[LTP] [LTP v4 4/5] IMA: Add a test to verify measurement of certificate imported into a keyring

[Petr Vorel <pvorel@suse.cz>]

Hi Mimi,

...
> > +	if ! tst_is_num $KEYRING_ID; then
> > +		tst_brk TBROK "unable to parse the new keyring id ('$KEYRING_ID')"
> > +	fi
> > +

> Instead of using TST_DATAROOT, which is defined as
> "$LTPROOT/datafiles", use LTPROOT directly to define the path to the
> cert.  Adding the following will allow the test to run from the build
> directory.

>       if [ ! -f $cert_file ]; then
>               cert_file="$LTPROOT/../datafiles/ima_keys/x509_ima.der"
>       fi
Yes, this will work if you set LTPROOT to <ltp git>/testcases/kernel/security/integrity/ima/tests/:

$ cd <ltp git>/testcases/kernel/security/integrity/ima/tests/
$ LTPROOT=$PWD PATH="../../../../../lib/:.:$PATH" ./ima_keys.sh

But, according to doc [1] $LTPROOT is "Prefix for installed LTP, the default is
/opt/ltp.". Using it like this is confusing (if we want to misuse $LTPROOT, one
would expect it's a cloned git root directory). Running from git root it'd have
to be:

$ cd <ltp git>
$ LTPROOT=$PWD/testcases/kernel/security/integrity/ima/tests/ \
PATH="testcases/lib:testcases/kernel/security/integrity/ima/tests/:$PATH" ima_keys.sh

TL;DR: I'd really prefer people run IMA from installed LTP (make && make install
in both testcases/lib and testcases/kernel/security/integrity/ima/ is just enough),
but I'll add this hack to make your testing easier :). But fixing this in
tst_test.sh is really needed.

> Mimi

Kind regards,
Petr

[1] https://github.com/linux-test-project/ltp/wiki/User-Guidelines