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// 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 "components/packed_ct_ev_whitelist/packed_ct_ev_whitelist.h"
#include <algorithm>
#include <string>
#include "base/big_endian.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
const uint8_t kFirstHashRaw[] =
{0x00, 0x00, 0x03, 0xd7, 0xfc, 0x18, 0x02, 0xcb};
std::string GetFirstHash() {
return std::string(reinterpret_cast<const char*>(kFirstHashRaw), 8);
}
// Second hash: Diff from first hash is > 2^47
const uint8_t kSecondHashRaw[] =
{0x00, 0x01, 0x05, 0xd2, 0x58, 0x47, 0xa7, 0xbf};
std::string GetSecondHash() {
return std::string(reinterpret_cast<const char*>(kSecondHashRaw), 8);
}
// Third hash: Diff from 2nd hash is < 2^47
const uint8_t kThirdHashRaw[] =
{0x00, 0x01, 0x48, 0x45, 0x8c, 0x53, 0x03, 0x94};
std::string GetThirdHash() {
return std::string(reinterpret_cast<const char*>(kThirdHashRaw), 8);
}
uint64_t HashToUint64(const std::string& hash_str) {
uint64_t ret;
base::ReadBigEndian(hash_str.c_str(), &ret);
return ret;
}
const uint8_t kWhitelistData[] = {
0x00, 0x00, 0x03, 0xd7, 0xfc, 0x18, 0x02, 0xcb, // First hash
0xc0, 0x7e, 0x97, 0x0b, 0xe9, 0x3d, 0x10, 0x9c,
0xcd, 0x02, 0xd6, 0xf5, 0x40,
};
std::string GetPartialWhitelistData(uint8_t num_bytes) {
return std::string(reinterpret_cast<const char*>(kWhitelistData), num_bytes);
}
std::string GetAllWhitelistData() {
return GetPartialWhitelistData(arraysize(kWhitelistData));
}
} // namespace
namespace packed_ct_ev_whitelist {
TEST(PackedEVCertsWhitelistTest, UncompressFailsForTooShortList) {
// This list does not contain enough bytes even for the first hash.
std::vector<uint64_t> res;
EXPECT_FALSE(PackedEVCertsWhitelist::UncompressEVWhitelist(
std::string(reinterpret_cast<const char*>(kWhitelistData), 7), &res));
}
TEST(PackedEVCertsWhitelistTest, UncompressFailsForTruncatedList) {
// This list is missing bits for the second part of the diff.
std::vector<uint64_t> res;
EXPECT_FALSE(PackedEVCertsWhitelist::UncompressEVWhitelist(
std::string(reinterpret_cast<const char*>(kWhitelistData), 14), &res));
}
TEST(PackedEVCertsWhitelistTest, UncompressFailsForInvalidValuesInList) {
// A list with an invalid read_prefix value is the number 131072, unary
// encoded, after the fist 8 bytes of a valid hash.
// That translates to 16385 0xff bytes.
// To make the hash otherwise valid, append 6 bytes of r value.
const int num_ff_bytes = 16385;
const int total_size = 8 + num_ff_bytes + 7;
uint8_t* invalid_whitelist = new uint8_t[total_size];
invalid_whitelist[total_size - 1] = '\0';
// Valid first hash.
memcpy(reinterpret_cast<char*>(invalid_whitelist),
reinterpret_cast<const char*>(kWhitelistData),
8 * sizeof(char));
// 0xff 16385 times.
for (int i = 0; i < num_ff_bytes; i++) {
invalid_whitelist[8 + i] = 0xff;
}
// Valid r value (any 6 bytes will do).
memcpy(reinterpret_cast<char*>(invalid_whitelist + 8 + num_ff_bytes),
reinterpret_cast<const char*>(kWhitelistData),
6 * sizeof(char));
std::vector<uint64_t> res;
EXPECT_FALSE(PackedEVCertsWhitelist::UncompressEVWhitelist(
std::string(reinterpret_cast<const char*>(invalid_whitelist),
total_size - 1),
&res));
delete[] invalid_whitelist;
}
TEST(PackedEVCertsWhitelistTest, UncompressesWhitelistCorrectly) {
std::vector<uint64_t> res;
ASSERT_TRUE(PackedEVCertsWhitelist::UncompressEVWhitelist(
GetAllWhitelistData(), &res));
// Ensure first hash is found
EXPECT_TRUE(std::find(res.begin(), res.end(), HashToUint64(GetFirstHash())) !=
res.end());
// Ensure second hash is found
EXPECT_TRUE(std::find(res.begin(),
res.end(),
HashToUint64(GetSecondHash())) != res.end());
// Ensure last hash is found
EXPECT_TRUE(std::find(res.begin(), res.end(), HashToUint64(GetThirdHash())) !=
res.end());
// Ensure that there are exactly 3 hashes.
EXPECT_EQ(3u, res.size());
}
TEST(PackedEVCertsWhitelistTest, CanFindHashInSetList) {
scoped_refptr<PackedEVCertsWhitelist> whitelist(
new PackedEVCertsWhitelist(GetAllWhitelistData(), base::Version()));
EXPECT_TRUE(whitelist->IsValid());
EXPECT_TRUE(whitelist->ContainsCertificateHash(GetFirstHash()));
EXPECT_TRUE(whitelist->ContainsCertificateHash(GetSecondHash()));
EXPECT_TRUE(whitelist->ContainsCertificateHash(GetThirdHash()));
}
TEST(PackedEVCertsWhitelistTest, CorrectlyIdentifiesEmptyWhitelistIsInvalid) {
scoped_refptr<PackedEVCertsWhitelist> whitelist(
new PackedEVCertsWhitelist(std::string(), base::Version()));
EXPECT_FALSE(whitelist->IsValid());
}
TEST(PackedEVCertsWhitelistTest, CorrectlyIdentifiesPartialWhitelistIsInvalid) {
scoped_refptr<PackedEVCertsWhitelist> whitelist(
new PackedEVCertsWhitelist(GetPartialWhitelistData(14), base::Version()));
EXPECT_FALSE(whitelist->IsValid());
}
TEST(PackedEVCertsWhitelistTest, CorrectlyIdentifiesWhitelistIsValid) {
scoped_refptr<PackedEVCertsWhitelist> whitelist(
new PackedEVCertsWhitelist(GetAllWhitelistData(), base::Version()));
EXPECT_TRUE(whitelist->IsValid());
}
} // namespace packed_ct_ev_whitelist
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