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90 lines
4.6 KiB
Markdown
90 lines
4.6 KiB
Markdown
# Diceware
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<img src="./dice.jpg" width="250" align="right" />
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Current build/test status in Travis CI: [](https://travis-ci.org/dmuth/diceware)
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First, feel free to check out the live demo, running at [https://diceware.dmuth.org/](https://diceware.dmuth.org/)
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Weak passwords are a big flaw in computer security due to a lack of "entropy" or randomness. For example, how many times have you used the name of a pet or relative or street in a password, or perhaps the number "1". Not very random, is it? :-) Worse still, if passwords are reused between services, that increases your security risk.
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Fact is, humans are terrible at remembering random combiations of letters and numbers, but we are great at remembering phrases of words. That's where Diceware comes in.
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Diceware is based on the proposal at [http://world.std.com/~reinhold/diceware.html](http://world.std.com/~reinhold/diceware.html) wherein virtual dice are roled 5 times, and the 5 digit number used against a lookup table of words. 4 dice rolls gives you 4 random words which are easy for a human being to remember, yet have a high amount of entropy which makes them hard to crack.
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For more information on Diceware:
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- [The Diceware Passphrase FAQ](http://world.std.com/~reinhold/diceware.html)
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- [Diceware word list](http://world.std.com/~reinhold/diceware.wordlist.asc)
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- [Diceware for Passphrase Generation and Other Cryptographic Applications](http://world.std.com/~reinhold/diceware.txt)
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# Can I run this on my own computer without using your website?
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Yes. Feel free to clone this repo with `git clone https://github.com/dmuth/diceware.git` and run it
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from a local directory on your computer.
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You can also set up a webserver on Mac/Linux boxes by running `python3 -m http.server 8000`.
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You will then able to access DiceWare at http://localhost:8000/.
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# Will this work on an iPhone?
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Yep! It should work on any mobile phone or tablet that supports Javascript, but I have only
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tested it on an iPhone 5S at this time.
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# Will this work in an air-gapped environment?
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Yes, copies of assets such as Bootstrap and jQuery have been made, and Diceware can now be run without
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requiring an Internet connection.
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# Development
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This app is built with <a href="https://webpack.js.org/">Webpack</a>.
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When done editing `main.js`, the packed file can be built by simply running `webpack`
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on the command line. It will be writing to `dist/bundle.js`. To run webpack in a
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mode so that it regularly checks for changed files, run `webpack --watch --mode development`.
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In a move that departs from Best Practices, I have made the decision to include
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the packed file in Git. My reason for this is that the software will be ready
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to run as soon as it is checked out (or a ZIP is downloaded), and that is a key
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design feature of this app--I want it to be as easy to get up and running as possible.
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A local webserver can be set up by running `npm install http-server -g` to install it, then `http-server` to listen on http://localhost:8080/
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## In summary:
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- `npp run clean` - Cleanup after a previous run
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- `npm install` - Install NPM packages used by Diceware
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- `npm run dev-build` - Run webpack to pack Javascript files and watch for changes.
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- `http-server`
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- `vim src/lib.js src/index.js`
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- `rm -fv src/index.js && git co src/index.js` - Get the new SHA1 hash that will be displayed in debug messages.
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- The hash can be crosschecked with the results of `git hash-object src/index.js`
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- `npm test` - Make sure you didn't break any of the core logic!
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- `npm run build` - Webpack Javscript files in production mode (smaller file but takes longer)
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- `./go-sync-to-s3.sh` - Do this if you're me, to upload to S3. If you're not me, you'll need to do something else, or possibly nothing at all.
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## In practice:
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- `npm run clean; npm run dev-build` - Run webpack in dev mode while working on Javascript
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- `http-server` - Stand up a local HTTP server
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- `vim src/lib.js src/index.js`
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- `rm -fv src/index.js && git co src/index.js`
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- `npm run clean; npm run build` - Run webpack in prod mode to produce final Javascript bundle
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- `./go-sync-to-s3.sh` - Do this if you're me, to upload to S3. If you're not me, you'll need to do something else, or possibly nothing at all.
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# Who built this? / Contact
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My name is Douglas Muth, and I am a software engineer in Philadelphia, PA.
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There are several ways to get in touch with me:
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- Email to doug.muth AT gmail DOT com or dmuth AT dmuth DOT org
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- [Facebook](https://facebook.com/dmuth) and [Twitter](http://twitter.com/dmuth)
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- [LinkedIn](https://linkedin.com/in/dmuth)
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Feel free to reach out to me if you have any comments, suggestions, or bug reports.
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