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hac2l/source/hactool_processor.xci.cpp

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/*
* 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 <exosphere/pkg1.hpp>
#include "hactool_processor.hpp"
#include "hactool_fs_utils.hpp"
namespace ams::hactool {
namespace {
constexpr size_t CardInitialDataRegionSize = 0x1000;
struct XciBodyHeader {
gc::impl::CardHeaderWithSignature card_header;
gc::impl::CardHeaderWithSignature card_header_for_sign2;
gc::impl::Ca10Certificate ca10_cert;
};
Result DetermineXciSubStorages(std::shared_ptr<fs::IStorage> *out_key_area, std::shared_ptr<fs::IStorage> *out_body, std::shared_ptr<fs::IStorage> &storage) {
/* Get the storage size. */
s64 storage_size;
R_TRY(storage->GetSize(std::addressof(storage_size)));
/* Try to read the header from after the initial data region. */
if (storage_size >= static_cast<s64>(CardInitialDataRegionSize)) {
gc::impl::CardHeaderWithSignature card_header;
R_TRY(storage->Read(CardInitialDataRegionSize, std::addressof(card_header), sizeof(card_header)));
if (card_header.data.magic == gc::impl::CardHeader::Magic) {
*out_key_area = std::make_shared<fs::SubStorage>(std::shared_ptr<fs::IStorage>(storage), 0, CardInitialDataRegionSize);
*out_body = std::make_shared<fs::SubStorage>(std::shared_ptr<fs::IStorage>(storage), CardInitialDataRegionSize, storage_size - CardInitialDataRegionSize);
R_SUCCEED();
}
}
/* Default to treating the xci as though it has no key area. */
*out_key_area = nullptr;
*out_body = std::make_shared<fs::SubStorage>(storage, 0, storage_size);
R_SUCCEED();
}
Result CreateRootPartitionFileSystem(std::shared_ptr<fs::fsa::IFileSystem> *out, std::shared_ptr<fs::IStorage> &storage, const gc::impl::CardHeaderWithSignature &header) {
/* Create meta data. */
auto meta = std::make_unique<fssystem::Sha256PartitionFileSystemMeta>();
AMS_ABORT_UNLESS(meta != nullptr);
/* Initialize meta data. */
{
util::optional<u8> salt = util::nullopt;
if (static_cast<fs::GameCardCompatibilityType>(header.data.encrypted_data.compatibility_type) != fs::GameCardCompatibilityType::Normal) {
salt.emplace(header.data.encrypted_data.compatibility_type);
}
R_TRY(meta->Initialize(storage.get(), sf::GetNewDeleteMemoryResource(), header.data.partition_fs_header_hash, sizeof(header.data.partition_fs_header_hash), salt));
}
/* Create fs. */
auto fs = std::make_shared<fssystem::Sha256PartitionFileSystem>();
R_TRY(fs->Initialize(std::move(meta), storage));
/* Set output. */
*out = std::move(fs);
R_SUCCEED();
}
Result CreatePartitionFileSystem(std::shared_ptr<fs::fsa::IFileSystem> *out, std::shared_ptr<fs::IStorage> &storage) {
/* Create meta data. */
auto meta = std::make_unique<fssystem::Sha256PartitionFileSystemMeta>();
AMS_ABORT_UNLESS(meta != nullptr);
s64 size;
R_ABORT_UNLESS(storage->GetSize(std::addressof(size)));
/* Initialize meta data. */
R_TRY(meta->Initialize(storage.get(), sf::GetNewDeleteMemoryResource()));
/* Create fs. */
auto fs = std::make_shared<fssystem::Sha256PartitionFileSystem>();
R_TRY(fs->Initialize(std::move(meta), storage));
/* Set output. */
*out = std::move(fs);
R_SUCCEED();
}
}
Result Processor::ProcessAsXci(std::shared_ptr<fs::IStorage> storage, ProcessAsXciContext *ctx) {
/* Ensure we have a context. */
ProcessAsXciContext local_ctx{};
if (ctx == nullptr) {
ctx = std::addressof(local_ctx);
}
/* Set the storage. */
ctx->storage = std::move(storage);
/* Decide on storages. */
R_TRY(DetermineXciSubStorages(std::addressof(ctx->key_area_storage), std::addressof(ctx->body_storage), ctx->storage));
/* If we have a key area, read the initial data. */
if (ctx->key_area_storage != nullptr) {
R_ABORT_UNLESS(ctx->key_area_storage->Read(0, std::addressof(ctx->card_data.initial_data), sizeof(ctx->card_data.initial_data)));
}
/* Read the header. */
XciBodyHeader body_header;
R_ABORT_UNLESS(ctx->body_storage->Read(0, std::addressof(body_header), sizeof(body_header)));
/* Make the card header. */
ctx->card_data.header = body_header.card_header;
/* Decrypt the card header. */
ctx->card_data.decrypted_header = ctx->card_data.header;
R_ABORT_UNLESS(gc::impl::GcCrypto::DecryptCardHeader(std::addressof(ctx->card_data.decrypted_header.data), sizeof(ctx->card_data.decrypted_header.data)));
/* Set up the headers for ca10 sign2. */
if (ctx->card_data.header.data.flags & fs::GameCardAttribute_HasHeaderSign2Flag) {
ctx->card_data.ca10_certificate = body_header.ca10_cert;
ctx->card_data.header_for_hash = body_header.card_header_for_sign2;
ctx->card_data.decrypted_header_for_hash = ctx->card_data.header_for_hash;
R_ABORT_UNLESS(gc::impl::GcCrypto::DecryptCardHeader(std::addressof(ctx->card_data.decrypted_header_for_hash.data), sizeof(ctx->card_data.decrypted_header_for_hash.data)));
