/* * 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.math.BigInteger; /** * Implements the ASN.1 Authenticator type. * * <xmp> * Authenticator   ::= [APPLICATION 2] SEQUENCE  { *         authenticator-vno       [0] INTEGER (5), *         crealm                  [1] Realm, *         cname                   [2] PrincipalName, *         cksum                   [3] Checksum OPTIONAL, *         cusec                   [4] Microseconds, *         ctime                   [5] KerberosTime, *         subkey                  [6] EncryptionKey OPTIONAL, *         seq-number              [7] UInt32 OPTIONAL, *         authorization-data      [8] AuthorizationData OPTIONAL * } * </xmp> * * <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 Authenticator {     public int authenticator_vno;    public Realm crealm;    public PrincipalName cname;    Checksum cksum; //optional    public int cusec;    public KerberosTime ctime;    EncryptionKey subKey; //optional    Integer seqNumber; //optional    public AuthorizationData authorizationData; //optional     public Authenticator(            Realm new_crealm,            PrincipalName new_cname,            Checksum new_cksum,            int new_cusec,            KerberosTime new_ctime,            EncryptionKey new_subKey,            Integer new_seqNumber,            AuthorizationData new_authorizationData) {        authenticator_vno = Krb5.AUTHNETICATOR_VNO;        crealm = new_crealm;        cname = new_cname;        cksum = new_cksum;        cusec = new_cusec;        ctime = new_ctime;        subKey = new_subKey;        seqNumber = new_seqNumber;        authorizationData = new_authorizationData;    }     public Authenticator(byte[] data)            throws Asn1Exception, IOException, KrbApErrException, RealmException {        init(new DerValue(data));    }     public Authenticator(DerValue encoding)            throws Asn1Exception, IOException, KrbApErrException, RealmException {        init(encoding);    }     /**     * Initializes an Authenticator 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 KrbApErrException if the value read from the DER-encoded data     *  stream does not match the pre-defined value.     * @exception RealmException if an error occurs while parsing a Realm object.     */    private void init(DerValue encoding)            throws Asn1Exception, IOException, KrbApErrException, RealmException {        DerValue der, subDer;        //may not be the correct error code for a tag        //mismatch on an encrypted structure        if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x02)                || (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);        }        subDer = der.getData().getDerValue();        if ((subDer.getTag() & (byte) 0x1F) != (byte) 0x00) {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }        authenticator_vno = subDer.getData().getBigInteger().intValue();        if (authenticator_vno != 5) {            throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION);        }        crealm = Realm.parse(der.getData(), (byte) 0x01, false);        cname = PrincipalName.parse(der.getData(), (byte) 0x02, false);        cksum = Checksum.parse(der.getData(), (byte) 0x03, true);        subDer = der.getData().getDerValue();        if ((subDer.getTag() & (byte) 0x1F) == 0x04) {            cusec = subDer.getData().getBigInteger().intValue();        } else {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }        ctime = KerberosTime.parse(der.getData(), (byte) 0x05, false);        if (der.getData().available() > 0) {            subKey = EncryptionKey.parse(der.getData(), (byte) 0x06, true);        } else {            subKey = null;            seqNumber = null;            authorizationData = null;        }        if (der.getData().available() > 0) {            if ((der.getData().peekByte() & 0x1F) == 0x07) {                subDer = der.getData().getDerValue();                if ((subDer.getTag() & (byte) 0x1F) == (byte) 0x07) {                    seqNumber = new Integer(subDer.getData().getBigInteger().intValue());                }            }        } else {            seqNumber = null;            authorizationData = null;        }        if (der.getData().available() > 0) {            authorizationData = AuthorizationData.parse(der.getData(), (byte) 0x08, true);        } else {            authorizationData = null;        }        if (der.getData().available() > 0) {            throw new Asn1Exception(Krb5.ASN1_BAD_ID);        }    }     /**     * Encodes an Authenticator object.     * @return byte array of encoded Authenticator 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<>();        DerOutputStream temp = new DerOutputStream();        temp.putInteger(BigInteger.valueOf(authenticator_vno));        v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x00), temp.toByteArray()));        v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x01), crealm.asn1Encode()));        v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x02), cname.asn1Encode()));        if (cksum != null) {            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x03), cksum.asn1Encode()));        }        temp = new DerOutputStream();        temp.putInteger(BigInteger.valueOf(cusec));        v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x04), temp.toByteArray()));        v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x05), ctime.asn1Encode()));        if (subKey != null) {            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x06), subKey.asn1Encode()));        }        if (seqNumber != null) {            temp = new DerOutputStream();            // encode as an unsigned integer (UInt32)            temp.putInteger(BigInteger.valueOf(seqNumber.longValue()));            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x07), temp.toByteArray()));        }        if (authorizationData != null) {            v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x08), authorizationData.asn1Encode()));        }        DerValue der[] = new DerValue[v.size()];        v.copyInto(der);        temp = new DerOutputStream();        temp.putSequence(der);        DerOutputStream out = new DerOutputStream();        out.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte) 0x02), temp);        return out.toByteArray();    }     public final Checksum getChecksum() {        return cksum;    }     public final Integer getSeqNumber() {        return seqNumber;    }     public final EncryptionKey getSubKey() {        return subKey;    }}