mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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198 lines
10 KiB
C++
198 lines
10 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "updater_bis_management.hpp"
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namespace ams::updater {
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namespace {
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/* Recognize special public key (https://gist.github.com/SciresM/16b63ac1d80494522bdba2c57995257c). */
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/* P = 19 */
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/* Q = 1696986749729493925354392349339746171297507422986462747526968361144447230710192316397327889522451749459854070558277878297255552508603806832852079596337539247651161831569525505882103311631577368514276343192042634740927726070847704397913856975832811679847928433261678072951551065705680482548543833651752439700272736498378724153330763357721354498194000536297732323628263256733931353143625854828275237159155585342783077681713929284136658773985266864804093157854331138230313706015557050002740810464618031715670281442110238274404626065924786185264268216336867948322976979393032640085259926883014490947373494538254895109731 */
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/* N = 0xFF696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696959 */
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/* E = 0x10001 */
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/* D = 6512128715229088976470211610075969347035078304643231077895577077900787352712063823560162578441773733649014439616165727455431015055675770987914713980812453585413988983206576233689754710500864883529402371292948326392791238474661859182717295176679567362482790015587820446999760239570255254879359445627372805817473978644067558931078225451477635089763009580492462097185005355990612929951162366081631888011031830742459571000203341001926135389508196521518687349554188686396554248868403128728646457247197407637887195043486221295751496667162366700477934591694110831002874992896076061627516220934290742867397720103040314639313 */
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constexpr const u8 CustomPublicKey[0x100] = {
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0x59, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69,
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0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0x69, 0xFF,
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};
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}
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Result BisAccessor::Initialize() {
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R_RETURN(fs::OpenBisPartition(std::addressof(m_storage), m_partition_id));
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}
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void BisAccessor::Finalize() {
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/* ... */
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}
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Result BisAccessor::Read(void *dst, size_t size, u64 offset) {
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AMS_ABORT_UNLESS((offset % SectorAlignment) == 0);
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R_RETURN(m_storage->Read(static_cast<u32>(offset), dst, size));
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}
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Result BisAccessor::Write(u64 offset, const void *src, size_t size) {
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AMS_ABORT_UNLESS((offset % SectorAlignment) == 0);
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R_RETURN(m_storage->Write(static_cast<u32>(offset), src, size));
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}
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Result BisAccessor::Write(u64 offset, size_t size, const char *bip_path, void *work_buffer, size_t work_buffer_size) {
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AMS_ABORT_UNLESS((offset % SectorAlignment) == 0);
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AMS_ABORT_UNLESS((work_buffer_size % SectorAlignment) == 0);
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fs::FileHandle file;
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R_TRY_CATCH(fs::OpenFile(std::addressof(file), bip_path, fs::OpenMode_Read)) {
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R_CONVERT(fs::ResultPathNotFound, updater::ResultInvalidBootImagePackage())
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} R_END_TRY_CATCH;
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ON_SCOPE_EXIT { fs::CloseFile(file); };
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size_t written = 0;
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while (true) {
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std::memset(work_buffer, 0, work_buffer_size);
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size_t read_size;
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R_TRY(fs::ReadFile(std::addressof(read_size), file, written, work_buffer, work_buffer_size, fs::ReadOption()));
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AMS_ABORT_UNLESS(written + read_size <= size);
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size_t aligned_size = ((read_size + SectorAlignment - 1) / SectorAlignment) * SectorAlignment;
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R_TRY(this->Write(offset + written, work_buffer, aligned_size));
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written += read_size;
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if (read_size != work_buffer_size) {
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break;
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}
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}
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R_SUCCEED();
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}
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Result BisAccessor::Clear(u64 offset, u64 size, void *work_buffer, size_t work_buffer_size) {
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AMS_ABORT_UNLESS((offset % SectorAlignment) == 0);
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AMS_ABORT_UNLESS((work_buffer_size % SectorAlignment) == 0);
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std::memset(work_buffer, 0, work_buffer_size);
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size_t written = 0;
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while (written < size) {
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size_t cur_write_size = std::min<size_t>(work_buffer_size, size - written);
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R_TRY(this->Write(offset + written, work_buffer, cur_write_size));
