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Merge pull request #1486 from lioncash/file

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key_manager/partition_data_manager: Minor changes
This commit is contained in:
bunnei 2018-10-14 14:46:47 -04:00 committed by GitHub
commit b3cca34f50
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 72 additions and 63 deletions
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43
src/core/crypto/key_manager.cpp
View File

@ -98,7 +98,7 @@ std::array<u8, 144> DecryptKeyblob(const std::array<u8, 176>& encrypted_keyblob,
return keyblob;
}
void KeyManager::DeriveGeneralPurposeKeys(u8 crypto_revision) {
void KeyManager::DeriveGeneralPurposeKeys(std::size_t crypto_revision) {
const auto kek_generation_source =
GetKey(S128KeyType::Source, static_cast<u64>(SourceKeyType::AESKekGeneration));
const auto key_generation_source =
@ -147,31 +147,38 @@ boost::optional<Key128> DeriveSDSeed() {
"rb+");
if (!save_43.IsOpen())
return boost::none;
const FileUtil::IOFile sd_private(
FileUtil::GetUserPath(FileUtil::UserPath::SDMCDir) + "/Nintendo/Contents/private", "rb+");
if (!sd_private.IsOpen())
return boost::none;
sd_private.Seek(0, SEEK_SET);
std::array<u8, 0x10> private_seed{};
if (sd_private.ReadBytes(private_seed.data(), private_seed.size()) != 0x10)
if (sd_private.ReadBytes(private_seed.data(), private_seed.size()) != private_seed.size()) {
return boost::none;
}
std::array<u8, 0x10> buffer{};
std::size_t offset = 0;
for (; offset + 0x10 < save_43.GetSize(); ++offset) {
save_43.Seek(offset, SEEK_SET);
save_43.ReadBytes(buffer.data(), buffer.size());
if (buffer == private_seed)
break;
if (!save_43.Seek(offset, SEEK_SET)) {
return boost::none;
}
if (offset + 0x10 >= save_43.GetSize())
save_43.ReadBytes(buffer.data(), buffer.size());
if (buffer == private_seed) {
break;
}
}
if (!save_43.Seek(offset + 0x10, SEEK_SET)) {
return boost::none;
}
Key128 seed{};
save_43.Seek(offset + 0x10, SEEK_SET);
save_43.ReadBytes(seed.data(), seed.size());
if (save_43.ReadBytes(seed.data(), seed.size()) != seed.size()) {
return boost::none;
}
return seed;
}
@ -234,7 +241,9 @@ std::vector<TicketRaw> GetTicketblob(const FileUtil::IOFile& ticket_save) {
return {};
std::vector<u8> buffer(ticket_save.GetSize());
ticket_save.ReadBytes(buffer.data(), buffer.size());
if (ticket_save.ReadBytes(buffer.data(), buffer.size()) != buffer.size()) {
return {};
}
std::vector<TicketRaw> out;
u32 magic{};
@ -261,6 +270,9 @@ static std::array<u8, size> operator^(const std::array<u8, size>& lhs,
template <size_t target_size, size_t in_size>
static std::array<u8, target_size> MGF1(const std::array<u8, in_size>& seed) {
// Avoids truncation overflow within the loop below.
static_assert(target_size <= 0xFF);
std::array<u8, in_size + 4> seed_exp{};
std::memcpy(seed_exp.data(), seed.data(), in_size);
@ -268,7 +280,7 @@ static std::array<u8, target_size> MGF1(const std::array<u8, in_size>& seed) {
size_t i = 0;
while (out.size() < target_size) {
out.resize(out.size() + 0x20);
seed_exp[in_size + 3] = i;
seed_exp[in_size + 3] = static_cast<u8>(i);
mbedtls_sha256(seed_exp.data(), seed_exp.size(), out.data() + out.size() - 0x20, 0);
++i;
}
@ -299,10 +311,11 @@ boost::optional<std::pair<Key128, Key128>> ParseTicket(const TicketRaw& ticket,
std::memcpy(&cert_authority, ticket.data() + 0x140, sizeof(cert_authority));
if (cert_authority == 0)
return boost::none;
if (cert_authority != Common::MakeMagic('R', 'o', 'o', 't'))
if (cert_authority != Common::MakeMagic('R', 'o', 'o', 't')) {
LOG_INFO(Crypto,
"Attempting to parse ticket with non-standard certificate authority {:08X}.",
cert_authority);
}
Key128 rights_id;
std::memcpy(rights_id.data(), ticket.data() + 0x2A0, sizeof(Key128));
@ -871,9 +884,9 @@ void KeyManager::DeriveETicket(PartitionDataManager& data) {
"/system/save/80000000000000e2",
"rb+");
const auto blob2 = GetTicketblob(save2);
auto res = GetTicketblob(save1);
const auto res2 = GetTicketblob(save2);
std::copy(res2.begin(), res2.end(), std::back_inserter(res));
res.insert(res.end(), blob2.begin(), blob2.end());
for (const auto& raw : res) {
const auto pair = ParseTicket(raw, rsa_key);

