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// INDCPACipher provides an interface for symmetric key ciphers that are 20// indistinguishable against chosen-plaintext attacks. Said primitives do not 21// provide authentication, thus should not be used directly, but only to 22// construct safer primitives such as AEAD. 23type INDCPACipher interface { 24 // Encrypt encrypts plaintext. The resulting ciphertext is indistinguishable under 25 // chosen-plaintext attack. However, it does not have integrity protection. 26 Encrypt(plaintext []byte) ([]byte, error) 27 28 // Decrypt decrypts ciphertext and returns the resulting plaintext. 29 Decrypt(ciphertext []byte) ([]byte, error) 30} 31