import jcifs.internal.SMBSigningDigest;
import jcifs.internal.util.SMBUtil;


/**
 * @author mbechler
 *
 */
public class Smb2SigningDigest implements SMBSigningDigest {

    private static final Logger log = LoggerFactory.getLogger(Smb2SigningDigest.class);

    /**
     * 
     */
    private static final int SIGNATURE_OFFSET = 48;
    private static final int SIGNATURE_LENGTH = 16;

     */
    @Override
    public Smb2SigningDigest getDigest () {
        return this.digest;
    }


    /**
     * 
     * {@inheritDoc}
     *
     * @see jcifs.internal.CommonServerMessageBlock#setDigest(jcifs.internal.SMBSigningDigest)
     */
    @Override
    public void setDigest ( SMBSigningDigest digest ) {
        this.digest = (Smb2SigningDigest) digest;
        if ( this.next != null ) {

        // with SMB3's negotiation validation it's no longer possible to ignore this (on the validation response)
        // make sure that validation is performed in any case
        Smb2SigningDigest dgst = getDigest();
        if ( dgst != null && !isAsync() && ( getConfig().isRequireSecureNegotiate() || getErrorCode() == NtStatus.NT_STATUS_OK ) ) {
            // TODO: SMB2 - do we need to check the MIDs?

                            log.debug("Final preauth integrity hash " + Hexdump.toHexString(this.preauthIntegrityHash));
                        }
                        Smb2SigningDigest dgst = new Smb2SigningDigest(this.sessionKey, negoResp.getDialectRevision(), this.preauthIntegrityHash);
                        // verify the server signature here, this is not done automatically as we don't set the