Initial data commit

Task/Chaocipher/Arc/chaocipher-1.arc

@@ -0,0 +1,35 @@
+(= lshift '((0 1) (2 14) (1 2) (14 26)))
+(= rshift '((1 3) (4 15) (3 4) (15 26) (0 1)))
+
+(= rot (fn (alpha shift)
+  (let shift (mod shift 26)
+    (string (cut alpha shift) (cut alpha 0 shift)))))
+
+(= scramble-wheel (fn (alpha moves)
+  (= oput '())
+  (up i 0 (- (len moves) 1)
+      (push (cut alpha ((moves i) 0) ((moves i) 1)) oput))
+  (= oput (string (rev oput)))))
+
+(= chaocipher (fn (left right msg (o crypted) (o dec?))
+  (unless crypted
+    (prn "Encoding " msg " with chaocipher")
+    (prn left " " right))
+  (when dec? (swap left right))
+    (= offset ((positions (msg 0) right) 0))
+    (= left (rot left offset))
+    (= right (rot right offset))
+    (push (cut left 0 1) crypted)
+  (when dec? (swap left right))
+  (prn (scramble-wheel left lshift)
+   " " (scramble-wheel right rshift))
+  (if (> (len msg) 1)
+      (chaocipher (scramble-wheel left lshift)
+             (scramble-wheel right rshift)
+                  (cut msg 1) crypted dec?)
+      (string (rev crypted)))))
+
+(chaocipher "HXUCZVAMDSLKPEFJRIGTWOBNYQ" "PTLNBQDEOYSFAVZKGJRIHWXUMC"
+            "WELLDONEISBETTERTHANWELLSAID")
+(chaocipher "HXUCZVAMDSLKPEFJRIGTWOBNYQ" "PTLNBQDEOYSFAVZKGJRIHWXUMC"
+            "OAHQHCNYNXTSZJRRHJBYHQKSOUJY" nil 1)