EncryptAGit - Encrypt Your Git Repos

Overview

Downloads

EncryptAGit

Encrypt Your Git Repos

Authors

Installation

pip install encryptAgit

Upgrade

pip install encryptAgit --upgrade

Requirements

  • GitPython
  • pathlib
  • cryptography
  • pathspec

Why??

OK. I'm already paying for github. It stores files. And has versioning.

I wanted to see how hard it would be to write something from scratch with reasonable security...

..That I wouldn't mind using.

I'm using encryptAgit as a note taking app. I can use whatever editor I want. Sublime Text, vim, emacs, VS Code. Whatever that writes files to disk.

You could use encryptAgit to keep your notes/code private, but yet public, and share the key with only people you want to have access.

Feel free to share how you are using it!

Threat model

My threat model does not include Mossad.

If someone is on your computer capturing keystrokes, this won't help you.

If someone comes across your gitrepo of encrypted notes and they want to decrypt it, it's not going to be easy (depends on your password/salt combos - read more...).

Security

I'm using fernet.

As this is a store of secrets, I can't use a random salt. The user provides it.

To produce the encryption/decryption key, I'm using Scrypt with the user provided salt to make the Key Derivation Function and then the user password is provided to derive the key.

It takes over 1 sec to compute the key on a late model macBook pro (not an M1).


random.seed(user_salt)
# The salt must be consistent and it is secret.
# Not md5!
self.salt = random.randbytes(16)

kdf = Scrypt(
    salt=self.salt,
    length=32,
    n=2**15,
    r=13,
    p=3,
)

start = time.time()
self.key = base64.urlsafe_b64encode(kdf.derive(bytes(password, 'iso-8859-1')))
end = time.time()

I consider the salt and password to be secrets. Maybe share one of each between friends so only the two of you can open a git repo. I don't know. Either way, keep them secure.

Encrypted files (tokens - fernet speak) are stored in encrypted_git.json.

encrypted_git.json format:

{
    {
  "full_file_path": {
    "token": "gAAAAAABidd63NQSVrcIRrq9f_g68o4KV13w3SiSXSPI5fxOJNnhlyUUU0eTnzlzkBf_mdRsvZeeh8Sq8YO7yV2GaqB56qNai7t_kkbgJ34OiDLl_N-bXviELx5MSyblp-EbKciUsYH67qIpbnTsbw9KZcQg5uzp9RIlWT9aYaEOruJbEjLSM7_KoWWLKtajFaZ87t9ZY_3nJ7AdSdvOx645Th9VXWxrxV3PQtXaLUYCUYIpfKV3w_9uHCRoA=",
    "filehash": "ee7d78b32d112e88d69fa0739e3217c0d44b193ccbb7579909e1b72e7839f7b5922b5ca80d5f88b3e60aa67dd1ee379b8f74f9dc824b2c6c509471a11d406789"
  },

}

filehash is the sha512 of the user provided salt + the file contents.


    def hash_file(self, file_path):
        return hashlib.sha512(self.salt + open(file_path, 'rb').read()).hexdigest()

This helps to prevent searching for a file by hash.

No keying material is logged or written to disk.

Yes, you can see the repo_path + file name in the encrypted_git.json file. Make sure it is not sensitive info. Reason this is not encrypted is it allows for speed and minimizes decryption cycles to check if a file has been modified. One might say, you could encrypt the full_file_path, like so...

{
    1: {"fullPath": "CBAAAAABidd63NQSVrcIRrdsas63635181faske82",
    "token": "gAAAAAABidd63NQSVrcIRrq9f_g68o4KV13w3SiSXSPI5fxOJNnhlyUUU0eTnzlzkBf_mdRsvZeeh8Sq8YO7yV2GaqB56qNai7t_kkbgJ34OiDLl_N-bXviELx5MSyblp-EbKciUsYH67qIpbnTsbw9KZcQg5uzp9RIlWT9aYaEOruJbEjLSM7_KoWWLKtajFaZ87t9ZY_3nJ7AdSdvOx645Th9VXWxrxV3PQtXaLUYCUYIpfKV3w_9uHCRoA=",
    "filehash": "ee7d78b32d112e88d69fa0739e3217c0d44b193ccbb7579909e1b72e7839f7b5922b5ca80d5f88b3e60aa67dd1ee379b8f74f9dc824b2c6c509471a11d406789"
    },

