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TOMOYO: Add built-in policy support.

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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>
This commit is contained in:
Tetsuo Handa 2011-06-26 23:22:18 +09:00 committed by James Morris
parent b22b8b9fd9
commit efe836ab2b
4 changed files with 108 additions and 10 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

47
security/tomoyo/Makefile
View file

@ -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

60
security/tomoyo/common.c
View file

@ -2361,3 +2361,63 @@ void tomoyo_check_profile(void)
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);
}

1
security/tomoyo/common.h
View file

@ -662,6 +662,7 @@ const struct tomoyo_path_info *tomoyo_get_name(const char *name);
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,

10
security/tomoyo/memory.c
View file

@ -215,14 +215,4 @@ void __init tomoyo_mm_init(void)
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
}