cryptoconfig

Python class for handling encrypted elements in a config file. Extension of ConfigParser.

This class overides the 'get' method of ConfigParser replacing it with Fernet symmetric encryption so that you can safely store encrypted passwords in an ini file.

Example ini file.

[PARSE_TEST]
user = dmartin
password = ba$1234!
password_encoded = enc(gAAAAABa7JOds0uLwiKb44pTUvLuzbcxLsmpWL7kCFYTKX0JTW6q_JLubSKFrecCF1ShsMvzEBnt16Da_LsgUN5ff5LwB6zwPw==)

Example code to parse the above ini example. Note: The encoded password is the same as the unencoded to demonstrate the use. Storing the crypt_key in the program should be discouraged. A better example would load the key from an environment variable.

from crypto_config import cryptoconfigparser
import os
import sys

if __name__ == "__main__":
    try:
        # CryptoConfigParser application encrypton string
        key = '-nBUOebi1SsnpU8k7lHym6oHSFN5Id3xM0Wezh8DHxg='

        properties = cryptoconfigparser.CryptoConfigParser(crypt_key=key)
        properties_file = os.path.dirname(__file__) + "/sample_parse.ini"
        properties.read(properties_file)
    
        user = properties.get('PARSE_TEST', 'user')
        password = properties.get('PARSE_TEST', 'password')
        password_encoded = properties.get('PARSE_TEST', 'password_encoded')
    except cryptoconfigparser.ParsingError as err:
        print('Could not parse:', err)
        sys.exit(1)

    print(f"user: {user} password: {password} decoded: {password_encoded}")

To install this from git use:

pip install git+https://github.com/NREL/CryptoConfig.git

This package installs a helper command line utility called cryptocfg.py to generate, encrypt, and decrypt Fernet password strings.

use: cryptocfg.py [options]
where options include:
	--decrypt= | -d, decrypt the string, requires -i and -p 
	--encrypt= | -e, encrypt the string, requires -i and -p 
	--input= | -i, string to encrypt or decrypt, if not supplied read from stdin
	--password= | -p, key for encrypting or decrypting a string, if not supplied will be prompted for
	--genkey generate an encryption/decryption string
examples:
Encrypt:
cryptocfg.py -i 'f00Baz!1234$' -p 'jsZ9EkC3_XnP88UwIGQdFWpKPpeaD61RqJy8DE6lLYk=' -e
Decrypt:
cryptocfg.py -i 'gAAAAABa8IpcHE03lpmYYhptWlkOqKMvstpbYlHqp9Asq5qVY024X7OhokVto2aF_uzCRP47OVdHT5VE6f32xIvvoMlDX3_Ceg==' -p 'jsZ9EkC3_XnP88UwIGQdFWpKPpeaD61RqJy8DE6lLYk=' -d