| Message ID | 20210915051546.500-3-masahisa.kojima@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Enhance Measured Boot | expand |
On 9/15/21 7:15 AM, Masahisa Kojima wrote: > This commit adds the UEFI GPT disk partition topology > measurement required in TCG PC Client PFP Spec. Thanks for looking into the missing parts of TCG measurement in U-Boot. The requirements in the TCG PC Client PFP Spec are strange. It does not explicitly say how to handle multiple block devices. Did the authors never enjoy the pleasure of a second disk drive? With your implementation you would measure the GPT table of the SD-card from which you load Shim or GRUB but would not care about the GPT of the NVMe drive with your OS. A clarification by the TCG standards committee would be helpful. After this series "10.2.7 DEVICE_SECURITY_EVENT_DATA Structure" still needs to be covered. Best regards Heinrich > > Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> > --- > include/blk.h | 3 + > include/efi_loader.h | 2 +- > include/efi_tcg2.h | 12 +++ > lib/efi_loader/efi_boottime.c | 2 +- > lib/efi_loader/efi_tcg2.c | 175 +++++++++++++++++++++++++++++++++- > 5 files changed, 191 insertions(+), 3 deletions(-) > > diff --git a/include/blk.h b/include/blk.h > index 19bab081c2..f0cc7ca1a2 100644 > --- a/include/blk.h > +++ b/include/blk.h > @@ -45,6 +45,9 @@ enum if_type { > #define BLK_PRD_SIZE 20 > #define BLK_REV_SIZE 8 > > +#define PART_FORMAT_PCAT 0x1 > +#define PART_FORMAT_GPT 0x2 > + > /* > * Identifies the partition table type (ie. MBR vs GPT GUID) signature > */ > diff --git a/include/efi_loader.h b/include/efi_loader.h > index 13f0c24058..dbcc296e01 100644 > --- a/include/efi_loader.h > +++ b/include/efi_loader.h > @@ -503,7 +503,7 @@ efi_status_t efi_init_variables(void); > void efi_variables_boot_exit_notify(void); > efi_status_t efi_tcg2_notify_exit_boot_services_failed(void); > /* Measure efi application invocation */ > -efi_status_t efi_tcg2_measure_efi_app_invocation(void); > +efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *handle); > /* Measure efi application exit */ > efi_status_t efi_tcg2_measure_efi_app_exit(void); > /* Called by bootefi to initialize root node */ > diff --git a/include/efi_tcg2.h b/include/efi_tcg2.h > index da33f8a1d0..33257fa96b 100644 > --- a/include/efi_tcg2.h > +++ b/include/efi_tcg2.h > @@ -230,6 +230,18 @@ struct smbios_handoff_table_pointers2 { > struct efi_configuration_table table_entry[1]; > } __packed; > > +/** > + * struct tdUEFI_GPT_DATA - event log structure of industry standard tables > + * @uefi_partition_header: gpt partition header > + * @number_of_partitions: the number of partition > + * @partitions: partition entries > + */ > +struct efi_gpt_data { > + gpt_header uefi_partition_header; > + u64 number_of_partitions; > + gpt_entry partitions[]; > +} __packed; > + > struct efi_tcg2_protocol { > efi_status_t (EFIAPI * get_capability)(struct efi_tcg2_protocol *this, > struct efi_tcg2_boot_service_capability *capability); > diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c > index 701e2212c8..bf5661e1ee 100644 > --- a/lib/efi_loader/efi_boottime.c > +++ b/lib/efi_loader/efi_boottime.c > @@ -3003,7 +3003,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, > > if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) { > if (image_obj->image_type == IMAGE_SUBSYSTEM_EFI_APPLICATION) { > - ret = efi_tcg2_measure_efi_app_invocation(); > + ret = efi_tcg2_measure_efi_app_invocation(image_obj); > if (ret != EFI_SUCCESS) { > log_warning("tcg2 measurement fails(0x%lx)\n", > ret); > diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c > index 7f47998a55..35810615ed 100644 > --- a/lib/efi_loader/efi_tcg2.c > +++ b/lib/efi_loader/efi_tcg2.c > @@ -1525,12 +1525,181 @@ static void *search_smbios_table(void) > return NULL; > } > > +/** > + * search_gpt_dp_node() - search gpt device path node > + * > + * @device_path: device path > + * > + * Return: pointer to the gpt device path node > + */ > +static struct > +efi_device_path *search_gpt_dp_node(struct efi_device_path *device_path) > +{ > + struct efi_device_path *dp = device_path; > + > + while (dp) { > + if (dp->type == DEVICE_PATH_TYPE_MEDIA_DEVICE && > + dp->sub_type == DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH) { > + struct efi_device_path_hard_drive_path *hd_dp = > + (struct efi_device_path_hard_drive_path *)dp; > + > + if (hd_dp->partmap_type == PART_FORMAT_GPT && > + hd_dp->signature_type == SIG_TYPE_GUID) > + return dp; > + } > + dp = efi_dp_next(dp); > + } > + > + return NULL; > +} > + > +/** > + * tcg2_measure_gpt_table() - measure gpt table > + * > + * @dev: TPM device > + * @loaded_image: handle to the loaded image > + * > + * Return: status code > + */ > +static efi_status_t > +tcg2_measure_gpt_data(struct udevice *dev, > + struct efi_loaded_image_obj *loaded_image) > +{ > + efi_status_t ret; > + efi_handle_t handle; > + struct efi_handler *dp_handler; > + struct efi_device_path *orig_device_path; > + struct efi_device_path *device_path; > + struct efi_device_path *dp; > + struct efi_block_io *block_io; > + struct efi_gpt_data *event = NULL; > + efi_guid_t null_guid = NULL_GUID; > + gpt_header *orig_gpt_h = NULL; > + gpt_entry *orig_gpt_e = NULL; > + gpt_header *gpt_h = NULL; > + gpt_entry *entry = NULL; > + gpt_entry *gpt_e; > + u32 num_of_valid_entry = 0; > + u32 event_size; > + u32 i; > + u32 total_gpt_entry_size; > + > + ret = efi_search_protocol(&loaded_image->header, > + &efi_guid_loaded_image_device_path, > + &dp_handler); > + if (ret != EFI_SUCCESS) > + return ret; > + > + orig_device_path = dp_handler->protocol_interface; > + device_path = efi_dp_dup(orig_device_path); > + if (!device_path) > + return EFI_OUT_OF_RESOURCES; > + > + dp = search_gpt_dp_node(device_path); > + if (!dp) { > + /* no GPT device path node found, skip GPT measurement */ > + ret = EFI_SUCCESS; > + goto out1; > + } > + > + /* read GPT header */ > + dp->type = DEVICE_PATH_TYPE_END; > + dp->sub_type = DEVICE_PATH_SUB_TYPE_END; > + dp = device_path; > + ret = EFI_CALL(systab.boottime->locate_device_path(&efi_block_io_guid, > + &dp, &handle)); > + if (ret != EFI_SUCCESS) > + goto out1; > + > + ret = EFI_CALL(efi_handle_protocol(handle, > + &efi_block_io_guid, (void **)&block_io)); > + if (ret != EFI_SUCCESS) > + goto out1; > + > + orig_gpt_h = calloc(1, (block_io->media->block_size + block_io->media->io_align)); > + if (!orig_gpt_h) { > + ret = EFI_OUT_OF_RESOURCES; > + goto out2; > + } > + > + gpt_h = (gpt_header *)ALIGN((uintptr_t)orig_gpt_h, block_io->media->io_align); > + ret = block_io->read_blocks(block_io, block_io->media->media_id, 1, > + block_io->media->block_size, gpt_h); > + if (ret != EFI_SUCCESS) > + goto out2; > + > + /* read GPT entry */ > + total_gpt_entry_size = gpt_h->num_partition_entries * > + gpt_h->sizeof_partition_entry; > + orig_gpt_e = calloc(1, total_gpt_entry_size + block_io->media->io_align); > + entry = (void *)ALIGN((uintptr_t)orig_gpt_e, block_io->media->io_align); > + if (!entry) { > + ret = EFI_OUT_OF_RESOURCES; > + goto out2; > + } > + > + ret = block_io->read_blocks(block_io, block_io->media->media_id, > + gpt_h->partition_entry_lba, > + total_gpt_entry_size, entry); > + if (ret != EFI_SUCCESS) > + goto out2; > + > + /* count valid GPT entry */ > + gpt_e = entry; > + for (i = 0; i < gpt_h->num_partition_entries; i++) { > + if (guidcmp(&null_guid, &gpt_e->partition_type_guid)) > + num_of_valid_entry++; > + > + gpt_e = (gpt_entry *)((u8 *)gpt_e + gpt_h->sizeof_partition_entry); > + } > + > + /* prepare event data for measurement */ > + event_size = sizeof(struct efi_gpt_data) + > + (num_of_valid_entry * gpt_h->sizeof_partition_entry); > + event = calloc(1, event_size); > + if (!event) { > + ret = EFI_OUT_OF_RESOURCES; > + goto out2; > + } > + memcpy(event, gpt_h, sizeof(gpt_header)); > + put_unaligned_le64(num_of_valid_entry, &event->number_of_partitions); > + > + /* copy valid GPT entry */ > + gpt_e = entry; > + num_of_valid_entry = 0; > + for (i = 0; i < gpt_h->num_partition_entries; i++) { > + if (guidcmp(&null_guid, &gpt_e->partition_type_guid)) { > + memcpy((u8 *)event->partitions + > + (num_of_valid_entry * gpt_h->sizeof_partition_entry), > + gpt_e, gpt_h->sizeof_partition_entry); > + num_of_valid_entry++; > + } > + > + gpt_e = (gpt_entry *)((u8 *)gpt_e + gpt_h->sizeof_partition_entry); > + } > + > + ret = tcg2_measure_event(dev, 5, EV_EFI_GPT_EVENT, event_size, (u8 *)event); > + if (ret != EFI_SUCCESS) > + goto out2; > + > +out2: > + EFI_CALL(efi_close_protocol((efi_handle_t)block_io, &efi_block_io_guid, > + NULL, NULL)); > + free(orig_gpt_h); > + free(orig_gpt_e); > + free(event); > +out1: > + efi_free_pool(device_path); > + > + return ret; > +} > + > /** > * efi_tcg2_measure_efi_app_invocation() - measure efi app invocation > * > * Return: status code > */ > -efi_status_t efi_tcg2_measure_efi_app_invocation(void) > +efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *handle) > { > efi_status_t ret; > u32 pcr_index; > @@ -1569,6 +1738,10 @@ efi_status_t efi_tcg2_measure_efi_app_invocation(void) > goto out; > } > > + ret = tcg2_measure_gpt_data(dev, handle); > + if (ret != EFI_SUCCESS) > + goto out; > + > tcg2_efi_app_invoked = true; > out: > return ret; >
On Thu, 16 Sept 2021 at 16:29, Heinrich Schuchardt <xypron.glpk@gmx.de> wrote: > > > > On 9/15/21 7:15 AM, Masahisa Kojima wrote: > > This commit adds the UEFI GPT disk partition topology > > measurement required in TCG PC Client PFP Spec. > > Thanks for looking into the missing parts of TCG measurement in U-Boot. > > The requirements in the TCG PC Client PFP Spec are strange. It does not > explicitly say how to handle multiple block devices. Did the authors > never enjoy the pleasure of a second disk drive? Yes, I had same question of this GPT measurement required in TCG spec. I refer EDK2 implementation, GPT is measured only once[*1]. [*1] https://github.com/tianocore/edk2/blob/master/SecurityPkg/Library/DxeTpm2MeasureBootLib/DxeTpm2MeasureBootLib.c#L46 > > With your implementation you would measure the GPT table of the SD-card > from which you load Shim or GRUB but would not care about the GPT of the > NVMe drive with your OS. > > A clarification by the TCG standards committee would be helpful. We need to find the right person to access. > > After this series "10.2.7 