static int signature_element_length_internal(
const char *s,
bool allow_dict_entry,
+ unsigned array_depth,
+ unsigned struct_depth,
size_t *l) {
int r;
- assert(s);
+ if (!s)
+ return -EINVAL;
+
+ assert(l);
if (bus_type_is_basic(*s) || *s == SD_BUS_TYPE_VARIANT) {
*l = 1;
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 (*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;
- 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;
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;
- 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;
return -EINVAL;
}
-bool signature_is_single(const char *s) {
+
+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, bool allow_dict_entry) {
int r;
size_t t;
- assert(s);
+ if (!s)
+ return false;
- r = signature_element_length(s, &t);
+ r = signature_element_length_internal(s, allow_dict_entry, 0, 0, &t);
if (r < 0)
return false;
}
bool signature_is_pair(const char *s) {
- assert(s);
+
+ if (!s)
+ return false;
if (!bus_type_is_basic(*s))
return false;
- return signature_is_single(s + 1);
+ return signature_is_single(s + 1, false);
}
bool signature_is_valid(const char *s, bool allow_dict_entry) {
const char *p;
int r;
- assert(s);
+ if (!s)
+ return false;
p = s;
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;
return p - s <= 255;
}
-
-int signature_element_length(const char *s, size_t *l) {
- return signature_element_length_internal(s, true, l);
-}