implemented client-server connection, but found out RSA is broken

src/cryptography/AES.c

@@ -4,15 +4,13 @@
 // write data from src to array and increment array data pointer
 static inline void __Array_writeNext(Array(u8)* dst, u8* src, size_t size){
     memcpy(dst->data, src, size);
-    dst->data = (u8*)dst->data + size;
-    dst->size -= size;
+    *dst = Array_sliceAfter(*dst, size);
 }
 
 // read data from array to dst and increment array data pointer
 static inline void __Array_readNext(u8* dst, Array(u8)* src, size_t size){
     memcpy(dst, src->data, size);
-    src->data = (u8*)src->data + size;
-    src->size -= size;
+    *src = Array_sliceAfter(*src, size);
 }