[PATCH 00/10] Add build and target hash for test results

[Sebastian Huber]

On 24/02/2021 19:22, Gedare Bloom wrote:

> On Wed, Feb 24, 2021 at 6:57 AM Sebastian Huber
> <sebastian.huber at embedded-brains.de>  wrote:
>> This patch set adds the new directives rtems_get_build_hash() and
>> rtems_get_target_hash() which can be used to differentiate test suite
>> results.  See also the following discussion:
>>
>> https://lists.rtems.org/pipermail/devel/2020-November/063226.html
>>
>> Sebastian Huber (10):
>>    build: Generate build hash
>>    rtems: Add rtems_get_build_hash()
>>    libtest: Report build hash
>>    score: Add _IO_Base64url()
>>    score: Add Hash Handler
>>    rtems: Add rtems_get_target_hash()
>>    Add system initialization step for target hash
>>    bsps: Add default rtems_get_target_hash()
>>    libtest: Report target hash
>>    libtest: Print SHA256 hash in base64url
>>
> Is there a good reason to use SHA256 over a lighter weight algorithm?
> I guess I wonder about the overhead and value of using it.
>
> We don't need cryptographic security here, we just need a reasonably
> non-colliding checksum. The speed of hashing will matter for running
> testsuites.
SHA256 is currently the best algorithm for 32-bit targets we have in the 
RTEMS sources. It is also selected for the next Git hash. I don't think 
the time to calculate the hash really matters and I want to avoid any 
discussions if MD5 is sufficient or not.

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