| /* |
| * 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_SYMMETRIC_KEY_H_ |
| #define SYSTEM_KEYMASTER_SYMMETRIC_KEY_H_ |
| |
| #include <keymaster/key_factory.h> |
| |
| #include "key.h" |
| |
| namespace keymaster { |
| |
| class SymmetricKey; |
| |
| class SymmetricKeyFactory : public KeyFactory { |
| public: |
| SymmetricKeyFactory(const KeymasterContext* context) : KeyFactory(context) {} |
| |
| keymaster_error_t GenerateKey(const AuthorizationSet& key_description, |
| KeymasterKeyBlob* key_blob, AuthorizationSet* hw_enforced, |
| AuthorizationSet* sw_enforced) const override; |
| keymaster_error_t ImportKey(const AuthorizationSet& key_description, |
| keymaster_key_format_t input_key_material_format, |
| const KeymasterKeyBlob& input_key_material, |
| KeymasterKeyBlob* output_key_blob, AuthorizationSet* hw_enforced, |
| AuthorizationSet* sw_enforced) const override; |
| |
| virtual const keymaster_key_format_t* SupportedImportFormats(size_t* format_count) const; |
| virtual const keymaster_key_format_t* SupportedExportFormats(size_t* format_count) const { |
| return NoFormats(format_count); |
| }; |
| |
| private: |
| virtual bool key_size_supported(size_t key_size_bits) const = 0; |
| virtual keymaster_error_t |
| validate_algorithm_specific_new_key_params(const AuthorizationSet& key_description) const = 0; |
| |
| const keymaster_key_format_t* NoFormats(size_t* format_count) const { |
| *format_count = 0; |
| return NULL; |
| } |
| }; |
| |
| class SymmetricKey : public Key { |
| public: |
| ~SymmetricKey(); |
| |
| virtual keymaster_error_t key_material(UniquePtr<uint8_t[]>* key_material, size_t* size) const; |
| virtual keymaster_error_t formatted_key_material(keymaster_key_format_t, UniquePtr<uint8_t[]>*, |
| size_t*) const { |
| return KM_ERROR_UNSUPPORTED_KEY_FORMAT; |
| } |
| |
| const uint8_t* key_data() const { return key_data_.get(); } |
| size_t key_data_size() const { return key_data_size_; } |
| |
| protected: |
| SymmetricKey(const KeymasterKeyBlob& key_material, const AuthorizationSet& hw_enforced, |
| const AuthorizationSet& sw_enforced, keymaster_error_t* error); |
| |
| private: |
| size_t key_data_size_; |
| UniquePtr<uint8_t[]> key_data_; |
| }; |
| |
| } // namespace keymaster |
| |
| #endif // SYSTEM_KEYMASTER_AES_KEY_H_ |