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exo2: implement SmcPrepareEsDeviceUniqueKey, SmcPrepareEsCommonTitleKey, SmcLoadPreparedAesKey
This commit is contained in:
Michael Scire
SciresM
parent
985e97cf78
commit
ccba70abfe
13 changed files with 461 additions and 50 deletions
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@ -155,6 +155,15 @@ namespace ams::secmon::smc {
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0xE2, 0xD6, 0xB8, 0x7A, 0x11, 0x9C, 0xB8, 0x80, 0xE8, 0x22, 0x88, 0x8A, 0x46, 0xFB, 0xA1, 0x95
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};
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constexpr const u8 EsCommonKeySources[EsCommonKeyType_Count][AesKeySize] = {
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[EsCommonKeyType_TitleKey] = { 0x1E, 0xDC, 0x7B, 0x3B, 0x60, 0xE6, 0xB4, 0xD8, 0x78, 0xB8, 0x17, 0x15, 0x98, 0x5E, 0x62, 0x9B },
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[EsCommonKeyType_ArchiveKey] = { 0x3B, 0x78, 0xF2, 0x61, 0x0F, 0x9D, 0x5A, 0xE2, 0x7B, 0x4E, 0x45, 0xAF, 0xCB, 0x0B, 0x67, 0x4D },
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};
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constexpr const u8 EsSealKeySource[AesKeySize] = {
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0xCB, 0xB7, 0x6E, 0x38, 0xA1, 0xCB, 0x77, 0x0F, 0xB2, 0xA5, 0xB2, 0x9D, 0xD8, 0x56, 0x9F, 0x76
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};
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constexpr const u8 SecureDataSource[AesKeySize] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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@ -463,6 +472,51 @@ namespace ams::secmon::smc {
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return SmcResult::Success;
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}
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SmcResult LoadPreparedAesKeyImpl(SmcArguments &args) {
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/* Decode arguments. */
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u8 access_key[AesKeySize];
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const int slot = args.r[1];
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std::memcpy(access_key, std::addressof(args.r[2]), sizeof(access_key));
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/* Validate arguments. */
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SMC_R_UNLESS(pkg1::IsUserAesKeySlot(slot), InvalidArgument);
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/* Derive the seal key. */
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se::SetEncryptedAesKey128(pkg1::AesKeySlot_Smc, pkg1::AesKeySlot_RandomForUserWrap, EsSealKeySource, sizeof(EsSealKeySource));
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/* Unseal the key. */
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se::SetEncryptedAesKey128(slot, pkg1::AesKeySlot_Smc, access_key, sizeof(access_key));
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return SmcResult::Success;
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}
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SmcResult PrepareEsCommonTitleKeyImpl(SmcArguments &args) {
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/* Declare variables. */
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u8 key_source[se::AesBlockSize];
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u8 key[se::AesBlockSize];
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u8 access_key[se::AesBlockSize];
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/* Decode arguments. */
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std::memcpy(key_source, std::addressof(args.r[1]), sizeof(key_source));
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const int generation = GetTargetFirmware() >= TargetFirmware_3_0_0 ? std::max(0, static_cast<int>(args.r[3]) - 1) : 0;
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/* Validate arguments. */
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SMC_R_UNLESS(pkg1::IsValidKeyGeneration(generation), InvalidArgument);
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SMC_R_UNLESS(generation <= GetKeyGeneration(), InvalidArgument);
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/* Derive the key. */
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DecryptWithEsCommonKey(key, sizeof(key), key_source, sizeof(key_source), EsCommonKeyType_TitleKey, generation);
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/* Prepare the aes key. */
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PrepareEsAesKey(access_key, sizeof(access_key), key, sizeof(key));
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/* Copy the access key to output. */
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std::memcpy(std::addressof(args.r[1]), access_key, sizeof(access_key));
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return SmcResult::Success;
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}
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SmcResult DecryptDeviceUniqueDataImpl(SmcArguments &args) {
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/* Decode arguments. */
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u8 access_key[se::AesBlockSize];
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@ -530,6 +584,7 @@ namespace ams::secmon::smc {
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case DeviceUniqueData_ImportEsClientCertKey:
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ImportRsaKeyExponent(ConvertToImportRsaKey(mode), work_buffer, se::RsaSize);
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ImportRsaKeyModulusProvisionally(ConvertToImportRsaKey(mode), work_buffer + se::RsaSize, se::RsaSize);
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CommitRsaKeyModulus(ConvertToImportRsaKey(mode));
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break;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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@ -579,8 +634,11 @@ namespace ams::secmon::smc {
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}
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SmcResult SmcLoadPreparedAesKey(SmcArguments &args) {
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/* TODO */
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return SmcResult::NotImplemented;
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return LockSecurityEngineAndInvoke(args, LoadPreparedAesKeyImpl);
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}
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SmcResult SmcPrepareEsCommonTitleKey(SmcArguments &args) {
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return LockSecurityEngineAndInvoke(args, PrepareEsCommonTitleKeyImpl);
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}
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/* Device unique data functionality. */
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@ -604,6 +662,35 @@ namespace ams::secmon::smc {
