FIT Verification

[Francis, Neha]

Hi Nagabhushan

+ Manorit do correct me if I'm wrong

On 2/27/2026 5:14 AM, Simon Glass wrote:
> +Neha Malcom Francis
> 
> Hi,
> 
> On Wed, 25 Feb 2026 at 01:54, Nagabhushan D <nagabhushand34 at gmail.com> wrote:
>>
>> Hi Team,
>> I am a recent graduate working in Embedded stream. Currently exploring secure booting on TI boards. I went through some of the writings on github - https://github.com/ARM-software/u-boot/blob/master/doc/uImage.FIT/signature.txt and other sources by TI. I would like to get few confusions cleared by this mail and thanks for take some time for this.

I'm linking a couple of links [0] and [1] that should clear up everything if you
haven't stumbled upon them already.

>>
>> 1. Can I try out only fitImage verification with hs fs boards only?
> 
> Neha may know about that one.

No, both GP/HS can enforce fitImage auth (check FIT_SIGNATURE_ENFORCE)

> 
>> 2. Can I try it with ti dummy keys or any other way to know if the flow/fit signing is correct?
> 
> There are tests which check signature verification using sandbox,
> which might be the easiest way to try it out. See test_fit.py

Yes sandbox testing would work, as well as building with the TI dummy key.

> 
> Regards,
> Simon

[0]
https://software-dl.ti.com/processor-sdk-linux/esd/AM62AX/latest/exports/docs/linux/Foundational_Components_Kernel_Users_Guide.html#creating-the-kernel-fitimage-for-high-security-device-gp-devices
(this is our SDK doc, just in case you need more help to follow along, more or
less the same as what the upstream docs talk about)

[1] https://docs.u-boot.org/en/latest/board/ti/k3.html#fit-signature-signing

-- 
Thanking You
Neha Malcom Francis