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| 1 // Copyright (c) 2012 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/prefix_set.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 #include <iterator> | |
| 9 #include <set> | |
| 10 #include <string> | |
| 11 | |
| 12 #include "base/files/file_util.h" | |
| 13 #include "base/files/scoped_file.h" | |
| 14 #include "base/files/scoped_temp_dir.h" | |
| 15 #include "base/logging.h" | |
| 16 #include "base/md5.h" | |
| 17 #include "base/memory/scoped_ptr.h" | |
| 18 #include "base/path_service.h" | |
| 19 #include "base/rand_util.h" | |
| 20 #include "base/strings/string_number_conversions.h" | |
| 21 #include "base/strings/string_util.h" | |
| 22 #include "chrome/common/chrome_paths.h" | |
| 23 #include "testing/gtest/include/gtest/gtest.h" | |
| 24 #include "testing/platform_test.h" | |
| 25 | |
| 26 namespace { | |
| 27 | |
| 28 const SBPrefix kHighBitClear = 1000u * 1000u * 1000u; | |
| 29 const SBPrefix kHighBitSet = 3u * 1000u * 1000u * 1000u; | |
| 30 | |
| 31 } // namespace | |
| 32 | |
| 33 namespace safe_browsing { | |
| 34 | |
| 35 class PrefixSetTest : public PlatformTest { | |
| 36 protected: | |
| 37 // Constants for the v1 format. | |
| 38 static const size_t kMagicOffset = 0 * sizeof(uint32); | |
| 39 static const size_t kVersionOffset = 1 * sizeof(uint32); | |
| 40 static const size_t kIndexSizeOffset = 2 * sizeof(uint32); | |
| 41 static const size_t kDeltasSizeOffset = 3 * sizeof(uint32); | |
| 42 static const size_t kFullHashesSizeOffset = 4 * sizeof(uint32); | |
| 43 static const size_t kPayloadOffset = 5 * sizeof(uint32); | |
| 44 | |
| 45 // Generate a set of random prefixes to share between tests. For | |
| 46 // most tests this generation was a large fraction of the test time. | |
| 47 // | |
| 48 // The set should contain sparse areas where adjacent items are more | |
| 49 // than 2^16 apart, and dense areas where adjacent items are less | |
| 50 // than 2^16 apart. | |
| 51 static void SetUpTestCase() { | |
| 52 // Distribute clusters of prefixes. | |
| 53 for (size_t i = 0; i < 250; ++i) { | |
| 54 // Unsigned for overflow characteristics. | |
| 55 const uint32 base = static_cast<uint32>(base::RandUint64()); | |
| 56 for (size_t j = 0; j < 10; ++j) { | |
| 57 const uint32 delta = static_cast<uint32>(base::RandUint64() & 0xFFFF); | |
| 58 const SBPrefix prefix = static_cast<SBPrefix>(base + delta); | |
| 59 shared_prefixes_.push_back(prefix); | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 // Lay down a sparsely-distributed layer. | |
| 64 const size_t count = shared_prefixes_.size(); | |
| 65 for (size_t i = 0; i < count; ++i) { | |
| 66 const SBPrefix prefix = static_cast<SBPrefix>(base::RandUint64()); | |
| 67 shared_prefixes_.push_back(prefix); | |
| 68 } | |
| 69 | |
| 70 // Sort for use with PrefixSet constructor. | |
| 71 std::sort(shared_prefixes_.begin(), shared_prefixes_.end()); | |
| 72 } | |
| 73 | |
| 74 // Check that all elements of |prefixes| are in |prefix_set|, and | |
| 75 // that nearby elements are not (for lack of a more sensible set of | |
| 76 // items to check for absence). | |
| 77 static void CheckPrefixes(const PrefixSet& prefix_set, | |
| 78 const std::vector<SBPrefix> &prefixes) { | |
| 79 // The set can generate the prefixes it believes it has, so that's | |
| 80 // a good starting point. | |
| 81 std::set<SBPrefix> check(prefixes.begin(), prefixes.end()); | |
| 82 std::vector<SBPrefix> prefixes_copy; | |
| 83 prefix_set.GetPrefixes(&prefixes_copy); | |
| 84 EXPECT_EQ(prefixes_copy.size(), check.size()); | |
| 85 EXPECT_TRUE(std::equal(check.begin(), check.end(), prefixes_copy.begin())); | |
| 86 | |
| 87 for (size_t i = 0; i < prefixes.size(); ++i) { | |
| 88 EXPECT_TRUE(prefix_set.PrefixExists(prefixes[i])); | |
| 89 | |
| 90 const SBPrefix left_sibling = prefixes[i] - 1; | |
| 91 if (check.count(left_sibling) == 0) | |
