[PATCH] Do not use Python slip

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Python slip is not actively maintained anymore and it was used just as
a polkit proxy. It looks like polkit dbus interface is quite simple to
be used directly via python dbus module.

Signed-off-by: Petr Lautrbach <plautrba@xxxxxxxxxx>
---
 dbus/selinux_server.py             | 69 ++++++++++++++++++------------
 python/sepolicy/sepolicy/sedbus.py |  9 ----
 2 files changed, 41 insertions(+), 37 deletions(-)

diff --git a/dbus/selinux_server.py b/dbus/selinux_server.py
index be4f4557a9fa..b7c9378bcb5d 100644
--- a/dbus/selinux_server.py
+++ b/dbus/selinux_server.py
@@ -4,26 +4,33 @@ import dbus
 import dbus.service
 import dbus.mainloop.glib
 from gi.repository import GObject
-import slip.dbus.service
-from slip.dbus import polkit
 import os
 import selinux
 from subprocess import Popen, PIPE, STDOUT
 
 
-class selinux_server(slip.dbus.service.Object):
+class selinux_server(dbus.service.Object):
     default_polkit_auth_required = "org.selinux.semanage"
 
     def __init__(self, *p, **k):
         super(selinux_server, self).__init__(*p, **k)
 
+    def is_authorized(self, sender, action_id):
+        bus = dbus.SystemBus()
+        proxy = bus.get_object('org.freedesktop.PolicyKit1', '/org/freedesktop/PolicyKit1/Authority')
+        authority = dbus.Interface(proxy, dbus_interface='org.freedesktop.PolicyKit1.Authority')
+        subject = ('system-bus-name', {'name': sender})
+        result = authority.CheckAuthorization(subject, action_id, {}, 1, '')
+        return result[0]
+
     #
     # The semanage method runs a transaction on a series of semanage commands,
     # these commands can take the output of customized
     #
-    @slip.dbus.polkit.require_auth("org.selinux.semanage")
-    @dbus.service.method("org.selinux", in_signature='s')
-    def semanage(self, buf):
+    @dbus.service.method("org.selinux", in_signature='s', sender_keyword="sender")
+    def semanage(self, buf, sender):
+        if not self.is_authorized(sender, "org.selinux.semanage"):
+            raise dbus.exceptions.DBusException("Not authorized")
         p = Popen(["/usr/sbin/semanage", "import"], stdout=PIPE, stderr=PIPE, stdin=PIPE, universal_newlines=True)
         p.stdin.write(buf)
         output = p.communicate()
@@ -35,9 +42,10 @@ class selinux_server(slip.dbus.service.Object):
     # on the server.  This output can be used with the semanage method on
     # another server to make the two systems have duplicate policy.
     #
-    @slip.dbus.polkit.require_auth("org.selinux.customized")
-    @dbus.service.method("org.selinux", in_signature='', out_signature='s')
-    def customized(self):
+    @dbus.service.method("org.selinux", in_signature='', out_signature='s', sender_keyword="sender")
+    def customized(self, sender):
+        if not self.is_authorized(sender, "org.selinux.customized"):
+            raise dbus.exceptions.DBusException("Not authorized")
         p = Popen(["/usr/sbin/semanage", "export"], stdout=PIPE, stderr=PIPE, universal_newlines=True)
         buf = p.stdout.read()
         output = p.communicate()
@@ -49,9 +57,10 @@ class selinux_server(slip.dbus.service.Object):
     # The semodule_list method will return the output of semodule --list=full, using the customized polkit,
     # since this is a readonly behaviour
     #
-    @slip.dbus.polkit.require_auth("org.selinux.semodule_list")
-    @dbus.service.method("org.selinux", in_signature='', out_signature='s')
-    def semodule_list(self):
+    @dbus.service.method("org.selinux", in_signature='', out_signature='s', sender_keyword="sender")
+    def semodule_list(self, sender):
+        if not self.is_authorized(sender, "org.selinux.semodule_list"):
+            raise dbus.exceptions.DBusException("Not authorized")
         p = Popen(["/usr/sbin/semodule", "--list=full"], stdout=PIPE, stderr=PIPE, universal_newlines=True)
         buf = p.stdout.read()
         output = p.communicate()
@@ -62,25 +71,28 @@ class selinux_server(slip.dbus.service.Object):
     #
     # The restorecon method modifies any file path to the default system label
     #
-    @slip.dbus.polkit.require_auth("org.selinux.restorecon")
-    @dbus.service.method("org.selinux", in_signature='s')
-    def restorecon(self, path):
+    @dbus.service.method("org.selinux", in_signature='s', sender_keyword="sender")
+    def restorecon(self, path, sender):
+        if not self.is_authorized(sender, "org.selinux.restorecon"):
+            raise dbus.exceptions.DBusException("Not authorized")
         selinux.restorecon(str(path), recursive=1)
 
