mirror of
https://github.com/melonDS-emu/melonDS.git
synced 2025-07-24 14:49:53 -06:00
Refactor DSi_NAND (#1844)
* Refactor diskio's contents - Change ff_disk_read_cb/write_cb into a std::function instead of a raw pointer - Add const specifiers as needed * Refactor DSi_NAND to manage the file system's mounted lifetime with RAII * Split NANDMount into NANDMount and NANDImage - NANDImage is used for information about the NAND that doesn't require decryption or filesystem access - NANDMount is used to actually access the file system - Both classes manage their respective resources (the NAND file handle and the NAND's mount) with RAII - Also split the file loading into another function that I will remove in a later PR * Make NANDMount immovable * Remove NAND-loading code that I had sectioned off into a function - Incomplete copypasta - I must have gotten distracted * Tidy up NANDImage's initialization - Don't unmount the disk image if the constructor fails (that's NANDMount's job now) - Only assign CurFile if the constructor succeeds * Add some const-correctness * Move DSi NAND initialization to the frontend - The NANDImage is now installed via a unique_ptr in DSi * Remove Platform::DSi_NANDPath - Not Config::DSiNANDPath; that can still be configured as usual - The core no longer needs to care
This commit is contained in:
Jesse Talavera-Greenberg
committed by
GitHub
GitHub
parent
b2fcff97c1
commit
d4e51f8060
238
src/DSi_NAND.cpp
238
src/DSi_NAND.cpp
@ -22,6 +22,7 @@
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#include "DSi.h"
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#include "DSi_AES.h"
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#include "DSi_NAND.h"
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#include "FATIO.h"
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#include "Platform.h"
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#include "sha1/sha1.hpp"
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@ -34,78 +35,16 @@ using namespace Platform;
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namespace DSi_NAND
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{
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FileHandle* CurFile;
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FATFS CurFS;
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u8 eMMC_CID[16];
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u64 ConsoleID;
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u8 FATIV[16];
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u8 FATKey[16];
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u8 ESKey[16];
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UINT FF_ReadNAND(BYTE* buf, LBA_t sector, UINT num);
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UINT FF_WriteNAND(BYTE* buf, LBA_t sector, UINT num);
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bool Init(u8* es_keyY)
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NANDImage::NANDImage(Platform::FileHandle* nandfile, const DSiKey& es_keyY) noexcept : NANDImage(nandfile, es_keyY.data())
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{
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CurFile = nullptr;
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std::string nandpath = Platform::GetConfigString(Platform::DSi_NANDPath);
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std::string instnand = nandpath + Platform::InstanceFileSuffix();
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FileHandle* nandfile = Platform::OpenLocalFile(instnand, FileMode::ReadWriteExisting);
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if ((!nandfile) && (Platform::InstanceID() > 0))
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{
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FileHandle* orig = Platform::OpenLocalFile(nandpath, FileMode::Read);
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if (!orig)
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{
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Log(LogLevel::Error, "Failed to open DSi NAND\n");
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return false;
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}
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long len = FileLength(orig);
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nandfile = Platform::OpenLocalFile(instnand, FileMode::ReadWrite);
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if (nandfile)
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{
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u8* tmpbuf = new u8[0x10000];
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for (long i = 0; i < len; i+=0x10000)
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{
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long blklen = 0x10000;
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if ((i+blklen) > len) blklen = len-i;
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FileRead(tmpbuf, blklen, 1, orig);
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FileWrite(tmpbuf, blklen, 1, nandfile);
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}
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delete[] tmpbuf;
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}
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Platform::CloseFile(orig);
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Platform::CloseFile(nandfile);
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nandfile = Platform::OpenLocalFile(instnand, FileMode::ReadWriteExisting);
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}
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}
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NANDImage::NANDImage(Platform::FileHandle* nandfile, const u8* es_keyY) noexcept
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{
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if (!nandfile)
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return false;
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return;
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u64 nandlen = FileLength(nandfile);
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ff_disk_open(FF_ReadNAND, FF_WriteNAND, (LBA_t)(nandlen>>9));
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FRESULT res;
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res = f_mount(&CurFS, "0:", 0);
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if (res != FR_OK)
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{
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Log(LogLevel::Error, "NAND mounting failed: %d\n", res);
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f_unmount("0:");
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ff_disk_close();
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return false;