| 92 EXPECT_FALSE(prefix_set.PrefixExists(left_sibling)); | |
| 93 | |
| 94 const SBPrefix right_sibling = prefixes[i] + 1; | |
| 95 if (check.count(right_sibling) == 0) | |
| 96 EXPECT_FALSE(prefix_set.PrefixExists(right_sibling)); | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 // Generate a |PrefixSet| file from |shared_prefixes_|, store it in | |
| 101 // a temporary file, and return the filename in |filenamep|. | |
| 102 // Returns |true| on success. | |
| 103 bool GetPrefixSetFile(base::FilePath* filenamep) { | |
| 104 if (!temp_dir_.IsValid() && !temp_dir_.CreateUniqueTempDir()) | |
| 105 return false; | |
| 106 | |
| 107 base::FilePath filename = temp_dir_.path().AppendASCII("PrefixSetTest"); | |
| 108 | |
| 109 PrefixSetBuilder builder(shared_prefixes_); | |
| 110 if (!builder.GetPrefixSetNoHashes()->WriteFile(filename)) | |
| 111 return false; | |
| 112 | |
| 113 *filenamep = filename; | |
| 114 return true; | |
| 115 } | |
| 116 | |
| 117 // Helper function to read the uint32 value at |offset|, increment it | |
| 118 // by |inc|, and write it back in place. |fp| should be opened in | |
| 119 // r+ mode. | |
| 120 static void IncrementIntAt(FILE* fp, long offset, int inc) { | |
| 121 uint32 value = 0; | |
| 122 | |
| 123 ASSERT_NE(-1, fseek(fp, offset, SEEK_SET)); | |
| 124 ASSERT_EQ(1U, fread(&value, sizeof(value), 1, fp)); | |
| 125 | |
| 126 value += inc; | |
| 127 | |
| 128 ASSERT_NE(-1, fseek(fp, offset, SEEK_SET)); | |
| 129 ASSERT_EQ(1U, fwrite(&value, sizeof(value), 1, fp)); | |
| 130 } | |
| 131 | |
| 132 // Helper function to re-generated |fp|'s checksum to be correct for | |
| 133 // the file's contents. |fp| should be opened in r+ mode. | |
| 134 static void CleanChecksum(FILE* fp) { | |
| 135 base::MD5Context context; | |
| 136 base::MD5Init(&context); | |
| 137 | |
| 138 ASSERT_NE(-1, fseek(fp, 0, SEEK_END)); | |
| 139 long file_size = ftell(fp); | |
| 140 | |
| 141 using base::MD5Digest; | |
| 142 size_t payload_size = static_cast<size_t>(file_size) - sizeof(MD5Digest); | |
| 143 size_t digested_size = 0; | |
| 144 ASSERT_NE(-1, fseek(fp, 0, SEEK_SET)); | |
| 145 while (digested_size < payload_size) { | |
| 146 char buf[1024]; | |
| 147 size_t nitems = std::min(payload_size - digested_size, sizeof(buf)); | |
| 148 ASSERT_EQ(nitems, fread(buf, 1, nitems, fp)); | |
| 149 base::MD5Update(&context, base::StringPiece(buf, nitems)); | |
| 150 digested_size += nitems; | |
| 151 } | |
| 152 ASSERT_EQ(digested_size, payload_size); | |
| 153 ASSERT_EQ(static_cast<long>(digested_size), ftell(fp)); | |
| 154 | |
| 155 base::MD5Digest new_digest; | |
| 156 base::MD5Final(&new_digest, &context); | |
| 157 ASSERT_NE(-1, fseek(fp, digested_size, SEEK_SET)); | |
| 158 ASSERT_EQ(1U, fwrite(&new_digest, sizeof(new_digest), 1, fp)); | |
| 159 ASSERT_EQ(file_size, ftell(fp)); | |
| 160 } | |
| 161 | |
| 162 // Open |filename| and increment the uint32 at |offset| by |inc|. | |
| 163 // Then re-generate the checksum to account for the new contents. | |
| 164 void ModifyAndCleanChecksum(const base::FilePath& filename, long offset, | |
| 165 int inc) { | |
| 166 int64 size_64; | |
| 167 ASSERT_TRUE(base::GetFileSize(filename, &size_64)); | |
| 168 | |
| 169 base::ScopedFILE file(base::OpenFile(filename, "r+b")); | |
| 170 IncrementIntAt(file.get(), offset, inc); | |
| 171 CleanChecksum(file.get()); | |
| 172 file.reset(); | |
| 173 | |
| 174 int64 new_size_64; | |
| 175 ASSERT_TRUE(base::GetFileSize(filename, &new_size_64)); | |
| 176 ASSERT_EQ(new_size_64, size_64); | |
| 177 } | |
| 178 | |
| 179 // Fill |prefixes| with values read from a reference file. The reference file | |
| 180 // was generated from a specific |shared_prefixes_|. | |
| 181 bool ReadReferencePrefixes(std::vector<SBPrefix>* prefixes) { | |
| 182 const char kRefname[] = "PrefixSetRef"; | |
| 183 base::FilePath ref_path; | |
| 184 if (!PathService::Get(chrome::DIR_TEST_DATA, &ref_path)) | |
| 185 return false; | |
