Yup, Raptor Blackbird. I'd send along my notes if I didn't think they'd be more misleading than helpful. Left that one in a mess that'd be difficult to untangle, but I remember the trail basically ending in a file that was practically unchanged since the original source got released. Because of the code vintage I really wanted to be sure that I didn't introduce performance regressions, so that led to me turning my attention to live kernel debugging over serial, which led to uncovering an even more ancient tty bug (seriously, we're talking unix fountainhead old).
She swallowed the spider to catch the fly... I'm presently writing something to crack 8051 firmware xnor'd by a 64 byte key, I don't remember how - but the previously described ZFS edge case somehow got me to this point.
I cut a patch to fix sparc64 building with the new zstd feature. I then discovered the new zstd feature was broken for endian portability because lol bitfields.
She swallowed the spider to catch the fly... I'm presently writing something to crack 8051 firmware xnor'd by a 64 byte key, I don't remember how - but the previously described ZFS edge case somehow got me to this point.