stringToSign += scope + "\n"
	canonicalRequestBytes := sha256.Sum256([]byte(canonicalRequest))
	stringToSign += hex.EncodeToString(canonicalRequestBytes[:])
	return stringToSign
}

// getSigningKey hmac seed to calculate final signature.
func getSigningKey(secretKey string, t time.Time, region string, stype serviceType) []byte {
	date := sumHMAC([]byte("AWS4"+secretKey), []byte(t.Format(yyyymmdd)))
	regionBytes := sumHMAC(date, []byte(region))

    }

    @Override
    public byte[] calculateMIC(final byte[] data) throws CIFSException {
        if (!this.completed) {
            throw new CIFSException("Context is not established");
        }
        return this.mechContext.calculateMIC(data);
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#verifyMIC(byte[], byte[])
     */
    @Override

    /**
     * Decodes a security descriptor from a byte buffer.
     *
     * @param buffer the byte buffer containing the security descriptor data
     * @param bufferIndex the starting offset in the buffer
     * @param len the length of data to decode
     * @return the number of bytes decoded
     * @throws IOException if an I/O error occurs during decoding
     */

		if err != nil {
			err = msgp.WrapError(err, "Tiers", za0001)
			return
		}
	}
	return
}

// UnmarshalMsg implements msgp.Unmarshaler
func (z *TierConfigMgr) UnmarshalMsg(bts []byte) (o []byte, err error) {
	var field []byte
	_ = field
	var zb0001 uint32
	zb0001, bts, err = msgp.ReadMapHeaderBytes(bts)
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	for zb0001 > 0 {
		zb0001--

    private byte oplockLevel;
    private byte openFlags;
    private int createAction;
    private long creationTime;
    private long lastAccessTime;
    private long lastWriteTime;
    private long changeTime;
    private long allocationSize;
    private long endOfFile;
    private int fileAttributes;
    private final byte[] fileId = new byte[16];
    private CreateContextResponse[] createContexts;

            final byte[] mechanismListMIC) {
        setResult(result);
        setMechanism(mechanism);
        setMechanismToken(mechanismToken);
        setMechanismListMIC(mechanismListMIC);
    }

    /**
     * Constructs a NegTokenTarg by parsing the provided token bytes
     * @param token the SPNEGO token bytes to parse
     * @throws IOException if parsing fails

                "Raw bytes for empty string should be empty");

        byte[] emptyBytes = new byte[0];
        AvTargetName avTargetNameFromBytes = new AvTargetName(emptyBytes);
        assertEquals(emptyString, avTargetNameFromBytes.getTargetName(),
                "Empty string should be handled correctly from raw bytes constructor");

        maxSetupCount = (byte) 0x00;
    }

    @Override
    int writeSetupWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

    @Override
    int writeParametersWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        writeInt2(fid, dst, dstIndex);
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00; // Reserved
        dstIndex++;

        maxDataCount = 0;
        maxSetupCount = (byte) 0x00;
        setupCount = 2;
    }

    @Override
    int writeSetupWireFormat(final byte[] dst, int dstIndex) {
        dst[dstIndex] = subCommand;
        dstIndex++;
        dst[dstIndex++] = (byte) 0x00;
        dst[dstIndex++] = (byte) 0x00; // no FID
        dst[dstIndex++] = (byte) 0x00;
        return 4;
    }

    @Override

   * @throws IllegalArgumentException if {@code bytes} has fewer than 8 elements
   */
  public static long fromByteArray(byte[] bytes) {
    checkArgument(bytes.length >= BYTES, "array too small: %s < %s", bytes.length, BYTES);
    return fromBytes(
        bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7]);
  }

  /**
   * Returns the {@code long} value whose byte representation is the given 8 bytes, in big-endian