[openssl-users] Fips CTR_DRBG

Dr. Stephen Henson steve at openssl.org
Thu Feb 26 16:43:41 UTC 2015

On Thu, Feb 26, 2015, Piotr ??obacz wrote:

> Yes,
> i have read that RAND API will use CTR_DRBG by default but what if i
> want to have set seed and than calculate and have the same results on
> two different machines? As far as i understand if i set seed - which is
> calculated from entropy, nonce and personal string - if it is given i
> should get some deterministic value of returned buffer and RAND_bytes
> doesn't give me such result it is always different. Correct me if i am
> wrong.

OK, can you give some details of how you are instantiating the DRBG?

Dr Stephen N. Henson. OpenSSL project core developer.
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