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json: Tighten up json_iter_get_int/get_uint

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- Ensure that input isn't an empty string

- Ensure that EINVAL errno (which could be optionally returned by
  strto{ul|l} is also checked.

- Since strtoul allows '+' and '-' characters in input, ensure that
  input which is expected to be an unsigned number doesn't start with
  '-'
This commit is contained in:
Denis Kenzior 2022-01-23 11:18:29 -06:00
parent 26b7446178
commit 30b04bc3bb
1 changed files with 8 additions and 2 deletions
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10
src/json.c
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@ -309,13 +309,16 @@ bool json_iter_get_int(struct json_iter *iter, int *i)
if (!iter_get_primitive_data(iter, &ptr, &len)) if (!iter_get_primitive_data(iter, &ptr, &len))
return false; return false;
if (!len)
return false;
errno = 0; errno = 0;
t = r = strtol(ptr, &endp, 10); t = r = strtol(ptr, &endp, 10);
if (endp != ptr + len) if (endp != ptr + len)
return false; return false;
if (errno == ERANGE || r != t) if (errno == ERANGE || errno == EINVAL || r != t)
return false; return false;
if (i) if (i)
@ -335,13 +338,16 @@ bool json_iter_get_uint(struct json_iter *iter, unsigned int *i)
if (!iter_get_primitive_data(iter, &ptr, &len)) if (!iter_get_primitive_data(iter, &ptr, &len))
return false; return false;
if (!len || *((char *) ptr) == '-')
return false;
errno = 0; errno = 0;
t = r = strtoul(ptr, &endp, 10); t = r = strtoul(ptr, &endp, 10);
if (endp != ptr + len) if (endp != ptr + len)
return false; return false;
if (errno == ERANGE || r != t) if (errno == ERANGE || errno == EINVAL || r != t)
return false; return false;
if (i) if (i)