Re: identical input, different output?

[Colin Percival <cperciva@tarsnap.com>]

On 12/05/14 13:41, Arnold Reinhold wrote:
>> On Dec 5, 2014, at 3:24 PM, Colin Percival <cperciva@tarsnap.com> wrote:
>>
>> On 12/05/14 07:59, danielw@emaildoge.com wrote:
>>>> Which version of the scrypt code are you using?  If you're using the SSE2
>>>> version, are you sure that you're running on an SSE2-enabled CPU?
>>>
>>> Do you mean to say that if you run the crypto_scrypt-sse.c function on a
>>> non-SSE CPU, you will get a different result than on a SSE CPU?
>>
>> My understanding is that some non-SSE CPUs treat SSE instructions as NOPs.
> 
> If so a quick trial SSE calculation would reveal the absence, allowing an error return. Seems prudent. 

Yes, I'm planning on adding code to do that.  But I don't know if that's the
issue which Maarten ran into.

-- 
Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid