update(data, index, length - SmbConstants.SIGNATURE_OFFSET - 8);
            update(raxr.getData(), raxr.getOffset(), raxr.getDataLength());
        }
        else {
            update(data, index, msg.getLength() - SmbConstants.SIGNATURE_OFFSET - 8);
        }
        byte[] signature = digest();
        for ( int i = 0; i < 8; i++ ) {
            if ( signature[ i ] != data[ offset + SmbConstants.SIGNATURE_OFFSET + i ] ) {

    <example>
      ${fe:facetForm()}
    </example>
  </function>

  <function>
    <description>
      Returns a hidden form for More Like This.
    </description>
    <name>mltForm</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String mltForm()</function-signature>
    <example>

     */
    void sign ( byte[] data, int offset, int length, CommonServerMessageBlock request, CommonServerMessageBlock response );


    /**
     * Performs MAC signature verification. This calculates the signature
     * of the SMB and compares it to the signature field on the SMB itself.
     *
     * @param data
     *            The data.
     * @param offset
     *            The starting offset at which the SMB header begins.

                break;
            }
            bufferStream.readFully(this.checksum);
        }
        catch ( IOException e ) {
            throw new PACDecodingException("Malformed PAC signature", e);
        }
    }


    public int getType () {
        return this.type;
    }


    public byte[] getChecksum () {
        return this.checksum;
    }

            update(raxr.b, raxr.off, raxr.dataLength);
        } else {
            update(data, index, response.length - ServerMessageBlock.SIGNATURE_OFFSET - 8);
        }
        byte[] signature = digest();
        for (int i = 0; i < 8; i++) {
            if (signature[i] != data[offset + ServerMessageBlock.SIGNATURE_OFFSET + i]) {
                if( log.level >= 2 ) {

            System.arraycopy(buffer, 4, payload, 0, len);
            setRawPayload(payload);
        }

        if ( !verifySignature(buffer, 4, len) ) {
            throw new SMBProtocolDecodingException("Signature verification failed for " + this.getClass().getName());
        }
        return len;
    }


    protected int writeAndXWireFormat ( byte[] dst, int dstIndex ) {
        int start = dstIndex;

     */
    @Override
    public boolean verifySignature ( byte[] buffer, int i, int size ) {
        // observed too that signatures on error responses are sometimes wrong??
        // Looks like the failure case also is just reflecting back the signature we sent

        // with SMB3's negotiation validation it's no longer possible to ignore this (on the validation response)

        }

        byte[] sig = new byte[SIGNATURE_LENGTH];
        System.arraycopy(data, offset + SIGNATURE_OFFSET, sig, 0, SIGNATURE_LENGTH);

        int index = offset + SIGNATURE_OFFSET;
        for ( int i = 0; i < SIGNATURE_LENGTH; i++ )
            data[ index + i ] = 0;

        this.digest.update(data, offset, length);

        byte[] cmp = new byte[SIGNATURE_LENGTH];

                case PacConstants.SERVER_CHECKSUM:
                    // PAC Server Signature
                    if ( this.serverSignature == null ) {
                        this.serverSignature = new PacSignature(bufferData);
                        if ( log.isDebugEnabled() ) {
                            log.debug(
                                String.format("Server signature is type %d @ %d len %d", this.serverSignature.getType(), bufferOffset, bufferSize));

            size += 8;
        }

        byte[] type2 = new byte[size];
        int pos = 0;

        System.arraycopy(NTLMSSP_SIGNATURE, 0, type2, pos, NTLMSSP_SIGNATURE.length);
        pos += NTLMSSP_SIGNATURE.length;

        writeULong(type2, pos, NTLMSSP_TYPE2);
        pos += 4;

        // TargetNameFields