private static void verifyAESMAC ( int usage, String expect, String data, String key ) throws GeneralSecurityException {
        verifyAESHMAC(usage, expect, key, Hex.decode(data));
    }


    private static void verifyArcfourHMAC ( int usage, String expect, String data, String key ) throws GeneralSecurityException {
        verifyArcfourHMAC(usage, expect, key, Hex.decode(data));
    }


    /**
     * @param expect

    public static byte[] decrypt ( byte[] data, Key key, int type ) throws GeneralSecurityException {
        Cipher cipher = null;
        byte[] decrypt = null;

        switch ( type ) {
        case KerberosConstants.DES_ENC_TYPE:
            decrypt = decryptDES(data, key, cipher);
            break;
        case KerberosConstants.RC4_ENC_TYPE:
            decrypt = decryptRC4(data, key);
            break;
        default:

        }
        return dk;
    }


    public static byte[] expandNFold ( byte[] data, int outlen ) {
        int lcm = lcm(outlen, data.length);
        byte[] buf = new byte[outlen];
        int carry = 0;
        for ( int i = lcm - 1; i >= 0; i-- ) {
            carry = carry_add(data, buf, carry, i);
        }

        if ( carry != 0 ) {
            for ( int i = outlen - 1; i >= 0; i-- ) {

        bufferIndex += 4;
        this.messageLength = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.data = new byte[len - 16];
        if ( this.data.length > 0 ) {
            System.arraycopy(buffer, bufferIndex, this.data, 0, this.data.length);
        }
        return bufferIndex - start;
    }

     * 
     * @param data
     * @return individual pairs
     * @throws CIFSException
     */
    public static List<AvPair> decode ( byte[] data ) throws CIFSException {
        List<AvPair> pairs = new LinkedList<>();
        int pos = 0;
        boolean foundEnd = false;
        while ( pos + 4 <= data.length ) {
            int avId = SMBUtil.readInt2(data, pos);

 * of <tt>0x001200A9</tt> which doesn't have the
 * <tt>FILE_WRITE_DATA</tt> bit on (bit <tt>0x00000002</tt>). Actually, this isn't quite correct. If
 * <tt>WNET\alice</tt> is in the local <tt>Administrators</tt> group the access check
 * will succeed because the inherited ACE allows local <tt>Administrators</tt>
 * both <tt>FILE_READ_DATA</tt> and <tt>FILE_WRITE_DATA</tt> access.
 * 
 * @internal
 */

    static final int ATTR_NORMAL = 0x080;
    static final int ATTR_TEMPORARY = 0x100;

    // access mask encoding
    static final int FILE_READ_DATA = 0x00000001; // 1
    static final int FILE_WRITE_DATA = 0x00000002; // 2
    static final int FILE_APPEND_DATA = 0x00000004; // 3
    static final int FILE_READ_EA = 0x00000008; // 4
    static final int FILE_WRITE_EA = 0x00000010; // 5

 * 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;


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

    /**
     * 
     * @param type
     * @return instance for type, null if the type cannot be unwrapped
     */

            file.send( new TransWaitNamedPipe( "\\pipe" + file.unc ),
                                        new TransWaitNamedPipeResponse() );
        }
        file.open( openFlags, access | SmbConstants.FILE_WRITE_DATA, SmbFile.ATTR_NORMAL, 0 );
        this.openFlags &= ~(SmbFile.O_CREAT | SmbFile.O_TRUNC); /* in case close and reopen */
        writeSize = file.tree.session.transport.snd_buf_size - 70;

        "Cannot create a file when that file already exists.",
        "All pipe instances are busy.",
        "The pipe is being closed.",
        "No process is on the other end of the pipe.",
        "More data is available.",
        "This user account has expired.",
        "The user is not allowed to log on from this workstation.",
        "The user is not allowed to log on at this time.",