     #
     # The setenforce method turns off the current enforcement of SELinux
     #
-    @slip.dbus.polkit.require_auth("org.selinux.setenforce")
-    @dbus.service.method("org.selinux", in_signature='i')
-    def setenforce(self, value):
+    @dbus.service.method("org.selinux", in_signature='i', sender_keyword="sender")
+    def setenforce(self, value, sender):
+        if not self.is_authorized(sender, "org.selinux.setenforce"):
+            raise dbus.exceptions.DBusException("Not authorized")
         selinux.security_setenforce(value)
 
     #
     # The setenforce method turns off the current enforcement of SELinux
     #
-    @slip.dbus.polkit.require_auth("org.selinux.relabel_on_boot")
-    @dbus.service.method("org.selinux", in_signature='i')
-    def relabel_on_boot(self, value):
+    @dbus.service.method("org.selinux", in_signature='i', sender_keyword="sender")
+    def relabel_on_boot(self, value, sender):
+        if not self.is_authorized(sender, "org.selinux.relabel_on_boot"):
+            raise dbus.exceptions.DBusException("Not authorized")
         if value == 1:
             fd = open("/.autorelabel", "w")
             fd.close()
@@ -111,9 +123,10 @@ class selinux_server(slip.dbus.service.Object):
     #
     # The change_default_enforcement modifies the current enforcement mode
     #
-    @slip.dbus.polkit.require_auth("org.selinux.change_default_mode")
-    @dbus.service.method("org.selinux", in_signature='s')
-    def change_default_mode(self, value):
+    @dbus.service.method("org.selinux", in_signature='s', sender_keyword="sender")
+    def change_default_mode(self, value, sender):
+        if not self.is_authorized(sender, "org.selinux.change_default_mode"):
+            raise dbus.exceptions.DBusException("Not authorized")
         values = ["enforcing", "permissive", "disabled"]
         if value not in values:
             raise ValueError("Enforcement mode must be %s" % ", ".join(values))
@@ -122,9 +135,10 @@ class selinux_server(slip.dbus.service.Object):
     #
     # The change_default_policy method modifies the policy type
     #
-    @slip.dbus.polkit.require_auth("org.selinux.change_default_policy")
-    @dbus.service.method("org.selinux", in_signature='s')
-    def change_default_policy(self, value):
+    @dbus.service.method("org.selinux", in_signature='s', sender_keyword="sender")
+    def change_default_policy(self, value, sender):
+        if not self.is_authorized(sender, "org.selinux.change_default_policy"):
+            raise dbus.exceptions.DBusException("Not authorized")
         path = selinux.selinux_path() + value
         if os.path.isdir(path):
             return self.write_selinux_config(policy=value)
@@ -136,5 +150,4 @@ if __name__ == "__main__":
     system_bus = dbus.SystemBus()
     name = dbus.service.BusName("org.selinux", system_bus)
     object = selinux_server(system_bus, "/org/selinux/object")
-    slip.dbus.service.set_mainloop(mainloop)
     mainloop.run()
diff --git a/python/sepolicy/sepolicy/sedbus.py b/python/sepolicy/sepolicy/sedbus.py
index 76b259ae27e8..39b53d47753a 100644
--- a/python/sepolicy/sepolicy/sedbus.py
+++ b/python/sepolicy/sepolicy/sedbus.py
@@ -2,7 +2,6 @@ import sys
 import dbus
 import dbus.service
 import dbus.mainloop.glib
-from slip.dbus import polkit
 
 
 class SELinuxDBus (object):
@@ -11,42 +10,34 @@ class SELinuxDBus (object):
         self.bus = dbus.SystemBus()
         self.dbus_object = self.bus.get_object("org.selinux", "/org/selinux/object")
 
-    @polkit.enable_proxy
     def semanage(self, buf):
         ret = self.dbus_object.semanage(buf, dbus_interface="org.selinux")
         return ret
 
-    @polkit.enable_proxy
     def restorecon(self, path):
         ret = self.dbus_object.restorecon(path, dbus_interface="org.selinux")
         return ret
 
-    @polkit.enable_proxy
     def setenforce(self, value):
         ret = self.dbus_object.setenforce(value, dbus_interface="org.selinux")
         return ret
 
-    @polkit.enable_proxy
     def customized(self):
         ret = self.dbus_object.customized(dbus_interface="org.selinux")
         return ret
 
-    @polkit.enable_proxy
     def semodule_list(self):
         ret = self.dbus_object.semodule_list(dbus_interface="org.selinux")
         return ret
 
-    @polkit.enable_proxy
     def relabel_on_boot(self, value):
         ret = self.dbus_object.relabel_on_boot(value, dbus_interface="org.selinux")
         return ret
 
-    @polkit.enable_proxy
     def change_default_mode(self, value):
         ret = self.dbus_object.change_default_mode(value, dbus_interface="org.selinux")
         return ret
 
-    @polkit.enable_proxy
     def change_default_policy(self, value):
         ret = self.dbus_object.change_default_policy(value, dbus_interface="org.selinux")
         return ret
-- 
2.32.0




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