}

Whereas, the fullPath is kept decrypted in a python dict pointing to the current filehash. However, the fullPath will allways be different when encrypted and great care will be required to ensure I'm not writing to the encrypted_git.json file multiple times for the same file. To properly find the file to change/update/remove, I'd have to decrypt each fullPath to ensure I had an exact match - then update or drop the file from the json blob.

Hmm... I'll pass for now.

Keep your filenames non-sensitive!

And use a passphrase for your salt and passwords.

Isn't this like chef data-bags?

Not really. Fernet is AES-CBC. It's authenticated. The difference is I'm using Scrypt to derive a password vs pkcs5_keyivgen, which is depreciated and is not using a salt. I'm requiring it.

Usage

This works best in a fresh git repo. I haven't implemented git history squashing yet. So any old files will be in your git history.

Maybe I'll implement git history squashing/deletion in a new release.

  1. git clone your notes repo
  2. Change directory to it.
  3. Execute encryptAgit.py
encryptAGit
๐Ÿ˜„ No encrypted_git.json file, seems like first use!
๐Ÿค— Welcome to encryptAGit! Let's encrypt your repo!
๐Ÿค“ Use a passphrase for both salt and password. Remember what you enter!
๐Ÿง‚Enter your salt:
๐Ÿ•ต๏ธ Enter your password:
[*] It took 1.185420036315918 seconds to make the key.
[*] Updating moo.txt in encrypted store
[*] Updating hello.txt in encrypted store
[*] Updating pictures/kailua_beach.png in encrypted store
[*] Updating pictures/washington_monument.png in encrypted store
[*] Updating notes/unencryped.txt in encrypted store
[*] Updating notes/testing.txt in encrypted store
[*] Updating notes/1/more.txt in encrypted store
[*] Writing updated encrypted_git.json
[*] Push of encrypted_git.json complete!

Now any SAVED changes to files in your git repo will be automatically encrypted and pushed to your git repo.

Here I saved a file in a new directory called newdir called newfile.txt:

[*] Updating newdir/newfile.txt in encrypted store
[*] Writing updated encrypted_git.json
[*] Push of encrypted_git.json complete!

Use .gitignore:

 cat .gitignore 
*.swp
.DS_Store
README.md

Any files you put in .gitignore will not be encrypted, deleted, or saved. You have to git add, commit, and push those yourself.

Ending the process and changing password

Hit CTRL+C and you will be asked if you want to rotate your salt/password.

Type n if you don't, y if you do.

encryptAgit
๐Ÿ˜Š Welcome Back to encryptAGit! Let's decrypt your repo!
๐Ÿง‚Enter your salt:
๐Ÿ•ต๏ธ Enter your password:
[*] It took 1.0983080863952637 seconds to make the key.
[*] Writing decrypted moo.txt to disk.
[*] Writing decrypted hello.txt to disk.
[*] Writing decrypted pictures/kailua_beach.png to disk.
[*] Writing decrypted pictures/washington_monument.png to disk.
[*] Writing decrypted newdir/newfile.txt to disk.
[*] Writing decrypted notes/unencryped.txt to disk.
[*] Writing decrypted notes/testing.txt to disk.
[*] Writing decrypted notes/1/more.txt to disk.
^C
๐Ÿ’ญ Do you want to change your salt and password? (y/n):

If you want to backout completely without erasing your UNENCRYPTED files type CTRL+C twice in a row.

