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BurpSuite Custom Header extension

Joe | Last updated: Mar 09, 2023 05:12PM UTC

I am attempting to write a custom Burp extension based on the example code from https://github.com/PortSwigger/burp-extensions-montoya-api-examples/tree/main/customlogger. The plugin is intended to perform the following actions: 1. Take custom headers from a JTextField. 2. Set these headers in every request via RequestToBeSentAction. However, I am encountering an issue where the values set in the JTextField are not present in the modified request. I have shared my code in the following links: CustomLogger.java: https://codeshare.io/km8QQM MyHttpHander.java: https://codeshare.io/PdEooe MyTableModel.java: https://codeshare.io/6pk0Rg The logic to create text area inputs for headers is as follows: textArea=new JTextArea("X:1"); String text = textArea.getText(); String[] lines = text.split("\n"); headerlist = new ArrayList<>(); for (String line : lines) { // headerlist.add(line); String[] keyvalue = line.split(":"); headerlist.add(httpHeader(keyvalue[0], keyvalue[1])); api.logging().logToOutput(line); api.logging().logToOutput(keyvalue[0] + ":"+keyvalue[1]); } In the initialize function, I registered the HttpHandler as follows: api.http().registerHttpHandler(new MyHttpHandler(tableModel, headerlist)); Despite this, the newly added headers from the text area are not being included in the requests. I am not sure whether I need to synchronize the values of textArea, as my knowledge in programming is limited. Any help would be greatly appreciated. Thank you.

Hannah, PortSwigger Agent | Last updated: Mar 10, 2023 09:14AM UTC