| 186 ref_path = ref_path.AppendASCII("SafeBrowsing"); | |
| 187 ref_path = ref_path.AppendASCII(kRefname); | |
| 188 | |
| 189 base::ScopedFILE file(base::OpenFile(ref_path, "r")); | |
| 190 if (!file.get()) | |
| 191 return false; | |
| 192 char buf[1024]; | |
| 193 while (fgets(buf, sizeof(buf), file.get())) { | |
| 194 std::string trimmed; | |
| 195 if (base::TRIM_TRAILING != | |
| 196 base::TrimWhitespace(buf, base::TRIM_ALL, &trimmed)) | |
| 197 return false; | |
| 198 unsigned prefix; | |
| 199 if (!base::StringToUint(trimmed, &prefix)) | |
| 200 return false; | |
| 201 prefixes->push_back(prefix); | |
| 202 } | |
| 203 return true; | |
| 204 } | |
| 205 | |
| 206 // Tests should not modify this shared resource. | |
| 207 static std::vector<SBPrefix> shared_prefixes_; | |
| 208 | |
| 209 base::ScopedTempDir temp_dir_; | |
| 210 }; | |
| 211 | |
| 212 std::vector<SBPrefix> PrefixSetTest::shared_prefixes_; | |
| 213 | |
| 214 // Test that a small sparse random input works. | |
| 215 TEST_F(PrefixSetTest, Baseline) { | |
| 216 PrefixSetBuilder builder(shared_prefixes_); | |
| 217 CheckPrefixes(*builder.GetPrefixSetNoHashes(), shared_prefixes_); | |
| 218 } | |
| 219 | |
| 220 // Test that the empty set doesn't appear to have anything in it. | |
| 221 TEST_F(PrefixSetTest, Empty) { | |
| 222 const std::vector<SBPrefix> empty; | |
| 223 PrefixSetBuilder builder(empty); | |
| 224 scoped_ptr<const PrefixSet> prefix_set = builder.GetPrefixSetNoHashes(); | |
| 225 for (size_t i = 0; i < shared_prefixes_.size(); ++i) { | |
| 226 EXPECT_FALSE(prefix_set->PrefixExists(shared_prefixes_[i])); | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 // Single-element set should work fine. | |
| 231 TEST_F(PrefixSetTest, OneElement) { | |
| 232 const std::vector<SBPrefix> prefixes(100, 0u); | |
| 233 PrefixSetBuilder builder(prefixes); | |
| 234 scoped_ptr<const PrefixSet> prefix_set = builder.GetPrefixSetNoHashes(); | |
| 235 EXPECT_FALSE(prefix_set->PrefixExists(static_cast<SBPrefix>(-1))); | |
| 236 EXPECT_TRUE(prefix_set->PrefixExists(prefixes[0])); | |
| 237 EXPECT_FALSE(prefix_set->PrefixExists(1u)); | |
| 238 | |
| 239 // Check that |GetPrefixes()| returns the same set of prefixes as | |
| 240 // was passed in. | |
| 241 std::vector<SBPrefix> prefixes_copy; | |
| 242 prefix_set->GetPrefixes(&prefixes_copy); | |
| 243 EXPECT_EQ(1U, prefixes_copy.size()); | |
| 244 EXPECT_EQ(prefixes[0], prefixes_copy[0]); | |
| 245 } | |
| 246 | |
| 247 // Edges of the 32-bit integer range. | |
| 248 TEST_F(PrefixSetTest, IntMinMax) { | |
| 249 std::vector<SBPrefix> prefixes; | |
| 250 | |
| 251 // Using bit patterns rather than portable constants because this | |
| 252 // really is testing how the entire 32-bit integer range is handled. | |
| 253 prefixes.push_back(0x00000000); | |
| 254 prefixes.push_back(0x0000FFFF); | |
| 255 prefixes.push_back(0x7FFF0000); | |
| 256 prefixes.push_back(0x7FFFFFFF); | |
| 257 prefixes.push_back(0x80000000); | |
| 258 prefixes.push_back(0x8000FFFF); | |
| 259 prefixes.push_back(0xFFFF0000); | |
| 260 prefixes.push_back(0xFFFFFFFF); | |
| 261 | |
| 262 std::sort(prefixes.begin(), prefixes.end()); | |
| 263 PrefixSetBuilder builder(prefixes); | |
| 264 scoped_ptr<const PrefixSet> prefix_set = builder.GetPrefixSetNoHashes(); | |
| 265 | |
| 266 // Check that |GetPrefixes()| returns the same set of prefixes as | |
| 267 // was passed in. | |
| 268 std::vector<SBPrefix> prefixes_copy; | |
| 269 prefix_set->GetPrefixes(&prefixes_copy); | |
| 270 ASSERT_EQ(prefixes_copy.size(), prefixes.size()); | |
| 271 EXPECT_TRUE(std::equal(prefixes.begin(), prefixes.end(), | |
| 272 prefixes_copy.begin())); | |
| 273 } | |
| 274 | |
| 275 // A range with only large deltas. | |
| 276 TEST_F(PrefixSetTest, AllBig) { | |
| 277 std::vector<SBPrefix> prefixes; | |
| 278 | |
| 279 const unsigned kDelta = 10 * 1000 * 1000; | |
| 280 for (SBPrefix prefix = kHighBitClear; | |
