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Pull request for UEFI sub-system for efi-2021-01-rc3 (2)

Browse Source 
The parameter check for UEFI service GetNextVariableName() is corrected.
 
 The dependencies of CONFIG_DFU_TFTP are simplified.
 
 The set of supported hash algorithms reported by the EFI_TCG2_PROTOCOL is
 corrected.
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Merge tag 'efi-2021-01-rc3-2' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for UEFI sub-system for efi-2021-01-rc3 (2)

The parameter check for UEFI service GetNextVariableName() is corrected.

The dependencies of CONFIG_DFU_TFTP are simplified.

The set of supported hash algorithms reported by the EFI_TCG2_PROTOCOL is
corrected.
This commit is contained in:
Tom Rini 2020-11-21 08:04:39 -05:00
commit 12e396303c
4 changed files with 101 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/dfu/Kconfig
View File

@ -20,9 +20,8 @@ config DFU_WRITE_ALT
config DFU_TFTP
bool "DFU via TFTP"
select DFU_WRITE_ALT
select DFU_OVER_TFTP
select UPDATE_COMMON
select DFU_OVER_TFTP
help
This option allows performing update of DFU-managed medium with data
sent via TFTP boot.

2
include/efi_tcg2.h
View File

@ -18,8 +18,6 @@
/* TPMV2 only */
#define TCG2_EVENT_LOG_FORMAT_TCG_2 0x00000002
/* SHA1, SHA256, SHA384, SHA512, TPM_ALG_SM3_256 */
#define MAX_HASH_COUNT 5
/* Algorithm Registry */
#define EFI_TCG2_BOOT_HASH_ALG_SHA1 0x00000001
#define EFI_TCG2_BOOT_HASH_ALG_SHA256 0x00000002

