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gameutil.c
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gameutil.c
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#include "gameutil.h"
#include "nandcmac.h"
#include "disadiff.h"
#include "fsutil.h" // for TAD verification
#include "game.h"
#include "nand.h" // so that we can trim NAND images
#include "itcm.h" // we need access to part of the OTP
#include "hid.h"
#include "ui.h"
#include "fs.h"
#include "unittype.h"
#include "aes.h"
#include "sha.h"
// use NCCH crypto defines for everything
#define CRYPTO_DECRYPT NCCH_NOCRYPTO
#define CRYPTO_ENCRYPT NCCH_STDCRYPTO
// partitionA path
#define PART_PATH "D:/partitionA.bin"
u32 GetCbcBlocks(FIL* file, void* buffer, u64 offset, u32 count, u8* titlekey, u8* forced_iv) {
u8 iv[16] __attribute__((aligned(4)));
UINT btr;
// sanity, get IV
if ((count % 0x10) || (offset % 0x10)) return 1; // not possible
if (forced_iv) memcpy(iv, forced_iv, 0x10);
else if ((offset < 0x10) || (fvx_lseek(file, offset - 0x10) != FR_OK) ||
(fvx_read(file, iv, 0x10, &btr) != FR_OK) || (btr != 0x10))
return 1;
// load data
if ((fvx_lseek(file, offset) != FR_OK) ||
(fvx_read(file, buffer, count, &btr) != FR_OK) || (btr != count))
return 1;
// decrypt
if (titlekey) {
setup_aeskey(0x11, titlekey);
use_aeskey(0x11);
cbc_decrypt(buffer, buffer, count / 0x10, AES_CNT_TITLEKEY_DECRYPT_MODE, iv);
}
return 0;
}
u32 GetNcchHeaders(NcchHeader* ncch, NcchExtHeader* exthdr, ExeFsHeader* exefs, FIL* file, bool nocrypto) {
u32 offset_ncch = fvx_tell(file);
UINT btr;
if (fvx_read(file, ncch, sizeof(NcchHeader), &btr) != FR_OK) return 1;
if (nocrypto) {
ncch->flags[3] = 0x00;
ncch->flags[7] = (ncch->flags[7] & ~0x21) | 0x04;
}
if (ValidateNcchHeader(ncch) != 0) return 1;
if (exthdr) {
if (!ncch->size_exthdr) return 1;
fvx_lseek(file, offset_ncch + NCCH_EXTHDR_OFFSET);
if ((fvx_read(file, exthdr, NCCH_EXTHDR_SIZE, &btr) != FR_OK) ||
(DecryptNcch((u8*) exthdr, NCCH_EXTHDR_OFFSET, NCCH_EXTHDR_SIZE, ncch, NULL) != 0))
return 1;
}
if (exefs) {
if (!ncch->size_exefs) return 1;
u32 offset_exefs = offset_ncch + (ncch->offset_exefs * NCCH_MEDIA_UNIT);
fvx_lseek(file, offset_exefs);
if ((fvx_read(file, exefs, sizeof(ExeFsHeader), &btr) != FR_OK) ||
(DecryptNcch((u8*) exefs, ncch->offset_exefs * NCCH_MEDIA_UNIT, sizeof(ExeFsHeader), ncch, NULL) != 0) ||
(ValidateExeFsHeader(exefs, ncch->size_exefs * NCCH_MEDIA_UNIT) != 0))
return 1;
}
return 0;
}
u32 CheckNcchHash(u8* expected, FIL* file, u32 size_data, u32 offset_ncch, NcchHeader* ncch, ExeFsHeader* exefs) {
u32 offset_data = fvx_tell(file) - offset_ncch;
u8 hash[32];
u8* buffer = (u8*) malloc(STD_BUFFER_SIZE);
if (!buffer) return 1;
sha_init(SHA256_MODE);
for (u32 i = 0; i < size_data; i += STD_BUFFER_SIZE) {
u32 read_bytes = min(STD_BUFFER_SIZE, (size_data - i));
UINT bytes_read;
fvx_read(file, buffer, read_bytes, &bytes_read);
DecryptNcch(buffer, offset_data + i, read_bytes, ncch, exefs);
sha_update(buffer, read_bytes);
}
sha_get(hash);
free(buffer);
return (memcmp(hash, expected, 32) == 0) ? 0 : 1;
}
u32 LoadNcchHeaders(NcchHeader* ncch, NcchExtHeader* exthdr, ExeFsHeader* exefs, const char* path, u32 offset) {
FIL file;
// open file, get NCCH header
if (fvx_open(&file, path, FA_READ | FA_OPEN_EXISTING) != FR_OK)
return 1;
fvx_lseek(&file, offset);
if (GetNcchHeaders(ncch, exthdr, exefs, &file, false) != 0) {
fvx_close(&file);
return 1;
}
fvx_close(&file);
return 0;
}
u32 LoadNcsdHeader(NcsdHeader* ncsd, const char* path) {
FIL file;
UINT btr;
// open file, get NCSD header
if (fvx_open(&file, path, FA_READ | FA_OPEN_EXISTING) != FR_OK)
return 1;
fvx_lseek(&file, 0);
if ((fvx_read(&file, ncsd, sizeof(NcsdHeader), &btr) != FR_OK) ||
(ValidateNcsdHeader(ncsd) != 0)) {
fvx_close(&file);
return 1;
}
fvx_close(&file);
return 0;
}
