Hi Stephan,
Thank you. Initially I was thinking this is the approach. However I was confused on drbg instance state.
This worked well. Thank you very much once again.
Regards,
Jayalakshmi
-----Original Message-----
From: Stephan Mueller <smueller@xxxxxxxxxx>
Sent: Friday, August 14, 2020 10:13 PM
To: linux-crypto@xxxxxxxxxxxxxxx; Bhat, Jayalakshmi Manjunath <jayalakshmi.bhat@xxxxxx>
Subject: Re: Information required on how to provide reseed input to DRBG
Am Donnerstag, 13. August 2020, 17:56:49 CEST schrieb Bhat, Jayalakshmi
Manjunath:
Hi Jayalakshmi,
> Hi Stephen,
>
> Thanks you very much on the response. I actually went through the code
> that you mentioned. My question is on inputting reseed. Example input
> I have is something like this
>
> "entropyInput" :
> "F929692DF52BC06878F67A4DBC76471C03981B987FF09BF7E29C18AD6F7F8397", "nonce"
> : "8DB5A7ECEC06078C1C41D2C80AB6CB5EDFE00EA7B1AA6F4F907E80C9BAA008CE",
> "persoString" : "C99B39DD7B8FB0F772",
> "otherInput" :
> {
> "intendedUse" : "reSeed",
> "additionalInput" :
> "32ED729CD8FCC001B6B2703F0DBE04D5EED127A615212FEC967566ABBFBC8913027D
> ", "entropyInput" :
> "6FE46781AF69B38550A4D2C3888C8E515D28A2A4F141A041F3E2E9A753E46A30" },
> {
> "intendedUse" : "generate",
> "additionalInput" :
> "3C758EC9ECFD905E5865FD8343556815FBD8A064846252CBC161BFEAAC4FA9AF4D0DB
> 8D8B9 FD2E06B2C7A3FD55", "entropyInput" : ""
> },
> {
> "intendedUse" : "generate",
> "additionalInput" :
> "8F8F3F52D2CEF7FA788E984DA152ECA82CF0493E37985E387B3CFCEC2639F610431CA
> 0A81F 740C4CD65230DD291733", "entropyInput" : ""
> }
Here is my code for that:
drbg_string_fill(&testentropy, entropyreseed->data,
entropyreseed->len);
drbg_string_fill(&addtl, addtlreseed->data, addtlreseed->len); ret = crypto_drbg_reset_test(drng, &addtl, &test_data);
>
> I understood
> how to use " entropyInput", " nonce" and " persoString".
> how to use " additionalInput" and " entropyInput" from generate section.
> My question is how to I use " additionalInput" and " entropyInput"
> from reSeed section.
>
> I could see only below APIs available to set the values.
> crypto_drbg_get_bytes_addtl_test { crypto_rng_set_entropy,
> crypto_rng_generate) crypto_drbg_reset_test {crypto_rng_set_entropy,
> crypto_rng_reset} crypto_drbg_get_bytes_addtl { crypto_rng_generate)
>
> I am not seeing any API to input reseed values or to trigger reseed?
>
> Regards,
> Jaya
>
>
> -----Original Message-----
> From: linux-crypto-owner@xxxxxxxxxxxxxxx
> <linux-crypto-owner@xxxxxxxxxxxxxxx> On Behalf Of Stephan Mueller Sent:
> Thursday, August 13, 2020 8:48 PM
> To: linux-crypto@xxxxxxxxxxxxxxx; Bhat, Jayalakshmi Manjunath
> <jayalakshmi.bhat@xxxxxx> Subject: Re: Information required on how to
> provide reseed input to DRBG
>
> Am Donnerstag, 13. August 2020, 11:01:27 CEST schrieb Bhat,
> Jayalakshmi
> Manjunath:
>
> Hi Jayalakshmi,
>
> > Hi All,
> >
> > I could successfully execute the CAVS test for DRBG with
> > ""predResistanceEnabled" : true" reseedImplemented": false.
> >
> > I am trying to execute the tests with "predResistanceEnabled" :
> > false; "reseedImplemented" : true. But not successful.
> >
> > Can anyone please let me know how to provide reseed data to DRBG?
>
> See, for example, how drbg_nopr_sha256_tv_template is processed with
> drbg_cavs_test()
>
> > Regards.
> > Jayalakshmi
>
> Ciao
> Stephan
Ciao
Stephan
