Hi, How the clients will know: a) which interface is restricted and which is not ? b) that the compositor implements restricted interface ? should they be visible in the registry ?
If the client would like to use many restricted interfaces, it would have to issue multiple authorize requests - probably causing compositor to show many popups/notifications. I think it would be better to send list of interfaces and receive back a list of interfaces for which access was granted instead. Mariusz Ceier On 24 November 2015 at 16:16, Giulio Camuffo <giuliocamu...@gmail.com> wrote: > This new extension is used by clients wanting to execute priviledged > actions such as taking a screenshot. > The usual way of granting special priviledged to apps is to fork and > exec them in the compositor, and then checking if the client is the > known one when it binds the restricted global interface. This works > but is quite limited, as it doesn't allow the compositor to ask the > user if the app is trusted, because it can't wait for the answer in > the bind function as that would block the compositor. > This new protocol instead allows the answer to come after some time > without blocking the compositor or the client. > --- > > For reference, i've implemented this in orbital[0] and it's used by > the screenshooter tool[1]. The name is different but it works exaclty > the same as this one. > One thing missing is how the revoke authorization, if even want/need it? > > 0: > https://github.com/giucam/orbital/blob/master/src/compositor/authorizer.cpp > 1: > https://github.com/giucam/orbital/blob/master/src/screenshooter/main.cpp#L301 > > > Makefile.am | 1 + > unstable/authorizer/authorizer-unstable-v1.xml | 90 > ++++++++++++++++++++++++++ > 2 files changed, 91 insertions(+) > create mode 100644 unstable/authorizer/authorizer-unstable-v1.xml > > diff --git a/Makefile.am b/Makefile.am > index a32e977..bfe9a6a 100644 > --- a/Makefile.am > +++ b/Makefile.am > @@ -5,6 +5,7 @@ unstable_protocols = > \ > unstable/text-input/text-input-unstable-v1.xml > \ > unstable/input-method/input-method-unstable-v1.xml > \ > unstable/xdg-shell/xdg-shell-unstable-v5.xml > \ > + unstable/authorizer/authorizer-unstable-v1.xml > $(NULL) > > nobase_dist_pkgdata_DATA = > \ > diff --git a/unstable/authorizer/authorizer-unstable-v1.xml > b/unstable/authorizer/authorizer-unstable-v1.xml > new file mode 100644 > index 0000000..f10dd0e > --- /dev/null > +++ b/unstable/authorizer/authorizer-unstable-v1.xml > @@ -0,0 +1,90 @@ > +<?xml version="1.0" encoding="UTF-8"?> > +<protocol name="authorizer_unstable_v1"> > + > + <copyright> > + Copyright © 2015 Giulio Camuffo. > + > + Permission to use, copy, modify, distribute, and sell this > + software and its documentation for any purpose is hereby granted > + without fee, provided that the above copyright notice appear in > + all copies and that both that copyright notice and this permission > + notice appear in supporting documentation, and that the name of > + the copyright holders not be used in advertising or publicity > + pertaining to distribution of the software without specific, > + written prior permission. The copyright holders make no > + representations about the suitability of this software for any > + purpose. It is provided "as is" without express or implied > + warranty. > + > + THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS > + SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND > + FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY > + SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES > + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN > + AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, > + ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF > + THIS SOFTWARE. > + </copyright> > + > + <interface name="zwp_authorizer_v1" version="1"> > + <description summary="authorize clients to use certain interfaces"> > + This global interface allows clients to ask the compositor the > + authorization to bind certain restricted global interfaces. > + Any client that aims to bind restricted interfaces should first > + request the authorization by using this interface. Failing to do > + so will result in the compositor sending a protocol error to the > + client when it binds the restricted interface. > + > + The list of restricted interfaces is compositor dependant, but must > + not include the core interfaces defined in wayland.xml. However, if > + an authorization request is done for a non-restricted interface the > + compositor must reply with a grant. > + </description> > + > + <request name="destroy" type="destructor"> > + <description summary="destroy this zwp_authorizer_v1 object"> > + Any currently ongoing authorization request will outlive this > object. > + </description> > + </request> > + > + <request name="authorize"> > + <description summary="authorize a global interface"> > + The authorize request allows the client to ask the compositor the > + authorization to bind a restricted global interface. The newly > + created zwp_authorizer_feedback_v1 will be invalid after the > + compositor sends either the granted or denied event so the client > + is expected to destroy it immediately after. > + </description> > + <arg name="id" type="new_id" interface="zwp_authorizer_feedback_v1" > summary="the new feedback object"/> > + <arg name="global" type="string" summary="the global interface the > client wants to bind"/> > + </request> > + </interface> > + > + <interface name="zwp_authorizer_feedback_v1" version="1"> > + <description summary="feedback for an authorization request"> > + A zwp_authorizer_feedback_v1 object is created by requesting > + an authorization with the zwp_authorizer_v1.authorize request. > + The compositor will send either the granted or denied event based > + on the system and user configuration. How the authorization > process > + works is compositor specific, but a compositor is allowed to ask > + for user input, so the client must not assume the reply will come > + immediately. > + </description> > + > + <event name="granted"> > + <description summary="the authorization was granted"> > + The authorization was granted. The client can now bind the > restricted > + interface. > + </description> > + </event> > + > + <event name="denied"> > + <description summary="the authorization was denied"> > + The authorization was denied. The client is not allowed to bind > the > + restricted interface and trying to do so will trigger a protocol > + error killing the client. > + </description> > + </event> > + > + </interface> > +</protocol> > -- > 2.6.2 > > _______________________________________________ > wayland-devel mailing list > wayland-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/wayland-devel >
_______________________________________________ wayland-devel mailing list wayland-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/wayland-devel