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https://issues.apache.org/jira/browse/OFBIZ-10307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16569409#comment-16569409
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Jacques Le Roux commented on OFBIZ-10307:
-----------------------------------------
Of course, if it can help reviewing ;) I'll
> Navigate from a domain to another with automated signed in authentication
> -------------------------------------------------------------------------
>
> Key: OFBIZ-10307
> URL: https://issues.apache.org/jira/browse/OFBIZ-10307
> Project: OFBiz
> Issue Type: New Feature
> Components: framework
> Affects Versions: Trunk
> Reporter: Jacques Le Roux
> Assignee: Jacques Le Roux
> Priority: Major
> Fix For: Upcoming Branch
>
> Attachments: OFBIZ-10307-test from example.patch,
> OFBIZ-10307-test.patch, OFBIZ-10307-test.patch, OFBIZ-10307.patch,
> OFBIZ-10307.patch, OFBIZ-10307.patch
>
>
> This will use a JWT Token authentication to get from one domain, where you
> are signed in, to another domain where you get signed in automatically.
> Something like ExternalLoginKey or Tomcat SSO, but not on the same domain.
> This will build upon the initial work done at OFBIZ-9833 which has been
> partially reverted in trunk with r1827439 (see OFBIZ-10304) and r1827441. I
> explained why and what I did at [https://s.apache.org/a5Km]
> I turned to Ajax for the "Authorization" header sending. I initially thought
> I'd just pass an "Authorization" header and use it in the
> externalServerLoginCheck preprocessor, et voilà.
> But I stumbled upon something I did not know well : CORS! And in particular
> the upstream control (Pre-verified requests):
>
> [https://en.wikipedia.org/wiki/Cross-origin_resource_sharing#Preflight_example]
> [https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS]
> [https://www.w3.org/TR/cors/]
> To be able to pass an "Authorization" header, the server must respond
> positively in the Preflight HTTP response (OPTIONS). To do this, either you
> use a Tomcat filter (or your own filter, there are examples on the Net) or
> use HTTPD (or Nginx) configuration on the target server.
> I tried Tomcat first, without success. With HTTPD it's easier just 3 lines.
> For my tests, future tests by OFBiz users and as an example, I asked infra to
> put them in our HTTPD trunk demo config:
> Header set Access-Control-Allow-Origin "https://localhost:8443";
> Header set Access-Control-Allow-Headers "Authorization"
> Header set Access-Control-Allow-Credentials "true"
> No code change (either in all web.xml files for Tomcat or Java for own
> filter), and more safety. It does not give more right to outsiders than what
> we give with the admin credential.
> In Header set Access-Control-Allow-Origin you can put more domains. I just
> used [https://localhost:8443|https://localhost:8443/] for the tests.
> It works in Chrome, Firefox and Opera and partially in IE11 (not tested in
> Edge). I did not test Safari, but I guess like other modern browsers it
> should work.
> For those (very few I guess) interested by IE11 (for Edge test yourself and
> report please), here is the solution
>
> [https://stackoverflow.com/questions/12643960/internet-explorer-10-is-ignoring-xmlhttprequest-xhr-withcredentials-true]
>
> [https://web.archive.org/web/20130308142134/http://msdn.microsoft.com/en-us/library/ms537343%28v=vs.85%29.aspx]
>
> [https://blogs.msdn.microsoft.com/ieinternals/2013/09/17/a-quick-look-at-p3p/]
> TODO (maybe) in the future, use the new Fetch API (not available yet):
> [https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API]
> ----
> Here is a complement about the way it's architectured:
> # A change to cookies was introduced with OFBIZ-4959. Actually it was not
> really a bug rather a clean-up. The autoLogin cookies were only used by the
> ecommerce component and maybe webpos. But all applications were creating such
> cookies with a one year duration. They were useless until I needed them for
> the feature of this Jira issue. But even if they were safe (httponly) then I
> needed them to be clean, not a one year duration (to be as safe as possible,
> temporary cookies are better). So after doing it crudely, [inspired by
> Taher's suggestion|[https://s.apache.org/qLGC]] I introduced the
> keep-autologin-cookie <webapp> attribute in ofbiz-component.xml. It's used to
> remove not kept cookies when login in or out. So those cookies are only kept
> during a session. Also a cookie is created when an user jumps from one
> application to another on the source domain. These cookies are used when
> navigating from a domain to another to guarantee the safety of the user who
> jumps from the source domain to the target domain. Note that protected
> cookies (httponly) are one of the safer ways to store information, [js script
> can't use
> them|[https://stormpath.com/blog/where-to-store-your-jwts-cookies-vs-html5-web-storage]].
> # To jump from a domain to another I use Ajax to send a JWT token in a HTTP
> header (as recommended by CORS standard). The JWT token contains only the
> userLoginId information.
> # For authentication, I use the checkExternalServerLogin pre-processor in
> the same vein than checkExternalLoginKey. It checks a JWT token is present in
> the HTTP header of the request and if present uses the userLoginId to sign in
> the user on the target domain. I must say that the devil is in the technical
> details (of CORS) and I'll not explain that here.
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