| 281 prefix < kHighBitSet; prefix += kDelta) { | |
| 282 prefixes.push_back(prefix); | |
| 283 } | |
| 284 | |
| 285 std::sort(prefixes.begin(), prefixes.end()); | |
| 286 PrefixSetBuilder builder(prefixes); | |
| 287 scoped_ptr<const PrefixSet> prefix_set = builder.GetPrefixSetNoHashes(); | |
| 288 | |
| 289 // Check that |GetPrefixes()| returns the same set of prefixes as | |
| 290 // was passed in. | |
| 291 std::vector<SBPrefix> prefixes_copy; | |
| 292 prefix_set->GetPrefixes(&prefixes_copy); | |
| 293 prefixes.erase(std::unique(prefixes.begin(), prefixes.end()), prefixes.end()); | |
| 294 EXPECT_EQ(prefixes_copy.size(), prefixes.size()); | |
| 295 EXPECT_TRUE(std::equal(prefixes.begin(), prefixes.end(), | |
| 296 prefixes_copy.begin())); | |
| 297 } | |
| 298 | |
| 299 // Use artificial inputs to test various edge cases in PrefixExists(). Items | |
| 300 // before the lowest item aren't present. Items after the largest item aren't | |
| 301 // present. Create a sequence of items with deltas above and below 2^16, and | |
| 302 // make sure they're all present. Create a very long sequence with deltas below | |
| 303 // 2^16 to test crossing |kMaxRun|. | |
| 304 TEST_F(PrefixSetTest, EdgeCases) { | |
| 305 std::vector<SBPrefix> prefixes; | |
| 306 | |
| 307 // Put in a high-bit prefix. | |
| 308 SBPrefix prefix = kHighBitSet; | |
| 309 prefixes.push_back(prefix); | |
| 310 | |
| 311 // Add a sequence with very large deltas. | |
| 312 unsigned delta = 100 * 1000 * 1000; | |
| 313 for (int i = 0; i < 10; ++i) { | |
| 314 prefix += delta; | |
| 315 prefixes.push_back(prefix); | |
| 316 } | |
| 317 | |
| 318 // Add a sequence with deltas that start out smaller than the | |
| 319 // maximum delta, and end up larger. Also include some duplicates. | |
| 320 delta = 256 * 256 - 100; | |
| 321 for (int i = 0; i < 200; ++i) { | |
| 322 prefix += delta; | |
| 323 prefixes.push_back(prefix); | |
| 324 prefixes.push_back(prefix); | |
| 325 delta++; | |
| 326 } | |
| 327 | |
| 328 // Add a long sequence with deltas smaller than the maximum delta, | |
| 329 // so a new index item will be injected. | |
| 330 delta = 256 * 256 - 1; | |
| 331 prefix = kHighBitClear - delta * 1000; | |
| 332 prefixes.push_back(prefix); | |
| 333 for (int i = 0; i < 1000; ++i) { | |
| 334 prefix += delta; | |
| 335 prefixes.push_back(prefix); | |
| 336 delta--; | |
| 337 } | |
| 338 | |
| 339 std::sort(prefixes.begin(), prefixes.end()); | |
| 340 PrefixSetBuilder builder(prefixes); | |
| 341 scoped_ptr<const PrefixSet> prefix_set = builder.GetPrefixSetNoHashes(); | |
| 342 | |
| 343 // Check that |GetPrefixes()| returns the same set of prefixes as | |
| 344 // was passed in. | |
| 345 std::vector<SBPrefix> prefixes_copy; | |
| 346 prefix_set->GetPrefixes(&prefixes_copy); | |
| 347 prefixes.erase(std::unique(prefixes.begin(), prefixes.end()), prefixes.end()); | |
| 348 EXPECT_EQ(prefixes_copy.size(), prefixes.size()); | |
| 349 EXPECT_TRUE(std::equal(prefixes.begin(), prefixes.end(), | |
| 350 prefixes_copy.begin())); | |
| 351 | |
| 352 // Items before and after the set are not present, and don't crash. | |
| 353 EXPECT_FALSE(prefix_set->PrefixExists(kHighBitSet - 100)); | |
| 354 EXPECT_FALSE(prefix_set->PrefixExists(kHighBitClear + 100)); | |
| 355 | |
| 356 // Check that the set correctly flags all of the inputs, and also | |
| 357 // check items just above and below the inputs to make sure they | |
| 358 // aren't present. | |
| 359 for (size_t i = 0; i < prefixes.size(); ++i) { | |
| 360 EXPECT_TRUE(prefix_set->PrefixExists(prefixes[i])); | |
| 361 | |
| 362 EXPECT_FALSE(prefix_set->PrefixExists(prefixes[i] - 1)); | |
| 363 EXPECT_FALSE(prefix_set->PrefixExists(prefixes[i] + 1)); | |
| 364 } | |
| 365 } | |
| 366 | |
| 367 // Test writing a prefix set to disk and reading it back in. | |
| 368 TEST_F(PrefixSetTest, ReadWrite) { | |
| 369 base::FilePath filename; | |
| 370 | |
