feat(jdk8): move files to new folder to avoid resources compiled.

jdkSrc/jdk8/com/sun/security/sasl/gsskerb/FactoryImpl.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * 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).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.security.sasl.gsskerb;
+
+import javax.security.sasl.*;
+import com.sun.security.sasl.util.PolicyUtils;
+
+import java.util.Map;
+import javax.security.auth.callback.CallbackHandler;
+
+/**
+  * Client/server factory for GSSAPI (Kerberos V5) SASL client/server mechs.
+  * See GssKrb5Client/GssKrb5Server for input requirements.
+  *
+  * @author Rosanna Lee
+  */
+public final class FactoryImpl implements SaslClientFactory, SaslServerFactory {
+    private static final String myMechs[] = {
+        "GSSAPI"};
+
+    private static final int mechPolicies[] = {
+        PolicyUtils.NOPLAINTEXT|PolicyUtils.NOANONYMOUS|PolicyUtils.NOACTIVE
+    };
+
+    private static final int GSS_KERB_V5 = 0;
+
+    public FactoryImpl() {
+    }
+
+    public SaslClient createSaslClient(String[] mechs,
+        String authorizationId,
+        String protocol,
+        String serverName,
+        Map<String,?> props,
+        CallbackHandler cbh) throws SaslException {
+
+            for (int i = 0; i < mechs.length; i++) {
+                if (mechs[i].equals(myMechs[GSS_KERB_V5])
+                    && PolicyUtils.checkPolicy(mechPolicies[GSS_KERB_V5], props)) {
+                    return new GssKrb5Client(
+                        authorizationId,
+                        protocol,
+                        serverName,
+                        props,
+                        cbh);
+                }
+            }
+            return null;
+    };
+
+    public SaslServer createSaslServer(String mech,
+        String protocol,
+        String serverName,
+        Map<String,?> props,
+        CallbackHandler cbh) throws SaslException {
+            if (mech.equals(myMechs[GSS_KERB_V5])
+                && PolicyUtils.checkPolicy(mechPolicies[GSS_KERB_V5], props)) {
+                if (cbh == null) {
+                    throw new SaslException(
+                "Callback handler with support for AuthorizeCallback required");
+                }
+                return new GssKrb5Server(
+                    protocol,
+                    serverName,
+                    props,
+                    cbh);
+            }
+            return null;
+    };
+
+    public String[] getMechanismNames(Map<String,?> props) {
+        return PolicyUtils.filterMechs(myMechs, mechPolicies, props);
+    }
+}

jdkSrc/jdk8/com/sun/security/sasl/gsskerb/GssKrb5Base.java

@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * 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).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+package com.sun.security.sasl.gsskerb;
+
+import java.util.Map;
+import java.util.logging.Level;
+import javax.security.sasl.*;
+import com.sun.security.sasl.util.AbstractSaslImpl;
+import org.ietf.jgss.*;
+
+abstract class GssKrb5Base extends AbstractSaslImpl {
+
+    private static final String KRB5_OID_STR = "1.2.840.113554.1.2.2";
+    protected static Oid KRB5_OID;
+    protected static final byte[] EMPTY = new byte[0];
+
+    static {
+        try {
+            KRB5_OID = new Oid(KRB5_OID_STR);
+        } catch (GSSException ignore) {}
+    }
+
+    protected GSSContext secCtx = null;
+    protected static final int JGSS_QOP = 0;    // unrelated to SASL QOP mask
+
+    protected GssKrb5Base(Map<String, ?> props, String className)
+        throws SaslException {
+        super(props, className);
+    }
+
+    /**
+     * Retrieves this mechanism's name.
+     *
+     * @return  The string "GSSAPI".
