chrome/browser/safe_browsing/binary_feature_extractor_win_unittest.cc

   1 // Copyright 2014 The Chromium 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 "chrome/browser/safe_browsing/binary_feature_extractor.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/base_paths.h"
  11 #include "base/files/file_path.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/path_service.h"
  14 #include "chrome/common/chrome_paths.h"
  15 #include "chrome/common/safe_browsing/csd.pb.h"
  16 #include "net/cert/x509_cert_types.h"
  17 #include "net/cert/x509_certificate.h"
  18 #include "testing/gtest/include/gtest/gtest.h"
  19
  20 namespace safe_browsing {
  21
  22 class BinaryFeatureExtractorWinTest : public testing::Test {
  23  protected:
  24   virtual void SetUp() override {
  25     base::FilePath source_path;
  26     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &source_path));
  27     testdata_path_ = source_path
  28         .AppendASCII("safe_browsing")
  29         .AppendASCII("download_protection");
  30
  31     binary_feature_extractor_ = new BinaryFeatureExtractor();
  32   }
  33
  34   // Given a certificate chain protobuf, parse it into X509Certificates.
  35   void ParseCertificateChain(
  36       const ClientDownloadRequest_CertificateChain& chain,
  37       std::vector<scoped_refptr<net::X509Certificate> >* certs) {
  38     for (int i = 0; i < chain.element_size(); ++i) {
  39       certs->push_back(
  40           net::X509Certificate::CreateFromBytes(
  41               chain.element(i).certificate().data(),
  42               chain.element(i).certificate().size()));
  43     }
  44   }
  45
  46   base::FilePath testdata_path_;
  47   scoped_refptr<BinaryFeatureExtractor> binary_feature_extractor_;
  48 };
  49
  50 TEST_F(BinaryFeatureExtractorWinTest, UntrustedSignedBinary) {
  51   // signed.exe is signed by an untrusted root CA.
  52   ClientDownloadRequest_SignatureInfo signature_info;
  53   binary_feature_extractor_->CheckSignature(
  54       testdata_path_.Append(L"signed.exe"),
  55       &signature_info);
  56   ASSERT_EQ(1, signature_info.certificate_chain_size());
  57   std::vector<scoped_refptr<net::X509Certificate> > certs;
  58   ParseCertificateChain(signature_info.certificate_chain(0), &certs);
  59   ASSERT_EQ(2, certs.size());
  60   EXPECT_EQ("Joe's-Software-Emporium", certs[0]->subject().common_name);
  61   EXPECT_EQ("Root Agency", certs[1]->subject().common_name);
  62
  63   EXPECT_TRUE(signature_info.has_trusted());
  64   EXPECT_FALSE(signature_info.trusted());
  65 }
  66
  67 TEST_F(BinaryFeatureExtractorWinTest, TrustedBinary) {
  68   // wow_helper.exe is signed using Google's signing certifiacte.
  69   ClientDownloadRequest_SignatureInfo signature_info;
  70   binary_feature_extractor_->CheckSignature(
  71       testdata_path_.Append(L"wow_helper.exe"),
  72       &signature_info);
  73   ASSERT_EQ(1, signature_info.certificate_chain_size());
  74   std::vector<scoped_refptr<net::X509Certificate> > certs;
  75   ParseCertificateChain(signature_info.certificate_chain(0), &certs);
  76   ASSERT_EQ(3, certs.size());
  77
  78   EXPECT_EQ("Google Inc", certs[0]->subject().common_name);
  79   EXPECT_EQ("VeriSign Class 3 Code Signing 2009-2 CA",
  80             certs[1]->subject().common_name);
  81   EXPECT_EQ("Class 3 Public Primary Certification Authority",
  82             certs[2]->subject().organization_unit_names[0]);
  83
  84   EXPECT_TRUE(signature_info.trusted());
  85 }
  86
  87 TEST_F(BinaryFeatureExtractorWinTest, UnsignedBinary) {
  88   // unsigned.exe has no signature information.
