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Refactor AutoRCM tools

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This commit is contained in:
CTCaer
2020-12-26 16:38:21 +02:00
parent 2628044ba8
commit a85891ae00
8 changed files with 92 additions and 59 deletions
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43
bootloader/frontend/fe_tools.c
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@@ -270,8 +270,6 @@ void _toggle_autorcm(bool enable)
sdmmc_storage_t storage;
sdmmc_t sdmmc;
u8 randomXor = 0;
gfx_clear_partial_grey(0x1B, 0, 1256);
gfx_con_setpos(0, 0);
@@ -285,28 +283,25 @@ void _toggle_autorcm(bool enable)
sdmmc_storage_set_mmc_partition(&storage, EMMC_BOOT0);
int i, sect = 0;
u8 corr_mod_byte0;
if ((fuse_read_odm(4) & 3) != 3)
corr_mod_byte0 = 0xF7;
else
corr_mod_byte0 = 0x37;
u8 corr_mod0, mod1;
// Get the correct RSA modulus byte masks.
nx_emmc_get_autorcm_masks(&corr_mod0, &mod1);
// Iterate BCTs.
for (i = 0; i < 4; i++)
{
sect = (0x200 + (0x4000 * i)) / NX_EMMC_BLOCKSIZE;
sdmmc_storage_read(&storage, sect, 1, tempbuf);
if (enable)
{
do
{
randomXor = get_tmr_us() & 0xFF; // Bricmii style of bricking.
} while (!randomXor); // Avoid the lottery.
// Check if 2nd byte of modulus is correct.
if (tempbuf[0x11] != mod1)
continue;
tempbuf[0x10] ^= randomXor;
}
if (enable)
tempbuf[0x10] = 0;
else
tempbuf[0x10] = corr_mod_byte0;
tempbuf[0x10] = corr_mod0;
sdmmc_storage_write(&storage, sect, 1, tempbuf);
}
@@ -354,20 +349,18 @@ void menu_autorcm()
return;
}
u8 mod0, mod1;
// Get the correct RSA modulus byte masks.
nx_emmc_get_autorcm_masks(&mod0, &mod1);
u8 *tempbuf = (u8 *)malloc(0x200);
sdmmc_storage_set_mmc_partition(&storage, EMMC_BOOT0);
sdmmc_storage_read(&storage, 0x200 / NX_EMMC_BLOCKSIZE, 1, tempbuf);
if ((fuse_read_odm(4) & 3) != 3)
{
if (tempbuf[0x10] != 0xF7)
// Check if 2nd byte of modulus is correct.
if (tempbuf[0x11] == mod1)
if (tempbuf[0x10] != mod0)
disabled = false;
}
else
{
if (tempbuf[0x10] != 0x37)
disabled = false;
}
free(tempbuf);
sdmmc_storage_end(&storage);