mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-18 16:32:05 +00:00
368 lines
16 KiB
C++
368 lines
16 KiB
C++
/*
|
|
* 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 <exosphere.hpp>
|
|
#include "../secmon_error.hpp"
|
|
#include "../secmon_key_storage.hpp"
|
|
#include "../secmon_page_mapper.hpp"
|
|
#include "secmon_smc_aes.hpp"
|
|
#include "secmon_smc_rsa.hpp"
|
|
#include "secmon_smc_se_lock.hpp"
|
|
|
|
namespace ams::secmon::smc {
|
|
|
|
namespace {
|
|
|
|
struct ModularExponentiateByStorageKeyOption {
|
|
using Mode = util::BitPack32::Field<0, 2, u32>;
|
|
using Reserved = util::BitPack32::Field<2, 30, u32>;
|
|
};
|
|
|
|
struct PrepareEsDeviceUniqueKeyOption {
|
|
using KeyGeneration = util::BitPack32::Field<0, 6, int>;
|
|
using Type = util::BitPack32::Field<6, 2, EsCommonKeyType>;
|
|
using Reserved = util::BitPack32::Field<8, 24, u32>;
|
|
};
|
|
|
|
constexpr const u8 ModularExponentiateByStorageKeyTable[] = {
|
|
static_cast<u8>(ImportRsaKey_Lotus),
|
|
static_cast<u8>(ImportRsaKey_Ssl),
|
|
static_cast<u8>(ImportRsaKey_EsClientCert),
|
|
};
|
|
constexpr size_t ModularExponentiateByStorageKeyTableSize = util::size(ModularExponentiateByStorageKeyTable);
|
|
|
|
consteval u32 GetModeForImportRsaKey(ImportRsaKey import_key) {
|
|
for (size_t i = 0; i < ModularExponentiateByStorageKeyTableSize; ++i) {
|
|
if (static_cast<ImportRsaKey>(ModularExponentiateByStorageKeyTable[i]) == import_key) {
|
|
return i;
|
|
}
|
|
}
|
|
|
|
AMS_ASSUME(false);
|
|
}
|
|
|
|
class PrepareEsDeviceUniqueKeyAsyncArguments {
|
|
private:
|
|
int m_generation;
|
|
EsCommonKeyType m_type;
|
|
u8 m_label_digest[crypto::Sha256Generator::HashSize];
|
|
public:
|
|
void Set(int gen, EsCommonKeyType t, const u8 ld[crypto::Sha256Generator::HashSize]) {
|
|
m_generation = gen;
|
|
m_type = t;
|
|
std::memcpy(m_label_digest, ld, sizeof(m_label_digest));
|
|
}
|
|
|
|
int GetKeyGeneration() const { return m_generation; }
|
|
EsCommonKeyType GetCommonKeyType() const { return m_type; }
|
|
void GetLabelDigest(u8 dst[crypto::Sha256Generator::HashSize]) const { std::memcpy(dst, m_label_digest, sizeof(m_label_digest)); }
|
|
};
|
|
|
|
class ModularExponentiateByStorageKeyAsyncArguments {
|
|
private:
|
|
u8 m_msg[se::RsaSize];
|
|
public:
|
|
void Set(const void *m, size_t m_size) {
|
|
AMS_UNUSED(m_size);
|
|
std::memcpy(m_msg, m, sizeof(m_msg));
|
|
}
|
|
|
|
const u8 *GetMessage() const { return m_msg; }
|
|
};
|
|
|
|
constinit SmcResult g_exp_mod_result = SmcResult::Success;
|
|
|
|
constinit bool g_test_exp_mod_public = false;
|
|
constinit int g_test_exp_mod_slot = pkg1::RsaKeySlot_Temporary;
|
|
constinit ImportRsaKey g_test_exp_mod_key = {};
|
|
|
|
constinit union {
|
|
ModularExponentiateByStorageKeyAsyncArguments modular_exponentiate_by_storage_key;