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}
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Length = FileLength(nandfile);
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// read the nocash footer
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@ -113,26 +52,24 @@ bool Init(u8* es_keyY)
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char nand_footer[16];
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const char* nand_footer_ref = "DSi eMMC CID/CPU";
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FileRead(nand_footer, 1, 16, nandfile);
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if (memcmp(nand_footer, nand_footer_ref, 16))
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FileRead(nand_footer, 1, sizeof(nand_footer), nandfile);
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if (memcmp(nand_footer, nand_footer_ref, sizeof(nand_footer)))
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{
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// There is another copy of the footer at 000FF800h for the case
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// that by external tools the image was cut off
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// See https://problemkaputt.de/gbatek.htm#dsisdmmcimages
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FileSeek(nandfile, 0x000FF800, FileSeekOrigin::Start);
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FileRead(nand_footer, 1, 16, nandfile);
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if (memcmp(nand_footer, nand_footer_ref, 16))
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FileRead(nand_footer, 1, sizeof(nand_footer), nandfile);
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if (memcmp(nand_footer, nand_footer_ref, sizeof(nand_footer)))
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{
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Log(LogLevel::Error, "ERROR: NAND missing nocash footer\n");
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CloseFile(nandfile);
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f_unmount("0:");
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ff_disk_close();
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return false;
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return;
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}
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}
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FileRead(eMMC_CID, 1, 16, nandfile);
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FileRead(&ConsoleID, 1, 8, nandfile);
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FileRead(eMMC_CID.data(), 1, sizeof(eMMC_CID), nandfile);
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FileRead(&ConsoleID, 1, sizeof(ConsoleID), nandfile);
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// init NAND crypto
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@ -141,10 +78,10 @@ bool Init(u8* es_keyY)
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u8 keyX[16], keyY[16];
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SHA1Init(&sha);
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SHA1Update(&sha, eMMC_CID, 16);
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SHA1Update(&sha, eMMC_CID.data(), sizeof(eMMC_CID));
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SHA1Final(tmp, &sha);
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Bswap128(FATIV, tmp);
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Bswap128(FATIV.data(), tmp);
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*(u32*)&keyX[0] = (u32)ConsoleID;
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*(u32*)&keyX[4] = (u32)ConsoleID ^ 0x24EE6906;
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@ -157,7 +94,7 @@ bool Init(u8* es_keyY)
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*(u32*)&keyY[12] = 0xE1A00005;
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DSi_AES::DeriveNormalKey(keyX, keyY, tmp);
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Bswap128(FATKey, tmp);
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Bswap128(FATKey.data(), tmp);
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*(u32*)&keyX[0] = 0x4E00004A;
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@ -165,42 +102,87 @@ bool Init(u8* es_keyY)
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*(u32*)&keyX[8] = (u32)(ConsoleID >> 32) ^ 0xC80C4B72;
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*(u32*)&keyX[12] = (u32)ConsoleID;
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memcpy(keyY, es_keyY, 16);
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memcpy(keyY, es_keyY, sizeof(keyY));
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DSi_AES::DeriveNormalKey(keyX, keyY, tmp);
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Bswap128(ESKey, tmp);
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Bswap128(ESKey.data(), tmp);
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CurFile = nandfile;
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return true;
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}
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void DeInit()
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NANDImage::~NANDImage()
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{
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f_unmount("0:");
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ff_disk_close();
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if (CurFile) CloseFile(CurFile);
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CurFile = nullptr;
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}
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FileHandle* GetFile()
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NANDImage::NANDImage(NANDImage&& other) noexcept :
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CurFile(other.CurFile),
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eMMC_CID(other.eMMC_CID),
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ConsoleID(other.ConsoleID),
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FATIV(other.FATIV),
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FATKey(other.FATKey),
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ESKey(other.ESKey)
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{
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return CurFile;
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other.CurFile = nullptr;
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}
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NANDImage& NANDImage::operator=(NANDImage&& other) noexcept
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{
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if (this != &other)
