1 // Copyright 2015 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <limits> 6 #include <string> 7 8 #include "core/fpdfapi/parser/cpdf_parser.h" 9 #include "core/fpdfapi/parser/cpdf_syntax_parser.h" 10 #include "core/fxcrt/fx_extension.h" 11 #include "core/fxcrt/fx_stream.h" 12 #include "core/fxcrt/retain_ptr.h" 13 #include "testing/fx_string_testhelpers.h" 14 #include "testing/gtest/include/gtest/gtest.h" 15 #include "testing/utils/path_service.h" 16 17 // A wrapper class to help test member functions of CPDF_Parser. 18 class CPDF_TestParser : public CPDF_Parser { 19 public: 20 CPDF_TestParser() {} 21 ~CPDF_TestParser() {} 22 23 // Setup reading from a file and initial states. 24 bool InitTestFromFile(const char* path) { 25 RetainPtr<IFX_SeekableReadStream> pFileAccess = 26 IFX_SeekableReadStream::CreateFromFilename(path); 27 if (!pFileAccess) 28 return false; 29 30 // For the test file, the header is set at the beginning. 31 m_pSyntax->InitParser(pFileAccess, 0); 32 return true; 33 } 34 35 // Setup reading from a buffer and initial states. 36 bool InitTestFromBuffer(const unsigned char* buffer, size_t len) { 37 // For the test file, the header is set at the beginning. 38 m_pSyntax->InitParser( 39 pdfium::MakeRetain<CFX_BufferSeekableReadStream>(buffer, len), 0); 40 return true; 41 } 42 43 private: 44 // Add test cases here as private friend so that protected members in 45 // CPDF_Parser can be accessed by test cases. 46 // Need to access RebuildCrossRef. 47 FRIEND_TEST(cpdf_parser, RebuildCrossRefCorrectly); 48 FRIEND_TEST(cpdf_parser, RebuildCrossRefFailed); 49 // Need to access LoadCrossRefV4. 50 FRIEND_TEST(cpdf_parser, LoadCrossRefV4); 51 }; 52 53 TEST(cpdf_parser, RebuildCrossRefCorrectly) { 54 CPDF_TestParser parser; 55 std::string test_file; 56 ASSERT_TRUE(PathService::GetTestFilePath("parser_rebuildxref_correct.pdf", 57 &test_file)); 58 ASSERT_TRUE(parser.InitTestFromFile(test_file.c_str())) << test_file; 59 60 ASSERT_TRUE(parser.RebuildCrossRef()); 61 const FX_FILESIZE offsets[] = {0, 15, 61, 154, 296, 374, 450}; 62 const uint16_t versions[] = {0, 0, 2, 4, 6, 8, 0}; 63 for (size_t i = 0; i < FX_ArraySize(offsets); ++i) 64 EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); 65 for (size_t i = 0; i < FX_ArraySize(versions); ++i) 66 EXPECT_EQ(versions[i], parser.m_ObjectInfo[i].gennum); 67 } 68 69 TEST(cpdf_parser, RebuildCrossRefFailed) { 70 CPDF_TestParser parser; 71 std::string test_file; 72 ASSERT_TRUE(PathService::GetTestFilePath( 73 "parser_rebuildxref_error_notrailer.pdf", &test_file)); 74 ASSERT_TRUE(parser.InitTestFromFile(test_file.c_str())) << test_file; 75 76 ASSERT_FALSE(parser.RebuildCrossRef()); 77 } 78 79 TEST(cpdf_parser, LoadCrossRefV4) { 80 { 81 const unsigned char xref_table[] = 82 "xref \n" 83 "0 6 \n" 84 "0000000003 65535 f \n" 85 "0000000017 00000 n \n" 86 "0000000081 00000 n \n" 87 "0000000000 00007 f \n" 88 "0000000331 00000 n \n" 89 "0000000409 00000 n \n" 90 "trail"; // Needed to end cross ref table reading. 91 CPDF_TestParser parser; 92 ASSERT_TRUE( 93 parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); 94 95 ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); 96 const FX_FILESIZE offsets[] = {0, 17, 81, 0, 331, 409}; 97 const CPDF_TestParser::ObjectType types[] = { 98 CPDF_TestParser::ObjectType::kFree, 99 CPDF_TestParser::ObjectType::kNotCompressed, 100 CPDF_TestParser::ObjectType::kNotCompressed, 101 CPDF_TestParser::ObjectType::kFree, 102 CPDF_TestParser::ObjectType::kNotCompressed, 103 CPDF_TestParser::ObjectType::kNotCompressed}; 104 for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { 105 EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); 106 EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); 107 } 108 } 109 { 110 const unsigned char xref_table[] = 111 "xref \n" 112 "0 1 \n" 113 "0000000000 65535 f \n" 114 "3 1 \n" 115 "0000025325 00000 n \n" 116 "8 2 \n" 117 "0000025518 00002 n \n" 118 "0000025635 00000 n \n" 119 "12 1 \n" 120 "0000025777 00000 n \n" 121 "trail"; // Needed to end cross ref table reading. 