/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.waveprotocol.wave.crypto;

import java.security.cert.X509Certificate;
import java.util.List;

/**
 * A cert path (aka cert chain) validator interface.  Not specifically for wave, but the class name
 * {@code CertPathValidator} was already taken.
 */
public interface WaveCertPathValidator {
  /**
   * Validates a certificate chain. The first certificate in the chain is the certificate for the
   * key used for signing. The last certificate in the chain is either a trusted CA certificate, or
   * a certificate issued by a trusted CA. Certificate N in the chain must have been issued by
   * certificate N+1 in the chain.
   *
   * @param certs list of certificates
   * @throws SignatureException if the certificate chain doesn't validate.
   */
  void validate(List<? extends X509Certificate> certs) throws SignatureException;
}