Initial commit of bin/nntp-tiny-passwd tool to change user passwords

bin/nntp-tiny-passwd

@@ -0,0 +1,57 @@
+#! /usr/bin/env python3
+
+import sys
+import os
+import argparse
+import getpass
+
+from nntp.tiny.config import Config
+from nntp.tiny.db     import Database
+from nntp.tiny.user   import User
+from nntp.tiny.passwd import crypt
+
+parser = argparse.ArgumentParser(description='Set password of account')
+parser.add_argument('--config-file', '-f', type=str,            help='Specify a configuration file location')
+parser.add_argument('username',            type=str,            help='Username of account')
+
+args = parser.parse_args()
+
+config = Config.load(args.config_file)
+db     = Database.connect(config.get('database', 'path'))
+
+user = db.get(User, {'username': args.username})
+
+if user is None:
+    print(f"{sys.argv[0]}: unknown user '{args.username}'", file=sys.stderr)
+    exit(1)
+
+attempts_total = 3
+attempts_left  = attempts_total
+
+while attempts_left > 0:
+    attempts_left -= 1
+
+    password_1 = getpass.getpass()
+
+    if password_1 == '':
+        continue
+
+    password_2 = getpass.getpass('Enter password again: ')
+
+    if password_1 != password_2:
+        continue
+
+    user.password = crypt(password_2)
+
+    try:
+        db.update(user)
+    except Exception as e:
+        print(f"Unable to change password for user '{args.username}': {e}")
+        exit(1)
+
+    print(f"Password changed successfully for user '{args.username}'.")
+    exit(0)
+
+if attempts_left == 0:
+    print(f"Failed to change password for user '{args.username}' after {attempts_total} attempts.", file=sys.stderr)
+    exit(1)