+     */
+    public String getMechanismName() {
+        return "GSSAPI";
+    }
+
+    public byte[] unwrap(byte[] incoming, int start, int len)
+        throws SaslException {
+        if (!completed) {
+            throw new IllegalStateException("GSSAPI authentication not completed");
+        }
+
+        // integrity will be true if either privacy or integrity negotiated
+        if (!integrity) {
+            throw new IllegalStateException("No security layer negotiated");
+        }
+
+        try {
+            MessageProp msgProp = new MessageProp(JGSS_QOP, false);
+            byte[] answer = secCtx.unwrap(incoming, start, len, msgProp);
+            if (privacy && !msgProp.getPrivacy()) {
+                throw new SaslException("Privacy not protected");
+            }
+            checkMessageProp("", msgProp);
+            if (logger.isLoggable(Level.FINEST)) {
+                traceOutput(myClassName, "KRB501:Unwrap", "incoming: ",
+                    incoming, start, len);
+                traceOutput(myClassName, "KRB502:Unwrap", "unwrapped: ",
+                    answer, 0, answer.length);
+            }
+            return answer;
+        } catch (GSSException e) {
+            throw new SaslException("Problems unwrapping SASL buffer", e);
+        }
+    }
+
+    public byte[] wrap(byte[] outgoing, int start, int len) throws SaslException {
+        if (!completed) {
+            throw new IllegalStateException("GSSAPI authentication not completed");
+        }
+
+        // integrity will be true if either privacy or integrity negotiated
+        if (!integrity) {
+            throw new IllegalStateException("No security layer negotiated");
+        }
+
+        // Generate GSS token
+        try {
+            MessageProp msgProp = new MessageProp(JGSS_QOP, privacy);
+            byte[] answer = secCtx.wrap(outgoing, start, len, msgProp);
+            if (logger.isLoggable(Level.FINEST)) {
+                traceOutput(myClassName, "KRB503:Wrap", "outgoing: ",
+                    outgoing, start, len);
+                traceOutput(myClassName, "KRB504:Wrap", "wrapped: ",
+                    answer, 0, answer.length);
+            }
+            return answer;
+
+        } catch (GSSException e) {
+            throw new SaslException("Problem performing GSS wrap", e);
+        }
+    }
+
+    public void dispose() throws SaslException {
+        if (secCtx != null) {
+            try {
+                secCtx.dispose();
+            } catch (GSSException e) {
+                throw new SaslException("Problem disposing GSS context", e);
+            }
+            secCtx = null;
+        }
+    }
+
+    protected void finalize() throws Throwable {
+        dispose();
+    }
+
+    void checkMessageProp(String label, MessageProp msgProp)
+            throws SaslException {
+        if (msgProp.isDuplicateToken()) {
+            throw new SaslException(label + "Duplicate token");
+        }
+        if (msgProp.isGapToken()) {
+            throw new SaslException(label + "Gap token");
+        }
+        if (msgProp.isOldToken()) {
+            throw new SaslException(label + "Old token");
+        }
+        if (msgProp.isUnseqToken()) {
+            throw new SaslException(label + "Token not in sequence");
+        }
+    }
+}

jdkSrc/jdk8/com/sun/security/sasl/gsskerb/GssKrb5Client.java

@@ -0,0 +1,331 @@
+/*
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * 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).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.security.sasl.gsskerb;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.logging.Level;
+import javax.security.sasl.*;
+
+// JAAS
+import javax.security.auth.callback.CallbackHandler;
+
+// JGSS
+import org.ietf.jgss.*;
+
+/**
+  * Implements the GSSAPI SASL client mechanism for Kerberos V5.
+  * (<A HREF="http://www.ietf.org/rfc/rfc2222.txt">RFC 2222</A>,
+  * <a HREF="http://www.ietf.org/internet-drafts/draft-ietf-cat-sasl-gssapi-04.txt">draft-ietf-cat-sasl-gssapi-04.txt</a>).
+  * It uses the Java Bindings for GSSAPI
+  * (<A HREF="http://www.ietf.org/rfc/rfc2853.txt">RFC 2853</A>)
+  * for getting GSSAPI/Kerberos V5 support.
