mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-20 17:32:13 +00:00
291 lines
12 KiB
C++
291 lines
12 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <stratosphere.hpp>
|
|
#include "ncm_fs_utils.hpp"
|
|
|
|
namespace ams::ncm {
|
|
|
|
namespace {
|
|
|
|
Result MountContentMetaByRemoteFileSystemProxy(const char *mount_name, const char *path, fs::ContentAttributes attr) {
|
|
R_RETURN(fs::MountContent(mount_name, path, attr, fs::ContentType_Meta));
|
|
}
|
|
|
|
constinit MountContentMetaFunction g_mount_content_meta_func = MountContentMetaByRemoteFileSystemProxy;
|
|
|
|
}
|
|
|
|
namespace impl {
|
|
|
|
Result MountContentMetaImpl(const char *mount_name, const char *path, fs::ContentAttributes attr) {
|
|
R_RETURN(g_mount_content_meta_func(mount_name, path, attr));
|
|
}
|
|
|
|
}
|
|
|
|
bool IsContentMetaFileName(const char *name) {
|
|
return impl::PathView(name).HasSuffix(".cnmt");
|
|
}
|
|
|
|
Result ReadContentMetaPathAlongWithExtendedDataAndDigest(AutoBuffer *out, const char *path, fs::ContentAttributes attr) {
|
|
/* Mount the content. */
|
|
auto mount_name = impl::CreateUniqueMountName();
|
|
R_TRY(impl::MountContentMetaImpl(mount_name.str, path, attr));
|
|
ON_SCOPE_EXIT { fs::Unmount(mount_name.str); };
|
|
|
|
/* Open the root directory. */
|
|
auto root_path = impl::GetRootDirectoryPath(mount_name);
|
|
fs::DirectoryHandle dir;
|
|
R_TRY(fs::OpenDirectory(std::addressof(dir), root_path.str, fs::OpenDirectoryMode_File));
|
|
ON_SCOPE_EXIT { fs::CloseDirectory(dir); };
|
|
|
|
/* Loop directory reading until we find the entry we're looking for. */
|
|
while (true) {
|
|
/* Read one entry, and finish when we fail to read. */
|
|
fs::DirectoryEntry entry;
|
|
s64 num_read;
|
|
R_TRY(fs::ReadDirectory(std::addressof(num_read), std::addressof(entry), dir, 1));
|
|
if (num_read == 0) {
|
|
break;
|
|
}
|
|
|
|
/* If this is the content meta file, parse it. */
|
|
if (IsContentMetaFileName(entry.name)) {
|
|
/* Create the file path. */
|
|
impl::FilePathString file_path(root_path.str);
|
|
file_path.Append(entry.name);
|
|
|
|
/* Open the content meta file. */
|
|
fs::FileHandle file;
|
|
R_TRY(fs::OpenFile(std::addressof(file), file_path, fs::OpenMode_Read));
|
|
ON_SCOPE_EXIT { fs::CloseFile(file); };
|
|
|
|
/* Get the meta size. */
|
|
s64 file_size;
|
|
R_TRY(fs::GetFileSize(std::addressof(file_size), file));
|
|
const size_t meta_size = static_cast<size_t>(file_size);
|
|
|
|
/* Create a buffer for the meta. */
|
|
R_TRY(out->Initialize(meta_size));
|
|
|
|
/* Read the meta into the buffer. */
|
|
R_RETURN(fs::ReadFile(file, 0, out->Get(), meta_size));
|
|
}
|
|
}
|
|
|
|
R_THROW(ncm::ResultContentMetaNotFound());
|
|
}
|
|
|
|
Result ReadContentMetaPathAlongWithExtendedDataAndDigestSuppressingFsAbort(AutoBuffer *out, const char *path, fs::ContentAttributes attr) {
|
|
fs::ScopedAutoAbortDisabler aad;
|
|
R_RETURN(ReadContentMetaPathAlongWithExtendedDataAndDigest(out, path, attr));
|
|
}
|
|
|
|
Result ReadContentMetaPathWithoutExtendedDataOrDigest(AutoBuffer *out, const char *path, fs::ContentAttributes attr) {
|
|
/* Mount the content. */
|
|
auto mount_name = impl::CreateUniqueMountName();
|
|
R_TRY(impl::MountContentMetaImpl(mount_name.str, path, attr));
|
|
ON_SCOPE_EXIT { fs::Unmount(mount_name.str); };
|
|
|
|
/* Open the root directory. */
|
|
auto root_path = impl::GetRootDirectoryPath(mount_name);
|
|
fs::DirectoryHandle dir;
|
|
R_TRY(fs::OpenDirectory(std::addressof(dir), root_path.str, fs::OpenDirectoryMode_File));
|
|
ON_SCOPE_EXIT { fs::CloseDirectory(dir); };
|
|
|
|
/* Loop directory reading until we find the entry we're looking for. */
|
|
while (true) {
|
|
/* Read one entry, and finish when we fail to read. */
