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On 05/20/2014 04:03 AM, Henri Sivonen wrote:

> On Thu, May 15, 2014 at 8:39 PM, Majken Connor <maj...@gmail.com>
> wrote:
> 
>> A guide similar to the CEO FAQ would be great, as well as having
>> people reach out on the Reps-General list to discuss how to talk
>> about this and answer questions (not just about information on the
>> topic) would be really helpful.
> 
> The FAQ is out now, appended to the Hacks post:
> https://hacks.mozilla.org/2014/05/reconciling-mozillas-mission-and-w3c-eme/

One part of this FAQ states:

> Mozilla will develop the CDM host and is planning on making its code
> open source as is the norm for Mozilla-developed code. However, the
> CDM will refuse to work if it finds itself in a host that isn’t
> identical to the Mozilla-shipped CDM host executable.

How will the CDM be able to tell?

If it is properly sandboxed, it should not be able to find out anything
about the sandbox (== the host executable) except what the sandbox
itself tells it, unless there are channels for it to access the host
system which bypass the sandbox.

If the CDM's only source for information about the sandbox is what the
sandbox tells it, then it should be possible to modify the sandbox to
always report what the CDM would expect to find from a "valid" sandbox,
regardless of what other changes may in fact have been made.

If the CDM has other sources for information about the sandbox, then the
CDM is not properly contained within the sandbox.

- --
   The Wanderer

Secrecy is the beginning of tyranny.

A government exists to serve its citizens, not to control them.
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