SmbResourceLocator loc = this.getParent().getLocator();
        String unc = loc.getUNCPath();
        String p = loc.getURL().getPath();
        if ( p.lastIndexOf('/') != ( p.length() - 1 ) ) {
            throw new SmbException(loc.getURL() + " directory must end with '/'");
        }
        if ( unc.lastIndexOf('\\') != ( unc.length() - 1 ) ) {
            throw new SmbException(unc + " UNC must end with '\\'");
        }

        bufferIndex += 4;
        int daclOffset = ServerMessageBlock.readInt4(buffer, bufferIndex);

        if (ownerUOffset > 0) {
            bufferIndex = start + ownerUOffset;
            owner_user = new SID(buffer, bufferIndex);
            bufferIndex += 28; // ???
        }

        if (ownerGOffset > 0) {
            bufferIndex = start + ownerGOffset;
            owner_group = new SID(buffer, bufferIndex);

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.pac.kerberos;


import java.io.ByteArrayInputStream;
import java.io.IOException;

        dstIndex += 4;
        if (command == SMB_COM_NT_TRANSACT_SECONDARY) {
            writeInt4( parameterDisplacement, dst, dstIndex );
            dstIndex += 4;
        }
        writeInt4( dataCount, dst, dstIndex );
        dstIndex += 4;
        writeInt4(( dataCount == 0 ? 0 : dataOffset ), dst, dstIndex );
        dstIndex += 4;
        if (command == SMB_COM_NT_TRANSACT_SECONDARY) {

        handle.sendrecv(rpc);
        if ( rpc.retval != 0 ) {
            throw new SmbException(rpc.retval, false);
        }
        this.opened = true;
    }


    @Override
    public synchronized void close () throws IOException {
        if ( this.opened ) {
            this.opened = false;

        align(4);
        int i = index;
        String val = null;
        int len = Encdec.dec_uint32le(buf, i);
        i += 12;
        if (len != 0) {
            len--;
            int size = len * 2;
            try {
                if (size < 0 || size > 0xFFFF) throw new NdrException( NdrException.INVALID_CONFORMANCE );
                val = new String(buf, i, size, "UTF-16LE");

 * the operation and the desired access bits are compared to the SID
 * and access mask of each ACE. If the SID matches, the allow/deny flags
 * and access mask are considered. If the ACE is a "deny"
 * ACE and <i>any</i> of the desired access bits match bits in the access
 * mask of the ACE, the whole access check fails. If the ACE is an "allow"
 * ACE and <i>all</i> of the bits in the desired access bits match bits in

            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);
            }

            if ( n <= 0 ) {
                break;
            }
            i += n;
        }

        return i;
    }


    static int readPacketType ( InputStream in, byte[] buffer, int bufferIndex ) throws IOException {
        int n;
        if ( ( n = readn(in, buffer, bufferIndex, HEADER_LENGTH) ) != HEADER_LENGTH ) {
            if ( n == -1 ) {
                return -1;

     */
    public static Provider getProvider() {
        if (provider != null) {
            return provider;
        }
        provider = new BouncyCastleProvider();
        return provider;
    }

    /**
     * Initialize Provider Instance with customProvider
     * @param customProvider
     * @throws Exception if Provider has already been initialized.
     */