1 /*
2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.cobalt.crypto;
18 
19 import androidx.annotation.NonNull;
20 
21 /** The API for providing Hybrid Public Key Encryption (HPKE) to Cobalt. */
22 public interface HpkeEncrypt {
23 
24     /**
25      * Encrypt a byte string using HPKE.
26      *
27      * @param publicKey the public key to use for encryption
28      * @param plainText the plain text string to encrypt
29      * @param contextInfo the HPKE associated data
30      * @return the encrypted ciphertext
31      */
encrypt( @onNull byte[] publicKey, @NonNull byte[] plainText, @NonNull byte[] contextInfo)32     byte[] encrypt(
33             @NonNull byte[] publicKey, @NonNull byte[] plainText, @NonNull byte[] contextInfo);
34 }
35