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allows one to easily encrypt and decrypt files symmetrically using openssl and python3

Project description


This code allows one to easily encrypt and decrypt files symmetrically using openssl and python3.

Uses aes-256-cbc for file encryption, with salt, sha256 key stretching and sha256 checksum.


You can install using

pip install fileenc-openssl


From command line:

fileenc --key 'password123' --input '*.png' --check --overwrite
filedec --key 'password123' --input '*.png.enc' --check --overwrite --remove

From python:

from fileenc_openssl import stretch_key, encrypt_file, decrypt_file
stretched_key = stretch_key('password123')
enc_pth = encrypt_file(raw_pth, key=stretched_key)
res_pth = decrypt_file(enc_pth, key=stretched_key)

Testing (needs py.test):



You can find all options using fileenc --help:

-h, --help              show this help message and exit
-k KEY, --key KEY       the key to use for encryption; you will be prompted for one if this is not provided (more secure)
-i INP, --input INP     input file, directory or pattern (as a single string) (.enc will be appended)
-o OUTP, --output OUTP  optionally, output file or directory (.enc will be stripped if available)
-d, --decrypt           decrypt the input file(s) (as opposed to encrypt, which is the default)
-f, --overwrite         overwrite existing files when decrypting (encrypting always overwrites)
-r, --remove            remove the input file after en/decrypting (after --check)
-c, --check             test the encryption by reversing it (abort on failure) (only for ENcryption due to salting)


Revised BSD License; at your own risk, you can mostly do whatever you want with this code, just don’t use my name for promotion and do keep the license file.


  • Multiprocessing for multiple files
  • Faster checksum algorithm?

Project details

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