Constructor Detail

• MacOutputStream

  public MacOutputStream​(javax.crypto.Mac mac)

  Base constructor - specify the MAC algorithm to use.

  Parameters:

  mac - the MAC implementation to use as the basis of the stream.

Method Detail

• write

  public void write​(int b)
             throws java.io.IOException

  Write a single byte to the stream.

  Specified by:

  write in class java.io.OutputStream

  Parameters:

  b - the byte value to write.

  Throws:

  java.io.IOException - in case of failure.

• write

  public void write​(byte[] bytes,
                    int off,
                    int len)
             throws java.io.IOException

  Write a block of data of length len starting at offset off in the byte array bytes to the stream.

  Overrides:

  write in class java.io.OutputStream

  Parameters:

  bytes - byte array holding the data.

  off - offset into bytes that the data starts at.

  len - the length of the data block to write.

  Throws:

  java.io.IOException - in case of failure.

• getMac

  public byte[] getMac()

  Execute doFinal() and return the calculated MAC.

  Returns:

  the MAC calculated from the output written to the stream.