[Linux-ima-devel] ReCaculate PCR value from IMA measurement list

[Yu Xi <ge...@gm...>]

Dear all,

I'm writing a testing program to recaculate the pcr value from IMA
measurement list following the procedure below:
*
*
*
*
* {
   uchar PCR_tmp[20] = {0...0}  // the initial value of pcr assigned to zero

   for (i=0; i<MList.len; i++)
        PCR_tmp = SHA1(PCR_tmp || MList[i])  // where || means concatenation

   if (PCR == PCR_tmp)
        return OK
   else
        return INVALID
 }*
*
*
However the newly calculated value doesn't match the real PCR.
I found that some measurement enty in the list is "0000000000000000000000",
is this the reason for the problem? Could anybody help me to solve the
problem? Thank you very much.
-- 
Regards
Xi Yu (禹熹)