/** \file test-null.c
* \brief Pass NULL values into libexif APIs and ensure it doesn't crash.
*
* Copyright (C) 2019 Dan Fandrich <dan@coneharvesters.com>
*
* 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 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 Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#include "libexif/exif-data.h"
#include "libexif/exif-entry.h"
#include "libexif/exif-loader.h"
#include "libexif/exif-mnote-data.h"
#include <stdio.h>
#include <stdlib.h>
static void loader_null_test(void)
{
ExifLoader *l;
ExifData *d;
unsigned char ret;
const unsigned char *ccp;
unsigned int i;
l = exif_loader_new_mem(NULL);
if (l) {
fprintf(stderr, "Unexpected success in %s\n", "exif_loader_new_mem");
exit(13);
}
exif_loader_ref(NULL);
exif_loader_unref(NULL);
exif_loader_write_file(NULL, "test");
exif_loader_write_file(NULL, NULL);
ret = exif_loader_write(NULL, (unsigned char *)"x", 1);
if (ret) {
fprintf(stderr, "Unexpected success in %s\n", "exif_loader_write");
exit(13);
}
exif_loader_write(NULL, NULL, 123);
exif_loader_reset(NULL);
d = exif_loader_get_data(NULL);
if (d) {
fprintf(stderr, "Unexpected success in %s\n", "exif_loader_get_data");
exit(13);
}
exif_loader_get_buf(NULL, NULL, NULL);
exif_loader_log(NULL, NULL);
l = exif_loader_new();
if (!l) {
fprintf(stderr, "Out of memory\n");
exit(13);
}
exif_loader_write_file(l, NULL);
exif_loader_write(l, NULL, 0);
exif_loader_write(l, NULL, 1);
exif_loader_get_buf(l, NULL, NULL);
exif_loader_get_buf(l, &ccp, NULL);
exif_loader_get_buf(l, NULL, &i);
exif_loader_log(l, NULL);
exif_loader_unref(l);
}
static void data_null_test(void)
{
/* exif_data_new_from_file() is untested since it doesn't check path */
ExifData *d;
ExifByteOrder bo;
ExifMnoteData *m;
ExifDataType dt;
unsigned char *buf;
unsigned int len;
d = exif_data_new_mem(NULL);
if (d) {
fprintf(stderr, "Unexpected success in %s\n", "exif_data_new_mem");
exit(13);
}
d = exif_data_new_from_data(NULL, 123);
if (d) {
exif_data_unref(d);
}
bo = exif_data_get_byte_order(NULL);
(void) bo;
exif_data_set_byte_order(NULL, EXIF_BYTE_ORDER_MOTOROLA);
m = exif_data_get_mnote_data(NULL);
if (m) {
fprintf(stderr, "Unexpected success in %s\n", "exif_data_get_mnote_data");
exit(13);
}
exif_data_fix(NULL);
exif_data_foreach_content(NULL, NULL, NULL);
exif_data_set_option(NULL, EXIF_DATA_OPTION_FOLLOW_SPECIFICATION);
exif_data_unset_option(NULL, EXIF_DATA_OPTION_FOLLOW_SPECIFICATION);
exif_data_set_data_type(NULL, EXIF_DATA_TYPE_UNCOMPRESSED_CHUNKY);
dt = exif_data_get_data_type(NULL);
(void) dt;
exif_data_load_data(NULL, NULL, 123);
exif_data_save_data(NULL, NULL, NULL);
exif_data_log(NULL, NULL);
exif_data_dump(NULL);
exif_data_ref(NULL);
exif_data_unref(NULL);
d = exif_data_new();
if (!d) {
fprintf(stderr, "Out of memory\n");
exit(13);
}
exif_data_load_data(d, NULL, 123);
exif_data_save_data(d, NULL, &len);
exif_data_save_data(d, &buf, NULL);
exif_data_save_data(d, NULL, NULL);
exif_data_foreach_content(d, NULL, NULL);
exif_data_log(d, NULL);
exif_data_unref(d);
}
static void content_null_test(void)
{
ExifContent *c;
ExifIfd i;
c = exif_content_new_mem(NULL);
if (c) {
