import java.util.stream.Collectors;

import org.apache.http.auth.AuthScheme;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.apache.http.auth.NTCredentials;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.auth.DigestScheme;
import org.apache.http.impl.auth.NTLMScheme;
import org.apache.logging.log4j.LogManager;

        DcerpcHandle handle = null;
        LsaPolicyHandle policyHandle = null;

        synchronized (sid_cache) {
            try {
                handle = DcerpcHandle.getHandle("ncacn_np:" + authorityServerName + "[\\PIPE\\lsarpc]", auth);
                String server = authorityServerName;

    }

    synchronized SmbSession getSmbSession(final NtlmPasswordAuthentication auth) {
        SmbSession ssn;
        long now;

        ListIterator iter = sessions.listIterator();
        while (iter.hasNext()) {
            ssn = (SmbSession) iter.next();
            if (ssn.matches(auth)) {
                ssn.auth = auth;
                return ssn;
            }
        }

    void anonymousGuestCredentials() throws Exception {
        setupNegotiateStubs();

        NtlmPasswordAuthenticator auth = mock(NtlmPasswordAuthenticator.class);
        when(auth.isAnonymous()).thenReturn(true);
        when(auth.isGuest()).thenReturn(true);
        when(auth.getUsername()).thenReturn("guest");
        when(auth.getUserDomain()).thenReturn("dom");

        // Construct

	// Get current object layer instance.
	objectAPI := newObjectLayerFn()
	if objectAPI == nil || globalNotificationSys == nil {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return nil, auth.Credentials{}
	}

	for _, action := range actions {
		// Validate request signature.

                macSigningKey = new byte[40];
                auth.getUserSessionKey(transport.server.encryptionKey, macSigningKey, 0);
                System.arraycopy(auth.getUnicodeHash(transport.server.encryptionKey), 0, macSigningKey, 16, 24);
                break;
            case 3:
            case 4:
            case 5:
                macSigningKey = new byte[16];

        transport = new SmbTransportImpl(context, address, 445, null, 0, false);
    }

    /**
     * Test that pre-auth integrity hash is properly synchronized
     */
    @Test
    @DisplayName("Pre-auth integrity hash should be thread-safe")
    void testPreauthHashThreadSafety() throws Exception {
        // Setup SMB3.1.1 negotiation

        if (session.transport.server.security == SECURITY_SHARE && (session.auth.hashesExternal || session.auth.password.length() > 0)) {

            if (session.transport.server.encryptedPasswords) {
                // encrypted
                password = session.auth.getAnsiHash(session.transport.server.encryptionKey);
                passwordLength = password.length;

    void matchesBehavior() {
        // Two distinct auth instances
        NtlmPasswordAuthentication a1 = new NtlmPasswordAuthentication("DOM", "user", "pwd");
        NtlmPasswordAuthentication a2 = new NtlmPasswordAuthentication("DOM", "user", "pwd");
        SmbSession s1 = new SmbSession(addr, 445, inet, 0, a1);
        SmbSession s2 = new SmbSession(addr, 445, inet, 0, a2);
        // same auth instance => matches
        assertTrue(s1.matches(a1));

//     - http://docs.aws.amazon.com/AmazonS3/latest/dev/auth-request-sig-v2.html
// returns true if matches, false otherwise. if error is not nil then it is always false

func validateV2AuthHeader(r *http.Request) (auth.Credentials, APIErrorCode) {
	var cred auth.Credentials
	v2Auth := r.Header.Get(xhttp.Authorization)
	if v2Auth == "" {
		return cred, ErrAuthHeaderEmpty
	}