u32 LoadCiaStub(CiaStub* stub, const char* path) {
FIL file;
UINT btr;
CiaInfo info;
if (fvx_open(&file, path, FA_READ | FA_OPEN_EXISTING) != FR_OK)
return 1;
// first 0x20 byte of CIA header
fvx_lseek(&file, 0);
if ((fvx_read(&file, stub, 0x20, &btr) != FR_OK) || (btr != 0x20) ||
(ValidateCiaHeader(&(stub->header)) != 0)) {
fvx_close(&file);
return 1;
}
GetCiaInfo(&info, &(stub->header));
// everything up till content offset
fvx_lseek(&file, 0);
if ((fvx_read(&file, stub, info.offset_content, &btr) != FR_OK) || (btr != info.offset_content)) {
fvx_close(&file);
return 1;
}
fvx_close(&file);
return 0;
}
u32 LoadExeFsFile(void* data, const char* path, u32 offset, const char* name, u32 size_max, u32* bytes_read) {
NcchHeader ncch;
ExeFsHeader exefs;
FIL file;
UINT btr;
u32 ret = 0;
// open file, get NCCH, ExeFS header
if (fvx_open(&file, path, FA_READ | FA_OPEN_EXISTING) != FR_OK)
return 1;
fvx_lseek(&file, offset);
if ((GetNcchHeaders(&ncch, NULL, &exefs, &file, false) != 0) ||
(!ncch.size_exefs)) {
fvx_close(&file);
return 1;
}
// load file from exefs
ExeFsFileHeader* exefile = NULL;
for (u32 i = 0; i < 10; i++) {
u32 size = exefs.files[i].size;
if (!size || (size > size_max)) continue;
char* exename = exefs.files[i].name;
if (strncmp(name, exename, 8) == 0) {
exefile = exefs.files + i;
break;
}
}
if (exefile) {
u32 size_exefile = exefile->size;
u32 offset_exefile = (ncch.offset_exefs * NCCH_MEDIA_UNIT) + sizeof(ExeFsHeader) + exefile->offset;
fvx_lseek(&file, offset + offset_exefile); // offset to file
if ((fvx_read(&file, data, size_exefile, &btr) != FR_OK) ||
(DecryptNcch(data, offset_exefile, size_exefile, &ncch, &exefs) != 0) ||
(btr != size_exefile)) {
ret = 1;
}
} else ret = 1;
if (bytes_read) *bytes_read = btr;
fvx_close(&file);
return ret;
}
u32 LoadNcchMeta(CiaMeta* meta, const char* path, u64 offset) {
NcchHeader ncch;
NcchExtHeader exthdr;
// get dependencies from exthdr, icon from exeFS
if ((LoadNcchHeaders(&ncch, &exthdr, NULL, path, offset) != 0) ||
(BuildCiaMeta(meta, &exthdr, NULL) != 0) ||
(LoadExeFsFile(meta->smdh, path, offset, "icon", sizeof(meta->smdh), NULL)))
return 1;
return 0;
}
u32 LoadTmdFile(TitleMetaData* tmd, const char* path) {
// first part (TMD stub only) (we need to read the content count first)
if (fvx_qread(path, tmd, 0, TMD_SIZE_STUB, NULL) != FR_OK)
return 1;
// sanity check
if (getbe16(tmd->content_count) > TMD_MAX_CONTENTS)
return 1;
// second part (read full size)
if (ValidateTmd(tmd) == 0) {
if (fvx_qread(path, tmd, 0, TMD_SIZE_N(getbe16(tmd->content_count)), NULL) != FR_OK)
return 1;
} else if ((ValidateTwlTmd(tmd) == 0) && (getbe16(tmd->content_count) == 1)) {
// for TWL: convert to new TMD format
static const u8 magic[] = { TMD_SIG_TYPE };
memcpy(tmd->sig_type, magic, sizeof(magic));
strncpy((char*) tmd->issuer, TMD_ISSUER, 0x40);
memset(((u8*) tmd) + TMD_SIZE_STUB, 0x00, TMD_SIZE_N(1) - TMD_SIZE_STUB);
(tmd->contentinfo)->cmd_count[1] = 0x01;
// convert and take over chunk (SHA-1 hash stays)
TmdContentChunk* chunk = (TmdContentChunk*) (void*) (tmd + 1);
if ((fvx_qread(path, chunk, TMD_SIZE_STUB, 0x24, NULL) != FR_OK) ||
(FixTmdHashes(tmd) != 0))
return 1;
}
return 0;
}
u32 LoadTicketFile(Ticket** ticket, const char* path_tik) {
if(!ticket) return 1;
// load and check ticket
TicketMinimum tmp;
UINT br;
if (fvx_qread(path_tik, &tmp, 0, TICKET_MINIMUM_SIZE, &br) != FR_OK)
return 1;
// check type of ticket, set size
u32 tik_size = 0;
if ((br == TICKET_MINIMUM_SIZE) && (ValidateTicket((Ticket*)&tmp) == 0)) {
// standard 3DS ticket
tik_size = GetTicketSize((Ticket*)&tmp);
} else if ((br == TICKET_TWL_SIZE) && (ValidateTwlTicket((Ticket*)&tmp) == 0)) {
// TWL ticket
tik_size = TICKET_COMMON_SIZE;
} else return 1;
Ticket* tik = (Ticket*)malloc(tik_size);
if (!tik) return 1;
if (br == TICKET_MINIMUM_SIZE) { // standard 3DS ticket