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{
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CurFile = other.CurFile;
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eMMC_CID = other.eMMC_CID;
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ConsoleID = other.ConsoleID;
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FATIV = other.FATIV;
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FATKey = other.FATKey;
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ESKey = other.ESKey;
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other.CurFile = nullptr;
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}
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return *this;
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}
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NANDMount::NANDMount(NANDImage& nand) noexcept : Image(&nand)
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{
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if (!nand)
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return;
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CurFS = std::make_unique<FATFS>();
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ff_disk_open(
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[this](BYTE* buf, LBA_t sector, UINT num) {
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return this->FF_ReadNAND(buf, sector, num);
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},
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[this](const BYTE* buf, LBA_t sector, UINT num) {
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return this->FF_WriteNAND(buf, sector, num);
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},
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(LBA_t)(nand.GetLength()>>9)
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);
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FRESULT res;
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res = f_mount(CurFS.get(), "0:", 0);
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if (res != FR_OK)
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{
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Log(LogLevel::Error, "NAND mounting failed: %d\n", res);
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f_unmount("0:");
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ff_disk_close();
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return;
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}
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}
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void GetIDs(u8* emmc_cid, u64& consoleid)
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NANDMount::~NANDMount()
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{
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memcpy(emmc_cid, eMMC_CID, 16);
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consoleid = ConsoleID;
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f_unmount("0:");
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ff_disk_close();
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}
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void SetupFATCrypto(AES_ctx* ctx, u32 ctr)
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void NANDImage::SetupFATCrypto(AES_ctx* ctx, u32 ctr)
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{
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u8 iv[16];
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memcpy(iv, FATIV, sizeof(iv));
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memcpy(iv, FATIV.data(), sizeof(iv));
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u32 res;
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res = iv[15] + (ctr & 0xFF);
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@ -218,10 +200,10 @@ void SetupFATCrypto(AES_ctx* ctx, u32 ctr)
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else break;
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}
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AES_init_ctx_iv(ctx, FATKey, iv);
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AES_init_ctx_iv(ctx, FATKey.data(), iv);
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}
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u32 ReadFATBlock(u64 addr, u32 len, u8* buf)
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u32 NANDImage::ReadFATBlock(u64 addr, u32 len, u8* buf)
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{
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u32 ctr = (u32)(addr >> 4);
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@ -243,7 +225,7 @@ u32 ReadFATBlock(u64 addr, u32 len, u8* buf)
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return len;
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}
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u32 WriteFATBlock(u64 addr, u32 len, u8* buf)
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u32 NANDImage::WriteFATBlock(u64 addr, u32 len, const u8* buf)
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{
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u32 ctr = (u32)(addr >> 4);
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@ -272,30 +254,30 @@ u32 WriteFATBlock(u64 addr, u32 len, u8* buf)
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}
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UINT FF_ReadNAND(BYTE* buf, LBA_t sector, UINT num)
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UINT NANDMount::FF_ReadNAND(BYTE* buf, LBA_t sector, UINT num)
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{
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// TODO: allow selecting other partitions?
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u64 baseaddr = 0x10EE00;
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u64 blockaddr = baseaddr + (sector * 0x200ULL);
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u32 res = ReadFATBlock(blockaddr, num*0x200, buf);
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u32 res = Image->ReadFATBlock(blockaddr, num*0x200, buf);
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return res >> 9;
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}
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UINT FF_WriteNAND(BYTE* buf, LBA_t sector, UINT num)
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UINT NANDMount::FF_WriteNAND(const BYTE* buf, LBA_t sector, UINT num)
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{
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// TODO: allow selecting other partitions?
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u64 baseaddr = 0x10EE00;
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u64 blockaddr = baseaddr + (sector * 0x200ULL);
