1 /* 2 * Copyright 2023, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package com.google.auth.oauth2; 33 34 import static org.junit.Assert.assertEquals; 35 36 import java.security.MessageDigest; 37 import java.security.NoSuchAlgorithmException; 38 import java.util.Base64; 39 import org.junit.Test; 40 import org.junit.runner.RunWith; 41 import org.junit.runners.JUnit4; 42 43 @RunWith(JUnit4.class) 44 public final class DefaultPKCEProviderTest { 45 @Test testPkceExpected()46 public void testPkceExpected() throws NoSuchAlgorithmException { 47 PKCEProvider pkce = new DefaultPKCEProvider(); 48 49 byte[] bytes = pkce.getCodeVerifier().getBytes(); 50 MessageDigest md = MessageDigest.getInstance("SHA-256"); 51 md.update(bytes); 52 53 byte[] digest = md.digest(); 54 55 String expectedCodeChallenge = Base64.getUrlEncoder().encodeToString(digest); 56 String expectedCodeChallengeMethod = "S256"; 57 58 assertEquals(pkce.getCodeChallenge(), expectedCodeChallenge); 59 assertEquals(pkce.getCodeChallengeMethod(), expectedCodeChallengeMethod); 60 } 61 } 62