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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2021 Alibaba Group Holding Limited
*/
#include "sbmeta.h"
#define NO_DEBUG 0
#if NO_DEBUG
#define print_info(fmt, args...)
#else
#define print_info(fmt, args...) printf(fmt, ##args)
#endif
#if CONFIG_IS_ENABLED(LIGHT_SEC_BOOT_WITH_VERIFY_VAL_A) || CONFIG_IS_ENABLED(LIGHT_SEC_BOOT_WITH_VERIFY_VAL_B) || CONFIG_IS_ENABLED(LIGHT_SEC_BOOT_WITH_VERIFY_LPI4A)
#if CONFIG_IS_ENABLED(LIGHT_SEC_UPGRADE)
/* digest_size corresponding to digest_scheme specified in sbmeta_info_t */
static const int digest_size[] = {0, 20, 16, 28, 32, 48, 64, 32, 64};
static const char* image_name_s[] = {
"dtb", "kernel", "tf", "aon", "rootfs", "tee", "uboot", "user"
};
static const uint32_t image_addrs[] = {
LIGHT_DTB_ADDR,
LIGHT_KERNEL_ADDR,
LIGHT_TF_FW_TMP_ADDR,
LIGHT_AON_FW_ADDR,
LIGHT_ROOTFS_ADDR,
LIGHT_TEE_FW_ADDR,
CONFIG_SYS_TEXT_BASE,
};
static int is_sbmeta_info(uint32_t entry_src_addr)
{
uint32_t *buffer = (uint32_t *)entry_src_addr;
/* sbmeta_info_t entry should start with magic code 'S''B''M''T' */
if (*buffer != SBMETA_MAGIC) {
return -1;
}
return 0;
}
static int dump_sbmeta_info(sbmeta_info_t *sbmeta_info)
{
if (sbmeta_info == NULL) {
return CMD_RET_FAILURE;
}
/* only support emmc now */
if (sbmeta_info->medium_type != 0) {
print_info("Error: medium type %s is not supported now\r\n");
return CMD_RET_FAILURE;
}
/* only support dtb, krlimg/tf, sbi, aon, rootfs, tee, uboot and user-defined type */
if (sbmeta_info->image_type > IMAGE_TYPE_NUM || sbmeta_info->image_type < 0) {
print_info("Error: image type is out of range\r\n");
return CMD_RET_FAILURE;
}
/* only support none, sha1, md5, sha224, sha256, sha384, sha512, sm3 and reserved scheme */
if (sbmeta_info->digest_scheme > DIGEST_TYPE_NUM || sbmeta_info->digest_scheme < 0) {
print_info("Error: digest type is out of range\r\n");
return CMD_RET_FAILURE;
}
/* only support none, rsa1024, rsa2048, ecc256, ecc160, sm2 and reserved scheme */
if (sbmeta_info->sign_scheme > SIGN_TYPE_NUM || sbmeta_info->sign_scheme < 0) {
print_info("Error: signature type is out of range\r\n");
return CMD_RET_FAILURE;
}
/* DTB, TF, TEE, Kernel will be loaded from default partitions specified in env */
if (sbmeta_info->image_type != T_ROOTFS && sbmeta_info->image_type != T_USER) {
print_info("Image has been loaded\r\n");
}
/* dump sbmeta_info_t */
print_info("image medium type: %d\n", sbmeta_info->medium_type);
print_info("image load part: mmc %d:%d\n", sbmeta_info->dev, sbmeta_info->part);
print_info("image type: %d \n", sbmeta_info->image_type);
print_info("image digest scheme: %d\n", sbmeta_info->digest_scheme);
print_info("image sign scheme: %d\n", sbmeta_info->sign_scheme);
print_info("image enable encryption: %s\n", sbmeta_info->isencrypted ? "en" : "dis");
print_info("image file name: %s\n", sbmeta_info->filename);
print_info("image digest:");
for (int i = 0; i < digest_size[sbmeta_info->digest_scheme]; i++) {
print_info("%02X", sbmeta_info->digest[i]);
}
print_info("\r\n");
return 0;
}
/* Verify image specified in sbmeta_info_t. The image has been loaded to memory before */
static int sbmeta_verify_image(uint32_t image_load_addr, uint8_t image_type)
{
uint32_t image_size = 0;
char *image_name = NULL;
/* check image_type to avoid array index out of bounds */
if (image_type > IMAGE_TYPE_NUM || image_type < 0) {
print_info("Error: image type is out of range\r\n");
return CMD_RET_FAILURE;
}
image_name = image_name_s[image_type];
/* if image has secure header, do verification. otherwise */
if (image_have_head(image_load_addr) == 1) {
/* check tee/tf version if needed */
#ifdef LIGHT_IMG_VERSION_CHECK_IN_BOOT
if (image_type == T_TF) {
print_info("check TF version in boot \n");
if (check_tf_version_in_boot(LIGHT_TF_FW_TMP_ADDR) != 0) {
return CMD_RET_FAILURE;
}
}
if (image_type == T_TEE) {
print_info("check TEE version in boot \n");
if (check_tee_version_in_boot(LIGHT_TEE_FW_ADDR) != 0) {
return CMD_RET_FAILURE;
}
}
#endif
/* start verifying images */
print_info("Process %s image verification ...\n", image_name);
dump_image_header_info(image_load_addr);
if (image_type == T_UBOOT) {
if (csi_sec_uboot_image_verify(image_load_addr, image_load_addr - PUBKEY_HEADER_SIZE) != 0) {
print_info("Image(%s) is verified fail, Please go to check!\n\n", image_name);
return CMD_RET_FAILURE;
}
} else {