| 371 // Write the sample prefix set out, read it back in, and check all | |
| 372 // the prefixes. Leaves the path in |filename|. | |
| 373 { | |
| 374 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 375 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 376 ASSERT_TRUE(prefix_set.get()); | |
| 377 CheckPrefixes(*prefix_set, shared_prefixes_); | |
| 378 } | |
| 379 | |
| 380 // Test writing and reading a very sparse set containing no deltas. | |
| 381 { | |
| 382 std::vector<SBPrefix> prefixes; | |
| 383 prefixes.push_back(kHighBitClear); | |
| 384 prefixes.push_back(kHighBitSet); | |
| 385 | |
| 386 PrefixSetBuilder builder(prefixes); | |
| 387 ASSERT_TRUE(builder.GetPrefixSetNoHashes()->WriteFile(filename)); | |
| 388 | |
| 389 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 390 ASSERT_TRUE(prefix_set.get()); | |
| 391 CheckPrefixes(*prefix_set, prefixes); | |
| 392 } | |
| 393 | |
| 394 // Test writing and reading an empty set. | |
| 395 { | |
| 396 std::vector<SBPrefix> prefixes; | |
| 397 PrefixSetBuilder builder(prefixes); | |
| 398 ASSERT_TRUE(builder.GetPrefixSetNoHashes()->WriteFile(filename)); | |
| 399 | |
| 400 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 401 ASSERT_TRUE(prefix_set.get()); | |
| 402 CheckPrefixes(*prefix_set, prefixes); | |
| 403 } | |
| 404 | |
| 405 // Test that full hashes are persisted. | |
| 406 { | |
| 407 std::vector<SBFullHash> hashes; | |
| 408 hashes.push_back(SBFullHashForString("one")); | |
| 409 hashes.push_back(SBFullHashForString("two")); | |
| 410 hashes.push_back(SBFullHashForString("three")); | |
| 411 | |
| 412 std::vector<SBPrefix> prefixes(shared_prefixes_); | |
| 413 | |
| 414 // Remove any collisions from the prefixes. | |
| 415 for (size_t i = 0; i < hashes.size(); ++i) { | |
| 416 std::vector<SBPrefix>::iterator iter = | |
| 417 std::lower_bound(prefixes.begin(), prefixes.end(), hashes[i].prefix); | |
| 418 if (iter != prefixes.end() && *iter == hashes[i].prefix) | |
| 419 prefixes.erase(iter); | |
| 420 } | |
| 421 | |
| 422 PrefixSetBuilder builder(prefixes); | |
| 423 ASSERT_TRUE(builder.GetPrefixSet(hashes)->WriteFile(filename)); | |
| 424 | |
| 425 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 426 ASSERT_TRUE(prefix_set.get()); | |
| 427 CheckPrefixes(*prefix_set, prefixes); | |
| 428 | |
| 429 EXPECT_TRUE(prefix_set->Exists(hashes[0])); | |
| 430 EXPECT_TRUE(prefix_set->Exists(hashes[1])); | |
| 431 EXPECT_TRUE(prefix_set->Exists(hashes[2])); | |
| 432 EXPECT_FALSE(prefix_set->PrefixExists(hashes[0].prefix)); | |
| 433 EXPECT_FALSE(prefix_set->PrefixExists(hashes[1].prefix)); | |
| 434 EXPECT_FALSE(prefix_set->PrefixExists(hashes[2].prefix)); | |
| 435 } | |
| 436 } | |
| 437 | |
| 438 // Check that |CleanChecksum()| makes an acceptable checksum. | |
| 439 TEST_F(PrefixSetTest, CorruptionHelpers) { | |
| 440 base::FilePath filename; | |
| 441 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 442 | |
| 443 // This will modify data in |index_|, which will fail the digest check. | |
| 444 base::ScopedFILE file(base::OpenFile(filename, "r+b")); | |
| 445 IncrementIntAt(file.get(), kPayloadOffset, 1); | |
| 446 file.reset(); | |
| 447 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 448 ASSERT_FALSE(prefix_set.get()); | |
| 449 | |
| 450 // Fix up the checksum and it will read successfully (though the | |
| 451 // data will be wrong). | |
| 452 file.reset(base::OpenFile(filename, "r+b")); | |
| 453 CleanChecksum(file.get()); | |
| 454 file.reset(); | |
| 455 prefix_set = PrefixSet::LoadFile(filename); | |
| 456 ASSERT_TRUE(prefix_set.get()); | |
| 457 } | |
| 458 | |
| 459 // Bad magic is caught by the sanity check. | |
| 460 TEST_F(PrefixSetTest, CorruptionMagic) { | |
| 461 base::FilePath filename; | |
| 462 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 463 | |
| 464 ASSERT_NO_FATAL_FAILURE( | |
| 465 ModifyAndCleanChecksum(filename, kMagicOffset, 1)); | |
