add error check of aes_encrypt()

[Hxinrong]

Contribution description

sys/random/fortuna/fortuna.c:add error check of aes_encrypt() I'm not sure which exact value should be returned when aes_encrypt() is not on success. I just return the return value of it.

Issues/PRs references

Addresses parts of #15524

[fjmolinas]

ping @Hxinrong! :)

[PeterKietzmann]

@basilfx you put a change request on this PR. What did you want changed?

[basilfx]

@PeterKietzmann I think that it should not return res but return -3 (or another negative value) if aes_encrypt != 1.

The documentation states that aes_encrypt either returns 1 or a negative value. Returning res could be a problem if aes_encrypt would return something else (due to an API change, another implementation, etc).

[Teufelchen1]

@basilfx could you give it another look?

[riot-ci]

Murdock results

:heavy_check_mark: PASSED

bf3c038fa97d83561f47c48732eb7bef45291570 sys/random/fortuna/fortuna.c:add error check of aes_encrypt()

Success	Failures	Total	Runtime
8629	0	8629	11m:10s

Artifacts

• Documentation preview