} else {
ctx->card_data.ca10_certificate = {};
ctx->card_data.header_for_hash = ctx->card_data.header;
ctx->card_data.decrypted_header_for_hash = ctx->card_data.decrypted_header;
}
/* Read the T1 cert. */
R_ABORT_UNLESS(ctx->body_storage->Read(0x7000, std::addressof(ctx->card_data.t1_certificate), sizeof(ctx->card_data.t1_certificate)));
/* Parse the root partition. */
{
/* Create the root partition storage. */
using AlignmentMatchingStorageForGameCard = fssystem::AlignmentMatchingStorageInBulkRead<1>;
auto aligned_storage = std::make_shared<AlignmentMatchingStorageForGameCard>(ctx->body_storage, 0x200);
/* Get the size of the body. */
s64 body_size;
R_ABORT_UNLESS(aligned_storage->GetSize(std::addressof(body_size)));
/* Create sub storage for the root partition. */
ctx->root_partition.storage = std::make_shared<fs::SubStorage>(std::move(aligned_storage), ctx->card_data.header.data.partition_fs_header_address, body_size - ctx->card_data.header.data.partition_fs_header_address);
/* Create filesystem for the root partition. */
if (const auto res = CreateRootPartitionFileSystem(std::addressof(ctx->root_partition.fs), ctx->root_partition.storage, ctx->card_data.decrypted_header); R_FAILED(res)) {
fprintf(stderr, "[Warning]: Failed to mount the game card root partition: 2%03d-%04d\n", res.GetModule(), res.GetDescription());
}
}
/* Parse all other partitions. */
if (ctx->root_partition.fs != nullptr) {
const auto iter_result = fssystem::IterateDirectoryRecursively(ctx->root_partition.fs.get(),
fs::MakeConstantPath("/"),
[&] (const fs::Path &, const fs::DirectoryEntry &) -> Result {
R_SUCCEED();
},
[&] (const fs::Path &, const fs::DirectoryEntry &) -> Result {
R_SUCCEED();
},
[&] (const fs::Path &path, const fs::DirectoryEntry &) -> Result {
ProcessAsXciContext::PartitionData *target_partition = nullptr;
if (std::strcmp(path.GetString(), "/update") == 0) {
target_partition = std::addressof(ctx->update_partition);
} else if (std::strcmp(path.GetString(), "/logo") == 0) {
target_partition = std::addressof(ctx->logo_partition);
} else if (std::strcmp(path.GetString(), "/normal") == 0) {
target_partition = std::addressof(ctx->normal_partition);
} else if (std::strcmp(path.GetString(), "/secure") == 0) {
target_partition = std::addressof(ctx->secure_partition);
} else {
fprintf(stderr, "[Warning]: Found unrecognized game card partition (%s)\n", path.GetString());
}
if (target_partition != nullptr) {
if (const auto res = OpenFileStorage(std::addressof(target_partition->storage), ctx->root_partition.fs, path.GetString()); R_SUCCEEDED(res)) {
if (const auto res = CreatePartitionFileSystem(std::addressof(target_partition->fs), target_partition->storage); R_FAILED(res)) {
fprintf(stderr, "[Warning]: Failed to mount game card partition (%s): 2%03d-%04d\n", path.GetString(), res.GetModule(), res.GetDescription());
}
} else {
fprintf(stderr, "[Warning]: Failed to open game card partition (%s): 2%03d-%04d\n", path.GetString(), res.GetModule(), res.GetDescription());
}
}
R_SUCCEED();
}
);
if (R_FAILED(iter_result)) {
fprintf(stderr, "[Warning]: Iterating the root partition failed: 2%03d-%04d\n", iter_result.GetModule(), iter_result.GetDescription());
}
}
/* TODO: Recursive processing? */
/* Print. */
if (ctx == std::addressof(local_ctx)) {
this->PrintAsXci(*ctx);
}
/* Save. */
if (ctx == std::addressof(local_ctx)) {
this->SaveAsXci(*ctx);
}
R_SUCCEED();
}
void Processor::PrintAsXci(ProcessAsXciContext &ctx) {
auto _ = this->PrintHeader("XCI");
/* TODO: Print correct data instead of the secure partition's contents. */
if (ctx.secure_partition.fs != nullptr) {
PrintDirectory(ctx.secure_partition.fs, "secure:", "/");
}
/* TODO: Non-debug prints. */
if (ctx.key_area_storage != nullptr) {
this->PrintBytes("Initial Data", std::addressof(ctx.card_data.initial_data), sizeof(ctx.card_data.initial_data));
}
this->PrintBytes("Encrypted Header", std::addressof(ctx.card_data.header), sizeof(ctx.card_data.header));
this->PrintBytes("Decrypted Header", std::addressof(ctx.card_data.decrypted_header), sizeof(ctx.card_data.decrypted_header));
this->PrintBytes("Encrypted Header For Hash", std::addressof(ctx.card_data.header_for_hash), sizeof(ctx.card_data.header_for_hash));
this->PrintBytes("Decrypted Header For Hash", std::addressof(ctx.card_data.decrypted_header_for_hash), sizeof(ctx.card_data.decrypted_header_for_hash));
this->PrintBytes("T1 Card Cert", std::addressof(ctx.card_data.t1_certificate), sizeof(ctx.card_data.t1_certificate));
this->PrintBytes("CA10 Cert", std::addressof(ctx.card_data.ca10_certificate), sizeof(ctx.card_data.ca10_certificate));
AMS_UNUSED(ctx);
}
void Processor::SaveAsXci(ProcessAsXciContext &ctx) {
/* TODO */
AMS_UNUSED(ctx);
}
}
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