
        memset(mem,  0, sizeof(uint32_t) * DATA_SIZE * memSize);
...

P.S. I am aware that my function "sha512Block()" doesn't clear sensitive
data.