+  *
+  * The client/server interactions are:
+  * C0: bind (GSSAPI, initial response)
+  * S0: sasl-bind-in-progress, challenge 1 (output of accept_sec_context or [])
+  * C1: bind (GSSAPI, response 1 (output of init_sec_context or []))
+  * S1: sasl-bind-in-progress challenge 2 (security layer, server max recv size)
+  * C2: bind (GSSAPI, response 2 (security layer, client max recv size, authzid))
+  * S2: bind success response
+  *
+  * Expects the client's credentials to be supplied from the
+  * javax.security.sasl.credentials property or from the thread's Subject.
+  * Otherwise the underlying KRB5 mech will attempt to acquire Kerberos creds
+  * by logging into Kerberos (via default TextCallbackHandler).
+  * These creds will be used for exchange with server.
+  *
+  * Required callbacks: none.
+  *
+  * Environment properties that affect behavior of implementation:
+  *
+  * javax.security.sasl.qop
+  * - quality of protection; list of auth, auth-int, auth-conf; default is "auth"
+  * javax.security.sasl.maxbuf
+  * - max receive buffer size; default is 65536
+  * javax.security.sasl.sendmaxbuffer
+  * - max send buffer size; default is 65536; (min with server max recv size)
+  *
+  * javax.security.sasl.server.authentication
+  * - "true" means require mutual authentication; default is "false"
+  *
+  * javax.security.sasl.credentials
+  * - an {@link org.ietf.jgss.GSSCredential} used for delegated authentication.
+  *
+  * @author Rosanna Lee
+  */
+
+final class GssKrb5Client extends GssKrb5Base implements SaslClient {
+    // ---------------- Constants -----------------
+    private static final String MY_CLASS_NAME = GssKrb5Client.class.getName();
+
+    private boolean finalHandshake = false;
+    private boolean mutual = false;       // default false
+    private byte[] authzID;
+
+    /**
+     * Creates a SASL mechanism with client credentials that it needs
+     * to participate in GSS-API/Kerberos v5 authentication exchange
+     * with the server.
+     */
+    GssKrb5Client(String authzID, String protocol, String serverName,
+        Map<String, ?> props, CallbackHandler cbh) throws SaslException {
+
+        super(props, MY_CLASS_NAME);
+
+        String service = protocol + "@" + serverName;
+        logger.log(Level.FINE, "KRB5CLNT01:Requesting service name: {0}",
+            service);
+
+        try {
+            GSSManager mgr = GSSManager.getInstance();
+
+            // Create the name for the requested service entity for Krb5 mech
+            GSSName acceptorName = mgr.createName(service,
+                GSSName.NT_HOSTBASED_SERVICE, KRB5_OID);
+
+            // Parse properties to check for supplied credentials
+            GSSCredential credentials = null;
+            if (props != null) {
+                Object prop = props.get(Sasl.CREDENTIALS);
+                if (prop != null && prop instanceof GSSCredential) {
+                    credentials = (GSSCredential) prop;
+                    logger.log(Level.FINE,
+                        "KRB5CLNT01:Using the credentials supplied in " +
+                        "javax.security.sasl.credentials");
+                }
+            }
+
+            // Create a context using credentials for Krb5 mech
+            secCtx = mgr.createContext(acceptorName,
+                KRB5_OID,   /* mechanism */
+                credentials, /* credentials */
+                GSSContext.INDEFINITE_LIFETIME);
+
+            // Request credential delegation when credentials have been supplied
+            if (credentials != null) {
+                secCtx.requestCredDeleg(true);
+            }
+
+            // Parse properties  to set desired context options
+            if (props != null) {
+                // Mutual authentication
+                String prop = (String)props.get(Sasl.SERVER_AUTH);
+                if (prop != null) {
+                    mutual = "true".equalsIgnoreCase(prop);
+                }
+            }
+            secCtx.requestMutualAuth(mutual);
+
+            // Always specify potential need for integrity and confidentiality
+            // Decision will be made during final handshake
+            secCtx.requestConf(true);
+            secCtx.requestInteg(true);
+
+        } catch (GSSException e) {
+            throw new SaslException("Failure to initialize security context", e);
+        }
+
+        if (authzID != null && authzID.length() > 0) {
+            try {
+                this.authzID = authzID.getBytes("UTF8");
+            } catch (IOException e) {
+                throw new SaslException("Cannot encode authorization ID", e);
+            }
+        }
+    }
+
+    public boolean hasInitialResponse() {
+        return true;
+    }
+
+    /**
+     * Processes the challenge data.