160
lib/efi_loader/efi_tcg2.c
View File

@ -30,6 +30,52 @@ DECLARE_GLOBAL_DATA_PTR;
#define properties_offset (offsetof(struct tpml_tagged_tpm_property, tpm_property) + \
offsetof(struct tpms_tagged_property, value))
struct {
u16 hash_alg;
u32 hash_mask;
} hash_algo_list[] = {
{
TPM2_ALG_SHA1,
EFI_TCG2_BOOT_HASH_ALG_SHA1,
},
{
TPM2_ALG_SHA256,
EFI_TCG2_BOOT_HASH_ALG_SHA256,
},
{
TPM2_ALG_SHA384,
EFI_TCG2_BOOT_HASH_ALG_SHA384,
},
{
TPM2_ALG_SHA512,
EFI_TCG2_BOOT_HASH_ALG_SHA512,
},
{
TPM2_ALG_SM3_256,
EFI_TCG2_BOOT_HASH_ALG_SM3_256,
},
};
#define MAX_HASH_COUNT ARRAY_SIZE(hash_algo_list)
/**
* alg_to_mask - Get a TCG hash mask for algorithms
*
* @hash_alg: TCG defined algorithm
*
* @Return: TCG hashing algorithm bitmaps, 0 if the algorithm is not supported
*/
static u32 alg_to_mask(u16 hash_alg)
{
int i;
for (i = 0; i < MAX_HASH_COUNT; i++) {
if (hash_algo_list[i].hash_alg == hash_alg)
return hash_algo_list[i].hash_mask;
}
return 0;
}
const efi_guid_t efi_guid_tcg2_protocol = EFI_TCG2_PROTOCOL_GUID;
/**
@ -44,10 +90,12 @@ const efi_guid_t efi_guid_tcg2_protocol = EFI_TCG2_PROTOCOL_GUID;
*/
__weak efi_status_t platform_get_tpm2_device(struct udevice **dev)
{
for_each_tpm_device((*dev)) {
for_each_tpm_device(*dev) {
/* Only support TPMv2 devices */
if (tpm_get_version(*dev) == TPM_V2)
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
@ -242,36 +290,14 @@ static int tpm2_get_pcr_info(struct udevice *dev, u32 *supported_pcr,
}
for (i = 0; i < pcrs.count; i++) {
switch (pcrs.selection[i].hash) {
case TPM2_ALG_SHA1:
*supported_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA1;
u32 hash_mask = alg_to_mask(pcrs.selection[i].hash);
if (hash_mask) {
*supported_pcr |= hash_mask;
if (is_active_pcr(&pcrs.selection[i]))
*active_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA1;
break;
case TPM2_ALG_SHA256:
*supported_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA256;
if (is_active_pcr(&pcrs.selection[i]))
*active_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA256;
break;
case TPM2_ALG_SHA384:
*supported_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA384;
if (is_active_pcr(&pcrs.selection[i]))
*active_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA384;
break;
case TPM2_ALG_SHA512:
*supported_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA512;
if (is_active_pcr(&pcrs.selection[i]))
*active_pcr |= EFI_TCG2_BOOT_HASH_ALG_SHA512;
break;
case TPM2_ALG_SM3_256:
*supported_pcr |= EFI_TCG2_BOOT_HASH_ALG_SM3_256;
if (is_active_pcr(&pcrs.selection[i]))
*active_pcr |= EFI_TCG2_BOOT_HASH_ALG_SM3_256;
break;
default:
EFI_PRINT("Unknown algorithm %x\n",
pcrs.selection[i].hash);
break;
*active_pcr |= hash_mask;
} else {
EFI_PRINT("Unknown algorithm %x\n", pcrs.selection[i].hash);
}
}
@ -283,7 +309,7 @@ out:
}
/**
* get_capability() - protocol capability information and state information
* efi_tcg2_get_capability() - protocol capability information and state information
*
* @this: TCG2 protocol instance
* @capability: caller allocated memory with size field to the size of
@ -292,8 +318,8 @@ out:
* Return: status code
*/
static efi_status_t EFIAPI
get_capability(struct efi_tcg2_protocol *this,
struct efi_tcg2_boot_service_capability *capability)
efi_tcg2_get_capability(struct efi_tcg2_protocol *this,
struct efi_tcg2_boot_service_capability *capability)
{
struct udevice *dev;
efi_status_t efi_ret;
@ -381,7 +407,8 @@ out:
}
/**
* get_eventlog() - retrieve the the address of an event log and its last entry
* efi_tcg2_get_eventlog() - retrieve the the address of an event log and its
* last entry
*
* @this: TCG2 protocol instance
* @log_format: type of event log format
@ -395,15 +422,16 @@ out:
* Return: status code
*/
static efi_status_t EFIAPI
get_eventlog(struct efi_tcg2_protocol *this,
efi_tcg_event_log_format log_format, u64 *event_log_location,
u64 *event_log_last_entry, bool *event_log_truncated)
efi_tcg2_get_eventlog(struct efi_tcg2_protocol *this,
efi_tcg_event_log_format log_format,
u64 *event_log_location, u64 *event_log_last_entry,
bool *event_log_truncated)
{
return EFI_UNSUPPORTED;
}
/**
* hash_log_extend_event()- extend and optionally log events
* efi_tcg2_hash_log_extend_event() - extend and optionally log events
*
* @this: TCG2 protocol instance
* @flags: bitmap providing additional information on the
@ -418,15 +446,15 @@ get_eventlog(struct efi_tcg2_protocol *this,
* Return: status code
*/
static efi_status_t EFIAPI
hash_log_extend_event(struct efi_tcg2_protocol *this, u64 flags,
u64 data_to_hash, u64 data_to_hash_len,
struct efi_tcg2_event *efi_tcg_event)
efi_tcg2_hash_log_extend_event(struct efi_tcg2_protocol *this, u64 flags,
u64 data_to_hash, u64 data_to_hash_len,
struct efi_tcg2_event *efi_tcg_event)
