return ( this.negotiatedFlags2 & SmbConstants.FLAGS2_SECURITY_SIGNATURES ) == SmbConstants.FLAGS2_SECURITY_SIGNATURES;
    }


    @Override
    public boolean isValid ( CIFSContext ctx, SmbNegotiationRequest req ) {
        if ( getDialectIndex() > 10 ) {
            return false;
        }

        if ( ( this.server.scapabilities & SmbConstants.CAP_EXTENDED_SECURITY ) != SmbConstants.CAP_EXTENDED_SECURITY

import java.nio.file.Files;
import java.nio.file.Path;
import java.security.GeneralSecurityException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Locale;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.kerberos.KerberosKey;
import javax.security.auth.kerberos.KerberosPrincipal;

        this.session = session;
        this.cred = cred;

        sessionKey = session.transport.sessionKey;
        capabilities = session.transport.capabilities;

        if (session.transport.server.security == SECURITY_USER) {
            if (cred instanceof NtlmPasswordAuthentication) {
                NtlmPasswordAuthentication auth = (NtlmPasswordAuthentication)cred;

                if (auth == NtlmPasswordAuthentication.ANONYMOUS) {

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.security.GeneralSecurityException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.util;


import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.Provider;

import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

                return batchLimits[8];
        }
        return 0;
    }

    int writeParameterWordsWireFormat( byte[] dst, int dstIndex ) {

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

            if( session.transport.server.encryptedPasswords ) {

    static final int FLAGS2_LONG_FILENAMES = 0x0001;
    static final int FLAGS2_EXTENDED_ATTRIBUTES = 0x0002;
    static final int FLAGS2_SECURITY_SIGNATURES = 0x0004;
    static final int FLAGS2_SECURITY_REQUIRE_SIGNATURES = 0x0010;
    static final int FLAGS2_EXTENDED_SECURITY_NEGOTIATION = 0x0800;
    static final int FLAGS2_RESOLVE_PATHS_IN_DFS = 0x1000;
    static final int FLAGS2_PERMIT_READ_IF_EXECUTE_PERM = 0x2000;

import java.nio.charset.StandardCharsets;
import java.security.GeneralSecurityException;
import java.security.Key;
import java.security.MessageDigest;
import java.util.Arrays;
import java.util.Map;

import javax.crypto.Cipher;
import javax.crypto.Mac;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.kerberos.KerberosKey;


@SuppressWarnings ( "javadoc" )

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.GeneralSecurityException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import javax.security.auth.kerberos.KerberosKey;
import javax.security.auth.login.LoginException;

import org.bouncycastle.asn1.*;

import jcifs.pac.ASN1Util;

 */
package jcifs.internal.dtyp;


import jcifs.Decodable;
import jcifs.internal.util.SMBUtil;
import jcifs.smb.SID;
import jcifs.util.Hexdump;


/**
 * An Access Control Entry (ACE) is an element in a security descriptor
 * such as those associated with files and directories. The Windows OS
 * determines which users have the necessary permissions to access objects
 * based on these entries.
 * <p>