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/*
* HEIF codec.
* Copyright (c) 2017 struktur AG, Joachim Bauch <bauch@struktur.de>
*
* This file is part of libheif.
*
* libheif 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 3 of
* the License, or (at your option) any later version.
*
* libheif 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 libheif. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <limits.h>
#include <stdlib.h>
#include "libheif/heif.h"
static const enum heif_colorspace kFuzzColorSpace = heif_colorspace_YCbCr;
static const enum heif_chroma kFuzzChroma = heif_chroma_420;
static void TestDecodeImage(struct heif_context* ctx,
const struct heif_image_handle* handle, size_t filesize)
{
struct heif_image* image = nullptr;
struct heif_error err;
bool primary = heif_image_handle_is_primary_image(handle);
(void) primary;
int width = heif_image_handle_get_width(handle);
int height = heif_image_handle_get_height(handle);
(void)width; (void)height;
assert(width >= 0);
assert(height >= 0);
int metadata_count = heif_image_handle_get_number_of_metadata_blocks(handle, nullptr);
assert(metadata_count >= 0);
assert(static_cast<size_t>(metadata_count) < filesize / sizeof(heif_item_id));
heif_item_id* metadata_ids = static_cast<heif_item_id*>(malloc(metadata_count * sizeof(heif_item_id)));
assert(metadata_ids);
int metadata_ids_count = heif_image_handle_get_list_of_metadata_block_IDs(handle, nullptr, metadata_ids,
metadata_count);
assert(metadata_count == metadata_ids_count);
(void)metadata_ids_count;
for (int i = 0; i < metadata_count; i++) {
heif_image_handle_get_metadata_type(handle, metadata_ids[i]);
heif_image_handle_get_metadata_content_type(handle, metadata_ids[i]);
size_t metadata_size = heif_image_handle_get_metadata_size(handle, metadata_ids[i]);
// This assertion is invalid. Metadata can in fact be larger than the file if there are several
// overlapping iloc extents. Does not make much sense, but it is technically valid.
//assert(metadata_size < filesize);
uint8_t* metadata_data = static_cast<uint8_t*>(malloc(metadata_size));
assert(metadata_data);
heif_image_handle_get_metadata(handle, metadata_ids[i], metadata_data);
free(metadata_data);
}
free(metadata_ids);
err = heif_decode_image(handle, &image, kFuzzColorSpace, kFuzzChroma, nullptr);
if (err.code != heif_error_Ok) {
heif_image_release(image);
return;
}
assert(heif_image_get_colorspace(image) == kFuzzColorSpace);
assert(heif_image_get_chroma_format(image) == kFuzzChroma);
// TODO(fancycode): Should we also check the planes?
heif_image_release(image);
}
static int clip_int(size_t size)
{
return size > INT_MAX ? INT_MAX : static_cast<int>(size);
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
struct heif_context* ctx;
struct heif_error err;
struct heif_image_handle* primary_handle = nullptr;
int images_count;
heif_item_id* image_IDs = NULL;
bool explicit_init = size == 0 || data[size - 1] & 1;
if (explicit_init) {
heif_init(nullptr);
}
heif_check_filetype(data, clip_int(size));
heif_main_brand(data, clip_int(size));
heif_get_file_mime_type(data, clip_int(size));
ctx = heif_context_alloc();
assert(ctx);
auto* limits = heif_context_get_security_limits(ctx);
limits->max_memory_block_size = 128 * 1024 * 1024; // 128 MB
err = heif_context_read_from_memory(ctx, data, size, nullptr);
if (err.code != heif_error_Ok) {
// Not a valid HEIF file passed (which is most likely while fuzzing).
goto quit;
}
err = heif_context_get_primary_image_handle(ctx, &primary_handle);
if (err.code == heif_error_Ok) {
assert(heif_image_handle_is_primary_image(primary_handle));
TestDecodeImage(ctx, primary_handle, size);
heif_image_handle_release(primary_handle);
primary_handle = nullptr;
}
images_count = heif_context_get_number_of_top_level_images(ctx);
if (!images_count) {
// File doesn't contain any images.
goto quit;
}
image_IDs = (heif_item_id*) malloc(images_count * sizeof(heif_item_id));
assert(image_IDs);
images_count = heif_context_get_list_of_top_level_image_IDs(ctx, image_IDs, images_count);
if (!images_count) {
// Could not get list of image ids.
goto quit;
}
for (int i = 0; i < images_count; ++i) {
struct heif_image_handle* image_handle = nullptr;
err = heif_context_get_image_handle(ctx, image_IDs[i], &image_handle);
if (err.code != heif_error_Ok) {
heif_image_handle_release(image_handle);
// Ignore, we are only interested in crashes here.
continue;
}
TestDecodeImage(ctx, image_handle, size);
int num_thumbnails = heif_image_handle_get_number_of_thumbnails(image_handle);
for (int t = 0; t < num_thumbnails; ++t) {
struct heif_image_handle* thumbnail_handle = nullptr;
heif_image_handle_get_thumbnail(image_handle, t, &thumbnail_handle);
if (thumbnail_handle) {
TestDecodeImage(ctx, thumbnail_handle, size);
heif_image_handle_release(thumbnail_handle);
}
}
heif_image_handle_release(image_handle);
}
quit:
heif_image_handle_release(primary_handle);
heif_context_free(ctx);
free(image_IDs);
if (explicit_init) {
heif_deinit();
}
return 0;
}
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