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Magisk
Commits
60a7eaf2
Commit
60a7eaf2
authored
Sep 12, 2016
by
topjohnwu
Browse files
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Refacter add_rule to auto mode
parent
3f43567c
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1 changed file
with
92 additions
and
76 deletions
+92
-76
sepolicy-inject.c
sepolicy-inject.c
+92
-76
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sepolicy-inject.c
View file @
60a7eaf2
...
...
@@ -166,42 +166,6 @@ int add_irule(int s, int t, int c, int p, int effect, int not, policydb_t* polic
return
0
;
}
int
add_rule
(
char
*
s
,
char
*
t
,
char
*
c
,
char
*
p
,
int
effect
,
int
not
,
policydb_t
*
policy
)
{
type_datum_t
*
src
,
*
tgt
;
class_datum_t
*
cls
;
perm_datum_t
*
perm
;
src
=
hashtab_search
(
policy
->
p_types
.
table
,
s
);
if
(
src
==
NULL
)
{
fprintf
(
stderr
,
"source type %s does not exist
\n
"
,
s
);
return
1
;
}
tgt
=
hashtab_search
(
policy
->
p_types
.
table
,
t
);
if
(
tgt
==
NULL
)
{
fprintf
(
stderr
,
"target type %s does not exist
\n
"
,
t
);
return
1
;
}
cls
=
hashtab_search
(
policy
->
p_classes
.
table
,
c
);
if
(
cls
==
NULL
)
{
fprintf
(
stderr
,
"class %s does not exist
\n
"
,
c
);
return
1
;
}
perm
=
hashtab_search
(
cls
->
permissions
.
table
,
p
);
if
(
perm
==
NULL
)
{
if
(
cls
->
comdatum
==
NULL
)
{
fprintf
(
stderr
,
"perm %s does not exist in class %s
\n
"
,
p
,
c
);
return
1
;
}
perm
=
hashtab_search
(
cls
->
comdatum
->
permissions
.
table
,
p
);
if
(
perm
==
NULL
)
{
fprintf
(
stderr
,
"perm %s does not exist in class %s
\n
"
,
p
,
c
);
return
1
;
}
}
return
add_irule
(
src
->
s
.
value
,
tgt
->
s
.
value
,
cls
->
s
.
value
,
perm
->
s
.
value
,
effect
,
not
,
policy
);
}
int
add_typerule
(
char
*
s
,
char
*
targetAttribute
,
char
**
minusses
,
char
*
c
,
char
*
p
,
int
effect
,
int
not
,
policydb_t
*
policy
)
{
type_datum_t
*
src
,
*
tgt
;
class_datum_t
*
cls
;
...
...
@@ -433,8 +397,7 @@ int load_policy(char *filename, policydb_t *policydb, struct policy_file *pf) {
return
0
;
}
int
auto_allow
(
type_datum_t
*
src
,
type_datum_t
*
tgt
,
class_datum_t
*
cls
,
policydb_t
*
policy
)
{
perm_datum_t
*
perm
;
int
add_rule_auto
(
type_datum_t
*
src
,
type_datum_t
*
tgt
,
class_datum_t
*
cls
,
perm_datum_t
*
perm
,
int
effect
,
int
not
,
policydb_t
*
policy
)
{
hashtab_t
type_table
,
class_table
,
perm_table
;
hashtab_ptr_t
cur
;
...
...
@@ -446,7 +409,7 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
cur
=
type_table
->
htable
[
i
];
while
(
cur
!=
NULL
)
{
src
=
cur
->
datum
;
if
(
a
uto_allow
(
src
,
tgt
,
cls
,
policy
))
if
(
a
dd_rule_auto
(
src
,
tgt
,
cls
,
perm
,
effect
,
not
,
policy
))
return
1
;
cur
=
cur
->
next
;
}
...
...
@@ -456,7 +419,7 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
cur
=
type_table
->
htable
[
i
];
while
(
cur
!=
NULL
)
{
tgt
=
cur
->
datum
;
if
(
a
uto_allow
(
src
,
tgt
,
cls
,
policy
))
if
(
a
dd_rule_auto
(
src
,
tgt
,
cls
,
perm
,
effect
,
not
,
policy
))
return
1
;
cur
=
cur
->
next
;
}
...
...
