linux-kernel - Re: Problem with RSA test from testmgr

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Message-ID: <1836837.jAzr4JNxJu@tauon.atsec.com>
Date:   Tue, 28 Feb 2017 17:08:35 +0100
From:   Stephan Müller <smueller@...onox.de>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     herbert@...dor.apana.org.au, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: Problem with RSA test from testmgr

Am Dienstag, 28. Februar 2017, 16:59:53 CET schrieb Corentin Labbe:

Hi Corentin,

> hello
> 
> I work on the sun8i-ce crypto accelerator and I have some problem with the
> RSA part.
> 
> The RSA register fail at the first RSA test (encrypt 512bit) with this
> output: [ 8480.146843] alg: akcipher: encrypt test failed. Invalid output
> [ 8480.146871] 00000000: 6e 7c 8a 75 e7 30 80 d1 5e ab 9b db a2 cf ed db
> [ 8480.146897] 00000010: c9 b2 db 43 bd 9a b9 75 27 f3 73 d9 73 b7 81 8c
> [ 8480.146921] 00000020: 49 e8 45 fc 43 44 f5 6d f0 f7 b8 f2 ae 6b ae 49
> [ 8480.146946] 00000030: 1b 8e 50 c6 88 4e 99 09 78 14 f2 5d 99 c3 7f f9
> [ 8480.146995] alg: akcipher: test 1 failed for rsa-sun8i-ce, err=-22
> 
> But with the same parameters (msg, n, e) openssl give me exactly this
> output.
> 
> So what I miss for made it work ?
> In which format testmgr expect the output data ?

The output should be simply the binary string from the modular exponentiation 
operation.

What I am wondering is: the output logged above is not found in the expected 
values of testmgr.h. Which input data or test vectors do you use?

Ciao
Stephan