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_AEAD_CORD_AEAD_WRAPPER_H_ 18 #define TINK_AEAD_CORD_AEAD_WRAPPER_H_ 19 20 #include <memory> 21 22 #include "tink/aead/cord_aead.h" 23 #include "tink/primitive_set.h" 24 #include "tink/primitive_wrapper.h" 25 #include "tink/util/statusor.h" 26 27 namespace crypto { 28 namespace tink { 29 30 // Wraps a set of AeadCord-instances that correspond to a keyset, 31 // and combines them into a single AeadCord-primitive, that uses the provided 32 // instances, depending on the context: 33 // * CordAead::Encrypt(...) uses the primary instance from the set 34 // * CordAead::Decrypt(...) uses the instance that matches the ciphertext 35 // prefix. 36 class CordAeadWrapper : public PrimitiveWrapper<CordAead, CordAead> { 37 public: 38 // Returns an Aead-primitive that uses Aead-instances provided in 'aead_set', 39 // which must be non-NULL and must contain a primary instance. 40 util::StatusOr<std::unique_ptr<CordAead>> Wrap( 41 std::unique_ptr<PrimitiveSet<CordAead>> aead_set) const override; 42 }; 43 44 } // namespace tink 45 } // namespace crypto 46 47 #endif // TINK_AEAD_CORD_AEAD_WRAPPER_H_ 48