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FileSys/cia: add ticket parsing

This commit is contained in:
Weiyi Wang 2018-09-04 12:28:38 -04:00
parent b70e2bce58
commit df77491938
8 changed files with 178 additions and 27 deletions
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3
src/core/CMakeLists.txt
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@ -50,6 +50,7 @@ add_library(core STATIC
file_sys/archive_source_sd_savedata.h
file_sys/archive_systemsavedata.cpp
file_sys/archive_systemsavedata.h
file_sys/cia_common.h
file_sys/cia_container.cpp
file_sys/cia_container.h
file_sys/directory_backend.h
@ -68,6 +69,8 @@ add_library(core STATIC
file_sys/romfs_reader.h
file_sys/savedata_archive.cpp
file_sys/savedata_archive.h
file_sys/ticket.cpp
file_sys/ticket.h
file_sys/title_metadata.cpp
file_sys/title_metadata.h
frontend/applets/default_applets.cpp

40
src/core/file_sys/cia_common.h Normal file
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@ -0,0 +1,40 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/assert.h"
#include "common/common_types.h"
namespace FileSys {
enum TMDSignatureType : u32 {
Rsa4096Sha1 = 0x10000,
Rsa2048Sha1 = 0x10001,
EllipticSha1 = 0x10002,
Rsa4096Sha256 = 0x10003,
Rsa2048Sha256 = 0x10004,
EcdsaSha256 = 0x10005
};
inline u32 GetSignatureSize(u32 signature_type) {
switch (signature_type) {
case Rsa4096Sha1:
case Rsa4096Sha256:
return 0x200;
case Rsa2048Sha1:
case Rsa2048Sha256:
return 0x100;
case EllipticSha1:
case EcdsaSha256:
return 0x3C;
}
UNREACHABLE();
return 0;
}
} // namespace FileSys

9
src/core/file_sys/cia_container.cpp
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@ -124,6 +124,11 @@ Loader::ResultStatus CIAContainer::LoadHeader(const std::vector<u8>& header_data
return Loader::ResultStatus::Success;
}
Loader::ResultStatus CIAContainer::LoadTicket(const std::vector<u8>& ticket_data,
std::size_t offset) {
return cia_ticket.Load(ticket_data, offset);
}
Loader::ResultStatus CIAContainer::LoadTitleMetadata(const std::vector<u8>& tmd_data,
std::size_t offset) {
return cia_tmd.Load(tmd_data, offset);
@ -139,6 +144,10 @@ Loader::ResultStatus CIAContainer::LoadMetadata(const std::vector<u8>& meta_data
return Loader::ResultStatus::Success;
}
const Ticket& CIAContainer::GetTicket() const {
return cia_ticket;
}
const TitleMetadata& CIAContainer::GetTitleMetadata() const {
return cia_tmd;
}

4
src/core/file_sys/cia_container.h
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@ -10,6 +10,7 @@
#include <vector>
#include "common/common_types.h"
#include "common/swap.h"
#include "core/file_sys/ticket.h"
#include "core/file_sys/title_metadata.h"
namespace Loader {
@ -44,9 +45,11 @@ public:
// Load parts of CIAs (for CIAs streamed in)
Loader::ResultStatus LoadHeader(const std::vector<u8>& header_data, std::size_t offset = 0);
Loader::ResultStatus LoadTicket(const std::vector<u8>& ticket_data, std::size_t offset = 0);
Loader::ResultStatus LoadTitleMetadata(const std::vector<u8>& tmd_data, std::size_t offset = 0);
Loader::ResultStatus LoadMetadata(const std::vector<u8>& meta_data, std::size_t offset = 0);
const Ticket& GetTicket() const;
const TitleMetadata& GetTitleMetadata() const;
std::array<u64, 0x30>& GetDependencies();
u32 GetCoreVersion() const;
@ -99,6 +102,7 @@ private:
Header cia_header;
Metadata cia_metadata;
Ticket cia_ticket;
TitleMetadata cia_tmd;
};

