(crossposted on my blog jenglert.gitlab.io once I figure out a Hugo build error)
Based on the thread here:
https://forum.obsidian.md/t/ability-to-encrypt-text/3206?u=juen
I decided to write two small python functions that allow me to encrypt & decrypt individual files such as a personal journaling note.
Both functions are sitting in my Obsidian vault and I call them via the command line to encrypt a note by setting a key.
Code below; simply save the functions as .py in your vault and set path_folderto your vault.
Maybe someone can could even make it into a plugin that can directly encrypt/decrypt notes from the Obsidian interface.
encrypt
from Crypto.Cipher import AES
path_folder="C:\\Users\Admin\Google Drive\Obsidian\\"
def encrypt():
'''
AES key must be either 16, 24, or 32 bytes long
'''
sep = b'---\n\n' # separate metadata from note
file = input("Enter file name: ")
with open(path_folder+file, 'rb') as f:
everything = f.read()
metadata = everything[:everything.index(sep)+len(sep)]
data = everything[everything.index(sep)+len(sep):]
key = input("Enter key: ").encode('utf-8')
cipher = AES.new(key, AES.MODE_CTR)
ct = cipher.encrypt(data)
nonce = cipher.nonce
with open(path_folder+file, 'wb') as f:
f.write(metadata)
with open(path_folder+file, 'ab') as f:
f.write(nonce+ct)
print("File encrypted")
encrypt()
decrypt
from Crypto.Cipher import AES
path_folder="C:\\Users\Admin\Google Drive\Obsidian\\"
def decrypt():
sep = b'---\n\n' # separate metadata from note
file = input("Enter file name: ")
with open(path_folder+file, 'rb') as f:
everything = f.read()
metadata = everything[:everything.index(sep)+len(sep)]
rest = everything[everything.index(sep)+len(sep):]
nonce = rest[:8]
ct = rest[8:]
key = input("Enter key: ").encode('utf-8')
cipher = AES.new(key, AES.MODE_CTR, nonce=nonce)
pt = cipher.decrypt(ct)
with open(path_folder+file, 'wb') as f:
f.write(metadata)
with open(path_folder+file, 'ab') as f:
f.write(pt)
print("File decrypted")
decrypt()
See here if you have trouble with No module named Crypto.Cipher.