if ((fvx_qread(path_tik, tik, 0, tik_size, &br) != FR_OK) || (br != tik_size)) {
free(tik);
return 1;
}
} else { // TWL ticket (just take over title id and key)
BuildFakeTicket(tik, tmp.title_id);
memcpy(tik->titlekey, tmp.titlekey, 0x10);
}
*ticket = tik;
return 0;
}
u32 LoadCdnTicketFile(Ticket** ticket, const char* path_cnt) {
// path points to CDN content file
char path_cetk[256];
strncpy(path_cetk, path_cnt, 256);
path_cetk[255] = '\0';
char* name_cetk = strrchr(path_cetk, '/');
if (!name_cetk) return 1; // will not happen
name_cetk++;
snprintf(name_cetk, sizeof(path_cetk) - (name_cetk - path_cetk), "cetk");
// ticket is loaded and validated here
return LoadTicketFile(ticket, path_cetk);
}
u32 LoadTicketForTitleId(Ticket** ticket, const u64 title_id) {
u8 tid[8];
for (u32 i = 0; i < 8; i++)
tid[7-i] = (title_id >> (i*8)) & 0xFF;
// ensure remounting the old mount path
char path_store[256] = { 0 };
char* path_bak = NULL;
strncpy(path_store, GetMountPath(), 256);
if (*path_store) path_bak = path_store;
// path to ticket.db
char path_ticketdb[32];
char drv = *path_store;
snprintf(path_ticketdb, sizeof(path_ticketdb), "%2.2s/dbs/ticket.db",
((drv == 'B') || (drv == '5') || (drv == '4')) ? "4:" : "1:");
// load ticket
if (!InitImgFS(path_ticketdb) ||
((ReadTicketFromDB(PART_PATH, tid, ticket)) != 0))
*ticket = NULL;
// remount old path
InitImgFS(path_bak);
return (*ticket) ? 0 : 1;
}
u32 GetTmdContentPath(char* path_content, const char* path_tmd) {
// path_content should be 256 bytes in size!
// get path to TMD first content
static const u8 dlc_tid_high[] = { DLC_TID_HIGH };
// content path string
char* name_content;
snprintf(path_content, 256, "%s", path_tmd);
path_content[255] = '\0';
name_content = strrchr(path_content, '/');
if (!name_content) return 1; // will not happen
name_content++;
// CDN content?
bool cdn = IdentifyFileType(path_tmd) & (GAME_CDNTMD|GAME_TWLTMD);
// load TMD file
TitleMetaData* tmd = (TitleMetaData*) malloc(TMD_SIZE_MAX);
TmdContentChunk* chunk = (TmdContentChunk*) (tmd + 1);
if (!tmd) return 1;
if ((LoadTmdFile(tmd, path_tmd) != 0) || !getbe16(tmd->content_count)) {
free(tmd);
return 1;
}
snprintf(name_content, 256 - (name_content - path_content), cdn ? "%08lx" :
(memcmp(tmd->title_id, dlc_tid_high, sizeof(dlc_tid_high)) == 0) ? "00000000/%08lx.app" : "%08lx.app", getbe32(chunk->id));
free(tmd);
return 0;
}
u32 GetTieTmdPath(char* path_tmd, const char* path_tie) {
char drv[3] = { 0x00 };
u64 tid64 = 0;
// this relies on:
// 1: titleinfo entries are only loaded from mounted [1/4/A/B]:/dbs/title.db
// 2: filename starts with title id
// basic sanity check
if (*path_tie != 'T') return 1;
// get title id
if (sscanf(path_tie, "T:/%016llx", &tid64) != 1) return 1;
u32 tid_high = (u32) ((tid64 >> 32) & 0xFFFFFFFF);
u32 tid_low = (u32) (tid64 & 0xFFFFFFFF);
// load TitleDB entry file
TitleInfoEntry tie;
if (fvx_qread(path_tie, &tie, 0, sizeof(TitleInfoEntry), NULL) != FR_OK)
return 1;
// determine the drive
const char* mntpath = GetMountPath();
if (!mntpath || !*mntpath) return 1;
strncpy(drv, mntpath, 2);
if (tid_high & 0x8000) {
if (*drv == '1') *drv = '2';
if (*drv == '4') *drv = '5';
tid_high = 0x00030000 | (tid_high&0xFF);
}
// build the path
snprintf(path_tmd, 64, "%2.2s/title/%08lX/%08lX/content/%08lx.tmd",
drv, tid_high, tid_low, tie.tmd_content_id);
// done
return 0;
}
u32 GetTieContentPath(char* path_content, const char* path_tie) {
char path_tmd[64];
// get the TMD path first
if (GetTieTmdPath(path_tmd, path_tie) != 0)
return 1;
// let the TMD content path function take over
return GetTmdContentPath(path_content, path_tmd);
}
u32 GetTitleIdTmdPath(char* path_tmd, const u64 title_id, bool from_emunand) {
u32 tid_high = (u32) ((title_id >> 32) & 0xFFFFFFFF);
u32 tid_low = (u32) (title_id & 0xFFFFFFFF);
char* drv = from_emunand ?
