diff --git a/src/common/util.rs b/src/common/util.rs
deleted file mode 100644
index 0c85032..0000000
--- a/src/common/util.rs
+++ /dev/null
@@ -1,63 +0,0 @@
-
-pub fn array_to_utf8<const X: usize>(array: [u8; X]) -> Result<String, std::string::FromUtf8Error> {
-    String::from_utf8(array.to_vec())
-        .map(|mut s| {
-            if let Some(index) = s.find("\u{0}") {
-                s.truncate(index);
-            }
-            s
-        })
-}
-
-#[macro_export]
-macro_rules! utf8_to_array {
-    ($s: expr, $size: expr) => {
-        {
-            let mut array = [0u8; $size];
-            let bytes = $s.as_bytes();
-            array[..bytes.len()].clone_from_slice(&bytes);
-            array
-        }
-    }
-}
-
-#[macro_export]
-macro_rules! utf8_to_utf16_array {
-    ($s: expr, $size: expr) => {
-        {
-            let mut array = [0u16; $size];
-            //let bytes = $s.as_bytes();
-            let bytes = $s.encode_utf16().collect::<Vec<_>>();
-            array[..bytes.len()].clone_from_slice(&bytes);
-            array
-        }
-    }
-}
-
-
-
-
-#[cfg(test)]
-mod test {
-    #[test]
-    fn test_utf8_to_array() {
-        let s = "asdf".to_owned();
-        let a = utf8_to_array!(s, 8);
-
-        let mut e = [0u8; 8];
-        e[..4].clone_from_slice(b"asdf");
-        assert!(a == e);
-    }
-
-    #[test]
-    fn utf8_to_utf16_array() {
-        let utf16 = utf8_to_utf16_array!("asdf", 16);
-        assert!(utf16 == [97, 115, 100, 102, 0,0,0,0,0,0,0,0,0,0,0,0])
-    }
-
-    #[test]
-    fn utf8_to_utf16_array_unicode() {
-        let utf16 = utf8_to_utf16_array!("あいうえお", 16);
-        assert!(utf16 == [0x3042 , 0x3044, 0x3046, 0x3048, 0x304A, 0,0,0,0,0,0,0,0,0,0,0])
-    }
-}
diff --git a/src/login/login.rs b/src/login/login.rs
index b47afc8..a2c1c85 100644
--- a/src/login/login.rs
+++ b/src/login/login.rs
@@ -8,10 +8,10 @@ use bcrypt;
 use libpso::packet::login::*;
 use libpso::{PacketParseError, PSOPacket};
 use libpso::crypto::bb::PSOBBCipher;
+use libpso::util::array_to_utf8;
 
 use crate::common::cipherkeys::{ELSEWHERE_PRIVATE_KEY, ELSEWHERE_PARRAY};
 use crate::common::serverstate::{SendServerPacket,  RecvServerPacket, ServerState, OnConnect, ClientId};
-use crate::common::util::array_to_utf8;
 
 use crate::entity::gateway::EntityGateway;
 use crate::entity::account::UserAccount;