pidgin/pidgin

Add fuzzing support for some libpurple features
release-2.x.y
2021-06-24, Jordy Zomer <>
97c51d97d375
Add fuzzing support for some libpurple features

Testing Done:
Hi!

I built and tested all of these fuzzers for libpurple.

You can build them by first building pidgin/libpurple with `--enable-fuzzing` then going into `libpurple/tests` and run `make check`. After that you can run these fuzzers. With a dictionary if you want :)

for example:
```bash
$ ./fuzz_markup_strip_html -dict=dictionaries/html.dict
Dictionary: 465 entries
INFO: Seed: 2274862685
INFO: Loaded 1 modules (3 inline 8-bit counters): 3 [0x5a4ec0, 0x5a4ec3),
INFO: Loaded 1 PC tables (3 PCs): 3 [0x568ee8,0x568f18),
INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
INFO: A corpus is not provided, starting from an empty corpus
#2 INITED cov: 2 ft: 2 corp: 1/1b exec/s: 0 rss: 30Mb
#1048576 pulse cov: 2 ft: 2 corp: 1/1b lim: 4096 exec/s: 524288 rss: 789Mb
#2097152 pulse cov: 2 ft: 2 corp: 1/1b lim: 4096 exec/s: 524288 rss: 792Mb
```

Best Regards,

Jordy Zomer

Reviewed at https://reviews.imfreedom.org/r/760/
#include <string.h>
#include "tests.h"
#include "../xmlnode.h"
#include "../protocols/jabber/caps.h"
START_TEST(test_parse_invalid)
{
xmlnode *query;
fail_unless(NULL == jabber_caps_parse_client_info(NULL));
/* Something other than a disco#info query */
query = xmlnode_new("foo");
fail_unless(NULL == jabber_caps_parse_client_info(query));
xmlnode_free(query);
query = xmlnode_new("query");
fail_unless(NULL == jabber_caps_parse_client_info(query));
xmlnode_set_namespace(query, "jabber:iq:last");
fail_unless(NULL == jabber_caps_parse_client_info(query));
xmlnode_free(query);
}
END_TEST
#define assert_caps_calculate_match(hash_func, hash, str) { \
xmlnode *query = xmlnode_from_str((str), -1); \
JabberCapsClientInfo *info = jabber_caps_parse_client_info(query); \
gchar *got_hash = jabber_caps_calculate_hash(info, (hash_func)); \
assert_string_equal_free((hash), got_hash); \
}
START_TEST(test_calculate_caps)
{
assert_caps_calculate_match("sha1", "GNjxthSckUNvAIoCCJFttjl6VL8=",
"<query xmlns='http://jabber.org/protocol/disco#info' node='http://tkabber.jabber.ru/#GNjxthSckUNvAIoCCJFttjl6VL8='><identity category='client' type='pc' name='Tkabber'/><x xmlns='jabber:x:data' type='result'><field var='FORM_TYPE' type='hidden'><value>urn:xmpp:dataforms:softwareinfo</value></field><field var='software'><value>Tkabber</value></field><field var='software_version'><value> ( 8.5.5 )</value></field><field var='os'><value>ATmega640-16AU</value></field><field var='os_version'><value/></field></x><feature var='games:board'/><feature var='google:mail:notify'/><feature var='http://jabber.org/protocol/activity'/><feature var='http://jabber.org/protocol/bytestreams'/><feature var='http://jabber.org/protocol/chatstates'/><feature var='http://jabber.org/protocol/commands'/><feature var='http://jabber.org/protocol/commands'/><feature var='http://jabber.org/protocol/disco#info'/><feature var='http://jabber.org/protocol/disco#items'/><feature var='http://jabber.org/protocol/feature-neg'/><feature var='http://jabber.org/protocol/geoloc'/><feature var='http://jabber.org/protocol/ibb'/><feature var='http://jabber.org/protocol/iqibb'/><feature var='http://jabber.org/protocol/mood'/><feature var='http://jabber.org/protocol/muc'/><feature var='http://jabber.org/protocol/mute#ancestor'/><feature var='http://jabber.org/protocol/mute#editor'/><feature var='http://jabber.org/protocol/rosterx'/><feature var='http://jabber.org/protocol/si'/><feature var='http://jabber.org/protocol/si/profile/file-transfer'/><feature var='http://jabber.org/protocol/tune'/><feature var='jabber:iq:avatar'/><feature var='jabber:iq:browse'/><feature var='jabber:iq:dtcp'/><feature var='jabber:iq:filexfer'/><feature var='jabber:iq:ibb'/><feature var='jabber:iq:inband'/><feature var='jabber:iq:jidlink'/><feature var='jabber:iq:last'/><feature var='jabber:iq:oob'/><feature var='jabber:iq:privacy'/><feature var='jabber:iq:time'/><feature var='jabber:iq:version'/><feature var='jabber:x:data'/><feature var='jabber:x:event'/><feature var='jabber:x:oob'/><feature var='urn:xmpp:ping'/><feature var='urn:xmpp:receipts'/><feature var='urn:xmpp:time'/></query>");
}
END_TEST
Suite *
jabber_caps_suite(void)
{
Suite *s = suite_create("Jabber Caps Functions");
TCase *tc = tcase_create("Parsing invalid ndoes");
tcase_add_test(tc, test_parse_invalid);
suite_add_tcase(s, tc);
tc = tcase_create("Calculating from XMLnode");
tcase_add_test(tc, test_calculate_caps);
suite_add_tcase(s, tc);
return s;
}