Attempt to login with XmlHttpRequest fails over HTTPS

I'm attempting to create a Chrome extension that connects to my web server over secured connection to enable user authentication.

My web server implements Spring Security solution and I was able to access my services when the security filter was turned off (http://1.2.3.4:8080/path/to/api)

When I try to access the login via https://1.2.3.4:8443/path/to/auth the XHR receives status code 0 for async requests and 'Error: INVALID_STATE_ERR: DOM Exception 11' immediately after calling xhr.open('POST', url, false); (which is a sync call) method.

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = checkResponse;
xhr.onerror = handleError;
xhr.open('POST', loginUrl, true); // tried async and sync
xhr.withCredentials = 'true'; // tried with and without
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send(loginContent);

My manifest file requests permission for both http://*/* and https://*/* (I even tried setting it to <all_urls>).

What am I doing wrong and if such login attempt sounds possible?

Edit / Addition

I tested a login attempt to the https url with Poster plug in for FireFox and managed to authenticate myself from the same computer the Chrome attempt was made - so the server and the auth path are reachable outside Chrome extension.

Another Edit / Addition When changing the authentication to HTTP instead of HTTPS I was able to authenticate myself via 开发者_JAVA百科the extension. Seems like HTTPS requests are blocked even that I requested for the required permissions.