| /* |
| * 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_OPERATION_H_ |
| #define SYSTEM_KEYMASTER_OPERATION_H_ |
| |
| #include <assert.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| |
| #include <keymaster/google_keymaster_utils.h> |
| #include <hardware/keymaster_defs.h> |
| #include <keymaster/logger.h> |
| |
| #include "abstract_factory_registry.h" |
| |
| namespace keymaster { |
| |
| class AuthorizationSet; |
| class Key; |
| class Operation; |
| |
| class OperationFactory { |
| public: |
| virtual ~OperationFactory() {} |
| |
| // Required for registry |
| struct KeyType { |
| KeyType(keymaster_algorithm_t alg, keymaster_purpose_t purp) |
| : algorithm(alg), purpose(purp) {} |
| |
| keymaster_algorithm_t algorithm; |
| keymaster_purpose_t purpose; |
| |
| bool operator==(const KeyType& rhs) const { |
| return algorithm == rhs.algorithm && purpose == rhs.purpose; |
| } |
| }; |
| virtual KeyType registry_key() const = 0; |
| |
| // Factory methods |
| virtual Operation* CreateOperation(const Key& key, keymaster_error_t* error) = 0; |
| |
| // Informational methods. The returned arrays reference static memory and must not be |
| // deallocated or modified. |
| virtual const keymaster_padding_t* SupportedPaddingModes(size_t* padding_count) const { |
| *padding_count = 0; |
| return NULL; |
| } |
| virtual const keymaster_block_mode_t* SupportedBlockModes(size_t* block_mode_count) const { |
| *block_mode_count = 0; |
| return NULL; |
| } |
| virtual const keymaster_digest_t* SupportedDigests(size_t* digest_count) const { |
| *digest_count = 0; |
| return NULL; |
| } |
| |
| // Convenience methods |
| bool supported(keymaster_padding_t padding) const; |
| bool supported(keymaster_block_mode_t padding) const; |
| bool supported(keymaster_digest_t padding) const; |
| }; |
| |
| typedef AbstractFactoryRegistry<OperationFactory> OperationFactoryRegistry; |
| |
| /** |
| * Abstract base for all cryptographic operations. |
| */ |
| class Operation { |
| public: |
| Operation(keymaster_purpose_t purpose) : purpose_(purpose) {} |
| virtual ~Operation() {} |
| |
| keymaster_purpose_t purpose() const { return purpose_; } |
| |
| virtual keymaster_error_t Begin(const AuthorizationSet& input_params, |
| AuthorizationSet* output_params) = 0; |
| virtual keymaster_error_t Update(const AuthorizationSet& additional_params, const Buffer& input, |
| Buffer* output, size_t* input_consumed) = 0; |
| virtual keymaster_error_t Finish(const AuthorizationSet& /* additional_params */, |
| const Buffer& signature, Buffer* output) = 0; |
| virtual keymaster_error_t Abort() = 0; |
| |
| private: |
| const keymaster_purpose_t purpose_; |
| }; |
| |
| } // namespace keymaster |
| |
| #endif // SYSTEM_KEYMASTER_OPERATION_H_ |