Some Assembly Required 3

some_assembly_required_3/sol.py

@@ -0,0 +1,18 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+S = b'\x9dn\x93\xc8\xb2\xb9A\x8b\x94\xc6\xdf3\xc0\xc5\x95\xde7\xc3\x9f\x93\xdf?\xc9\xc3\xc2\x8c2\x93\x90\xc1\x8ee\x95\x9f\xc2\x8c6\xc8\x95\xc0\x90\x00\x00'
+s = b'\xf1\xa7\xf0\x07\xed'
+p = "picoCTF{"
+
+for i, char in enumerate(S):
+    key = s[4-(i%5)]
+    if key // 128 > 0:
+        key |= 0xffffff00
+        char ^= key
+        #print(bin((char ^ 0xffffffff) + 1))
+        print(chr(char ^ 0xffffff00), end='')
+    else:
+        char ^= key
+        #print(bin(char))
+        print(chr(char), end='')
+