{
return EFI_UNSUPPORTED;
}
/**
* submit_command() - Send command to the TPM
* efi_tcg2_submit_command() - Send command to the TPM
*
* @this: TCG2 protocol instance
* @input_param_block_size: size of the TPM input parameter block
@ -437,15 +465,15 @@ hash_log_extend_event(struct efi_tcg2_protocol *this, u64 flags,
* Return: status code
*/
efi_status_t EFIAPI
submit_command(struct efi_tcg2_protocol *this, u32 input_param_block_size,
u8 *input_param_block, u32 output_param_block_size,
u8 *output_param_block)
efi_tcg2_submit_command(struct efi_tcg2_protocol *this,
u32 input_param_block_size, u8 *input_param_block,
u32 output_param_block_size, u8 *output_param_block)
{
return EFI_UNSUPPORTED;
}
/**
* get_active_pcr_banks() - returns the currently active PCR banks
* efi_tcg2_get_active_pcr_banks() - returns the currently active PCR banks
*
* @this: TCG2 protocol instance
* @active_pcr_banks: pointer for receiving the bitmap of currently
@ -454,13 +482,14 @@ submit_command(struct efi_tcg2_protocol *this, u32 input_param_block_size,
* Return: status code
*/
efi_status_t EFIAPI
get_active_pcr_banks(struct efi_tcg2_protocol *this, u32 *active_pcr_banks)
efi_tcg2_get_active_pcr_banks(struct efi_tcg2_protocol *this,
u32 *active_pcr_banks)
{
return EFI_UNSUPPORTED;
}
/**
* set_active_pcr_banks() - sets the currently active PCR banks
* efi_tcg2_set_active_pcr_banks() - sets the currently active PCR banks
*
* @this: TCG2 protocol instance
* @active_pcr_banks: bitmap of the requested active PCR banks
@ -468,14 +497,15 @@ get_active_pcr_banks(struct efi_tcg2_protocol *this, u32 *active_pcr_banks)
* Return: status code
*/
efi_status_t EFIAPI
set_active_pcr_banks(struct efi_tcg2_protocol *this, u32 active_pcr_banks)
efi_tcg2_set_active_pcr_banks(struct efi_tcg2_protocol *this,
u32 active_pcr_banks)
{
return EFI_UNSUPPORTED;
}
/**
* get_result_of_set_active_pcr_banks() - retrieves the result of a previous
* set_active_pcr_banks()
* efi_tcg2_get_result_of_set_active_pcr_banks() - retrieve result for previous
* set_active_pcr_banks()
*
* @this: TCG2 protocol instance
* @operation_present: non-zero value to indicate a
@ -486,20 +516,20 @@ set_active_pcr_banks(struct efi_tcg2_protocol *this, u32 active_pcr_banks)
* Return: status code
*/
efi_status_t EFIAPI
get_result_of_set_active_pcr_banks(struct efi_tcg2_protocol *this,
u32 *operation_present, u32 *response)
efi_tcg2_get_result_of_set_active_pcr_banks(struct efi_tcg2_protocol *this,
u32 *operation_present, u32 *response)
{
return EFI_UNSUPPORTED;
}
static const struct efi_tcg2_protocol efi_tcg2_protocol = {
.get_capability = get_capability,
.get_eventlog = get_eventlog,
.hash_log_extend_event = hash_log_extend_event,
.submit_command = submit_command,
.get_active_pcr_banks = get_active_pcr_banks,
.set_active_pcr_banks = set_active_pcr_banks,
.get_result_of_set_active_pcr_banks = get_result_of_set_active_pcr_banks,
.get_capability = efi_tcg2_get_capability,
.get_eventlog = efi_tcg2_get_eventlog,
.hash_log_extend_event = efi_tcg2_hash_log_extend_event,
.submit_command = efi_tcg2_submit_command,
.get_active_pcr_banks = efi_tcg2_get_active_pcr_banks,
.set_active_pcr_banks = efi_tcg2_set_active_pcr_banks,
.get_result_of_set_active_pcr_banks = efi_tcg2_get_result_of_set_active_pcr_banks,
};
/**
@ -513,18 +543,12 @@ efi_status_t efi_tcg2_register(void)
{
efi_status_t ret;
struct udevice *dev;
enum tpm_version tpm_ver;
ret = platform_get_tpm2_device(&dev);
if (ret != EFI_SUCCESS)
return EFI_SUCCESS;
tpm_ver = tpm_get_version(dev);
if (tpm_ver != TPM_V2) {
log_warning("Only TPMv2 supported for EFI_TCG2_PROTOCOL\n");
if (ret != EFI_SUCCESS) {
log_warning("Unable to find TPMv2 device\n");
return EFI_SUCCESS;
}
ret = efi_add_protocol(efi_root, &efi_guid_tcg2_protocol,
(void *)&efi_tcg2_protocol);
if (ret != EFI_SUCCESS)

11
lib/efi_loader/efi_var_mem.c
View File

@ -304,8 +304,8 @@ efi_get_variable_mem(u16 *variable_name, const efi_guid_t *vendor, u32 *attribut
}
efi_status_t __efi_runtime
efi_get_next_variable_name_mem(efi_uintn_t *variable_name_size, u16 *variable_name,
efi_guid_t *vendor)
efi_get_next_variable_name_mem(efi_uintn_t *variable_name_size,
u16 *variable_name, efi_guid_t *vendor)
{
struct efi_var_entry *var;
efi_uintn_t old_size;
@ -314,7 +314,12 @@ efi_get_next_variable_name_mem(efi_uintn_t *variable_name_size, u16 *variable_na
if (!variable_name_size || !variable_name || !vendor)
return EFI_INVALID_PARAMETER;
efi_var_mem_find(vendor, variable_name, &var);
if (u16_strnlen(variable_name, *variable_name_size) ==
*variable_name_size)
return EFI_INVALID_PARAMETER;
if (!efi_var_mem_find(vendor, variable_name, &var) && *variable_name)
return EFI_INVALID_PARAMETER;
if (!var)
return EFI_NOT_FOUND;