|
|
fs::DirectoryEntry entry;
|
|
s64 num_read;
|
|
R_TRY(fs::ReadDirectory(std::addressof(num_read), std::addressof(entry), dir, 1));
|
|
if (num_read == 0) {
|
|
break;
|
|
}
|
|
|
|
/* If this is the content meta file, parse it. */
|
|
if (IsContentMetaFileName(entry.name)) {
|
|
/* Create the file path. */
|
|
impl::FilePathString file_path(root_path.str);
|
|
file_path.Append(entry.name);
|
|
|
|
/* Open the content meta file. */
|
|
fs::FileHandle file;
|
|
R_TRY(fs::OpenFile(std::addressof(file), file_path, fs::OpenMode_Read));
|
|
ON_SCOPE_EXIT { fs::CloseFile(file); };
|
|
|
|
/* Get the meta size. */
|
|
s64 file_size;
|
|
R_TRY(fs::GetFileSize(std::addressof(file_size), file));
|
|
const size_t meta_file_size = static_cast<size_t>(file_size);
|
|
|
|
/* Check that the meta size is large enough. */
|
|
R_UNLESS(meta_file_size >= sizeof(PackagedContentMetaHeader), ncm::ResultInvalidContentMetaFileSize());
|
|
|
|
/* Read the header. */
|
|
PackagedContentMetaHeader header;
|
|
size_t read_size = 0;
|
|
R_TRY(fs::ReadFile(std::addressof(read_size), file, 0, std::addressof(header), sizeof(header)));
|
|
|
|
/* Check the right size was read. */
|
|
R_UNLESS(read_size == sizeof(PackagedContentMetaHeader), ncm::ResultInvalidContentMetaFileSize());
|
|
|
|
/* Determine the meta size. */
|
|
const size_t meta_size = PackagedContentMetaReader(std::addressof(header), sizeof(header)).GetExtendedDataOffset();
|
|
|
|
/* Create a buffer for the meta. */
|
|
R_TRY(out->Initialize(meta_size));
|
|
|
|
/* Read the meta into the buffer. */
|
|
R_RETURN(fs::ReadFile(file, 0, out->Get(), meta_size));
|
|
}
|
|
}
|
|
|
|
R_THROW(ncm::ResultContentMetaNotFound());
|
|
}
|
|
|
|
Result ReadContentMetaPathWithoutExtendedDataOrDigestSuppressingFsAbort(AutoBuffer *out, const char *path, fs::ContentAttributes attr) {
|
|
fs::ScopedAutoAbortDisabler aad;
|
|
R_RETURN(ReadContentMetaPathAlongWithExtendedDataAndDigest(out, path, attr));
|
|
}
|
|
|
|
Result TryReadContentMetaPath(fs::ContentAttributes *out_attr, AutoBuffer *out, const char *path, ReadContentMetaPathFunction func) {
|
|
/* Try with attributes = none. */
|
|
fs::ContentAttributes attr = fs::ContentAttributes_None;
|
|
R_TRY_CATCH(func(out, path, attr)) {
|
|
R_CATCH(fs::ResultNcaHeaderSignature1VerificationFailed) {
|
|
/* On signature failure, try with attributes = all. */
|
|
attr = fs::ContentAttributes_All;
|
|
R_TRY(func(out, path, attr));
|
|
}
|
|
} R_END_TRY_CATCH;
|
|
|
|
/* Set output attributes. */
|
|
*out_attr = attr;
|
|
R_SUCCEED();
|
|
}
|
|
|
|
Result TryReadContentMetaPath(AutoBuffer *out, const char *path, ReadContentMetaPathFunction func) {
|
|
/* Try with attributes = none. */
|
|
fs::ContentAttributes attr = fs::ContentAttributes_None;
|
|
R_TRY_CATCH(func(out, path, attr)) {
|
|
R_CATCH(fs::ResultNcaHeaderSignature1VerificationFailed) {
|
|
/* On signature failure, try with attributes = all. */
|
|
attr = fs::ContentAttributes_All;
|
|
R_TRY(func(out, path, attr));
|
|
}
|
|
} R_END_TRY_CATCH;
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
Result ReadVariationContentMetaInfoList(s32 *out_count, std::unique_ptr<ContentMetaInfo[]> *out_meta_infos, const Path &path, fs::ContentAttributes attr, FirmwareVariationId firmware_variation_id) {
|
|
AutoBuffer meta;
|
|
R_TRY(ReadContentMetaPathAlongWithExtendedDataAndDigestSuppressingFsAbort(std::addressof(meta), path.str, attr));
|
|
|
|
/* Create a reader for the content meta. */
|
|
PackagedContentMetaReader reader(meta.Get(), meta.GetSize());
|
|
|
|
/* Define a helper to output the base meta infos. */
|
|
const auto ReadMetaInfoListFromBase = [&] () ALWAYS_INLINE_LAMBDA -> Result {
|
|
