| /* |
| * Copyright 2014 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. |
| */ |
| |
| #ifndef SYSTEM_KEYMASTER_GOOGLE_SOFT_KEYMASTER_H_ |
| #define SYSTEM_KEYMASTER_GOOGLE_SOFT_KEYMASTER_H_ |
| |
| #include <keymaster/google_keymaster.h> |
| |
| #include <openssl/rand.h> |
| |
| #include "openssl_err.h" |
| |
| namespace keymaster { |
| |
| class GoogleSoftKeymaster : public GoogleKeymaster { |
| public: |
| GoogleSoftKeymaster(size_t operation_table_size) : GoogleKeymaster(operation_table_size) { |
| root_of_trust.tag = KM_TAG_ROOT_OF_TRUST; |
| root_of_trust.blob.data = reinterpret_cast<const uint8_t*>("SW"); |
| root_of_trust.blob.data_length = 2; |
| } |
| bool is_enforced(keymaster_tag_t /* tag */) { return false; } |
| keymaster_key_origin_t origin() { return KM_ORIGIN_SOFTWARE; } |
| |
| keymaster_error_t AddRngEntropy(const AddEntropyRequest& request) { |
| RAND_seed(request.random_data.peek_read(), request.random_data.available_read()); |
| return KM_ERROR_OK; |
| } |
| |
| private: |
| static uint8_t master_key_[]; |
| |
| keymaster_key_blob_t MasterKey() { |
| keymaster_key_blob_t blob; |
| blob.key_material = master_key_; |
| blob.key_material_size = 16; |
| return blob; |
| } |
| |
| void GenerateNonce(uint8_t* nonce, size_t length) { |
| for (size_t i = 0; i < length; ++i) |
| nonce[i] = 0; |
| } |
| |
| keymaster_key_param_t RootOfTrustTag() { return root_of_trust; } |
| |
| keymaster_key_param_t root_of_trust; |
| }; |
| |
| uint8_t GoogleSoftKeymaster::master_key_[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| |
| } // namespace |
| |
| #endif // SYSTEM_KEYMASTER_GOOGLE_SOFT_KEYMASTER_H_ |