1 // Copyright 2020 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <cairo.h>
16 #include <cairo-pdf.h>
17 #include "fuzzer_temp_file.h"
18
19 static cairo_surface_t *
acquire(cairo_pattern_t * pattern,void * closure,cairo_surface_t * target,const cairo_rectangle_int_t * extents)20 acquire (cairo_pattern_t *pattern, void *closure,
21 cairo_surface_t *target,
22 const cairo_rectangle_int_t *extents)
23 {
24 return cairo_image_surface_create_from_png(closure);
25 }
26
27 static void
release(cairo_pattern_t * pattern,void * closure,cairo_surface_t * surface)28 release (cairo_pattern_t *pattern, void *closure, cairo_surface_t *surface)
29 {
30 cairo_surface_destroy(surface);
31 }
32
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)33 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
34 cairo_t *cr;
35 cairo_surface_t *surface;
36 cairo_pattern_t *pattern;
37 cairo_content_t content;
38 cairo_status_t status;
39 int w, h;
40
41 char *tmpfile = fuzzer_get_tmpfile(data, size);
42 surface = cairo_image_surface_create_from_png(tmpfile);
43 status = cairo_surface_status (surface);
44 if (status != CAIRO_STATUS_SUCCESS) {
45 fuzzer_release_tmpfile(tmpfile);
46 return 0;
47 }
48
49 cr = cairo_create(surface);
50 content = cairo_surface_get_content(surface);
51 w = cairo_image_surface_get_width(surface);
52 h = cairo_image_surface_get_height(surface);
53
54 char *buf = (char *) calloc(size + 1, sizeof(char));
55 memcpy(buf, data, size);
56 buf[size] = '\0';
57
58 pattern = cairo_pattern_create_raster_source(buf, content, w, h);
59 cairo_raster_source_pattern_set_acquire (pattern, acquire, release);
60 cairo_set_source(cr, pattern);
61 cairo_pdf_surface_set_page_label(surface, buf);
62 cairo_pdf_surface_set_metadata(surface, CAIRO_PDF_METADATA_KEYWORDS, buf);
63 cairo_paint(cr);
64
65 cairo_destroy(cr);
66 cairo_pattern_destroy(pattern);
67 cairo_surface_destroy(surface);
68 free(buf);
69 fuzzer_release_tmpfile(tmpfile);
70 return 0;
71 }
72