Commit Graph

5 Commits

Author SHA1 Message Date
Robert Craig
99a626c271 Augment SELinuxMMAC functionality.
* No longer support a package name stanza outside of
  a signature tag. Package names, by themselves, have
  no security associated with them in Android and thus we
  should not be allowing or encouraging this
  type of policy.

* Allow for nested package name stanzas inside
  signature stanzas. There are cases where a finer
  distinction needs to be made among apps signed with
  the same cert. New code allows a different seinfo
  tag to be assigned to the listed package names
  signed by the parent cert. When a determination needs
  to be made concerning seinfo assignments, the inner
  seinfo tag takes precedence over the outer seinfo
  labels which are assigned to just the signature.

* Temp structures are now used to parse new policy files
  until the entire xml file is parsed and deemed correct,
  at which time the temp structures are copied over to the
  permanent class structures. This ensures that any structural
  errors with the policy will not result in partial loads.

* Valid stanzas look like the following with the inner
  package piece being optional.

   <signer signature="">
     <seinfo value=""/>
     <package name="">
       <seinfo value=""/>
     </package>
   <signer>

   <default>
     <seinfo value=""/>
   </default>

Change-Id: Ia204d71211776dcf9b2dcc86ad6d77c4ad39dc25
2013-12-06 08:51:20 -05:00
Stephen Smalley
1274612985 Remove /data/system location for mac_permissions.xml.
/data/system is no longer the right location for mac_permissions.xml.
Remove it.

Change-Id: Iabefb734b40d6785013bd6f6427931939fd0648b
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-04-05 13:38:02 -04:00
Stephen Smalley
2c90ac6849 Add /data/security path for mac_permissions.xml.
/data/security is now the preferred location for updated policy files.
Add it for mac_permissions.xml.
Separate change will remove the old /data/system location.

Change-Id: I2774661e84c858c9b698ec60e224bbbcdac732f3
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-04-05 13:37:27 -04:00
Robert Craig
d417ab0ea5 Add data validation on seinfo labels.
Ensure that policy contains a clean seinfo
string. Where clean means no whitespace characters.

Change-Id: I814411cbc8d16eaed99a1389f5487529e36e617b
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
2013-03-28 12:19:27 -04:00
Robert Craig
d3f8d0333c Add seinfo parsing to PackageManagerService.
This patch set allows the PMS to parse the
mac_permissions.xml file which contains the
seinfo values. Each package that is installed
on the device will be assigned an seinfo value
based on policy. This seinfo value will help label
the app process and data directory.  Modifications
include adjustments to ApplicationInfo.java
to store the seinfo tag per package as well as
adjustments to installd to communicate the seinfo
tag to libselinux.

Change-Id: I61ad1ea12fb6a9a6d0b108ec163bc4bf4c954b58
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
2013-03-25 06:33:03 -04:00