+     *
+     * The server sends a challenge data using which the client must
+     * process using GSS_Init_sec_context.
+     * As per RFC 2222, when GSS_S_COMPLETE is returned, we do
+     * an extra handshake to determine the negotiated security protection
+     * and buffer sizes.
+     *
+     * @param challengeData A non-null byte array containing the
+     * challenge data from the server.
+     * @return A non-null byte array containing the response to be
+     * sent to the server.
+     */
+    public byte[] evaluateChallenge(byte[] challengeData) throws SaslException {
+        if (completed) {
+            throw new IllegalStateException(
+                "GSSAPI authentication already complete");
+        }
+
+        if (finalHandshake) {
+            return doFinalHandshake(challengeData);
+        } else {
+
+            // Security context not established yet; continue with init
+
+            try {
+                byte[] gssOutToken = secCtx.initSecContext(challengeData,
+                    0, challengeData.length);
+                if (logger.isLoggable(Level.FINER)) {
+                    traceOutput(MY_CLASS_NAME, "evaluteChallenge",
+                        "KRB5CLNT02:Challenge: [raw]", challengeData);
+                    traceOutput(MY_CLASS_NAME, "evaluateChallenge",
+                        "KRB5CLNT03:Response: [after initSecCtx]", gssOutToken);
+                }
+
+                if (secCtx.isEstablished()) {
+                    finalHandshake = true;
+                    if (gssOutToken == null) {
+                        // RFC 2222 7.2.1:  Client responds with no data
+                        return EMPTY;
+                    }
+                }
+
+                return gssOutToken;
+            } catch (GSSException e) {
+                throw new SaslException("GSS initiate failed", e);
+            }
+        }
+    }
+
+    private byte[] doFinalHandshake(byte[] challengeData) throws SaslException {
+        try {
+            // Security context already established. challengeData
+            // should contain security layers and server's maximum buffer size
+
+            if (logger.isLoggable(Level.FINER)) {
+                traceOutput(MY_CLASS_NAME, "doFinalHandshake",
+                    "KRB5CLNT04:Challenge [raw]:", challengeData);
+            }
+
+            if (challengeData.length == 0) {
+                // Received S0, should return []
+                return EMPTY;
+            }
+
+            // Received S1 (security layer, server max recv size)
+
+            MessageProp msgProp = new MessageProp(false);
+            byte[] gssOutToken = secCtx.unwrap(challengeData, 0,
+                challengeData.length, msgProp);
+            checkMessageProp("Handshake failure: ", msgProp);
+
+            // First octet is a bit-mask specifying the protections
+            // supported by the server
+            if (logger.isLoggable(Level.FINE)) {
+                if (logger.isLoggable(Level.FINER)) {
+                    traceOutput(MY_CLASS_NAME, "doFinalHandshake",
+                        "KRB5CLNT05:Challenge [unwrapped]:", gssOutToken);
+                }
+                logger.log(Level.FINE, "KRB5CLNT06:Server protections: {0}",
+                    new Byte(gssOutToken[0]));
+            }
+
+            // Client selects preferred protection
+            // qop is ordered list of qop values
+            byte selectedQop = findPreferredMask(gssOutToken[0], qop);
+            if (selectedQop == 0) {
+                throw new SaslException(
+                    "No common protection layer between client and server");
+            }
+
+            if ((selectedQop&PRIVACY_PROTECTION) != 0) {
