Re: [Qemu-devel] [PULL v3 02/13] crypto: add support for PBKDF2 algorithm

["Daniel P. Berrange" <berrange@redhat.com>]

On Thu, Mar 24, 2016 at 11:06:21AM +0800, Wen Congyang wrote:
> On 03/18/2016 12:53 AM, Daniel P. Berrange wrote:
> > The LUKS data format includes use of PBKDF2 (Password-Based
> > Key Derivation Function). The Nettle library can provide
> > an implementation of this, but we don't want code directly
> > depending on a specific crypto library backend. Introduce
> > a new include/crypto/pbkdf.h header which defines a QEMU
> > API for invoking PBKDK2. The initial implementations are
> > backed by nettle & gcrypt, which are commonly available
> > with distros shipping GNUTLS.
> > 
> > The test suite data is taken from the cryptsetup codebase
> > under the LGPLv2.1+ license. This merely aims to verify
> > that whatever backend we provide for this function in QEMU
> > will comply with the spec.
> > 
> > Reviewed-by: Fam Zheng <famz@redhat.com>
> > Reviewed-by: Eric Blake <eblake@redhat.com>
> > Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

> 
> I get the following building error:
> 
>   CC    crypto/pbkdf.o
>   CC    crypto/pbkdf-nettle.o
>   CC    crypto/ivgen.o
> crypto/pbkdf-nettle.c:23:27: error: nettle/pbkdf2.h: No such file or directory
> crypto/pbkdf-nettle.c: In function ‘qcrypto_pbkdf2’:
> crypto/pbkdf-nettle.c:46: warning: implicit declaration of function ‘pbkdf2_hmac_sha1’
> crypto/pbkdf-nettle.c:46: warning: nested extern declaration of ‘pbkdf2_hmac_sha1’
> crypto/pbkdf-nettle.c:53: warning: implicit declaration of function ‘pbkdf2_hmac_sha256’
> crypto/pbkdf-nettle.c:53: warning: nested extern declaration of ‘pbkdf2_hmac_sha256’
> make: *** [crypto/pbkdf-nettle.o] Error 1
> make: *** Waiting for unfinished jobs....
> 
> rpm -qf /usr/include/nettle/
> libnettle-devel-2.4-8.1.2
> 
> The nettle version is very old......
> The OS is SUSE 11 SP3.

Ok, I work on a patch to make this conditional on nettle version.


Regards,
Daniel
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