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/* nXml - Copyright (C) 2005-2021 baku - Andrea Marchesini
* <baku@ippolita.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <err.h>
#include <unistd.h>
#include "nxml.h"
typedef struct test_case_t {
const char *label;
nxml_t *nxml;
const char *content;
size_t content_len;
enum {
as_buffer,
as_file,
} parse_as;
nxml_error_t expected_result;
} test_case_t;
static void buffer_to_file(char *path_template, const test_case_t *tc) {
int fd;
const char *bytes;
size_t len;
fd = mkstemp(path_template);
if (fd == -1)
err(1, "mkstemp failed");
bytes = tc->content;
len = tc->content_len;
while (len > 0) {
ssize_t n;
n = write(fd, bytes, len);
switch (n) {
case 0:
close(fd);
errx(1, "write on %d returned zero?", fd);
case -1:
close(fd);
errx(1, "write on %d failed", fd);
default:
bytes += n;
len -= n;
}
}
close(fd);
}
static void run_test(const test_case_t *tc) {
nxml_error_t e = NXML_OK;
char temp_path[] = "libnxml_test_XXXXXX";
switch (tc->parse_as) {
case as_buffer:
e = nxml_parse_buffer(tc->nxml, (char *)tc->content, tc->content_len);
break;
case as_file:
buffer_to_file(temp_path, tc);
e = nxml_parse_file(tc->nxml, temp_path);
unlink(temp_path);
break;
}
if (e != tc->expected_result)
errx(1, "not ok - %s, expected %s, got %s", tc->label,
nxml_strerror(tc->nxml, tc->expected_result),
nxml_strerror(tc->nxml, e));
}
#define testn(_nxml, _test_case, _len, _expected_result) \
do { \
test_case_t tc = {.label = #_test_case, \
.nxml = _nxml, \
.content = _test_case, \
.content_len = _len, \
.expected_result = _expected_result}; \
tc.parse_as = as_buffer; \
run_test(&tc); \
\
tc.parse_as = as_file; \
run_test(&tc); \
} while (0)
#define test(_nxml, _test_case, _expected_result) \
testn(_nxml, _test_case, sizeof(_test_case) - 1, _expected_result)
#define good_xml \
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>" \
"<rss version=\"2.0\">" \
"<channel>" \
" <title>feed title</title>" \
" <description>channel description</description>" \
" <item>" \
" <title>title 0</title>" \
" <link>http://example.com</link>" \
" <description>hello</description>" \
" </item>" \
" <item>" \
" <title>title 1</title>" \
" <link>http://example.com</link>" \
" <description>world</description>" \
" </item>" \
"</channel>" \
"</rss>"
#define weird_version "<?xml version=\"999.0\" encoding=\"UTF-8\"?>"
#define xml_broken_afl_0 \
"<?xml version='1.0\" encoding=\"UTF-8\" ?>" \
"<rss version=\"2.0\">" \
"<channel>" \
" <title>feed e</title>" \
" <description>cha des</description>" \
" <item>" \
"<title>t 0</title>" \
" <link>httcom</link>" \
" <description>hello</description>" \
" </item>" \
" <item>" \
" <title>title 1</title>" \
" <link>om</link>" \
" <description>world</description>" \
" </item>" \
"</channel>" \
"</rss>"
#define xml_broken_afl_1 "<?xml ven=\"1.0\""
#define xml_broken_afl_2 \
"<!DOCTYPE root [\n" \
"<!ELEMENT root (elem)>\n" \
"<!ELEMENT elem (#PCDATA)>\n" \
"<!ATTLIST elem id ID #IMPLIED>\n" \
"<!ENTITY target SYSTEM \"dtds/737840.ent\">\n" \
"]>\n" \
"<root>\n" \
" ⌖\n" \
"</root>\n"
int main(int argc, char **argv) {
nxml_t *nxml;
if (nxml_new(&nxml) != NXML_OK)
err(1, "nxml_new failed");
nxml_set_func(nxml, nxml_print_generic);
test(nxml, good_xml, NXML_OK);
test(nxml, weird_version, NXML_ERR_PARSER);
// Test case for out of bounds read in __nxml_parse_get_tag(). Allocate a page
// worth of memory and put the problematic input at the end in the hopes of
// causing out of bounds reads to trigger a segmentation fault as the adjacent
// page is hopefully not mapped.
char *buf = malloc(4096);
if (buf == NULL)
err(1, NULL);
buf[4095] = ' ';
testn(nxml, &buf[4095], 1, NXML_ERR_PARSER);
free(buf);
/* Test cases reported by running the American Fuzzy Lop */
test(nxml, xml_broken_afl_0, NXML_ERR_PARSER);
test(nxml, xml_broken_afl_1, NXML_ERR_PARSER);
test(nxml, xml_broken_afl_2, NXML_OK);
nxml_free(nxml);
return 0;
}
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