Re: hashing bit oriented messages

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Am Montag, 12. Februar 2018, 07:18:20 CET schrieb Jitendra Lulla:

Hi Jitendra,

> Hi,
> 
> the following NIST link has test vectors for SHA1/2/3.
> https://csrc.nist.gov/projects/cryptographic-algorithm-validation-program/se
> cure-hashing
> 
> They have test vectors for bit oriented messages also e.g. a message
> of 7 bits for example. [grep "Bit-Oriented" on the page, bottom of the
> page]
> 
> Some sw implementations do support computing SHA* on such messages
> which are not byte aligned.
> 
> e.g. libdigest-sha3-perl and  libdigest-sha-perl  (tried on Ubuntu)
> Some example runs at the bottom of this mail.
> 
> I have following queries, could anybody please help me with them:
> 
> 1. When would one want to compute digests on such messages eg. a 7 bit
> message or a 133 bit message? Any practical use case?

There are no use cases in the kernel that require non-byte aligned ciphers

> 2. testmgr.h doesnt have tests for such messages. Does linux kernel
> crypto framework support it or have plans for it?

No.

> 3. Does any fips certification mandate bit-oriented tests to pass ?

No.

Ciao
Stephan






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