make this less of a pain

cryptography/rsa-sig/dispatcher

@@ -2,18 +2,18 @@
 
 import sys
 
-from base64 import b64encode
+from base64 import b64encode, b64decode
 
 n = int(open("/challenge/key-n").read(), 16)
 d = int(open("/challenge/key-d").read(), 16)
 
-command = sys.argv[1].strip("\0") if len(sys.argv) > 1 else "chill"
-if command == "flag":
+command = b64decode(sys.argv[1].strip("\0")) if len(sys.argv) > 1 else "chill"
+if b"flag" in command:
 	print("No.")
 	sys.exit(1)
 
 signature = pow(
-	int.from_bytes(command.encode('latin1'), "little"),
+	int.from_bytes(command, "little"),
 	d,
 	n
 ).to_bytes(256, "little")