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/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project 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 ch.cern.hbase.thirdparty.io.netty.internal.tcnative;

/**
 * Session Ticket Key
 */
public final class SessionTicketKey {
    /**
     * Size of session ticket key name
     */
    public static final int NAME_SIZE = 16;
    /**
     * Size of session ticket key HMAC key
     */
    public static final int HMAC_KEY_SIZE = 16;
    /**
     * Size of session ticket key AES key
     */
    public static final int AES_KEY_SIZE = 16;
    /**
     * Size of session ticket key
     */
    public static final int TICKET_KEY_SIZE = NAME_SIZE + HMAC_KEY_SIZE + AES_KEY_SIZE;

    // package private so we can access these in SSLContext without calling clone() on the byte[].
    final byte[] name;
    final byte[] hmacKey;
    final byte[] aesKey;

    /**
     * Construct SessionTicketKey.
     * @param name the name of the session ticket key
     * @param hmacKey the HMAC key of the session ticket key
     * @param aesKey the AES key of the session ticket key
     */
    public SessionTicketKey(byte[] name, byte[] hmacKey, byte[] aesKey) {
        if (name == null || name.length != NAME_SIZE) {
            throw new IllegalArgumentException("Length of name should be " + NAME_SIZE);
        }
        if (hmacKey == null || hmacKey.length != HMAC_KEY_SIZE) {
            throw new IllegalArgumentException("Length of hmacKey should be " + HMAC_KEY_SIZE);
        }
        if (aesKey == null || aesKey.length != AES_KEY_SIZE) {
            throw new IllegalArgumentException("Length of aesKey should be " + AES_KEY_SIZE);
        }
        this.name = name;
        this.hmacKey = hmacKey;
        this.aesKey = aesKey;
    }

    /**
     * Get name.
     *
     * @return the name of the session ticket key
     */
    public byte[] getName() {
        return name.clone();
    }

    /**
     * Get HMAC key.
     * @return the HMAC key of the session ticket key
     */
    public byte[] getHmacKey() {
        return hmacKey.clone();
    }

    /**
     * Get AES Key.
     * @return the AES key of the session ticket key
     */
    public byte[] getAesKey() {
        return aesKey.clone();
    }
}