1 // Copyright 2019 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_STREAMINGAEAD_STREAMING_AEAD_WRAPPER_H_ 18 #define TINK_STREAMINGAEAD_STREAMING_AEAD_WRAPPER_H_ 19 20 #include <memory> 21 22 #include "absl/strings/string_view.h" 23 #include "tink/primitive_set.h" 24 #include "tink/primitive_wrapper.h" 25 #include "tink/streaming_aead.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 StreamingAead-instances that correspond to a keyset, 33 // and combines them into a single StreamingAead-primitive, that uses 34 // the provided instances, depending on the context: 35 // * StreamingAead::NewEncryptingStream(...) uses the primary instance 36 // from the set 37 // * StreamingAead::NewDecryptingStream(...) uses the instance that matches 38 // the ciphertext prefix. 39 class StreamingAeadWrapper 40 : public PrimitiveWrapper<StreamingAead, StreamingAead> { 41 public: 42 // Returns a StreamingAead-primitive that uses StreamingAead-instances 43 // provided in 'streaming_aead_set', which must be non-NULL and must contain 44 // a primary instance. 45 util::StatusOr<std::unique_ptr<StreamingAead>> Wrap( 46 std::unique_ptr<PrimitiveSet<StreamingAead>> streaming_aead_set) 47 const override; 48 }; 49 50 } // namespace tink 51 } // namespace crypto 52 53 #endif // TINK_STREAMINGAEAD_STREAMING_AEAD_WRAPPER_H_ 54