kc3-lang/harfbuzz/test/api/test-subset-hdmx.c

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• Hash : 07851aae
  Author :
  Date : 2018-03-26T20:56:56
  

  [subset] Couple of fixes for fuzzer discovered issues. (#924)
  
  * [subset] sanitize individual DeviceRecord's as part of hdmx sanitization.
  
  * [subset] Fix out of bounds read with non-two byte align glyphs.
  
  * [subset] Just use size_device_record >= DeviceRecord::min_size.
  
  * [subset] Add TODO.
  
  * [subset] Re-order checks in hdmx sanitize.
  

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• test/api/test-subset-hdmx.c

• /*
   * Copyright © 2018  Google, Inc.
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Google Author(s): Garret Rieger
   */
  
  #include "hb-test.h"
  #include "hb-subset-test.h"
  
  /* Unit tests for hdmx subsetting */
  
  
  static void
  test_subset_hdmx_simple_subset (void)
  {
    hb_face_t *face_abc = hb_subset_test_open_font ("fonts/Roboto-Regular.abc.ttf");
    hb_face_t *face_ac = hb_subset_test_open_font ("fonts/Roboto-Regular.ac.ttf");
  
    hb_set_t *codepoints = hb_set_create ();
    hb_face_t *face_abc_subset;
    hb_set_add (codepoints, 'a');
    hb_set_add (codepoints, 'c');
    face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_ac, face_abc_subset, HB_TAG ('h','d','m','x'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
    hb_face_destroy (face_ac);
  }
  
  static void
  test_subset_hdmx_invalid (void)
  {
    hb_face_t *face = hb_subset_test_open_font("fonts/crash-ccc61c92d589f895174cdef6ff2e3b20e9999a1a");
  
    hb_subset_input_t *input = hb_subset_input_create_or_fail ();
    hb_set_t *codepoints = hb_subset_input_unicode_set (input);
    hb_set_add (codepoints, 'a');
    hb_set_add (codepoints, 'b');
    hb_set_add (codepoints, 'c');
  
    hb_subset_profile_t *profile = hb_subset_profile_create();
    hb_face_t *subset = hb_subset (face, profile, input);
    g_assert (subset);
    g_assert (subset == hb_face_get_empty ());
  
    hb_subset_input_destroy (input);
    hb_subset_profile_destroy (profile);
    hb_face_destroy (subset);
    hb_face_destroy (face);
  }
  
  static void
  test_subset_hdmx_fails_sanitize (void)
  {
    hb_face_t *face = hb_subset_test_open_font("fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5609911946838016");
  
    hb_subset_input_t *input = hb_subset_input_create_or_fail ();
    hb_set_t *codepoints = hb_subset_input_unicode_set (input);
    hb_set_add (codepoints, 'a');
    hb_set_add (codepoints, 'b');
    hb_set_add (codepoints, 'c');
  
    hb_subset_profile_t *profile = hb_subset_profile_create();
    hb_face_t *subset = hb_subset (face, profile, input);
    g_assert (subset);
    g_assert (subset == hb_face_get_empty ());
  
    hb_subset_input_destroy (input);
    hb_subset_profile_destroy (profile);
    hb_face_destroy (subset);
    hb_face_destroy (face);
  }
  
  static void
  test_subset_hdmx_noop (void)
  {
    hb_face_t *face_abc = hb_subset_test_open_font("fonts/Roboto-Regular.abc.ttf");
  
    hb_set_t *codepoints = hb_set_create();
    hb_face_t *face_abc_subset;
    hb_set_add (codepoints, 'a');
    hb_set_add (codepoints, 'b');
    hb_set_add (codepoints, 'c');
    face_abc_subset = hb_subset_test_create_subset (face_abc, hb_subset_test_create_input (codepoints));
    hb_set_destroy (codepoints);
  
    hb_subset_test_check (face_abc, face_abc_subset, HB_TAG ('h','d','m','x'));
  
    hb_face_destroy (face_abc_subset);
    hb_face_destroy (face_abc);
  }
  
  int
  main (int argc, char **argv)
  {
    hb_test_init (&argc, &argv);
  
    hb_test_add (test_subset_hdmx_simple_subset);
    hb_test_add (test_subset_hdmx_invalid);
    hb_test_add (test_subset_hdmx_fails_sanitize);
    hb_test_add (test_subset_hdmx_noop);
  
    return hb_test_run();
  }
  

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