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return SmcResult::NotImplemented;
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}
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/* Es encryption utilities. */
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void DecryptWithEsCommonKey(void *dst, size_t dst_size, const void *src, size_t src_size, EsCommonKeyType type, int generation) {
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/* Validate pre-conditions. */
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AMS_ABORT_UNLESS(dst_size == AesKeySize);
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AMS_ABORT_UNLESS(src_size == AesKeySize);
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AMS_ABORT_UNLESS(0 <= type && type < EsCommonKeyType_Count);
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/* Prepare the master key for the generation. */
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const int slot = PrepareMasterKey(generation);
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/* Derive the es common key. */
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se::SetEncryptedAesKey128(pkg1::AesKeySlot_Smc, slot, EsCommonKeySources[type], AesKeySize);
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/* Decrypt the input using the common key. */
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se::DecryptAes128(dst, dst_size, pkg1::AesKeySlot_Smc, src, src_size);
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}
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void PrepareEsAesKey(void *dst, size_t dst_size, const void *src, size_t src_size) {
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/* Validate pre-conditions. */
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AMS_ABORT_UNLESS(dst_size == AesKeySize);
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AMS_ABORT_UNLESS(src_size == AesKeySize);
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/* Derive the seal key. */
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se::SetEncryptedAesKey128(pkg1::AesKeySlot_Smc, pkg1::AesKeySlot_RandomForUserWrap, EsSealKeySource, sizeof(EsSealKeySource));
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/* Seal the key. */
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se::EncryptAes128(dst, dst_size, pkg1::AesKeySlot_Smc, src, src_size);
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}
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/* 'Tis the last rose of summer, / Left blooming alone; */
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/* Oh! who would inhabit / This bleak world alone? */
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SmcResult SmcGetSecureData(SmcArguments &args) {
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@ -19,6 +19,13 @@
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namespace ams::secmon::smc {
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enum EsCommonKeyType {
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EsCommonKeyType_TitleKey = 0,
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EsCommonKeyType_ArchiveKey = 1,
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EsCommonKeyType_Count,
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};
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/* General Aes functionality. */
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SmcResult SmcGenerateAesKek(SmcArguments &args);
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SmcResult SmcLoadAesKey(SmcArguments &args);
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@ -26,6 +33,7 @@ namespace ams::secmon::smc {
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SmcResult SmcGenerateSpecificAesKey(SmcArguments &args);
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SmcResult SmcComputeCmac(SmcArguments &args);
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SmcResult SmcLoadPreparedAesKey(SmcArguments &args);
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SmcResult SmcPrepareEsCommonTitleKey(SmcArguments &args);
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/* Device unique data functionality. */
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SmcResult SmcDecryptDeviceUniqueData(SmcArguments &args);
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@ -35,6 +43,10 @@ namespace ams::secmon::smc {
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SmcResult SmcDecryptAndImportEsDeviceKey(SmcArguments &args);
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SmcResult SmcDecryptAndImportLotusKey(SmcArguments &args);
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/* Es encryption utilities. */
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void DecryptWithEsCommonKey(void *dst, size_t dst_size, const void *src, size_t src_size, EsCommonKeyType type, int generation);
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void PrepareEsAesKey(void *dst, size_t dst_size, const void *src, size_t src_size);
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/* The last rose of summer. */
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SmcResult SmcGetSecureData(SmcArguments &args);
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@ -1,32 +0,0 @@
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/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <exosphere.hpp>
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#include "../secmon_error.hpp"
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#include "secmon_smc_es.hpp"
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namespace ams::secmon::smc {
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SmcResult SmcPrepareEsDeviceUniqueKey(SmcArguments &args) {
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/* TODO */
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return SmcResult::NotImplemented;
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}
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SmcResult SmcPrepareEsCommonKey(SmcArguments &args) {
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/* TODO */
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return SmcResult::NotImplemented;
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}
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}
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@ -1,32 +0,0 @@
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/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <exosphere.hpp>
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#include "secmon_smc_common.hpp"
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namespace ams::secmon::smc {
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enum EsKeyType {
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EsKeyType_TitleKey = 0,
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EsKeyType_ArchiveKey = 1,
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EsKeyType_Count = 2,
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};
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SmcResult SmcPrepareEsDeviceUniqueKey(SmcArguments &args);
