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Sighax compatibility improvements

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... this also removes the last remaining NAND offset hardcoding
This commit is contained in:
d0k3 2017-05-31 23:25:34 +02:00
parent c93746e957
commit 5694df0dad
1 changed files with 16 additions and 19 deletions
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33
source/nand/nand.c
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@ -140,7 +140,7 @@ bool InitNandCrypto(void)
// part #2: TWL KEY
// see: https://www.3dbrew.org/wiki/Memory_layout#ARM9_ITCM
if (IS_A9LH) { // only for a9lh
if (IS_A9LH) { // only for a9lh (and sighax, for now)
u32* TwlCustId = (u32*) (0x01FFB808);
u8 TwlKeyX[16] __attribute__((aligned(32)));
u8 TwlKeyY[16] __attribute__((aligned(32)));
@ -167,18 +167,19 @@ bool InitNandCrypto(void)
// part #3: CTRNAND N3DS KEY / AGBSAVE CMAC KEY
// thanks AuroraWright and Gelex for advice on this
// see: https://github.com/AuroraWright/Luma3DS/blob/master/source/crypto.c#L347
if (IS_A9LH && !IS_SIGHAX) { // only on A9LH, not required on sighax
// keyY 0x05 is encrypted @0x0EB014 in the FIRM90
// keyY 0x05 is encrypted @0x0EB24C in the FIRM81
if ((LoadKeyYFromP9(slot0x05KeyY, slot0x05KeyY_sha256, 0x0EB014, 0x05) != 0) &&
(LoadKeyYFromP9(slot0x05KeyY, slot0x05KeyY_sha256, 0x0EB24C, 0x05) != 0))
LoadKeyFromFile(slot0x05KeyY, 0x05, 'Y', NULL);
// keyY 0x05 is encrypted @0x0EB014 in the FIRM90
// keyY 0x05 is encrypted @0x0EB24C in the FIRM81
if ((LoadKeyYFromP9(slot0x05KeyY, slot0x05KeyY_sha256, 0x0EB014, 0x05) != 0) &&
(LoadKeyYFromP9(slot0x05KeyY, slot0x05KeyY_sha256, 0x0EB24C, 0x05) != 0))
LoadKeyFromFile(slot0x05KeyY, 0x05, 'Y', NULL);
// keyY 0x24 is encrypted @0x0E62DC in the FIRM90
// keyY 0x24 is encrypted @0x0E6514 in the FIRM81
if ((LoadKeyYFromP9(NULL, slot0x24KeyY_sha256, 0x0E62DC, 0x24) != 0) &&
(LoadKeyYFromP9(NULL, slot0x24KeyY_sha256, 0x0E6514, 0x24) != 0))
LoadKeyFromFile(NULL, 0x24, 'Y', NULL);
// keyY 0x24 is encrypted @0x0E62DC in the FIRM90
// keyY 0x24 is encrypted @0x0E6514 in the FIRM81
if ((LoadKeyYFromP9(NULL, slot0x24KeyY_sha256, 0x0E62DC, 0x24) != 0) &&
(LoadKeyYFromP9(NULL, slot0x24KeyY_sha256, 0x0E6514, 0x24) != 0))
LoadKeyFromFile(NULL, 0x24, 'Y', NULL);
}
return true;
}
@ -189,12 +190,8 @@ bool CheckSlot0x05Crypto(void)
if (sha_cmp(slot0x05KeyY_sha256, slot0x05KeyY, 16, SHA256_MODE) == 0)
return true;
// step #2 - check actual CTRNAND magic
const u8 magic[8] = {0xE9, 0x00, 0x00, 0x43, 0x54, 0x52, 0x20, 0x20};
const u32 sector = 0x05CAD7;
u8 buffer[0x200];
ReadNandSectors(buffer, sector, 1, 0x05, NAND_SYSNAND);
if (memcmp(buffer, magic, 8) == 0)
// step #2 - check actual presence of CTRNAND FAT
if (GetNandPartitionInfo(NULL, NP_TYPE_STD, NP_SUBTYPE_CTR_N, 0, NAND_SYSNAND) == 0)
return true;
// failed if we arrive here