Adding e4crypt support

Add selinux rules to allow file level encryption to work

Change-Id: I1e4bba23e99cf5b2624a7df843688fba6f3c3209

domain.te

@@ -92,6 +92,7 @@ allow domain alarm_device:chr_file r_file_perms;
 allow domain urandom_device:chr_file rw_file_perms;
 allow domain random_device:chr_file rw_file_perms;
 allow domain properties_device:file r_file_perms;
+allow domain init:key search;
 
 # logd access
 write_logd(domain)

file.te

@@ -49,6 +49,8 @@ type logcat_exec, exec_type, file_type;
 type coredump_file, file_type;
 # Default type for anything under /data.
 type system_data_file, file_type, data_file_type;
+# Unencrypted data
+type unencrypted_data_file, file_type, data_file_type;
 # /data/.layout_version or other installd-created files that
 # are created in a system_data_file directory.
 type install_data_file, file_type, data_file_type;

file_contexts

@@ -182,6 +182,7 @@
 #
 /data(/.*)?		u:object_r:system_data_file:s0
 /data/.layout_version		u:object_r:install_data_file:s0
+/data/unencrypted(/.*)?         u:object_r:unencrypted_data_file:s0
 /data/backup(/.*)?		u:object_r:backup_data_file:s0
 /data/secure/backup(/.*)?	u:object_r:backup_data_file:s0
 /data/security(/.*)?	u:object_r:security_file:s0

init.te

@@ -234,6 +234,18 @@ allow init metadata_block_device:blk_file rw_file_perms;
 allow init pstorefs:dir search;
 allow init pstorefs:file r_file_perms;
 
+# linux keyring configuration
+allow init init:key { write search setattr };
+
+# Allow init to link temp fs to unencrypted data on userdata
+allow init tmpfs:lnk_file { create read getattr relabelfrom };
+
+# Allow init to manipulate /data/unencrypted
+allow init unencrypted_data_file:{ file lnk_file } create_file_perms;
+allow init unencrypted_data_file:dir create_dir_perms;
+
+unix_socket_connect(init, vold, vold)
+
 ###
 ### neverallow rules
 ###

vold.te

@@ -101,3 +101,7 @@ allow vold userdata_block_device:blk_file rw_file_perms;
 
 # Access metadata block device used for encryption meta-data.
 allow vold metadata_block_device:blk_file rw_file_perms;
+
+# Allow init to manipulate /data/unencrypted
+allow vold unencrypted_data_file:{ file lnk_file } create_file_perms;
+allow vold unencrypted_data_file:dir create_dir_perms;