((tid_high & 0x8000) ? "5:" : ((tid_high & 0x10) ? "4:" : "B:")) :
((tid_high & 0x8000) ? "2:" : ((tid_high & 0x10) ? "1:" : "A:"));
if (tid_high & 0x8000) tid_high = 0x00030000 | (tid_high&0xFF);
char path_pat[64];
snprintf(path_pat, sizeof(path_pat), "%2.2s/title/%08lX/%08lX/content/*.tmd",
drv, tid_high, tid_low);
if (fvx_findpath(path_tmd, path_pat, FN_HIGHEST) != FR_OK)
return 1;
// done
return 0;
}
u32 GetTicketContentPath(char* path_content, const char* path_tik) {
char path_tmd[256];
bool from_emunand = false;
u64 tid64 = 0;
// available for all tickets, but will fail for titles not installed
// from mounted ticket.db?
if (*path_tik == 'T') {
const char* mntpath = GetMountPath();
from_emunand = (mntpath && (*mntpath == '4'));
}
// load ticket, get title id
Ticket ticket;
if (fvx_qread(path_tik, &ticket, 0, sizeof(Ticket), NULL) != FR_OK)
return 1;
tid64 = getbe64(ticket.title_id);
// get the TMD path
if (GetTitleIdTmdPath(path_tmd, tid64, from_emunand) != 0)
return 1;
// let the TMD content path function take over
return GetTmdContentPath(path_content, path_tmd);
}
u32 WriteCiaStub(CiaStub* stub, const char* path) {
FIL file;
UINT btw;
CiaInfo info;
GetCiaInfo(&info, &(stub->header));
// everything up till content offset
if (fvx_open(&file, path, FA_WRITE | FA_OPEN_ALWAYS) != FR_OK)
return 1;
fvx_lseek(&file, 0);
if ((fvx_write(&file, stub, info.offset_content, &btw) != FR_OK) || (btw != info.offset_content)) {
fvx_close(&file);
return 1;
}
fvx_close(&file);
return 0;
}
u32 VerifyTmdContent(const char* path, u64 offset, TmdContentChunk* chunk, const u8* titlekey) {
u8 hash[32] = { 0 };
u8 ctr[16];
FIL file;
u8* expected = chunk->hash;
u64 size = getbe64(chunk->size);
bool encrypted = getbe16(chunk->type) & 0x1;
if (!ShowProgress(0, 0, path)) return 1;
if (fvx_open(&file, path, FA_READ | FA_OPEN_EXISTING) != FR_OK)
return 1;
if (offset + size > fvx_size(&file)) {
fvx_close(&file);
return 1;
}
fvx_lseek(&file, offset);
u8* buffer = (u8*) malloc(STD_BUFFER_SIZE);
if (!buffer) {
fvx_close(&file);
return 1;
}
u32 mode = SHA1_MODE;
for (u32 i = 20; i < 32; i++)
if (expected[i]) mode = SHA256_MODE;
GetTmdCtr(ctr, chunk);
sha_init(mode);
for (u32 i = 0; i < size; i += STD_BUFFER_SIZE) {
u32 read_bytes = min(STD_BUFFER_SIZE, (size - i));
UINT bytes_read;
fvx_read(&file, buffer, read_bytes, &bytes_read);
if (encrypted) DecryptCiaContentSequential(buffer, read_bytes, ctr, titlekey);
sha_update(buffer, read_bytes);
if (!ShowProgress(i + read_bytes, size, path)) break;
}
sha_get(hash);
free(buffer);
fvx_close(&file);
return memcmp(hash, expected, 32);
}
u32 VerifyNcchFile(const char* path, u32 offset, u32 size) {
static bool cryptofix_always = false;
bool cryptofix = false;
NcchHeader ncch;
NcchExtHeader exthdr;
ExeFsHeader exefs;
FIL file;
char pathstr[UTF_BUFFER_BYTESIZE(32)];
TruncateString(pathstr, path, 32, 8);
// open file, get NCCH, ExeFS header
if (fvx_open(&file, path, FA_READ | FA_OPEN_EXISTING) != FR_OK)
return 1;
// fetch and check NCCH header
fvx_lseek(&file, offset);
if (GetNcchHeaders(&ncch, NULL, NULL, &file, cryptofix) != 0) {
if (!offset) ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_NOT_NCCH_FILE);
fvx_close(&file);
return 1;
}
// check NCCH size
if (!size) size = fvx_size(&file) - offset;
if ((fvx_size(&file) < offset) || (size < ncch.size * NCCH_MEDIA_UNIT)) {
if (!offset) ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_FILE_IS_TOO_SMALL);
fvx_close(&file);