if (csi_sec_custom_image_verify(image_load_addr, UBOOT_STAGE_ADDR) != 0) {
print_info("Image(%s) is verified fail, Please go to check!\n\n", image_name);
return CMD_RET_FAILURE;
}
}
image_size = get_image_size(image_load_addr);
print_info("%s image size: %d\n", image_name, image_size);
if (image_size < 0) {
print_info("GET %s image size error\n", image_name);
return CMD_RET_FAILURE;
}
/* move image headers always */
if (image_type == T_TF) {
memmove((void *)LIGHT_TF_FW_ADDR, (const void *)(image_load_addr + HEADER_SIZE), image_size);
} else {
memmove((void *)image_load_addr, (const void *)(image_load_addr + HEADER_SIZE), image_size);
}
} else {
/* TF should be moved to LIGHT_TF_FW_ADDR all the cases*/
if (image_type == T_TF) {
/* while image_size is unknown, reload the image */
run_command("ext4load mmc 0:3 0x0 trust_firmware.bin", 0);
}
}
return 0;
}
static int light_sbmetaboot(int argc, char *const argv[])
{
int count = 0;
uint32_t sbmeta_size = 0;
uint32_t info_addr = 0;
uint32_t image_load_addr = 0;
char cmd[64] = {0};
char *image_name = NULL;
sbmeta_info_t *sbmeta_info = NULL;
/* Load sbmeta image to memory */
snprintf(cmd, sizeof(cmd), "ext4load mmc %x:%x 0x%p %s", SBMETA_DEV, SBMETA_PART, LIGHT_SBMETA_ADDR, SBMETA_FILENAME);
if (run_command(cmd, 0) != 0) {
/* if sbmeta doesn't exist, do secboot by default */
print_info("SBMETA doesn't exist, go to verify tf/tee\r\n");
/*
* Verify tf and tee by command secboot.
* Note that tf and tee has been loaded in "run bootcmd_load"
*/
if (run_command("secboot", 0) != 0) {
return CMD_RET_FAILURE;
}
return 0;
}
/* initialize crypto algorithm interfaces */
if (csi_sec_init() != 0) {
return CMD_RET_FAILURE;
}
/* Check and verify sbmeta image */
if (image_have_head(LIGHT_SBMETA_ADDR) == 1) {
print_info("Process SBMETA image verification...\r\n");
dump_image_header_info(LIGHT_SBMETA_ADDR);
if (csi_sec_custom_image_verify(LIGHT_SBMETA_ADDR, UBOOT_STAGE_ADDR) != 0) {
print_info("SBMETA is verified fail, Please go to check!\r\n");
return CMD_RET_FAILURE;
}
sbmeta_size = get_image_size(LIGHT_SBMETA_ADDR);
print_info("sbmeta_size:%d\r\n", sbmeta_size);
if (sbmeta_size != SBMETA_SIZE) {
print_info("Error: SBMETA header is wrong! Size must equal to %d bytes!\r\n", SBMETA_SIZE);
return CMD_RET_FAILURE;
}
/* move image headers always */
memmove((void *)LIGHT_SBMETA_ADDR, (const void *)(LIGHT_SBMETA_ADDR + HEADER_SIZE), sbmeta_size);
} else {
/* if sbmeta image is not secure, reset */
print_info("Error: SBMETA image must be with signature\r\n");
return CMD_RET_FAILURE;
}
/* Parse sbmeta_info_t in image sbmeta, then load and verify specified images */
info_addr = LIGHT_SBMETA_ADDR;
for (count = 0; count < MAX_ENTRY_NUM; count++) {
if (is_sbmeta_info(info_addr) == 0) {
/* Dump and check sbmeta info */
sbmeta_info = (sbmeta_info_t*)info_addr;
if (dump_sbmeta_info(sbmeta_info) != 0) {
return CMD_RET_FAILURE;
}
image_name = image_name_s[sbmeta_info->image_type];
info_addr += ENTRY_SIZE;
/*
* If image_type != T_USER, load to address specified in light-c910.h;
* otherwise, load to user-specified address.
*/
if (sbmeta_info->image_type != T_USER) {
image_load_addr = image_addrs[sbmeta_info->image_type];
} else {
image_load_addr = sbmeta_info->relocated_addr;
}
/*
* Load image specified in sbmeta info
* Note: only load images don't exist in env "bootcmd_load"
*/
if (sbmeta_info->image_type == T_ROOTFS || sbmeta_info->image_type == T_USER) {
snprintf(cmd, sizeof(cmd), "ext4load mmc %x:%x %p %s", sbmeta_info->dev,
sbmeta_info->part, \
image_load_addr, sbmeta_info->filename);
if (run_command(cmd, 0) != 0) {
return CMD_RET_FAILURE;
}
}
/* Check and verify user-specified image */
if (sbmeta_verify_image(image_load_addr, sbmeta_info->image_type) != 0) {
return CMD_RET_FAILURE;
}
} else {
break;
}
}
/* if sbmeta didn't specify images, reset */
if (count == 0) {
print_info("Error: SBMETA doesn't specify any images!\r\n");
return CMD_RET_FAILURE;
}
/* Clear sbmeta buffer in memory */
memset((void *)LIGHT_SBMETA_ADDR, 0, PLAIN_SBMETA_TEXT);
return 0;
}
static int do_sbmetaboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
if (light_sbmetaboot(argc, argv) != 0) {
run_command("reset", 0);
return -1;
}
return 0;
}
U_BOOT_CMD(
sbmetaboot, CONFIG_SYS_MAXARGS, 1, do_sbmetaboot,
"load and verify image sbmeta, then verify image files specified in sbmeta",
""
);
#endif
#endif
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