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// Copyright 2015 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 "core/fpdfapi/parser/fpdf_parser_decode.h"
#include <cstring>
#include <string>
#include "core/fxcrt/fx_basic.h"
#include "testing/embedder_test.h"
#include "testing/fx_string_testhelpers.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/test_support.h"
class FPDFParserDecodeEmbeddertest : public EmbedderTest {};
// NOTE: python's zlib.compress() and zlib.decompress() may be useful for
// external validation of the FlateEncode/FlateDecode test cases.
TEST_F(FPDFParserDecodeEmbeddertest, FlateEncode) {
pdfium::StrFuncTestData flate_encode_cases[] = {
STR_IN_OUT_CASE("", "\x78\x9c\x03\x00\x00\x00\x00\x01"),
STR_IN_OUT_CASE(" ", "\x78\x9c\x53\x00\x00\x00\x21\x00\x21"),
STR_IN_OUT_CASE("123", "\x78\x9c\x33\x34\x32\x06\x00\01\x2d\x00\x97"),
STR_IN_OUT_CASE("\x00\xff", "\x78\x9c\x63\xf8\x0f\x00\x01\x01\x01\x00"),
STR_IN_OUT_CASE(
"1 0 0 -1 29 763 cm\n0 0 555 735 re\nW n\nq\n0 0 555 734.394 re\n"
"W n\nq\n0.8009 0 0 0.8009 0 0 cm\n1 1 1 RG 1 1 1 rg\n/G0 gs\n"
"0 0 693 917 re\nf\nQ\nQ\n",
"\x78\x9c\x33\x54\x30\x00\x42\x5d\x43\x05\x23\x4b\x05\x73\x33\x63"
"\x85\xe4\x5c\x2e\x90\x80\xa9\xa9\xa9\x82\xb9\xb1\xa9\x42\x51\x2a"
"\x57\xb8\x42\x1e\x57\x21\x92\xa0\x89\x9e\xb1\xa5\x09\x92\x84\x9e"
"\x85\x81\x81\x25\xd8\x14\x24\x26\xd0\x18\x43\x05\x10\x0c\x72\x57"
"\x80\x30\x8a\xd2\xb9\xf4\xdd\x0d\x14\xd2\x8b\xc1\x46\x99\x59\x1a"
"\x2b\x58\x1a\x9a\x83\x8c\x49\xe3\x0a\x04\x42\x00\x37\x4c\x1b\x42"),
};
for (size_t i = 0; i < FX_ArraySize(flate_encode_cases); ++i) {
const pdfium::StrFuncTestData& data = flate_encode_cases[i];
unsigned char* buf = nullptr;
unsigned int buf_size;
EXPECT_TRUE(FlateEncode(data.input, data.input_size, &buf, &buf_size));
ASSERT_TRUE(buf);
EXPECT_EQ(std::string((const char*)data.expected, data.expected_size),
std::string((const char*)buf, buf_size))
<< " for case " << i;
FX_Free(buf);
}
}
TEST_F(FPDFParserDecodeEmbeddertest, FlateDecode) {
pdfium::DecodeTestData flate_decode_cases[] = {
STR_IN_OUT_CASE("", "", 0),
STR_IN_OUT_CASE("preposterous nonsense", "", 2),
STR_IN_OUT_CASE("\x78\x9c\x03\x00\x00\x00\x00\x01", "", 8),
STR_IN_OUT_CASE("\x78\x9c\x53\x00\x00\x00\x21\x00\x21", " ", 9),
STR_IN_OUT_CASE("\x78\x9c\x33\x34\x32\x06\x00\01\x2d\x00\x97", "123", 11),
STR_IN_OUT_CASE("\x78\x9c\x63\xf8\x0f\x00\x01\x01\x01\x00", "\x00\xff",
10),
STR_IN_OUT_CASE(
"\x78\x9c\x33\x54\x30\x00\x42\x5d\x43\x05\x23\x4b\x05\x73\x33\x63"
"\x85\xe4\x5c\x2e\x90\x80\xa9\xa9\xa9\x82\xb9\xb1\xa9\x42\x51\x2a"
"\x57\xb8\x42\x1e\x57\x21\x92\xa0\x89\x9e\xb1\xa5\x09\x92\x84\x9e"
"\x85\x81\x81\x25\xd8\x14\x24\x26\xd0\x18\x43\x05\x10\x0c\x72\x57"
"\x80\x30\x8a\xd2\xb9\xf4\xdd\x0d\x14\xd2\x8b\xc1\x46\x99\x59\x1a"
"\x2b\x58\x1a\x9a\x83\x8c\x49\xe3\x0a\x04\x42\x00\x37\x4c\x1b\x42",
"1 0 0 -1 29 763 cm\n0 0 555 735 re\nW n\nq\n0 0 555 734.394 re\n"
"W n\nq\n0.8009 0 0 0.8009 0 0 cm\n1 1 1 RG 1 1 1 rg\n/G0 gs\n"
"0 0 693 917 re\nf\nQ\nQ\n",
96),
};
for (size_t i = 0; i < FX_ArraySize(flate_decode_cases); ++i) {
const pdfium::DecodeTestData& data = flate_decode_cases[i];
unsigned char* result = nullptr;
unsigned int result_size;
EXPECT_EQ(data.processed_size,
FlateDecode(data.input, data.input_size, result, result_size))
<< " for case " << i;
ASSERT_TRUE(result);
EXPECT_EQ(std::string((const char*)data.expected, data.expected_size),
std::string((const char*)result, result_size))
<< " for case " << i;
FX_Free(result);
}
}
TEST_F(FPDFParserDecodeEmbeddertest, Bug_552046) {
// Tests specifying multiple image filters for a stream. Should not cause a
// crash when rendered.
EXPECT_TRUE(OpenDocument("bug_552046.pdf"));
FPDF_PAGE page = LoadPage(0);
FPDF_BITMAP bitmap = RenderPage(page);
FPDFBitmap_Destroy(bitmap);
UnloadPage(page);
}
TEST_F(FPDFParserDecodeEmbeddertest, Bug_555784) {
// Tests bad input to the run length decoder that caused a heap overflow.
// Should not cause a crash when rendered.
EXPECT_TRUE(OpenDocument("bug_555784.pdf"));
FPDF_PAGE page = LoadPage(0);
FPDF_BITMAP bitmap = RenderPage(page);
FPDFBitmap_Destroy(bitmap);
UnloadPage(page);
}
TEST_F(FPDFParserDecodeEmbeddertest, Bug_455199) {
// Tests object numbers with a value > 01000000.
// Should open successfully.
EXPECT_TRUE(OpenDocument("bug_455199.pdf"));
FPDF_PAGE page = LoadPage(0);
FPDF_BITMAP bitmap = RenderPage(page);
FPDFBitmap_Destroy(bitmap);
UnloadPage(page);
}
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