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u32 res = WriteFATBlock(blockaddr, num*0x200, buf);
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u32 res = Image->WriteFATBlock(blockaddr, num*0x200, buf);
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return res >> 9;
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}
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bool ESEncrypt(u8* data, u32 len)
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bool NANDImage::ESEncrypt(u8* data, u32 len) const
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{
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AES_ctx ctx;
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u8 iv[16];
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@ -307,7 +289,7 @@ bool ESEncrypt(u8* data, u32 len)
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iv[14] = 0x00;
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iv[15] = 0x01;
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AES_init_ctx_iv(&ctx, ESKey, iv);
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AES_init_ctx_iv(&ctx, ESKey.data(), iv);
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u32 blklen = (len + 0xF) & ~0xF;
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mac[0] = 0x3A;
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@ -380,7 +362,7 @@ bool ESEncrypt(u8* data, u32 len)
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return true;
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}
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bool ESDecrypt(u8* data, u32 len)
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bool NANDImage::ESDecrypt(u8* data, u32 len)
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{
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AES_ctx ctx;
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u8 iv[16];
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@ -392,7 +374,7 @@ bool ESDecrypt(u8* data, u32 len)
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iv[14] = 0x00;
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iv[15] = 0x01;
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AES_init_ctx_iv(&ctx, ESKey, iv);
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AES_init_ctx_iv(&ctx, ESKey.data(), iv);
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u32 blklen = (len + 0xF) & ~0xF;
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mac[0] = 0x3A;
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@ -486,7 +468,7 @@ bool ESDecrypt(u8* data, u32 len)
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}
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void ReadHardwareInfo(DSiSerialData& dataS, DSiHardwareInfoN& dataN)
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void NANDMount::ReadHardwareInfo(DSiSerialData& dataS, DSiHardwareInfoN& dataN)
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{
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FF_FIL file;
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FRESULT res;
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@ -508,7 +490,7 @@ void ReadHardwareInfo(DSiSerialData& dataS, DSiHardwareInfoN& dataN)
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}
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void ReadUserData(DSiFirmwareSystemSettings& data)
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void NANDMount::ReadUserData(DSiFirmwareSystemSettings& data)
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{
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FF_FIL file;
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FRESULT res;
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@ -557,7 +539,7 @@ void ReadUserData(DSiFirmwareSystemSettings& data)
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f_close(&file);
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}
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void PatchUserData()
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void NANDMount::PatchUserData()
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{
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FRESULT res;
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@ -653,7 +635,7 @@ void debug_listfiles(const char* path)
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f_closedir(&dir);
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}
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bool ImportFile(const char* path, const u8* data, size_t len)
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bool NANDMount::ImportFile(const char* path, const u8* data, size_t len)
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{
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if (!data || !len || !path)
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return false;
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@ -687,7 +669,7 @@ bool ImportFile(const char* path, const u8* data, size_t len)
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return true;
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}
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bool ImportFile(const char* path, const char* in)
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bool NANDMount::ImportFile(const char* path, const char* in)
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{
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FF_FIL file;
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FILE* fin;
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@ -730,7 +712,7 @@ bool ImportFile(const char* path, const char* in)
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return true;
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}
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bool ExportFile(const char* path, const char* out)
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bool NANDMount::ExportFile(const char* path, const char* out)
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{
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FF_FIL file;
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FILE* fout;
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@ -771,7 +753,7 @@ bool ExportFile(const char* path, const char* out)
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return true;
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}
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void RemoveFile(const char* path)
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void NANDMount::RemoveFile(const char* path)
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{
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FF_FILINFO info;
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FRESULT res = f_stat(path, &info);
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@ -784,7 +766,7 @@ void RemoveFile(const char* path)
