assert!

src/lc6_user.c

 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <assert.h>
 
 #include "../inc/lc6_crypto.h"
 
 LC6_USER* lc6user_create(void) {
 	LC6_USER *user = malloc(sizeof(LC6_USER));
+	assert(user);
+	memset(user, 0, sizeof(LC6_USER));
 
 	return lc6crypto_genuserkey(user);
 }