TOMOYO: Add built-in policy support.
To be able to start using enforcing mode from the early stage of boot sequence,
this patch adds support for built-in policy configuration (and next patch adds
support for activating access control without calling external policy loader
program).
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/Makefile b/security/tomoyo/Makefile
index b13f7f9..04f676a 100644
--- a/security/tomoyo/Makefile
+++ b/security/tomoyo/Makefile
@@ -1 +1,48 @@
obj-y = audit.o common.o domain.o file.o gc.o group.o load_policy.o memory.o mount.o realpath.o securityfs_if.o tomoyo.o util.o
+
+$(obj)/policy/profile.conf:
+ @mkdir -p $(obj)/policy/
+ @echo Creating an empty policy/profile.conf
+ @touch $@
+
+$(obj)/policy/exception_policy.conf:
+ @mkdir -p $(obj)/policy/
+ @echo Creating a default policy/exception_policy.conf
+ @echo initialize_domain /sbin/modprobe from any >> $@
+ @echo initialize_domain /sbin/hotplug from any >> $@
+
+$(obj)/policy/domain_policy.conf:
+ @mkdir -p $(obj)/policy/
+ @echo Creating an empty policy/domain_policy.conf
+ @touch $@
+
+$(obj)/policy/manager.conf:
+ @mkdir -p $(obj)/policy/
+ @echo Creating an empty policy/manager.conf
+ @touch $@
+
+$(obj)/policy/stat.conf:
+ @mkdir -p $(obj)/policy/
+ @echo Creating an empty policy/stat.conf
+ @touch $@
+
+$(obj)/builtin-policy.h: $(obj)/policy/profile.conf $(obj)/policy/exception_policy.conf $(obj)/policy/domain_policy.conf $(obj)/policy/manager.conf $(obj)/policy/stat.conf
+ @echo Generating built-in policy for TOMOYO 2.4.x.
+ @echo "static char tomoyo_builtin_profile[] __initdata =" > $@.tmp
+ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/profile.conf >> $@.tmp
+ @echo "\"\";" >> $@.tmp
+ @echo "static char tomoyo_builtin_exception_policy[] __initdata =" >> $@.tmp
+ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/exception_policy.conf >> $@.tmp
+ @echo "\"\";" >> $@.tmp
+ @echo "static char tomoyo_builtin_domain_policy[] __initdata =" >> $@.tmp
+ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/domain_policy.conf >> $@.tmp
+ @echo "\"\";" >> $@.tmp
+ @echo "static char tomoyo_builtin_manager[] __initdata =" >> $@.tmp
+ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/manager.conf >> $@.tmp
+ @echo "\"\";" >> $@.tmp
+ @echo "static char tomoyo_builtin_stat[] __initdata =" >> $@.tmp
+ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/stat.conf >> $@.tmp
+ @echo "\"\";" >> $@.tmp
+ @mv $@.tmp $@
+
+$(obj)/common.o: $(obj)/builtin-policy.h
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 7bc0d1d..01e60ad 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -2361,3 +2361,63 @@
tomoyo_read_unlock(idx);
printk(KERN_INFO "Mandatory Access Control activated.\n");
}
+
+/**
+ * tomoyo_load_builtin_policy - Load built-in policy.
+ *
+ * Returns nothing.
+ */
+void __init tomoyo_load_builtin_policy(void)
+{
+ /*
+ * This include file is manually created and contains built-in policy
+ * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
+ * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
+ * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
+ */
+#include "builtin-policy.h"
+ u8 i;
+ const int idx = tomoyo_read_lock();
+ for (i = 0; i < 5; i++) {
+ struct tomoyo_io_buffer head = { };
+ char *start = "";
+ switch (i) {
+ case 0:
+ start = tomoyo_builtin_profile;
+ head.type = TOMOYO_PROFILE;
+ head.write = tomoyo_write_profile;
+ break;
+ case 1:
+ start = tomoyo_builtin_exception_policy;
+ head.type = TOMOYO_EXCEPTIONPOLICY;
+ head.write = tomoyo_write_exception;
+ break;
+ case 2:
+ start = tomoyo_builtin_domain_policy;
+ head.type = TOMOYO_DOMAINPOLICY;
+ head.write = tomoyo_write_domain;
+ break;
+ case 3:
+ start = tomoyo_builtin_manager;
+ head.type = TOMOYO_MANAGER;
+ head.write = tomoyo_write_manager;
+ break;
+ case 4:
+ start = tomoyo_builtin_stat;
+ head.type = TOMOYO_STAT;
+ head.write = tomoyo_write_stat;
+ break;
+ }
+ while (1) {
+ char *end = strchr(start, '\n');
+ if (!end)
+ break;
+ *end = '\0';
+ tomoyo_normalize_line(start);
+ head.write_buf = start;
+ tomoyo_parse_policy(&head, start);
+ start = end + 1;
+ }
+ }
+ tomoyo_read_unlock(idx);
+}
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index 7984a0e..a15fe29 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -662,6 +662,7 @@
void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp);
void tomoyo_update_stat(const u8 index);
void __init tomoyo_mm_init(void);
+void __init tomoyo_load_builtin_policy(void);
int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
const struct tomoyo_path_info *filename);
int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c
index 78b6143..46538ce 100644
--- a/security/tomoyo/memory.c
+++ b/security/tomoyo/memory.c
@@ -215,14 +215,4 @@
INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
tomoyo_kernel_domain.domainname = tomoyo_get_name("<kernel>");
list_add_tail_rcu(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
-#if 0
- /* Will be replaced with tomoyo_load_builtin_policy(). */
- {
- /* Load built-in policy. */
- tomoyo_write_transition_control("/sbin/hotplug", false,
- TOMOYO_TRANSITION_CONTROL_INITIALIZE);
- tomoyo_write_transition_control("/sbin/modprobe", false,
- TOMOYO_TRANSITION_CONTROL_INITIALIZE);
- }
-#endif
}