summaryrefslogtreecommitdiff
path: root/testing/fuzzers/pdf_hint_table_fuzzer.cc
diff options
context:
space:
mode:
authorLei Zhang <thestig@chromium.org>2018-05-25 21:47:19 +0000
committerChromium commit bot <commit-bot@chromium.org>2018-05-25 21:47:19 +0000
commitfa4d93a08d5cd4f349c480b194a3e795273b27ed (patch)
tree522fdac3c130bf525814c0c745a9cffb2f6d6a4b /testing/fuzzers/pdf_hint_table_fuzzer.cc
parent0d86f765b8361b7f9f3a5fcc659de2f52c806bd0 (diff)
downloadpdfium-fa4d93a08d5cd4f349c480b194a3e795273b27ed.tar.xz
Move fuzzers to testing/fuzzers.
Move them out of testing/libfuzzer, to make it possible to pull libfuzzer into that directory. Leave testing/libfuzzer/BUILD.gn there for now as a transitional build file. BUG=pdfium:1088 Change-Id: I4126d89dd3e075ac63477a4860e029c135866dbe Reviewed-on: https://pdfium-review.googlesource.com/32896 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'testing/fuzzers/pdf_hint_table_fuzzer.cc')
-rw-r--r--testing/fuzzers/pdf_hint_table_fuzzer.cc93
1 files changed, 93 insertions, 0 deletions
diff --git a/testing/fuzzers/pdf_hint_table_fuzzer.cc b/testing/fuzzers/pdf_hint_table_fuzzer.cc
new file mode 100644
index 0000000000..50ca5cd693
--- /dev/null
+++ b/testing/fuzzers/pdf_hint_table_fuzzer.cc
@@ -0,0 +1,93 @@
+// Copyright 2016 The PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <cstdint>
+
+#include "core/fpdfapi/parser/cpdf_array.h"
+#include "core/fpdfapi/parser/cpdf_boolean.h"
+#include "core/fpdfapi/parser/cpdf_dictionary.h"
+#include "core/fpdfapi/parser/cpdf_hint_tables.h"
+#include "core/fpdfapi/parser/cpdf_linearized_header.h"
+#include "core/fpdfapi/parser/cpdf_number.h"
+#include "core/fxcrt/cfx_bitstream.h"
+#include "third_party/base/ptr_util.h"
+#include "third_party/base/span.h"
+
+int32_t GetData(const int32_t** data32, const uint8_t** data, size_t* size) {
+ const int32_t* ret = *data32;
+ ++(*data32);
+ *data += 4;
+ *size -= 4;
+ return *ret;
+}
+
+class HintTableForFuzzing : public CPDF_HintTables {
+ public:
+ HintTableForFuzzing(CPDF_LinearizedHeader* pLinearized,
+ int shared_hint_table_offset)
+ : CPDF_HintTables(nullptr, pLinearized),
+ shared_hint_table_offset_(shared_hint_table_offset) {}
+ ~HintTableForFuzzing() {}
+
+ void Fuzz(const uint8_t* data, size_t size) {
+ if (shared_hint_table_offset_ <= 0)
+ return;
+
+ if (size < static_cast<size_t>(shared_hint_table_offset_))
+ return;
+
+ CFX_BitStream bs(pdfium::make_span(data, size));
+ if (!ReadPageHintTable(&bs))
+ return;
+ ReadSharedObjHintTable(&bs, shared_hint_table_offset_);
+ }
+
+ private:
+ int shared_hint_table_offset_;
+};
+
+class FakeLinearized : public CPDF_LinearizedHeader {
+ public:
+ explicit FakeLinearized(CPDF_Dictionary* linearized_dict)
+ : CPDF_LinearizedHeader(linearized_dict, 0) {}
+};
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+ // Need 28 bytes for |linearized_dict|.
+ // The header section of page offset hint table is 36 bytes.
+ // The header section of shared object hint table is 24 bytes.
+ if (size < 28 + 36 + 24)
+ return 0;
+
+ const int32_t* data32 = reinterpret_cast<const int32_t*>(data);
+
+ auto linearized_dict = pdfium::MakeUnique<CPDF_Dictionary>();
+ // Set initial value.
+ linearized_dict->SetNewFor<CPDF_Boolean>("Linearized", true);
+ // Set first page end offset
+ linearized_dict->SetNewFor<CPDF_Number>("E", GetData(&data32, &data, &size));
+ // Set page count
+ linearized_dict->SetNewFor<CPDF_Number>("N", GetData(&data32, &data, &size));
+ // Set first page obj num
+ linearized_dict->SetNewFor<CPDF_Number>("O", GetData(&data32, &data, &size));
+ // Set first page no
+ linearized_dict->SetNewFor<CPDF_Number>("P", GetData(&data32, &data, &size));
+
+ auto hint_info = pdfium::MakeUnique<CPDF_Array>();
+ // Add primary hint stream offset
+ hint_info->AddNew<CPDF_Number>(GetData(&data32, &data, &size));
+ // Add primary hint stream size
+ hint_info->AddNew<CPDF_Number>(GetData(&data32, &data, &size));
+ // Set hint stream info.
+ linearized_dict->SetFor("H", std::move(hint_info));
+
+ const int shared_hint_table_offset = GetData(&data32, &data, &size);
+
+ {
+ FakeLinearized linearized(linearized_dict.get());
+ HintTableForFuzzing hint_table(&linearized, shared_hint_table_offset);
+ hint_table.Fuzz(data, size);
+ }
+ return 0;
+}