consulting question.... (DRM)

[John Ioannidis]

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

---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo at metzdowd.com