Implementing CSRF token for the current window's location

Question

Implementing CSRF token for the current window's location

Is there a way to add a CSRF token to all instances where window.location.href is used in my Javascript code?

It's not possible to override the window.location object and its properties like window.location.href.

Creating a universal function to include the CSRF token in all instances would be time-consuming.

addCSRFAndProceed(url);
function addCSRFAndProceed (url) {
    window.location.href = url + getCSRFTokenAndValue();
}

Backend code Here is how the CSRF cookie is set from the backend.

$_COOKIE['CSRFTOKEN'] = '123456';

HTML code

<div class="redirect-button" onclick="TriggerRequest()">

Javascript code

function TriggerRequest() {
    window.location.href="www.mysite.com/?index.php&from=desktop";
}

I use various functions that utilize window.location.href and am seeking a generic solution for adding the CSRF token to the URL instead of manually updating each function separately.

javascript security csrf csrf-protection window.location

Answer 1

Answer №1

Speaking from a Laravel backend perspective, it's important to consider where the token originates.

<meta id="csrf" name="csrf-token" content="{{ csrf_token() }}">

By including this code, a CSRF token is generated within a meta tag with the id attribute set to "csrf".

To incorporate this token into a redirect function, you can modify the code like so:

addCSRFAndProceed(url);
function addCSRFAndProceed (url) {
    window.location.href = url + '?token=' + getCSRFTokenAndValue();
}

function getCSRFTokenAndValue() {
    return document.getElementById("csrf").getAttribute('content');
}

Additionally, ensure your backend includes logic to verify the query string parameter token for server-side validation before returning the requested page.

Here's a basic example of pseudo code (specifics depend on your backend):

if ($query_string_array['token'] == 'accepted token') {
    return view:page;
} else {
    return error: token does not match;
}

Answer 2

Speaking from a Laravel backend perspective, it's important to consider where the token originates.

<meta id="csrf" name="csrf-token" content="{{ csrf_token() }}">

By including this code, a CSRF token is generated within a meta tag with the id attribute set to "csrf".

To incorporate this token into a redirect function, you can modify the code like so:

addCSRFAndProceed(url);
function addCSRFAndProceed (url) {
    window.location.href = url + '?token=' + getCSRFTokenAndValue();
}

function getCSRFTokenAndValue() {
    return document.getElementById("csrf").getAttribute('content');
}

Additionally, ensure your backend includes logic to verify the query string parameter token for server-side validation before returning the requested page.

Here's a basic example of pseudo code (specifics depend on your backend):

if ($query_string_array['token'] == 'accepted token') {
    return view:page;
} else {
    return error: token does not match;
}

Implementing CSRF token for the current window's location

Answer №1

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