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package sun.net.www.protocol.http.spnego;
import com.sun.security.jgss.ExtendedGSSContext;
import java.io.IOException;
import org.ietf.jgss.GSSContext;
import org.ietf.jgss.GSSException;
import org.ietf.jgss.GSSName;
import org.ietf.jgss.Oid;
import sun.net.www.protocol.http.HttpCallerInfo;
import sun.net.www.protocol.http.Negotiator;
import sun.security.jgss.GSSManagerImpl;
import sun.security.jgss.GSSUtil;
import sun.security.jgss.HttpCaller;
This class encapsulates all JAAS and JGSS API calls in a separate class
outside NegotiateAuthentication.java so that J2SE build can go smoothly
without the presence of it.
Author: weijun.wang@sun.com Since: 1.6
/**
* This class encapsulates all JAAS and JGSS API calls in a separate class
* outside NegotiateAuthentication.java so that J2SE build can go smoothly
* without the presence of it.
*
* @author weijun.wang@sun.com
* @since 1.6
*/
public class NegotiatorImpl extends Negotiator {
private static final boolean DEBUG =
java.security.AccessController.doPrivileged(
new sun.security.action.GetBooleanAction("sun.security.krb5.debug"));
private GSSContext context;
private byte[] oneToken;
Initialize the object, which includes:
- Find out what GSS mechanism to use from the system property
http.negotiate.mechanism.oid, defaults SPNEGO
- Creating the GSSName for the target host, "HTTP/"+hostname
- Creating GSSContext
- A first call to initSecContext
/**
* Initialize the object, which includes:<ul>
* <li>Find out what GSS mechanism to use from the system property
* <code>http.negotiate.mechanism.oid</code>, defaults SPNEGO
* <li>Creating the GSSName for the target host, "HTTP/"+hostname
* <li>Creating GSSContext
* <li>A first call to initSecContext</ul>
*/
private void init(HttpCallerInfo hci) throws GSSException {
final Oid oid;
if (hci.scheme.equalsIgnoreCase("Kerberos")) {
// we can only use Kerberos mech when the scheme is kerberos
oid = GSSUtil.GSS_KRB5_MECH_OID;
} else {
String pref = java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<String>() {
public String run() {
return System.getProperty(
"http.auth.preference",
"spnego");
}
});
if (pref.equalsIgnoreCase("kerberos")) {
oid = GSSUtil.GSS_KRB5_MECH_OID;
} else {
// currently there is no 3rd mech we can use
oid = GSSUtil.GSS_SPNEGO_MECH_OID;
}
}
GSSManagerImpl manager = new GSSManagerImpl(
new HttpCaller(hci));
// RFC 4559 4.1 uses uppercase service name "HTTP".
// RFC 4120 6.2.1 demands the host be lowercase
String peerName = "HTTP@" + hci.host.toLowerCase();
GSSName serverName = manager.createName(peerName,
GSSName.NT_HOSTBASED_SERVICE);
context = manager.createContext(serverName,
oid,
null,
GSSContext.DEFAULT_LIFETIME);
// Always respect delegation policy in HTTP/SPNEGO.
if (context instanceof ExtendedGSSContext) {
((ExtendedGSSContext)context).requestDelegPolicy(true);
}
oneToken = context.initSecContext(new byte[0], 0, 0);
}
Constructor
Throws: - IOException – If negotiator cannot be constructed
/**
* Constructor
* @throws java.io.IOException If negotiator cannot be constructed
*/
public NegotiatorImpl(HttpCallerInfo hci) throws IOException {
try {
init(hci);
} catch (GSSException e) {
if (DEBUG) {
System.out.println("Negotiate support not initiated, will " +
"fallback to other scheme if allowed. Reason:");
e.printStackTrace();
}
IOException ioe = new IOException("Negotiate support not initiated");
ioe.initCause(e);
throw ioe;
}
}
Return the first token of GSS, in SPNEGO, it's called NegTokenInit
Returns: the first token
/**
* Return the first token of GSS, in SPNEGO, it's called NegTokenInit
* @return the first token
*/
@Override
public byte[] firstToken() {
return oneToken;
}
Return the rest tokens of GSS, in SPNEGO, it's called NegTokenTarg
Params: - token – the token received from server
Throws: - IOException – if the token cannot be created successfully
Returns: the next token
/**
* Return the rest tokens of GSS, in SPNEGO, it's called NegTokenTarg
* @param token the token received from server
* @return the next token
* @throws java.io.IOException if the token cannot be created successfully
*/
@Override
public byte[] nextToken(byte[] token) throws IOException {
try {
return context.initSecContext(token, 0, token.length);
} catch (GSSException e) {
if (DEBUG) {
System.out.println("Negotiate support cannot continue. Reason:");
e.printStackTrace();
}
IOException ioe = new IOException("Negotiate support cannot continue");
ioe.initCause(e);
throw ioe;
}
}
}