On Sun, Apr 19, 2015 at 05:37:21PM +0200, Stephan Mueller wrote:
>
> I am not sure I understand you correctly: shall the DRBG have these
> precautions? If so, wouldn't we break the requirements in SP800-90A where the
> DRBG is intended to seed itself?
>
> Or would you want to update the crypto_alloc_rng routine?
No. Our API doesn't provide the Instantiate_function obviously.
If you really want to have an explicit instantiate function then
you can provide a wrapper:
crypto_instantiate_drbg(...)
{
struct crypto_rng *drbg;
drbg = crypto_alloc_rng(...);
crypto_rng_reset(drbg, ...);
return drbg;
}
The fact that crypto_alloc_rng currently instantiates the RNG
is wrong because there is no provision for the personalisation
string.
Cheers,
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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