sys.exit(main()) File "/Users/pioneer/homebrew/lib/python3.9/site-packages/encryptAgit.py", line 361, in main run.run() File "/Users/pioneer/homebrew/lib/python3.9/site-packages/encryptAgit.py", line 346, in run answer = input('\n๐Ÿ’ญ Do you want to change your salt and password? (y/n):') KeyboardInterrupt ">
encryptAgit
๐Ÿ˜Š Welcome Back to encryptAGit! Let's decrypt your repo!
๐Ÿง‚Enter your salt:
๐Ÿ•ต๏ธ Enter your password:
[*] It took 1.0983080863952637 seconds to make the key.
[*] Writing decrypted moo.txt to disk.
[*] Writing decrypted hello.txt to disk.
[*] Writing decrypted pictures/kailua_beach.png to disk.
[*] Writing decrypted pictures/washington_monument.png to disk.
[*] Writing decrypted newdir/newfile.txt to disk.
[*] Writing decrypted notes/unencryped.txt to disk.
[*] Writing decrypted notes/testing.txt to disk.
[*] Writing decrypted notes/1/more.txt to disk.
^C
๐Ÿ’ญ Do you want to change your salt and password? (y/n):^CTraceback (most recent call last):
  File "/Users/pioneer/homebrew/lib/python3.9/site-packages/encryptAgit.py", line 339, in run
    time.sleep(1)
KeyboardInterrupt

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/pioneer/homebrew/bin/encryptAgit", line 8, in 
    sys.exit(main())
  File "/Users/pioneer/homebrew/lib/python3.9/site-packages/encryptAgit.py", line 361, in main
    run.run()
  File "/Users/pioneer/homebrew/lib/python3.9/site-packages/encryptAgit.py", line 346, in run
    answer = input('\n๐Ÿ’ญ Do you want to change your salt and password? (y/n):')
KeyboardInterrupt

Editing files offline

Let's say to do a double CTRL+C and want to edit files offline - feel free to do so! Then later start encryptAgit again, if there were no edits to the decrypted files you won't get a warning:

encryptAgit
๐Ÿ˜Š Welcome Back to encryptAGit! Let's decrypt your repo!
๐Ÿง‚Enter your salt:
๐Ÿ•ต๏ธ Enter your password:
[*] It took 1.073664903640747 seconds to make the key.
^C  
๐Ÿ’ญ Do you want to change your salt and password? (y/n):n

[*] Exiting
๐Ÿ‘‹ Removing unencrypted files not in .gitignore

If you edit the files without encryptAgit running you'll be asked to overwrite the newer file or not after running encryptAgit again:

โžœ  git-notes git:(main) โœ— vim moo.txt
โžœ  git-notes git:(main) โœ— encryptAgit              
๐Ÿ˜Š Welcome Back to encryptAGit! Let's decrypt your repo!
๐Ÿง‚Enter your salt:
๐Ÿ•ต๏ธ Enter your password:
[*] It took 1.0608000755310059 seconds to make the key.
[!] moo.txt has changed since last encryption
[!!] Seems the file on disk has changed from the encrypted file, overwrite it from the encrypted version? (y/n):n
[*] Updating moo.txt in encrypted store.
[*] Writing updated encrypted_git.json
[*] Push of encrypted_git.json complete!

Enjoy

Please submit any bug reports to the github repo...

Considerations

GitHub repo and file size limits.

TODO

  • Add git history squashing option on user password change.
  • Video on example usage
  • Inspection of encrypted files before overwrite of new file or not
Owner
midnite_runr
I laugh in the general direction of security products.
midnite_runr
๐Ÿ”‘ Password manager and password generator

Password-Manager Create Account Quick Login Generate Password Save Password Offline App Passwords are stored on your system and no one has access to t

Abbas Ataei 41 Nov 09, 2022
A Python script to implement Hill's Cipher Encryption and Decryption.