2
src/core/crypto/key_manager.h
View File

@ -175,7 +175,7 @@ private:
void WriteKeyToFile(KeyCategory category, std::string_view keyname,
const std::array<u8, Size>& key);
void DeriveGeneralPurposeKeys(u8 crypto_revision);
void DeriveGeneralPurposeKeys(std::size_t crypto_revision);
void SetKeyWrapped(S128KeyType id, Key128 key, u64 field1 = 0, u64 field2 = 0);
void SetKeyWrapped(S256KeyType id, Key256 key, u64 field1 = 0, u64 field2 = 0);

76
src/core/crypto/partition_data_manager.cpp
View File

@ -11,7 +11,6 @@
#include <array>
#include <cctype>
#include <cstring>
#include <boost/optional/optional.hpp>
#include <mbedtls/sha256.h>
#include "common/assert.h"
#include "common/common_funcs.h"
@ -19,7 +18,7 @@
#include "common/hex_util.h"
#include "common/logging/log.h"
#include "common/string_util.h"
#include "core/crypto/ctr_encryption_layer.h"
#include "common/swap.h"
#include "core/crypto/key_manager.h"
#include "core/crypto/partition_data_manager.h"
#include "core/crypto/xts_encryption_layer.h"
@ -302,7 +301,7 @@ FileSys::VirtualFile FindFileInDirWithNames(const FileSys::VirtualDir& dir,
return nullptr;
}
PartitionDataManager::PartitionDataManager(FileSys::VirtualDir sysdata_dir)
PartitionDataManager::PartitionDataManager(const FileSys::VirtualDir& sysdata_dir)
: boot0(FindFileInDirWithNames(sysdata_dir, "BOOT0")),
fuses(FindFileInDirWithNames(sysdata_dir, "fuse")),
kfuses(FindFileInDirWithNames(sysdata_dir, "kfuse")),
@ -314,13 +313,14 @@ PartitionDataManager::PartitionDataManager(FileSys::VirtualDir sysdata_dir)
FindFileInDirWithNames(sysdata_dir, "BCPKG2-5-Repair-Main"),
FindFileInDirWithNames(sysdata_dir, "BCPKG2-6-Repair-Sub"),
}),
prodinfo(FindFileInDirWithNames(sysdata_dir, "PRODINFO")),
secure_monitor(FindFileInDirWithNames(sysdata_dir, "secmon")),
package1_decrypted(FindFileInDirWithNames(sysdata_dir, "pkg1_decr")),
secure_monitor_bytes(secure_monitor == nullptr ? std::vector<u8>{}
: secure_monitor->ReadAllBytes()),
package1_decrypted_bytes(package1_decrypted == nullptr ? std::vector<u8>{}
: package1_decrypted->ReadAllBytes()),
prodinfo(FindFileInDirWithNames(sysdata_dir, "PRODINFO")) {}
: package1_decrypted->ReadAllBytes()) {
}
PartitionDataManager::~PartitionDataManager() = default;
@ -332,18 +332,19 @@ FileSys::VirtualFile PartitionDataManager::GetBoot0Raw() const {
return boot0;
}
std::array<u8, 176> PartitionDataManager::GetEncryptedKeyblob(u8 index) const {
if (HasBoot0() && index < 32)
PartitionDataManager::EncryptedKeyBlob PartitionDataManager::GetEncryptedKeyblob(
std::size_t index) const {
if (HasBoot0() && index < NUM_ENCRYPTED_KEYBLOBS)
return GetEncryptedKeyblobs()[index];
return {};
}
std::array<std::array<u8, 176>, 32> PartitionDataManager::GetEncryptedKeyblobs() const {
PartitionDataManager::EncryptedKeyBlobs PartitionDataManager::GetEncryptedKeyblobs() const {
if (!HasBoot0())
return {};
std::array<std::array<u8, 176>, 32> out{};
for (size_t i = 0; i < 0x20; ++i)
EncryptedKeyBlobs out{};
for (size_t i = 0; i < out.size(); ++i)
boot0->Read(out[i].data(), out[i].size(), 0x180000 + i * 0x200);
return out;
}
@ -389,7 +390,7 @@ std::array<u8, 16> PartitionDataManager::GetKeyblobMACKeySource() const {
return FindKeyFromHex(package1_decrypted_bytes, source_hashes[0]);
}
std::array<u8, 16> PartitionDataManager::GetKeyblobKeySource(u8 revision) const {
std::array<u8, 16> PartitionDataManager::GetKeyblobKeySource(std::size_t revision) const {
if (keyblob_source_hashes[revision] == SHA256Hash{}) {
LOG_WARNING(Crypto,
"No keyblob source hash for crypto revision {:02X}! Cannot derive keys...",
@ -446,7 +447,7 @@ bool AttemptDecrypt(const std::array<u8, 16>& key, Package2Header& header) {
return false;
}
void PartitionDataManager::DecryptPackage2(std::array<std::array<u8, 16>, 0x20> package2_keys,
void PartitionDataManager::DecryptPackage2(const std::array<Key128, 0x20>& package2_keys,
