DRBG seeding

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Hi Stephan:

Currently DRBG is seeded with entropy from get_random_bytes.
However, get_random_bytes is basically the kernel version of
/dev/urandom.  So there is no guarantee that you're actually
getting the amount of entropy required.

Are you sure this is compliant with the DRBG specification?

Cheers,
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Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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