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_KEY_H_ 18 #define SYSTEM_KEYMASTER_TRIPLE_DES_KEY_H_ 19 20 #include <utility> 21 22 #include <openssl/des.h> 23 24 #include "symmetric_key.h" 25 26 namespace keymaster { 27 28 class TripleDesKeyFactory : public SymmetricKeyFactory { 29 public: TripleDesKeyFactory(const SoftwareKeyBlobMaker & blob_maker,const RandomSource & random_source)30 explicit TripleDesKeyFactory(const SoftwareKeyBlobMaker& blob_maker, 31 const RandomSource& random_source) 32 : SymmetricKeyFactory(blob_maker, random_source) {} 33 registry_key()34 keymaster_algorithm_t registry_key() const { return KM_ALGORITHM_TRIPLE_DES; } 35 36 keymaster_error_t LoadKey(KeymasterKeyBlob&& key_material, 37 const AuthorizationSet& additional_params, 38 AuthorizationSet&& hw_enforced, AuthorizationSet&& sw_enforced, 39 UniquePtr<Key>* key) const override; 40 41 OperationFactory* GetOperationFactory(keymaster_purpose_t purpose) const override; 42 43 private: key_size_supported(size_t key_size_bits)44 bool key_size_supported(size_t key_size_bits) const override { 45 return key_size_bits == 112 || key_size_bits == 168; 46 } key_size_bytes(size_t key_size_bits)47 size_t key_size_bytes(size_t key_size_bits) const override { return key_size_bits / 7; } key_size_bits(size_t key_size_bytes)48 size_t key_size_bits(size_t key_size_bytes) const override { return key_size_bytes * 7; } 49 50 keymaster_error_t validate_algorithm_specific_new_key_params( 51 const AuthorizationSet& key_description) const override; 52 }; 53 54 class TripleDesKey : public SymmetricKey { 55 public: TripleDesKey(KeymasterKeyBlob && key_material,AuthorizationSet && hw_enforced,AuthorizationSet && sw_enforced,const KeyFactory * key_factory)56 TripleDesKey(KeymasterKeyBlob&& key_material, AuthorizationSet&& hw_enforced, 57 AuthorizationSet&& sw_enforced, const KeyFactory* key_factory) 58 : SymmetricKey(std::move(key_material), std::move(hw_enforced), std::move(sw_enforced), 59 key_factory) {} 60 }; 61 62 } // namespace keymaster 63 64 #endif // SYSTEM_KEYMASTER_TRIPLE_DES_KEY_H_ 65