122 CPDF_TestParser parser; 123 ASSERT_TRUE( 124 parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); 125 126 ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); 127 const FX_FILESIZE offsets[] = {0, 0, 0, 25325, 0, 0, 0, 128 0, 25518, 25635, 0, 0, 25777}; 129 const CPDF_TestParser::ObjectType types[] = { 130 CPDF_TestParser::ObjectType::kFree, 131 CPDF_TestParser::ObjectType::kFree, 132 CPDF_TestParser::ObjectType::kFree, 133 CPDF_TestParser::ObjectType::kNotCompressed, 134 CPDF_TestParser::ObjectType::kFree, 135 CPDF_TestParser::ObjectType::kFree, 136 CPDF_TestParser::ObjectType::kFree, 137 CPDF_TestParser::ObjectType::kFree, 138 CPDF_TestParser::ObjectType::kNotCompressed, 139 CPDF_TestParser::ObjectType::kNotCompressed, 140 CPDF_TestParser::ObjectType::kFree, 141 CPDF_TestParser::ObjectType::kFree, 142 CPDF_TestParser::ObjectType::kNotCompressed}; 143 for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { 144 EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); 145 EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); 146 } 147 } 148 { 149 const unsigned char xref_table[] = 150 "xref \n" 151 "0 1 \n" 152 "0000000000 65535 f \n" 153 "3 1 \n" 154 "0000025325 00000 n \n" 155 "8 2 \n" 156 "0000000000 65535 f \n" 157 "0000025635 00000 n \n" 158 "12 1 \n" 159 "0000025777 00000 n \n" 160 "trail"; // Needed to end cross ref table reading. 161 CPDF_TestParser parser; 162 ASSERT_TRUE( 163 parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); 164 165 ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); 166 const FX_FILESIZE offsets[] = {0, 0, 0, 25325, 0, 0, 0, 167 0, 0, 25635, 0, 0, 25777}; 168 const CPDF_TestParser::ObjectType types[] = { 169 CPDF_TestParser::ObjectType::kFree, 170 CPDF_TestParser::ObjectType::kFree, 171 CPDF_TestParser::ObjectType::kFree, 172 CPDF_TestParser::ObjectType::kNotCompressed, 173 CPDF_TestParser::ObjectType::kFree, 174 CPDF_TestParser::ObjectType::kFree, 175 CPDF_TestParser::ObjectType::kFree, 176 CPDF_TestParser::ObjectType::kFree, 177 CPDF_TestParser::ObjectType::kFree, 178 CPDF_TestParser::ObjectType::kNotCompressed, 179 CPDF_TestParser::ObjectType::kFree, 180 CPDF_TestParser::ObjectType::kFree, 181 CPDF_TestParser::ObjectType::kNotCompressed}; 182 for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { 183 EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); 184 EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); 185 } 186 } 187 { 188 const unsigned char xref_table[] = 189 "xref \n" 190 "0 7 \n" 191 "0000000002 65535 f \n" 192 "0000000023 00000 n \n" 193 "0000000003 65535 f \n" 194 "0000000004 65535 f \n" 195 "0000000000 65535 f \n" 196 "0000000045 00000 n \n" 197 "0000000179 00000 n \n" 198 "trail"; // Needed to end cross ref table reading. 199 CPDF_TestParser parser; 200 ASSERT_TRUE( 201 parser.InitTestFromBuffer(xref_table, FX_ArraySize(xref_table))); 202 203 ASSERT_TRUE(parser.LoadCrossRefV4(0, false)); 204 const FX_FILESIZE offsets[] = {0, 23, 0, 0, 0, 45, 179}; 205 const CPDF_TestParser::ObjectType types[] = { 206 CPDF_TestParser::ObjectType::kFree, 207 CPDF_TestParser::ObjectType::kNotCompressed, 208 CPDF_TestParser::ObjectType::kFree, 209 CPDF_TestParser::ObjectType::kFree, 210 CPDF_TestParser::ObjectType::kFree, 211 CPDF_TestParser::ObjectType::kNotCompressed, 212 CPDF_TestParser::ObjectType::kNotCompressed}; 213 for (size_t i = 0; i < FX_ArraySize(offsets); ++i) { 214 EXPECT_EQ(offsets[i], parser.m_ObjectInfo[i].pos); 215 EXPECT_EQ(types[i], parser.m_ObjectInfo[i].type); 216 } 217 } 218 } 219
