6403ac2a33c5d447bc76179f

.gitignore

@@ -1 +1,8 @@
 *.txt
+*.out
+*.zip
+*.so
+
+.vscode/
+*.dSYM/
+

rainerzimmerman-keygen/rainerzimmerman-keygen.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+# Link: https://crackmes.one/crackme/6403ac2a33c5d447bc76179f
+
+# Conditions that must be fulfilled for the key to be valid:
+# 1. len(key) == 13 && key[3] == "-"
+# (2. sum1 = sum(key[0:3])))
+# 3. (key[0] ^ sum1 % 3) == sum(key[4:7])
+# 4. (key[1] ^ sum1 % 3) == sum(key[7:10])
+# 5. (key[2] ^ sum1 % 3) == sum(key[10:13])
+
+import random
+
+
+def complete(base):
+    s = ["", "", ""]
+    base_sum = sum(base)
+
+    for i in range(3):
+        c = base[i] ^ base_sum % 3
+        s[i] = "".join(str(n) for n in find_sum(c))
+
+    return f"{''.join(str(n) for n in base)}-{s[0]}{s[1]}{s[2]}"
+
+
+def find_sum(total):
+    while True:
+        x = random.randint(0, 9)
+        y = random.randint(0, 9)
+        z = random.randint(0, 9)
+
+        if x + y + z == total:
+            break
+
+    return x, y, z
+
+
+while True:
+    base = [random.randint(0, 9) for _ in range(3)]
+    print(complete(base))