|
|
PrepareEsDeviceUniqueKeyAsyncArguments prepare_es_device_unique_key;
|
|
} g_async_arguments;
|
|
|
|
ALWAYS_INLINE ModularExponentiateByStorageKeyAsyncArguments &GetModularExponentiateByStorageKeyAsyncArguments() {
|
|
return g_async_arguments.modular_exponentiate_by_storage_key;
|
|
}
|
|
|
|
ALWAYS_INLINE PrepareEsDeviceUniqueKeyAsyncArguments &GetPrepareEsDeviceUniqueKeyAsyncArguments() {
|
|
return g_async_arguments.prepare_es_device_unique_key;
|
|
}
|
|
|
|
void SecurityEngineDoneHandler() {
|
|
/* End the asynchronous operation. */
|
|
g_exp_mod_result = SmcResult::Success;
|
|
EndAsyncOperation();
|
|
}
|
|
|
|
void TestRsaPublicKey(ImportRsaKey which, int slot, const void *mod, size_t mod_size, se::DoneHandler handler) {
|
|
/* Declare a buffer for our test message. */
|
|
u8 msg[se::RsaSize];
|
|
std::memset(msg, 'D', sizeof(msg));
|
|
|
|
/* Provisionally import the modulus. */
|
|
ImportRsaKeyModulusProvisionally(which, mod, mod_size);
|
|
|
|
/* Load the provisional public key into the slot. */
|
|
LoadProvisionalRsaPublicKey(slot, which);
|
|
|
|
/* Perform the test exponentiation. */
|
|
se::ModularExponentiateAsync(slot, msg, sizeof(msg), handler);
|
|
}
|
|
|
|
void TestRsaPrivateKey(ImportRsaKey which, int slot, se::DoneHandler handler) {
|
|
/* Get the result of the public key test. */
|
|
u8 msg[se::RsaSize];
|
|
se::GetRsaResult(msg, sizeof(msg));
|
|
|
|
/* Load the provisional private key into the slot. */
|
|
LoadProvisionalRsaKey(slot, which);
|
|
|
|
/* Perform the test exponentiation. */
|
|
se::ModularExponentiateAsync(slot, msg, sizeof(msg), handler);
|
|
}
|
|
|
|
void VerifyTestRsaKeyResult(ImportRsaKey which) {
|
|
/* Get the result of the test. */
|
|
u8 msg[se::RsaSize];
|
|
se::GetRsaResult(msg, sizeof(msg));
|
|
|
|
/* Validate the result. */
|
|
const bool is_valid = (msg[0] == 'D') & (crypto::IsSameBytes(msg, msg + 1, sizeof(msg) - 1));
|
|
|
|
/* If the test passes, the key is no longer provisional. */
|
|
if (is_valid) {
|
|
CommitRsaKeyModulus(which);
|
|
}
|
|
}
|
|
|
|
void TestRsaKeyDoneHandler() {
|
|
if (g_test_exp_mod_public) {
|
|
/* If we're testing the public key, we still have another exponentiation to do to test the private key. */
|
|
g_test_exp_mod_public = false;
|
|
|
|
/* Test the private key. */
|
|
TestRsaPrivateKey(g_test_exp_mod_key, g_test_exp_mod_slot, TestRsaKeyDoneHandler);
|
|
} else {
|
|
/* We're testing the private key, so validate the result. */
|
|
VerifyTestRsaKeyResult(g_test_exp_mod_key);
|
|
|
|
/* If the test passed, we can proceed to perform the intended exponentiation. */
|
|
if (LoadRsaKey(g_test_exp_mod_slot, g_test_exp_mod_key)) {
|
|
se::ModularExponentiateAsync(pkg1::RsaKeySlot_Temporary, GetModularExponentiateByStorageKeyAsyncArguments().GetMessage(), se::RsaSize, SecurityEngineDoneHandler);
