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Re: [libvirt] [PATCHv3 0/5] smartcard: round 3



On Tue, Jan 25, 2011 at 05:36:53PM -0700, Eric Blake wrote:
> This series has hopefully taken into account all the feedback from v2
> (https://www.redhat.com/archives/libvir-list/2011-January/msg00608.html).
> 
> Major changes:
>  - enhance the XML to support optional ccid <controller> (missing
> controllers are added according to <address> elements) and optional
> <address> per smartcard (missing address assume the next available
> port on controller 0)
>  - enhance the XML to support an optional <source dev='/path'/> for
> host mode. For now, this path is only used in SELinux labeling; I
> suspect that this needs more work, since the point is that a single
> device in the host should be shared among the NSS implementation of
> multiple guests (so labeling the host device to belong to a single
> guest is wrong); but fixing it correctly requires a better
> understanding of what NSS actually needs to access, as well as
> possibly modifying qemu's smartcard implementation to take the
> host device either as a pathname or even as an already-opened fd.

I just remembered how NSS actually talks to cards. So basically if
you are using a physical card it will go through a TCP connection to
a local daemon called pcscd - I'm guessing that means no SELinux
labeling would be required? Does SELinux label sockets?

pcscd is a single instance, so wouldn't pose a problem for SELinux.
It uses libccid which is linked to libusb which does the actual
device open, so just pcscd needs the permissions for device access.

>  - enhance the XML to support an optional <database> element for
> host-certificates mode.
>  - enhance the qemu command line to fully populate all parameters,
> rather than the bare minimum defaults, and reflect that in the tests.
> 
> It requires this pre-requisite patch for qemu -chardev aliases:
> https://www.redhat.com/archives/libvir-list/2011-January/msg01032.html
> 
> Eric Blake (5):
>   smartcard: add XML support for <smartcard> device
>   smartcard: add domain conf support
>   smartcard: check for qemu capability
>   smartcard: enable SELinux support
>   smartcard: turn on qemu support
> 
>  cfg.mk                                             |    1 +
>  docs/formatdomain.html.in                          |   95 +++++-
>  docs/schemas/domain.rng                            |   73 ++++
>  src/conf/domain_conf.c                             |  396 +++++++++++++++++++-
>  src/conf/domain_conf.h                             |   53 +++-
>  src/libvirt_private.syms                           |    4 +
>  src/qemu/qemu_capabilities.c                       |    2 +
>  src/qemu/qemu_capabilities.h                       |    1 +
>  src/qemu/qemu_command.c                            |   90 +++++-
>  src/security/security_selinux.c                    |   94 +++++
>  .../qemuxml2argv-smartcard-controller.args         |    1 +
>  .../qemuxml2argv-smartcard-controller.xml          |   20 +
>  .../qemuxml2argv-smartcard-host-certificates.args  |    1 +
>  .../qemuxml2argv-smartcard-host-certificates.xml   |   20 +
>  .../qemuxml2argv-smartcard-host.args               |    1 +
>  .../qemuxml2argv-smartcard-host.xml                |   16 +
>  .../qemuxml2argv-smartcard-passthrough-tcp.args    |    1 +
>  .../qemuxml2argv-smartcard-passthrough-tcp.xml     |   19 +
>  tests/qemuxml2argvtest.c                           |   13 +
>  19 files changed, 887 insertions(+), 14 deletions(-)
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-controller.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-controller.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-host.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-host.xml
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-tcp.args
>  create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-tcp.xml
> 
> -- 
> 1.7.3.5
> 


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