mirror of
https://github.com/azahar-emu/azahar
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dc1ebb63cb
- Allow downloading titles from eshop and system settings - Remove encrypted game support
70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
// Copyright 2024 Azahar Emulator Project
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// Licensed under GPLv2 or any later version
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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 <cstddef>
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#include <span>
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#include <vector>
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#include <cryptopp/oids.h>
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#include "common/common_types.h"
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#include "cryptopp/eccrypto.h"
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namespace HW::ECC {
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// All the supported 3DS ECC operations use the sect233r1 curve,
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// so we default to sizes for this curve only.
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static constexpr size_t INT_SIZE = 0x1E;
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using CryptoPPInteger = CryptoPP::Integer;
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using CryptoPPPoint = CryptoPP::EC2N::Point;
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using CryptoPPECCPrivateKey = CryptoPP::ECDSA<CryptoPP::EC2N, CryptoPP::SHA256>::PrivateKey;
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using CryptoPPECCPublicKey = CryptoPP::ECDSA<CryptoPP::EC2N, CryptoPP::SHA256>::PublicKey;
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struct PrivateKey {
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std::array<u8, INT_SIZE> x;
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CryptoPPInteger AsCryptoPPInteger() const;
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CryptoPPECCPrivateKey AsCryptoPPPrivateKey() const;
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};
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union PublicKey {
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struct {
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std::array<u8, INT_SIZE> x;
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std::array<u8, INT_SIZE> y;
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};
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std::array<u8, INT_SIZE * 2> xy;
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CryptoPPPoint AsCryptoPPPoint() const;
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CryptoPPECCPublicKey AsCryptoPPPublicKey() const;
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};
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union Signature {
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struct {
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std::array<u8, INT_SIZE> r;
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std::array<u8, INT_SIZE> s;
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};
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std::array<u8, INT_SIZE * 2> rs;
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};
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void InitSlots();
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PrivateKey CreateECCPrivateKey(std::span<const u8> private_key_x, bool fix_up = false);
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PublicKey CreateECCPublicKey(std::span<const u8> public_key_xy);
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Signature CreateECCSignature(std::span<const u8> signature_rs);
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PublicKey MakePublicKey(const CryptoPPECCPrivateKey& private_key_cpp);
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PublicKey MakePublicKey(const PrivateKey& private_key);
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std::pair<PrivateKey, PublicKey> GenerateKeyPair();
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Signature Sign(std::span<const u8> data, PrivateKey private_key);
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bool Verify(std::span<const u8> data, Signature signature, PublicKey public_key);
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std::vector<u8> Agree(PrivateKey private_key, PublicKey others_public_key);
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const PublicKey& GetRootPublicKey();
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} // namespace HW::ECC
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