Method establishContext

examples/gssClient.java:151–216

Establish a GSS-API context with example server, calling initSecContext() until context.isEstablished() is true. This method also tests exporting and re-importing the security context.

(InputStream serverIn,
            OutputStream serverOut)

     * context.
     **/
    public static void establishContext(InputStream serverIn,
            OutputStream serverOut) {

        byte[] inToken  = new byte[0];
        byte[] outToken = null;
        int err = 0;

        try {
            GSSName peer = mgr.createName(serviceName,
                    GSSName.NT_HOSTBASED_SERVICE);

            context = mgr.createContext(peer, mech, clientCred,
                    GSSContext.INDEFINITE_LIFETIME);

            context.requestConf(true);
            context.requestReplayDet(true);
            context.requestMutualAuth(true);

            while (!context.isEstablished()) {

                System.out.println("Calling initSecContext");
                outToken = context.initSecContext(inToken, 0, inToken.length);

                if (outToken != null && outToken.length > 0) {
                    err = GssUtil.WriteToken(serverOut, outToken);
                    if (err == 0) {
                        System.out.println("Sent token to server...");
                    } else {
                        System.out.println("Error sending token to server...");
                    }
                }

                if (!context.isEstablished()) {
                    inToken = GssUtil.ReadToken(serverIn); 
                    System.out.println("Received token from server... ");
                }
            }

            GSSName peerName = context.getTargName();
            GSSName srcName = context.getSrcName();
            System.out.println("Security context established with " + peer);
            GssUtil.printSubString("Source Name", srcName.toString());
            GssUtil.printSubString("Mechanism", context.getMech().toString());
            GssUtil.printSubString("AnonymityState", context.getAnonymityState());
            GssUtil.printSubString("ConfState", context.getConfState());
            GssUtil.printSubString("CredDelegState", context.getCredDelegState());
            GssUtil.printSubString("IntegState", context.getIntegState());
            GssUtil.printSubString("Lifetime", context.getLifetime());
            GssUtil.printSubString("MutualAuthState", context.getMutualAuthState());
            GssUtil.printSubString("ReplayDetState", context.getReplayDetState());
            GssUtil.printSubString("SequenceDetState", context.getSequenceDetState());
            GssUtil.printSubString("Is initiator?", context.isInitiator());
            GssUtil.printSubString("Is Prot Ready?", context.isProtReady());

            /* Test exporting/importing established security context */
            byte[] exportedContext = context.export();
            context = mgr.createContext(exportedContext);
            GSSName serverInfo2 = context.getTargName();