topic Re: Using QorIQ family processor Security Engine 4.2 as entropy source in P-Series

Using QorIQ family processor Security Engine 4.2 as entropy source

mofassirhaque — Thu, 28 Jul 2016 02:53:59 GMT

I want to improve entropy by using the output of TRNG i.e. hardware generated entropy. I have pointed the "rng_current" to "rng-caam". I am running "rngd" with r option i.e. "rngd -r /dev/hwrng". Trace program i.e. "strace rngd -r /dev/hwrng" confirms that it is reading/getting 8 bytes.

However, I want to confirm that whether I am getting entropy output from SEC 4.2 RNG (which is available across RNG Test Output FIFO register) or output is coming from SEC 4.2 TRNG (which is available across XKEY register) ?

Any help/reply is appreciated please.

Thanks & Regards,

Re: Using QorIQ family processor Security Engine 4.2 as entropy source

bpe — Fri, 29 Jul 2016 10:21:21 GMT

Visit the link below, study Verifying driver operation and correctness section:

https://freescale.sdlproducts.com/LiveContent/content/en-US/QorIQ_SDK/GUID-70AB1917-E7BD-45DB-924C-7545993E6F7E

Have a great day,
Platon

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Re: Using QorIQ family processor Security Engine 4.2 as entropy source

mofassirhaque — Sun, 31 Jul 2016 21:49:50 GMT

Hi @Platon,

Thanks for the link. This is exactly what I was looking for.

Thanks & Regards,