VbError_t VbExHashFirmwareBody(VbCommonParams *cparams, uint32_t firmware_index)
{
uint8_t *data;
uint32_t size;
uint32_t data_size;
struct components *components;
uint32_t i;
switch (firmware_index) {
case VB_SELECT_FIRMWARE_A:
data = gcontext->fw_a;
size = gcontext->fw_a_size;
break;
case VB_SELECT_FIRMWARE_B:
data = gcontext->fw_b;
size = gcontext->fw_b_size;
break;
default:
return VBERROR_UNKNOWN;
}
components = (void *)data;
data_size = sizeof(struct components);
if (components->num_components > MAX_NUM_COMPONENTS)
return VBERROR_UNKNOWN;
data_size +=
components->num_components * sizeof(struct component_entry);
for (i = 0; i < components->num_components; i++)
data_size += ALIGN(components->entries[i].size, 4);
if (size < data_size)
return VBERROR_UNKNOWN;
VbUpdateFirmwareBodyHash(cparams, data, data_size);
return VBERROR_SUCCESS;
}
VbError_t VbExHashFirmwareBody(VbCommonParams *cparams, uint32_t firmware_index)
{
uint8_t *data;
struct vboot_region *region;
struct vboot_context *ctx;
size_t data_size;
uintptr_t offset_addr;
ctx = cparams->caller_context;
switch (firmware_index) {
case VB_SELECT_FIRMWARE_A:
region = &ctx->fw_a;
break;
case VB_SELECT_FIRMWARE_B:
region = &ctx->fw_b;
break;
default:
return VBERROR_UNKNOWN;
}
data_size = region->size;
offset_addr = region->offset_addr;
while (data_size) {
size_t block_size;
block_size = get_hash_block_size(data_size);
data = ctx->get_region(offset_addr, block_size, NULL);
if (data == NULL)
return VBERROR_UNKNOWN;
VbUpdateFirmwareBodyHash(cparams, data, block_size);
data_size -= block_size;
offset_addr += block_size;
}
return VBERROR_SUCCESS;
}
