BUG: Xephyr broken SECURITY extension

[Liraz]

Hi,

I think I found a bug in Xephyr's support for the X SECURITY extension.

I'm using an Ubuntu packaged version of Xephyr in the xserver-xephyr
package version 2:1.4.1~git20080131-1ubuntu9.

For those of you not using Debian this version is based on the following
upstream commit (from Jan 18): b6d4cdf64f43ae805beada6122c8be2ed138742c


For some reason the server does not allow cookies were generated by
xauth (regardless of whether the cookie is a trusted or untrusted type).

Reproducing the bug::

    # create auth
    rm -f /tmp/xauth
    xauth -f /tmp/xauth add :1 . $(mcookie)

    # run xephyr with auth
    Xephyr :1 -auth /tmp/xauth &

    # set Xephyr as X server
    DISPLAY=:1

    # test
    XAUTHORITY=/tmp/xauth xterm

    # now try to connect to the server with a "generated" X
    # authorization
    rm -f /tmp/xauth2

    # generate new authorization cookie into /tmp/xauth2
    XAUTHORITY=/tmp/xauth xauth -f /tmp/xauth2 generate $DISPLAY .

    # test X connection - it fails!
    XAUTHORITY=/tmp/xauth2 xterm

I tested the same sequence of commands with the regular X server and it
worked just fine.

Note that the problem seems to be shared by Xnest as well.

Cheers,
Liraz


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