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wheremyfoodat 2023-07-06 16:24:23 +03:00
parent 187feb5772
commit ef0ef45e94
1 changed files with 57 additions and 56 deletions
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113
src/core/loader/ncsd.cpp
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@ -1,6 +1,8 @@
#include "loader/ncsd.hpp"
#include <cstring>
#include <optional>
#include "loader/ncsd.hpp"
#include "memory.hpp"
bool Memory::mapCXI(NCSD& ncsd, NCCH& cxi) {
@ -53,78 +55,77 @@ bool Memory::mapCXI(NCSD& ncsd, NCCH& cxi) {
loadedCXI = cxi;
}
std::optional<NCSD> Memory::loadNCSD(Crypto::AESEngine &aesEngine, const std::filesystem::path& path) {
NCSD ncsd;
if (!ncsd.file.open(path, "rb"))
return std::nullopt;
std::optional<NCSD> Memory::loadNCSD(Crypto::AESEngine& aesEngine, const std::filesystem::path& path) {
NCSD ncsd;
if (!ncsd.file.open(path, "rb")) return std::nullopt;
u8 magic[4]; // Must be "NCSD"
ncsd.file.seek(0x100);
auto [success, bytes] = ncsd.file.readBytes(magic, 4);
u8 magic[4]; // Must be "NCSD"
ncsd.file.seek(0x100);
auto [success, bytes] = ncsd.file.readBytes(magic, 4);
if (!success || bytes != 4) {
printf("Failed to read NCSD magic\n");
return std::nullopt;
}
if (!success || bytes != 4) {
printf("Failed to read NCSD magic\n");
return std::nullopt;
}
if (magic[0] != 'N' || magic[1] != 'C' || magic[2] != 'S' || magic[3] != 'D') {
printf("NCSD with wrong magic value\n");
return std::nullopt;
}
if (magic[0] != 'N' || magic[1] != 'C' || magic[2] != 'S' || magic[3] != 'D') {
printf("NCSD with wrong magic value\n");
return std::nullopt;
}
std::tie(success, bytes) = ncsd.file.readBytes(&ncsd.size, 4);
if (!success || bytes != 4) {
printf("Failed to read NCSD size\n");
return std::nullopt;
}
std::tie(success, bytes) = ncsd.file.readBytes(&ncsd.size, 4);
if (!success || bytes != 4) {
printf("Failed to read NCSD size\n");
return std::nullopt;
}
ncsd.size *= NCSD::mediaUnit; // Convert size to bytes
ncsd.size *= NCSD::mediaUnit; // Convert size to bytes
// Read partition data
ncsd.file.seek(0x120);
// 2 u32s per partition (offset and length), 8 partitions total
constexpr size_t partitionDataSize = 8 * 2; // Size of partition in u32s
u32 partitionData[8 * 2];
std::tie(success, bytes) = ncsd.file.read(partitionData, partitionDataSize, sizeof(u32));
if (!success || bytes != partitionDataSize) {
printf("Failed to read NCSD partition data\n");
return std::nullopt;
}
// Read partition data
ncsd.file.seek(0x120);
// 2 u32s per partition (offset and length), 8 partitions total
constexpr size_t partitionDataSize = 8 * 2; // Size of partition in u32s
u32 partitionData[8 * 2];
std::tie(success, bytes) = ncsd.file.read(partitionData, partitionDataSize, sizeof(u32));
if (!success || bytes != partitionDataSize) {
printf("Failed to read NCSD partition data\n");
return std::nullopt;
}
for (int i = 0; i < 8; i++) {
auto& partition = ncsd.partitions[i];
NCCH& ncch = partition.ncch;
partition.offset = u64(partitionData[i * 2]) * NCSD::mediaUnit;
partition.length = u64(partitionData[i * 2 + 1]) * NCSD::mediaUnit;
for (int i = 0; i < 8; i++) {
auto& partition = ncsd.partitions[i];
NCCH& ncch = partition.ncch;
partition.offset = u64(partitionData[i * 2]) * NCSD::mediaUnit;
partition.length = u64(partitionData[i * 2 + 1]) * NCSD::mediaUnit;
ncch.partitionIndex = i;
ncch.fileOffset = partition.offset;
ncch.partitionIndex = i;
ncch.fileOffset = partition.offset;
if (partition.length != 0) { // Initialize the NCCH of each partition
NCCH::FSInfo ncchFsInfo;
if (partition.length != 0) { // Initialize the NCCH of each partition
NCCH::FSInfo ncchFsInfo;
ncchFsInfo.offset = partition.offset;
ncchFsInfo.size = partition.length;
ncchFsInfo.offset = partition.offset;
ncchFsInfo.size = partition.length;
if (!ncch.loadFromHeader(aesEngine, ncsd.file, ncchFsInfo)) {
printf("Invalid NCCH partition\n");
return std::nullopt;
}
}
}
auto& cxi = ncsd.partitions[0].ncch;
if (!cxi.hasExtendedHeader() || !cxi.hasCode()) {
printf("NCSD with an invalid CXI in partition 0?\n");
return std::nullopt;
}
if (!ncch.loadFromHeader(aesEngine, ncsd.file, ncchFsInfo)) {
printf("Invalid NCCH partition\n");
return std::nullopt;
}
}
}
auto& cxi = ncsd.partitions[0].ncch;
if (!cxi.hasExtendedHeader() || !cxi.hasCode()) {
printf("NCSD with an invalid CXI in partition 0?\n");
return std::nullopt;
}
if (!mapCXI(ncsd, cxi)) {
printf("Failed to map CXI\n");
return std::nullopt;
}
return ncsd;
return ncsd;
}
// We are lazy so we take CXI files, easily "convert" them to NCSD internally, then use our existing NCSD infrastructure