}
        } else {
            aces = null;
        }

        return bufferIndex - start;
    }
    public String toString() {
        String ret = "SecurityDescriptor:\n";
        if (aces != null) {
            for (int ai = 0; ai < aces.length; ai++) {
                ret += aces[ai].toString() + "\n";
            }
        } else {
            ret += "NULL";
        }
        return ret;
    }

        return val;
    }
    private int getDceReferent(Object obj) {
        Entry e;

        if (referents == null) {
            referents = new HashMap();
            referent = 1;
        }

        if ((e = (Entry)referents.get(obj)) == null) {
            e = new Entry();
            e.referent = referent++;
            e.obj = obj;
            referents.put(obj, e);
        }

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import jcifs.CIFSUnsupportedCryptoException;


/**
 * @author mbechler
 *
 */
public final class Crypto {

    private static Provider provider = null;


    /**
     * 
     */
    private Crypto () {}


    /**
     * 
     * @return MD4 digest
     */
    public static MessageDigest getMD4 () {
        try {

        int flags = 0;
        byte[] challenge = new byte[] {
            0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8
        };

        Type2Message t2 = new Type2Message(this.context, flags, challenge, null);
        Type2Message parsed = new Type2Message(t2.toByteArray());
        assertArrayEquals(challenge, parsed.getChallenge());
        assertNull(parsed.getTarget());
        assertNull(parsed.getTargetInformation());

                DEROctetString encOctets = ASN1Util.as(DEROctetString.class, ASN1Util.as(ASN1TaggedObject.class, encSequence, 2));
                byte[] crypt = encOctets.getOctets();

                if ( keys == null ) {
                    try {
                        keys = new KerberosCredentials().getKeys();
                    }
                    catch ( LoginException e ) {

    /**
     * 
     * @param pairs
     * @param type
     * @return whether the list contains a pair of that type
     */
    public static boolean contains ( List<AvPair> pairs, int type ) {
        if ( pairs == null ) {
            return false;
        }
        for ( AvPair p : pairs ) {
            if ( p.getType() == type ) {
                return true;
            }
        }
        return false;
    }

        super( msg );
        this.rootCause = rootCause;
    }

    public Throwable getRootCause() {
        return rootCause;
    }
    public String toString() {
        if( rootCause != null ) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter( sw );
            rootCause.printStackTrace( pw );
            return super.toString() + "\n" + sw;
        } else {

 */

    public SmbFileOutputStream( String url, int shareAccess ) throws SmbException, MalformedURLException, UnknownHostException {
        this( new SmbFile( url, "", null, shareAccess ), false );
    }

    SmbFileOutputStream( SmbFile file, boolean append, int openFlags ) throws SmbException, MalformedURLException, UnknownHostException {
        this.file = file;

        try {
            int usage = 17;
            if ( type == PacSignature.KERB_CHECKSUM_HMAC_MD5 ) {
                KerberosKey key = keys.get(PacSignature.ETYPE_ARCFOUR_HMAC);
                if ( key == null ) {
                    throw new PACDecodingException("Missing key");
                }
                return calculateMacArcfourHMACMD5(usage, key, data);
            }

package jcifs;


/**
 * Interface for opaque credential data
 * 
 * @author mbechler
 *
 */
public interface Credentials {

    /**
     * 
     * @param type
     * @return instance for type, null if the type cannot be unwrapped
     */
    <T extends Credentials> T unwrap ( Class<T> type );


    /**
     * @return the domain the user account is in
     */
    String getUserDomain ();


    /**