DEVICE_SECURITY_EVENT_DATA Structure" still > needs to be covered. I'm trying to cover all "MUST" and non-platform specific requirement, and this is completed with this patch series. DEVICE_SECURITY_EVENT_DATA is "should" requirement. In addition, DEVICE_SECURITY_EVENT_DATA is not implemented in EDK2(but it is not the reason u-boot will not support this event anyway). Thanks, Masahisa Kojima > > Best regards > > Heinrich > > > > > Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> > > --- > > include/blk.h | 3 + > > include/efi_loader.h | 2 +- > > include/efi_tcg2.h | 12 +++ > > lib/efi_loader/efi_boottime.c | 2 +- > > lib/efi_loader/efi_tcg2.c | 175 +++++++++++++++++++++++++++++++++- > > 5 files changed, 191 insertions(+), 3 deletions(-) > > > > diff --git a/include/blk.h b/include/blk.h > > index 19bab081c2..f0cc7ca1a2 100644 > > --- a/include/blk.h > > +++ b/include/blk.h > > @@ -45,6 +45,9 @@ enum if_type { > > #define BLK_PRD_SIZE 20 > > #define BLK_REV_SIZE 8 > > > > +#define PART_FORMAT_PCAT 0x1 > > +#define PART_FORMAT_GPT 0x2 > > + > > /* > > * Identifies the partition table type (ie. MBR vs GPT GUID) signature > > */ > > diff --git a/include/efi_loader.h b/include/efi_loader.h > > index 13f0c24058..dbcc296e01 100644 > > --- a/include/efi_loader.h > > +++ b/include/efi_loader.h > > @@ -503,7 +503,7 @@ efi_status_t efi_init_variables(void); > > void efi_variables_boot_exit_notify(void); > > efi_status_t efi_tcg2_notify_exit_boot_services_failed(void); > > /* Measure efi application invocation */ > > -efi_status_t efi_tcg2_measure_efi_app_invocation(void); > > +efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *handle); > > /* Measure efi application exit */ > > efi_status_t efi_tcg2_measure_efi_app_exit(void); > > /* Called by bootefi to initialize root node */ > > diff --git a/include/efi_tcg2.h b/include/efi_tcg2.h > > index da33f8a1d0..33257fa96b 100644 > > --- a/include/efi_tcg2.h > > +++ b/include/efi_tcg2.h > > @@ -230,6 +230,18 @@ struct smbios_handoff_table_pointers2 { > > struct efi_configuration_table table_entry[1]; > > } __packed; > > > > +/** > > + * struct tdUEFI_GPT_DATA - event log structure of industry standard tables > > + * @uefi_partition_header: gpt partition header > > + * @number_of_partitions: the number of partition > > + * @partitions: partition entries > > + */ > > +struct efi_gpt_data { > > + gpt_header uefi_partition_header; > > + u64 number_of_partitions; > > + gpt_entry partitions[]; > > +} __packed; > > + > > struct efi_tcg2_protocol { > > efi_status_t (EFIAPI * get_capability)(struct efi_tcg2_protocol *this, > > struct efi_tcg2_boot_service_capability *capability); > > diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c > > index 701e2212c8..bf5661e1ee 100644 > > --- a/lib/efi_loader/efi_boottime.c > > +++ b/lib/efi_loader/efi_boottime.c > > @@ -3003,7 +3003,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, > > > > if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) { > > if (image_obj->image_type == IMAGE_SUBSYSTEM_EFI_APPLICATION) { > > - ret = efi_tcg2_measure_efi_app_invocation(); > > + ret = efi_tcg2_measure_efi_app_invocation(image_obj); > > if (ret != EFI_SUCCESS) { > > log_warning("tcg2 measurement fails(0x%lx)\n", > > ret); > > diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c > > index 7f47998a55..35810615ed 100644 > > --- a/lib/efi_loader/efi_tcg2.c > > +++ b/lib/efi_loader/efi_tcg2.c > > @@ -1525,12 +1525,181 @@ static void *search_smbios_table(void) > > return NULL; > > } > > > > +/** > > + * search_gpt_dp_node() - search gpt device path node > > + * > > + * @device_path: device path > > + * > > + * Return: pointer to the gpt device path node > > + */ > > +static struct > > +efi_device_path *search_gpt_dp_node(struct efi_device_path *device_path) > > +{ > > + struct efi_device_path *dp = device_path; > > + > > + while (dp) { > > + if (dp->type == DEVICE_PATH_TYPE_MEDIA_DEVICE && > > + dp->sub_type == DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH) { > > + struct efi_device_path_hard_drive_path *hd_dp = > > + (struct efi_device_path_hard_drive_path *)dp; > > + > > + if (hd_dp->partmap_type == PART_FORMAT_GPT && > > + hd_dp->signature_type == SIG_TYPE_GUID) > > + return dp; > > + } > > + dp = efi_dp_next(dp); > > + } > > + > > + return NULL; > > +} > > + > > +/** > > + * tcg2_measure_gpt_table() - measure gpt table > > + * > > + * @dev: TPM device > > + * @loaded_image: handle to the loaded image > > + * > > + * Return: status code > > + */ > > +static efi_status_t > > +tcg2_measure_gpt_data(struct udevice *dev, > > + struct efi_loaded_image_obj *loaded_image) > > +{ > > + efi_status_t ret; > > + efi_handle_t handle; > > + struct efi_handler *dp_handler; > > + struct efi_device_path *orig_device_path; > > + struct efi_device_path *device_path; > > + struct efi_device_path *dp; > > + struct efi_block_io *block_io; > > + struct efi_gpt_data *event = NULL; > > + efi_guid_t null_guid = NULL_GUID; > > + gpt_header *orig_gpt_h = NULL; > > + gpt_entry *orig_gpt_e = NULL; > > + gpt_header *gpt_h = NULL; > > + gpt_entry *entry = NULL; > > + gpt_entry *gpt_e; > > + u32 num_of_valid_entry = 0; > > + u32 event_size; > > + u32 i; > > + u32 total_gpt_entry_size; > > + > > + ret = efi_search_protocol(&loaded_image->header, > > + &efi_guid_loaded_image_device_path, > > + &dp_handler); > > + if (ret != EFI_SUCCESS) > > + return ret; > > + > > + orig_device_path = dp_handler->protocol_interface; > > + device_path = efi_dp_dup(orig_device_path); > > + if (!device_path) > > + return EFI_OUT_OF_RESOURCES; > > + > > + dp = search_gpt_dp_node(device_path); > > + if (!dp) { > > + /* no GPT device path node found, skip GPT measurement */ > > + ret = EFI_SUCCESS; > > + goto out1; > > + } > > + > > + /* read GPT header */ > > + dp->type = DEVICE_PATH_TYPE_END; > > + dp->sub_type = DEVICE_PATH_SUB_TYPE_END; > > + dp = device_path; > > + ret = EFI_CALL(systab.boottime->locate_device_path(&efi_block_io_guid, > > + &dp, &handle)); > > + if (ret != EFI_SUCCESS) > > + goto out1; > > + > > + ret = EFI_CALL(efi_handle_protocol(handle, > > + &efi_block_io_guid, (void **)&block_io)); > > + if (ret != EFI_SUCCESS) > > + goto out1; > > + > > + orig_gpt_h = calloc(1, (block_io->media->block_size + block_io->media->io_align)); > > + if (!orig_gpt_h) { > > + ret = EFI_OUT_OF_RESOURCES; > > + goto out2; > > + } > > + > > + gpt_h = (gpt_header *)ALIGN((uintptr_t)orig_gpt_h, block_io->media->io_align); > > + ret = block_io->read_blocks(block_io, block_io->media->media_id, 1, > > + block_io->media->block_size, gpt_h); > > + if (ret != EFI_SUCCESS) > > + goto out2; > > + > > + /* read GPT entry */ > > + total_gpt_entry_size = gpt_h->num_partition_entries * > > + gpt_h->sizeof_partition_entry; > > + orig_gpt_e = calloc(1, total_gpt_entry_size + block_io->media->io_align); > > + entry = (void *)ALIGN((uintptr_t)orig_gpt_e, block_io->media->io_align); > > + if (!entry) { > > + ret = EFI_OUT_OF_RESOURCES; > > + goto out2; > > + } > > + > > + ret = block_io->read_blocks(block_io, block_io->media->media_id, > > + gpt_h->partition_entry_lba, > > + total_gpt_entry_size, entry); > > + if (ret != EFI_SUCCESS) > > + goto out2; > > + > > + /* count valid GPT entry */ > > + gpt_e = entry; > > + for (i = 0; i < gpt_h->num_partition_entries; i++) { > > + if (guidcmp(&null_guid, &gpt_e->partition_type_guid)) > > + num_of_valid_entry++; > > + > > + gpt_e = (gpt_entry *)((u8 *)gpt_e + gpt_h->sizeof_partition_entry); > > + } > > + > > + /* prepare event data for measurement */ > > + event_size = sizeof(struct efi_gpt_data) + > > + (num_of_valid_entry * gpt_h->sizeof_partition_entry); > > + event = calloc(1, event_size); > > + if (!event) { > > + ret = EFI_OUT_OF_RESOURCES; > > + goto out2; > > + } > > + memcpy(event, gpt_h, sizeof(gpt_header)); > > + put_unaligned_le64(num_of_valid_entry, &event->number_of_partitions); > > + > > + /* copy valid GPT entry */ > > + gpt_e = entry; > > + num_of_valid_entry = 0; > > + for (i = 0; i < gpt_h->num_partition_entries; i++) { > > + if (guidcmp(&null_guid, &gpt_e->partition_type_guid)) { > > + memcpy((u8 *)event->partitions + > > + (num_of_valid_entry * gpt_h->sizeof_partition_entry), > > + gpt_e, gpt_h->sizeof_partition_entry); > > + num_of_valid_entry++; > > + } > > + > > + gpt_e = (gpt_entry *)((u8 *)gpt_e + gpt_h->sizeof_partition_entry); > > + } > > + > > + ret = tcg2_measure_event(dev, 5, EV_EFI_GPT_EVENT, event_size, (u8 *)event); > > + if (ret != EFI_SUCCESS) > > + goto out2; > > + > > +out2: > > + EFI_CALL(efi_close_protocol((efi_handle_t)block_io, &efi_block_io_guid, > > + NULL, NULL)); > > + free(orig_gpt_h); > > + free(orig_gpt_e); > > + free(event); > > +out1: > > + efi_free_pool(device_path); > > + > > + return ret; > > +} > > + > > /** > > * efi_tcg2_measure_efi_app_invocation() - measure efi app invocation > > * > > * Return: status code > > */ > > -efi_status_t efi_tcg2_measure_efi_app_invocation(void) > > +efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *handle) > > { > > efi_status_t ret; > > u32 pcr_index; > > @@ -1569,6 +1738,10 @@ efi_status_t efi_tcg2_measure_efi_app_invocation(void) > > goto out; > > } > > > > + ret = tcg2_measure_gpt_data(dev, handle); > > + if (ret != EFI_SUCCESS) > > + goto out; > > + > > tcg2_efi_app_invoked = true; > > out: > > return ret; > >
diff --git a/include/blk.h b/include/blk.h index 19bab081c2..f0cc7ca1a2 100644 --- a/include/blk.h +++ b/include/blk.h @@ -45,6 +45,9 @@ enum if_type { #define BLK_PRD_SIZE 20 #define BLK_REV_SIZE 8 +#define PART_FORMAT_PCAT 0x1 +#define PART_FORMAT_GPT 0x2 + /* * Identifies the partition table type (ie. MBR vs GPT GUID) signature */ diff --git a/include/efi_loader.h b/include/efi_loader.h index 13f0c24058..dbcc296e01 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -503,7 +503,7 @@ efi_status_t efi_init_variables(void); void efi_variables_boot_exit_notify(void); efi_status_t efi_tcg2_notify_exit_boot_services_failed(void); /* Measure efi application invocation */ -efi_status_t efi_tcg2_measure_efi_app_invocation(void); +efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *handle); /* Measure efi application exit */ efi_status_t efi_tcg2_measure_efi_app_exit(void); /* Called by bootefi to initialize root node */ diff --git a/include/efi_tcg2.h b/include/efi_tcg2.h index da33f8a1d0..33257fa96b 