diff options
Diffstat (limited to 'tpm.c')
| -rw-r--r-- | tpm.c | 32 |
1 files changed, 32 insertions, 0 deletions
@@ -10,6 +10,7 @@ typedef struct { UINTN measuredcount = 0; VARIABLE_RECORD *measureddata = NULL; +static BOOLEAN tpm_defective = FALSE; static BOOLEAN tpm_present(efi_tpm_protocol_t *tpm) { @@ -18,6 +19,9 @@ static BOOLEAN tpm_present(efi_tpm_protocol_t *tpm) UINT32 flags; EFI_PHYSICAL_ADDRESS eventlog, lastevent; + if (tpm_defective) + return FALSE; + caps.Size = (UINT8)sizeof(caps); efi_status = tpm->status_check(tpm, &caps, &flags, &eventlog, &lastevent); @@ -192,6 +196,12 @@ static EFI_STATUS tpm_log_event_raw(EFI_PHYSICAL_ADDRESS buf, UINTN size, (UINT64)size, TPM_ALG_SHA, event, &eventnum, &lastevent); } + if (efi_status == EFI_UNSUPPORTED) { + perror(L"Could not write TPM event: %r. Considering " + "the TPM as defective.\n", efi_status); + tpm_defective = TRUE; + efi_status = EFI_SUCCESS; + } FreePool(event); return efi_status; } @@ -353,3 +363,25 @@ fallback_should_prefer_reset(void) return EFI_NOT_FOUND; return EFI_SUCCESS; } + +#ifdef SHIM_UNIT_TEST +static void DESTRUCTOR +tpm_clean_up_measurements(void) +{ + for (UINTN i = 0; i < measuredcount; i++) { + VARIABLE_RECORD *vr = &measureddata[i]; + + if (vr->VariableName) + FreePool(vr->VariableName); + if (vr->VendorGuid) + FreePool(vr->VendorGuid); + if (vr->Data) + FreePool(vr->Data); + } + if (measureddata) + FreePool(measureddata); + + measuredcount = 0; + measureddata = NULL; +} +#endif |