Diffie-Hellman Key Exchange...

I've been working on building an SSH client, focussing on only supporting SSH 2.0, and ignoring all unneeded features and backwards-compatability options so this will fundamentally be a Java ME MIDP 2.0/CIDP 1.1 SSH 2.0-only client; no port forwarding, no X11 forwarding, no strange keyboard or terminal mappings just multiple shells on Linux servers running recent distro's.

Anyways, I've gotten to the Diffie-Hellman Key Exchange part, and I hunted for hours to find a good implementation of the math that didn't gobble up scads of memory and run way too slow for use in Java on my BlackBerry. It was a deep-recursive function, that buried itself as many layers deep as the numbers it was working with were wide.

But... there was a saving grace here, I unwound the function-calls, and verified that it was actually a linear test. It just had to start at the MSB of one operand, and run down the line to the LSB performing a core loop with one optional branch. Huzzah, bit-wise operands can convert this to a loop!

Well... I built and tested the recursive function against this new version, woo, it worked. Then I realized this may be a bit of code that others would find useful. So... posting it here for now in case anyone else needs/wants it. It's fully C99-compliant, and I'll update this post when I make a Java version, since the built-in function for this isn't available in Java ME as far as I can find.

( C99 code inside, math-heavy. )

XM/Sirius, your days are numbered.

Just got Pandora working in my car, via a $15 adapter-cable (hoo-ee 2.5mm to 3.5mm stuff is hard to find!) from Best Buy.

It's like satellite radio, except I can say 'Fuck that!' and just skip a song, instead of having to change the whole station. And no ads, ever. =^.^=