1 // Copyright 2020 Google LLC 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_SUBTLE_PRF_STREAMING_PRF_WRAPPER_H_ 18 #define TINK_SUBTLE_PRF_STREAMING_PRF_WRAPPER_H_ 19 20 #include <memory> 21 22 #include "tink/primitive_set.h" 23 #include "tink/primitive_wrapper.h" 24 #include "tink/subtle/prf/streaming_prf.h" 25 #include "tink/util/statusor.h" 26 27 namespace crypto { 28 namespace tink { 29 30 // Wraps a set of StreamingPrf-instances containing a single StreamingPrf with a 31 // raw key into a StreamingPrf (essentially just returning the initial prf). 32 // 33 // It is unclear how key rotation should work for Prfs; we use this one to 34 // produce a single one in case the keyset is compatible, and fail otherwise. 35 class StreamingPrfWrapper 36 : public PrimitiveWrapper<StreamingPrf, StreamingPrf> { 37 public: 38 util::StatusOr<std::unique_ptr<StreamingPrf>> Wrap( 39 std::unique_ptr<PrimitiveSet<StreamingPrf>> streaming_prf_set) 40 const override; 41 }; 42 43 } // namespace tink 44 } // namespace crypto 45 46 #endif // TINK_SUBTLE_PRF_STREAMING_PRF_WRAPPER_H_ 47