this.fp = fh.getInitialSize();
                }
                init(th);
                if ( !append && this.smb2 ) {
                    // no open option for truncating, need to truncate the file
                    Smb2SetInfoRequest treq = new Smb2SetInfoRequest(th.getConfig(), fh.getFileId());
                    treq.setFileInformation(new FileEndOfFileInformation(0));

    // Open Function Encoding
    // create if the file does not exist
    static final int O_CREAT = 0x0010;
    // fail if the file exists
    static final int O_EXCL = 0x0020;
    // truncate if the file exists
    static final int O_TRUNC = 0x0040;

    /**
     * Get the current file length
     * 
     * @return file length
     * @throws SmbException
     */
    long length () throws SmbException;


    /**
     * Expand/truncate file length
     * 
     * @param newLength
     *            new file length
     * @throws SmbException
     */
    void setLength ( long newLength ) throws SmbException;

            // truncate the file
            if(( flags & SmbFile.O_CREAT ) == SmbFile.O_CREAT ) {
                // create it if necessary
                createDisposition = FILE_OVERWRITE_IF;
            } else {
                createDisposition = FILE_OVERWRITE;
            }
        } else {
            // don't truncate the file

            // truncate the file
            if(( flags & SmbFile.O_CREAT ) == SmbFile.O_CREAT ) {
                // create it if necessary
                openFunction = OPEN_FN_TRUNC | OPEN_FN_CREATE;
            } else {
                openFunction = OPEN_FN_TRUNC;
            }
        } else {
            // don't truncate the file

        byte[] trunc = new byte[8];
        System.arraycopy(dgst, 0, trunc, 0, 8);

        if ( log.isDebugEnabled() ) {
            log.debug("Digest " + Hexdump.toHexString(dgst));
            log.debug("Truncated " + Hexdump.toHexString(trunc));
        }

        if ( ( this.ntlmsspFlags & NtlmFlags.NTLMSSP_NEGOTIATE_KEY_EXCH ) != 0 ) {
            try {
                trunc = this.sealClientHandle.doFinal(trunc);

            try {
                try ( OutputStream os = f.openOutputStream() ) {
                    writeRandom(4096, 3072, os);
                }

                // this should truncate
                try ( OutputStream os = f.openOutputStream() ) {
                    writeRandom(4096, 1024, os);
                }

                try ( InputStream is = f.getInputStream() ) {

import java.security.MessageDigest;

/**
 * This is an implementation of the HMACT64 keyed hashing algorithm.
 * HMACT64 is defined by Luke Leighton as a modified HMAC-MD5 (RFC 2104)
 * in which the key is truncated at 64 bytes (rather than being hashed
 * via MD5).
 */ 
public class HMACT64 extends MessageDigest implements Cloneable {

    private static final int BLOCK_LENGTH = 64;

import java.security.MessageDigest;


/**
 * This is an implementation of the HMACT64 keyed hashing algorithm.
 * HMACT64 is defined by Luke Leighton as a modified HMAC-MD5 (RFC 2104)
 * in which the key is truncated at 64 bytes (rather than being hashed
 * via MD5).
 */
class HMACT64 extends MessageDigest implements Cloneable {

    private static final int BLOCK_LENGTH = 64;

    private static final byte IPAD = (byte) 0x36;

    /**
     * Opens an output stream writing to the file (write only, exclusive write access)
     * 
     * @param append
     *            whether to append to or truncate the input
     * @param openFlags
     *            flags for open operation
     * @param access
     *            desired file access flags
     * @param sharing