/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 *

 *  (C) Copyright IBM Corp. 1999 All Rights Reserved.

 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.

 */

package sun.security.krb5.internal;

import sun.security.krb5.*;

import sun.security.util.*;

import java.util.Vector;

import java.io.IOException;

import java.io.*;

/**

 * Implements the ASN.1 EncTicketPart type.

 *

 * <pre>{@code

 * EncTicketPart   ::= [APPLICATION 3] SEQUENCE {

 *         flags                   [0] TicketFlags,

 *         key                     [1] EncryptionKey,

 *         crealm                  [2] Realm,

 *         cname                   [3] PrincipalName,

 *         transited               [4] TransitedEncoding,

 *         authtime                [5] KerberosTime,

 *         starttime               [6] KerberosTime OPTIONAL,

 *         endtime                 [7] KerberosTime,

 *         renew-till              [8] KerberosTime OPTIONAL,

 *         caddr                   [9] HostAddresses OPTIONAL,

 *         authorization-data      [10] AuthorizationData OPTIONAL

 * }

 * }</pre>

 *

 * <p>

 * This definition reflects the Network Working Group RFC 4120

 * specification available at

 * <a href="http://www.ietf.org/rfc/rfc4120.txt">

 * http://www.ietf.org/rfc/rfc4120.txt</a>.

 */

public class EncTicketPart {

    public TicketFlags flags;

    public EncryptionKey key;

    public PrincipalName cname;

    public TransitedEncoding transited;

    public KerberosTime authtime;

    public KerberosTime starttime; //optional

    public KerberosTime endtime;

    public KerberosTime renewTill; //optional

    public HostAddresses caddr; //optional

    public AuthorizationData authorizationData; //optional

    public EncTicketPart(

            TicketFlags new_flags,

            EncryptionKey new_key,

            PrincipalName new_cname,

            TransitedEncoding new_transited,

            KerberosTime new_authtime,

            KerberosTime new_starttime,

            KerberosTime new_endtime,

            KerberosTime new_renewTill,

            HostAddresses new_caddr,

            AuthorizationData new_authorizationData) {

        flags = new_flags;

        key = new_key;

        cname = new_cname;

        transited = new_transited;

        authtime = new_authtime;

        starttime = new_starttime;

        endtime = new_endtime;

        renewTill = new_renewTill;

        caddr = new_caddr;

        authorizationData = new_authorizationData;

    }

    public EncTicketPart(byte[] data)

            throws Asn1Exception, KrbException, IOException {

        init(new DerValue(data));

    }

    public EncTicketPart(DerValue encoding)

            throws Asn1Exception, KrbException, IOException {

        init(encoding);

    }

    /**

     * Initializes an EncTicketPart object.

     * @param encoding a single DER-encoded value.

     * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.

     * @exception IOException if an I/O error occurs while reading encoded data.

     * @exception RealmException if an error occurs while parsing a Realm object.

     */

    private static String getHexBytes(byte[] bytes, int len)

            throws IOException {

        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < len; i++) {

            int b1 = (bytes[i] >> 4) & 0x0f;

            int b2 = bytes[i] & 0x0f;

            sb.append(Integer.toHexString(b1));

            sb.append(Integer.toHexString(b2));

            sb.append(' ');

        }

        return sb.toString();

    }

    private void init(DerValue encoding)

            throws Asn1Exception, IOException, RealmException {

        DerValue der, subDer;

        renewTill = null;

        caddr = null;

        authorizationData = null;

        if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x03)

                || (encoding.isApplication() != true)

                || (encoding.isConstructed() != true)) {

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

        der = encoding.getData().getDerValue();

        if (der.getTag() != DerValue.tag_Sequence) {

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

        flags = TicketFlags.parse(der.getData(), (byte) 0x00, false);

        key = EncryptionKey.parse(der.getData(), (byte) 0x01, false);

        Realm crealm = Realm.parse(der.getData(), (byte) 0x02, false);

        cname = PrincipalName.parse(der.getData(), (byte) 0x03, false, crealm);

        transited = TransitedEncoding.parse(der.getData(), (byte) 0x04, false);

        authtime = KerberosTime.parse(der.getData(), (byte) 0x05, false);

        starttime = KerberosTime.parse(der.getData(), (byte) 0x06, true);

        endtime = KerberosTime.parse(der.getData(), (byte) 0x07, false);

        if (der.getData().available() > 0) {

            renewTill = KerberosTime.parse(der.getData(), (byte) 0x08, true);

        }

        if (der.getData().available() > 0) {

            caddr = HostAddresses.parse(der.getData(), (byte) 0x09, true);

        }

        if (der.getData().available() > 0) {

            authorizationData = AuthorizationData.parse(der.getData(), (byte) 0x0A, true);

        }

        if (der.getData().available() > 0) {

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

    }

    /**

     * Encodes an EncTicketPart object.

     * @return byte array of encoded EncTicketPart object.

     * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.

     * @exception IOException if an I/O error occurs while reading encoded data.

     */

    public byte[] asn1Encode() throws Asn1Exception, IOException {

        DerOutputStream bytes = new DerOutputStream();

        DerOutputStream temp = new DerOutputStream();

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                true, (byte) 0x00), flags.asn1Encode());

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                true, (byte) 0x01), key.asn1Encode());

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                true, (byte) 0x02), cname.getRealm().asn1Encode());

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                true, (byte) 0x03), cname.asn1Encode());

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                true, (byte) 0x04), transited.asn1Encode());

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                true, (byte) 0x05), authtime.asn1Encode());

        if (starttime != null) {

            bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                    true, (byte) 0x06), starttime.asn1Encode());

        }

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                true, (byte) 0x07), endtime.asn1Encode());

        if (renewTill != null) {

            bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                    true, (byte) 0x08), renewTill.asn1Encode());

        }

        if (caddr != null) {

            bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                    true, (byte) 0x09), caddr.asn1Encode());

        }

        if (authorizationData != null) {

            bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT,

                    true, (byte) 0x0A), authorizationData.asn1Encode());

        }

        temp.write(DerValue.tag_Sequence, bytes);

        bytes = new DerOutputStream();

        bytes.write(DerValue.createTag(DerValue.TAG_APPLICATION,

                true, (byte) 0x03), temp);

        return bytes.toByteArray();

    }

}