67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <libexif/exif-data.h>
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#include <libexif/exif-loader.h>
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#include <stddef.h>
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#include <stdlib.h>
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/* Extract all MakerNote tags */
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static void mnote_dump(ExifData *data) {
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ExifMnoteData *mn = exif_data_get_mnote_data(data);
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if (mn) {
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int num = exif_mnote_data_count(mn);
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/* Loop through all MakerNote tags */
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for (int i=0; i < num; ++i) {
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char buf[1024];
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exif_mnote_data_get_value(mn, i, buf, sizeof(buf));
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}
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}
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}
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static void dump_value(ExifEntry *entry, void *user_data) {
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char buf[1024];
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exif_entry_get_value(entry, buf, sizeof(buf));
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}
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static void data_func(ExifContent *content, void *user_data) {
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exif_content_foreach_entry(content, dump_value, NULL);
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}
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/* This is like exif_data_dump but without writing to stdout */
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static void data_dump(ExifData *data) {
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exif_data_foreach_content(data, data_func, NULL);
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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// Parse tags using (ultimately) exif_data_load_data()
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auto image = exif_data_new_from_data(data, size);
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if (image) {
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// Exercise the EXIF tag manipulation code
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exif_data_get_mnote_data(image);
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data_dump(image);
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mnote_dump(image);
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unsigned char *buf;
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unsigned int sz;
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exif_data_save_data(image, &buf, &sz);
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free(buf);
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exif_data_fix(image);
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exif_data_unref(image);
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}
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return 0;
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}
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