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| 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/net/packed_ct_ev_whitelist.h" |
| 6 |
| 7 #include <algorithm> |
| 8 #include <string> |
| 9 |
| 10 #include "base/big_endian.h" |
| 11 #include "testing/gtest/include/gtest/gtest.h" |
| 12 |
| 13 namespace { |
| 14 |
| 15 const uint8_t kFirstHashRaw[] = |
| 16 {0x00, 0x00, 0x03, 0xd7, 0xfc, 0x18, 0x02, 0xcb}; |
| 17 std::string GetFirstHash() { |
| 18 return std::string(reinterpret_cast<const char*>(kFirstHashRaw), 8); |
| 19 } |
| 20 |
| 21 // Second hash: Diff from first hash is > 2^47 |
| 22 const uint8_t kSecondHashRaw[] = |
| 23 {0x00, 0x01, 0x05, 0xd2, 0x58, 0x47, 0xa7, 0xbf}; |
| 24 std::string GetSecondHash() { |
| 25 return std::string(reinterpret_cast<const char*>(kSecondHashRaw), 8); |
| 26 } |
| 27 |
| 28 // Third hash: Diff from 2nd hash is < 2^47 |
| 29 const uint8_t kThirdHashRaw[] = |
| 30 {0x00, 0x01, 0x48, 0x45, 0x8c, 0x53, 0x03, 0x94}; |
| 31 std::string GetThirdHash() { |
| 32 return std::string(reinterpret_cast<const char*>(kThirdHashRaw), 8); |
| 33 } |
| 34 |
| 35 uint64_t HashToUint64(const std::string& hash_str) { |
| 36 uint64_t ret; |
| 37 base::ReadBigEndian(hash_str.c_str(), &ret); |
| 38 return ret; |
| 39 } |
| 40 |
| 41 const uint8_t kWhitelistData[] = { |
| 42 0x00, 0x00, 0x03, 0xd7, 0xfc, 0x18, 0x02, 0xcb, // First hash |
| 43 0xc0, 0x7e, 0x97, 0x0b, 0xe9, 0x3d, 0x10, 0x9c, |
| 44 0xcd, 0x02, 0xd6, 0xf5, 0x40, |
| 45 }; |
| 46 |
| 47 std::string GetPartialWhitelistData(uint8_t num_bytes) { |
| 48 return std::string(reinterpret_cast<const char*>(kWhitelistData), num_bytes); |
| 49 } |
| 50 |
| 51 std::string GetAllWhitelistData() { |
| 52 return GetPartialWhitelistData(arraysize(kWhitelistData)); |
| 53 } |
| 54 |
| 55 } // namespace |
| 56 |
| 57 TEST(PackedEVCertsWhitelistTest, UncompressFailsForTooShortList) { |
| 58 // This list does not contain enough bytes even for the first hash. |
| 59 std::vector<uint64_t> res; |
| 60 EXPECT_FALSE(PackedEVCertsWhitelist::UncompressEVWhitelist( |
| 61 std::string(reinterpret_cast<const char*>(kWhitelistData), 7), &res)); |
| 62 } |
| 63 |
| 64 TEST(PackedEVCertsWhitelistTest, UncompressFailsForTruncatedList) { |
| 65 // This list is missing bits for the second part of the diff. |
| 66 std::vector<uint64_t> res; |
| 67 EXPECT_FALSE(PackedEVCertsWhitelist::UncompressEVWhitelist( |
| 68 std::string(reinterpret_cast<const char*>(kWhitelistData), 14), &res)); |
| 69 } |
| 70 |
| 71 TEST(PackedEVCertsWhitelistTest, UncompressFailsForInvalidValuesInList) { |
| 72 // A list with an invalid read_prefix value is the number 131072, unary |
| 73 // encoded, after the fist 8 bytes of a valid hash. |
| 74 // That translates to 16385 0xff bytes. |
| 75 // To make the hash otherwise valid, append 6 bytes of r value. |
| 76 const int num_ff_bytes = 16385; |
| 77 const int total_size = 8 + num_ff_bytes + 7; |
