1// Copyright 2022 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 keyderivation 18 19import ( 20 "github.com/google/tink/go/keyset" 21) 22 23// KeysetDeriver is the interface used to derive new keysets based on an 24// additional input, the salt. 25// 26// The salt is used to create the keyset using a pseudorandom function. 27// Implementations must be indistinguishable from ideal KeysetDerivers, which, 28// for every salt, generates a new random keyset and caches it. 29type KeysetDeriver interface { 30 DeriveKeyset(salt []byte) (*keyset.Handle, error) 31} 32