Re: [PATCH 2/2] ath9k: disable RNG by default

Am Mittwoch, 10. August 2016, 02:35:04 CEST schrieb Pan, Miaoqing:

Hi Miaoqing,

Hi Stephan,

For those less perfect noise source, can't pass the FIPS test.

static int update_kernel_random(int random_step,
        unsigned char *buf, fips_ctx_t *fipsctx_in)
{
        unsigned char *p;
        int fips;

        fips = fips_run_rng_test(fipsctx_in, buf);
        if (fips)
                return 1;

        for (p = buf; p + random_step <= &buf[FIPS_RNG_BUFFER_SIZE];
                 p += random_step) {
                random_add_entropy(p, random_step);
                random_sleep();
        }
        return 0;
}

Not even the poor cheap AIS20 statistical tests from rngd pass?

I guess the only sensible solution is what Ted suggested to use 
add_device_randomness.

Ciao
Stephan
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