Configuration Zone Write

[imuguruza]

Hey there!

I have started using hashlet to configure and use an ATSHA294 device. I was wondering if personalize command allows you to write the Configuration Zone bytes.

Thanks

[jbdatko]

Do you mean AtSHA204? If so, than personalize does set the configuration
zone and otp zone. However, it doesn't let you specify a different
configuration than my defaults.

I've been playing with the idea of a user supplied XML file for the
configuration which would let the user have much more flexibility, but it's
still a work in progress.
On Oct 16, 2014 4:19 AM, "Iñigo Muguruza" [email protected] wrote:

Hey there!

I have started using hashlet to configure and use an ATSHA294 device. I
was wondering if personalize command allows you to write the
Configuration Zone bytes.

Thanks

—
Reply to this email directly or view it on GitHub
#38.

[imuguruza]

OK, thanks for the rapid answer! First, I think I'll give a try to your settings. I think it would be great to have a way of configurating the zones. Thanks for this great tool!

[jbdatko]

Just be aware that once you write the configuration zone (or personalize) it can't be undone. This XML feature exists on a branch in libcrypti2c. My ultimate goal for this software, which I should document somewhere, is to use this kernel module, libcrypti2c, and then truly device features in hashlet.

[imuguruza]

That sounds great! BTW another question if you run ./hashlet personalize , instead of ./hashlet personalize -f keys.txt , where are the keys saved?

[jbdatko]

They go to ~/.hashlet.

On Thu, Oct 16, 2014 at 8:38 AM, Iñigo Muguruza [email protected]
wrote:

That sounds great! BTW another question if you run ./hashlet personalize
, instead of ./hashlet personalize -f keys.txt , where are the keys saved?

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#38 (comment).

[imuguruza]

Thanks again! If you don't mind, I have another doubt: I am sending mac command with a challenge that I have created, like this:
sudo hashlet -k 1 - c 3ACEC5DB23F39FF87B88D48D4D365E563AA2A85E929CC1BA1A164EA7B74423B mac

In order to verify later the response using the key 1. I'm not receiving any answer using my own -c, is it possible to do so??

[jbdatko]

Ok, this is probably a problem with my interface. At the moment, you can't send a challenge in directly, it will be SHA256 hashed first. If that's OK with you, than you could do:

echo 3ACEC5DB23F39FF87B88D48D4D365E563AA2A85E929CC1BA1A164EA7B74423B | hashlet mac

But that 3ac... will be SHA256'd first.

[imuguruza]

ok thanks for your support ;)

[N5066]

I have been trying to use ATSHA204.. I have personalized the chip and got the key zone from ~./hashlet. But when I run the command ./hashlet personalize -f keys.txt the error comes failed to import the key file.

Same with the mac command ./hashlet mac --file test.txt...Then it comes Failed to open file..

What could be done in both the cases