com.hierynomus.spnego.SpnegoToken Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of smbj Show documentation
Show all versions of smbj Show documentation
SMB2 protocol library for communication with Windows servers
The newest version!
/*
* 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.asn1.ASN1OutputStream;
import com.hierynomus.asn1.encodingrules.der.DEREncoder;
import com.hierynomus.asn1.types.ASN1Object;
import com.hierynomus.asn1.types.ASN1Tag;
import com.hierynomus.asn1.types.constructed.ASN1Sequence;
import com.hierynomus.asn1.types.constructed.ASN1TaggedObject;
import com.hierynomus.protocol.commons.buffer.Buffer;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import static com.hierynomus.spnego.ObjectIdentifiers.SPNEGO;
public abstract class SpnegoToken {
private int tokenTagNo;
private String tokenName;
public SpnegoToken(int tokenTagNo, String tokenName) {
this.tokenTagNo = tokenTagNo;
this.tokenName = tokenName;
}
protected void writeGss(Buffer> buffer, ASN1Object> negToken) throws IOException {
ASN1TaggedObject negotiationToken = new ASN1TaggedObject(ASN1Tag.contextSpecific(tokenTagNo).constructed(), negToken);
@SuppressWarnings("rawtypes")
List implicitSeqGssApi = new ArrayList<>();
implicitSeqGssApi.add(SPNEGO);
implicitSeqGssApi.add(negotiationToken);
ASN1TaggedObject token = new ASN1TaggedObject(ASN1Tag.application(0), new ASN1Sequence(implicitSeqGssApi), false);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try (ASN1OutputStream out = new ASN1OutputStream(new DEREncoder(), baos)) {
out.writeObject(token);
}
buffer.putRawBytes(baos.toByteArray());
}
protected void parseSpnegoToken(ASN1Object> spnegoToken) throws SpnegoException {
if (!(spnegoToken instanceof ASN1TaggedObject) || ((ASN1TaggedObject) spnegoToken).getTagNo() != tokenTagNo) {
throw new SpnegoException(
"Expected to find the " + tokenName + " (CHOICE [" + tokenTagNo + "]) header, not: " + spnegoToken);
}
ASN1Object> negToken = ((ASN1TaggedObject) spnegoToken).getObject();
if (!(negToken instanceof ASN1Sequence)) {
throw new SpnegoException("Expected a " + tokenName + " (SEQUENCE), not: " + negToken);
}
for (ASN1Object> asn1Object : (ASN1Sequence) negToken) {
if (!(asn1Object instanceof ASN1TaggedObject)) {
throw new SpnegoException(
"Expected an ASN.1 TaggedObject as " + tokenName + " contents, not: " + asn1Object);
}
ASN1TaggedObject asn1TaggedObject = (ASN1TaggedObject) asn1Object;
parseTagged(asn1TaggedObject);
}
}
public abstract void write(Buffer> buffer) throws SpnegoException;
protected abstract void parseTagged(ASN1TaggedObject asn1TaggedObject) throws SpnegoException;
}