u32 DumpNand(u32 param)
{
char filename[64];
u8* buffer = BUFFER_ADDRESS;
u32 nand_size = getMMCDevice(0)->total_size * NAND_SECTOR_SIZE;
u32 result = 0;
Debug("Dumping %sNAND. Size (MB): %u", (param & N_EMUNAND) ? "Emu" : "Sys", nand_size / (1024 * 1024));
if (OutputFileNameSelector(filename, "NAND.bin", NULL, param & N_EMUNAND) != 0)
return 1;
if (!DebugFileCreate(filename, true))
return 1;
u32 n_sectors = nand_size / NAND_SECTOR_SIZE;
for (u32 i = 0; i < n_sectors; i += SECTORS_PER_READ) {
u32 read_sectors = min(SECTORS_PER_READ, (n_sectors - i));
ShowProgress(i, n_sectors);
ReadNandSectors(i, read_sectors, buffer);
if(!DebugFileWrite(buffer, NAND_SECTOR_SIZE * read_sectors, i * NAND_SECTOR_SIZE)) {
result = 1;
break;
}
}
ShowProgress(0, 0);
FileClose();
return result;
}
u32 CtrNandPadgen(u32 param)
{
u32 keyslot;
u32 nand_size;
// legacy sizes & offset, to work with 3DSFAT16Tool
if (GetUnitPlatform() == PLATFORM_3DS) {
keyslot = 0x4;
nand_size = 758;
} else {
keyslot = 0x5;
nand_size = 1055;
}
Debug("Creating NAND FAT16 xorpad. Size (MB): %u", nand_size);
Debug("Filename: nand.fat16.xorpad");
PadInfo padInfo = {
.keyslot = keyslot,
.setKeyY = 0,
.size_mb = nand_size,
.filename = "nand.fat16.xorpad",
.mode = AES_CNT_CTRNAND_MODE
};
if(GetNandCtr(padInfo.ctr, 0xB930000) != 0)
return 1;
return CreatePad(&padInfo);
}
u32 TwlNandPadgen(u32 param)
{
u32 size_mb = (partitions[0].size + (1024 * 1024) - 1) / (1024 * 1024);
Debug("Creating TWLN FAT16 xorpad. Size (MB): %u", size_mb);
Debug("Filename: twlnand.fat16.xorpad");
PadInfo padInfo = {
.keyslot = partitions[0].keyslot,
.setKeyY = 0,
.size_mb = size_mb,
.filename = "twlnand.fat16.xorpad",
.mode = AES_CNT_TWLNAND_MODE
};
if(GetNandCtr(padInfo.ctr, partitions[0].offset) != 0)
return 1;
return CreatePad(&padInfo);
}
u32 Firm0Firm1Padgen(u32 param)
{
u32 size_mb = (partitions[3].size + partitions[4].size + (1024 * 1024) - 1) / (1024 * 1024);
Debug("Creating FIRM0FIRM1 xorpad. Size (MB): %u", size_mb);
Debug("Filename: firm0firm1.xorpad");
PadInfo padInfo = {
.keyslot = partitions[3].keyslot,
.setKeyY = 0,
.size_mb = size_mb,
.filename = "firm0firm1.xorpad",
.mode = AES_CNT_CTRNAND_MODE
};
if(GetNandCtr(padInfo.ctr, partitions[3].offset) != 0)
return 1;
return CreatePad(&padInfo);
}
u32 GetNandCtr(u8* ctr, u32 offset)
{
static const char* versions[] = {"4.x", "5.x", "6.x", "7.x", "8.x", "9.x"};
static const u8* version_ctrs[] = {
(u8*)0x080D7CAC,
(u8*)0x080D858C,
(u8*)0x080D748C,
(u8*)0x080D740C,
(u8*)0x080D74CC,
(u8*)0x080D794C
};
static const u32 version_ctrs_len = sizeof(version_ctrs) / sizeof(u32);
static u8* ctr_start = NULL;
if (ctr_start == NULL) {
for (u32 i = 0; i < version_ctrs_len; i++) {
if (*(u32*)version_ctrs[i] == 0x5C980) {
Debug("System version %s", versions[i]);
ctr_start = (u8*) version_ctrs[i] + 0x30;
}
}
// If value not in previous list start memory scanning (test range)
if (ctr_start == NULL) {
for (u8* c = (u8*) 0x080D8FFF; c > (u8*) 0x08000000; c--) {
if (*(u32*)c == 0x5C980 && *(u32*)(c + 1) == 0x800005C9) {
ctr_start = c + 0x30;
Debug("CTR start 0x%08X", ctr_start);
break;
}
}
}
if (ctr_start == NULL) {
Debug("CTR start not found!");
return 1;
}
}
// the ctr is stored backwards in memory
if (offset >= 0x0B100000) { // CTRNAND/AGBSAVE region
for (u32 i = 0; i < 16; i++)
ctr[i] = *(ctr_start + (0xF - i));
} else { // TWL region
for (u32 i = 0; i < 16; i++)
ctr[i] = *(ctr_start + 0x88 + (0xF - i));
}
// increment counter
add_ctr(ctr, offset / 0x10);
return 0;
}
u32 DecryptNandToMem(u8* buffer, u32 offset, u32 size, PartitionInfo* partition)
{
CryptBufferInfo info = {.keyslot = partition->keyslot, .setKeyY = 0, .size = size, .buffer = buffer, .mode = partition->mode};
if(GetNandCtr(info.ctr, offset) != 0)
return 1;
u32 n_sectors = (size + NAND_SECTOR_SIZE - 1) / NAND_SECTOR_SIZE;
u32 start_sector = offset / NAND_SECTOR_SIZE;
ReadNandSectors(start_sector, n_sectors, buffer);
CryptBuffer(&info);
return 0;
}
u32 DecryptNandToFile(const char* filename, u32 offset, u32 size, PartitionInfo* partition)
{
u8* buffer = BUFFER_ADDRESS;
u32 result = 0;
if (!DebugFileCreate(filename, true))
return 1;
for (u32 i = 0; i < size; i += NAND_SECTOR_SIZE * SECTORS_PER_READ) {
u32 read_bytes = min(NAND_SECTOR_SIZE * SECTORS_PER_READ, (size - i));
ShowProgress(i, size);
DecryptNandToMem(buffer, offset + i, read_bytes, partition);
if(!DebugFileWrite(buffer, read_bytes, i)) {
result = 1;
break;
}
}
ShowProgress(0, 0);
FileClose();
return result;
}