+                privacy = true;
+                integrity = true;
+            } else if ((selectedQop&INTEGRITY_ONLY_PROTECTION) != 0) {
+                integrity = true;
+            }
+
+            // 2nd-4th octets specifies maximum buffer size expected by
+            // server (in network byte order)
+            int srvMaxBufSize = networkByteOrderToInt(gssOutToken, 1, 3);
+
+            // Determine the max send buffer size based on what the
+            // server is able to receive and our specified max
+            sendMaxBufSize = (sendMaxBufSize == 0) ? srvMaxBufSize :
+                Math.min(sendMaxBufSize, srvMaxBufSize);
+
+            // Update context to limit size of returned buffer
+            rawSendSize = secCtx.getWrapSizeLimit(JGSS_QOP, privacy,
+                sendMaxBufSize);
+
+            if (logger.isLoggable(Level.FINE)) {
+                logger.log(Level.FINE,
+"KRB5CLNT07:Client max recv size: {0}; server max recv size: {1}; rawSendSize: {2}",
+                    new Object[] {new Integer(recvMaxBufSize),
+                                  new Integer(srvMaxBufSize),
+                                  new Integer(rawSendSize)});
+            }
+
+            // Construct negotiated security layers and client's max
+            // receive buffer size and authzID
+            int len = 4;
+            if (authzID != null) {
+                len += authzID.length;
+            }
+
+            byte[] gssInToken = new byte[len];
+            gssInToken[0] = selectedQop;
+
+            if (logger.isLoggable(Level.FINE)) {
+                logger.log(Level.FINE,
+            "KRB5CLNT08:Selected protection: {0}; privacy: {1}; integrity: {2}",
+                    new Object[]{new Byte(selectedQop),
+                                 Boolean.valueOf(privacy),
+                                 Boolean.valueOf(integrity)});
+            }
+
+            intToNetworkByteOrder(recvMaxBufSize, gssInToken, 1, 3);
+            if (authzID != null) {
+                // copy authorization id
+                System.arraycopy(authzID, 0, gssInToken, 4, authzID.length);
+                logger.log(Level.FINE, "KRB5CLNT09:Authzid: {0}", authzID);
+            }
+
+            if (logger.isLoggable(Level.FINER)) {
+                traceOutput(MY_CLASS_NAME, "doFinalHandshake",
+                    "KRB5CLNT10:Response [raw]", gssInToken);
+            }
+
+            gssOutToken = secCtx.wrap(gssInToken,
+                0, gssInToken.length,
+                new MessageProp(0 /* qop */, false /* privacy */));
+
+            if (logger.isLoggable(Level.FINER)) {
+                traceOutput(MY_CLASS_NAME, "doFinalHandshake",
+                    "KRB5CLNT11:Response [after wrap]", gssOutToken);
+            }
+
+            completed = true;  // server authenticated
+
+            return gssOutToken;
+        } catch (GSSException e) {
+            throw new SaslException("Final handshake failed", e);
+        }
+    }
+}

jdkSrc/jdk8/com/sun/security/sasl/gsskerb/GssKrb5Server.java

@@ -0,0 +1,367 @@
+/*
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * 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).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.security.sasl.gsskerb;
+
+import javax.security.sasl.*;
+import java.io.*;
+import java.util.Map;
+import java.util.logging.Level;
+
+// JAAS
+import javax.security.auth.callback.*;
+
+// JGSS
+import org.ietf.jgss.*;
+
+/**
+  * Implements the GSSAPI SASL server mechanism for Kerberos V5.
+  * (<A HREF="http://www.ietf.org/rfc/rfc2222.txt">RFC 2222</A>,
+  * <a HREF="http://www.ietf.org/internet-drafts/draft-ietf-cat-sasl-gssapi-00.txt">draft-ietf-cat-sasl-gssapi-00.txt</a>).