56
src/core/file_sys/ticket.cpp Normal file
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@ -0,0 +1,56 @@
// 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);
// 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;
}
boost::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 boost::none;
}
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

58
src/core/file_sys/ticket.h Normal file
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@ -0,0 +1,58 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <string>
#include <vector>
#include <boost/optional.hpp>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/swap.h"
namespace Loader {
enum class ResultStatus;
}
namespace FileSys {
class Ticket {
public:
#pragma pack(push, 1)
struct Body {
std::array<u8, 0x40> issuer;
std::array<u8, 0x3C> ecc_public_key;
u8 version;
u8 ca_crl_version;
u8 signer_crl_version;
std::array<u8, 0x10> title_key;
INSERT_PADDING_BYTES(1);
u64_be ticket_id;
u32_be console_id;
u64_be title_id;
INSERT_PADDING_BYTES(2);
u16_be ticket_title_version;
INSERT_PADDING_BYTES(8);
u8 license_type;
u8 common_key_index;
INSERT_PADDING_BYTES(0x2A);
u32_be eshop_account_id;
INSERT_PADDING_BYTES(1);
u8 audit;
INSERT_PADDING_BYTES(0x42);
std::array<u8, 0x40> limits;
std::array<u8, 0xAC> content_index;
};
static_assert(sizeof(Body) == 0x210, "Ticket body structure size is wrong");
#pragma pack(pop)
Loader::ResultStatus Load(const std::vector<u8> file_data, std::size_t offset = 0);
boost::optional<std::array<u8, 16>> GetTitleKey() const;
private:
Body ticket_body;
u32_be signature_type;
std::vector<u8> ticket_signature;
};
} // namespace FileSys

25
src/core/file_sys/title_metadata.cpp
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@ -7,6 +7,7 @@
#include "common/alignment.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "core/file_sys/cia_common.h"
#include "core/file_sys/title_metadata.h"
#include "core/loader/loader.h"
@ -15,24 +16,6 @@
namespace FileSys {
static u32 GetSignatureSize(u32 signature_type) {
switch (signature_type) {
case Rsa4096Sha1:
case Rsa4096Sha256:
return 0x200;
case Rsa2048Sha1:
case Rsa2048Sha256:
return 0x100;
case EllipticSha1:
case EcdsaSha256:
return 0x3C;
}
return 0;
}
Loader::ResultStatus TitleMetadata::Load(const std::string& file_path) {
FileUtil::IOFile file(file_path, "rb");
if (!file.IsOpen())
@ -188,6 +171,12 @@ u64 TitleMetadata::GetContentSizeByIndex(u16 index) const {
return tmd_chunks[index].size;
}
std::array<u8, 16> TitleMetadata::GetContentCTRByIndex(u16 index) const {
std::array<u8, 16> ctr{};
std::memcpy(ctr.data(), &tmd_chunks[index].index, sizeof(u16));
return ctr;
}
void TitleMetadata::SetTitleID(u64 title_id) {
tmd_body.title_id = title_id;
}

10
src/core/file_sys/title_metadata.h
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@ -19,15 +19,6 @@ enum class ResultStatus;
namespace FileSys {
enum TMDSignatureType : u32 {
Rsa4096Sha1 = 0x10000,
Rsa2048Sha1 = 0x10001,
EllipticSha1 = 0x10002,
Rsa4096Sha256 = 0x10003,
Rsa2048Sha256 = 0x10004,
EcdsaSha256 = 0x10005
};
enum TMDContentTypeFlag : u16 {
Encrypted = 1 << 0,
Disc = 1 << 2,
@ -108,6 +99,7 @@ public:
u32 GetContentIDByIndex(u16 index) const;
u16 GetContentTypeByIndex(u16 index) const;
u64 GetContentSizeByIndex(u16 index) const;
std::array<u8, 16> GetContentCTRByIndex(u16 index) const;
void SetTitleID(u64 title_id);
void SetTitleType(u32 type);