return 1;
}
// fetch and check ExeFS header
fvx_lseek(&file, offset);
if (ncch.size_exefs && (GetNcchHeaders(&ncch, NULL, &exefs, &file, cryptofix) != 0)) {
bool borkedflags = false;
if (ncch.size_exefs && NCCH_ENCRYPTED(&ncch)) {
// disable crypto, try again
cryptofix = true;
fvx_lseek(&file, offset);
if (GetNcchHeaders(&ncch, NULL, &exefs, &file, cryptofix) == 0) {
if (cryptofix_always) borkedflags = true;
else {
const char* optionstr[3] = { STR_ATTEMPT_FIX_THIS_TIME, STR_ATTEMPT_FIX_ALWAYS, STR_ABORT_VERIFICATION };
u32 user_select = ShowSelectPrompt(3, optionstr, "%s\n%s", pathstr, STR_ERROR_BAD_CRYPTO_FLAGS);
if ((user_select == 1) || (user_select == 2)) borkedflags = true;
if (user_select == 2) cryptofix_always = true;
}
}
}
if (!borkedflags) {
if (!offset) ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_BAD_EXEFS_HEADER);
fvx_close(&file);
return 1;
}
}
// fetch and check ExtHeader
fvx_lseek(&file, offset);
if (ncch.size_exthdr && (GetNcchHeaders(&ncch, &exthdr, NULL, &file, cryptofix) != 0)) {
if (!offset) ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_MISSING_EXTHEADER);
fvx_close(&file);
return 1;
}
// check / setup crypto
if (SetupNcchCrypto(&ncch, NCCH_NOCRYPTO) != 0) {
if (!offset) ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_CRYPTO_NOT_SET_UP);
fvx_close(&file);
return 1;
}
u32 ver_exthdr = 0;
u32 ver_exefs = 0;
u32 ver_romfs = 0;
// base hash check for extheader
if (ncch.size_exthdr > 0) {
fvx_lseek(&file, offset + NCCH_EXTHDR_OFFSET);
ver_exthdr = CheckNcchHash(ncch.hash_exthdr, &file, 0x400, offset, &ncch, NULL);
}
// base hash check for exefs
if (ncch.size_exefs > 0) {
fvx_lseek(&file, offset + (ncch.offset_exefs * NCCH_MEDIA_UNIT));
ver_exefs = CheckNcchHash(ncch.hash_exefs, &file, ncch.size_exefs_hash * NCCH_MEDIA_UNIT, offset, &ncch, &exefs);
}
// base hash check for romfs
if (ncch.size_romfs > 0) {
fvx_lseek(&file, offset + (ncch.offset_romfs * NCCH_MEDIA_UNIT));
ver_romfs = CheckNcchHash(ncch.hash_romfs, &file, ncch.size_romfs_hash * NCCH_MEDIA_UNIT, offset, &ncch, NULL);
}
// thorough exefs verification (workaround for Process9)
if (!ShowProgress(0, 0, path)) return 1;
if ((ncch.size_exefs > 0) && (memcmp(exthdr.name, "Process9", 8) != 0)) {
for (u32 i = 0; !ver_exefs && (i < 10); i++) {
ExeFsFileHeader* exefile = exefs.files + i;
u8* hash = exefs.hashes[9 - i];
if (!exefile->size) continue;
fvx_lseek(&file, offset + (ncch.offset_exefs * NCCH_MEDIA_UNIT) + 0x200 + exefile->offset);
ver_exefs = CheckNcchHash(hash, &file, exefile->size, offset, &ncch, &exefs);
}
}
// thorough romfs verification
if (!ver_romfs && (ncch.size_romfs > 0)) {
UINT btr;
// load ivfc header
RomFsIvfcHeader ivfc;
fvx_lseek(&file, offset + (ncch.offset_romfs * NCCH_MEDIA_UNIT));
if ((fvx_read(&file, &ivfc, sizeof(RomFsIvfcHeader), &btr) != FR_OK) ||
(DecryptNcch((u8*) &ivfc, ncch.offset_romfs * NCCH_MEDIA_UNIT, sizeof(RomFsIvfcHeader), &ncch, NULL) != 0) )
ver_romfs = 1;
// load data
u64 lvl1_size = 0;
u64 lvl2_size = 0;
u8* masterhash = NULL;
u8* lvl1_data = NULL;
u8* lvl2_data = NULL;
if (!ver_romfs && (ValidateRomFsHeader(&ivfc, ncch.size_romfs * NCCH_MEDIA_UNIT) == 0)) {
// load masterhash(es)
masterhash = malloc(ivfc.size_masterhash);
if (masterhash) {
u64 offset_add = (ncch.offset_romfs * NCCH_MEDIA_UNIT) + sizeof(RomFsIvfcHeader);
fvx_lseek(&file, offset + offset_add);
if ((fvx_read(&file, masterhash, ivfc.size_masterhash, &btr) != FR_OK) ||
