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Camel Cryptographic Support

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/*
 * 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.apache.camel.converter.crypto;

import java.util.List;

import org.apache.camel.Exchange;
import org.bouncycastle.openpgp.PGPPublicKey;

public interface PGPPublicKeyAccessor {

    /**
     * Returns the encryption keys for the given user ID parts. This method is used for encryption.
     * 
     * @param  exchange    exchange, can be null
     * @param  useridParts parts of User IDs, must not be null
     * @return             list of public keys, must not be null
     */
    List getEncryptionKeys(Exchange exchange, List useridParts) throws Exception;

    /**
     * Returns the public key with a certain key ID. This method is used for verifying the signature. The given User IDs
     * are provided to filter the public key, further. If the User ID parts list is empty, then any public key can be
     * returned which has the specified key ID. If the User ID parts list is not empty then the returned key must have a
     * User ID which contains at least one User ID part.
     * 
     * @param  exchange    exchange
     * @param  keyId       key ID
     * @param  useridParts parts of User IDs, must not be null, but can be empty
     * @return             public key or null if the key cannot be found
     */
    PGPPublicKey getPublicKey(Exchange exchange, long keyId, List useridParts) throws Exception;

}