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Improve integrity check validation code

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MaranBr 2025-09-08 14:06:05 -04:00 • committed by crueter
parent 9d2681ecc9
commit fc6ada7e78
1 changed files with 14 additions and 29 deletions
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37
src/core/file_sys/fssystem/fssystem_integrity_verification_storage.cpp
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@ -4,8 +4,8 @@
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later // SPDX-License-Identifier: GPL-2.0-or-later
#include "core/file_sys/fssystem/fssystem_integrity_verification_storage.h"
#include "common/alignment.h" #include "common/alignment.h"
#include "core/file_sys/fssystem/fssystem_integrity_verification_storage.h"
namespace FileSys { namespace FileSys {
@ -15,19 +15,17 @@ constexpr inline u32 ILog2(u32 val)
return static_cast<u32>((sizeof(u32) * 8) - 1 - std::countl_zero<u32>(val)); return static_cast<u32>((sizeof(u32) * 8) - 1 - std::countl_zero<u32>(val));
} }
void IntegrityVerificationStorage::Initialize(VirtualFile hs, void IntegrityVerificationStorage::Initialize(VirtualFile hs, VirtualFile ds, s64 verif_block_size,
VirtualFile ds, s64 upper_layer_verif_block_size, bool is_real_data) {
s64 verif_block_size,
s64 upper_layer_verif_block_size,
bool is_real_data)
{
// Validate preconditions.
ASSERT(verif_block_size >= HashSize);
// Set storages. // Set storages.
m_hash_storage = hs; m_hash_storage = hs;
m_data_storage = ds; m_data_storage = ds;
// Validate preconditions.
ASSERT(verif_block_size >= HashSize);
ASSERT(m_data_storage != null);
// Set verification block sizes. // Set verification block sizes.
m_verification_block_size = verif_block_size; m_verification_block_size = verif_block_size;
m_verification_block_order = ILog2(static_cast<u32>(verif_block_size)); m_verification_block_order = ILog2(static_cast<u32>(verif_block_size));
@ -40,28 +38,20 @@ void IntegrityVerificationStorage::Initialize(VirtualFile hs,
ASSERT(m_upper_layer_verification_block_size == 1ll << m_upper_layer_verification_block_order); ASSERT(m_upper_layer_verification_block_size == 1ll << m_upper_layer_verification_block_order);
// Validate sizes. // Validate sizes.
if (m_data_storage != nullptr) {
s64 hash_size = m_hash_storage->GetSize(); s64 hash_size = m_hash_storage->GetSize();
s64 data_size = m_data_storage->GetSize(); s64 data_size = m_data_storage->GetSize();
ASSERT(((hash_size / HashSize) * m_verification_block_size) >= data_size); ASSERT(((hash_size / HashSize) * m_verification_block_size) >= data_size);
} else {
LOG_ERROR(Loader,
"Failed to initialize integrity verification store. Game, update, or DLC may not "
"work.");
}
// Set data. // Set data.
m_is_real_data = is_real_data; m_is_real_data = is_real_data;
} }
void IntegrityVerificationStorage::Finalize() void IntegrityVerificationStorage::Finalize() {
{
m_hash_storage = VirtualFile(); m_hash_storage = VirtualFile();
m_data_storage = VirtualFile(); m_data_storage = VirtualFile();
} }
size_t IntegrityVerificationStorage::Read(u8* buffer, size_t size, size_t offset) const size_t IntegrityVerificationStorage::Read(u8* buffer, size_t size, size_t offset) const {
{
// Succeed if zero size. // Succeed if zero size.
if (size == 0) { if (size == 0) {
return size; return size;
@ -69,14 +59,9 @@ size_t IntegrityVerificationStorage::Read(u8* buffer, size_t size, size_t offset
// Validate arguments. // Validate arguments.
ASSERT(buffer != nullptr); ASSERT(buffer != nullptr);
ASSERT(m_data_storage != nullptr);
if (m_data_storage == nullptr) { // Validate the offset.
LOG_ERROR(Loader,
"Integrity verification store failed read operation. Game, update or DLC may not "
"work.");
return 0;
}
s64 data_size = m_data_storage->GetSize(); s64 data_size = m_data_storage->GetSize();
ASSERT(offset <= static_cast<size_t>(data_size)); ASSERT(offset <= static_cast<size_t>(data_size));