b01b94d843
* FileSys::Ticket::Load: Return error if signature type does not match * fixup! FileSys::Ticket::Load: Return error if signature type does not match
60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
// Copyright 2018 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#include <algorithm>
|
|
#include <cryptopp/aes.h>
|
|
#include <cryptopp/modes.h>
|
|
#include "common/alignment.h"
|
|
#include "core/file_sys/cia_common.h"
|
|
#include "core/file_sys/ticket.h"
|
|
#include "core/hw/aes/key.h"
|
|
#include "core/loader/loader.h"
|
|
|
|
namespace FileSys {
|
|
|
|
Loader::ResultStatus Ticket::Load(const std::vector<u8> file_data, std::size_t offset) {
|
|
std::size_t total_size = static_cast<std::size_t>(file_data.size() - offset);
|
|
if (total_size < sizeof(u32))
|
|
return Loader::ResultStatus::Error;
|
|
|
|
std::memcpy(&signature_type, &file_data[offset], sizeof(u32));
|
|
|
|
// Signature lengths are variable, and the body follows the signature
|
|
u32 signature_size = GetSignatureSize(signature_type);
|
|
if (signature_size == 0) {
|
|
return Loader::ResultStatus::Error;
|
|
}
|
|
|
|
// The ticket body start position is rounded to the nearest 0x40 after the signature
|
|
std::size_t body_start = Common::AlignUp(signature_size + sizeof(u32), 0x40);
|
|
std::size_t body_end = body_start + sizeof(Body);
|
|
|
|
if (total_size < body_end)
|
|
return Loader::ResultStatus::Error;
|
|
|
|
// Read signature + ticket body
|
|
ticket_signature.resize(signature_size);
|
|
memcpy(ticket_signature.data(), &file_data[offset + sizeof(u32)], signature_size);
|
|
memcpy(&ticket_body, &file_data[offset + body_start], sizeof(Body));
|
|
|
|
return Loader::ResultStatus::Success;
|
|
}
|
|
|
|
std::optional<std::array<u8, 16>> Ticket::GetTitleKey() const {
|
|
HW::AES::InitKeys();
|
|
std::array<u8, 16> ctr{};
|
|
std::memcpy(ctr.data(), &ticket_body.title_id, sizeof(u64));
|
|
HW::AES::SelectCommonKeyIndex(ticket_body.common_key_index);
|
|
if (!HW::AES::IsNormalKeyAvailable(HW::AES::KeySlotID::TicketCommonKey)) {
|
|
return {};
|
|
}
|
|
auto key = HW::AES::GetNormalKey(HW::AES::KeySlotID::TicketCommonKey);
|
|
auto title_key = ticket_body.title_key;
|
|
CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption{key.data(), key.size(), ctr.data()}.ProcessData(
|
|
title_key.data(), title_key.data(), title_key.size());
|
|
return title_key;
|
|
}
|
|
|
|
} // namespace FileSys
|