s.SetCounter(1) // set the counter to 1, skipping 32 bytes
	s.XORKeyStream(ciphertext, plaintext)

	p := poly1305.New(&polyKey)
	writeWithPadding(p, additionalData)
	writeWithPadding(p, ciphertext)
	writeUint64(p, len(additionalData))
	writeUint64(p, len(plaintext))
	p.Sum(tag[:0])

	return ret
}

func (c *chacha20poly1305) openGeneric(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
	tag := ciphertext[len(ciphertext)-16:]

	if err != nil {
		return
	}
	err = en.WriteUint64(z.ObjectsTotalCount)
	if err != nil {
		err = msgp.WrapError(err, "ObjectsTotalCount")
		return
	}
	// write "ObjectsTotalSize"
	err = en.Append(0xb0, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x73, 0x54, 0x6f, 0x74, 0x61, 0x6c, 0x53, 0x69, 0x7a, 0x65)
	if err != nil {
		return
	}
	err = en.WriteUint64(z.ObjectsTotalSize)
	if err != nil {

	err = en.Append(0x8a, 0xa3, 0x70, 0x74, 0x63)
	if err != nil {
		return
	}
	err = en.WriteUint64(z.PutTagTotal)
	if err != nil {
		err = msgp.WrapError(err, "PutTagTotal")
		return
	}
	// write "gtc"
	err = en.Append(0xa3, 0x67, 0x74, 0x63)
	if err != nil {
		return
	}
	err = en.WriteUint64(z.GetTagTotal)
	if err != nil {
		err = msgp.WrapError(err, "GetTagTotal")
		return
	}

	}
	err = en.WriteUint64(z.FailedCount)
	if err != nil {
		err = msgp.WrapError(err, "FailedCount")
		return
	}
	err = en.WriteUint64(z.PendingCount)
	if err != nil {
		err = msgp.WrapError(err, "PendingCount")
		return
	}
	err = en.WriteUint64(z.MissedThresholdSize)
	if err != nil {
		err = msgp.WrapError(err, "MissedThresholdSize")
		return
	}
	err = en.WriteUint64(z.AfterThresholdSize)

	err = en.Append(0x8b, 0xa3, 0x69, 0x66, 0x73)
	if err != nil {
		return
	}
	err = en.WriteUint64(z.InitFreeSpace)
	if err != nil {
		err = msgp.WrapError(err, "InitFreeSpace")
		return
	}
	// write "ic"
	err = en.Append(0xa2, 0x69, 0x63)
	if err != nil {
		return
	}
	err = en.WriteUint64(z.InitCapacity)
	if err != nil {
		err = msgp.WrapError(err, "InitCapacity")
		return
	}

		return
	}
	err = en.WriteUint64(z.Total)
	if err != nil {
		err = msgp.WrapError(err, "Total")
		return
	}
	err = en.WriteUint64(z.Free)
	if err != nil {
		err = msgp.WrapError(err, "Free")
		return
	}
	err = en.WriteUint64(z.Used)
	if err != nil {
		err = msgp.WrapError(err, "Used")
		return
	}
	err = en.WriteUint64(z.UsedInodes)
	if err != nil {

}

// EncodeMsg implements msgp.Encodable
func (z *message) EncodeMsg(en *msgp.Writer) (err error) {
	// array header, size 7
	err = en.Append(0x97)
	if err != nil {
		return
	}
	err = en.WriteUint64(z.MuxID)
	if err != nil {
		err = msgp.WrapError(err, "MuxID")
		return
	}
	err = en.WriteUint32(z.Seq)
	if err != nil {
		err = msgp.WrapError(err, "Seq")
		return
	}

	err = en.Append(0xa4, 0x53, 0x69, 0x7a, 0x65)
	if err != nil {
		return
	}
	err = en.WriteInt64(z.Size)
	if err != nil {
		err = msgp.WrapError(err, "Size")
		return
	}
	// write "MTime"
	err = en.Append(0xa5, 0x4d, 0x54, 0x69, 0x6d, 0x65)
	if err != nil {
		return
	}
	err = en.WriteInt64(z.ModTime)
	if err != nil {
		err = msgp.WrapError(err, "ModTime")
		return
	}

	err = en.Append(0x83, 0xa5, 0x54, 0x6f, 0x74, 0x61, 0x6c)
	if err != nil {
		return
	}
	err = en.WriteInt64(z.Total)
	if err != nil {
		err = msgp.WrapError(err, "Total")
		return
	}
	// write "Size"
	err = en.Append(0xa4, 0x53, 0x69, 0x7a, 0x65)
	if err != nil {
		return
	}
	err = en.WriteInt64(z.Size)
	if err != nil {
		err = msgp.WrapError(err, "Size")
		return
	}
	// write "N"

            SMBUtil.writeInt4(len, dst, inputLengthOffset);
            dstIndex += len;
        }
        else {
            SMBUtil.writeInt4(0, dst, inputOffsetOffset);
            SMBUtil.writeInt4(0, dst, inputLengthOffset);
        }

        if ( this.outputData != null ) {
            SMBUtil.writeInt4(dstIndex - getHeaderStart(), dst, outputOffsetOffset);