001/* 002 * oauth2-oidc-sdk 003 * 004 * Copyright 2012-2016, Connect2id Ltd and contributors. 005 * 006 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use 007 * this file except in compliance with the License. You may obtain a copy of the 008 * License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software distributed 013 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 014 * CONDITIONS OF ANY KIND, either express or implied. See the License for the 015 * specific language governing permissions and limitations under the License. 016 */ 017 018package com.nimbusds.openid.connect.sdk.validators; 019 020 021import com.nimbusds.jose.JWSAlgorithm; 022import com.nimbusds.oauth2.sdk.AuthorizationCode; 023import com.nimbusds.openid.connect.sdk.claims.CodeHash; 024import net.jcip.annotations.ThreadSafe; 025 026 027/** 028 * Authorisation code validator, using the {@code c_hash} ID token claim. 029 * Required in the hybrid flow where the authorisation code is returned 030 * together with an ID token at the authorisation endpoint. 031 * 032 * <p>Related specifications: 033 * 034 * <ul> 035 * <li>OpenID Connect Core 1.0, section 3.3.2.10. 036 * </ul> 037 */ 038@ThreadSafe 039public class AuthorizationCodeValidator { 040 041 042 /** 043 * Validates the specified authorisation code. 044 * 045 * @param code The authorisation code. Must not be 046 * {@code null}. 047 * @param jwsAlgorithm The JWS algorithm of the ID token. Must not 048 * be {@code null}.= 049 * @param codeHash The authorisation code hash, as set in the 050 * {@code c_hash} ID token claim. Must not be 051 * {@code null}. 052 * 053 * @throws InvalidHashException If the authorisation code doesn't match 054 * the hash. 055 */ 056 public static void validate(final AuthorizationCode code, 057 final JWSAlgorithm jwsAlgorithm, 058 final CodeHash codeHash) 059 throws InvalidHashException { 060 061 CodeHash expectedHash = CodeHash.compute(code, jwsAlgorithm); 062 063 if (expectedHash == null) { 064 throw InvalidHashException.INVALID_CODE_HASH_EXCEPTION; 065 } 066 067 if (! expectedHash.equals(codeHash)) { 068 throw InvalidHashException.INVALID_CODE_HASH_EXCEPTION; 069 } 070 } 071}