| 78 uint8_t* invalid_whitelist = new uint8_t[total_size]; |
| 79 invalid_whitelist[total_size - 1] = '\0'; |
| 80 // Valid first hash. |
| 81 memcpy(reinterpret_cast<char*>(invalid_whitelist), |
| 82 reinterpret_cast<const char*>(kWhitelistData), |
| 83 8 * sizeof(char)); |
| 84 // 0xff 16385 times. |
| 85 for (int i = 0; i < num_ff_bytes; i++) { |
| 86 invalid_whitelist[8 + i] = 0xff; |
| 87 } |
| 88 // Valid r value (any 6 bytes will do). |
| 89 memcpy(reinterpret_cast<char*>(invalid_whitelist + 8 + num_ff_bytes), |
| 90 reinterpret_cast<const char*>(kWhitelistData), |
| 91 6 * sizeof(char)); |
| 92 |
| 93 std::vector<uint64_t> res; |
| 94 EXPECT_FALSE(PackedEVCertsWhitelist::UncompressEVWhitelist( |
| 95 std::string(reinterpret_cast<const char*>(invalid_whitelist), |
| 96 total_size - 1), |
| 97 &res)); |
| 98 delete[] invalid_whitelist; |
| 99 } |
| 100 |
| 101 TEST(PackedEVCertsWhitelistTest, UncompressesWhitelistCorrectly) { |
| 102 std::vector<uint64_t> res; |
| 103 ASSERT_TRUE(PackedEVCertsWhitelist::UncompressEVWhitelist( |
| 104 GetAllWhitelistData(), &res)); |
| 105 |
| 106 // Ensure first hash is found |
| 107 EXPECT_TRUE(std::find(res.begin(), res.end(), HashToUint64(GetFirstHash())) != |
| 108 res.end()); |
| 109 // Ensure second hash is found |
| 110 EXPECT_TRUE(std::find(res.begin(), |
| 111 res.end(), |
| 112 HashToUint64(GetSecondHash())) != res.end()); |
| 113 // Ensure last hash is found |
| 114 EXPECT_TRUE(std::find(res.begin(), res.end(), HashToUint64(GetThirdHash())) != |
| 115 res.end()); |
| 116 // Ensure that there are exactly 3 hashes. |
| 117 EXPECT_EQ(3u, res.size()); |
| 118 } |
| 119 |
| 120 TEST(PackedEVCertsWhitelistTest, CanFindHashInSetList) { |
| 121 scoped_refptr<PackedEVCertsWhitelist> whitelist( |
| 122 new PackedEVCertsWhitelist(GetAllWhitelistData())); |
| 123 |
| 124 EXPECT_TRUE(whitelist->IsValid()); |
| 125 EXPECT_TRUE(whitelist->ContainsCertificateHash(GetFirstHash())); |
| 126 EXPECT_TRUE(whitelist->ContainsCertificateHash(GetSecondHash())); |
| 127 EXPECT_TRUE(whitelist->ContainsCertificateHash(GetThirdHash())); |
| 128 } |
| 129 |
| 130 TEST(PackedEVCertsWhitelistTest, CorrectlyIdentifiesEmptyWhitelistIsInvalid) { |
| 131 scoped_refptr<PackedEVCertsWhitelist> whitelist( |
| 132 new PackedEVCertsWhitelist("")); |
| 133 |
| 134 EXPECT_FALSE(whitelist->IsValid()); |
| 135 } |
| 136 |
| 137 TEST(PackedEVCertsWhitelistTest, CorrectlyIdentifiesPartialWhitelistIsInvalid) { |
| 138 scoped_refptr<PackedEVCertsWhitelist> whitelist( |
| 139 new PackedEVCertsWhitelist(GetPartialWhitelistData(14))); |
| 140 |
| 141 EXPECT_FALSE(whitelist->IsValid()); |
| 142 } |
| 143 |
| 144 TEST(PackedEVCertsWhitelistTest, CorrectlyIdentifiesWhitelistIsValid) { |
| 145 scoped_refptr<PackedEVCertsWhitelist> whitelist( |
| 146 new PackedEVCertsWhitelist(GetAllWhitelistData())); |
| 147 |
| 148 EXPECT_TRUE(whitelist->IsValid()); |
| 149 } |
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