  89   ClientDownloadRequest_SignatureInfo signature_info;
  90   binary_feature_extractor_->CheckSignature(
  91       testdata_path_.Append(L"unsigned.exe"),
  92       &signature_info);
  93   EXPECT_EQ(0, signature_info.certificate_chain_size());
  94   EXPECT_FALSE(signature_info.has_trusted());
  95 }
  96
  97 TEST_F(BinaryFeatureExtractorWinTest, NonExistentBinary) {
  98   // Test a file that doesn't exist.
  99   ClientDownloadRequest_SignatureInfo signature_info;
 100   binary_feature_extractor_->CheckSignature(
 101       testdata_path_.Append(L"doesnotexist.exe"),
 102       &signature_info);
 103   EXPECT_EQ(0, signature_info.certificate_chain_size());
 104   EXPECT_FALSE(signature_info.has_trusted());
 105 }
 106
 107 TEST_F(BinaryFeatureExtractorWinTest, ExtractImageHeadersNoFile) {
 108   // Test extracting headers from a file that doesn't exist.
 109   ClientDownloadRequest_ImageHeaders image_headers;
 110   binary_feature_extractor_->ExtractImageHeaders(
 111       testdata_path_.AppendASCII("this_file_does_not_exist"),
 112       &image_headers);
 113   EXPECT_FALSE(image_headers.has_pe_headers());
 114 }
 115
 116 TEST_F(BinaryFeatureExtractorWinTest, ExtractImageHeadersNonImage) {
 117   // Test extracting headers from something that is not a PE image.
 118   ClientDownloadRequest_ImageHeaders image_headers;
 119   binary_feature_extractor_->ExtractImageHeaders(
 120       testdata_path_.AppendASCII("simple_exe.cc"),
 121       &image_headers);
 122   EXPECT_FALSE(image_headers.has_pe_headers());
 123 }
 124
 125 TEST_F(BinaryFeatureExtractorWinTest, ExtractImageHeaders) {
 126   // Test extracting headers from something that is a PE image.
 127   ClientDownloadRequest_ImageHeaders image_headers;
 128   binary_feature_extractor_->ExtractImageHeaders(
 129       testdata_path_.AppendASCII("unsigned.exe"),
 130       &image_headers);
 131   EXPECT_TRUE(image_headers.has_pe_headers());
 132   const ClientDownloadRequest_PEImageHeaders& pe_headers =
 133       image_headers.pe_headers();
 134   EXPECT_TRUE(pe_headers.has_dos_header());
 135   EXPECT_TRUE(pe_headers.has_file_header());
 136   EXPECT_TRUE(pe_headers.has_optional_headers32());
 137   EXPECT_FALSE(pe_headers.has_optional_headers64());
 138   EXPECT_NE(0, pe_headers.section_header_size());
 139   EXPECT_FALSE(pe_headers.has_export_section_data());
 140   EXPECT_EQ(0, pe_headers.debug_data_size());
 141 }
 142
 143 TEST_F(BinaryFeatureExtractorWinTest, ExtractImageHeadersWithDebugData) {
 144   // Test extracting headers from something that is a PE image with debug data.
 145   ClientDownloadRequest_ImageHeaders image_headers;
 146   binary_feature_extractor_->ExtractImageHeaders(
 147       testdata_path_.DirName().AppendASCII("module_with_exports_x86.dll"),
 148       &image_headers);
 149   EXPECT_TRUE(image_headers.has_pe_headers());
 150   const ClientDownloadRequest_PEImageHeaders& pe_headers =
 151       image_headers.pe_headers();
 152   EXPECT_TRUE(pe_headers.has_dos_header());
 153   EXPECT_TRUE(pe_headers.has_file_header());
 154   EXPECT_TRUE(pe_headers.has_optional_headers32());
 155   EXPECT_FALSE(pe_headers.has_optional_headers64());
 156   EXPECT_NE(0, pe_headers.section_header_size());
 157   EXPECT_TRUE(pe_headers.has_export_section_data());
 158   EXPECT_EQ(1U, pe_headers.debug_data_size());
 159 }
 160
 161 }  // namespace safe_browsing