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<blockquote data-quote="asgalor" data-source="post: 8029336" data-attributes="member: 450849"><p>But for a server to validate the keys, the switch first has to connect to the server. Afaik this doesn't happen during the boot sequence. So all certificates, keys or, if you will, (local) certificate servers are under our control.</p><p>So basically you could completely implement your own crypto infrastructure complete with rootkey, intermediate and endpoint certificates, chain of trust, etc...</p><p></p><p>This would obviously not work as soon as you tried to contact Nintendos server exactly because of the reasons you just wrote, but only for the boot process or maybe only until the CFW is loaded and starts to load the original firmware, you would be in complete control of all keys and certificates.</p><p>As soon as you require access to Nintendos servers, code signed by them or similar things, you would fall back to the original certificates which are signed by Nintendo.</p><p></p><p>This approach would just simplyfy the boot procedure and would, possibly, allow to coldboot CFW, which then loads the original firmware, if, and only if, we have write access to all the places on the console where certificates, keys etc... are stored.</p><p></p><p>So my question was, if we have access to all the necessary places on the switch and if yes, what other problems would be there that would prohibit this approach.</p><p></p><p>Again: In this scenario we would be in control of all locations on the console where certs/keys are stored and, in return, of every asymmetrical signing, validating, en- and decrypting step in (and only in) the boot chain.</p></blockquote><p></p>
[QUOTE="asgalor, post: 8029336, member: 450849"] But for a server to validate the keys, the switch first has to connect to the server. Afaik this doesn't happen during the boot sequence. So all certificates, keys or, if you will, (local) certificate servers are under our control. So basically you could completely implement your own crypto infrastructure complete with rootkey, intermediate and endpoint certificates, chain of trust, etc... This would obviously not work as soon as you tried to contact Nintendos server exactly because of the reasons you just wrote, but only for the boot process or maybe only until the CFW is loaded and starts to load the original firmware, you would be in complete control of all keys and certificates. As soon as you require access to Nintendos servers, code signed by them or similar things, you would fall back to the original certificates which are signed by Nintendo. This approach would just simplyfy the boot procedure and would, possibly, allow to coldboot CFW, which then loads the original firmware, if, and only if, we have write access to all the places on the console where certificates, keys etc... are stored. So my question was, if we have access to all the necessary places on the switch and if yes, what other problems would be there that would prohibit this approach. Again: In this scenario we would be in control of all locations on the console where certs/keys are stored and, in return, of every asymmetrical signing, validating, en- and decrypting step in (and only in) the boot chain. [/QUOTE]
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