1 /* 2 * Copyright (C) 2014 Square, Inc. 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 package com.squareup.okhttp.recipes; 17 18 import com.squareup.okhttp.CertificatePinner; 19 import com.squareup.okhttp.Interceptor; 20 import com.squareup.okhttp.OkHttpClient; 21 import com.squareup.okhttp.Request; 22 import com.squareup.okhttp.Response; 23 import java.io.IOException; 24 import java.security.cert.Certificate; 25 import java.util.Collections; 26 import java.util.Set; 27 28 public final class CheckHandshake { 29 /** Rejects otherwise-trusted certificates. */ 30 private static final Interceptor CHECK_HANDSHAKE_INTERCEPTOR = new Interceptor() { 31 Set<String> blacklist = Collections.singleton("sha1/DmxUShsZuNiqPQsX2Oi9uv2sCnw="); 32 33 @Override public Response intercept(Chain chain) throws IOException { 34 for (Certificate certificate : chain.connection().getHandshake().peerCertificates()) { 35 String pin = CertificatePinner.pin(certificate); 36 if (blacklist.contains(pin)) { 37 throw new IOException("Blacklisted peer certificate: " + pin); 38 } 39 } 40 return chain.proceed(chain.request()); 41 } 42 }; 43 44 private final OkHttpClient client = new OkHttpClient(); 45 46 public CheckHandshake() { 47 client.networkInterceptors().add(CHECK_HANDSHAKE_INTERCEPTOR); 48 } 49 50 public void run() throws Exception { 51 Request request = new Request.Builder() 52 .url("https://publicobject.com/helloworld.txt") 53 .build(); 54 55 Response response = client.newCall(request).execute(); 56 if (!response.isSuccessful()) throw new IOException("Unexpected code " + response); 57 58 System.out.println(response.body().string()); 59 } 60 61 public static void main(String... args) throws Exception { 62 new CheckHandshake().run(); 63 } 64 } 65
