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 "core/fpdfapi/parser/fpdf_parser_decode.h" 6 7 #include <cstring> 8 #include <string> 9 10 #include "core/fxcrt/fx_basic.h" 11 #include "testing/embedder_test.h" 12 #include "testing/fx_string_testhelpers.h" 13 #include "testing/gtest/include/gtest/gtest.h" 14 #include "testing/test_support.h" 15 16 class FPDFParserDecodeEmbeddertest : public EmbedderTest {}; 17 18 // NOTE: python's zlib.compress() and zlib.decompress() may be useful for 19 // external validation of the FlateEncode/FlateDecode test cases. 20 21 TEST_F(FPDFParserDecodeEmbeddertest, FlateEncode) { 22 pdfium::StrFuncTestData flate_encode_cases[] = { 23 STR_IN_OUT_CASE("", "\x78\x9c\x03\x00\x00\x00\x00\x01"), 24 STR_IN_OUT_CASE(" ", "\x78\x9c\x53\x00\x00\x00\x21\x00\x21"), 25 STR_IN_OUT_CASE("123", "\x78\x9c\x33\x34\x32\x06\x00\01\x2d\x00\x97"), 26 STR_IN_OUT_CASE("\x00\xff", "\x78\x9c\x63\xf8\x0f\x00\x01\x01\x01\x00"), 27 STR_IN_OUT_CASE( 28 "1 0 0 -1 29 763 cm\n0 0 555 735 re\nW n\nq\n0 0 555 734.394 re\n" 29 "W n\nq\n0.8009 0 0 0.8009 0 0 cm\n1 1 1 RG 1 1 1 rg\n/G0 gs\n" 30 "0 0 693 917 re\nf\nQ\nQ\n", 31 "\x78\x9c\x33\x54\x30\x00\x42\x5d\x43\x05\x23\x4b\x05\x73\x33\x63" 32 "\x85\xe4\x5c\x2e\x90\x80\xa9\xa9\xa9\x82\xb9\xb1\xa9\x42\x51\x2a" 33 "\x57\xb8\x42\x1e\x57\x21\x92\xa0\x89\x9e\xb1\xa5\x09\x92\x84\x9e" 34 "\x85\x81\x81\x25\xd8\x14\x24\x26\xd0\x18\x43\x05\x10\x0c\x72\x57" 35 "\x80\x30\x8a\xd2\xb9\xf4\xdd\x0d\x14\xd2\x8b\xc1\x46\x99\x59\x1a" 36 "\x2b\x58\x1a\x9a\x83\x8c\x49\xe3\x0a\x04\x42\x00\x37\x4c\x1b\x42"), 37 }; 38 39 for (size_t i = 0; i < FX_ArraySize(flate_encode_cases); ++i) { 40 const pdfium::StrFuncTestData& data = flate_encode_cases[i]; 41 unsigned char* buf = nullptr; 42 unsigned int buf_size; 43 EXPECT_TRUE(FlateEncode(data.input, data.input_size, &buf, &buf_size)); 44 ASSERT_TRUE(buf); 45 EXPECT_EQ(std::string((const char*)data.expected, data.expected_size), 46 std::string((const char*)buf, buf_size)) 47 << " for case " << i; 48 FX_Free(buf); 49 } 50 } 51 52 TEST_F(FPDFParserDecodeEmbeddertest, FlateDecode) { 53 pdfium::DecodeTestData flate_decode_cases[] = { 54 STR_IN_OUT_CASE("", "", 0), 55 STR_IN_OUT_CASE("preposterous nonsense", "", 2), 56 STR_IN_OUT_CASE("\x78\x9c\x03\x00\x00\x00\x00\x01", "", 8), 57 STR_IN_OUT_CASE("\x78\x9c\x53\x00\x00\x00\x21\x00\x21", " ", 9), 58 STR_IN_OUT_CASE("\x78\x9c\x33\x34\x32\x06\x00\01\x2d\x00\x97", "123", 11), 59 STR_IN_OUT_CASE("\x78\x9c\x63\xf8\x0f\x00\x01\x01\x01\x00", "\x00\xff", 60 10), 61 STR_IN_OUT_CASE( 62 "\x78\x9c\x33\x54\x30\x00\x42\x5d\x43\x05\x23\x4b\x05\x73\x33\x63" 