1 /* 2 * Copyright 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <keymaster/remote_provisioning_context.h> 20 21 #include "host/commands/secure_env/tpm_resource_manager.h" 22 #include "keymaster/cppcose/cppcose.h" 23 24 namespace cuttlefish { 25 26 /** 27 * TPM-backed implementation of the provisioning context. 28 */ 29 class TpmRemoteProvisioningContext 30 : public keymaster::RemoteProvisioningContext { 31 public: 32 TpmRemoteProvisioningContext(TpmResourceManager& resource_manager); 33 ~TpmRemoteProvisioningContext() override = default; 34 std::vector<uint8_t> DeriveBytesFromHbk(const std::string& context, 35 size_t numBytes) const override; 36 std::unique_ptr<cppbor::Map> CreateDeviceInfo() const override; 37 cppcose::ErrMsgOr<std::vector<uint8_t>> BuildProtectedDataPayload( 38 bool isTestMode, // 39 const std::vector<uint8_t>& macKey, // 40 const std::vector<uint8_t>& aad) const override; 41 std::optional<cppcose::HmacSha256> GenerateHmacSha256( 42 const cppcose::bytevec& input) const override; 43 std::pair<std::vector<uint8_t>, cppbor::Array> GenerateBcc( 44 bool testMode) const; 45 void SetSystemVersion(uint32_t os_version, uint32_t os_patchlevel); 46 void SetVendorPatchlevel(uint32_t vendor_patchlevel); 47 void SetBootPatchlevel(uint32_t boot_patchlevel); 48 void SetVerifiedBootInfo(std::string_view boot_state, 49 std::string_view bootloader_state, 50 const std::vector<uint8_t>& vbmeta_digest); 51 52 private: 53 std::vector<uint8_t> devicePrivKey_; 54 cppbor::Array bcc_; 55 TpmResourceManager& resource_manager_; 56 57 std::optional<uint32_t> os_version_; 58 std::optional<uint32_t> os_patchlevel_; 59 std::optional<uint32_t> vendor_patchlevel_; 60 std::optional<uint32_t> boot_patchlevel_; 61 std::optional<std::string> verified_boot_state_; 62 std::optional<std::string> bootloader_state_; 63 std::optional<std::vector<uint8_t>> vbmeta_digest_; 64 }; 65 66 } // namespace cuttlefish 67