100644 --- a/include/efi_tcg2.h +++ b/include/efi_tcg2.h @@ -230,6 +230,18 @@ struct smbios_handoff_table_pointers2 { struct efi_configuration_table table_entry[1]; } __packed; +/** + * struct tdUEFI_GPT_DATA - event log structure of industry standard tables + * @uefi_partition_header: gpt partition header + * @number_of_partitions: the number of partition + * @partitions: partition entries + */ +struct efi_gpt_data { + gpt_header uefi_partition_header; + u64 number_of_partitions; + gpt_entry partitions[]; +} __packed; + struct efi_tcg2_protocol { efi_status_t (EFIAPI * get_capability)(struct efi_tcg2_protocol *this, struct efi_tcg2_boot_service_capability *capability); diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 701e2212c8..bf5661e1ee 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -3003,7 +3003,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, if (IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL)) { if (image_obj->image_type == IMAGE_SUBSYSTEM_EFI_APPLICATION) { - ret = efi_tcg2_measure_efi_app_invocation(); + ret = efi_tcg2_measure_efi_app_invocation(image_obj); if (ret != EFI_SUCCESS) { log_warning("tcg2 measurement fails(0x%lx)\n", ret); diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c index 7f47998a55..35810615ed 100644 --- a/lib/efi_loader/efi_tcg2.c +++ b/lib/efi_loader/efi_tcg2.c @@ -1525,12 +1525,181 @@ static void *search_smbios_table(void) return NULL; } +/** + * search_gpt_dp_node() - search gpt device path node + * + * @device_path: device path + * + * Return: pointer to the gpt device path node + */ +static struct +efi_device_path *search_gpt_dp_node(struct efi_device_path *device_path) +{ + struct efi_device_path *dp = device_path; + + while (dp) { + if (dp->type == DEVICE_PATH_TYPE_MEDIA_DEVICE && + dp->sub_type == DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH) { + struct efi_device_path_hard_drive_path *hd_dp = + (struct efi_device_path_hard_drive_path *)dp; + + if (hd_dp->partmap_type == PART_FORMAT_GPT && + hd_dp->signature_type == SIG_TYPE_GUID) + return dp; + } + dp = efi_dp_next(dp); + } + + return NULL; +} + +/** + * tcg2_measure_gpt_table() - measure gpt table + * + * @dev: TPM device + * @loaded_image: handle to the loaded image + * + * Return: status code + */ +static efi_status_t +tcg2_measure_gpt_data(struct udevice *dev, + struct efi_loaded_image_obj *loaded_image) +{ + efi_status_t ret; + efi_handle_t handle; + struct efi_handler *dp_handler; + struct efi_device_path *orig_device_path; + struct efi_device_path *device_path; + struct efi_device_path *dp; + struct efi_block_io *block_io; + struct efi_gpt_data *event = NULL; + efi_guid_t null_guid = NULL_GUID; + gpt_header *orig_gpt_h = NULL; + gpt_entry *orig_gpt_e = NULL; + gpt_header *gpt_h = NULL; + gpt_entry *entry = NULL; + gpt_entry *gpt_e; + u32 num_of_valid_entry = 0; + u32 event_size; + u32 i; + u32 total_gpt_entry_size; + + ret = efi_search_protocol(&loaded_image->header, + &efi_guid_loaded_image_device_path, + &dp_handler); + if (ret != EFI_SUCCESS) + return ret; + + orig_device_path = dp_handler->protocol_interface; + device_path = efi_dp_dup(orig_device_path); + if (!device_path) + return EFI_OUT_OF_RESOURCES; + + dp = search_gpt_dp_node(device_path); + if (!dp) { + /* no GPT device path node found, skip GPT measurement */ + ret = EFI_SUCCESS; + goto out1; + } + + /* read GPT header */ + dp->type = DEVICE_PATH_TYPE_END; + dp->sub_type = DEVICE_PATH_SUB_TYPE_END; + dp = device_path; + ret = EFI_CALL(systab.boottime->locate_device_path(&efi_block_io_guid, + &dp, &handle)); + if (ret != EFI_SUCCESS) + goto out1; + + ret = EFI_CALL(efi_handle_protocol(handle, + &efi_block_io_guid, (void **)&block_io)); + if (ret != EFI_SUCCESS) + goto out1; + + orig_gpt_h = calloc(1, (block_io->media->block_size + block_io->media->io_align)); + if (!orig_gpt_h) { + ret = EFI_OUT_OF_RESOURCES; + goto out2; + } + + gpt_h = (gpt_header *)ALIGN((uintptr_t)orig_gpt_h, block_io->media->io_align); + ret = block_io->read_blocks(block_io, block_io->media->media_id, 1, + block_io->media->block_size, gpt_h); + if (ret != EFI_SUCCESS) + goto out2; + + /* read GPT entry */ + total_gpt_entry_size = gpt_h->num_partition_entries * + gpt_h->sizeof_partition_entry; + orig_gpt_e = calloc(1, total_gpt_entry_size + block_io->media->io_align); + entry = (void *)ALIGN((uintptr_t)orig_gpt_e, block_io->media->io_align); + if (!entry) { + ret = EFI_OUT_OF_RESOURCES; + goto out2; + } + + ret = block_io->read_blocks(block_io, block_io->media->media_id, + gpt_h->partition_entry_lba, + total_gpt_entry_size, entry); + if (ret != EFI_SUCCESS) + goto out2; + + /* count valid GPT entry */ + gpt_e = entry; + for (i = 0; i < gpt_h->num_partition_entries; i++) { + if (guidcmp(&null_guid, &gpt_e->partition_type_guid)) + num_of_valid_entry++; + + gpt_e = (gpt_entry *)((u8 *)gpt_e + gpt_h->sizeof_partition_entry); + } + + /* prepare event data for measurement */ + event_size = sizeof(struct efi_gpt_data) + + (num_of_valid_entry * gpt_h->sizeof_partition_entry); + event = calloc(1, event_size); + if (!event) { + ret = EFI_OUT_OF_RESOURCES; + goto out2; + } + memcpy(event, gpt_h, sizeof(gpt_header)); + put_unaligned_le64(num_of_valid_entry, &event->number_of_partitions); + + /* copy valid GPT entry */ + gpt_e = entry; + num_of_valid_entry = 0; + for (i = 0; i < gpt_h->num_partition_entries; i++) { + if (guidcmp(&null_guid, &gpt_e->partition_type_guid)) { + memcpy((u8 *)event->partitions + + (num_of_valid_entry * gpt_h->sizeof_partition_entry), + gpt_e, gpt_h->sizeof_partition_entry); + num_of_valid_entry++; + } + + gpt_e = (gpt_entry *)((u8 *)gpt_e + gpt_h->sizeof_partition_entry); + } + + ret = tcg2_measure_event(dev, 5, EV_EFI_GPT_EVENT, event_size, (u8 *)event); + if (ret != EFI_SUCCESS) + goto out2; + +out2: + EFI_CALL(efi_close_protocol((efi_handle_t)block_io, &efi_block_io_guid, + NULL, NULL)); + free(orig_gpt_h); + free(orig_gpt_e); + free(event); +out1: + efi_free_pool(device_path); + + return ret; +} + /** * efi_tcg2_measure_efi_app_invocation() - measure efi app invocation * * Return: status code */ -efi_status_t efi_tcg2_measure_efi_app_invocation(void) +efi_status_t efi_tcg2_measure_efi_app_invocation(struct efi_loaded_image_obj *handle) { efi_status_t ret; u32 pcr_index; @@ -1569,6 +1738,10 @@ efi_status_t efi_tcg2_measure_efi_app_invocation(void) goto out; } + ret = tcg2_measure_gpt_data(dev, handle); + if (ret != EFI_SUCCESS) + goto out; + tcg2_efi_app_invoked = true; out: return ret;
This commit adds the UEFI GPT disk partition topology measurement required in TCG PC Client PFP Spec. Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> --- include/blk.h | 3 + include/efi_loader.h | 2 +- include/efi_tcg2.h | 12 +++ lib/efi_loader/efi_boottime.c | 2 +- lib/efi_loader/efi_tcg2.c | 175 +++++++++++++++++++++++++++++++++- 5 files changed, 191 insertions(+), 3 deletions(-) -- 2.17.1