129 lines
3.8 KiB
Markdown
129 lines
3.8 KiB
Markdown
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# Filou
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> cryptogra<b>phy</b> (without) <b>loo</b>phole
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Filou is in devlopment. It is not yet a super hyper cool program but
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we are going there.
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[](https://travis-ci.org/didiercrunch/filou/)
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## the name
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*Filou* is my brother, Charles Philippe Amyot, child nickname. He died the 9th
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octobre 2014. This program is dedicated to his memory.
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## Use case
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Filou is the *npm* for cryptography. It revolutionizes the way the people
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use cryptography on a everyday use. The general design is to do what programs
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like *npm* did for dependencies management but for cryptography.
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Filou user interface is a command line user interface (*CLI*) and its source
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code. For us, the readability of the source code is as important as the
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functionality of the software.
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### using filou
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#### creating keys
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The first thing you want to do when using filou is to create your personal
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private-public key pair. your keys will be kept in
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your `~/.filou` directory.
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~~~
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filou createkey
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~~~
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Then, you might want to publish your public key to the public repository
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~~~
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filou publish -email alice@lechef.com
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~~~
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#### encrypting file
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To encrypt a file to send to *bob@lechef.com*, you can do the following
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things
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1. if *bob@lechef.com*'s public key is on the public repository, you can
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simply use
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~~~
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filou encrypt -to bob@lechef.com -file mysecretdocument.doc -out mycypherdoc.cyp
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~~~
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2. if *bob@lechef.com*'s public key is on your local file path you can use
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~~~
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filou encrypt -to /path/to/bob@lechef.com -file mysecretdocument.doc -out mycypherdoc.cyp
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~~~
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3. if *bob@lechef.com*'s public key is on accessible on a public url you can
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use
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~~~
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filou encrypt -to https://example.com/path/to/bob@lechef.com -file mysecretdocument.doc -out mycypherdoc.cyp
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~~~
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In anycase, the command line output will be a cypher file called
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mycypherdoc.cyp. You are then responsible to send the file to its recipient
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by the mean you wish; email, dropbox, floppy disc...
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#### decrypting file
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Once you received a file `encrypted_file.cyp`, you can decrypt it via the
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following command.
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~~~
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filou decrypt encrypted_file.cyp
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~~~
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#### so you want to hack filou
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That's cool because it is made for that! That you are a high school student
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with basic programming knownledge, a math student that wants to see an
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implementation of cryptographic algorithm or a senior security engineer, we
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welcome you!
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Before everything, you will need to learn a little bit of [Go](http://golang.org).
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We really like the official [go tour](http://tour.golang.org/) because you
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do not need to download or install anything; everything runs in your web
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browser. Then, you only need to dig into the code!
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We are proud of our source code. The unit test code coverage is almost
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100%. All the functions are bellow 10 line of code. So if you do not
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understand a small piece of code, just look at its unit tests.
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All our file formats are well documented [yaml](http://www.yaml.org/) files.
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You can open any file and read the comments and make sure everything
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make sense.
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---
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## first road map
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* make a simple web service to use as remote key location
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* make blue print for the file
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---
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## things to do not forget
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In the long run, there are some things we will want to do and we need not
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to forget about it or lock ourselves out of those goals.
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* Use many encryption algorithms (symetrics, asymetrics, modes and hashes)
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* Has many keys for the same email
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* Rotate its keys
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* Encrypt a file to many people at the same time
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* Keys could be some where else like in [npm](https://www.npmjs.org/doc/cli/npm-install.html)
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* Using threshold cryptography
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* make a neet web site like npm.org to store keys
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* make alias for known public keys
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* make it easy for rapper applications
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---
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