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Added normal compression handling to XenonAnalyse

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The Spicy Chef 2025-03-26 13:00:52 +00:00
parent 51ae35da02
commit fda7d86aec
3 changed files with 104 additions and 27 deletions
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77
XenonUtils/xex.cpp
View file

@ -5,6 +5,8 @@
#include <vector>
#include <unordered_map>
#include <aes.hpp>
#include <TinySHA1.hpp>
#include <xex_patcher.h>
#define STRINGIFY(X) #X
#define XE_EXPORT(MODULE, ORDINAL, NAME, TYPE) { (ORDINAL), "__imp__" STRINGIFY(NAME) }
@ -135,7 +137,7 @@ Image Xex2LoadImage(const uint8_t* data, size_t dataSize)
// Decompress image
if (fileFormatInfo != nullptr)
{
assert(fileFormatInfo->compressionType <= XEX_COMPRESSION_BASIC);
assert(fileFormatInfo->compressionType <= XEX_COMPRESSION_NORMAL);
std::unique_ptr<uint8_t[]> decryptedData;
const uint8_t* srcData = nullptr;
@ -192,6 +194,79 @@ Image Xex2LoadImage(const uint8_t* data, size_t dataSize)
destData += blocks[i].zeroSize;
}
}
else if (fileFormatInfo->compressionType == XEX_COMPRESSION_NORMAL)
{
result = std::make_unique<uint8_t[]>(imageSize);
auto* destData = result.get();
const Xex2CompressedBlockInfo* blocks = &((const Xex2FileNormalCompressionInfo*)(fileFormatInfo + 1))->firstBlock;
const uint32_t headerSize = header->headerSize.get();
const uint32_t exeLength = dataSize - headerSize;
const uint8_t* exeBuffer = srcData;
uint8_t* compressBuffer = NULL;
const uint8_t* p = NULL;
uint8_t* d = NULL;
sha1::SHA1 s;
compressBuffer = (uint8_t*)calloc(1, exeLength);
p = exeBuffer;
d = compressBuffer;
int resultCode = 0;
uint8_t blockCalcedDigest[0x14];
while (blocks->blockSize) {
const uint8_t* pNext = p + blocks->blockSize;
const auto* nextBlock = (const Xex2CompressedBlockInfo*)p;
s.reset();
s.processBytes(p, blocks->blockSize);
s.finalize(blockCalcedDigest);
if (memcmp(blockCalcedDigest, blocks->blockHash, 0x14) != 0) {
resultCode = 2;
break;
}
p += 4;
p += 20;
while (true) {
const size_t chunkSize = (p[0] << 8) | p[1];
p += 2;
if (!chunkSize) {
break;
}
memcpy(d, p, chunkSize);
p += chunkSize;
d += chunkSize;
}
p = pNext;
blocks = nextBlock;
}
if (!resultCode)
{
uint32_t uncompressedSize = security->imageSize;
uint8_t* buffer = destData;
resultCode = lzxDecompress(compressBuffer, d - compressBuffer, buffer, uncompressedSize, ((const Xex2FileNormalCompressionInfo*)(fileFormatInfo + 1))->windowSize, nullptr, 0);
}
if (compressBuffer)
free((void*)compressBuffer);
if (resultCode)
{
return {};
}
}
}
image.data = std::move(result);

52
XenonUtils/xex_patcher.cpp
View file

@ -406,32 +406,32 @@ XexPatcher::Result XexPatcher::apply(const uint8_t* xexBytes, size_t xexBytesSiz
else if (fileFormatInfo->compressionType == XEX_COMPRESSION_NORMAL)
{
const Xex2CompressedBlockInfo* blocks = &((const Xex2FileNormalCompressionInfo*)(fileFormatInfo + 1))->firstBlock;
const uint32_t exe_length = xexBytesSize - xexHeader->headerSize.get();
const uint8_t* exe_buffer = &outBytes[headerTargetSize];
const uint32_t exeLength = xexBytesSize - xexHeader->headerSize.get();
const uint8_t* exeBuffer = &outBytes[headerTargetSize];
uint8_t* compress_buffer = NULL;
uint8_t* compressBuffer = NULL;
const uint8_t* p = NULL;
uint8_t* d = NULL;
sha1::SHA1 s;
compress_buffer = (uint8_t*)calloc(1, exe_length);
compressBuffer = (uint8_t*)calloc(1, exeLength);
p = exe_buffer;
d = compress_buffer;
p = exeBuffer;
d = compressBuffer;
int result_code = 0;
int resultCode = 0;
uint8_t block_calced_digest[0x14];
uint8_t blockCalcedDigest[0x14];
while (blocks->blockSize) {
const uint8_t* pnext = p + blocks->blockSize;
const auto* next_block = (const Xex2CompressedBlockInfo*)p;
const uint8_t* pNext = p + blocks->blockSize;
const auto* nextBlock = (const Xex2CompressedBlockInfo*)p;
s.reset();
s.processBytes(p, blocks->blockSize);
s.finalize(block_calced_digest);
s.finalize(blockCalcedDigest);
if (memcmp(block_calced_digest, blocks->blockHash, 0x14) != 0) {
result_code = 2;
if (memcmp(blockCalcedDigest, blocks->blockHash, 0x14) != 0) {
resultCode = 2;
break;
}
@ -439,32 +439,32 @@ XexPatcher::Result XexPatcher::apply(const uint8_t* xexBytes, size_t xexBytesSiz
p += 20;
while (true) {
const size_t chunk_size = (p[0] << 8) | p[1];
const size_t chunkSize = (p[0] << 8) | p[1];
p += 2;
if (!chunk_size) {
if (!chunkSize) {
break;
}
memcpy(d, p, chunk_size);
p += chunk_size;
d += chunk_size;
memcpy(d, p, chunkSize);
p += chunkSize;
d += chunkSize;
}
p = pnext;
blocks = next_block;
p = pNext;
blocks = nextBlock;
}
if (!result_code)
if (!resultCode)
{
uint32_t uncompressed_size = originalSecurityInfo->imageSize;
uint32_t uncompressedSize = originalSecurityInfo->imageSize;
uint8_t* buffer = outBytes.data() + newXexHeaderSize;
result_code = lzxDecompress(compress_buffer, d - compress_buffer, buffer, uncompressed_size, ((const Xex2FileNormalCompressionInfo*)(fileFormatInfo + 1))->windowSize, nullptr, 0);
resultCode = lzxDecompress(compressBuffer, d - compressBuffer, buffer, uncompressedSize, ((const Xex2FileNormalCompressionInfo*)(fileFormatInfo + 1))->windowSize, nullptr, 0);
}
if (compress_buffer)
free((void*)compress_buffer);
if (compressBuffer)
free((void*)compressBuffer);
if (result_code)
if (resultCode)
return Result::PatchFailed;
}
else if (fileFormatInfo->compressionType == XEX_COMPRESSION_DELTA)

2
XenonUtils/xex_patcher.h
View file

@ -16,6 +16,8 @@
#include <span>
#include <vector>
extern int lzxDecompress(const void* lzxData, size_t lzxLength, void* dst, size_t dstLength, uint32_t windowSize, void* windowData, size_t windowDataLength);
struct XexPatcher
{
enum class Result {