From 86f6b6b7b2d930e8203114332b04a5c49a780b06 Mon Sep 17 00:00:00 2001 From: Liam Date: Thu, 10 Aug 2023 21:34:43 -0400 Subject: vfs: expand support for NCA reading --- .../file_sys/fssystem/fssystem_aes_ctr_storage.h | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 src/core/file_sys/fssystem/fssystem_aes_ctr_storage.h (limited to 'src/core/file_sys/fssystem/fssystem_aes_ctr_storage.h') diff --git a/src/core/file_sys/fssystem/fssystem_aes_ctr_storage.h b/src/core/file_sys/fssystem/fssystem_aes_ctr_storage.h new file mode 100644 index 000000000..bceb1f9ad --- /dev/null +++ b/src/core/file_sys/fssystem/fssystem_aes_ctr_storage.h @@ -0,0 +1,43 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include + +#include "core/crypto/aes_util.h" +#include "core/crypto/key_manager.h" +#include "core/file_sys/errors.h" +#include "core/file_sys/fssystem/fs_i_storage.h" +#include "core/file_sys/vfs.h" + +namespace FileSys { + +class AesCtrStorage : public IStorage { + YUZU_NON_COPYABLE(AesCtrStorage); + YUZU_NON_MOVEABLE(AesCtrStorage); + +public: + static constexpr size_t BlockSize = 0x10; + static constexpr size_t KeySize = 0x10; + static constexpr size_t IvSize = 0x10; + +private: + VirtualFile m_base_storage; + std::array m_key; + std::array m_iv; + mutable std::optional> m_cipher; + +public: + static void MakeIv(void* dst, size_t dst_size, u64 upper, s64 offset); + +public: + AesCtrStorage(VirtualFile base, const void* key, size_t key_size, const void* iv, + size_t iv_size); + + virtual size_t Read(u8* buffer, size_t size, size_t offset) const override; + virtual size_t Write(const u8* buffer, size_t size, size_t offset) override; + virtual size_t GetSize() const override; +}; + +} // namespace FileSys -- cgit v1.2.3