| 466 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 467 ASSERT_FALSE(prefix_set.get()); | |
| 468 } | |
| 469 | |
| 470 // Bad version is caught by the sanity check. | |
| 471 TEST_F(PrefixSetTest, CorruptionVersion) { | |
| 472 base::FilePath filename; | |
| 473 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 474 | |
| 475 ASSERT_NO_FATAL_FAILURE( | |
| 476 ModifyAndCleanChecksum(filename, kVersionOffset, 10)); | |
| 477 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 478 ASSERT_FALSE(prefix_set.get()); | |
| 479 } | |
| 480 | |
| 481 // Bad |index_| size is caught by the sanity check. | |
| 482 TEST_F(PrefixSetTest, CorruptionIndexSize) { | |
| 483 base::FilePath filename; | |
| 484 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 485 | |
| 486 ASSERT_NO_FATAL_FAILURE( | |
| 487 ModifyAndCleanChecksum(filename, kIndexSizeOffset, 1)); | |
| 488 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 489 ASSERT_FALSE(prefix_set.get()); | |
| 490 } | |
| 491 | |
| 492 // Bad |deltas_| size is caught by the sanity check. | |
| 493 TEST_F(PrefixSetTest, CorruptionDeltasSize) { | |
| 494 base::FilePath filename; | |
| 495 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 496 | |
| 497 ASSERT_NO_FATAL_FAILURE( | |
| 498 ModifyAndCleanChecksum(filename, kDeltasSizeOffset, 1)); | |
| 499 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 500 ASSERT_FALSE(prefix_set.get()); | |
| 501 } | |
| 502 | |
| 503 // Bad |full_hashes_| size is caught by the sanity check. | |
| 504 TEST_F(PrefixSetTest, CorruptionFullHashesSize) { | |
| 505 base::FilePath filename; | |
| 506 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 507 | |
| 508 ASSERT_NO_FATAL_FAILURE( | |
| 509 ModifyAndCleanChecksum(filename, kFullHashesSizeOffset, 1)); | |
| 510 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 511 ASSERT_FALSE(prefix_set.get()); | |
| 512 } | |
| 513 | |
| 514 // Test that the digest catches corruption in the middle of the file | |
| 515 // (in the payload between the header and the digest). | |
| 516 TEST_F(PrefixSetTest, CorruptionPayload) { | |
| 517 base::FilePath filename; | |
| 518 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 519 | |
| 520 base::ScopedFILE file(base::OpenFile(filename, "r+b")); | |
| 521 ASSERT_NO_FATAL_FAILURE(IncrementIntAt(file.get(), 666, 1)); | |
| 522 file.reset(); | |
| 523 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 524 ASSERT_FALSE(prefix_set.get()); | |
| 525 } | |
| 526 | |
| 527 // Test corruption in the digest itself. | |
| 528 TEST_F(PrefixSetTest, CorruptionDigest) { | |
| 529 base::FilePath filename; | |
| 530 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 531 | |
| 532 int64 size_64; | |
| 533 ASSERT_TRUE(base::GetFileSize(filename, &size_64)); | |
| 534 base::ScopedFILE file(base::OpenFile(filename, "r+b")); | |
| 535 long digest_offset = static_cast<long>(size_64 - sizeof(base::MD5Digest)); | |
| 536 ASSERT_NO_FATAL_FAILURE(IncrementIntAt(file.get(), digest_offset, 1)); | |
| 537 file.reset(); | |
| 538 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 539 ASSERT_FALSE(prefix_set.get()); | |
| 540 } | |
| 541 | |
| 542 // Test excess data after the digest (fails the size test). | |
| 543 TEST_F(PrefixSetTest, CorruptionExcess) { | |
| 544 base::FilePath filename; | |
| 545 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 546 | |
| 547 // Add some junk to the trunk. | |
| 548 base::ScopedFILE file(base::OpenFile(filename, "ab")); | |
| 549 const char buf[] = "im in ur base, killing ur d00dz."; | |
| 550 ASSERT_EQ(strlen(buf), fwrite(buf, 1, strlen(buf), file.get())); | |
| 551 file.reset(); | |
| 552 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 553 ASSERT_FALSE(prefix_set.get()); | |
| 554 } | |
| 555 | |
| 556 // Test that files which had 64-bit size_t are discarded. | |
| 557 TEST_F(PrefixSetTest, SizeTRecovery) { | |
| 558 base::FilePath filename; | |