Package2Type type) {
FileSys::VirtualFile file = std::make_shared<FileSys::OffsetVfsFile>(
package2[static_cast<size_t>(type)],
@ -456,43 +457,38 @@ void PartitionDataManager::DecryptPackage2(std::array<std::array<u8, 16>, 0x20>
if (file->ReadObject(&header) != sizeof(Package2Header))
return;
u8 revision = 0xFF;
std::size_t revision = 0xFF;
if (header.magic != Common::MakeMagic('P', 'K', '2', '1')) {
for (size_t i = 0; i < package2_keys.size(); ++i) {
if (AttemptDecrypt(package2_keys[i], header))
for (std::size_t i = 0; i < package2_keys.size(); ++i) {
if (AttemptDecrypt(package2_keys[i], header)) {
revision = i;
}
}
}
if (header.magic != Common::MakeMagic('P', 'K', '2', '1'))
return;
const std::vector<u8> s1_iv(header.section_ctr[1].begin(), header.section_ctr[1].end());
const auto a = std::make_shared<FileSys::OffsetVfsFile>(
file, header.section_size[1], header.section_size[0] + sizeof(Package2Header));
auto c = a->ReadAllBytes();
AESCipher<Key128> cipher(package2_keys[revision], Mode::CTR);
cipher.SetIV(s1_iv);
cipher.SetIV({header.section_ctr[1].begin(), header.section_ctr[1].end()});
cipher.Transcode(c.data(), c.size(), c.data(), Op::Decrypt);
// package2_decrypted[static_cast<size_t>(type)] = s1;
INIHeader ini;
std::memcpy(&ini, c.data(), sizeof(INIHeader));
if (ini.magic != Common::MakeMagic('I', 'N', 'I', '1'))
return;
std::map<u64, KIPHeader> kips{};
u64 offset = sizeof(INIHeader);
for (size_t i = 0; i < ini.process_count; ++i) {
KIPHeader kip;
std::memcpy(&kip, c.data() + offset, sizeof(KIPHeader));
if (kip.magic != Common::MakeMagic('K', 'I', 'P', '1'))
return;
kips.emplace(offset, kip);
const auto name =
Common::StringFromFixedZeroTerminatedBuffer(kip.name.data(), kip.name.size());
@ -503,33 +499,29 @@ void PartitionDataManager::DecryptPackage2(std::array<std::array<u8, 16>, 0x20>
continue;
}
std::vector<u8> text(kip.sections[0].size_compressed);
std::vector<u8> rodata(kip.sections[1].size_compressed);
std::vector<u8> data(kip.sections[2].size_compressed);
const u64 initial_offset = sizeof(KIPHeader) + offset;
const auto text_begin = c.cbegin() + initial_offset;
const auto text_end = text_begin + kip.sections[0].size_compressed;
const std::vector<u8> text = DecompressBLZ({text_begin, text_end});
u64 offset_sec = sizeof(KIPHeader) + offset;
std::memcpy(text.data(), c.data() + offset_sec, text.size());
offset_sec += text.size();
std::memcpy(rodata.data(), c.data() + offset_sec, rodata.size());
offset_sec += rodata.size();
std::memcpy(data.data(), c.data() + offset_sec, data.size());
const auto rodata_end = text_end + kip.sections[1].size_compressed;
const std::vector<u8> rodata = DecompressBLZ({text_end, rodata_end});
offset += sizeof(KIPHeader) + kip.sections[0].size_compressed +
kip.sections[1].size_compressed + kip.sections[2].size_compressed;
const auto data_end = rodata_end + kip.sections[2].size_compressed;
const std::vector<u8> data = DecompressBLZ({rodata_end, data_end});
text = DecompressBLZ(text);
rodata = DecompressBLZ(rodata);
data = DecompressBLZ(data);
std::vector<u8> out;
out.reserve(text.size() + rodata.size() + data.size());
out.insert(out.end(), text.begin(), text.end());
out.insert(out.end(), rodata.begin(), rodata.end());
out.insert(out.end(), data.begin(), data.end());
std::vector<u8> out(text.size() + rodata.size() + data.size());
std::memcpy(out.data(), text.data(), text.size());
std::memcpy(out.data() + text.size(), rodata.data(), rodata.size());
std::memcpy(out.data() + text.size() + rodata.size(), data.data(), data.size());
offset += sizeof(KIPHeader) + out.size();
if (name == "FS")
package2_fs[static_cast<size_t>(type)] = out;
package2_fs[static_cast<size_t>(type)] = std::move(out);
else if (name == "spl")
package2_spl[static_cast<size_t>(type)] = out;
package2_spl[static_cast<size_t>(type)] = std::move(out);
}
}

