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*
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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package sun.security.jgss.spnego;
import java.io.*;
import java.util.*;
import org.ietf.jgss.*;
import sun.security.jgss.*;
import sun.security.util.*;
/**
* Implements the SPNEGO NegTokenInit token
* as specified in RFC 2478
*
* NegTokenInit ::= SEQUENCE {
* mechTypes [0] MechTypeList OPTIONAL,
* reqFlags [1] ContextFlags OPTIONAL,
* mechToken [2] OCTET STRING OPTIONAL,
* mechListMIC [3] OCTET STRING OPTIONAL
* }
*
* MechTypeList ::= SEQUENCE OF MechType
*
* MechType::= OBJECT IDENTIFIER
*
* ContextFlags ::= BIT STRING {
* delegFlag (0),
* mutualFlag (1),
* replayFlag (2),
* sequenceFlag (3),
* anonFlag (4),
* confFlag (5),
* integFlag (6)
* }
*
* @author Seema Malkani
* @since 1.6
*/
public class NegTokenInit extends SpNegoToken {
// DER-encoded mechTypes
private byte[] mechTypes = null;
private Oid[] mechTypeList = null;
private BitArray reqFlags = null;
private byte[] mechToken = null;
private byte[] mechListMIC = null;
NegTokenInit(byte[] mechTypes, BitArray flags,
byte[] token, byte[] mechListMIC)
{
super(NEG_TOKEN_INIT_ID);
this.mechTypes = mechTypes;
this.reqFlags = flags;
this.mechToken = token;
this.mechListMIC = mechListMIC;
}
// Used by sun.security.jgss.wrapper.NativeGSSContext
// to parse SPNEGO tokens
public NegTokenInit(byte[] in) throws GSSException {
super(NEG_TOKEN_INIT_ID);
parseToken(in);
}
final byte[] encode() throws GSSException {
try {
// create negInitToken
DerOutputStream initToken = new DerOutputStream();
// DER-encoded mechTypes with CONTEXT 00
if (mechTypes != null) {
initToken.write(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x00), mechTypes);
}
// write context flags with CONTEXT 01
if (reqFlags != null) {
DerOutputStream flags = new DerOutputStream();
flags.putUnalignedBitString(reqFlags);
initToken.write(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x01), flags);
}
// mechToken with CONTEXT 02
if (mechToken != null) {
DerOutputStream dataValue = new DerOutputStream();
dataValue.putOctetString(mechToken);
initToken.write(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x02), dataValue);
}
// mechListMIC with CONTEXT 03
if (mechListMIC != null) {
if (DEBUG) {
System.out.println("SpNegoToken NegTokenInit: " +
"sending MechListMIC");
}
DerOutputStream mic = new DerOutputStream();
mic.putOctetString(mechListMIC);
initToken.write(DerValue.createTag(DerValue.TAG_CONTEXT,
true, (byte) 0x03), mic);
}
// insert in a SEQUENCE
DerOutputStream out = new DerOutputStream();
out.write(DerValue.tag_Sequence, initToken);
return out.toByteArray();
} catch (IOException e) {
throw new GSSException(GSSException.DEFECTIVE_TOKEN, -1,
"Invalid SPNEGO NegTokenInit token : " + e.getMessage());
}
}
private void parseToken(byte[] in) throws GSSException {
try {
DerValue der = new DerValue(in);
// verify NegotiationToken type token
if (!der.isContextSpecific((byte) NEG_TOKEN_INIT_ID)) {
throw new IOException("SPNEGO NegoTokenInit : " +
"did not have right token type");
}
DerValue tmp1 = der.data.getDerValue();
if (tmp1.tag != DerValue.tag_Sequence) {
throw new IOException("SPNEGO NegoTokenInit : " +
"did not have the Sequence tag");
}
// parse SEQUENCE of mechTypes, if present
if (tmp1.data.available() > 0) {
DerValue tmp2 = tmp1.data.getDerValue();
if (!tmp2.isContextSpecific((byte)0x00)) {
throw new IOException("SPNEGO NegoTokenInit : " +
"did not have the right context tag for mechTypes");
}
// get the DER-encoded sequence of mechTypes
DerInputStream mValue = tmp2.data;
mechTypes = mValue.toByteArray();
// read all the mechTypes
DerValue[] mList = mValue.getSequence(0);
mechTypeList = new Oid[mList.length];
ObjectIdentifier mech = null;
for (int i = 0; i < mList.length; i++) {
mech = mList[i].getOID();
if (DEBUG) {
System.out.println("SpNegoToken NegTokenInit: " +
"reading Mechanism Oid = " + mech);
}
mechTypeList[i] = new Oid(mech.toString());
}
}
// parse mechToken, if present (skip reqFlags)
if (tmp1.data.available() > 0) {
DerValue tmp3 = tmp1.data.getDerValue();
if (tmp3.isContextSpecific((byte)0x01)) {
// received reqFlags, skip it
// now parse next field mechToken
if (tmp1.data.available() > 0) {
tmp3 = tmp1.data.getDerValue();
}
}
if (!tmp3.isContextSpecific((byte)0x02)) {
throw new IOException("SPNEGO NegoTokenInit : " +
"did not have the right context tag for mechToken");
}
if (DEBUG) {
System.out.println("SpNegoToken NegTokenInit: " +
"reading Mech Token");
}
mechToken = tmp3.data.getOctetString();
}
// parse mechListMIC, if present and not in MS interop mode
if (!GSSUtil.useMSInterop() && (tmp1.data.available() > 0)) {
if (DEBUG) {
System.out.println("SpNegoToken NegTokenInit: " +
"receiving MechListMIC");
}
DerValue tmp6 = tmp1.data.getDerValue();
if (!tmp6.isContextSpecific((byte)0x03)) {
throw new IOException("SPNEGO NegoTokenInit : " +
"did not have the right context tag for MICToken");
}
mechListMIC = tmp6.data.getOctetString();
if (DEBUG) {
System.out.println("SpNegoToken NegTokenInit: " +
"MechListMIC Token = " + getHexBytes(mechListMIC));
}
} else {
if (DEBUG) {
System.out.println("SpNegoToken NegTokenInit : " +
"no MIC token included");
}
}
} catch (IOException e) {
throw new GSSException(GSSException.DEFECTIVE_TOKEN, -1,
"Invalid SPNEGO NegTokenInit token : " + e.getMessage());
}
}
byte[] getMechTypes() {
return mechTypes;
}
// Used by sun.security.jgss.wrapper.NativeGSSContext
// to find the mechs in SPNEGO tokens
public Oid[] getMechTypeList() {
return mechTypeList;
}
BitArray getReqFlags() {
return reqFlags;
}
// Used by sun.security.jgss.wrapper.NativeGSSContext
// to access the mech token portion of SPNEGO tokens
public byte[] getMechToken() {
return mechToken;
}
byte[] getMechListMIC() {
return mechListMIC;
}
}