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SMB2 protocol library for communication with Windows servers
/*
* Copyright (C)2016 - SMBJ Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hierynomus.spnego;
import com.hierynomus.protocol.commons.buffer.Buffer;
import com.hierynomus.protocol.commons.buffer.Endian;
import org.bouncycastle.asn1.*;
import java.io.IOException;
import java.math.BigInteger;
/**
* This class can encode and decode the SPNEGO negTokenInit Token.
*
* The entire token is an ASN.1 DER encoded sequence of bytes in little endian byte encoding.
*
* The following if the ASN.1 specification of the full structure of the token:
*
*
* NegotiationToken ::= CHOICE {
* negTokenInit [0] NegTokenInit,
* negTokenTarg [1] NegTokenTarg
* }
*
* NegTokenTarg ::= SEQUENCE {
* negResult [0] ENUMERATED {
* accept_completed (0),
* accept_incomplete (1),
* rejected (2) } OPTIONAL,
* supportedMech [1] MechType OPTIONAL,
* responseToken [2] OCTET STRING OPTIONAL,
* mechListMIC [3] OCTET STRING OPTIONAL
* }
*
* MechType ::= OBJECT IDENTIFIER
*
*
* In the context of this class only the NegTokenTarg is covered.
*/
public class NegTokenTarg extends SpnegoToken {
private BigInteger negotiationResult;
private ASN1ObjectIdentifier supportedMech;
private byte[] responseToken;
private byte[] mechListMic;
public NegTokenTarg() {
super(0x01, "NegTokenTarg");
}
// Override writeGss for NTLMSSP_AUTH since Samba does not like putting the OID for SPNEGO
protected void writeGss(Buffer buffer, ASN1EncodableVector negToken) throws IOException {
DERTaggedObject negotiationToken = new DERTaggedObject(true, 0x01, new DERSequence(negToken));
buffer.putRawBytes(negotiationToken.getEncoded());
}
public void write(Buffer buffer) throws SpnegoException {
try {
ASN1EncodableVector negTokenTarg = new ASN1EncodableVector();
if (negotiationResult != null) {
negTokenTarg.add(new DERTaggedObject(0x0, new ASN1Enumerated(negotiationResult)));
}
if (supportedMech != null) {
negTokenTarg.add(new DERTaggedObject(0x01, supportedMech));
}
if (responseToken != null && responseToken.length > 0) {
negTokenTarg.add(new DERTaggedObject(0x02, new DEROctetString(responseToken)));
}
if (mechListMic != null && mechListMic.length > 0) {
negTokenTarg.add(new DERTaggedObject(0x03, new DEROctetString(mechListMic)));
}
writeGss(buffer, negTokenTarg);
} catch (IOException e) {
throw new SpnegoException("Could not write NegTokenTarg to buffer", e);
}
}
public NegTokenTarg read(byte[] bytes) throws SpnegoException {
return read(new Buffer.PlainBuffer(bytes, Endian.LE));
}
private NegTokenTarg read(Buffer buffer) throws SpnegoException {
try (ASN1InputStream is = new ASN1InputStream(buffer.asInputStream())) {
ASN1Primitive instance = is.readObject();
parseSpnegoToken(instance);
} catch (IOException e) {
throw new SpnegoException("Could not read NegTokenTarg from buffer", e);
}
return this;
}
@Override
protected void parseTagged(ASN1TaggedObject asn1TaggedObject) throws SpnegoException {
switch (asn1TaggedObject.getTagNo()) {
case 0:
readNegResult(asn1TaggedObject.getObject());
break;
case 1:
readSupportedMech(asn1TaggedObject.getObject());
break;
case 2:
readResponseToken(asn1TaggedObject.getObject());
break;
case 3:
readMechListMIC(asn1TaggedObject.getObject());
break;
default:
throw new SpnegoException("Unknown Object Tag " + asn1TaggedObject.getTagNo() + " encountered.");
}
}
private void readResponseToken(ASN1Primitive responseToken) throws SpnegoException {
if (!(responseToken instanceof ASN1OctetString)) {
throw new SpnegoException("Expected the responseToken (OCTET_STRING) contents, not: " + responseToken);
}
this.responseToken = ((ASN1OctetString) responseToken).getOctets();
}
private void readMechListMIC(ASN1Primitive mic) throws SpnegoException {
if (!(mic instanceof ASN1OctetString)) {
throw new SpnegoException("Expected the responseToken (OCTET_STRING) contents, not: " + mic);
}
this.mechListMic = ((ASN1OctetString) mic).getOctets();
}
private void readSupportedMech(ASN1Primitive supportedMech) throws SpnegoException {
if (!(supportedMech instanceof ASN1ObjectIdentifier)) {
throw new SpnegoException("Expected the supportedMech (OBJECT IDENTIFIER) contents, not: " + supportedMech);
}
this.supportedMech = (ASN1ObjectIdentifier) supportedMech;
}
private void readNegResult(ASN1Primitive object) throws SpnegoException {
if (!(object instanceof ASN1Enumerated)) {
throw new SpnegoException("Expected the negResult (ENUMERATED) contents, not: " + supportedMech);
}
this.negotiationResult = ((ASN1Enumerated) object).getValue();
}
public BigInteger getNegotiationResult() {
return negotiationResult;
}
public void setNegotiationResult(BigInteger negotiationResult) {
this.negotiationResult = negotiationResult;
}
public ASN1ObjectIdentifier getSupportedMech() {
return supportedMech;
}
public void setSupportedMech(ASN1ObjectIdentifier supportedMech) {
this.supportedMech = supportedMech;
}
public byte[] getResponseToken() {
return responseToken;
}
public void setResponseToken(byte[] responseToken) {
this.responseToken = responseToken;
}
public byte[] getMechListMic() {
return mechListMic;
}
public void setMechListMic(byte[] mechListMic) {
this.mechListMic = mechListMic;
}
}