feat: implement encryption

src/util.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "hwinfo.h"
+
+#include <stdint.h>
+
+#define FNV_PRIME 0x00000100000001b3
+
+// Generate an aes key by hashing the input
+// This hash is not safe in any way
+// But it is fast and easy to implement!
+// https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function
+void dual_fnv_hash(char* input, uint8_t key[16]);
+
+uint8_t* hwinfo_to_key(hw_info_t hwinfo);