fprintf(stderr, "Unexpected success in %s\n", "exif_content_new_mem");
exit(13);
}
exif_content_ref(NULL);
exif_content_unref(NULL);
exif_content_free(NULL);
exif_content_get_entry(NULL, EXIF_TAG_COMPRESSION);
exif_content_fix(NULL);
exif_content_foreach_entry(NULL, NULL, NULL);
i = exif_content_get_ifd(NULL);
(void) i;
exif_content_dump(NULL, 0);
exif_content_add_entry(NULL, NULL);
exif_content_remove_entry(NULL, NULL);
exif_content_log(NULL, NULL);
c = exif_content_new();
if (!c) {
fprintf(stderr, "Out of memory\n");
exit(13);
}
exif_content_add_entry(c, NULL);
exif_content_remove_entry(c, NULL);
exif_content_log(c, NULL);
exif_content_foreach_entry(c, NULL, NULL);
exif_content_unref(c);
}
static void entry_null_test(void)
{
ExifEntry *e;
const char *v = NULL;
char buf[] = {0};
ExifData *d;
e = exif_entry_new_mem(NULL);
if (e) {
fprintf(stderr, "Unexpected success in %s\n", "exif_entry_new_mem");
exit(13);
}
exif_entry_ref(NULL);
exif_entry_unref(NULL);
exif_entry_free(NULL);
exif_entry_initialize(NULL, EXIF_TAG_COMPRESSION);
exif_entry_fix(NULL);
v = exif_entry_get_value(NULL, NULL, 123);
if (v) {
fprintf(stderr, "Unexpected success in %s\n", "exif_entry_get_value");
exit(13);
}
v = exif_entry_get_value(NULL, buf, 1);
if (v != buf) {
fprintf(stderr, "Unexpected value in %s\n", "exif_entry_get_value");
exit(13);
}
exif_entry_dump(NULL, 0);
/* Creating a plain ExifEntry isn't enough, since some functions require
* that it exists in an IFD.
*/
d = exif_data_new();
if (!d) {
fprintf(stderr, "Out of memory\n");
exit(13);
}
/* Create the mandatory EXIF fields so we have something to work with */
exif_data_fix(d);
e = exif_content_get_entry (d->ifd[EXIF_IFD_0], EXIF_TAG_X_RESOLUTION);
(void) exif_entry_get_value(e, NULL, 0);
(void) exif_entry_get_value(e, NULL, 123);
exif_data_unref(d);
}
static void mnote_null_test(void)
{
/* Note that these APIs aren't tested with a real ExifMnoteData pointer
* because it's impossible to create one without real data.
*/
exif_mnote_data_ref(NULL);
exif_mnote_data_unref(NULL);
exif_mnote_data_load(NULL, NULL, 123);
exif_mnote_data_load(NULL, (const unsigned char *)"x", 1);
exif_mnote_data_save(NULL, NULL, NULL);
exif_mnote_data_count(NULL);
exif_mnote_data_get_id(NULL, 0);
exif_mnote_data_get_name(NULL, 0);
exif_mnote_data_get_title(NULL, 0);
exif_mnote_data_get_description(NULL, 0);
exif_mnote_data_get_value(NULL, 0, NULL, 123);
exif_mnote_data_log(NULL, NULL);
}
static void log_null_test(void)
{
ExifLog *l;
static va_list va;
l = exif_log_new_mem(NULL);
if (l) {
fprintf(stderr, "Unexpected success in %s\n", "exif_log_new_mem");
exit(13);
}
exif_log_ref(NULL);
exif_log_unref(NULL);
exif_log_free(NULL);
exif_log_set_func(NULL, NULL, NULL);
exif_log(NULL, EXIF_LOG_CODE_CORRUPT_DATA, "XXX", "YYY");
exif_logv(NULL, EXIF_LOG_CODE_CORRUPT_DATA, "XXX", "YYY", va);
l = exif_log_new();
if (!l) {
fprintf(stderr, "Out of memory\n");
exit(13);
}
exif_log_set_func(l, NULL, NULL);
exif_log_unref(l);
}
int main(void)
{
loader_null_test();
data_null_test();
content_null_test();
entry_null_test();
mnote_null_test();
log_null_test();
/* If it gets here, we didn't get a SIGSEGV, so success! */
return 0;
}