| // Copyright 2014 The Chromium 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 "chrome/common/safe_browsing/binary_feature_extractor.h" |
| |
| #include "base/base_paths.h" |
| #include "base/files/file.h" |
| #include "base/files/scoped_temp_dir.h" |
| #include "base/path_service.h" |
| #include "chrome/common/safe_browsing/csd.pb.h" |
| #include "crypto/sha2.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace safe_browsing { |
| |
| class BinaryFeatureExtractorTest : public testing::Test { |
| protected: |
| BinaryFeatureExtractorTest() : extractor_(new BinaryFeatureExtractor()) {} |
| |
| void SetUp() override { |
| ASSERT_TRUE(temp_dir_.CreateUniqueTempDir()); |
| path_ = temp_dir_.path().Append(FILE_PATH_LITERAL("file.dll")); |
| } |
| |
| // Writes |size| bytes from |data| to |path_|. |
| void WriteFileToHash(const char* data, int size) { |
| base::File file(path_, base::File::FLAG_CREATE | base::File::FLAG_WRITE); |
| ASSERT_TRUE(file.IsValid()); |
| ASSERT_EQ(size, file.WriteAtCurrentPos(data, size)); |
| } |
| |
| // Verifies that |path_| hashes to |digest|. |
| void ExpectFileDigestEq(const uint8_t* digest) { |
| ClientDownloadRequest_Digests digests; |
| extractor_->ExtractDigest(path_, &digests); |
| EXPECT_TRUE(digests.has_sha256()); |
| EXPECT_EQ(std::string(reinterpret_cast<const char*>(digest), |
| crypto::kSHA256Length), |
| digests.sha256()); |
| } |
| |
| static const int kBlockSize = 1 << 12; |
| scoped_refptr<BinaryFeatureExtractor> extractor_; |
| base::ScopedTempDir temp_dir_; |
| |
| // The path to a file that may be hashed. |
| base::FilePath path_; |
| }; |
| |
| TEST_F(BinaryFeatureExtractorTest, ExtractDigestNoFile) { |
| base::FilePath no_file = |
| temp_dir_.path().Append(FILE_PATH_LITERAL("does_not_exist.dll")); |
| |
| ClientDownloadRequest_Digests digests; |
| extractor_->ExtractDigest(no_file, &digests); |
| EXPECT_FALSE(digests.has_sha256()); |
| } |
| |
| // Hash a file that is less than 1 4k block. |
| TEST_F(BinaryFeatureExtractorTest, ExtractSmallDigest) { |
| static const uint8_t kDigest[] = { |
| 0x70, 0x27, 0x7b, 0xad, 0xfc, 0xb9, 0x97, 0x6b, 0x24, 0xf9, 0x80, |
| 0x22, 0x26, 0x2c, 0x31, 0xea, 0x8f, 0xb2, 0x1f, 0x54, 0x93, 0x6b, |
| 0x69, 0x8b, 0x5d, 0x54, 0xd4, 0xd4, 0x21, 0x0b, 0x98, 0xb7}; |
| |
| static const char kFileData[] = {"The mountains are robotic."}; |
| static const int kDataLen = sizeof(kFileData) - 1; |
| WriteFileToHash(kFileData, kDataLen); |
| ExpectFileDigestEq(kDigest); |
| } |
| |
| // Hash a file that is exactly 1 4k block. |
| TEST_F(BinaryFeatureExtractorTest, ExtractOneBlockDigest) { |
| static const uint8_t kDigest[] = { |
| 0x4f, 0x93, 0x6e, 0xee, 0x89, 0x55, 0xa5, 0xe7, 0x46, 0xd0, 0x61, |
| 0x43, 0x54, 0x5f, 0x33, 0x7b, 0xdc, 0x30, 0x3a, 0x4b, 0x18, 0xb4, |
| 0x82, 0x20, 0xe3, 0x93, 0x4c, 0x65, 0xe0, 0xc1, 0xc0, 0x19}; |
| |
| const int kDataLen = kBlockSize; |
| scoped_ptr<char[]> data(new char[kDataLen]); |
| memset(data.get(), 71, kDataLen); |
| WriteFileToHash(data.get(), kDataLen); |
| ExpectFileDigestEq(kDigest); |
| } |
| |
| // Hash a file that is larger than 1 4k block. |
| TEST_F(BinaryFeatureExtractorTest, ExtractBigBlockDigest) { |
| static const uint8_t kDigest[] = { |
| 0xda, 0xae, 0xa0, 0xd5, 0x3b, 0xce, 0x0b, 0x4e, 0x5f, 0x5d, 0x0b, |
| 0xc7, 0x6a, 0x69, 0x0e, 0xf1, 0x8b, 0x2d, 0x20, 0xcd, 0xf2, 0x6d, |
| 0x33, 0xa7, 0x70, 0xf3, 0x6b, 0x85, 0xbf, 0xce, 0x9d, 0x5c}; |
| |
| const int kDataLen = kBlockSize + 1; |
| scoped_ptr<char[]> data(new char[kDataLen]); |
| memset(data.get(), 71, kDataLen); |
| WriteFileToHash(data.get(), kDataLen); |
| ExpectFileDigestEq(kDigest); |
| } |
| |
| } // namespace safe_browsing |