| 559 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 560 | |
| 561 // Open the file for rewrite. | |
| 562 base::ScopedFILE file(base::OpenFile(filename, "r+b")); | |
| 563 | |
| 564 // Leave existing magic and version. | |
| 565 ASSERT_NE(-1, fseek(file.get(), sizeof(uint32) * 2, SEEK_SET)); | |
| 566 | |
| 567 // Indicate two index values and two deltas. | |
| 568 uint32 val = 2; | |
| 569 ASSERT_EQ(sizeof(val), fwrite(&val, 1, sizeof(val), file.get())); | |
| 570 ASSERT_EQ(sizeof(val), fwrite(&val, 1, sizeof(val), file.get())); | |
| 571 | |
| 572 // Write two index values with 64-bit "size_t". | |
| 573 std::pair<SBPrefix, uint64> item; | |
| 574 memset(&item, 0, sizeof(item)); // Includes any padding. | |
| 575 item.first = 17; | |
| 576 item.second = 0; | |
| 577 ASSERT_EQ(sizeof(item), fwrite(&item, 1, sizeof(item), file.get())); | |
| 578 item.first = 100042; | |
| 579 item.second = 1; | |
| 580 ASSERT_EQ(sizeof(item), fwrite(&item, 1, sizeof(item), file.get())); | |
| 581 | |
| 582 // Write two delta values. | |
| 583 uint16 delta = 23; | |
| 584 ASSERT_EQ(sizeof(delta), fwrite(&delta, 1, sizeof(delta), file.get())); | |
| 585 ASSERT_EQ(sizeof(delta), fwrite(&delta, 1, sizeof(delta), file.get())); | |
| 586 | |
| 587 // Leave space for the digest at the end, and regenerate it. | |
| 588 base::MD5Digest dummy = { { 0 } }; | |
| 589 ASSERT_EQ(sizeof(dummy), fwrite(&dummy, 1, sizeof(dummy), file.get())); | |
| 590 ASSERT_TRUE(base::TruncateFile(file.get())); | |
| 591 CleanChecksum(file.get()); | |
| 592 file.reset(); // Flush updates. | |
| 593 | |
| 594 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 595 ASSERT_FALSE(prefix_set.get()); | |
| 596 } | |
| 597 | |
| 598 // Test Exists() against full hashes passed to builder. | |
| 599 TEST_F(PrefixSetTest, FullHashBuild) { | |
| 600 const SBFullHash kHash1 = SBFullHashForString("one"); | |
| 601 const SBFullHash kHash2 = SBFullHashForString("two"); | |
| 602 const SBFullHash kHash3 = SBFullHashForString("three"); | |
| 603 const SBFullHash kHash4 = SBFullHashForString("four"); | |
| 604 const SBFullHash kHash5 = SBFullHashForString("five"); | |
| 605 const SBFullHash kHash6 = SBFullHashForString("six"); | |
| 606 | |
| 607 std::vector<SBPrefix> prefixes; | |
| 608 prefixes.push_back(kHash1.prefix); | |
| 609 prefixes.push_back(kHash2.prefix); | |
| 610 std::sort(prefixes.begin(), prefixes.end()); | |
| 611 | |
| 612 std::vector<SBFullHash> hashes; | |
| 613 hashes.push_back(kHash4); | |
| 614 hashes.push_back(kHash5); | |
| 615 | |
| 616 PrefixSetBuilder builder(prefixes); | |
| 617 scoped_ptr<const PrefixSet> prefix_set = builder.GetPrefixSet(hashes); | |
| 618 | |
| 619 EXPECT_TRUE(prefix_set->Exists(kHash1)); | |
| 620 EXPECT_TRUE(prefix_set->Exists(kHash2)); | |
| 621 EXPECT_FALSE(prefix_set->Exists(kHash3)); | |
| 622 EXPECT_TRUE(prefix_set->Exists(kHash4)); | |
| 623 EXPECT_TRUE(prefix_set->Exists(kHash5)); | |
| 624 EXPECT_FALSE(prefix_set->Exists(kHash6)); | |
| 625 | |
| 626 EXPECT_TRUE(prefix_set->PrefixExists(kHash1.prefix)); | |
| 627 EXPECT_TRUE(prefix_set->PrefixExists(kHash2.prefix)); | |
| 628 EXPECT_FALSE(prefix_set->PrefixExists(kHash3.prefix)); | |
| 629 EXPECT_FALSE(prefix_set->PrefixExists(kHash4.prefix)); | |
| 630 EXPECT_FALSE(prefix_set->PrefixExists(kHash5.prefix)); | |
| 631 EXPECT_FALSE(prefix_set->PrefixExists(kHash6.prefix)); | |
| 632 } | |
| 633 | |
| 634 // Test that a version 1 file is discarded on read. | |
| 635 TEST_F(PrefixSetTest, ReadSigned) { | |
| 636 base::FilePath filename; | |
| 637 ASSERT_TRUE(GetPrefixSetFile(&filename)); | |
| 638 | |
| 639 // Open the file for rewrite. | |
| 640 base::ScopedFILE file(base::OpenFile(filename, "r+b")); | |
| 641 | |
| 642 // Leave existing magic. | |
| 643 ASSERT_NE(-1, fseek(file.get(), sizeof(uint32), SEEK_SET)); | |
| 644 | |
| 645 // Version 1. | |
| 646 uint32 version = 1; | |
| 647 ASSERT_EQ(sizeof(version), fwrite(&version, 1, sizeof(version), file.get())); | |