(DecryptNcch(masterhash, offset_add, ivfc.size_masterhash, &ncch, NULL) != 0))
ver_romfs = 1;
}
// load lvl1
lvl1_size = align(ivfc.size_lvl1, 1 << ivfc.log_lvl1);
lvl1_data = malloc(lvl1_size);
if (lvl1_data) {
u64 offset_add = (ncch.offset_romfs * NCCH_MEDIA_UNIT) + GetRomFsLvOffset(&ivfc, 1);
fvx_lseek(&file, offset + offset_add);
if ((fvx_read(&file, lvl1_data, lvl1_size, &btr) != FR_OK) ||
(DecryptNcch(lvl1_data, offset_add, lvl1_size, &ncch, NULL) != 0))
ver_romfs = 1;
}
// load lvl2
lvl2_size = align(ivfc.size_lvl2, 1 << ivfc.log_lvl2);
lvl2_data = malloc(lvl2_size);
if (lvl2_data) {
u64 offset_add = (ncch.offset_romfs * NCCH_MEDIA_UNIT) + GetRomFsLvOffset(&ivfc, 2);
fvx_lseek(&file, offset + offset_add);
if ((fvx_read(&file, lvl2_data, lvl2_size, &btr) != FR_OK) ||
(DecryptNcch(lvl2_data, offset_add, lvl2_size, &ncch, NULL) != 0))
ver_romfs = 1;
}
// check mallocs
if (!masterhash || !lvl1_data || !lvl2_data)
ver_romfs = 1; // should never happen
}
// actual verification
if (!ver_romfs) {
// verify lvl1
u32 n_blocks = lvl1_size >> ivfc.log_lvl1;
u32 block_log = ivfc.log_lvl1;
for (u32 i = 0; !ver_romfs && (i < n_blocks); i++)
ver_romfs = (u32) sha_cmp(masterhash + (i*0x20), lvl1_data + (i<<block_log), 1<<block_log, SHA256_MODE);
// verify lvl2
n_blocks = lvl2_size >> ivfc.log_lvl2;
block_log = ivfc.log_lvl2;
for (u32 i = 0; !ver_romfs && (i < n_blocks); i++) {
ver_romfs = sha_cmp(lvl1_data + (i*0x20), lvl2_data + (i<<block_log), 1<<block_log, SHA256_MODE);
}
// lvl3 verification (this will take long)
u64 offset_add = (ncch.offset_romfs * NCCH_MEDIA_UNIT) + GetRomFsLvOffset(&ivfc, 3);
n_blocks = align(ivfc.size_lvl3, 1 << ivfc.log_lvl3) >> ivfc.log_lvl3;
block_log = ivfc.log_lvl3;
fvx_lseek(&file, offset + offset_add);
for (u32 i = 0; !ver_romfs && (i < n_blocks); i++) {
ver_romfs = CheckNcchHash(lvl2_data + (i*0x20), &file, 1 << block_log, offset, &ncch, NULL);
offset_add += 1 << block_log;
if (!(i % 16) && !ShowProgress(i+1, n_blocks, path)) ver_romfs = 1;
}
}
if (masterhash) free(masterhash);
if (lvl1_data) free(lvl1_data);
if (lvl2_data) free(lvl2_data);
}
if (!offset && (ver_exthdr|ver_exefs|ver_romfs)) { // verification summary
ShowPrompt(false, STR_PATH_NCCH_VERIFICATION_FAILED_INFO, pathstr,
(!ncch.size_exthdr) ? "-" : (ver_exthdr == 0) ? STR_OK : STR_FAIL,
(!ncch.size_exefs) ? "-" : (ver_exefs == 0) ? STR_OK : STR_FAIL,
(!ncch.size_romfs) ? "-" : (ver_romfs == 0) ? STR_OK : STR_FAIL);
}
fvx_close(&file);
if (cryptofix) fvx_qwrite(path, &ncch, offset, sizeof(NcchHeader), NULL);
return ver_exthdr|ver_exefs|ver_romfs;
}
u32 VerifyNcsdFile(const char* path) {
NcsdHeader ncsd;
// path string
char pathstr[UTF_BUFFER_BYTESIZE(32)];
TruncateString(pathstr, path, 32, 8);
// load NCSD header
if (LoadNcsdHeader(&ncsd, path) != 0) {
ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_NOT_NCSD_FILE);
return 1;
}
// validate NCSD contents
for (u32 i = 0; i < 8; i++) {
NcchPartition* partition = ncsd.partitions + i;
u32 offset = partition->offset * NCSD_MEDIA_UNIT;
u32 size = partition->size * NCSD_MEDIA_UNIT;
if (!size) continue;
if (VerifyNcchFile(path, offset, size) != 0) {
ShowPrompt(false, STR_PATH_CONTENT_N_SIZE_AT_OFFSET_VERIFICATION_FAILED,
pathstr, i, size, offset);
return 1;
}
}
return 0;
}
u32 VerifyCiaFile(const char* path) {
CiaStub* cia = (CiaStub*) malloc(sizeof(CiaStub));
CiaInfo info;
u8 titlekey[16];
if (!cia) return 1;
// path string
char pathstr[UTF_BUFFER_BYTESIZE(32)];
TruncateString(pathstr, path, 32, 8);
