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https://github.com/stef/websphinx-chrom

Chrom* Addon for Sphinx-based Password Storage
https://github.com/stef/websphinx-chrom

addon chrome-extension chromium-extension opera-extension password-manager password-storage webextension

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Chrom* Addon for Sphinx-based Password Storage

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README 

        
# WebSphinx chrome/opera addon



SPHINX: a password **S**tore that **P**erfectly **H**ides from **I**tself

(**N**o **X**aggeration)



SPHINX is a cryptographic password storage as described in

https://eprint.iacr.org/2015/1099



And as presented by the Levchin Prize winner 2018 Hugo Krawczyk on

Real World Crypto https://www.youtube.com/watch?v=px8hiyf81iM



## What is this thing?



It allows you to have only a few (at least one) passwords that you

need to remember, while at the same time provides unique 40 (ASCII)

character long very random passwords (256 bit entropy). Your master

password is encrypted (blinded) and sent to the password storage

server which (without decrypting) combines your encrypted password

with a big random number and sends this (still encrypted) back to you,

where you can decrypt it (it's a kind of end-to-end encryption of

passwords) and use the resulting unique, strong and very random

password to register/login to various services. The resulting strong

passwords make offline password cracking attempts infeasible. If say

you use this with google and their password database is leaked your

password will still be safe.



How is this different from my password storage which stores the

passwords in an encrypted database? Most importantly using an

encrypted database is not "end-to-end" encrypted. Your master password

is used to decrypt the database read out the password and send it back

to you. This means whoever has your database can try to crack your

master password on it, or can capture your master password while you

type or send it over the network. Then all your passwords are

compromised. If some attacker compromises your traditional password

store it's mostly game over for you. Using sphinx the attacker

controlling your password store learns nothing about your master nor

your individual passwords. Also even if your strong password leaks,

it's unique and cannot be used to login to other sites or services.



## Usage



WebSphinx tries to automatically figure out what you want to do: login, create

a new account or change a password. It tries to figure this out by counting the

number of password input fields that are seen on the page. If this fails then

you can manually insert the password by clicking on the field where you want

the password inserted and on the WebSphinx popup click on **Insert Password**.



If there is a text input field with a username already filled in, then it will

try to find a password for that user to login or change, or create a password

for this user if there is no such user yet associated with the current site by

the password storage. If there is no user to be found in a text field, then you

can enter the user in the WebSphinx popup, or you can select it from a list of

users that the password storage knows about.



## Installation



Websphinx consists of two parts, the frontend which is the addon. And the backend which handles everything.



WebSphinx is not in the Chrome Web Store, if you want to install the addon

follow these steps (this applies to all Operating Systems):



 1. Create a directory on your filesystem containing the files in the

    websphinx directory. On windows if you used the winsphinx MSI

    installer this directory can be found under `c:\Program Files\Sphinx 1.0\websphinx`.

 2. Start your browser if it is not running,

 3. open [chrome://extension](chrome://extension) in your browser,

 4. enable `Developer Mode`,

 5. `Load Unpacked Extension` and provide the directory created in step 1.,

 6. If all went well, you should get a yellowyish sphinx button.



The WebSphinx addon requires the installation of a native messaging host - which is terminology and it really means backend.



### Windows



If you are on Windows you need [winsphinx](https://github.com/stef/winsphinx), which should take care of everything.



### Linux

If you are on Linux you need to install some dependencies:



#### libsphinx



1. git clone https://github.com/stef/libsphinx

2. cd libsphinx/src

3. sudo apt install install python3 libsodium libsodium-dev

3. sudo PREFIX=/usr make install



#### pwdsphinx



you also need to install [pwdsphinx](https://github.com/stef/pwdsphinx), which can be done simply by:



1. sudo pip3 install pwdsphinx

2. you'll also need to install a graphical pinentry,

   - either sudo apt-get install pinentry-qt

   - or sudo apt-get install pinentry-gtk2

   - or sudo apt-get install pinentry-gnome3

   - or sudo apt-get install pinentry-fltk



(or anything equivalent to apt-get install on your OS)



And set the pinentry variant if it is not invoked with

`/usr/bin/pinentry` in your sphinx config file in the `websphinx`

section



Your sphinx config file can be in a couple of locations:

 - globally: `/etc/sphinx/config`

 - for your user: `~/.sphinxrc`

 - or also:`~/.config/sphinx/config`

 - and always in the current directory.



To set the pinentry path, add or modify to have a section like this:



```

[websphinx]

pinentry=/usr/bin/pinentry-gtk-2

```



#### Native Messaging Host Manifest



Copy [*websphinx.json*](https://github.com/stef/websphinx-firefox/raw/master/websphinx.json), depending on your browser to finish the installation:



- Linux/BSD

  - Per-user: `~/.config/{google-chrome,chromium}/NativeMessagingHosts/websphinx.json`

  - System: `/etc/{opt/chrome,chromium}/native-messaging-hosts/websphinx.json`



You need to change *%PATH%* in *websphinx.json* so it refers to *websphinx.py* which came with pwdsphinx.



Assuming you have chromium follow these steps (otherwise replace chromium with google-chrome, or even possibly opera?)



1. `mkdir -p ~/.config/chromium/NativeMessagingHosts`

2. `curl -Lo ~/.config/chromium/NativeMessagingHosts/websphinx.json https://github.com/stef/websphinx-chrom/raw/master/websphinx.json`



if you followed this guide, `websphinx` should be installed in `/usr/bin` and you should replace the `%PATH%` in `~/.config/chromium/NativeMessagingHosts/websphinx.json` to `/usr/bin` so the file looks like this:



```

{

  "name": "websphinx",

  "description": "Host for communicating with Sphinx",

  "path": "/usr/bin/websphinx",

  "type": "stdio",

  "allowed_origins": [

    "chrome-extension://ojbhlhidchjkmjmpeonendekpoacahni/"

  ]

}



```



### Final step



Restart your browser in which the addon is installed and enjoy.



### MacOS



Try to translate the steps from Linux to your system, and possibly provide a PR so it can be added here.



#### Native Messaging Host Manifest



Copy [*websphinx.json*](https://github.com/stef/websphinx-firefox/raw/master/websphinx.json) to either:



  - Per-user: `~/Library/Application Support/{Google/Chrome,Chromium}/NativeMessagingHosts/websphinx.json`

  - System-wide: `/Library/{Google/Chrome,Chromium}/NativeMessagingHosts/websphinx.json`



You need to change *%PATH%* in *websphinx.json* so it refers to *websphinx.py* which came with pwdsphinx.



## Credits



Icon made by Freepik from www.flaticon.com