[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH v3 07/10] qemu-nbd: add support for ACLs for TLS

From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH v3 07/10] qemu-nbd: add support for ACLs for TLS clients
Date: Tue, 22 Mar 2016 12:14:27 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 03/10/2016 11:59 AM, Daniel P. Berrange wrote:
> Currently any client which can complete the TLS handshake
> is able to use the NBD server. The server admin can turn
> on the 'verify-peer' option for the x509 creds to require
> the client to provide a x509 certificate. This means the
> client will have to acquire a certificate from the CA before
> they are permitted to use the NBD server. This is still a
> fairly weak bar.
> This adds a '--tls-acl ACL-ID' option to the qemu-nbd command
> which takes the ID of a previously added 'QAuthZ' object
> instance. This ACL will be used to validate the client's
> x509 distinguished name. Clients failing the ACL will not be
> permitted to use the NBD server.
> For example to setup an ACL that only allows connection from
> a client whose x509 certificate distinguished name contains
> 'CN=fred', you would use:
>   qemu-nbd -object tls-creds-x509,id=tls0,dir=/home/berrange/qemutls,\
>                    endpoint=server,verify-peer=yes \
>            -object authz-simple,id=acl0,policy=deny,\
>                  rules.0.match=*CN=fred,rules.0.policy=allow \
>            -tls-creds tls0 \
>            -tls-acl acl0
>          ....other qemu-nbd args...

Ah, so you are arguing that this is feature-completion of work started
in 2.6, continuing work started before soft-freeze, and not a new
feature to be delayed to 2.7.

> Signed-off-by: Daniel P. Berrange <address@hidden>
> ---
>  qemu-nbd.c    | 13 ++++++++++++-
>  qemu-nbd.texi |  4 ++++
>  2 files changed, 16 insertions(+), 1 deletion(-)

> +++ b/qemu-nbd.texi
> @@ -86,6 +86,10 @@ the new style NBD protocol negotiation
>  Enable mandatory TLS encryption for the server by setting the ID
>  of the TLS credentials object previously created with the --object
>  option.
> address@hidden --tls-acl=ID
> +Specify the ID of a qauthz object previously created with the
> +--object option. This will be used to authorize users who
> +connect against their x509 distinguish name.


Reviewed-by: Eric Blake <address@hidden>

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

Attachment: signature.asc
Description: OpenPGP digital signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]