| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #define LOG_TAG "KeystoreOperation" |
| |
| #include "operation_proto_handler.h" |
| |
| #include <android/os/DropBoxManager.h> |
| #include <google/protobuf/message_lite.h> |
| #include <keymasterV4_0/Keymaster.h> |
| #include <keystore/keymaster_types.h> |
| #include <keystore/keystore_hidl_support.h> |
| #include <utils/String16.h> |
| #include <utils/StrongPointer.h> |
| |
| using namespace std::chrono; |
| |
| namespace keystore { |
| |
| constexpr auto kCollectionTime = 1h; |
| |
| void determinePurpose(KeyPurpose purpose, OperationConfig* operationConfig) { |
| switch (purpose) { |
| case KeyPurpose::VERIFY: |
| operationConfig->set_purpose("verify"); |
| break; |
| case KeyPurpose::ENCRYPT: |
| operationConfig->set_purpose("encrypt"); |
| break; |
| case KeyPurpose::SIGN: |
| operationConfig->set_purpose("sign"); |
| break; |
| case KeyPurpose::DECRYPT: |
| operationConfig->set_purpose("decrypt"); |
| break; |
| case KeyPurpose::WRAP_KEY: |
| operationConfig->set_purpose("wrap"); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| void checkKeyCharacteristics(const hidl_vec<KeyParameter>& characteristics, |
| OperationConfig* operationConfig) { |
| for (auto& opParam : characteristics) { |
| switch (opParam.tag) { |
| case Tag::ALGORITHM: |
| operationConfig->set_algorithm(toString(accessTagValue(TAG_ALGORITHM, opParam))); |
| break; |
| case Tag::KEY_SIZE: |
| operationConfig->set_key_size(accessTagValue(TAG_KEY_SIZE, opParam)); |
| break; |
| case Tag::EC_CURVE: |
| operationConfig->set_ec_curve(toString(accessTagValue(TAG_EC_CURVE, opParam))); |
| break; |
| case Tag::AUTH_TIMEOUT: |
| operationConfig->set_user_auth_key_timeout(accessTagValue(TAG_AUTH_TIMEOUT, opParam)); |
| break; |
| case Tag::ORIGIN: |
| operationConfig->set_origin(toString(accessTagValue(TAG_ORIGIN, opParam))); |
| break; |
| case Tag::BLOB_USAGE_REQUIREMENTS: |
| operationConfig->set_key_blob_usage_reqs( |
| toString(accessTagValue(TAG_BLOB_USAGE_REQUIREMENTS, opParam))); |
| break; |
| case Tag::USER_AUTH_TYPE: |
| operationConfig->set_user_auth_type( |
| toString(accessTagValue(TAG_USER_AUTH_TYPE, opParam))); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| void checkOpCharacteristics(const hidl_vec<KeyParameter>& characteristics, |
| OperationConfig* operationConfig) { |
| for (auto& opParam : characteristics) { |
| switch (opParam.tag) { |
| case Tag::BLOCK_MODE: |
| operationConfig->set_block_mode(toString(accessTagValue(TAG_BLOCK_MODE, opParam))); |
| break; |
| case Tag::PADDING: |
| operationConfig->set_padding(toString(accessTagValue(TAG_PADDING, opParam))); |
| break; |
| case Tag::DIGEST: |
| operationConfig->set_digest(toString(accessTagValue(TAG_DIGEST, opParam))); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| void OperationProtoHandler::uploadOpAsProto(Operation& op, bool wasOpSuccessful) { |
| std::lock_guard<std::mutex> lock(op_upload_mutex); |
| OperationConfig operationConfig; |
| determinePurpose(op.purpose, &operationConfig); |
| checkKeyCharacteristics(op.characteristics.softwareEnforced, &operationConfig); |
| checkKeyCharacteristics(op.characteristics.hardwareEnforced, &operationConfig); |
| checkOpCharacteristics(op.params, &operationConfig); |
| operationConfig.set_was_op_successful(wasOpSuccessful); |
| // Only bother with counting an hour out when an operation entry is actually |
| // added |
| if (protoMap.empty()) { |
| start_time = std::chrono::steady_clock::now(); |
| } |
| auto cur_time = std::chrono::steady_clock::now(); |
| |
| // Add operations to a map within the time duration of an hour. Deduplicate |
| // repeated ops by incrementing the counter of the original one stored and |
| // discarding the new one. |
| protoMap[operationConfig.SerializeAsString()]++; |
| |
| if (cur_time - start_time >= kCollectionTime) { |
| // Iterate through the unordered map and dump all the operation protos |
| // accumulated over the hour into the holding list proto after setting |
| // their counts. |
| OperationConfigEvents opConfigEvents; |
| for (auto elem : protoMap) { |
| OperationConfigEvent* event = opConfigEvents.add_op_config_events(); |
| event->mutable_op_config()->ParseFromString(elem.first); |
| event->set_count(elem.second); |
| } |
| android::sp<android::os::DropBoxManager> dropbox(new android::os::DropBoxManager); |
| size_t size = opConfigEvents.ByteSize(); |
| auto data = std::make_unique<uint8_t[]>(size); |
| opConfigEvents.SerializeWithCachedSizesToArray(data.get()); |
| dropbox->addData(android::String16("keymaster"), data.get(), size, 0); |
| protoMap.clear(); |
| } |
| } |
| |
| } // namespace keystore |