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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.Checksum;
import sun.security.krb5.Asn1Exception;
import sun.security.krb5.RealmException;
import sun.security.util.*;
import java.io.IOException;
import java.math.BigInteger;

Implements the ASN.1 KRBSafe type.

KRB-SAFE        ::= [APPLICATION 20] SEQUENCE {
        pvno            [0] INTEGER (5),
        msg-type        [1] INTEGER (20),
        safe-body       [2] KRB-SAFE-BODY,
        cksum           [3] Checksum
 }

This definition reflects the Network Working Group RFC 4120 specifications available at http://www.ietf.org/rfc/rfc4120.txt.

/** * Implements the ASN.1 KRBSafe type. * * <pre>{@code * KRB-SAFE ::= [APPLICATION 20] SEQUENCE { * pvno [0] INTEGER (5), * msg-type [1] INTEGER (20), * safe-body [2] KRB-SAFE-BODY, * cksum [3] Checksum * } * }</pre> * * <p> * This definition reflects the Network Working Group RFC 4120 * specifications available at * <a href="http://www.ietf.org/rfc/rfc4120.txt"> * http://www.ietf.org/rfc/rfc4120.txt</a>. */
public class KRBSafe { public int pvno; public int msgType; public KRBSafeBody safeBody; public Checksum cksum; public KRBSafe(KRBSafeBody new_safeBody, Checksum new_cksum) { pvno = Krb5.PVNO; msgType = Krb5.KRB_SAFE; safeBody = new_safeBody; cksum = new_cksum; } public KRBSafe(byte[] data) throws Asn1Exception, RealmException, KrbApErrException, IOException { init(new DerValue(data)); } public KRBSafe(DerValue encoding) throws Asn1Exception, RealmException, KrbApErrException, IOException { init(encoding); }
Initializes an KRBSafe object.
Params:
  • encoding – a single DER-encoded value.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
  • RealmException – if an error occurs while parsing a Realm object.
  • KrbApErrException – if the value read from the DER-encoded data stream does not match the pre-defined value.
/** * Initializes an KRBSafe 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. * @exception KrbApErrException if the value read from the DER-encoded data * stream does not match the pre-defined value. */
private void init(DerValue encoding) throws Asn1Exception, RealmException, KrbApErrException, IOException { DerValue der, subDer; if (((encoding.getTag() & (byte)0x1F) != (byte)0x14) || (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() & 0x1F) == 0x00) { pvno = subDer.getData().getBigInteger().intValue(); if (pvno != Krb5.PVNO) throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); } else throw new Asn1Exception(Krb5.ASN1_BAD_ID); subDer = der.getData().getDerValue(); if ((subDer.getTag() & 0x1F) == 0x01) { msgType = subDer.getData().getBigInteger().intValue(); if (msgType != Krb5.KRB_SAFE) throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); } else throw new Asn1Exception(Krb5.ASN1_BAD_ID); safeBody = KRBSafeBody.parse(der.getData(), (byte)0x02, false); cksum = Checksum.parse(der.getData(), (byte)0x03, false); if (der.getData().available() > 0) throw new Asn1Exception(Krb5.ASN1_BAD_ID); }
Encodes an KRBSafe object.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
Returns:byte array of encoded KRBSafe object.
/** * Encodes an KRBSafe object. * @return byte array of encoded KRBSafe 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 temp = new DerOutputStream(); DerOutputStream bytes = new DerOutputStream(); temp.putInteger(BigInteger.valueOf(pvno)); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp); temp = new DerOutputStream(); temp.putInteger(BigInteger.valueOf(msgType)); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), safeBody.asn1Encode()); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), cksum.asn1Encode()); temp = new DerOutputStream(); temp.write(DerValue.tag_Sequence, bytes); bytes = new DerOutputStream(); bytes.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x14), temp); return bytes.toByteArray(); } }