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🔒 Fix SQL Injection in MainController.loadMemberInfo #88

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🔒 Fix SQL Injection in MainController.loadMemberInfo #88

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22 changes: 19 additions & 3 deletions src/library/assistant/database/DatabaseHandler.java
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ private static void inflateDB() {
System.out.println("Already loaded tables " + loadedTables);
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(DatabaseHandler.class.getClass().getResourceAsStream("/resources/database/tables.xml"));
Document doc = dBuilder.parse(DatabaseHandler.class.getResourceAsStream("/resources/database/tables.xml"));
NodeList nList = doc.getElementsByTagName("table-entry");
for (int i = 0; i < nList.getLength(); i++) {
Node nNode = nList.item(i);
Expand Down Expand Up @@ -89,7 +89,7 @@ private static void createConnection() {
conn = DriverManager.getConnection(DB_URL);
}
catch (Exception e) {
JOptionPane.showMessageDialog(null, "Cant load database", "Database Error", JOptionPane.ERROR_MESSAGE);
LOGGER.log(Level.ERROR, "Cant load database", e);
System.exit(0);
}
}
Expand Down Expand Up @@ -123,14 +123,30 @@ public ResultSet execQuery(String query) {
return result;
}

public ResultSet execQuery(String query, Object... params) {
ResultSet result;
try {
PreparedStatement pstmt = conn.prepareStatement(query);
for (int i = 0; i < params.length; i++) {
pstmt.setObject(i + 1, params[i]);
}
result = pstmt.executeQuery();
}
catch (SQLException ex) {
LOGGER.log(Level.ERROR, "Exception at execQuery:dataHandler", ex);
return null;
}
return result;
}

public boolean execAction(String qu) {
try {
stmt = conn.createStatement();
stmt.execute(qu);
return true;
}
catch (SQLException ex) {
JOptionPane.showMessageDialog(null, "Error:" + ex.getMessage(), "Error Occured", JOptionPane.ERROR_MESSAGE);
LOGGER.log(Level.ERROR, "Error:" + ex.getMessage(), ex);
System.out.println("Exception at execQuery:dataHandler" + ex.getLocalizedMessage());
return false;
}
Expand Down
4 changes: 2 additions & 2 deletions src/library/assistant/ui/main/MainController.java
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Original file line number Diff line number Diff line change
Expand Up @@ -187,8 +187,8 @@ private void loadMemberInfo(ActionEvent event) {
enableDisableGraph(false);

String id = memberIDInput.getText();
String qu = "SELECT * FROM MEMBER WHERE id = '" + id + "'";
ResultSet rs = databaseHandler.execQuery(qu);
String qu = "SELECT * FROM MEMBER WHERE id = ?";
ResultSet rs = databaseHandler.execQuery(qu, id);
Boolean flag = false;
try {
while (rs.next()) {
Expand Down