func (s *BoolFileInterfaceSuite) TestPlugSnippetHandlesSymlinkErrors(c *C) {
// Symbolic link traversal is handled correctly
builtin.MockEvalSymlinks(&s.BaseTest, func(path string) (string, error) {
return "", fmt.Errorf("broken symbolic link")
})
snippet, err := s.iface.ConnectedPlugSnippet(s.plug, s.gpioSlot, interfaces.SecurityAppArmor)
c.Assert(err, ErrorMatches, "cannot compute plug security snippet: broken symbolic link")
c.Assert(snippet, IsNil)
}
func (s *BoolFileInterfaceSuite) TestPermanentPlugSecurityDoesNotContainSlotSecurity(c *C) {
// Use a fake (successful) dereferencing function for the remainder of the test.
builtin.MockEvalSymlinks(&s.BaseTest, func(path string) (string, error) {
return path, nil
})
var err error
var slotSnippet, plugSnippet []byte
plugSnippet, err = s.iface.PermanentPlugSnippet(s.plug, interfaces.SecurityAppArmor)
c.Assert(err, IsNil)
slotSnippet, err = s.iface.PermanentSlotSnippet(s.gpioSlot, interfaces.SecurityAppArmor)
c.Assert(err, IsNil)
// Ensure that we don't accidentally give plug-side permissions to slot-side.
c.Assert(bytes.Contains(plugSnippet, slotSnippet), Equals, false)
}
func (s *BoolFileInterfaceSuite) TestPlugSnippetDereferencesSymlinks(c *C) {
// Use a fake (successful) dereferencing function for the remainder of the test.
builtin.MockEvalSymlinks(&s.BaseTest, func(path string) (string, error) {
return "(dereferenced)" + path, nil
})
// Extra apparmor permission to access GPIO value
// The path uses dereferenced symbolic links.
snippet, err := s.iface.ConnectedPlugSnippet(s.plug, s.gpioSlot, interfaces.SecurityAppArmor)
c.Assert(err, IsNil)
c.Assert(snippet, DeepEquals, []byte(
"(dereferenced)/sys/class/gpio/gpio13/value rwk,\n"))
// Extra apparmor permission to access LED brightness.
// The path uses dereferenced symbolic links.
snippet, err = s.iface.ConnectedPlugSnippet(s.plug, s.ledSlot, interfaces.SecurityAppArmor)
c.Assert(err, IsNil)
c.Assert(snippet, DeepEquals, []byte(
"(dereferenced)/sys/class/leds/input27::capslock/brightness rwk,\n"))
}