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Log(LogLevel::Debug, "Removed file at %s\n", path);
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}
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void RemoveDir(const char* path)
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void NANDMount::RemoveDir(const char* path)
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{
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FF_DIR dir;
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FF_FILINFO info;
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@ -839,7 +821,7 @@ void RemoveDir(const char* path)
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}
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u32 GetTitleVersion(u32 category, u32 titleid)
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u32 NANDMount::GetTitleVersion(u32 category, u32 titleid)
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{
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FRESULT res;
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char path[256];
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@ -859,7 +841,7 @@ u32 GetTitleVersion(u32 category, u32 titleid)
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return version;
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}
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void ListTitles(u32 category, std::vector<u32>& titlelist)
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void NANDMount::ListTitles(u32 category, std::vector<u32>& titlelist)
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{
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FRESULT res;
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FF_DIR titledir;
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@ -908,7 +890,7 @@ void ListTitles(u32 category, std::vector<u32>& titlelist)
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f_closedir(&titledir);
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}
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bool TitleExists(u32 category, u32 titleid)
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bool NANDMount::TitleExists(u32 category, u32 titleid)
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{
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char path[256];
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snprintf(path, sizeof(path), "0:/title/%08x/%08x/content/title.tmd", category, titleid);
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@ -917,7 +899,7 @@ bool TitleExists(u32 category, u32 titleid)
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return (res == FR_OK);
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}
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void GetTitleInfo(u32 category, u32 titleid, u32& version, NDSHeader* header, NDSBanner* banner)
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void NANDMount::GetTitleInfo(u32 category, u32 titleid, u32& version, NDSHeader* header, NDSBanner* banner)
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{
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version = GetTitleVersion(category, titleid);
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if (version == 0xFFFFFFFF)
|
||||
@ -953,7 +935,7 @@ void GetTitleInfo(u32 category, u32 titleid, u32& version, NDSHeader* header, ND
|
||||
}
|
||||
|
||||
|
||||
bool CreateTicket(const char* path, u32 titleid0, u32 titleid1, u8 version)
|
||||
bool NANDMount::CreateTicket(const char* path, u32 titleid0, u32 titleid1, u8 version)
|
||||
{
|
||||
FF_FIL file;
|
||||
FRESULT res;
|
||||
@ -979,7 +961,7 @@ bool CreateTicket(const char* path, u32 titleid0, u32 titleid1, u8 version)
|
||||
|
||||
memset(&ticket[0x222], 0xFF, 0x20);
|
||||
|
||||
ESEncrypt(ticket, 0x2A4);
|
||||
Image->ESEncrypt(ticket, 0x2A4);
|
||||
|
||||
f_write(&file, ticket, 0x2C4, &nwrite);
|
||||
|
||||
@ -988,7 +970,7 @@ bool CreateTicket(const char* path, u32 titleid0, u32 titleid1, u8 version)
|
||||
return true;
|
||||
}
|
||||
|
||||
bool CreateSaveFile(const char* path, u32 len)
|
||||
bool NANDMount::CreateSaveFile(const char* path, u32 len)
|
||||
{
|
||||
if (len == 0) return true;
|
||||
if (len < 0x200) return false;
|
||||
@ -1078,7 +1060,7 @@ bool CreateSaveFile(const char* path, u32 len)
|
||||
return true;
|
||||
}
|
||||
|
||||
bool InitTitleFileStructure(const NDSHeader& header, const DSi_TMD::TitleMetadata& tmd, bool readonly)
|
||||
bool NANDMount::InitTitleFileStructure(const NDSHeader& header, const DSi_TMD::TitleMetadata& tmd, bool readonly)
|
||||
{
|
||||
u32 titleid0 = tmd.GetCategory();
|
||||
u32 titleid1 = tmd.GetID();
|
||||
@ -1158,7 +1140,7 @@ bool InitTitleFileStructure(const NDSHeader& header, const DSi_TMD::TitleMetadat
|
||||
return true;
|
||||
}
|
||||
|
||||
bool ImportTitle(const char* appfile, const DSi_TMD::TitleMetadata& tmd, bool readonly)
|
||||
bool NANDMount::ImportTitle(const char* appfile, const DSi_TMD::TitleMetadata& tmd, bool readonly)
|
||||
{
|
||||
NDSHeader header {};
|
||||
{
|
||||
@ -1196,7 +1178,7 @@ bool ImportTitle(const char* appfile, const DSi_TMD::TitleMetadata& tmd, bool re
|
||||
return true;
|
||||
}
|
||||
|
||||
bool ImportTitle(const u8* app, size_t appLength, const DSi_TMD::TitleMetadata& tmd, bool readonly)
|
||||
bool NANDMount::ImportTitle(const u8* app, size_t appLength, const DSi_TMD::TitleMetadata& tmd, bool readonly)
|
||||
{
|
||||
if (!app || appLength < sizeof(NDSHeader))
|
||||
return false;
|
||||
@ -1232,7 +1214,7 @@ bool ImportTitle(const u8* app, size_t appLength, const DSi_TMD::TitleMetadata&
|
||||
return true;
|
||||
}
|
||||
|
||||
void DeleteTitle(u32 category, u32 titleid)
|
||||
void NANDMount::DeleteTitle(u32 category, u32 titleid)
|
||||
{
|
||||
char fname[128];
|
||||
|
||||
@ -1243,7 +1225,7 @@ void DeleteTitle(u32 category, u32 titleid)
|
||||
RemoveDir(fname);
|
||||
}
|
||||
|
||||
u32 GetTitleDataMask(u32 category, u32 titleid)
|
||||
u32 NANDMount::GetTitleDataMask(u32 category, u32 titleid)
|
||||
{
|
||||
u32 version;
|
||||
NDSHeader header;
|
||||
@ -1260,7 +1242,7 @@ u32 GetTitleDataMask(u32 category, u32 titleid)
|
||||
return ret;
|
||||
}
|
||||
|
||||
bool ImportTitleData(u32 category, u32 titleid, int type, const char* file)
|
||||
bool NANDMount::ImportTitleData(u32 category, u32 titleid, int type, const char* file)
|
||||
{
|
||||
char fname[128];
|
||||
|
||||
@ -1286,7 +1268,7 @@ bool ImportTitleData(u32 category, u32 titleid, int type, const char* file)
|
||||
return ImportFile(fname, file);
|
||||
}
|
||||
|
||||
bool ExportTitleData(u32 category, u32 titleid, int type, const char* file)
|
||||
bool NANDMount::ExportTitleData(u32 category, u32 titleid, int type, const char* file)
|
||||
{
|
||||
char fname[128];
|
||||
|
||||
|
||||
Reference in New Issue
Block a user