diff options
Diffstat (limited to 'arch/arm/mach-tegra/tegra30/bct.c')
-rw-r--r-- | arch/arm/mach-tegra/tegra30/bct.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra30/bct.c b/arch/arm/mach-tegra/tegra30/bct.c new file mode 100644 index 0000000000..c56958da69 --- /dev/null +++ b/arch/arm/mach-tegra/tegra30/bct.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2022, Ramin <raminterex@yahoo.com> + * Copyright (c) 2022, Svyatoslav Ryhel <clamor95@gmail.com> + */ + +#include <common.h> +#include <command.h> +#include <log.h> +#include <asm/arch-tegra/crypto.h> +#include "bct.h" +#include "uboot_aes.h" + +/* + * @param bct boot config table start in RAM + * @param ect bootloader start in RAM + * @param ebt_size bootloader file size in bytes + * Return: 0, or 1 if failed + */ +static int bct_patch(u8 *bct, u8 *ebt, u32 ebt_size) +{ + struct nvboot_config_table *bct_tbl = NULL; + u8 ebt_hash[AES128_KEY_LENGTH] = { 0 }; + u8 sbk[AES128_KEY_LENGTH] = { 0 }; + u8 *bct_hash = bct; + int ret; + + bct += BCT_HASH; + + memcpy(sbk, (u8 *)(bct + BCT_LENGTH), + NVBOOT_CMAC_AES_HASH_LENGTH * 4); + + ret = decrypt_data_block(bct, BCT_LENGTH, sbk); + if (ret) + return 1; + + ebt_size = roundup(ebt_size, EBT_ALIGNMENT); + + ret = encrypt_data_block(ebt, ebt_size, sbk); + if (ret) + return 1; + + ret = sign_enc_data_block(ebt, ebt_size, ebt_hash, sbk); + if (ret) + return 1; + + bct_tbl = (struct nvboot_config_table *)bct; + + memcpy((u8 *)&bct_tbl->bootloader[0].crypto_hash, + ebt_hash, NVBOOT_CMAC_AES_HASH_LENGTH * 4); + bct_tbl->bootloader[0].entry_point = CONFIG_SPL_TEXT_BASE; + bct_tbl->bootloader[0].load_addr = CONFIG_SPL_TEXT_BASE; + bct_tbl->bootloader[0].length = ebt_size; + + ret = encrypt_data_block(bct, BCT_LENGTH, sbk); + if (ret) + return 1; + + ret = sign_enc_data_block(bct, BCT_LENGTH, bct_hash, sbk); + if (ret) + return 1; + + return 0; +} + +static int do_ebtupdate(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + u32 bct_addr = hextoul(argv[1], NULL); + u32 ebt_addr = hextoul(argv[2], NULL); + u32 ebt_size = hextoul(argv[3], NULL); + + return bct_patch((u8 *)bct_addr, (u8 *)ebt_addr, ebt_size); +} + +U_BOOT_CMD(ebtupdate, 4, 0, do_ebtupdate, + "update bootloader on re-crypted Tegra30 devices", + "" +); |