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From:   "Bhat, Jayalakshmi Manjunath" <jayalakshmi.bhat@hp.com>
To:     "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>
Subject: How to use nonce in DRBG functions.
Thread-Topic: How to use nonce in DRBG functions.
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Date:   Sun, 1 Sep 2019 18:52:24 +0000
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Hi All,

I am trying to implement DRBG CAVS test harness function for Linux Kernel c=
rypto DRBG with the following requirements.
=091.=09Derivate function is enabled.
=092.=09prediction resistance is not enabled
=093.=09Entropy input length is 256
=094.=09Nonce length is 256
=095.=09Mode is AES-CTR 256=20
=096.=09Reseed is supported
=097.=09Intended use generate.

Thus inputs are
=091.=09Entropy Input
=092.=09Nonce
=093.=09Entropy Additional Input

Flow goes something like below
=09drbg_string_fill(&testentropy, test->entropy, test->entropylen);
=09drbg_string_fill(&pers, test->pers, test->perslen);
=09ret =3D crypto_drbg_reset_test(drng, &pers, &test_data);
=09drbg_string_fill(&addtl, test->addtla, test->addtllen);
=09ret =3D crypto_drbg_get_bytes_addtl(drng, buf, test->expectedlen, &addtl=
);
       =20
I am not finding a way to input nonce. Please can anyone tell me how to inp=
ut nonce.=20

Regards,
Jayalakshmi