Atmosphere/stratosphere/fs_mitm/source/fsmitm_utils.cpp

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#include <switch.h>
#include <stratosphere.hpp>
#include <atomic>
#include <algorithm>
#include "sm_mitm.h"
#include "debug.hpp"
#include "fsmitm_utils.hpp"
static FsFileSystem g_sd_filesystem = {0};
static std::vector<u64> g_mitm_flagged_tids;
static std::atomic_bool g_has_initialized = false;
static bool IsHexadecimal(const char *str) {
while (*str) {
if (('0' <= *str && *str <= '9') ||
('a' <= *str && *str <= 'f') ||
('A' <= *str && *str <= 'F')) {
str++;
} else {
return false;
}
}
return true;
}
void Utils::InitializeSdThreadFunc(void *args) {
/* Get required services. */
Handle tmp_hnd = 0;
static const char * const required_active_services[] = {"pcv", "gpio", "pinmux", "psc:c"};
for (unsigned int i = 0; i < sizeof(required_active_services) / sizeof(required_active_services[0]); i++) {
if (R_FAILED(smGetServiceOriginal(&tmp_hnd, smEncodeName(required_active_services[i])))) {
/* TODO: Panic */
} else {
svcCloseHandle(tmp_hnd);
}
}
/* Mount SD. */
while (R_FAILED(fsMountSdcard(&g_sd_filesystem))) {
svcSleepThread(1000ULL);
}
/* Check for MitM flags. */
FsDir titles_dir;
if (R_SUCCEEDED(fsFsOpenDirectory(&g_sd_filesystem, "/atmosphere/titles", FS_DIROPEN_DIRECTORY, &titles_dir))) {
FsDirectoryEntry dir_entry;
FsFile f;
u64 read_entries;
while (R_SUCCEEDED((fsDirRead(&titles_dir, 0, &read_entries, 1, &dir_entry))) && read_entries == 1) {
if (strlen(dir_entry.name) == 0x10 && IsHexadecimal(dir_entry.name)) {
u64 title_id = strtoul(dir_entry.name, NULL, 16);
char title_path[FS_MAX_PATH] = {0};
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strcpy(title_path, "/atmosphere/titles/");
strcat(title_path, dir_entry.name);
strcat(title_path, "/fsmitm.flag");
if (R_SUCCEEDED(fsFsOpenFile(&g_sd_filesystem, title_path, FS_OPEN_READ, &f))) {
g_mitm_flagged_tids.push_back(title_id);
fsFileClose(&f);
}
}
}
fsDirClose(&titles_dir);
}
g_has_initialized = true;
svcExitThread();
}
bool Utils::IsSdInitialized() {
return g_has_initialized;
}
Result Utils::OpenSdFile(const char *fn, int flags, FsFile *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return fsFsOpenFile(&g_sd_filesystem, fn, flags, out);
}
Result Utils::OpenSdFileForAtmosphere(u64 title_id, const char *fn, int flags, FsFile *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
char path[FS_MAX_PATH];
if (*fn == '/') {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx%s", title_id, fn);
} else {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx/%s", title_id, fn);
}
return fsFsOpenFile(&g_sd_filesystem, path, flags, out);
}
Result Utils::OpenRomFSSdFile(u64 title_id, const char *fn, int flags, FsFile *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return OpenRomFSFile(&g_sd_filesystem, title_id, fn, flags, out);
}
Result Utils::OpenSdDir(const char *path, FsDir *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return fsFsOpenDirectory(&g_sd_filesystem, path, FS_DIROPEN_DIRECTORY | FS_DIROPEN_FILE, out);
}
Result Utils::OpenSdDirForAtmosphere(u64 title_id, const char *path, FsDir *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
char safe_path[FS_MAX_PATH];
if (*path == '/') {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx%s", title_id, path);
} else {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx/%s", title_id, path);
}
return fsFsOpenDirectory(&g_sd_filesystem, safe_path, FS_DIROPEN_DIRECTORY | FS_DIROPEN_FILE, out);
}
Result Utils::OpenRomFSSdDir(u64 title_id, const char *path, FsDir *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return OpenRomFSDir(&g_sd_filesystem, title_id, path, out);
}
Result Utils::OpenRomFSFile(FsFileSystem *fs, u64 title_id, const char *fn, int flags, FsFile *out) {
char path[FS_MAX_PATH];
if (*fn == '/') {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx/romfs%s", title_id, fn);
} else {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx/romfs/%s", title_id, fn);
}
return fsFsOpenFile(fs, path, flags, out);
}
Result Utils::OpenRomFSDir(FsFileSystem *fs, u64 title_id, const char *path, FsDir *out) {
char safe_path[FS_MAX_PATH];
if (*path == '/') {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx/romfs%s", title_id, path);
} else {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx/romfs/%s", title_id, path);
}
return fsFsOpenDirectory(fs, safe_path, FS_DIROPEN_DIRECTORY | FS_DIROPEN_FILE, out);
}
Result Utils::HasSdRomfsContent(u64 title_id, bool *out) {
Result rc;
FsDir dir;
if (R_FAILED((rc = Utils::OpenRomFSSdDir(title_id, "", &dir)))) {
return rc;
}
FsDirectoryEntry dir_entry;
u64 read_entries;
if (R_SUCCEEDED((rc = fsDirRead(&dir, 0, &read_entries, 1, &dir_entry)))) {
*out = (read_entries == 1);
}
fsDirClose(&dir);
return rc;
}
bool Utils::HasSdMitMFlag(u64 tid) {
if (IsSdInitialized()) {
return std::find(g_mitm_flagged_tids.begin(), g_mitm_flagged_tids.end(), tid) != g_mitm_flagged_tids.end();
}
return false;
}