init

bcrypt.ctf.py

@@ -0,0 +1,29 @@
+def hashfn(x: bytes) -> int:
+    h = 18446744073709551614
+
+    for (i, b) in enumerate(x):
+        h *= h * (b + 1)
+        k = 59275109328752 * (i + 1)
+        for j in range(8):
+            k ^= b << (j * j)
+        h += k
+        h %= (2 ** 64)
+
+    return h
+
+
+print("It's not even worth trying, because bcrypt is perfect!")
+print("Whatever, it's your time that you're wasting anyway...")
+a = bytes(input("Message 1: "), 'utf-8')
+b = bytes(input("Message 2: "), 'utf-8')
+
+if a != b and hashfn(a) == hashfn(b):
+    flag = open('flag.txt').read()
+    print(
+        f"Congrats! Here's {len(flag)} characters of "
+        f"text for your hours of hard work: {flag}"
+    )
+elif a == b:
+    print("Those are the same message...")
+else:
+    print("Trivially false!")