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2024-06-09 14:48:10 +02:00
parent 3fd4d0d326
commit 584e1cef2d
59 changed files with 786 additions and 0 deletions
--- a/vault-door-8/sol.py
+++ b/vault-door-8/sol.py
@@ -0,0 +1,41 @@
+#!/home/maxime/.pyvenv/bin/python3
+
+def switch(i, a, b):
+    #print(bin(i))
+
+    mask_a = 1<<a
+    mask_b = 1<<b
+    #print(bin(mask_a), bin(mask_b))
+
+    bit_a = i & mask_a
+    bit_b = i & mask_b
+    #print(bin(bit_a), bin(bit_b))
+
+    rest = i & ((mask_a | mask_b) ^ 0xff)
+    #print(bin(rest))
+
+    if bit_a:
+        rest |= mask_b
+    if bit_b:
+        rest |= mask_a
+    #print(bin(rest))
+    #print()
+
+    return rest
+
+hex = [0xF4, 0xC0, 0x97, 0xF0, 0x77, 0x97, 0xC0, 0xE4, 0xF0, 0x77, 0xA4, 0xD0, 0xC5, 0x77, 0xF4, 0x86,
+       0xD0, 0xA5, 0x45, 0x96, 0x27, 0xB5, 0x77, 0xC2, 0xD2, 0x95, 0xA4, 0xF0, 0xD2, 0xD2, 0xC1, 0x95]
+
+for c in hex:
+    c = switch(c, 6, 7)
+    c = switch(c, 2, 5)
+    c = switch(c, 3, 4)
+    c = switch(c, 0, 1)
+    c = switch(c, 4, 7)
+    c = switch(c, 5, 6)
+    c = switch(c, 0, 3)
+    c = switch(c, 1, 2)
+    print(chr(c), end='')
+
+print()
+