Change keygen.py to not require root

keygen.py now recommends that you run it as the user you want to have
ownership of secret.key and uploadkeys (such as www-data for nginx).
Then, if uploadkeys or secret.key don't exist, they will be created with
the correct ownership.

keygen.py

@@ -8,11 +8,6 @@ import sys
 import os
 
 
-# Check if the script was run as root
-if os.geteuid() != 0:
-    exit("Root privileges are necessary to run this script.\nPlease try again as root or using `sudo`.")
-
-
 # Check if encryption key already exists
 enckey = Path(settings.ENCKEY_PATH)
 if enckey.is_file():
@@ -63,20 +58,26 @@ def ask_yn(msg):
     return proceed
 
 
-N = 64  # Size of token
+start = ask_yn("Have you run this program as the correct user (for example, nginx uses www-data)? [y/n] ")
+if not start:
+    print("Please run this as the correct user with: sudo su [user] -s /bin/sh -c 'python3 keygen/py'")
 
-# Generate key
-token = ''.join(secrets.choice(string.ascii_letters + string.digits) for i in range(N))
-
-# Decrypt the existing keyfile
-key = load_key()
-keyf = Fernet(key)
-
-genkey = True
-uploadkeysp = Path("uploadkeys")
-if not uploadkeysp.is_file():
-    uploadkeysp.touch()
 else:
+
+    N = 64  # Size of token
+
+    # Generate key
+    token = ''.join(secrets.choice(string.ascii_letters + string.digits) for i in range(N))
+
+    # Decrypt the existing keyfile
+    key = load_key()
+    keyf = Fernet(key)
+
+    genkey = True
+    uploadkeysp = Path("uploadkeys")
+    if not uploadkeysp.is_file():
+        uploadkeysp.touch()
+    else:
         with open("uploadkeys", "rb") as ukf:
             # read the encrypted data
             encrypted_data = ukf.read()
@@ -97,6 +98,6 @@ else:
                 if not proceed2:
                     genkey = False
 
-if genkey:
+    if genkey:
         print("Your new token is: " + str(token))  # Print token
         encrypt_key(str(token))  # Encrypt the key and save