Stevie-O

Also X25519 for ECDH-ES (RFC-8037)

Another reason for someone to want to manually run a backup: testing changes the firmware backup logic that's automatically run just before replacing the stock firmware.

Okay, so I want to be looking at the .a51 files. What was used to produce these? I noticed there's a _lot_ of differences between the fw_iso.a51 and fw_ansi.a51 files,...

My concrete goals are: 1. Understand how the current firmware does what it does 2. Understand how closely the current firmware approaches the limits of the SH68F83 (and, thus, learn...

@akirakyle Hah, I saw AKIR and thought of the crazy anime movie with the psychic kid. Yesterday I spent a few hours analyzing the assembly code in fw_ansi.a51 and annotating...

@akirakyle To be fair, I'm not sure how much I'd have trusted your C translations anyway :) The code is extremely convoluted in many places, and it'd be easy to...

@akirakyle HAH! I think I've found it! (Not 100% sure, read further) (unrelated note: check out the code at 0x3C7B) ``` L0556: 3DAE 7D00 MOV R5, #0h 3DB0 7C01 MOV...

@jackhumbert @akirakyle Okay, so if my understanding so far is correct, I have an explanation for this weirdness: ``` // HACK: overwrite first byte (as in original sources) unsigned char...

> @Stevie-O > > > (unrelated note: check out the code at 0x3C7B) > > Well you found me out :) Either the person who wrote this was also named...

@akirakyle > > What I've been thinking about is a way to put some code into the main firmware that, early on, checks for a certain combination of keys to...