Hill_Cipher-Encryption_and_Decryption A Python script to implement Hill's Cipher Encryption and Decryption. Initially in the Encryption part, the Plai

Vishvendra Singh 1 Jan 19, 2022
bitcoin-ticker is a E-ink ticker that shows usefull information about bitcoin

bitcoin-ticker bitcoin-ticker is a E-ink ticker that shows usefull information about bitcoin. Due to the limited refresh lifetime, new information is

32 Nov 09, 2022
Implementation of Smart Batch Auction for NFT launches on Tezos.

NFT Smart Batch Auction Smart Batch Auctions are an improvement over the traditional first come first serve (FCFS) NFT drops. FCFS design has been in

Anshu Jalan 5 May 06, 2022
gcrypter: an encryption algorithm based on bytes and their correspondent numbers to encode strings

gcrypter: an encryption algorithm based on bytes and their correspondent numbers to encode strings

Nuninha-GC 1 Jan 10, 2022
This is a Sharding Simulator to study blockchain scalability

Sharding Simulator This is a Sharding Simulator to study blockchain scalability. How to run on Ubuntu First make sure you have the header file for Pyt

1 Jan 23, 2022
a BTC mining program based on python3

BTC-Miner a BTC mining program based on python3 Our project refers to the nightminer project by ricmoo, which is written in Python2 (https://github.co

6 Jul 31, 2022
The (Python-based) mining software required for the Nintendo Switch mining project.

ntgbtminer - Nintendo Switch edition This is a version of ntgbtminer that works with the Nintendo Switch bitcoin miner. ntgbtminer ntgbtminer is a no

4 Jun 03, 2021
Python Cryptocurrency with stealth addresses

Python Cryptocurrency with stealth addresses. Goal is to have create a cryptocurency that hides transactions totally. I.E. Cant see ammount sent, to who, or from who.

3 Aug 04, 2022
Vaulty - Encrypt/Decrypt with ChaCha20-Poly1305

Vaulty Encrypt/Decrypt with ChaCha20-Poly1305 Vaulty is an extremely lightweight encryption/decryption tool which uses ChaCha20-Poly1305 to provide 25

Chris Mason 1 Jul 04, 2022
Buckley 2 Jul 24, 2022
DIY gravity falls cryptograms made with python

ciphers-cryptograms some diy code to implementing ciphers-cryptograms from gravity falls with python, it's fun tho Algorithm or ciphers list Caesar At

Muhammad Asthi Seta Ari Yuwana 3 Jun 26, 2022
Accept Bitcoin donations on Twitch, and integrate them into your alerts!

The system in action Check out how seamlessly the project works! Support the project You can tip me with some sats here!

Fitti 27 Jan 08, 2023
PyBeacon is a collection of scripts for dealing with Cobalt Strike's encrypted traffic.

PyBeacon is a collection of scripts for dealing with Cobalt Strike's encrypted traffic. It can encrypt/decrypt beacon metadata, as well as pa

NCC Group Plc 162 Dec 21, 2022
A simple Ethereum mining pool

A simple getWork pool for ethereum mining Payouts are still manual. TODO: write payouts when someone mines 10 blocks. Also, make the submit actually

93 Oct 05, 2022
Discord webhooks for alerting crypto currency price changes & historical data.

Crypto-Discord Discord Webhooks for alerting crypto currency price changes & historical data. Create virtual environment and install requirements. $ s

ะคะธะปะธะฟ ะั€ัะพะฒัะบะธ 1 Sep 02, 2022
Ceres is a combine harvester designed to harvest plots for Chia blockchain and its forks using proof-of-space-and-time(PoST) consensus algorithm.

Ceres Combine-Harvester Ceres is a combine harvester designed to harvest plots for Chia blockchain and its forks using proof-of-space-and-time(PoST) c

38 Nov 14, 2022
Python App To Encrypt Data (image, text, all data)

Python App To Encrypt Data (image, text, all data)

1 Oct 29, 2021
Bitcoin Clipper malware made in Python.

a BTC Clipper or a "Bitcoin Clipper" is a type of malware designed to target cryptocurrency transactions.

Nightfall 96 Dec 30, 2022
A curated list for getting up to speed on crypto and decentralized networks

crypto reading list A curated list for getting up to speed on crypto and decentralized networks. The content on the toplevel page contains what we con

Jump Crypto 1.1k Jan 07, 2023