Add basic implementation of XModem

main.py

@@ -0,0 +1,22 @@
+if __name__ == "__main__":
+
+    message = format(int.from_bytes(input().encode("ASCII"), "big"), "b")
+    generator = "10001000000100001"
+    gen_deg = len(generator)
+
+    message += "0" * (gen_deg - 1)
+    if len(message) % 2 != 0:
+        message = "0" + message
+
+    while True:
+
+        if message[0] == "0":
+            message = message[1:]
+        else:
+            chunk = message[:gen_deg]
+            if len(chunk) < gen_deg:
+                print(hex(int(chunk, 2)))
+                break
+
+            remainder = format(int(chunk, 2) ^ int(generator, 2), "b")
+            message = remainder + message[gen_deg:]