1 /* 2 * Copyright 2018 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 #ifndef SYSTEM_KEYMASTER_TRIPLE_DES_OPERATION_H_ 18 #define SYSTEM_KEYMASTER_TRIPLE_DES_OPERATION_H_ 19 20 #include <openssl/des.h> 21 22 #include "block_cipher_operation.h" 23 24 namespace keymaster { 25 26 class TripleDesEvpCipherDescription : public EvpCipherDescription { 27 public: algorithm()28 keymaster_algorithm_t algorithm() const override { return KM_ALGORITHM_TRIPLE_DES; } 29 30 const keymaster_block_mode_t* SupportedBlockModes(size_t* block_mode_count) const override; 31 32 const EVP_CIPHER* GetCipherInstance(size_t key_size, keymaster_block_mode_t block_mode, 33 keymaster_error_t* error) const override; 34 block_size_bytes()35 size_t block_size_bytes() const override { return 8 /* DES_BLOCK_SIZE */; } 36 }; 37 38 class TripleDesOperationFactory : public BlockCipherOperationFactory { 39 public: TripleDesOperationFactory(keymaster_purpose_t purpose)40 explicit TripleDesOperationFactory(keymaster_purpose_t purpose) 41 : BlockCipherOperationFactory(purpose) {} 42 const EvpCipherDescription& GetCipherDescription() const override; 43 }; 44 45 } // namespace keymaster 46 47 #endif // SYSTEM_KEYMASTER_TRIPLE_DES_OPERATION_H_ 48