1 // Copyright 2018 Google Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 /////////////////////////////////////////////////////////////////////////////// 16 17 #ifndef TINK_DAEAD_DETERMINISTIC_AEAD_WRAPPER_H_ 18 #define TINK_DAEAD_DETERMINISTIC_AEAD_WRAPPER_H_ 19 20 #include <memory> 21 22 #include "absl/strings/string_view.h" 23 #include "tink/deterministic_aead.h" 24 #include "tink/primitive_set.h" 25 #include "tink/primitive_wrapper.h" 26 #include "tink/util/statusor.h" 27 #include "proto/tink.pb.h" 28 29 namespace crypto { 30 namespace tink { 31 32 // Wraps a set of DeterministicAead-instances that correspond to a keyset, 33 // and combines them into a single DeterministicAead-primitive, that uses 34 // the provided instances, depending on the context: 35 // * DeterministicAead::EncryptDeterministically(...) uses the primary 36 // instance from the set 37 // * DeterministicAead::DecryptDeterministically(...) uses the instance 38 // that matches the ciphertext prefix. 39 class DeterministicAeadWrapper 40 : public PrimitiveWrapper<DeterministicAead, DeterministicAead> { 41 public: 42 // Returns a DeterministicAead-primitive that uses Daead-instances provided 43 // in 'daead_set', which must be non-NULL and must contain a primary instance. 44 crypto::tink::util::StatusOr<std::unique_ptr<DeterministicAead>> Wrap( 45 std::unique_ptr<PrimitiveSet<DeterministicAead>> primitive_set) 46 const override; 47 }; 48 49 } // namespace tink 50 } // namespace crypto 51 52 #endif // TINK_DAEAD_DETERMINISTIC_AEAD_WRAPPER_H_ 53