Updating OTS repo from https://github.com/khaledhosny/ots.git

third_party/ots/test/validator-checker.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#if !defined(_MSC_VER)
+#ifdef __linux__
+// Linux
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_OUTLINE_H
+#else
+// Mac OS X
+#include <ApplicationServices/ApplicationServices.h>  // g++ -framework Cocoa
+#endif  // __linux__
+#else
+// Windows
+// TODO(yusukes): Support Windows.
+#endif  // _MSC_VER
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+#include "opentype-sanitiser.h"
+#include "ots-memory-stream.h"
+
+namespace {
+
+#if !defined(_MSC_VER)
+#ifdef __linux__
+// Linux
+void LoadChar(FT_Face face, int pt, FT_ULong c) {
+  FT_Matrix matrix;
+  matrix.xx = matrix.yy = 1 << 16;
+  matrix.xy = matrix.yx = 0 << 16;
+
+  FT_Set_Char_Size(face, pt * (1 << 6), 0, 72, 0);
+  FT_Set_Transform(face, &matrix, 0);
+  FT_Load_Char(face, c, FT_LOAD_RENDER);
+}
+
+int OpenAndLoadChars(
+    const char *file_name, uint8_t *trans_font, size_t trans_len) {
+  FT_Library library;
+  FT_Error error = FT_Init_FreeType(&library);
+  if (error) {
+    std::fprintf(stderr, "Failed to initialize FreeType2!\n");
+    return 1;
+  }
+
+  FT_Face trans_face;
+  error = FT_New_Memory_Face(library, trans_font, trans_len, 0, &trans_face);
+  if (error) {
+    std::fprintf(stderr,
+                 "OK: FreeType2 couldn't open the transcoded font: %s\n",
+                 file_name);
+    return 0;
+  }
+
+  static const int kPts[] = {100, 20, 18, 16, 12, 10, 8};  // pt
+  static const size_t kPtsLen = sizeof(kPts) / sizeof(kPts[0]);
+
+  static const int kUnicodeRanges[] = {
+    0x0020, 0x007E,  // Basic Latin (ASCII)
+    0x00A1, 0x017F,  // Latin-1
+    0x1100, 0x11FF,  // Hangul
+    0x3040, 0x309F,  // Japanese HIRAGANA letters
+    0x3130, 0x318F,  // Hangul
+    0x4E00, 0x4F00,  // CJK Kanji/Hanja
+    0xAC00, 0xAD00,  // Hangul
+  };
+  static const size_t kUnicodeRangesLen
+      = sizeof(kUnicodeRanges) / sizeof(kUnicodeRanges[0]);
+
+  for (size_t i = 0; i < kPtsLen; ++i) {
+    for (size_t j = 0; j < kUnicodeRangesLen; j += 2) {
+      for (int k = 0; k <= kUnicodeRanges[j + 1] - kUnicodeRanges[j]; ++k) {
+        LoadChar(trans_face, kPts[i], kUnicodeRanges[j] + k);
+      }
+    }
+  }
+
+  std::fprintf(stderr, "OK: FreeType2 didn't crash: %s\n", file_name);
+  return 0;
+}
+#else
+// Mac OS X
+int OpenAndLoadChars(
+    const char *file_name, uint8_t *trans_font, size_t trans_len) {
+  CFDataRef data = CFDataCreate(0, trans_font, trans_len);
+  if (!data) {
+    std::fprintf(stderr,
+                 "OK: font renderer couldn't open the transcoded font: %s\n",
+                 file_name);
+    return 0;
+  }
+
+  CGDataProviderRef dataProvider = CGDataProviderCreateWithCFData(data);
+  CGFontRef cgFontRef = CGFontCreateWithDataProvider(dataProvider);
+  CGDataProviderRelease(dataProvider);
+  CFRelease(data);
+  if (!cgFontRef) {
+    std::fprintf(stderr,
+                 "OK: font renderer couldn't open the transcoded font: %s\n",
+                 file_name);
+    return 0;
+  }
+
+  size_t numGlyphs = CGFontGetNumberOfGlyphs(cgFontRef);
+  CGFontRelease(cgFontRef);
+  if (!numGlyphs) {
+    std::fprintf(stderr,
+                 "OK: font renderer couldn't open the transcoded font: %s\n",
+                 file_name);
+    return 0;
+  }
+  std::fprintf(stderr, "OK: font renderer didn't crash: %s\n", file_name);
+  // TODO(yusukes): would be better to perform LoadChar() like Linux.
+  return 0;
+}
+#endif  // __linux__
+#else
+// Windows
+// TODO(yusukes): Support Windows.
+#endif  // _MSC_VER
+
+}  // namespace
+
+int main(int argc, char **argv) {
+  if (argc != 2) {
+    std::fprintf(stderr, "Usage: %s ttf_or_otf_filename\n", argv[0]);
+    return 1;
+  }
+
+  // load the font to memory.
+  const int fd = ::open(argv[1], O_RDONLY);
+  if (fd < 0) {
+    ::perror("open");
+    return 1;
+  }
+
+  struct stat st;
+  ::fstat(fd, &st);
+  const off_t orig_len = st.st_size;
+
+  uint8_t *orig_font = new uint8_t[orig_len];
+  if (::read(fd, orig_font, orig_len) != orig_len) {
+    std::fprintf(stderr, "Failed to read file!\n");
+    return 1;
+  }
+  ::close(fd);
+
+  // transcode the malicious font.
+  static const size_t kBigPadLen = 1024 * 1024;  // 1MB
+  uint8_t *trans_font = new uint8_t[orig_len + kBigPadLen];
+  ots::MemoryStream output(trans_font, orig_len + kBigPadLen);
+  ots::OTSContext context;
+
+  bool result = context.Process(&output, orig_font, orig_len);
+  if (!result) {
+    std::fprintf(stderr, "OK: the malicious font was filtered: %s\n", argv[1]);
+    return 0;
+  }
+  const size_t trans_len = output.Tell();
+
+  return OpenAndLoadChars(argv[1], trans_font, trans_len);
+}