From ada711f1821aa5ca053620af90b63ae60db2db3e Mon Sep 17 00:00:00 2001
From: Felix Pankratz <mail@felixpankratz.de>
Date: Fri, 5 May 2023 19:40:28 +0200
Subject: [PATCH] initial commit

---
 .gitignore |  2 ++
 raps.py    | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 raps.py

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..92e5967
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+secret
+*.swp
diff --git a/raps.py b/raps.py
new file mode 100644
index 0000000..3344aeb
--- /dev/null
+++ b/raps.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+import random
+import secrets
+import os
+import hashlib
+
+SECRET_FILE = 'secret'
+
+def create_secret():
+    return secrets.token_hex(128)
+
+def generate_password():
+    import string
+    alphabet = string.ascii_letters + string.digits
+    return ''.join(random.choice(alphabet) for i in range(24))
+
+def month_timestamp():
+    import datetime
+    today = datetime.datetime.now()
+    start_of_month = datetime.datetime(today.year, today.month, 1, 0, 0, 0, 0)
+    return int(start_of_month.timestamp())
+
+def generate_seed(secret):
+    m = hashlib.sha256()
+    m.update(bytes.fromhex(secret))
+    m.update(str(month_timestamp()).encode())
+    return m.digest()
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(prog='Remote Admin Password Solution', description='Generate rotating passwords based on a shared secret')
+    parser.add_argument('--new-secret', action='store_true', help='generate a new secret')
+
+    args = parser.parse_args()
+
+    secret = ''
+    if not os.path.isfile(SECRET_FILE) or args.new_secret:
+        print('Generating a new secret... ', end='')
+        secret = create_secret()
+        with open(SECRET_FILE, 'w') as f:
+            f.write(secret)
+        print('done. Send this to the other party:')
+        print(secret)
+
+    else:
+        secret = open(SECRET_FILE, 'r').read().strip()
+        print('Secret loaded.')
+
+    random.seed(generate_seed(secret))
+    
+    print('The password of the month is:')
+    print(generate_password())
+
+if __name__ == '__main__':
+    main()