domain_deprecated: remove cache access

am: 790f4c7e

Change-Id: I0dcc870c1280baf37e03b66b244e2ff046fad35d

private/domain_deprecated.te

@@ -109,37 +109,6 @@ auditallow {
 } apk_data_file:lnk_file r_file_perms;
 ')
 
-# Read already opened /cache files.
-allow domain_deprecated cache_file:dir r_dir_perms;
-allow domain_deprecated cache_file:file { getattr read };
-allow domain_deprecated cache_file:lnk_file r_file_perms;
-userdebug_or_eng(`
-auditallow {
-  domain_deprecated
-  -recovery
-  -system_server
-  -vold
-} cache_file:dir { open read search ioctl lock };
-auditallow {
-  domain_deprecated
-  -appdomain
-  -recovery
-  -system_server
-  -vold
-} cache_file:dir getattr;
-auditallow {
-  domain_deprecated
-  -recovery
-  -system_server
-  -vold
-} cache_file:file { getattr read };
-auditallow {
-  domain_deprecated
-  -system_server
-  -vold
-} cache_file:lnk_file r_file_perms;
-')
-
 # Read access to pseudo filesystems.
 r_dir_file(domain_deprecated, proc)
 r_dir_file(domain_deprecated, sysfs)

public/uncrypt.te

@@ -14,6 +14,7 @@ userdebug_or_eng(`
 
 # Read /cache/recovery/command
 # Read /cache/recovery/uncrypt_file
+allow uncrypt cache_file:dir search;
 allow uncrypt cache_recovery_file:dir rw_dir_perms;
 allow uncrypt cache_recovery_file:file create_file_perms;
 

public/update_engine_common.te

@@ -24,6 +24,8 @@ allow update_engine_common postinstall_file:file rx_file_perms;
 allow update_engine_common postinstall_file:lnk_file r_file_perms;
 allow update_engine_common postinstall_file:dir r_dir_perms;
 
+# install update.zip from cache
+r_dir_file(update_engine_common, cache_file)
 
 # A postinstall program is typically a shell script (with a #!), so we allow
 # to execute those.