|
|
} else {
|
|
/* The test failed, so end the asynchronous operation. */
|
|
g_exp_mod_result = SmcResult::InvalidArgument;
|
|
EndAsyncOperation();
|
|
}
|
|
}
|
|
}
|
|
|
|
SmcResult ModularExponentiateImpl(SmcArguments &args) {
|
|
/* Decode arguments. */
|
|
const uintptr_t msg_address = args.r[1];
|
|
const uintptr_t exp_address = args.r[2];
|
|
const uintptr_t mod_address = args.r[3];
|
|
const size_t exp_size = args.r[4];
|
|
|
|
/* Validate arguments. */
|
|
SMC_R_UNLESS(util::IsAligned(exp_size, sizeof(u32)), InvalidArgument);
|
|
SMC_R_UNLESS(exp_size <= se::RsaSize, InvalidArgument);
|
|
|
|
/* Copy the message and modulus from the user. */
|
|
alignas(8) u8 msg[se::RsaSize];
|
|
alignas(8) u8 exp[se::RsaSize];
|
|
alignas(8) u8 mod[se::RsaSize];
|
|
{
|
|
UserPageMapper mapper(msg_address);
|
|
SMC_R_UNLESS(mapper.Map(), InvalidArgument);
|
|
SMC_R_UNLESS(mapper.CopyFromUser(msg, msg_address, sizeof(msg)), InvalidArgument);
|
|
SMC_R_UNLESS(mapper.CopyFromUser(exp, exp_address, exp_size), InvalidArgument);
|
|
SMC_R_UNLESS(mapper.CopyFromUser(mod, mod_address, sizeof(mod)), InvalidArgument);
|
|
}
|
|
|
|
/* We're performing an operation, so set the result to busy. */
|
|
g_exp_mod_result = SmcResult::Busy;
|
|
|
|
/* Load the key into the temporary keyslot. */
|
|
se::SetRsaKey(pkg1::RsaKeySlot_Temporary, mod, sizeof(mod), exp, exp_size);
|
|
|
|
/* Begin the asynchronous exponentiation. */
|
|
se::ModularExponentiateAsync(pkg1::RsaKeySlot_Temporary, msg, sizeof(msg), SecurityEngineDoneHandler);
|
|
|
|
return SmcResult::Success;
|
|
}
|
|
|
|
SmcResult ModularExponentiateByStorageKeyImpl(SmcArguments &args) {
|
|
/* Decode arguments. */
|
|
const uintptr_t msg_address = args.r[1];
|
|
const uintptr_t mod_address = args.r[2];
|
|
const util::BitPack32 option = { static_cast<u32>(args.r[3]) };
|
|
|
|
const auto mode = GetTargetFirmware() >= TargetFirmware_5_0_0 ? option.Get<ModularExponentiateByStorageKeyOption::Mode>() : GetModeForImportRsaKey(ImportRsaKey_Lotus);
|
|
const auto reserved = option.Get<PrepareEsDeviceUniqueKeyOption::Reserved>();
|
|
|
|
/* Validate arguments. */
|
|
SMC_R_UNLESS(reserved == 0, InvalidArgument);
|
|
SMC_R_UNLESS(mode < ModularExponentiateByStorageKeyTableSize, InvalidArgument);
|
|
|
|
/* Convert the mode to an import key. */
|
|
const auto import_key = static_cast<ImportRsaKey>(ModularExponentiateByStorageKeyTable[mode]);
|
|
|
|
/* Copy the message and modulus from the user. */
|
|
alignas(8) u8 msg[se::RsaSize];
|
|
alignas(8) u8 mod[se::RsaSize];
|
|
{
|
|
UserPageMapper mapper(msg_address);
|
|
SMC_R_UNLESS(mapper.Map(), InvalidArgument);
|
|
SMC_R_UNLESS(mapper.CopyFromUser(msg, msg_address, sizeof(msg)), InvalidArgument);
