| // Copyright 2022 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| package hpke |
| |
| // aead is a package-internal interface for the Hybrid Public Key Encryption |
| // (HPKE) authenticated encryption with associated data (AEAD). |
| // |
| // The HPKE RFC is available at |
| // https://www.rfc-editor.org/rfc/rfc9180.html. |
| type aead interface { |
| // seal performs authenticated encryption of plaintext and associatedData |
| // using key and nonce. |
| // |
| // https://www.rfc-editor.org/rfc/rfc9180.html#section-5.2 |
| seal(key, nonce, plaintext, associatedData []byte) ([]byte, error) |
| |
| // open performs authenticated decryption of ciphertext and associatedData |
| // using key and nonce. |
| // |
| // https://www.rfc-editor.org/rfc/rfc9180.html#section-5.2 |
| open(key, nonce, ciphertext, associatedData []byte) ([]byte, error) |
| |
| // id returns the HPKE AEAD algorithm identifier for the underlying AEAD |
| // implementation. |
| // |
| // https://www.rfc-editor.org/rfc/rfc9180.html#section-7.3 |
| id() uint16 |
| |
| // keyLength returns the length of the key. |
| keyLength() int |
| |
| // nonceLength returns the length of the nonce. |
| nonceLength() int |
| } |