67 lines
2.7 KiB
C++
67 lines
2.7 KiB
C++
// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <span>
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#include <cryptopp/aes.h>
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#include <cryptopp/filters.h>
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#include <cryptopp/modes.h>
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#include <cryptopp/oaep.h>
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#include <cryptopp/osrng.h>
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#include <cryptopp/rsa.h>
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#include <cryptopp/sha.h>
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#include "common/types.h"
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#include "keys.h"
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class Crypto {
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public:
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PkgDerivedKey3Keyset pkg_derived_key3_keyset;
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FakeKeyset FakeKeyset_keyset;
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DebugRifKeyset DebugRifKeyset_keyset;
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CryptoPP::RSA::PrivateKey key_pkg_derived_key3_keyset_init();
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CryptoPP::RSA::PrivateKey FakeKeyset_keyset_init();
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CryptoPP::RSA::PrivateKey DebugRifKeyset_init();
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void RSA2048Decrypt(std::span<CryptoPP::byte, 32> dk3,
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std::span<const CryptoPP::byte, 256> ciphertext,
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bool is_dk3); // RSAES_PKCS1v15_
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void ivKeyHASH256(std::span<const CryptoPP::byte, 64> cipher_input,
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std::span<CryptoPP::byte, 32> ivkey_result);
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void aesCbcCfb128Decrypt(std::span<const CryptoPP::byte, 32> ivkey,
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std::span<const CryptoPP::byte, 256> ciphertext,
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std::span<CryptoPP::byte, 256> decrypted);
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void aesCbcCfb128DecryptEntry(std::span<const CryptoPP::byte, 32> ivkey,
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std::span<CryptoPP::byte> ciphertext,
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std::span<CryptoPP::byte> decrypted);
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void decryptEFSM(std::span<CryptoPP::byte, 16>, std::span<CryptoPP::byte, 16> efsmIv,
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std::span<CryptoPP::byte> ciphertext, std::span<CryptoPP::byte> decrypted);
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void PfsGenCryptoKey(std::span<const CryptoPP::byte, 32> ekpfs,
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std::span<const CryptoPP::byte, 16> seed,
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std::span<CryptoPP::byte, 16> dataKey,
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std::span<CryptoPP::byte, 16> tweakKey);
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void decryptPFS(std::span<const CryptoPP::byte, 16> dataKey,
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std::span<const CryptoPP::byte, 16> tweakKey, std::span<const u8> src_image,
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std::span<CryptoPP::byte> dst_image, u64 sector);
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void xtsXorBlock(CryptoPP::byte* x, const CryptoPP::byte* a, const CryptoPP::byte* b) {
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for (int i = 0; i < 16; i++) {
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x[i] = a[i] ^ b[i];
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}
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}
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void xtsMult(std::span<CryptoPP::byte, 16> encryptedTweak) {
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int feedback = 0;
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for (int k = 0; k < encryptedTweak.size(); k++) {
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const auto tmp = (encryptedTweak[k] >> 7) & 1;
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encryptedTweak[k] = ((encryptedTweak[k] << 1) + feedback) & 0xFF;
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feedback = tmp;
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}
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if (feedback != 0) {
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encryptedTweak[0] ^= 0x87;
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}
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}
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};
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