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 17package subtle 18 19// EciesAEADHKDFDEMHelper a helper for DEM (data encapsulation mechanism) of ECIES-AEAD-HKDF. 20type EciesAEADHKDFDEMHelper interface { 21 22 // GetSymmetricKeySize gives the size of the DEM-key in bytes 23 GetSymmetricKeySize() uint32 24 25 // GetAEADOrDAEAD returns the newly created AEAD or Deterministic Aead primitive. 26 GetAEADOrDAEAD(symmetricKeyValue []byte) (interface{}, error) 27} 28