From 5242f26ab29c7787a6071d10bf613e6b283512ef Mon Sep 17 00:00:00 2001
From: Petr Lautrbach <plautrba@redhat.com>
Date: Mon, 24 Feb 2020 19:04:25 +0100
Subject: [PATCH] Export setroubleshoot.utils.get_rpm_nvr_by_scontext via DBUS

$ dbus-send --system --print-reply --dest=org.fedoraproject.SetroubleshootPrivileged \
  /org/fedoraproject/SetroubleshootPrivileged/object \
  org.fedoraproject.SetroubleshootPrivileged.get_rpm_nvr_by_scontext \
  string:"system_u:system_r:mysqld_log_t:s0"

org.fedoraproject.SetroubleshootPrivileged is available only for
`setroubleshoot` user and it's supposed to be a privileged helper which is used
by `setroubleshootd`
---
 framework/Makefile.am                         |  7 ++-
 ...edoraproject.SetroubleshootPrivileged.conf | 20 +++++++
 ...raproject.SetroubleshootPrivileged.service |  4 ++
 framework/src/Makefile.am                     |  3 +-
 framework/src/SetroubleshootPrivileged.py     | 57 +++++++++++++++++++
 5 files changed, 88 insertions(+), 3 deletions(-)
 create mode 100644 framework/org.fedoraproject.SetroubleshootPrivileged.conf
 create mode 100644 framework/org.fedoraproject.SetroubleshootPrivileged.service
 create mode 100644 framework/src/SetroubleshootPrivileged.py

diff --git a/framework/Makefile.am b/framework/Makefile.am
index 56a8b37fa037..f330b7c3e112 100644
--- a/framework/Makefile.am
+++ b/framework/Makefile.am
@@ -14,12 +14,15 @@ dbus_session_DATA = sealert.service
 dbus_systemservicedir = $(datadir)/dbus-1/system-services
 dbus_systemservice_DATA = \
 			org.fedoraproject.Setroubleshootd.service \
-			org.fedoraproject.SetroubleshootFixit.service 
+			org.fedoraproject.SetroubleshootFixit.service \
+			org.fedoraproject.SetroubleshootPrivileged.service
 
 dbus_systemdir = $(sysconfdir)/dbus-1/system.d
 dbus_system_DATA = \
 			org.fedoraproject.Setroubleshootd.conf \
-			org.fedoraproject.SetroubleshootFixit.conf
+			org.fedoraproject.SetroubleshootFixit.conf \
+			org.fedoraproject.SetroubleshootPrivileged.conf
+
 
 polkit_systemdir = $(datadir)/polkit-1/actions
 polkit_system_DATA = \
diff --git a/framework/org.fedoraproject.SetroubleshootPrivileged.conf b/framework/org.fedoraproject.SetroubleshootPrivileged.conf
new file mode 100644
index 000000000000..aaa0a0f661d3
--- /dev/null
+++ b/framework/org.fedoraproject.SetroubleshootPrivileged.conf
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?> <!-- -*- XML -*- -->
+
+<!DOCTYPE busconfig PUBLIC
+ "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+
+  <!-- Only root can own the service -->
+  <policy user="root">
+    <allow own="org.fedoraproject.SetroubleshootPrivileged"/>
+  </policy>
+
+  <policy user="setroubleshoot">
+    <allow send_destination="org.fedoraproject.SetroubleshootPrivileged"
+	   send_interface="org.fedoraproject.SetroubleshootPrivileged"/>
+    <allow send_destination="org.fedoraproject.SetroubleshootPrivileged"
+		send_interface="org.freedesktop.DBus.Introspectable"/>
+  </policy>
+
+</busconfig>
diff --git a/framework/org.fedoraproject.SetroubleshootPrivileged.service b/framework/org.fedoraproject.SetroubleshootPrivileged.service
new file mode 100644
index 000000000000..7a454589a31d
--- /dev/null
+++ b/framework/org.fedoraproject.SetroubleshootPrivileged.service
@@ -0,0 +1,4 @@
+[D-BUS Service]
+Name=org.fedoraproject.SetroubleshootPrivileged
+Exec=/usr/share/setroubleshoot/SetroubleshootPrivileged.py
+User=root
diff --git a/framework/src/Makefile.am b/framework/src/Makefile.am
index e1782d585e8d..bf53763b3084 100644
--- a/framework/src/Makefile.am
+++ b/framework/src/Makefile.am
@@ -38,7 +38,8 @@ pkglibexec_SCRIPTS =            	\
 pkgdir = $(datarootdir)/setroubleshoot
 pkg_SCRIPTS =			\
 	SetroubleshootFixit.py		\
-	updater.py
+	updater.py \
+	SetroubleshootPrivileged.py
 
 pkgconfig_DATA =			\
 	setroubleshoot.conf		\
diff --git a/framework/src/SetroubleshootPrivileged.py b/framework/src/SetroubleshootPrivileged.py
new file mode 100644
index 000000000000..858115bbe5ae
--- /dev/null
+++ b/framework/src/SetroubleshootPrivileged.py
@@ -0,0 +1,57 @@
+#!/usr/bin/python3
+
+# Authors: Petr Lautrbach <plautrba@redhat.com>
+#
+# Copyright (C) 2020 Red Hat, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import dbus
+import dbus.service
+from dbus.mainloop.glib import DBusGMainLoop
+from gi.repository import GLib
+import setroubleshoot.util
+import signal
+
+DBusGMainLoop(set_as_default=True)
+
+class Privileged(dbus.service.Object):
+
+    def __init__(self, timeout=10):
+        self.timeout = timeout
+        self.alarm(self.timeout)
+
+        bus = dbus.SystemBus()
+        bus.request_name("org.fedoraproject.SetroubleshootPrivileged")
+        bus_name = dbus.service.BusName("org.fedoraproject.SetroubleshootPrivileged", bus=bus)
+        dbus.service.Object.__init__(self, bus_name, "/org/fedoraproject/SetroubleshootPrivileged/object")
+
+    def alarm(self, timeout=10):
+        signal.alarm(timeout)
+
+    @dbus.service.method("org.fedoraproject.SetroubleshootPrivileged", in_signature='s', out_signature='s')
+    def get_rpm_nvr_by_scontext(self, scontext):
+        signal.alarm(self.timeout)
+        rpmnvr = setroubleshoot.util.get_rpm_nvr_by_scontext(scontext)
+        if rpmnvr is None:
+            return ""
+
+        return rpmnvr
+
+if __name__ == "__main__":
+    privileged = Privileged()
+
+    loop = GLib.MainLoop()
+    loop.run()
-- 
2.25.1