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written += cur_write_size;
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}
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R_SUCCEED();
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}
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Result BisAccessor::GetHash(void *dst, u64 offset, u64 size, u64 hash_size, void *work_buffer, size_t work_buffer_size) {
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AMS_ABORT_UNLESS((offset % SectorAlignment) == 0);
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AMS_ABORT_UNLESS((work_buffer_size % SectorAlignment) == 0);
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crypto::Sha256Generator generator;
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generator.Initialize();
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size_t total_read = 0;
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while (total_read < hash_size) {
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size_t cur_read_size = std::min<size_t>(work_buffer_size, size - total_read);
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size_t cur_update_size = std::min<size_t>(cur_read_size, hash_size - total_read);
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R_TRY(this->Read(work_buffer, cur_read_size, offset + total_read));
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generator.Update(work_buffer, cur_update_size);
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total_read += cur_read_size;
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}
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generator.GetHash(dst, hash_size);
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R_SUCCEED();
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}
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size_t Boot0Accessor::GetBootloaderVersion(void *bct) {
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u32 version = *reinterpret_cast<u32 *>(reinterpret_cast<uintptr_t>(bct) + BctVersionOffset);
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AMS_ABORT_UNLESS(version <= BctVersionMax);
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return static_cast<size_t>(version);
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}
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size_t Boot0Accessor::GetEksIndex(size_t bootloader_version) {
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AMS_ABORT_UNLESS(bootloader_version <= BctVersionMax);
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return (bootloader_version > 0) ? bootloader_version - 1 : 0;
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}
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void Boot0Accessor::CopyEks(void *dst_bct, const void *src_eks, size_t eks_index) {
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std::memcpy(reinterpret_cast<u8 *>(dst_bct) + BctEksOffset, reinterpret_cast<const u8 *>(src_eks) + eks_index * EksEntrySize, EksBlobSize);
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}
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Result Boot0Accessor::UpdateEks(void *dst_bct, void *eks_work_buffer) {
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size_t read_size;
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R_TRY(this->Read(&read_size, eks_work_buffer, EksSize, Boot0Partition::Eks));
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R_RETURN(this->UpdateEksManually(dst_bct, eks_work_buffer));
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}
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Result Boot0Accessor::UpdateEksManually(void *dst_bct, const void *src_eks) {
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this->CopyEks(dst_bct, src_eks, GetEksIndex(GetBootloaderVersion(dst_bct)));
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R_SUCCEED();
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}
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Result Boot0Accessor::PreserveAutoRcm(void *dst_bct, void *work_buffer, Boot0Partition which) {
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std::memset(work_buffer, 0, BctSize);
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size_t read_size;
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R_TRY(this->Read(&read_size, work_buffer, BctSize, which));
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/* NOTE: AutoRcm is only viable on Erista, so hardcode erista offsets. */
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void *dst_pubk = reinterpret_cast<void *>(reinterpret_cast<uintptr_t>(dst_bct) + BctPubkOffsetErista);
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void *src_pubk = reinterpret_cast<void *>(reinterpret_cast<uintptr_t>(work_buffer) + BctPubkOffsetErista);
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std::memcpy(dst_pubk, src_pubk, BctPubkSize);
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R_SUCCEED();
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}
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Result Boot0Accessor::DetectCustomPublicKey(bool *out, void *work_buffer, BootImageUpdateType boot_image_update_type) {
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std::memset(work_buffer, 0, BctSize);
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const size_t pubk_offset = GetBctPubkOffset(boot_image_update_type);
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size_t read_size;
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R_TRY(this->Read(&read_size, work_buffer, BctSize, Boot0Partition::BctNormalMain));
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if (std::memcmp(reinterpret_cast<void *>(reinterpret_cast<uintptr_t>(work_buffer) + pubk_offset), CustomPublicKey, sizeof(CustomPublicKey)) != 0) {
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*out = false;
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R_SUCCEED();
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}
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R_TRY(this->Read(&read_size, work_buffer, BctSize, Boot0Partition::BctSafeMain));
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if (std::memcmp(reinterpret_cast<void *>(reinterpret_cast<uintptr_t>(work_buffer) + pubk_offset), CustomPublicKey, sizeof(CustomPublicKey)) != 0) {
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*out = false;
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R_SUCCEED();
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}
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*out = true;
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R_SUCCEED();
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}
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}
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