[144499] in cryptography@c2.net mail archive
Re: consulting question.... (DRM)
daemon@ATHENA.MIT.EDU (John Ioannidis)
Sat May 30 09:57:02 2009
Date: Sat, 30 May 2009 00:43:39 -0400
From: John Ioannidis <ji@tla.org>
To: John Gilmore <gnu@toad.com>
CC: Ray Dillinger <bear@sonic.net>, cryptography@metzdowd.com
In-Reply-To: <200905280603.n4S63hMO007021@new.toad.com>
John Gilmore wrote:
...
>
> PPS: On a consulting job one time, I helped my customer patch out the
> license check for some expensive Unix circuit simulation software they
> were running. They had bought a faster, newer machine and wanted to
> run it there instead of on the machine they'd bought the "node-locked"
> license for. The faster their simulation ran, the easier my job was.
> Actually, I think we patched the Unix kernel or C library that the
> program depended upon, rather than patch the program; it was easier.
>
Kernel. Instead of calling the subroutine that would retrieve the 32-bit
hostid from the PROM, you just did a load immediate with the right
number. The instructions were the same length, so everything worked fine :)
Not that I know of any places that actually did this, of course :)
/ji
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