|
|
SMC_R_UNLESS(mapper.CopyFromUser(mod, mod_address, sizeof(mod)), InvalidArgument);
|
|
}
|
|
|
|
/* We're performing an operation, so set the result to busy. */
|
|
g_exp_mod_result = SmcResult::Busy;
|
|
|
|
/* In the ideal case, the key pair is already verified. If it is, we can use it directly. */
|
|
if (LoadRsaKey(pkg1::RsaKeySlot_Temporary, import_key)) {
|
|
se::ModularExponentiateAsync(pkg1::RsaKeySlot_Temporary, msg, sizeof(msg), SecurityEngineDoneHandler);
|
|
} else {
|
|
/* Set the async arguments. */
|
|
GetModularExponentiateByStorageKeyAsyncArguments().Set(msg, sizeof(msg));
|
|
|
|
/* Test the rsa key. */
|
|
g_test_exp_mod_slot = pkg1::RsaKeySlot_Temporary;
|
|
g_test_exp_mod_key = import_key;
|
|
g_test_exp_mod_public = true;
|
|
|
|
TestRsaPublicKey(import_key, pkg1::RsaKeySlot_Temporary, mod, sizeof(mod), TestRsaKeyDoneHandler);
|
|
}
|
|
|
|
return SmcResult::Success;
|
|
}
|
|
|
|
SmcResult PrepareEsDeviceUniqueKeyImpl(SmcArguments &args) {
|
|
/* Decode arguments. */
|
|
u8 label_digest[crypto::Sha256Generator::HashSize];
|
|
|
|
const uintptr_t msg_address = args.r[1];
|
|
const uintptr_t mod_address = args.r[2];
|
|
std::memcpy(label_digest, std::addressof(args.r[3]), sizeof(label_digest));
|
|
const util::BitPack32 option = { static_cast<u32>(args.r[7]) };
|
|
|
|
const auto generation = GetTargetFirmware() >= TargetFirmware_3_0_0 ? std::max<int>(pkg1::KeyGeneration_1_0_0, option.Get<PrepareEsDeviceUniqueKeyOption::KeyGeneration>() - 1) : pkg1::KeyGeneration_1_0_0;
|
|
const auto type = option.Get<PrepareEsDeviceUniqueKeyOption::Type>();
|
|
const auto reserved = option.Get<PrepareEsDeviceUniqueKeyOption::Reserved>();
|
|
|
|
/* Validate arguments. */
|
|
SMC_R_UNLESS(reserved == 0, InvalidArgument);
|
|
SMC_R_UNLESS(pkg1::IsValidKeyGeneration(generation), InvalidArgument);
|
|
SMC_R_UNLESS(generation <= GetKeyGeneration(), InvalidArgument);
|
|
SMC_R_UNLESS(type < EsCommonKeyType_Count, InvalidArgument);
|
|
|
|
/* Copy the message and modulus from the user. */
|
|
alignas(8) u8 msg[se::RsaSize];
|
|
alignas(8) u8 mod[se::RsaSize];
|
|
{
|
|
UserPageMapper mapper(msg_address);
|
|
SMC_R_UNLESS(mapper.Map(), InvalidArgument);
|
|
SMC_R_UNLESS(mapper.CopyFromUser(msg, msg_address, sizeof(msg)), InvalidArgument);
|
|
SMC_R_UNLESS(mapper.CopyFromUser(mod, mod_address, sizeof(mod)), InvalidArgument);
|
|
}
|
|
|
|
/* We're performing an operation, so set the result to busy. */
|
|
g_exp_mod_result = SmcResult::Busy;
|
|
|
|
/* Set the async arguments. */
|
|
GetPrepareEsDeviceUniqueKeyAsyncArguments().Set(generation, type, label_digest);
|
|
|
|
/* Load the es drm key into the security engine. */
|
|
SMC_R_UNLESS(LoadRsaKey(pkg1::RsaKeySlot_Temporary, ImportRsaKey_EsDrmCert), NotInitialized);