@@ -466,18 +429,18 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
cur
=
class_table
->
htable
[
i
];
while
(
cur
!=
NULL
)
{
cls
=
cur
->
datum
;
if
(
a
uto_allow
(
src
,
tgt
,
cls
,
policy
))
if
(
a
dd_rule_auto
(
src
,
tgt
,
cls
,
perm
,
effect
,
not
,
policy
))
return
1
;
cur
=
cur
->
next
;
}
}
}
else
{
}
else
if
(
perm
==
NULL
)
{
perm_table
=
cls
->
permissions
.
table
;
for
(
int
i
=
0
;
i
<
perm_table
->
size
;
++
i
)
{
cur
=
perm_table
->
htable
[
i
];
while
(
cur
!=
NULL
)
{
perm
=
cur
->
datum
;
if
(
add_irule
(
src
->
s
.
value
,
tgt
->
s
.
value
,
cls
->
s
.
value
,
perm
->
s
.
value
,
AVTAB_ALLOWED
,
0
,
policy
))
if
(
add_irule
(
src
->
s
.
value
,
tgt
->
s
.
value
,
cls
->
s
.
value
,
perm
->
s
.
value
,
effect
,
not
,
policy
))
return
1
;
cur
=
cur
->
next
;
}
...
...
@@ -489,16 +452,67 @@ int auto_allow(type_datum_t *src, type_datum_t *tgt, class_datum_t *cls, policyd
cur
=
perm_table
->
htable
[
i
];
while
(
cur
!=
NULL
)
{
perm
=
cur
->
datum
;
if
(
add_irule
(
src
->
s
.
value
,
tgt
->
s
.
value
,
cls
->
s
.
value
,
perm
->
s
.
value
,
AVTAB_ALLOWED
,
0
,
policy
))
if
(
add_irule
(
src
->
s
.
value
,
tgt
->
s
.
value
,
cls
->
s
.
value
,
perm
->
s
.
value
,
effect
,
not
,
policy
))
return
1
;
cur
=
cur
->
next
;
}
}
}
}
else
{
return
add_irule
(
src
->
s
.
value
,
tgt
->
s
.
value
,
cls
->
s
.
value
,
perm
->
s
.
value
,
effect
,
not
,
policy
);
}
return
0
;
}
int
add_rule
(
char
*
s
,
char
*
t
,
char
*
c
,
char
*
p
,
int
effect
,
int
not
,
policydb_t
*
policy
)
{
type_datum_t
*
src
=
NULL
,
*
tgt
=
NULL
;
class_datum_t
*
cls
=
NULL
;
perm_datum_t
*
perm
=
NULL
;
if
(
s
)
{
src
=
hashtab_search
(
policy
->
p_types
.
table
,
s
);
if
(
src
==
NULL
)
{
fprintf
(
stderr
,
"source type %s does not exist
\n
"
,
s
);
return
1
;
}
}
if
(
t
)
{
tgt
=
hashtab_search
(
policy
->
p_types
.
table
,
t
);
if
(
tgt
==
NULL
)
{
fprintf
(
stderr
,
"target type %s does not exist
\n
"
,
t
);
return
1
;
}
}
if
(
c
)
{
cls
=
hashtab_search
(
policy
->
p_classes
.
table
,
c
);
if
(
cls
==
NULL
)
{
fprintf
(
stderr
,
"class %s does not exist
\n
"
,
c
);
return
1
;
}
}
if
(
p
)
{
if
(
c
==
NULL
)
{
fprintf
(
stderr
,
"No class is specified, cannot add perm [%s]
\n
"
,
p
);
return
1
;
}
if
(
cls
!=
NULL
)
{
perm
=
hashtab_search
(
cls
->
permissions
.
table
,
p
);
if
(
perm
==
NULL
&&
cls
->
comdatum
!=
NULL
)
{
perm
=
hashtab_search
(
cls
->
comdatum
->
permissions
.
table
,
p
);
}
if
(
perm
==
NULL
)
{
fprintf
(
stderr
,
"perm %s does not exist in class %s
\n
"
,
p
,
c
);
return
1
;
}
}
}
return
add_rule_auto
(
src
,
tgt
,
cls
,
perm
,
effect
,
not
,
policy
);
}
int
live_patch
(
policydb_t
*
policydb
)
{
char
*
filename
=
"/sys/fs/selinux/load"
;
int
fd
,
ret
;
...
...
@@ -506,6 +520,7 @@ int live_patch(policydb_t *policydb) {
size_t
len
;
policydb_to_image
(
NULL
,
policydb
,
&
data
,
&
len
);
if
(
data
==
NULL
)
fprintf
(
stderr
,
"Error!"
);
// based on libselinux security_load_policy()
fd
=
open
(
filename
,
O_RDWR
);
...
...
@@ -528,7 +543,7 @@ int main(int argc, char **argv)
{
char
*
policy
=
NULL
,
*
source
=
NULL
,
*
target
=
NULL
,
*
class
=
NULL
,
*
perm
=
NULL
;
char
*
fcon
=
NULL
,
*
outfile
=
NULL
,
*
permissive
=
NULL
,
*
attr
=
NULL
,
*
filetrans
=
NULL
;
int
exists
=
0
,
not
=
0
,
autoAllow
=
0
,
live
=
0
;
int
exists
=
0
,
not
=
0
,
live
=
0
,
builtin
=
0
;
policydb_t
policydb
;
struct
policy_file
pf
,
outpf
;
sidtab_t
sidtab
;
...
...
@@ -546,12 +561,11 @@ int main(int argc, char **argv)
{
"fcon"
,
required_argument
,
NULL
,
'f'
},
{
"filetransition"
,
required_argument
,
NULL
,
'g'
},
{
"noaudit"
,
no_argument
,
NULL
,
'n'
},
{
"
policy
"
,
required_argument
,
NULL
,
'P'
},
{
"
file
"
,
required_argument
,
NULL
,
'P'
},
{
"output"
,
required_argument
,
NULL
,
'o'
},
{
"permissive"
,
required_argument
,
NULL
,
'Z'
},
{
"not-permissive"
,
required_argument
,
NULL
,
'z'
},
{
"not"
,
no_argument
,
NULL
,
0
},
{
"auto"
,
no_argument
,
NULL
,
0
},
{
"live"
,
no_argument
,
NULL
,
0
},
{
NULL
,
0
,
NULL
,
0
}
};
...
...
@@ -562,8 +576,6 @@ int main(int argc, char **argv)
case
0
:
if
(
strcmp
(
long_options
[
option_index
].
name
,
"not"
)
==
0
)
not
=
1
;
else
if
(
strcmp
(
long_options
[
option_index
].
name
,
"auto"
)
==
0
)
autoAllow
=
1
;
else
if
(
strcmp
(
long_options
[
option_index
].
name
,
"live"
)
==
0
)
live
=
1
;
else
...
...
@@ -615,12 +627,15 @@ int main(int argc, char **argv)
}
}
if
((
!
source
||
!
target
||
!
class
||
!
perm
)
&&
!
permissive
&&
!
fcon
&&
!
attr
&&!
filetrans
&&
!
exists
&&
!
auto_allow
)
usage
(
argv
[
0
]);
// Use builtin rules if nothing specified
if
(
!
source
&&
!
target
&&
!
class
&&
!
perm
&&
!
permissive
&&
!
fcon
&&
!
attr
&&!
filetrans
&&
!
exists
)
builtin
=
1
;
// Overwrite original if not specified
if
(
!
outfile
)
outfile
=
policy
;
// Use current policy if not specified
if
(
!
policy
)
policy
=
"/sys/fs/selinux/policy"
;
...
...
@@ -635,18 +650,11 @@ int main(int argc, char **argv)
if
(
policydb_load_isids
(
&
policydb
,
&
sidtab
))
return
1
;
if
(
autoAllow
)
{
type_datum_t
*
src
=
NULL
,
*
tgt
=
NULL
;
class_datum_t
*
cls
=
NULL
;
if
(
source
)
src
=
hashtab_search
(
policydb
.
p_types
.
table
,
source
);
if
(
target
)
tgt
=
hashtab_search
(
policydb
.
p_types
.
table
,
target
);
if
(
class
)
cls
=
hashtab_search
(
policydb
.
p_classes
.
table
,
class
);
if
(
auto_allow
(
src
,
tgt
,
cls
,
&
policydb
))
return
1
;
}
else
if
(
permissive
)
{
if
(
builtin
)
{
// TODO: Create builtin rules
// builtin(&policydb);
}
else
if
(
permissive
)
{
type_datum_t
*
type
;
create_domain
(
permissive
,
&
policydb
);
type
=
hashtab_search
(
policydb
.
p_types
.
table
,
permissive
);
...
...
@@ -688,6 +696,7 @@ int main(int argc, char **argv)
return
1
;
}
else
{
//Add a rule to a whole set of typeattribute, not just a type
if
(
target
!=
NULL
)
{
if
(
*
target
==
'='
)
{
char
*
saveptr
=
NULL
;
...
...
@@ -704,7 +713,9 @@ int main(int argc, char **argv)
if
(
add_typerule
(
source
,
targetAttribute
+
1
,
vals
,
class
,
perm
,
AVTAB_ALLOWED
,
not
,
&
policydb
))
return
1
;
}
else
{
}
}
if
(
perm
!=
NULL
)
{
char
*
saveptr
=
NULL
;
char
*
p
=
strtok_r
(
perm
,
","
,
&
saveptr
);
...
...
@@ -714,6 +725,11 @@ int main(int argc, char **argv)
return
1
;
}
}
while
(
(
p
=
strtok_r
(
NULL
,
","
,
&
saveptr
))
!=
NULL
);
}
else
{
if
(
add_rule
(
source
,
target
,
class
,
perm
,
AVTAB_ALLOWED
,
not
,
&
policydb
))
{
fprintf
(
stderr
,
"Could not add rule
\n
"
);
return
1
;
}
}
}
...
...
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