io.logspace.agent.shaded.apache.http.impl.auth.NegotiateScheme Maven / Gradle / Ivy
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* Negotiate
*/
public String getSchemeName() {
return "Negotiate";
}
@Override
public Header authenticate(
final Credentials credentials,
final HttpRequest request) throws AuthenticationException {
return authenticate(credentials, request, null);
}
/**
* Produces Negotiate authorization Header based on token created by
* processChallenge.
*
* @param credentials Never used be the Negotiate scheme but must be provided to
* satisfy common-httpclient API. Credentials from JAAS will be used instead.
* @param request The request being authenticated
*
* @throws AuthenticationException if authorisation string cannot
* be generated due to an authentication failure
*
* @return an Negotiate authorisation Header
*/
@Override
public Header authenticate(
final Credentials credentials,
final HttpRequest request,
final HttpContext context) throws AuthenticationException {
return super.authenticate(credentials, request, context);
}
@Override
protected byte[] generateToken(final byte[] input, final String authServer) throws GSSException {
/* Using the SPNEGO OID is the correct method.
* Kerberos v5 works for IIS but not JBoss. Unwrapping
* the initial token when using SPNEGO OID looks like what is
* described here...
*
* http://msdn.microsoft.com/en-us/library/ms995330.aspx
*
* Another helpful URL...
*
* http://publib.boulder.ibm.com/infocenter/wasinfo/v7r0/index.jsp?topic=/com.ibm.websphere.express.doc/info/exp/ae/tsec_SPNEGO_token.html
*
* Unfortunately SPNEGO is JRE >=1.6.
*/
/** Try SPNEGO by default, fall back to Kerberos later if error */
Oid negotiationOid = new Oid(SPNEGO_OID);
byte[] token = input;
boolean tryKerberos = false;
try {
token = generateGSSToken(token, negotiationOid, authServer);
} catch (final GSSException ex){
// BAD MECH means we are likely to be using 1.5, fall back to Kerberos MECH.
// Rethrow any other exception.
if (ex.getMajor() == GSSException.BAD_MECH ){
log.debug("GSSException BAD_MECH, retry with Kerberos MECH");
tryKerberos = true;
} else {
throw ex;
}
}
if (tryKerberos){
/* Kerberos v5 GSS-API mechanism defined in RFC 1964.*/
log.debug("Using Kerberos MECH " + KERBEROS_OID);
negotiationOid = new Oid(KERBEROS_OID);
token = generateGSSToken(token, negotiationOid, authServer);
/*
* IIS accepts Kerberos and SPNEGO tokens. Some other servers Jboss, Glassfish?
* seem to only accept SPNEGO. Below wraps Kerberos into SPNEGO token.
*/
if (token != null && spengoGenerator != null) {
try {
token = spengoGenerator.generateSpnegoDERObject(token);
} catch (final IOException ex) {
log.error(ex.getMessage(), ex);
}
}
}
return token;
}
/**
* Returns the authentication parameter with the given name, if available.
*
* There are no valid parameters for Negotiate authentication so this
* method always returns null.
*
* @param name The name of the parameter to be returned
*
* @return the parameter with the given name
*/
public String getParameter(final String name) {
Args.notNull(name, "Parameter name");
return null;
}
/**
* The concept of an authentication realm is not supported by the Negotiate
* authentication scheme. Always returns null.
*
* @return null
*/
public String getRealm() {
return null;
}
/**
* Returns true.
* Negotiate authentication scheme is connection based.
*
* @return true.
*/
public boolean isConnectionBased() {
return true;
}
}