[python] Remove unneeded attrs in get_mrenclave_and_manifest()

The only enclave attributes required for the SGX enclave measurement are
the enclave size, the number of enclave threads and whether EDMM is
enabled. Other attributes such as ISV_PROD_ID, ISV_SVN, XFRM are not
included in the measurement.

Signed-off-by: Dmitrii Kuvaiskii <dmitrii.kuvaiskii@intel.com>

python/graminelibos/sgx_sign.py

@@ -452,21 +452,13 @@ def get_mrenclave_and_manifest(manifest_path, libpal, verbose=False):
         'enclave_size': parse_size(manifest_sgx['enclave_size']),
         'edmm_enable': manifest_sgx.get('edmm_enable', False),
         'max_threads': manifest_sgx['max_threads'],
-        'isv_prod_id': manifest_sgx['isvprodid'],
-        'isv_svn': manifest_sgx['isvsvn'],
     }
-    attr['flags'], attr['xfrms'], attr['misc_select'] = get_enclave_attributes(manifest_sgx)
 
     if verbose:
-        print('Attributes:')
+        print('Attributes (required for enclave measurement):')
         print(f'    size:        {attr["enclave_size"]:#x}')
         print(f'    edmm:        {attr["edmm_enable"]}')
         print(f'    max_threads: {attr["max_threads"]}')
-        print(f'    isv_prod_id: {attr["isv_prod_id"]}')
-        print(f'    isv_svn:     {attr["isv_svn"]}')
-        print(f'    attr.flags:  {attr["flags"]:#x}')
-        print(f'    attr.xfrm:   {attr["xfrms"]:#x}')
-        print(f'    misc_select: {attr["misc_select"]:#x}')
 
         print('SGX remote attestation:')
         attestation_type = manifest_sgx.get('remote_attestation', 'none')