[TrouSerS-users] Few Doubts in TakeOwnerShip & WrapKey

[Bhanu <bha...@gm...>]

Hi,

I have downloaded trousers0.2.9.1 version, tpm-emulator from BerliOs and did
the initial setup.

I have a few doubts..

When I am trying to execute TakeOwnerShip, I noticed that,
TCSP_TakeOwnership_Internal function memsets the Public part SRK to '\0'
after req_mgr_submit_req at Line number 138.

I didn't get what is the advantage of memsetting the Public part SRK to
'\0', is it the requirement according to spec??

I tried to execute TestSuite\highlevel\Tspi_Key_WrapKey01.c, I am getting
error in obj_rsakey_get_modulus function as Public part of SRK should not be
NULL.

After commenting the memset part in TCSP_TakeOwnership_Internal, I executed
ClearOwnerShip test case, unfortunately it is not clearing the
system.datafile [My assumption is
system.data will be cleared after execution of ClearOwnerShip01.c].. I
cleared it maually and executed TakeOwnerShip command which is success and
now it is writing public part of SRK in system.data file [Previously it is
'\0']..

Now, Again i try to execute TestSuite\highlevel\Tspi_Key_WrapKey01.c, now it
was failed at Trspi_RSA_Encrypt, after some debugging i located the bug is
at keyPrivBlobLen in Tspi_Key_WrapKey is coming as 256 bytes [I think it
should be 128]. So, it was failed in Trspi_RSA_Encrypt.

Can anybody help me out where I am going wrong??

Thanks & Regards,
-Bhanu.