1 /*
2 * Copyright 2023 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://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, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.handler.codec.quic;
17
18 import java.nio.ByteBuffer;
19
20 /**
21 * Generate
22 * <a href="https://www.ietf.org/archive/id/draft-ietf-quic-transport-29.html#name-calculating-a-stateless-res">
23 * stateless reset tokens</a> to use.
24 */
25 public interface QuicResetTokenGenerator {
26
27 /**
28 * Generate a reset token to use for the given connection id. The returned token MUST be of length 16.
29 * @param cid the connection id
30 * @return a newly generated reset token
31 */
32 ByteBuffer newResetToken(ByteBuffer cid);
33
34 /**
35 * Return a {@link QuicResetTokenGenerator} which generates new reset tokens by signing the given input.
36 *
37 * @return a {@link QuicResetTokenGenerator} which generates new reset tokens by signing the given input.
38 */
39 static QuicResetTokenGenerator signGenerator() {
40 return HmacSignQuicResetTokenGenerator.INSTANCE;
41 }
42 }