// load CIA stub
if ((LoadCiaStub(cia, path) != 0) ||
(GetCiaInfo(&info, &(cia->header)) != 0) ||
(GetTitleKey(titlekey, (Ticket*)&(cia->ticket)) != 0)) {
ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_PROBABLY_NOT_CIA_FILE);
free(cia);
return 1;
}
// verify TMD
if (VerifyTmd(&(cia->tmd)) != 0) {
ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_TMD_PROBABLY_CORRUPTED);
free(cia);
return 1;
}
// verify contents
u32 content_count = getbe16(cia->tmd.content_count);
u64 next_offset = info.offset_content;
u8* cnt_index = cia->header.content_index;
for (u32 i = 0; (i < content_count) && (i < TMD_MAX_CONTENTS); i++) {
TmdContentChunk* chunk = &(cia->content_list[i]);
u16 index = getbe16(chunk->index);
if (!(cnt_index[index/8] & (1 << (7-(index%8))))) continue; // don't check missing contents
if (VerifyTmdContent(path, next_offset, chunk, titlekey) != 0) {
ShowPrompt(false, STR_PATH_ID_N_SIZE_AT_OFFSET_VERIFICATION_FAILED,
pathstr, getbe32(chunk->id), getbe64(chunk->size), next_offset);
free(cia);
return 1;
}
next_offset += getbe64(chunk->size);
}
free(cia);
return 0;
}
u32 VerifyTmdFile(const char* path, bool cdn) {
static const u8 dlc_tid_high[] = { DLC_TID_HIGH };
bool ignore_missing_dlc = false;
// path string
char pathstr[UTF_BUFFER_BYTESIZE(32)];
TruncateString(pathstr, path, 32, 8);
// content path string
char path_content[256];
char* name_content;
strncpy(path_content, path, 256);
path_content[255] = '\0';
name_content = strrchr(path_content, '/');
if (!name_content) return 1; // will not happen
name_content++;
// load TMD file
TitleMetaData* tmd = (TitleMetaData*) malloc(TMD_SIZE_MAX);
TmdContentChunk* content_list = (TmdContentChunk*) (tmd + 1);
if ((LoadTmdFile(tmd, path) != 0) || (VerifyTmd(tmd) != 0)) {
ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_TMD_PROBABLY_CORRUPTED);
free(tmd);
return 1;
}
u8 titlekey[0x10] = { 0xFF };
if (cdn) { // load / build ticket (for titlekey / CDN only)
Ticket* ticket = NULL;
if (!((LoadCdnTicketFile(&ticket, path) == 0) ||
((ticket = (Ticket*)malloc(TICKET_COMMON_SIZE), ticket != NULL) &&
(BuildFakeTicket(ticket, tmd->title_id) == 0) &&
(FindTitleKey(ticket, tmd->title_id) == 0))) ||
(GetTitleKey(titlekey, ticket) != 0)) {
ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_CDN_TITLEKEY_NOT_FOUND);
free(ticket);
free(tmd);
return 1;
}
free(ticket);
}
// verify contents
u32 content_count = getbe16(tmd->content_count);
bool dlc = (memcmp(tmd->title_id, dlc_tid_high, sizeof(dlc_tid_high)) == 0);
u32 res = 0;
for (u32 i = 0; !res && (i < content_count) && (i < TMD_MAX_CONTENTS); i++) {
TmdContentChunk* chunk = &(content_list[i]);
if (!cdn) chunk->type[1] &= ~0x01; // remove crypto flag
snprintf(name_content, 256 - (name_content - path_content),
(cdn) ? "%08lx" : (dlc) ? "00000000/%08lx.app" : "%08lx.app", getbe32(chunk->id));
TruncateString(pathstr, path_content, 32, 8);
if (dlc && i && !PathExist(path_content)) {
if (!ignore_missing_dlc && !ShowPrompt(true, "%s\n%s", pathstr, STR_DLC_CONTENT_IS_MISSING_IGNORE_ALL_AND_CONTINUE)) res = 1;
ignore_missing_dlc = true;
continue;
}
if (VerifyTmdContent(path_content, 0, chunk, titlekey) != 0) {
ShowPrompt(false, "%s\n%s", pathstr, PathExist(path_content) ? STR_VERIFICATION_FAILED : STR_CONTENT_IS_MISSING);
res = 1;
}
}
free(tmd);
return res;
}
u32 VerifyTieFile(const char* path) {
char path_tmd[64];
// get the TMD path
if (GetTieTmdPath(path_tmd, path) != 0)
return 1;
