diff options
Diffstat (limited to 'tools/testing/selftests/tpm2/tpm2.py')
| -rw-r--r-- | tools/testing/selftests/tpm2/tpm2.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/tools/testing/selftests/tpm2/tpm2.py b/tools/testing/selftests/tpm2/tpm2.py index f34486cd7342..057a4f49c79d 100644 --- a/tools/testing/selftests/tpm2/tpm2.py +++ b/tools/testing/selftests/tpm2/tpm2.py @@ -56,6 +56,7 @@ TSS2_RESMGR_TPM_RC_LAYER = (11 << TSS2_RC_LAYER_SHIFT) TPM2_CAP_HANDLES = 0x00000001 TPM2_CAP_COMMANDS = 0x00000002 +TPM2_CAP_PCRS = 0x00000005 TPM2_CAP_TPM_PROPERTIES = 0x00000006 TPM2_PT_FIXED = 0x100 @@ -712,3 +713,33 @@ class Client: pt += 1 return handles + + def get_cap_pcrs(self): + pcr_banks = {} + + fmt = '>HII III' + + cmd = struct.pack(fmt, + TPM2_ST_NO_SESSIONS, + struct.calcsize(fmt), + TPM2_CC_GET_CAPABILITY, + TPM2_CAP_PCRS, 0, 1) + rsp = self.send_cmd(cmd)[10:] + _, _, cnt = struct.unpack('>BII', rsp[:9]) + rsp = rsp[9:] + + # items are TPMS_PCR_SELECTION's + for i in range(0, cnt): + hash, sizeOfSelect = struct.unpack('>HB', rsp[:3]) + rsp = rsp[3:] + + pcrSelect = 0 + if sizeOfSelect > 0: + pcrSelect, = struct.unpack('%ds' % sizeOfSelect, + rsp[:sizeOfSelect]) + rsp = rsp[sizeOfSelect:] + pcrSelect = int.from_bytes(pcrSelect, byteorder='big') + + pcr_banks[hash] = pcrSelect + + return pcr_banks |