From 229806da0f99fa187115d7a30de85def60ef5999 Mon Sep 17 00:00:00 2001
From: Nunu <kamilsos@gmail.com>
Date: Wed, 31 Jan 2024 18:11:44 +0100
Subject: [PATCH] fix enc key initialization after boot

---
 app/app.c       | 10 ++++++++++
 app/messenger.c |  3 +++
 helper/crypto.c |  2 ++
 helper/crypto.h |  6 +++---
 settings.c      |  3 +--
 5 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/app/app.c b/app/app.c
index fc154a7..2dfc01b 100644
--- a/app/app.c
+++ b/app/app.c
@@ -65,6 +65,9 @@
 #ifdef ENABLE_MESSENGER
 	#include "app/messenger.h"
 #endif
+#ifdef ENABLE_ENCRYPTION
+	#include "helper/crypto.h"
+#endif
 
 #ifdef ENABLE_MESSENGER_NOTIFICATION
 	bool gPlayMSGRing = false;
@@ -1309,6 +1312,13 @@ void APP_TimeSlice500ms(void)
 			} else if (hasNewMessage == 2) {
 				hasNewMessage = 1;
 			}
+		}	
+	#endif
+
+	#ifdef ENABLE_ENCRYPTION
+		if(gRecalculateEncKey){
+			CRYPTO_Generate256BitKey(gEeprom.ENC_KEY, gEncryptionKey, sizeof(gEeprom.ENC_KEY));
+			gRecalculateEncKey = false;
 		}
 	#endif
 
diff --git a/app/messenger.c b/app/messenger.c
index 69bdbae..b17416c 100644
--- a/app/messenger.c
+++ b/app/messenger.c
@@ -682,6 +682,9 @@ void MSG_Init() {
 	prevKey = 0;
     prevLetter = 0;
 	cIndex = 0;
+	#ifdef ENABLE_ENCRYPTION
+		gRecalculateEncKey = true;
+	#endif
 }
 
 void MSG_SendAck() {
diff --git a/helper/crypto.c b/helper/crypto.c
index ddf9057..3eeea30 100644
--- a/helper/crypto.c
+++ b/helper/crypto.c
@@ -19,6 +19,8 @@
 #include "driver/bk4819.h"
 #include "driver/systick.h"
 
+bool     gRecalculateEncKey;
+
 u_int8_t gEncryptionKey[32];
 
 // salt used for hashing encryption key from eeprom used for sending packets
diff --git a/helper/crypto.h b/helper/crypto.h
index 55f8d6c..c7de281 100644
--- a/helper/crypto.h
+++ b/helper/crypto.h
@@ -13,10 +13,10 @@
  *     See the License for the specific language governing permissions and
  *     limitations under the License.
  */
-
+#include <stdbool.h>
 #include <stdint.h>
-
-extern uint8_t gEncryptionKey[32];
+extern bool          gRecalculateEncKey;
+extern uint8_t       gEncryptionKey[32];
 static const uint8_t encryptionSalt[4][8];
 static const uint8_t displaySalt[32];
 
diff --git a/settings.c b/settings.c
index 01470c1..6ffca73 100644
--- a/settings.c
+++ b/settings.c
@@ -277,8 +277,7 @@ void SETTINGS_SaveEncryptionKey()
 {	
 	EEPROM_WriteBuffer(0x0F30, gEeprom.ENC_KEY, true);
 	EEPROM_WriteBuffer(0x0F38, gEeprom.ENC_KEY + 8, true);
-
-	CRYPTO_Generate256BitKey(gEeprom.ENC_KEY, gEncryptionKey, sizeof(gEeprom.ENC_KEY));
+	gRecalculateEncKey = true;
 }
 #endif