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SmcResult SmcPrepareEsCommonKey(SmcArguments &args);
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}
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@ -22,7 +22,6 @@
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#include "secmon_smc_carveout.hpp"
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#include "secmon_smc_device_unique_data.hpp"
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#include "secmon_smc_error.hpp"
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#include "secmon_smc_es.hpp"
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#include "secmon_smc_info.hpp"
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#include "secmon_smc_memory_access.hpp"
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#include "secmon_smc_power_management.hpp"
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@ -120,7 +119,7 @@ namespace ams::secmon::smc {
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{ 0xC300060F, Restriction_DeviceUniqueDataNotAllowed, SmcModularExponentiateByStorageKey },
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{ 0xC3000610, Restriction_SafeModeNotAllowed, SmcPrepareEsDeviceUniqueKey },
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{ 0xC3000011, Restriction_SafeModeNotAllowed, SmcLoadPreparedAesKey },
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{ 0xC3000012, Restriction_SafeModeNotAllowed, SmcPrepareEsCommonKey }
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{ 0xC3000012, Restriction_SafeModeNotAllowed, SmcPrepareEsCommonTitleKey }
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};
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constinit HandlerInfo g_kern_handlers[] = {
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@ -233,8 +232,8 @@ namespace ams::secmon::smc {
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constinit std::atomic<int> g_logged = 0;
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constexpr int LogMin = 0x4000;
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constexpr int LogMax = 0x4200;
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constexpr int LogMin = 0x1000000;
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constexpr int LogMax = 0x1000000;
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constexpr size_t LogBufSize = 0x5000;
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@ -15,10 +15,158 @@
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*/
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#include <exosphere.hpp>
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#include "../secmon_error.hpp"
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#include "../secmon_key_storage.hpp"
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#include "secmon_smc_aes.hpp"
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#include "secmon_smc_rsa.hpp"
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#include "secmon_smc_se_lock.hpp"
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#include "secmon_page_mapper.hpp"
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namespace ams::secmon::smc {
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namespace {
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struct PrepareEsDeviceUniqueKeyOption {
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using KeyGeneration = util::BitPack32::Field<0, 6, int>;
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using Type = util::BitPack32::Field<6, 1, EsCommonKeyType>;
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using Reserved = util::BitPack32::Field<7, 25, u32>;
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};
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class PrepareEsDeviceUniqueKeyAsyncArguments {
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private:
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int generation;
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EsCommonKeyType type;
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u8 label_digest[crypto::Sha256Generator::HashSize];
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public:
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void Set(int gen, EsCommonKeyType t, const u8 ld[crypto::Sha256Generator::HashSize]) {
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this->generation = gen;
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this->type = t;
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std::memcpy(this->label_digest, ld, sizeof(this->label_digest));
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}
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int GetKeyGeneration() const { return this->generation; }
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EsCommonKeyType GetCommonKeyType() const { return this->type; }
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void GetLabelDigest(u8 dst[crypto::Sha256Generator::HashSize]) const { std::memcpy(dst, this->label_digest, sizeof(this->label_digest)); }
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};
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class ModularExponentiateByStorageKeyAsyncArguments {
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private:
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u8 msg[se::RsaSize];
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public:
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void Set(const void *m, size_t m_size) {
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std::memcpy(this->msg, m, sizeof(this->msg));
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}
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void GetMessage(void *dst, size_t dst_size) const { std::memcpy(dst, this->msg, sizeof(this->msg)); }
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};
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constinit bool g_exp_mod_completed = false;
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constinit union {
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ModularExponentiateByStorageKeyAsyncArguments modular_exponentiate_by_storage_key;
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PrepareEsDeviceUniqueKeyAsyncArguments prepare_es_device_unique_key;
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} g_async_arguments;
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ALWAYS_INLINE ModularExponentiateByStorageKeyAsyncArguments &GetModularExponentiateByStorageKeyAsyncArguments() {
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return g_async_arguments.modular_exponentiate_by_storage_key;
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}
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ALWAYS_INLINE PrepareEsDeviceUniqueKeyAsyncArguments &GetPrepareEsDeviceUniqueKeyAsyncArguments() {
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return g_async_arguments.prepare_es_device_unique_key;
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}
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void SecurityEngineDoneHandler() {
