Summary

This is an educational script written in Python to demonstrate encrypting and decrypting files in a directory, acting like ransomware.

The locker.py script performs two operations in the current working directory only (does not recurse sub-directories):

1. encryptes each file's contents

2. adds a second file extension, .encrypted.

The unlocker.py script restores the files to their unencrypted form.

Usage

Clone Repo.

git clone https://github.com/raresteak/python-file-encryption.git

Execute locker.py to encrypt the demo files from the repository. This will encrypt files in the same directory.

./locker.py

Output

$ ./locker.py 
Encrypting: spreadsheet1.ods
Encrypted: spreadsheet1.ods.encrypted
Encrypting: file2.txt
Encrypted: file2.txt.encrypted
Encrypting: spreadsheet2.xlsx
Encrypted: spreadsheet2.xlsx.encrypted
Encrypting: file1.txt
Encrypted: file1.txt.encrypted
Encrypting: document1.odt
Encrypted: document1.odt.encrypted
Encrypting: document2.docx
Encrypted: document2.docx.encrypted
Your files are encrypted, have a nice day.

Encryption key written to

.key

Execute unlocker.py to decrypt files.

./unlocker.py

Output

$ ./unlocker.py 
Decrypting: document2.docx.encrypted
Decrypted: document2.docx
Decrypting: file1.txt.encrypted
Decrypted: file1.txt
Decrypting: file2.txt.encrypted
Decrypted: file2.txt
Decrypting: spreadsheet1.ods.encrypted
Decrypted: spreadsheet1.ods
Decrypting: spreadsheet2.xlsx.encrypted
Decrypted: spreadsheet2.xlsx
Decrypting: document1.odt.encrypted
Decrypted: document1.odt
Your files are decrypted, have a nice day.

Disclaimer

This code is provided for educational purposes and testing. Use at your own risk, I am not responsible for any misuse or mischief.