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Use CertECC struct instead of hardcoded offsets

This commit is contained in:
Léo Lam 2018-05-17 21:55:02 +02:00
parent 5de2f960a1
commit 44827ba369
4 changed files with 34 additions and 37 deletions
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11
Source/Core/Core/HW/WiiSave.cpp
View File

@ -454,9 +454,10 @@ void WiiSave::do_sig()
}
// Sign the data.
IOS::Certificate ap_cert;
IOS::CertECC ap_cert;
IOS::ECCSignature ap_sig;
m_ios.GetIOSC().Sign(ap_sig.data(), ap_cert.data(), Titles::SYSTEM_MENU, data.get(), data_size);
m_ios.GetIOSC().Sign(ap_sig.data(), reinterpret_cast<u8*>(&ap_cert), Titles::SYSTEM_MENU,
data.get(), data_size);
// Write signatures.
data_file.Open(m_encrypted_save_path, "ab");
@ -469,9 +470,9 @@ void WiiSave::do_sig()
data_file.WriteArray(ap_sig.data(), ap_sig.size());
const u32 SIGNATURE_END_MAGIC = Common::swap32(0x2f536969);
data_file.WriteArray(&SIGNATURE_END_MAGIC, 1);
const IOS::Certificate device_certificate = m_ios.GetIOSC().GetDeviceCertificate();
data_file.WriteArray(device_certificate.data(), device_certificate.size());
data_file.WriteArray(ap_cert.data(), ap_cert.size());
const IOS::CertECC device_certificate = m_ios.GetIOSC().GetDeviceCertificate();
data_file.WriteArray(&device_certificate, 1);
data_file.WriteArray(&ap_cert, 1);
m_valid = data_file.IsGood();
}

4
Source/Core/Core/IOS/ES/Identity.cpp
View File

@ -96,8 +96,8 @@ IPCCommandResult ES::GetDeviceCertificate(const IOCtlVRequest& request)
INFO_LOG(IOS_ES, "IOCTL_ES_GETDEVICECERT");
const auto cert = m_ios.GetIOSC().GetDeviceCertificate();
Memory::CopyToEmu(request.io_vectors[0].address, cert.data(), cert.size());
const IOS::CertECC cert = m_ios.GetIOSC().GetDeviceCertificate();
Memory::CopyToEmu(request.io_vectors[0].address, &cert, sizeof(cert));
return GetDefaultReply(IPC_SUCCESS);
}