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/* End the asynchronous operation. */
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g_exp_mod_completed = true;
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EndAsyncOperation();
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}
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SmcResult PrepareEsDeviceUniqueKeyImpl(SmcArguments &args) {
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/* Decode arguments. */
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u8 label_digest[crypto::Sha256Generator::HashSize];
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const uintptr_t msg_address = args.r[1];
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const uintptr_t mod_address = args.r[2];
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std::memcpy(label_digest, std::addressof(args.r[3]), sizeof(label_digest));
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const util::BitPack32 option = { static_cast<u32>(args.r[7]) };
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const auto generation = GetTargetFirmware() >= TargetFirmware_3_0_0 ? std::max(0, option.Get<PrepareEsDeviceUniqueKeyOption::KeyGeneration>() - 1) : 0;
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const auto type = option.Get<PrepareEsDeviceUniqueKeyOption::Type>();
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const auto reserved = option.Get<PrepareEsDeviceUniqueKeyOption::Reserved>();
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/* Validate arguments. */
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SMC_R_UNLESS(reserved == 0, InvalidArgument);
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SMC_R_UNLESS(pkg1::IsValidKeyGeneration(generation), InvalidArgument);
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SMC_R_UNLESS(generation <= GetKeyGeneration(), InvalidArgument);
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SMC_R_UNLESS(type < EsCommonKeyType_Count, InvalidArgument);
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/* Copy the message and modulus from the user. */
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alignas(8) u8 msg[se::RsaSize];
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alignas(8) u8 mod[se::RsaSize];
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{
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UserPageMapper mapper(msg_address);
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SMC_R_UNLESS(mapper.Map(), InvalidArgument);
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SMC_R_UNLESS(mapper.CopyFromUser(msg, msg_address, sizeof(msg)), InvalidArgument);
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SMC_R_UNLESS(mapper.CopyFromUser(mod, mod_address, sizeof(mod)), InvalidArgument);
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}
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/* We're performing an operation, so the operation is not completed. */
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g_exp_mod_completed = false;
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/* Set the async arguments. */
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GetPrepareEsDeviceUniqueKeyAsyncArguments().Set(generation, type, label_digest);
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/* Load the es drm key into the security engine. */
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SMC_R_UNLESS(LoadRsaKey(pkg1::RsaKeySlot_Temporary, ImportRsaKey_EsDrmCert), NotInitialized);
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/* Trigger the asynchronous modular exponentiation. */
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se::ModularExponentiateAsync(pkg1::RsaKeySlot_Temporary, msg, sizeof(msg), SecurityEngineDoneHandler);
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return SmcResult::Success;
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}
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SmcResult GetPrepareEsDeviceUniqueKeyResult(void *dst, size_t dst_size) {
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/* Declare variables. */
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u8 key_source[se::AesBlockSize];
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u8 key[se::AesBlockSize];
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u8 access_key[se::AesBlockSize];
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/* Validate state. */
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SMC_R_UNLESS(g_exp_mod_completed, Busy);
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SMC_R_UNLESS(dst_size == sizeof(access_key), InvalidArgument);
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/* We want to relinquish our security engine lock at the end of scope. */
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ON_SCOPE_EXIT { UnlockSecurityEngine(); };
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/* Get the async args. */
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const auto &async_args = GetPrepareEsDeviceUniqueKeyAsyncArguments();
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/* Get the exponentiation output. */
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alignas(8) u8 msg[se::RsaSize];
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se::GetRsaResult(msg, sizeof(msg));
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/* Decode the key. */
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{
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/* Get the label digest. */
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u8 label_digest[crypto::Sha256Generator::HashSize];
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async_args.GetLabelDigest(label_digest);
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/* Decode the key source. */
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const size_t key_source_size = se::DecodeRsaOaepSha256(key_source, sizeof(key_source), msg, sizeof(msg), label_digest, sizeof(label_digest));
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SMC_R_UNLESS(key_source_size == sizeof(key_source), InvalidArgument);
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}
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/* Decrypt the key. */
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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) {
|
||||
/* TODO */
|
||||
return SmcResult::NotImplemented;
|
||||
|
|
@ -29,4 +177,8 @@ namespace ams::secmon::smc {
|
|||
return SmcResult::NotImplemented;
|
||||
}
|
||||
|
||||
SmcResult SmcPrepareEsDeviceUniqueKey(SmcArguments &args) {
|
||||
return LockSecurityEngineAndInvokeAsync(args, PrepareEsDeviceUniqueKeyImpl, GetPrepareEsDeviceUniqueKeyResult);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -22,4 +22,6 @@ namespace ams::secmon::smc {
|
|||
SmcResult SmcModularExponentiate(SmcArguments &args);
|
||||
SmcResult SmcModularExponentiateByStorageKey(SmcArguments &args);
|
||||
|
||||
SmcResult SmcPrepareEsDeviceUniqueKey(SmcArguments &args);
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue