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bus: parse uid/gid/pid/tid meta data from kdbus messages
[elogind.git]
/
src
/
libsystemd-bus
/
bus-signature.c
diff --git
a/src/libsystemd-bus/bus-signature.c
b/src/libsystemd-bus/bus-signature.c
index db95c8870de2ba04406f7776922943ff89e5116b..a92b7124c32b3b72a702d2a601e8e8b1c28e5614 100644
(file)
--- a/
src/libsystemd-bus/bus-signature.c
+++ b/
src/libsystemd-bus/bus-signature.c
@@
-27,6
+27,8
@@
static int signature_element_length_internal(
const char *s,
bool allow_dict_entry,
static int signature_element_length_internal(
const char *s,
bool allow_dict_entry,
+ unsigned array_depth,
+ unsigned struct_depth,
size_t *l) {
int r;
size_t *l) {
int r;
@@
-41,7
+43,10
@@
static int signature_element_length_internal(
if (*s == SD_BUS_TYPE_ARRAY) {
size_t t;
if (*s == SD_BUS_TYPE_ARRAY) {
size_t t;
- r = signature_element_length_internal(s + 1, true, &t);
+ if (array_depth >= 32)
+ return -EINVAL;
+
+ r = signature_element_length_internal(s + 1, true, array_depth+1, struct_depth, &t);
if (r < 0)
return r;
if (r < 0)
return r;
@@
-52,10
+57,13
@@
static int signature_element_length_internal(
if (*s == SD_BUS_TYPE_STRUCT_BEGIN) {
const char *p = s + 1;
if (*s == SD_BUS_TYPE_STRUCT_BEGIN) {
const char *p = s + 1;
+ if (struct_depth >= 32)
+ return -EINVAL;
+
while (*p != SD_BUS_TYPE_STRUCT_END) {
size_t t;
while (*p != SD_BUS_TYPE_STRUCT_END) {
size_t t;
- r = signature_element_length_internal(p, false, &t);
+ r = signature_element_length_internal(p, false,
array_depth, struct_depth+1,
&t);
if (r < 0)
return r;
if (r < 0)
return r;
@@
-70,13
+78,16
@@
static int signature_element_length_internal(
const char *p = s + 1;
unsigned n = 0;
const char *p = s + 1;
unsigned n = 0;
+ if (struct_depth >= 32)
+ return -EINVAL;
+
while (*p != SD_BUS_TYPE_DICT_ENTRY_END) {
size_t t;
if (n == 0 && !bus_type_is_basic(*p))
return -EINVAL;
while (*p != SD_BUS_TYPE_DICT_ENTRY_END) {
size_t t;
if (n == 0 && !bus_type_is_basic(*p))
return -EINVAL;
- r = signature_element_length_internal(p, false, &t);
+ r = signature_element_length_internal(p, false,
array_depth, struct_depth+1,
&t);
if (r < 0)
return r;
if (r < 0)
return r;
@@
-94,6
+105,11
@@
static int signature_element_length_internal(
return -EINVAL;
}
return -EINVAL;
}
+
+int signature_element_length(const char *s, size_t *l) {
+ return signature_element_length_internal(s, true, 0, 0, l);
+}
+
bool signature_is_single(const char *s) {
int r;
size_t t;
bool signature_is_single(const char *s) {
int r;
size_t t;
@@
-126,7
+142,7
@@
bool signature_is_valid(const char *s, bool allow_dict_entry) {
while (*p) {
size_t t;
while (*p) {
size_t t;
- r = signature_element_length_internal(p, allow_dict_entry, &t);
+ r = signature_element_length_internal(p, allow_dict_entry,
0, 0,
&t);
if (r < 0)
return false;
if (r < 0)
return false;
@@
-135,7
+151,3
@@
bool signature_is_valid(const char *s, bool allow_dict_entry) {
return p - s <= 255;
}
return p - s <= 255;
}
-
-int signature_element_length(const char *s, size_t *l) {
- return signature_element_length_internal(s, true, l);
-}