|
|
|
|
/* Trigger the asynchronous modular exponentiation. */
|
|
se::ModularExponentiateAsync(pkg1::RsaKeySlot_Temporary, msg, sizeof(msg), SecurityEngineDoneHandler);
|
|
|
|
return SmcResult::Success;
|
|
}
|
|
|
|
SmcResult GetModularExponentiateResult(void *dst, size_t dst_size) {
|
|
/* Validate state. */
|
|
SMC_R_TRY(g_exp_mod_result);
|
|
SMC_R_UNLESS(dst_size == se::RsaSize, InvalidArgument);
|
|
|
|
/* We want to relinquish our security engine lock at the end of scope. */
|
|
ON_SCOPE_EXIT { UnlockSecurityEngine(); };
|
|
|
|
/* Get the result of the exponentiation. */
|
|
se::GetRsaResult(dst, se::RsaSize);
|
|
|
|
return SmcResult::Success;
|
|
}
|
|
|
|
SmcResult GetPrepareEsDeviceUniqueKeyResult(void *dst, size_t dst_size) {
|
|
/* Declare variables. */
|
|
u8 key_source[se::AesBlockSize];
|
|
u8 key[se::AesBlockSize];
|
|
u8 access_key[se::AesBlockSize];
|
|
|
|
/* Validate state. */
|
|
SMC_R_TRY(g_exp_mod_result);
|
|
SMC_R_UNLESS(dst_size == sizeof(access_key), InvalidArgument);
|
|
|
|
/* We want to relinquish our security engine lock at the end of scope. */
|
|
ON_SCOPE_EXIT { UnlockSecurityEngine(); };
|
|
|
|
/* Get the async args. */
|
|
const auto &async_args = GetPrepareEsDeviceUniqueKeyAsyncArguments();
|
|
|
|
/* Get the exponentiation output. */
|
|
alignas(8) u8 msg[se::RsaSize];
|
|
se::GetRsaResult(msg, sizeof(msg));
|
|
|
|
/* Decode the key. */
|
|
{
|
|
/* Get the label digest. */
|
|
u8 label_digest[crypto::Sha256Generator::HashSize];
|
|
async_args.GetLabelDigest(label_digest);
|
|
|
|
/* Decode the key source. */
|
|
const size_t key_source_size = se::DecodeRsaOaepSha256(key_source, sizeof(key_source), msg, sizeof(msg), label_digest, sizeof(label_digest));
|
|
SMC_R_UNLESS(key_source_size == sizeof(key_source), InvalidArgument);
|
|
}
|
|
|
|
/* Decrypt the key. */
|
|
DecryptWithEsCommonKey(key, sizeof(key), key_source, sizeof(key_source), async_args.GetCommonKeyType(), async_args.GetKeyGeneration());
|
|
PrepareEsAesKey(access_key, sizeof(access_key), key, sizeof(key));
|
|
|
|
/* Copy the access key to output. */
|
|
std::memcpy(dst, access_key, sizeof(access_key));
|
|
|
|
return SmcResult::Success;
|
|
}
|
|
|
|
}
|
|
|
|
SmcResult SmcModularExponentiate(SmcArguments &args) {
|
|
return LockSecurityEngineAndInvokeAsync(args, ModularExponentiateImpl, GetModularExponentiateResult);
|
|
}
|
|
|
|
SmcResult SmcModularExponentiateByStorageKey(SmcArguments &args) {
|
|
return LockSecurityEngineAndInvokeAsync(args, ModularExponentiateByStorageKeyImpl, GetModularExponentiateResult);
|
|
}
|
|
|
|
SmcResult SmcPrepareEsDeviceUniqueKey(SmcArguments &args) {
|
|
return LockSecurityEngineAndInvokeAsync(args, PrepareEsDeviceUniqueKeyImpl, GetPrepareEsDeviceUniqueKeyResult);
|
|
}
|
|
|
|
}
|