+  *
+  * Expects thread's Subject to contain server's Kerberos credentials
+  * - If not, underlying KRB5 mech will attempt to acquire Kerberos creds
+  *   by logging into Kerberos (via default TextCallbackHandler).
+  * - These creds will be used for exchange with client.
+  *
+  * Required callbacks:
+  * - AuthorizeCallback
+  *      handler must verify that authid/authzids are allowed and set
+  *      authorized ID to be the canonicalized authzid (if applicable).
+  *
+  * Environment properties that affect behavior of implementation:
+  *
+  * javax.security.sasl.qop
+  * - quality of protection; list of auth, auth-int, auth-conf; default is "auth"
+  * javax.security.sasl.maxbuf
+  * - max receive buffer size; default is 65536
+  * javax.security.sasl.sendmaxbuffer
+  * - max send buffer size; default is 65536; (min with client max recv size)
+  *
+  * @author Rosanna Lee
+  */
+final class GssKrb5Server extends GssKrb5Base implements SaslServer {
+    private static final String MY_CLASS_NAME = GssKrb5Server.class.getName();
+
+    private int handshakeStage = 0;
+    private String peer;
+    private String me;
+    private String authzid;
+    private CallbackHandler cbh;
+
+    // When serverName is null, the server will be unbound. We need to save and
+    // check the protocol name after the context is established. This value
+    // will be null if serverName is not null.
+    private final String protocolSaved;
+    /**
+     * Creates a SASL mechanism with server credentials that it needs
+     * to participate in GSS-API/Kerberos v5 authentication exchange
+     * with the client.
+     */
+    GssKrb5Server(String protocol, String serverName,
+        Map<String, ?> props, CallbackHandler cbh) throws SaslException {
+
+        super(props, MY_CLASS_NAME);
+
+        this.cbh = cbh;
+
+        String service;
+        if (serverName == null) {
+            protocolSaved = protocol;
+            service = null;
+        } else {
+            protocolSaved = null;
+            service = protocol + "@" + serverName;
+        }
+
+        logger.log(Level.FINE, "KRB5SRV01:Using service name: {0}", service);
+
+        try {
+            GSSManager mgr = GSSManager.getInstance();
+
+            // Create the name for the requested service entity for Krb5 mech
+            GSSName serviceName = service == null ? null:
+                    mgr.createName(service, GSSName.NT_HOSTBASED_SERVICE, KRB5_OID);
+
+            GSSCredential cred = mgr.createCredential(serviceName,
+                GSSCredential.INDEFINITE_LIFETIME,
+                KRB5_OID, GSSCredential.ACCEPT_ONLY);
+
+            // Create a context using the server's credentials
+            secCtx = mgr.createContext(cred);
+
+            if ((allQop&INTEGRITY_ONLY_PROTECTION) != 0) {
+                // Might need integrity
+                secCtx.requestInteg(true);
+            }
+
+            if ((allQop&PRIVACY_PROTECTION) != 0) {
+                // Might need privacy
+                secCtx.requestConf(true);
+            }
+        } catch (GSSException e) {
+            throw new SaslException("Failure to initialize security context", e);
+        }
+        logger.log(Level.FINE, "KRB5SRV02:Initialization complete");
+    }
+
+
+    /**
+     * Processes the response data.
+     *
+     * The client sends response data to which the server must
+     * process using GSS_accept_sec_context.
+     * As per RFC 2222, the GSS authenication completes (GSS_S_COMPLETE)
+     * we do an extra hand shake to determine the negotiated security protection
+     * and buffer sizes.
+     *
+     * @param responseData A non-null but possible empty byte array containing the
+     * response data from the client.
+     * @return A non-null byte array containing the challenge to be
+     * sent to the client, or null when no more data is to be sent.
