Version 1.0

decrypt.py

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