1*e7b1675dSTing-Kang Chang // Copyright 2019 Google Inc. 2*e7b1675dSTing-Kang Chang // 3*e7b1675dSTing-Kang Chang // Licensed under the Apache License, Version 2.0 (the "License"); 4*e7b1675dSTing-Kang Chang // you may not use this file except in compliance with the License. 5*e7b1675dSTing-Kang Chang // You may obtain a copy of the License at 6*e7b1675dSTing-Kang Chang // 7*e7b1675dSTing-Kang Chang // http://www.apache.org/licenses/LICENSE-2.0 8*e7b1675dSTing-Kang Chang // 9*e7b1675dSTing-Kang Chang // Unless required by applicable law or agreed to in writing, software 10*e7b1675dSTing-Kang Chang // distributed under the License is distributed on an "AS IS" BASIS, 11*e7b1675dSTing-Kang Chang // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12*e7b1675dSTing-Kang Chang // See the License for the specific language governing permissions and 13*e7b1675dSTing-Kang Chang // limitations under the License. 14*e7b1675dSTing-Kang Chang // 15*e7b1675dSTing-Kang Chang /////////////////////////////////////////////////////////////////////////////// 16*e7b1675dSTing-Kang Chang 17*e7b1675dSTing-Kang Chang #ifndef TINK_STREAMINGAEAD_STREAMING_AEAD_WRAPPER_H_ 18*e7b1675dSTing-Kang Chang #define TINK_STREAMINGAEAD_STREAMING_AEAD_WRAPPER_H_ 19*e7b1675dSTing-Kang Chang 20*e7b1675dSTing-Kang Chang #include <memory> 21*e7b1675dSTing-Kang Chang 22*e7b1675dSTing-Kang Chang #include "absl/strings/string_view.h" 23*e7b1675dSTing-Kang Chang #include "tink/primitive_set.h" 24*e7b1675dSTing-Kang Chang #include "tink/primitive_wrapper.h" 25*e7b1675dSTing-Kang Chang #include "tink/streaming_aead.h" 26*e7b1675dSTing-Kang Chang #include "tink/util/statusor.h" 27*e7b1675dSTing-Kang Chang #include "proto/tink.pb.h" 28*e7b1675dSTing-Kang Chang 29*e7b1675dSTing-Kang Chang namespace crypto { 30*e7b1675dSTing-Kang Chang namespace tink { 31*e7b1675dSTing-Kang Chang 32*e7b1675dSTing-Kang Chang // Wraps a set of StreamingAead-instances that correspond to a keyset, 33*e7b1675dSTing-Kang Chang // and combines them into a single StreamingAead-primitive, that uses 34*e7b1675dSTing-Kang Chang // the provided instances, depending on the context: 35*e7b1675dSTing-Kang Chang // * StreamingAead::NewEncryptingStream(...) uses the primary instance 36*e7b1675dSTing-Kang Chang // from the set 37*e7b1675dSTing-Kang Chang // * StreamingAead::NewDecryptingStream(...) uses the instance that matches 38*e7b1675dSTing-Kang Chang // the ciphertext prefix. 39*e7b1675dSTing-Kang Chang class StreamingAeadWrapper 40*e7b1675dSTing-Kang Chang : public PrimitiveWrapper<StreamingAead, StreamingAead> { 41*e7b1675dSTing-Kang Chang public: 42*e7b1675dSTing-Kang Chang // Returns a StreamingAead-primitive that uses StreamingAead-instances 43*e7b1675dSTing-Kang Chang // provided in 'streaming_aead_set', which must be non-NULL and must contain 44*e7b1675dSTing-Kang Chang // a primary instance. 45*e7b1675dSTing-Kang Chang util::StatusOr<std::unique_ptr<StreamingAead>> Wrap( 46*e7b1675dSTing-Kang Chang std::unique_ptr<PrimitiveSet<StreamingAead>> streaming_aead_set) 47*e7b1675dSTing-Kang Chang const override; 48*e7b1675dSTing-Kang Chang }; 49*e7b1675dSTing-Kang Chang 50*e7b1675dSTing-Kang Chang } // namespace tink 51*e7b1675dSTing-Kang Chang } // namespace crypto 52*e7b1675dSTing-Kang Chang 53*e7b1675dSTing-Kang Chang #endif // TINK_STREAMINGAEAD_STREAMING_AEAD_WRAPPER_H_ 54