session: trim or pad session key to 16 bytes

Author: oiweiwei

session.go

@@ -129,7 +129,8 @@ func sessionSetup(conn *conn, i Initiator, ctx context.Context) (*session, error
 	}
 
 	if s.sessionFlags&(SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL) == 0 {
-		sessionKey := i.SessionKey()
+
+		sessionKey := padSessionKey(i.SessionKey())
 
 		switch conn.dialect {
 		case SMB202, SMB210:
@@ -256,6 +257,12 @@ func sessionSetup(conn *conn, i Initiator, ctx context.Context) (*session, error
 	return s, nil
 }
 
+func padSessionKey(key []byte) []byte {
+	newKey := make([]byte, 16)
+	copy(newKey, key)
+	return newKey
+}
+
 type session struct {
 	*conn
 	treeConnTables            map[uint32]*treeConn