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7. mtDWCLI

mtDWCLI is a program that provides random number and cryptographic functionality via a Command Line Interface (CLI). It offers features in 4 parts:

To make operations easier to understand I have employed a simple metaphor:

Random data is water.

This metaphor translates to computing activities as follows:

Quality HRNG = Hybrid Random Number Generator (PRNG XOR'd with entropy) which cannot be reversed, and is statistically random.
flavour XOR water => soda. soda XOR water => flavour. Flavour = User file.
input bottle filled with soda => output bottle. output bottle emptied => soda. bottle = PNG or FLAC file.

7.1 Commands

mtDWCLI reads instructions from the user via GNU Readline. This offers useful interactive facilities like using the up and down arrows to access previous commands.

It is also possible to run a script from the command line like these examples:

  cat script.txt | mtdwcli
  mtdwcli < script.txt
  mtdwcli < script.txt > log.txt 2>&1

Here is the complete list of commands that mtDWCLI accepts:

Command Arguments Notes
about About the program
butt add buckets <INTEGER> Add buckets to the current butt
butt add name <STRING> Create a new named butt
butt info Print info about the current butt
butt list List all of the butt names
butt set name <STRING> Change the current butt
help [ARG]... Display help on this command
q Quit the program
quit Quit the program
soda decode <INPUT FILENAME> <OUTPUT FILENAME> Decode a soda file
soda encode <INPUT FILENAME> <OUTPUT FILENAME> Create a soda file
soda file info <FILENAME> Print information about a soda file
soda info Print information about the current soda settings
soda multi decode <INPUT FILENAME> <OUTPUT FILENAME> Decode a nested soda file
soda multi encode <INPUT FILENAME> <OUTPUT FILENAME> <BUTT NAME>... Create a nested soda file
soda set mode <INTEGER> Set the soda mode. 0=Encrypt using the butt; 1=Don't encrypt, store as raw data
tap decode <INPUT FILENAME> <OUTPUT FILENAME> Decode a tap file to the original file stored inside the soda
tap encode <INPUT BOTTLE> <INPUT FILE> <OUTPUT BOTTLE> Create a tap file using a PNG/FLAC bottle and a soda input file
tap file info <FILENAME> Print information about this tap file
tap multi decode <INPUT FILENAME> <OUTPUT FILENAME> Decode a nested tap file (e.g. a PNG stored inside a FLAC)
well add path <PATH> Add the filenames inside this path to the well database
well empty Remove all filenames from the well database
well info Print information about the well
well save file <BYTES> <FILENAME> Create a file of random data using the well
well seed Re-seed the well PRNG using the current time
well seed int <INTEGER> Re-seed the well PRNG using this integer

7.2 Examples

7.2.1 Setting up a Well

The first time you use mtDWCLI you will need to set up the well in order to create high quality random data. This is done by passing some files to the well as a source of real world entropy as follows:

  well add path /some/directory/location/001
  well add path /some/directory/location/002
  well add path /some/directory/location/003

The current state of the well is found out as follows:

  well info

Once the well is set up you can use it to create arbitrary files of random data like this:

  well save file 11 /some/directory/location/004.bin
  well save file 127 /some/directory/location/005.bin
  well save file 128 /some/directory/location/006.bin
  well save file 129 /some/directory/location/007.bin
  well save file 1000000 /some/directory/location/010.bin

7.2.2 Managing Butt's

The first time you use mtDWCLI you will need to set up a butt to use as a one time pad. By default a random butt name is created for you, but it will be easier to remember if you create one using a code name such as:

  butt add name jane_54

You must then put some well data into the butt using the well as a source:

  butt add buckets 25

Each bucket is 16 megabytes.

You can create as many butt's as you like, such as:

  butt add name bertie_06
  butt add name george_15
  butt add name rosi_06

To switch to using a different butt for encryption, and to see its current state use these commands:

  butt set name jane_54
  butt info

7.2.3 Creating Soda

To encode a user file using encryption with data from the current butt you could do this:

  # encode and encrypt
  soda set mode 0
  
  soda encode input.txt output.soda

Sometimes you may not want to encrypt something. For example if you wanted to store some data in a PNG or FLAC file later using a tap, you may not want to encrypt. In this case to encode a soda file you would use:

  # encode but don't encrypt
  soda set mode 1
  
  soda encode input.txt output.soda

You can also encode multiple times using different butts as follows:

  soda multi encode input.txt output.soda george_15 jane_54 rosi_06 bertie_06

To decode a single or multiple soda file you would use:

  soda multi decode output.soda input.txt

7.2.4 Using a Tap

If you want to conceal a soda file inside a PNG or FLAC file you would do this:

  tap encode bottle.flac input.soda bottle.soda.flac

The output file is still a valid audio file and can be used as such. However it also contains the input.soda file which can be extracted by using:

  tap decode bottle.soda.flac input.txt

It is possible to nest FLAC and PNG files in a kind of Russian doll approach. To extract a message buried inside more than one level you could use:

  tap multi decode bottle.soda.flac input.txt

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