[vdr] Child protection, again

[hm@seneca.muc.de]

While we're at discussing categories, I would still like to be able to
have some kind of child protection, and if we could tie it to categories
that would be pretty neat. Unfortunately, I am not a C++ programmer so I
can't be of much help, programming-wise. Implementation-wise, I think the
idea of having a USB memory key with an access key on it would be easiest,
and a configuration file which ties categories to one or more access keys.

Since children can be very "inventive", a stronger idea would be to have
a per-film or per-category MD5 hash, made of the film's or category's
name and a PIN. That would require a function "protect recording" or
"protect category", then enter a 4-digit PIN, and the function generates
an MD5 hash over the name and the PIN. The hash is stored in the said
config file, and on the USB stick if requested. VDR could memorize the
user's keys as long as the stick is inserted, and forget everything as
soon as it is removed. The stick could hold all the user's keys so that
she or he is authenticated with a single PIN once the stick is inserted.

The config file should also point to the correct USB device because
this might depend on the hardware config. In many cases, this would be
/dev/sda1, but not always.

If I could only speak C++... Can someone point me at what I need to know to
expand VDR? 

-- 
Concept, n.:
	Any "idea" for which an outside consultant billed you more than
$25,000.


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