48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
// Copyright 2020 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <limits>
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#include <memory>
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#include "Common/CommonTypes.h"
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#include "DiscIO/VolumeWii.h"
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namespace DiscIO
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{
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class BlobReader;
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class WiiEncryptionCache
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{
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public:
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using Key = std::array<u8, VolumeWii::AES_KEY_SIZE>;
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// The blob pointer is kept around for the lifetime of this object.
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explicit WiiEncryptionCache(BlobReader* blob);
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~WiiEncryptionCache();
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// Encrypts exactly one group.
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// If the returned pointer is nullptr, reading from the blob failed.
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// If the returned pointer is not nullptr, it is guaranteed to be valid until
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// the next call of this function or the destruction of this object.
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const std::array<u8, VolumeWii::GROUP_TOTAL_SIZE>* EncryptGroup(u64 offset,
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u64 partition_data_offset,
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u64 partition_data_decrypted_size,
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const Key& key);
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// Encrypts a variable number of groups, as determined by the offset and size parameters.
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// Supports reading groups partially.
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bool EncryptGroups(u64 offset, u64 size, u8* out_ptr, u64 partition_data_offset,
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u64 partition_data_decrypted_size, const Key& key);
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private:
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BlobReader* m_blob;
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std::unique_ptr<std::array<u8, VolumeWii::GROUP_TOTAL_SIZE>> m_cache;
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u64 m_cached_offset = std::numeric_limits<u64>::max();
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};
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} // namespace DiscIO
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