| 648 | |
| 649 // Indicate two index values and two deltas. | |
| 650 uint32 val = 2; | |
| 651 ASSERT_EQ(sizeof(val), fwrite(&val, 1, sizeof(val), file.get())); | |
| 652 ASSERT_EQ(sizeof(val), fwrite(&val, 1, sizeof(val), file.get())); | |
| 653 | |
| 654 std::pair<int32, uint32> item; | |
| 655 memset(&item, 0, sizeof(item)); // Includes any padding. | |
| 656 item.first = -1000; | |
| 657 item.second = 0; | |
| 658 ASSERT_EQ(sizeof(item), fwrite(&item, 1, sizeof(item), file.get())); | |
| 659 item.first = 1000; | |
| 660 item.second = 1; | |
| 661 ASSERT_EQ(sizeof(item), fwrite(&item, 1, sizeof(item), file.get())); | |
| 662 | |
| 663 // Write two delta values. | |
| 664 uint16 delta = 23; | |
| 665 ASSERT_EQ(sizeof(delta), fwrite(&delta, 1, sizeof(delta), file.get())); | |
| 666 ASSERT_EQ(sizeof(delta), fwrite(&delta, 1, sizeof(delta), file.get())); | |
| 667 | |
| 668 // Leave space for the digest at the end, and regenerate it. | |
| 669 base::MD5Digest dummy = { { 0 } }; | |
| 670 ASSERT_EQ(sizeof(dummy), fwrite(&dummy, 1, sizeof(dummy), file.get())); | |
| 671 ASSERT_TRUE(base::TruncateFile(file.get())); | |
| 672 CleanChecksum(file.get()); | |
| 673 file.reset(); // Flush updates. | |
| 674 | |
| 675 scoped_ptr<const PrefixSet> prefix_set = PrefixSet::LoadFile(filename); | |
| 676 ASSERT_FALSE(prefix_set.get()); | |
| 677 } | |
| 678 | |
| 679 // Test that a golden v2 file is discarded on read. All platforms generating v2 | |
| 680 // files are little-endian, so there is no point to testing this transition | |
| 681 // if/when a big-endian port is added. | |
| 682 #if defined(ARCH_CPU_LITTLE_ENDIAN) | |
| 683 TEST_F(PrefixSetTest, Version2) { | |
| 684 std::vector<SBPrefix> ref_prefixes; | |
| 685 ASSERT_TRUE(ReadReferencePrefixes(&ref_prefixes)); | |
| 686 | |
| 687 const char kBasename[] = "PrefixSetVersion2"; | |
| 688 base::FilePath golden_path; | |
| 689 ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &golden_path)); | |
| 690 golden_path = golden_path.AppendASCII("SafeBrowsing"); | |
| 691 golden_path = golden_path.AppendASCII(kBasename); | |
| 692 | |
| 693 scoped_ptr<const PrefixSet> prefix_set(PrefixSet::LoadFile(golden_path)); | |
| 694 ASSERT_FALSE(prefix_set.get()); | |
| 695 } | |
| 696 #endif | |
| 697 | |
| 698 // Test that a golden v3 file can be read by the current code. All platforms | |
| 699 // generating v3 files are little-endian, so there is no point to testing this | |
| 700 // transition if/when a big-endian port is added. | |
| 701 #if defined(ARCH_CPU_LITTLE_ENDIAN) | |
| 702 TEST_F(PrefixSetTest, Version3) { | |
| 703 std::vector<SBPrefix> ref_prefixes; | |
| 704 ASSERT_TRUE(ReadReferencePrefixes(&ref_prefixes)); | |
| 705 | |
| 706 const char kBasename[] = "PrefixSetVersion3"; | |
| 707 base::FilePath golden_path; | |
| 708 ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &golden_path)); | |
| 709 golden_path = golden_path.AppendASCII("SafeBrowsing"); | |
| 710 golden_path = golden_path.AppendASCII(kBasename); | |
| 711 | |
| 712 scoped_ptr<const PrefixSet> prefix_set(PrefixSet::LoadFile(golden_path)); | |
| 713 ASSERT_TRUE(prefix_set.get()); | |
| 714 CheckPrefixes(*prefix_set, ref_prefixes); | |
| 715 | |
| 716 const SBFullHash kHash1 = SBFullHashForString("www.evil.com/malware.html"); | |
| 717 const SBFullHash kHash2 = SBFullHashForString("www.evil.com/phishing.html"); | |
| 718 | |
| 719 EXPECT_TRUE(prefix_set->Exists(kHash1)); | |
| 720 EXPECT_TRUE(prefix_set->Exists(kHash2)); | |
| 721 EXPECT_FALSE(prefix_set->PrefixExists(kHash1.prefix)); | |
| 722 EXPECT_FALSE(prefix_set->PrefixExists(kHash2.prefix)); | |
| 723 } | |
| 724 #endif | |
| 725 | |
| 726 } // namespace safe_browsing | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1415923004:
Move prefix_set and parts of safe_browsing_util into a new component safe_browsing_db. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master