+     */
+    public byte[] evaluateResponse(byte[] responseData) throws SaslException {
+        if (completed) {
+            throw new SaslException(
+                "SASL authentication already complete");
+        }
+
+        if (logger.isLoggable(Level.FINER)) {
+            traceOutput(MY_CLASS_NAME, "evaluateResponse",
+                "KRB5SRV03:Response [raw]:", responseData);
+        }
+
+        switch (handshakeStage) {
+        case 1:
+            return doHandshake1(responseData);
+
+        case 2:
+            return doHandshake2(responseData);
+
+        default:
+            // Security context not established yet; continue with accept
+
+            try {
+                byte[] gssOutToken = secCtx.acceptSecContext(responseData,
+                    0, responseData.length);
+
+                if (logger.isLoggable(Level.FINER)) {
+                    traceOutput(MY_CLASS_NAME, "evaluateResponse",
+                        "KRB5SRV04:Challenge: [after acceptSecCtx]", gssOutToken);
+                }
+
+                if (secCtx.isEstablished()) {
+                    handshakeStage = 1;
+
+                    peer = secCtx.getSrcName().toString();
+                    me = secCtx.getTargName().toString();
+
+                    logger.log(Level.FINE,
+                            "KRB5SRV05:Peer name is : {0}, my name is : {1}",
+                            new Object[]{peer, me});
+
+                    // me might take the form of proto@host or proto/host
+                    if (protocolSaved != null &&
+                            !protocolSaved.equalsIgnoreCase(me.split("[/@]")[0])) {
+                        throw new SaslException(
+                                "GSS context targ name protocol error: " + me);
+                    }
+
+                    if (gssOutToken == null) {
+                        return doHandshake1(EMPTY);
+                    }
+                }
+
+                return gssOutToken;
+            } catch (GSSException e) {
+                throw new SaslException("GSS initiate failed", e);
+            }
+        }
+    }
+
+    private byte[] doHandshake1(byte[] responseData) throws SaslException {
+        try {
+            // Security context already established. responseData
+            // should contain no data
+            if (responseData != null && responseData.length > 0) {
+                throw new SaslException(
+                    "Handshake expecting no response data from server");
+            }
+
+            // Construct 4 octets of data:
+            // First octet contains bitmask specifying protections supported
+            // 2nd-4th octets contains max receive buffer of server
+
+            byte[] gssInToken = new byte[4];
+            gssInToken[0] = allQop;
+            intToNetworkByteOrder(recvMaxBufSize, gssInToken, 1, 3);
+
+            if (logger.isLoggable(Level.FINE)) {
+                logger.log(Level.FINE,
+                    "KRB5SRV06:Supported protections: {0}; recv max buf size: {1}",
+                    new Object[]{new Byte(allQop),
+                                 new Integer(recvMaxBufSize)});
+            }
+
+            handshakeStage = 2;  // progress to next stage
+
+            if (logger.isLoggable(Level.FINER)) {
+                traceOutput(MY_CLASS_NAME, "doHandshake1",
+                    "KRB5SRV07:Challenge [raw]", gssInToken);
+            }
+
+            byte[] gssOutToken = secCtx.wrap(gssInToken, 0, gssInToken.length,
+                new MessageProp(0 /* gop */, false /* privacy */));
+
+            if (logger.isLoggable(Level.FINER)) {
+                traceOutput(MY_CLASS_NAME, "doHandshake1",
+                    "KRB5SRV08:Challenge [after wrap]", gssOutToken);
+            }
+            return gssOutToken;
+
+        } catch (GSSException e) {
+            throw new SaslException("Problem wrapping handshake1", e);
+        }
+    }
+
+    private byte[] doHandshake2(byte[] responseData) throws SaslException {
+        try {
+            // Expecting 4 octets from client selected protection
+            // and client's receive buffer size
+            MessageProp msgProp = new MessageProp(false);
+            byte[] gssOutToken = secCtx.unwrap(responseData, 0,
+                responseData.length, msgProp);
+            checkMessageProp("Handshake failure: ", msgProp);
+
+            if (logger.isLoggable(Level.FINER)) {
+                traceOutput(MY_CLASS_NAME, "doHandshake2",
+                    "KRB5SRV09:Response [after unwrap]", gssOutToken);
+            }
+
+            // First octet is a bit-mask specifying the selected protection
+            byte selectedQop = gssOutToken[0];
+            if ((selectedQop&allQop) == 0) {
+                throw new SaslException("Client selected unsupported protection: "
+                    + selectedQop);
+            }
+            if ((selectedQop&PRIVACY_PROTECTION) != 0) {
+                privacy = true;
+                integrity = true;
+            } else if ((selectedQop&INTEGRITY_ONLY_PROTECTION) != 0) {
+                integrity = true;
+            }
+
+            // 2nd-4th octets specifies maximum buffer size expected by
+            // client (in network byte order). This is the server's send
+            // buffer maximum.