47
Source/Core/Core/IOS/IOSC.cpp
View File

@ -417,29 +417,25 @@ u32 IOSC::GetDeviceId() const
// Copyright 2007,2008 Segher Boessenkool <segher@kernel.crashing.org>
// Licensed under the terms of the GNU GPL, version 2
// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
static Certificate MakeBlankSigECCert(const std::string& signer, const std::string& name,
const u8* private_key, u32 key_id)
static CertECC MakeBlankEccCert(const std::string& issuer, const std::string& name,
const u8* private_key, u32 key_id)
{
Certificate cert_out{};
const u32 type = Common::swap32(static_cast<u32>(SignatureType::ECC));
std::memcpy(cert_out.data(), &type, sizeof(type));
std::strncpy(reinterpret_cast<char*>(cert_out.data()) + 0x80, signer.c_str(), 0x40);
const u32 two = Common::swap32(2);
std::memcpy(cert_out.data() + 0xc0, &two, sizeof(two));
std::strncpy(reinterpret_cast<char*>(cert_out.data()) + 0xc4, name.c_str(), 0x40);
const u32 swapped_key_id = Common::swap32(key_id);
std::memcpy(cert_out.data() + 0x104, &swapped_key_id, sizeof(swapped_key_id));
const std::array<u8, 60> public_key = Common::ec::PrivToPub(private_key);
std::copy(public_key.cbegin(), public_key.cend(), cert_out.begin() + 0x108);
return cert_out;
CertECC cert{};
cert.signature.type = SignatureType(Common::swap32(u32(SignatureType::ECC)));
std::strncpy(cert.signature.issuer, issuer.c_str(), 0x40);
cert.header.public_key_type = PublicKeyType(Common::swap32(u32(PublicKeyType::ECC)));
std::strncpy(cert.header.name, name.c_str(), 0x40);
cert.header.id = Common::swap32(key_id);
cert.public_key = Common::ec::PrivToPub(private_key);
return cert;
}
Certificate IOSC::GetDeviceCertificate() const
CertECC IOSC::GetDeviceCertificate() const
{
const std::string name = StringFromFormat("NG%08x", GetDeviceId());
auto cert = MakeBlankSigECCert(StringFromFormat("Root-CA%08x-MS%08x", m_ca_id, m_ms_id), name,
m_key_entries[HANDLE_CONSOLE_KEY].data.data(), m_console_key_id);
std::copy(m_console_signature.begin(), m_console_signature.end(), cert.begin() + 4);
auto cert = MakeBlankEccCert(StringFromFormat("Root-CA%08x-MS%08x", m_ca_id, m_ms_id), name,
m_key_entries[HANDLE_CONSOLE_KEY].data.data(), m_console_key_id);
cert.signature.sig = m_console_signature;
return cert;
}
@ -456,15 +452,16 @@ void IOSC::Sign(u8* sig_out, u8* ap_cert_out, u64 title_id, const u8* data, u32
const std::string signer =
StringFromFormat("Root-CA%08x-MS%08x-NG%08x", m_ca_id, m_ms_id, GetDeviceId());
const std::string name = StringFromFormat("AP%016" PRIx64, title_id);
const auto cert = MakeBlankSigECCert(signer, name, ap_priv.data(), 0);
std::copy(cert.begin(), cert.end(), ap_cert_out);
mbedtls_sha1(ap_cert_out + 0x80, 0x100, hash.data());
auto signature = Common::ec::Sign(m_key_entries[HANDLE_CONSOLE_KEY].data.data(), hash.data());
std::copy(signature.cbegin(), signature.cend(), ap_cert_out + 4);
CertECC cert = MakeBlankEccCert(signer, name, ap_priv.data(), 0);
// Sign the AP cert.
const size_t skip = offsetof(CertECC, signature.issuer);
mbedtls_sha1(reinterpret_cast<const u8*>(&cert) + skip, sizeof(cert) - skip, hash.data());
cert.signature.sig = Common::ec::Sign(m_key_entries[HANDLE_CONSOLE_KEY].data.data(), hash.data());
std::memcpy(ap_cert_out, &cert, sizeof(cert));
// Sign the data.
mbedtls_sha1(data, data_size, hash.data());
signature = Common::ec::Sign(ap_priv.data(), hash.data());
const auto signature = Common::ec::Sign(ap_priv.data(), hash.data());
std::copy(signature.cbegin(), signature.cend(), sig_out);
}

9
Source/Core/Core/IOS/IOSC.h
View File

@ -37,6 +37,8 @@ enum class PublicKeyType : u32
ECC = 2,
};
using ECCSignature = std::array<u8, 60>;
#pragma pack(push, 4)
struct SignatureRSA4096
{
@ -59,7 +61,7 @@ static_assert(sizeof(SignatureRSA2048) == 0x180, "Wrong size for SignatureRSA204
struct SignatureECC
{
SignatureType type;
u8 sig[0x3c];
ECCSignature sig;
u8 fill[0x40];
char issuer[0x40];
};
@ -117,9 +119,6 @@ struct CertECC
static_assert(sizeof(CertECC) == 0x180, "Wrong size for CertECC");
#pragma pack(pop)
using ECCSignature = std::array<u8, 60>;
using Certificate = std::array<u8, 0x180>;
namespace HLE
{
enum ReturnCode : s32;
@ -223,7 +222,7 @@ public:
bool IsUsingDefaultId() const;
u32 GetDeviceId() const;
Certificate GetDeviceCertificate() const;
CertECC GetDeviceCertificate() const;
void Sign(u8* sig_out, u8* ap_cert_out, u64 title_id, const u8* data, u32 data_size) const;
void DoState(PointerWrap& p);