1   /*
2    * Copyright 2025 LINE Corporation
3    *
4    * LINE Corporation 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 com.linecorp.centraldogma.server.auth;
17  
18  import java.security.cert.X509Certificate;
19  
20  import org.jspecify.annotations.Nullable;
21  
22  /**
23   * Extracts the certificate ID from the peer certificate.
24   */
25  @FunctionalInterface
26  public interface ApplicationCertificateIdExtractor {
27  
28      /**
29       * Extracts the certificate ID from the peer certificate.
30       */
31      @Nullable
32      String extractCertificateId(X509Certificate certificate);
33  }