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OAuth 2.0 SDK with OpenID Connection extensions for developing client and server applications.

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/*
 * oauth2-oidc-sdk
 *
 * Copyright 2012-2016, Connect2id Ltd and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use
 * this file except in compliance with the License. You may obtain a copy of the
 * License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed
 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */

package com.nimbusds.openid.connect.sdk.validators;


import com.nimbusds.jose.JWSAlgorithm;
import com.nimbusds.oauth2.sdk.id.State;
import com.nimbusds.openid.connect.sdk.claims.StateHash;
import net.jcip.annotations.ThreadSafe;


/**
 * State validator, using the optional {@code s_hash} ID token claim. Required
 * for applications that must comply with Financial Services – Financial API -
 * Part 2: Read and Write API Security Profile.
 *
 * 

Related specifications: * *

    *
  • Financial Services – Financial API - Part 2: Read and Write API * Security Profile, section 5.1. *
*/ @ThreadSafe public class StateValidator { /** * Validates the specified state. * * @param state The state received at the redirection URI. Must * not be {@code null}. * @param jwsAlgorithm The JWS algorithm of the ID token. Must not be * be {@code null}. * @param stateHash The state hash, as set in the {@code s_hash} ID * token claim. Must not be {@code null}. * * @throws InvalidHashException If the received state doesn't match the * hash. */ public static void validate(final State state, final JWSAlgorithm jwsAlgorithm, final StateHash stateHash) throws InvalidHashException { StateHash expectedHash = StateHash.compute(state, jwsAlgorithm); if (expectedHash == null) { throw InvalidHashException.INVALID_STATE_HASH_EXCEPTION; } if (! expectedHash.equals(stateHash)) { throw InvalidHashException.INVALID_STATE_HASH_EXCEPTION; } } }




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