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Make Backup verifying faster by using SE's SHA256

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This commit is contained in:
Kostas Missos 2018-06-26 19:07:34 +03:00
parent 3f18713f53
commit 37a15ca8ff
2 changed files with 46 additions and 8 deletions
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25
ipl/main.c
View file

@ -688,13 +688,15 @@ void power_off()
i2c_send_byte(I2C_5, 0x3C, MAX77620_REG_ONOFFCNFG1, MAX77620_ONOFFCNFG1_PWR_OFF);
}
//TODO: Make it faster!!
int dump_emmc_verify(sdmmc_storage_t *storage, u32 lba_curr, char* outFilename, emmc_part_t *part)
{
FIL fp;
u32 prevPct = 200;
int res = 0;
u8 hashEm[0x20];
u8 hashSd[0x20];
if (f_open(&fp, outFilename, FA_READ) == FR_OK)
{
u32 totalSectorsVer = (u32)(f_size(&fp) >> 9);
@ -735,11 +737,18 @@ int dump_emmc_verify(sdmmc_storage_t *storage, u32 lba_curr, char* outFilename,
f_close(&fp);
return 1;
}
//TODO: Replace with the config check 2.
if (1)
//TODO: Replace 2 with config variable
switch (2)
{
case 1:
res = memcmp32sparse((u32 *)bufEm, (u32 *)bufSd, num << 9);
else
res = memcmp((u32 *)bufEm, (u32 *)bufSd, num << 9);
break;
case 2:
se_calc_sha256(&hashEm, bufEm, num << 9);
se_calc_sha256(&hashSd, bufSd, num << 9);
res = memcmp(hashEm, hashSd, 0x20);
break;
}
if(res)
{
EPRINTFARGS("\nSD card and eMMC data (@LBA %08X),\ndo not match!\n\nVerification failed..\n", num, lba_curr);
@ -1037,7 +1046,7 @@ int dump_emmc_part(char *sd_path, sdmmc_storage_t *storage, emmc_part_t *part)
f_close(&fp);
//TODO: Replace with the config check.
if (0)
if (1)
{
// Verify last part or single file backup.
if (dump_emmc_verify(storage, lbaStartPart, outFilename, part))
@ -1176,7 +1185,7 @@ static void dump_emmc_selected(dumpType_t dumpType)
gfx_putc(&gfx_con, '\n');
gfx_printf(&gfx_con, "Time taken: %d seconds.\n", get_tmr_s() - timer);
sdmmc_storage_end(&storage);
if (res && 0) //TODO: Replace with the config check.
if (res && 1) //TODO: Replace with the config check.
gfx_printf(&gfx_con, "\n%kFinished and verified!%k\nPress any key...\n",0xFF96FF00, 0xFFCCCCCC);
else if (res)
gfx_printf(&gfx_con, "\nFinished! Press any key...\n");
@ -1694,7 +1703,7 @@ ment_t ment_tools[] = {
MDEF_CAPTION("------ Misc -------", 0xFF0AB9E6),
MDEF_HANDLER("Dump package1", dump_package1),
MDEF_HANDLER("Fix SD files attributes", fix_sd_attr),
MDEF_HANDLER("Fix battery de-sync", &fix_battery_desync),
MDEF_HANDLER("Fix battery de-sync", fix_battery_desync),
//MDEF_MENU("Fix fuel gauge configuration", &fix_fuel_gauge_configuration),
MDEF_CHGLINE(),
MDEF_CAPTION("---- Dangerous ----", 0xFFFF0000),

29
ipl/se.c
View file

@ -1,5 +1,7 @@
/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2018 CTCaer
* Copyright (c) 2018 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@ -19,6 +21,7 @@
#include "heap.h"
#include "t210.h"
#include "se_t210.h"
#include "util.h"
typedef struct _se_ll_t
{
@ -254,3 +257,29 @@ int se_aes_xts_crypt(u32 ks1, u32 ks2, u32 enc, u64 sec, void *dst, void *src, u
return 1;
}
// se_calc_sha256() was derived from Atmosphère's se_calculate_sha256.
int se_calc_sha256(void *dst, const void *src, u32 src_size) {
int res;
// Setup config for SHA256, size = BITS(src_size).
SE(SE_CONFIG_REG_OFFSET) = SE_CONFIG_ENC_MODE(MODE_SHA256) | SE_CONFIG_ENC_ALG(ALG_SHA) | SE_CONFIG_DST(DST_HASHREG);
SE(SE_SHA_CONFIG_REG_OFFSET) = 1;
SE(SE_SHA_MSG_LENGTH_REG_OFFSET) = (u32)(src_size << 3);
SE(0x208) = 0;
SE(0x20C) = 0;
SE(0x210) = 0;
SE(SE_SHA_MSG_LEFT_REG_OFFSET) = (u32)(src_size << 3);
SE(0x218) = 0;
SE(0x21C) = 0;
SE(0x220) = 0;
// Trigger the operation.
res = _se_execute(OP_START, NULL, 0, src, src_size);
// Copy output hash.
u32 *dst32 = (u32 *)dst;
for (u32 i = 0; i < 8; i++)
dst32[i] = byte_swap_32(SE(SE_HASH_RESULT_REG_OFFSET + (i << 2)));
return res;
}