Hi Andy,
Thanks for the reply. I am trying to understand whether FIPS 180-2 or FIPS
180-3 is supported in OpenSSL 1.0.1. CHANGES document in OpenSSL claims the
support for FIPS 180-2. However CH is defined in SHA-256 is #define Ch(x,y,z)
(((x) & (y)) ^ ((~(x)) & (z))) in SHA-256.c . This is as per FIPS 180-3
standard. As per FIPS 180-2 this should been #define Ch(x,y,z) (((x) &
(y)) ^ ((x) & (z)) . And if I am right this is only difference for SHA-256
implementation across FIPS 180-3 and FIPS 180-2 standard.
So I am confused about the standard implementation supported in OpenSSL 1.0.1.
Regards
Jaya
-----Original Message-----
From: owner-openssl-...@openssl.org [mailto:owner-openssl-...@openssl.org] On
Behalf Of Andy Polyakov
Sent: Tuesday, June 26, 2012 5:51 PM
To: openssl-dev@openssl.org
Subject: Re: SHA-256 and SHA-512 doubts in OpenSSL
> I have couple of questions like,
>
> 1. What is FIPS standard OpenSSL 1.0.1 library following. CHANGES claims
> the support for FIPS180-2?
What is the concern? That post-FIPS180-2 is not supported? Well, if you can
point out essential difference in specification for algorithms in question in
post-FIPS180-2, then the question would be relevant.
> 2. In Sha256.c, these are not as per the FIPS 180-2 standard or FTP 180-3.
> #define Sigma0(x) (ROTATE((x),30) ^ ROTATE((x),19) ^
> ROTATE((x),10))
> #define Sigma1(x) (ROTATE((x),26) ^ ROTATE((x),21) ^
> ROTATE((x),7))
> #define sigma0(x) (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3))
> #define sigma1(x) (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10))
There is comment just two lines above.
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