mirror of
https://github.com/AsahiLinux/u-boot
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80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022, Ramin <raminterex@yahoo.com>
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* Copyright (c) 2022, Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <log.h>
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#include <asm/arch-tegra/crypto.h>
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#include "bct.h"
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#include "uboot_aes.h"
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/*
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* @param bct boot config table start in RAM
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* @param ect bootloader start in RAM
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* @param ebt_size bootloader file size in bytes
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* Return: 0, or 1 if failed
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*/
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static int bct_patch(u8 *bct, u8 *ebt, u32 ebt_size)
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{
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struct nvboot_config_table *bct_tbl = NULL;
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u8 ebt_hash[AES128_KEY_LENGTH] = { 0 };
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u8 sbk[AES128_KEY_LENGTH] = { 0 };
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u8 *bct_hash = bct;
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int ret;
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bct += BCT_HASH;
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memcpy(sbk, (u8 *)(bct + BCT_LENGTH),
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NVBOOT_CMAC_AES_HASH_LENGTH * 4);
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ret = decrypt_data_block(bct, BCT_LENGTH, sbk);
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if (ret)
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return 1;
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ebt_size = roundup(ebt_size, EBT_ALIGNMENT);
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ret = encrypt_data_block(ebt, ebt_size, sbk);
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if (ret)
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return 1;
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ret = sign_enc_data_block(ebt, ebt_size, ebt_hash, sbk);
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if (ret)
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return 1;
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bct_tbl = (struct nvboot_config_table *)bct;
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memcpy((u8 *)&bct_tbl->bootloader[0].crypto_hash,
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ebt_hash, NVBOOT_CMAC_AES_HASH_LENGTH * 4);
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bct_tbl->bootloader[0].entry_point = CONFIG_SPL_TEXT_BASE;
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bct_tbl->bootloader[0].load_addr = CONFIG_SPL_TEXT_BASE;
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bct_tbl->bootloader[0].length = ebt_size;
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ret = encrypt_data_block(bct, BCT_LENGTH, sbk);
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if (ret)
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return 1;
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ret = sign_enc_data_block(bct, BCT_LENGTH, bct_hash, sbk);
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if (ret)
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return 1;
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return 0;
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}
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static int do_ebtupdate(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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u32 bct_addr = hextoul(argv[1], NULL);
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u32 ebt_addr = hextoul(argv[2], NULL);
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u32 ebt_size = hextoul(argv[3], NULL);
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return bct_patch((u8 *)bct_addr, (u8 *)ebt_addr, ebt_size);
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}
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U_BOOT_CMD(ebtupdate, 4, 0, do_ebtupdate,
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"update bootloader on re-crypted Tegra20 devices",
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""
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);
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