/*

 * 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

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/*

 *

 *  (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;

/**

 * Implements the ASN.1 KrbCredInfo type.

 *

 * <pre>{@code

 * KrbCredInfo  ::= SEQUENCE {

 *      key             [0] EncryptionKey,

 *      prealm          [1] Realm OPTIONAL,

 *      pname           [2] PrincipalName OPTIONAL,

 *      flags           [3] TicketFlags OPTIONAL,

 *      authtime        [4] KerberosTime OPTIONAL,

 *      starttime       [5] KerberosTime OPTIONAL,

 *      endtime         [6] KerberosTime OPTIONAL,

 *      renew-till      [7] KerberosTime OPTIONAL,

 *      srealm          [8] Realm OPTIONAL,

 *      sname           [9] PrincipalName OPTIONAL,

 *      caddr           [10] HostAddresses 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 KrbCredInfo {

    public EncryptionKey key;

    public PrincipalName pname; //optional

    public TicketFlags flags; //optional

    public KerberosTime authtime; //optional

    public KerberosTime starttime; //optional

    public KerberosTime endtime; //optional

    public KerberosTime renewTill; //optional

    public PrincipalName sname; //optional

    public HostAddresses caddr; //optional

    private KrbCredInfo() {

    }

    public KrbCredInfo(

                       EncryptionKey new_key,

                       PrincipalName new_pname,

                       TicketFlags new_flags,

                       KerberosTime new_authtime,

                       KerberosTime new_starttime,

                       KerberosTime new_endtime,

                       KerberosTime new_renewTill,

                       PrincipalName new_sname,

                       HostAddresses new_caddr

                           ) {

        key = new_key;

        pname = new_pname;

        flags = new_flags;

        authtime = new_authtime;

        starttime = new_starttime;

        endtime = new_endtime;

        renewTill = new_renewTill;

        sname = new_sname;

        caddr = new_caddr;

    }

    /**

     * Constructs a KrbCredInfo object.

     * @param encoding a Der-encoded data.

     * @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.

     */

    public KrbCredInfo(DerValue encoding)

            throws Asn1Exception, IOException, RealmException{

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

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

        pname = null;

        flags = null;

        authtime = null;

        starttime = null;

        endtime = null;

        renewTill = null;

        sname = null;

        caddr = null;

        key = EncryptionKey.parse(encoding.getData(), (byte)0x00, false);

        Realm prealm = null, srealm = null;

        if (encoding.getData().available() > 0)

            prealm = Realm.parse(encoding.getData(), (byte)0x01, true);

        if (encoding.getData().available() > 0)

            pname = PrincipalName.parse(encoding.getData(), (byte)0x02, true, prealm);

        if (encoding.getData().available() > 0)

            flags = TicketFlags.parse(encoding.getData(), (byte)0x03, true);

        if (encoding.getData().available() > 0)

            authtime = KerberosTime.parse(encoding.getData(), (byte)0x04, true);

        if (encoding.getData().available() > 0)

            starttime = KerberosTime.parse(encoding.getData(), (byte)0x05, true);

        if (encoding.getData().available() > 0)

            endtime = KerberosTime.parse(encoding.getData(), (byte)0x06, true);

        if (encoding.getData().available() > 0)

            renewTill = KerberosTime.parse(encoding.getData(), (byte)0x07, true);

        if (encoding.getData().available() > 0)

            srealm = Realm.parse(encoding.getData(), (byte)0x08, true);

        if (encoding.getData().available() > 0)

            sname = PrincipalName.parse(encoding.getData(), (byte)0x09, true, srealm);

        if (encoding.getData().available() > 0)

            caddr = HostAddresses.parse(encoding.getData(), (byte)0x0A, true);

        if (encoding.getData().available() > 0)

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

    }

    /**

     * Encodes an KrbCredInfo object.

     * @return the byte array of encoded KrbCredInfo 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 {

        Vector<DerValue> v = new Vector<>();

        v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), key.asn1Encode()));

        if (pname != null) {

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), pname.getRealm().asn1Encode()));

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), pname.asn1Encode()));

        }

        if (flags != null)

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), flags.asn1Encode()));

        if (authtime != null)

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x04), authtime.asn1Encode()));

        if (starttime != null)

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x05), starttime.asn1Encode()));

        if (endtime != null)

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x06), endtime.asn1Encode()));

        if (renewTill != null)

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x07), renewTill.asn1Encode()));

        if (sname != null) {

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x08), sname.getRealm().asn1Encode()));

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x09), sname.asn1Encode()));

        }

        if (caddr != null)

            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x0A), caddr.asn1Encode()));

        DerValue[] der = new DerValue[v.size()];

        v.copyInto(der);

        DerOutputStream out = new DerOutputStream();

        out.putSequence(der);

        return out.toByteArray();

    }

    public Object clone() {

        KrbCredInfo kcred = new KrbCredInfo();

        kcred.key = (EncryptionKey)key.clone();

        // optional fields

        if (pname != null)

            kcred.pname = (PrincipalName)pname.clone();

        if (flags != null)

            kcred.flags = (TicketFlags)flags.clone();

        kcred.authtime = authtime;

        kcred.starttime = starttime;

        kcred.endtime = endtime;

        kcred.renewTill = renewTill;

        if (sname != null)

            kcred.sname = (PrincipalName)sname.clone();

        if (caddr != null)

            kcred.caddr = (HostAddresses)caddr.clone();

        return kcred;

    }

}