fix having fixed size key

rnex-core/src/kerberos/mod.rs

@@ -26,7 +26,7 @@ pub const SESSION_KEY_LENGTH: usize = SESSION_KEY_LENGTH_TY::USIZE;
 type Md5Hmac = Hmac<md5::Md5>;
 
 pub fn derive_key(pid: u32, password: &[u8]) -> [u8; 16] {
-    let iteration_count = 65000 + pid % 1024 - 1;
+    let iteration_count = 65000 + pid % 1024;
     // we do one iteration out here to ensure the key is always 16 bytes
 
     let mut key: [u8; 16] = {
@@ -35,7 +35,7 @@ pub fn derive_key(pid: u32, password: &[u8]) -> [u8; 16] {
         md5.finalize().try_into().unwrap()
     };
 
-    for _ in 0..iteration_count {
+    for _ in 1..iteration_count {
         let mut md5 = Md5::new();
         md5.update(key);
         key = md5.finalize().try_into().unwrap();

rnex-core/src/nex/account.rs

@@ -4,29 +4,23 @@ use macros::RmcSerialize;
 pub struct Account {
     pub pid: u32,
     pub username: String,
-    pub kerbros_password: [u8; 16],
+    pub kerbros_password: Box<[u8]>,
 }
 
 impl Account {
     pub fn new(pid: u32, username: &str, passwd: &str) -> Self {
         let passwd_data = passwd.as_bytes();
 
-        let mut passwd = [0u8; 16];
-
-        for (idx, byte) in passwd_data.iter().enumerate() {
-            passwd[idx] = *byte;
-        }
-
         Self {
-            kerbros_password: passwd,
+            kerbros_password: passwd.as_bytes().into(),
             username: username.into(),
             pid,
         }
     }
 
-    pub fn new_raw_password(pid: u32, username: &str, passwd: [u8; 16]) -> Self {
+    pub fn new_raw_password(pid: u32, username: &str, passwd: &[u8]) -> Self {
         Self {
-            kerbros_password: passwd,
+            kerbros_password: passwd.into(),
             username: username.into(),
             pid,
         }