From eb3fc69e8461b61597a6837618bed27d4385f2e6 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Sun, 27 Apr 2025 12:07:12 +0800
Subject: Controlling servo with xor encryption (wo session key).

---
 lock/bend.c | 7 ++++---
 lock/fend.c | 6 ++++--
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lock/bend.c b/lock/bend.c
index 8436770..b0a0074 100644
--- a/lock/bend.c
+++ b/lock/bend.c
@@ -134,11 +134,12 @@ int main(void)
 			n = radio_recv(buf, WDLEN);
 			buf[n] = '\0';	
 			rxd = 0;
+			xor(KEY, buf, msg, WDLEN + 1);
 			uart_write("recv: ");
-			uart_write(buf);
-			if (strncmp(buf, LOCK, WDLEN) == 0)
+			uart_write(msg);
+			if (strncmp(msg, LOCK, WDLEN) == 0)
 				lock();
-			else if (strncmp(buf, UNLOCK, WDLEN) == 0)
+			else if (strncmp(msg, UNLOCK, WDLEN) == 0)
 				unlock();
 		}
 	}
diff --git a/lock/fend.c b/lock/fend.c
index 927c310..e44155b 100644
--- a/lock/fend.c
+++ b/lock/fend.c
@@ -62,8 +62,9 @@ int main(void)
 
 	for (;;) {
 		if (islock) {
+			xor(KEY, LOCK, buf, WDLEN);
 			do {
-				sync = radio_sendto(txaddr, LOCK, WDLEN);
+				sync = radio_sendto(txaddr, buf, WDLEN);
 				_delay_ms(50);
 			} while (!sync);
 			sync = 0;
@@ -72,8 +73,9 @@ int main(void)
 		}
 
 		if (isunlock) {
+			xor(KEY, UNLOCK, buf, WDLEN);
 			do {
-				sync = radio_sendto(txaddr, UNLOCK, WDLEN);
+				sync = radio_sendto(txaddr, buf, WDLEN);
 				_delay_ms(50);
 			} while (!sync);
 			sync = 0;
-- 
cgit v1.2.3