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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/assert.h"
#include "core/file_sys/vfs.h"
namespace Core::Crypto {
enum class Mode {
CTR = 11,
ECB = 2,
XTS = 70,
};
enum class Op {
Encrypt,
Decrypt,
};
struct mbedtls_cipher_context_t;
template <typename Key, size_t KeySize = sizeof(Key)>
class AESCipher {
static_assert(std::is_same_v<Key, std::array<u8, KeySize>>, "Key must be std::array of u8.");
static_assert(KeySize == 0x10 || KeySize == 0x20, "KeySize must be 128 or 256.");
public:
AESCipher(Key key, Mode mode);
~AESCipher();
void SetIV(std::vector<u8> iv);
template <typename Source, typename Dest>
void Transcode(const Source* src, size_t size, Dest* dest, Op op) {
Transcode(reinterpret_cast<const u8*>(src), size, reinterpret_cast<u8*>(dest), op);
}
void Transcode(const u8* src, size_t size, u8* dest, Op op);
template <typename Source, typename Dest>
void XTSTranscode(const Source* src, size_t size, Dest* dest, size_t sector_id,
size_t sector_size, Op op) {
XTSTranscode(reinterpret_cast<const u8*>(src), size, reinterpret_cast<u8*>(dest), sector_id, sector_size, op);
}
void XTSTranscode(const u8* src, size_t size, u8* dest, size_t sector_id, size_t sector_size, Op op);
private:
std::unique_ptr<mbedtls_cipher_context_t> encryption_context;
std::unique_ptr<mbedtls_cipher_context_t> decryption_context;
static std::vector<u8> CalculateNintendoTweak(size_t sector_id);
};
} // namespace Crypto
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