18
src/core/crypto/partition_data_manager.h
View File

@ -5,9 +5,7 @@
#pragma once
#include <vector>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/swap.h"
#include "core/file_sys/vfs_types.h"
namespace Core::Crypto {
@ -24,15 +22,20 @@ enum class Package2Type {
class PartitionDataManager {
public:
static const u8 MAX_KEYBLOB_SOURCE_HASH;
static constexpr std::size_t NUM_ENCRYPTED_KEYBLOBS = 32;
static constexpr std::size_t ENCRYPTED_KEYBLOB_SIZE = 0xB0;
explicit PartitionDataManager(FileSys::VirtualDir sysdata_dir);
using EncryptedKeyBlob = std::array<u8, ENCRYPTED_KEYBLOB_SIZE>;
using EncryptedKeyBlobs = std::array<EncryptedKeyBlob, NUM_ENCRYPTED_KEYBLOBS>;
explicit PartitionDataManager(const FileSys::VirtualDir& sysdata_dir);
~PartitionDataManager();
// BOOT0
bool HasBoot0() const;
FileSys::VirtualFile GetBoot0Raw() const;
std::array<u8, 0xB0> GetEncryptedKeyblob(u8 index) const;
std::array<std::array<u8, 0xB0>, 0x20> GetEncryptedKeyblobs() const;
EncryptedKeyBlob GetEncryptedKeyblob(std::size_t index) const;
EncryptedKeyBlobs GetEncryptedKeyblobs() const;
std::vector<u8> GetSecureMonitor() const;
std::array<u8, 0x10> GetPackage2KeySource() const;
std::array<u8, 0x10> GetAESKekGenerationSource() const;
@ -43,7 +46,7 @@ public:
std::vector<u8> GetPackage1Decrypted() const;
std::array<u8, 0x10> GetMasterKeySource() const;
std::array<u8, 0x10> GetKeyblobMACKeySource() const;
std::array<u8, 0x10> GetKeyblobKeySource(u8 revision) const;
std::array<u8, 0x10> GetKeyblobKeySource(std::size_t revision) const;
// Fuses
bool HasFuses() const;
@ -57,7 +60,8 @@ public:
// Package2
bool HasPackage2(Package2Type type = Package2Type::NormalMain) const;
FileSys::VirtualFile GetPackage2Raw(Package2Type type = Package2Type::NormalMain) const;
void DecryptPackage2(std::array<std::array<u8, 16>, 0x20> package2, Package2Type type);
void DecryptPackage2(const std::array<std::array<u8, 16>, 0x20>& package2_keys,
Package2Type type);
const std::vector<u8>& GetPackage2FSDecompressed(
Package2Type type = Package2Type::NormalMain) const;
std::array<u8, 0x10> GetKeyAreaKeyApplicationSource(