+            int clntMaxBufSize = networkByteOrderToInt(gssOutToken, 1, 3);
+
+            // Determine the max send buffer size based on what the
+            // client is able to receive and our specified max
+            sendMaxBufSize = (sendMaxBufSize == 0) ? clntMaxBufSize :
+                Math.min(sendMaxBufSize, clntMaxBufSize);
+
+            // Update context to limit size of returned buffer
+            rawSendSize = secCtx.getWrapSizeLimit(JGSS_QOP, privacy,
+                sendMaxBufSize);
+
+            if (logger.isLoggable(Level.FINE)) {
+                logger.log(Level.FINE,
+            "KRB5SRV10:Selected protection: {0}; privacy: {1}; integrity: {2}",
+                    new Object[]{new Byte(selectedQop),
+                                 Boolean.valueOf(privacy),
+                                 Boolean.valueOf(integrity)});
+                logger.log(Level.FINE,
+"KRB5SRV11:Client max recv size: {0}; server max send size: {1}; rawSendSize: {2}",
+                    new Object[] {new Integer(clntMaxBufSize),
+                                  new Integer(sendMaxBufSize),
+                                  new Integer(rawSendSize)});
+            }
+
+            // Get authorization identity, if any
+            if (gssOutToken.length > 4) {
+                try {
+                    authzid = new String(gssOutToken, 4,
+                        gssOutToken.length - 4, "UTF-8");
+                } catch (UnsupportedEncodingException uee) {
+                    throw new SaslException ("Cannot decode authzid", uee);
+                }
+            } else {
+                authzid = peer;
+            }
+            logger.log(Level.FINE, "KRB5SRV12:Authzid: {0}", authzid);
+
+            AuthorizeCallback acb = new AuthorizeCallback(peer, authzid);
+
+            // In Kerberos, realm is embedded in peer name
+            cbh.handle(new Callback[] {acb});
+            if (acb.isAuthorized()) {
+                authzid = acb.getAuthorizedID();
+                completed = true;
+            } else {
+                // Authorization failed
+                throw new SaslException(peer +
+                    " is not authorized to connect as " + authzid);
+            }
+
+            return null;
+        } catch (GSSException e) {
+            throw new SaslException("Final handshake step failed", e);
+        } catch (IOException e) {
+            throw new SaslException("Problem with callback handler", e);
+        } catch (UnsupportedCallbackException e) {
+            throw new SaslException("Problem with callback handler", e);
+        }
+    }
+
+    public String getAuthorizationID() {
+        if (completed) {
+            return authzid;
+        } else {
+            throw new IllegalStateException("Authentication incomplete");
+        }
+    }
+
+    public Object getNegotiatedProperty(String propName) {
+        if (!completed) {
+            throw new IllegalStateException("Authentication incomplete");
+        }
+
+        Object result;
+        switch (propName) {
+            case Sasl.BOUND_SERVER_NAME:
+                try {
+                    // me might take the form of proto@host or proto/host
+                    result = me.split("[/@]")[1];
+                } catch (Exception e) {
+                    result = null;
+                }
+                break;
+            default:
+                result = super.getNegotiatedProperty(propName);
+        }
+        return result;
+    }
+}