/* Output the base content meta info count. */
|
|
*out_count = reader.GetContentMetaCount();
|
|
|
|
/* Create a buffer to hold the infos. NOTE: N does not check for nullptr before accessing. */
|
|
std::unique_ptr<ContentMetaInfo[]> buffer(new (std::nothrow) ContentMetaInfo[reader.GetContentMetaCount()]);
|
|
AMS_ABORT_UNLESS(buffer != nullptr);
|
|
|
|
/* Copy all base meta infos to output */
|
|
for (size_t i = 0; i < reader.GetContentMetaCount(); i++) {
|
|
buffer[i] = *reader.GetContentMetaInfo(i);
|
|
}
|
|
|
|
/* Write out the buffer we've populated. */
|
|
*out_meta_infos = std::move(buffer);
|
|
R_SUCCEED();
|
|
};
|
|
|
|
/* If there are no firmware variations to list, read meta infos from base. */
|
|
R_UNLESS(reader.GetExtendedDataSize() != 0, ReadMetaInfoListFromBase());
|
|
|
|
SystemUpdateMetaExtendedDataReader extended_data_reader(reader.GetExtendedData(), reader.GetExtendedDataSize());
|
|
util::optional<s32> firmware_variation_index = util::nullopt;
|
|
|
|
/* NOTE: Atmosphere extension to support downgrading. */
|
|
/* If all firmware variations refer to base, don't require the current variation be present. */
|
|
bool force_refer_to_base = true;
|
|
|
|
/* Find the input firmware variation id. */
|
|
for (size_t i = 0; i < extended_data_reader.GetFirmwareVariationCount(); i++) {
|
|
if (*extended_data_reader.GetFirmwareVariationId(i) == firmware_variation_id) {
|
|
firmware_variation_index = i;
|
|
break;
|
|
} else {
|
|
/* Check if the current variation refers to base. */
|
|
const FirmwareVariationInfo *cur_variation_info = extended_data_reader.GetFirmwareVariationInfo(i);
|
|
const bool cur_refers_to_base = extended_data_reader.GetHeader()->version == 1 || cur_variation_info->refer_to_base;
|
|
|
|
/* We force referral to base on unsupported variation only if all supported variations refer to base. */
|
|
force_refer_to_base &= cur_refers_to_base;
|
|
}
|
|
}
|
|
|
|
/* We couldn't find the input firmware variation id. */
|
|
if (!firmware_variation_index) {
|
|
/* Unless we can force a referral to base, the firmware isn't supported. */
|
|
R_UNLESS(force_refer_to_base, ncm::ResultInvalidFirmwareVariation());
|
|
|
|
/* Force a referral to base. */
|
|
R_RETURN(ReadMetaInfoListFromBase());
|
|
}
|
|
|
|
/* Obtain the variation info. */
|
|
const FirmwareVariationInfo *variation_info = extended_data_reader.GetFirmwareVariationInfo(*firmware_variation_index);
|
|
|
|
/* Refer to base if variation info says we should, or if version is 1. */
|
|
const bool refer_to_base = extended_data_reader.GetHeader()->version == 1 || variation_info->refer_to_base;
|
|
R_UNLESS(!refer_to_base, ReadMetaInfoListFromBase());
|
|
|
|
/* Output the content meta count. */
|
|
const u32 content_meta_count = variation_info->content_meta_count;
|
|
*out_count = content_meta_count;
|
|
|
|
/* We're done if there are no content metas to list. */
|
|
R_SUCCEED_IF(content_meta_count == 0);
|
|
|
|
/* Allocate a buffer for the content meta infos. */
|
|
std::unique_ptr<ContentMetaInfo[]> buffer(new (std::nothrow) ContentMetaInfo[content_meta_count]);
|
|
AMS_ABORT_UNLESS(buffer != nullptr);
|
|
|
|
/* Get the content meta infos. */
|
|
Span<const ContentMetaInfo> meta_infos;
|
|
extended_data_reader.GetContentMetaInfoList(std::addressof(meta_infos), content_meta_count);
|
|
|
|
/* Copy the meta infos to the buffer. */
|
|
for (size_t i = 0; i < content_meta_count; i++) {
|
|
buffer[i] = meta_infos[i];
|
|
}
|
|
|
|
/* Output the content meta info buffer. */
|
|
*out_meta_infos = std::move(buffer);
|
|
R_SUCCEED();
|
|
}
|
|
|
|
void SetMountContentMetaFunction(MountContentMetaFunction func) {
|
|
g_mount_content_meta_func = func;
|
|
}
|
|
|
|
}
|