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registered_cache: Process *.cnmt.nca files 

Needed to use the RegisteredCache/PlaceholderCache on gamecards.
This commit is contained in:
Zach Hilman 2019-04-10 12:24:44 -04:00
parent 8500ca797f
commit 9d9fc8a675
1 changed files with 23 additions and 16 deletions
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39
src/core/file_sys/registered_cache.cpp
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@ -48,19 +48,22 @@ static bool FollowsTwoDigitDirFormat(std::string_view name) {
static bool FollowsNcaIdFormat(std::string_view name) {
static const std::regex nca_id_regex("[0-9A-F]{32}\\.nca", std::regex_constants::ECMAScript |
std::regex_constants::icase);
return name.size() == 36 && std::regex_match(name.begin(), name.end(), nca_id_regex);
static const std::regex nca_id_cnmt_regex(
"[0-9A-F]{32}\\.cnmt.nca", std::regex_constants::ECMAScript | std::regex_constants::icase);
return (name.size() == 36 && std::regex_match(name.begin(), name.end(), nca_id_regex)) ||
(name.size() == 41 && std::regex_match(name.begin(), name.end(), nca_id_cnmt_regex));
}
static std::string GetRelativePathFromNcaID(const std::array<u8, 16>& nca_id, bool second_hex_upper,
bool within_two_digit) {
if (!within_two_digit) {
return fmt::format("/{}.nca", Common::HexToString(nca_id, second_hex_upper));
}
bool within_two_digit, bool cnmt_suffix) {
if (!within_two_digit)
return fmt::format(cnmt_suffix ? "{}.cnmt.nca" : "/{}.nca",
Common::HexArrayToString(nca_id, second_hex_upper));
Core::Crypto::SHA256Hash hash{};
mbedtls_sha256(nca_id.data(), nca_id.size(), hash.data(), 0);
return fmt::format("/000000{:02X}/{}.nca", hash[0],
Common::HexToString(nca_id, second_hex_upper));
return fmt::format(cnmt_suffix ? "/000000{:02X}/{}.cnmt.nca" : "/000000{:02X}/{}.nca", hash[0],
Common::HexArrayToString(nca_id, second_hex_upper));
}
static std::string GetCNMTName(TitleType type, u64 title_id) {
@ -319,14 +322,18 @@ VirtualFile RegisteredCache::OpenFileOrDirectoryConcat(const VirtualDir& dir,
VirtualFile RegisteredCache::GetFileAtID(NcaID id) const {
VirtualFile file;
// Try all four modes of file storage:
// (bit 1 = uppercase/lower, bit 0 = within a two-digit dir)
// 00: /000000**/{:032X}.nca
// 01: /{:032X}.nca
// 10: /000000**/{:032x}.nca
// 11: /{:032x}.nca
for (u8 i = 0; i < 4; ++i) {
const auto path = GetRelativePathFromNcaID(id, (i & 0b10) == 0, (i & 0b01) == 0);
// Try all five relevant modes of file storage:
// (bit 2 = uppercase/lower, bit 1 = within a two-digit dir, bit 0 = .cnmt suffix)
// 000: /000000**/{:032X}.nca
// 010: /{:032X}.nca
// 100: /000000**/{:032x}.nca
// 110: /{:032x}.nca
// 111: /{:032x}.cnmt.nca
for (u8 i = 0; i < 8; ++i) {
if ((i % 2) == 1 && i != 7)
continue;
const auto path =
GetRelativePathFromNcaID(id, (i & 0b100) == 0, (i & 0b010) == 0, (i & 0b001) == 0b001);
file = OpenFileOrDirectoryConcat(dir, path);
if (file != nullptr)
return file;
@ -622,7 +629,7 @@ InstallResult RegisteredCache::RawInstallNCA(const NCA& nca, const VfsCopyFuncti
memcpy(id.data(), hash.data(), 16);
}
std::string path = GetRelativePathFromNcaID(id, false, true);
std::string path = GetRelativePathFromNcaID(id, false, true, false);
if (GetFileAtID(id) != nullptr && !overwrite_if_exists) {
LOG_WARNING(Loader, "Attempting to overwrite existing NCA. Skipping...");