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