// let the TMD verificator take over
return VerifyTmdFile(path_tmd, false);
}
u32 VerifyTadFile(const char* path) {
TadStub tad;
TadHeader* hdr = &(tad.header);
TadFooter* ftr = &(tad.footer);
// only works for GM9 decrypted TAD files
if (!ShowProgress(0, 0, path)) return 1;
if ((fvx_qread(path, &tad, 0, sizeof(TadStub), NULL) != FR_OK) ||
(VerifyTadStub(&tad) != 0))
return 1;
// verify contents
u32 content_start = sizeof(TadStub);
for (u32 i = 0; i < TAD_NUM_CONTENT; i++) {
u8 hash[32];
u32 len = align(hdr->content_size[i], 0x10);
if (!len) continue; // non-existant section
if (!FileGetSha(path, hash, content_start, len, false) ||
(memcmp(hash, ftr->content_sha256[i], 32) != 0))
return 1;
content_start += len + sizeof(TadBlockMetaData);
}
return 0;
}
u32 VerifyFirmFile(const char* path) {
char pathstr[UTF_BUFFER_BYTESIZE(32)];
TruncateString(pathstr, path, 32, 8);
void* firm_buffer = (void*) malloc(FIRM_MAX_SIZE);
if (!firm_buffer) return 1;
// load the whole FIRM into memory
u32 firm_size = fvx_qsize(path);
if ((firm_size > FIRM_MAX_SIZE) || (fvx_qread(path, firm_buffer, 0, firm_size, NULL) != FR_OK) ||
(ValidateFirmHeader(firm_buffer, firm_size) != 0)) {
free(firm_buffer);
return 1;
}
// hash verify all available sections
FirmHeader header;
memcpy(&header, firm_buffer, sizeof(FirmHeader));
for (u32 i = 0; i < 4; i++) {
FirmSectionHeader* sct = header.sections + i;
void* section = ((u8*) firm_buffer) + sct->offset;
if (!(sct->size)) continue;
if (sha_cmp(sct->hash, section, sct->size, SHA256_MODE) != 0) {
ShowPrompt(false, STR_PATH_SECTION_N_HASH_MISMATCH, pathstr, i);
free(firm_buffer);
return 1;
}
}
// no arm11 / arm9 entrypoints?
if (!header.entry_arm9) {
ShowPrompt(false, "%s\n%s", pathstr, STR_ARM9_ENTRYPOINT_IS_MISSING);
free(firm_buffer);
return 1;
} else if (!header.entry_arm11) {
ShowPrompt(false, "%s\n%s", pathstr, STR_WARNING_ARM11_ENTRYPOINT_IS_MISSING);
}
free(firm_buffer);
return 0;
}
u32 VerifyBossFile(const char* path) {
BossHeader boss;
u32 payload_size;
bool encrypted = false;
FIL file;
UINT btr;
char pathstr[UTF_BUFFER_BYTESIZE(32)];
TruncateString(pathstr, path, 32, 8);
// read file header
if (fvx_open(&file, path, FA_READ | FA_OPEN_EXISTING) != FR_OK)
return 1;
fvx_lseek(&file, 0);
if ((fvx_read(&file, &boss, sizeof(BossHeader), &btr) != FR_OK) ||
(btr != sizeof(BossHeader)) || (ValidateBossHeader(&boss, 0) != 0)) {
ShowPrompt(false, "%s\n%s", pathstr, STR_ERROR_NOT_A_BOSS_FILE);
fvx_close(&file);
return 1;
}
// get / check size
payload_size = getbe32(boss.filesize) - sizeof(BossHeader);
if (!payload_size) {
fvx_close(&file);
return 1;
}
// check if encrypted, decrypt if required
encrypted = (CheckBossEncrypted(&boss) == 0);
if (encrypted) CryptBoss((void*) &boss, 0, sizeof(BossHeader), &boss);
// set up a buffer
u8* buffer = (u8*) malloc(STD_BUFFER_SIZE);
if (!buffer) {
fvx_close(&file);
return 1;
}
// actual hash calculation & compare
u8 hash[32];
sha_init(SHA256_MODE);
GetBossPayloadHashHeader(buffer, &boss);
u32 read_bytes = min((STD_BUFFER_SIZE - BOSS_SIZE_PAYLOAD_HEADER), payload_size);
fvx_read(&file, buffer + BOSS_SIZE_PAYLOAD_HEADER, read_bytes, &btr);
if (encrypted) CryptBoss(buffer + BOSS_SIZE_PAYLOAD_HEADER, sizeof(BossHeader), read_bytes, &boss);
sha_update(buffer, read_bytes + BOSS_SIZE_PAYLOAD_HEADER);
for (u32 i = read_bytes; i < payload_size; i += STD_BUFFER_SIZE) {
read_bytes = min(STD_BUFFER_SIZE, (payload_size - i));
fvx_read(&file, buffer, read_bytes, &btr);