57 lines
2.1 KiB
Python
57 lines
2.1 KiB
Python
##################################################
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## ____ ___ ____ _____ _ _ _____ _____ ##
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## / ___/ _ \| _ \| ____| | \ | | ____|_ _| ##
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## | | | | | | |_) | _| | \| | _| | | ##
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## | |__| |_| | _ <| |___ _| |\ | |___ | | ##
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## \____\__\_\_| \_\_____(_)_| \_|_____| |_| ##
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##################################################
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## Project: Elysium ##
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## File: decrypt.py ##
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## Version: 1.0 ##
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## Support: support@cqre.net ##
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##################################################
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# Installation notes:
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# Install PyCryptodome with "pip install pycryptodome". Must be run with python3.
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from Crypto.Cipher import AES
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import hashlib
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import os
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# Ask for the encrypted file's name
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encrypted_file_name = input("Enter the name of the encrypted file (with .enc extension): ")
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encrypted_file_path = f'path/to/your/encrypted/{encrypted_file_name}'
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decrypted_file_path = encrypted_file_path.replace('.enc', '.zip')
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# Try to retrieve the passphrase from the environment variable
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passphrase = os.getenv('ELYSIUM_PASSPHRASE')
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if passphrase is None:
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passphrase = input("Passphrase not found in environment. Please enter the passphrase: ")
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# Here, you might save the passphrase to a temporary session or file, but be cautious with security.
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# Derive the AES key from the passphrase
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key = hashlib.sha256(passphrase.encode()).digest()
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try:
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# Read the encrypted file
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with open(encrypted_file_path, 'rb') as encrypted_file:
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iv = encrypted_file.read(16) # The first 16 bytes are the IV
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encrypted_data = encrypted_file.read()
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# Decrypt the data
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cipher = AES.new(key, AES.MODE_CBC, iv)
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decrypted_data = cipher.decrypt(encrypted_data)
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# Remove potential PKCS#7 padding
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pad_len = decrypted_data[-1]
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decrypted_data = decrypted_data[:-pad_len]
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# Write the decrypted data to a file
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with open(decrypted_file_path, 'wb') as decrypted_file:
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decrypted_file.write(decrypted_data)
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print(f"File has been decrypted: {decrypted_file_path}")
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except Exception as e:
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print(f"An error occurred: {str(e)}")
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