63 "\x85\xe4\x5c\x2e\x90\x80\xa9\xa9\xa9\x82\xb9\xb1\xa9\x42\x51\x2a" 64 "\x57\xb8\x42\x1e\x57\x21\x92\xa0\x89\x9e\xb1\xa5\x09\x92\x84\x9e" 65 "\x85\x81\x81\x25\xd8\x14\x24\x26\xd0\x18\x43\x05\x10\x0c\x72\x57" 66 "\x80\x30\x8a\xd2\xb9\xf4\xdd\x0d\x14\xd2\x8b\xc1\x46\x99\x59\x1a" 67 "\x2b\x58\x1a\x9a\x83\x8c\x49\xe3\x0a\x04\x42\x00\x37\x4c\x1b\x42", 68 "1 0 0 -1 29 763 cm\n0 0 555 735 re\nW n\nq\n0 0 555 734.394 re\n" 69 "W n\nq\n0.8009 0 0 0.8009 0 0 cm\n1 1 1 RG 1 1 1 rg\n/G0 gs\n" 70 "0 0 693 917 re\nf\nQ\nQ\n", 71 96), 72 }; 73 74 for (size_t i = 0; i < FX_ArraySize(flate_decode_cases); ++i) { 75 const pdfium::DecodeTestData& data = flate_decode_cases[i]; 76 unsigned char* result = nullptr; 77 unsigned int result_size; 78 EXPECT_EQ(data.processed_size, 79 FlateDecode(data.input, data.input_size, result, result_size)) 80 << " for case " << i; 81 ASSERT_TRUE(result); 82 EXPECT_EQ(std::string((const char*)data.expected, data.expected_size), 83 std::string((const char*)result, result_size)) 84 << " for case " << i; 85 FX_Free(result); 86 } 87 } 88 89 TEST_F(FPDFParserDecodeEmbeddertest, Bug_552046) { 90 // Tests specifying multiple image filters for a stream. Should not cause a 91 // crash when rendered. 92 EXPECT_TRUE(OpenDocument("bug_552046.pdf")); 93 FPDF_PAGE page = LoadPage(0); 94 FPDF_BITMAP bitmap = RenderPage(page); 95 CompareBitmap(bitmap, 612, 792, "1940568c9ba33bac5d0b1ee9558c76b3"); 96 FPDFBitmap_Destroy(bitmap); 97 UnloadPage(page); 98 } 99 100 TEST_F(FPDFParserDecodeEmbeddertest, Bug_555784) { 101 // Tests bad input to the run length decoder that caused a heap overflow. 102 // Should not cause a crash when rendered. 103 EXPECT_TRUE(OpenDocument("bug_555784.pdf")); 104 FPDF_PAGE page = LoadPage(0); 105 FPDF_BITMAP bitmap = RenderPage(page); 106 CompareBitmap(bitmap, 612, 792, "1940568c9ba33bac5d0b1ee9558c76b3"); 107 FPDFBitmap_Destroy(bitmap); 108 UnloadPage(page); 109 } 110 111 TEST_F(FPDFParserDecodeEmbeddertest, Bug_455199) { 112 // Tests object numbers with a value > 01000000. 113 // Should open successfully. 114 EXPECT_TRUE(OpenDocument("bug_455199.pdf")); 115 FPDF_PAGE page = LoadPage(0); 116 FPDF_BITMAP bitmap = RenderPage(page); 117 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ 118 // Rendering on Mac is inconsistent, so skip this check. 119 const char* const kExpectedMd5sum = nullptr; 120 #else 121 const char kExpectedMd5sum[] = "6f9f0fd903da177babb24dd50a806a56"; 122 #endif 123 CompareBitmap(bitmap, 200, 200, kExpectedMd5sum); 124 FPDFBitmap_Destroy(bitmap); 125 UnloadPage(page); 126 } 127
