I'm also currently interested in seeing if I can load custom rootCA.pem certificates for the browser so I can load more pages with the outdated browser.
There's instructions on how to dump the rootCA.pem file here:
https://gbatemp.net/threads/tutorial-add-custom-root-certs-to-the-wii-us-browser.468201/
The user mentions getting Fiddler's rand the DST Root CA X3 root certs, and then add them to the rootCA.pem file in order to be able to visit sites that prompt the SSL window each time, and possibly allow entry to pages that throw the 1035 error. Romhacking.net is one of those that has recently been giving me such error.
The folder structure for the PEM file is inside
/storage_mlc/sys/title/00050030/1001210a/content/browser/rootCA.pem, but I wanted to ask, is it possible to load this file through SDcafiine?
And if so, what folder structure should it follow? Seems like the folder structure is separated into two, 00050030 for the upper part of the ID and 1001210a for the lower part, but I'm not sure if I can just put them together as the title ID for the SDcafiine structure, or if I should separate them or what.
I want to do this because I expect doing multiple changes to the PEM file in order to add more and more certs to it for testing.