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Merge pull request #6650

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42cb388 Add chainstate obfuscation to avoid spurious antivirus detection (James O'Beirne)
This commit is contained in:
Wladimir J. van der Laan
2015-10-06 17:32:18 +02:00
parent b7d78fd0bd 42cb388167
commit 4fac576c61
7 changed files with 338 additions and 22 deletions
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128
src/test/leveldbwrapper_tests.cpp Normal file
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// Copyright (c) 2012-2013 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "leveldbwrapper.h"
#include "uint256.h"
#include "random.h"
#include "test/test_bitcoin.h"
#include <boost/assign/std/vector.hpp> // for 'operator+=()'
#include <boost/assert.hpp>
#include <boost/test/unit_test.hpp>
using namespace std;
using namespace boost::assign; // bring 'operator+=()' into scope
using namespace boost::filesystem;
// Test if a string consists entirely of null characters
bool is_null_key(const vector<unsigned char>& key) {
bool isnull = true;
for (unsigned int i = 0; i < key.size(); i++)
isnull &= (key[i] == '\x00');
return isnull;
}
BOOST_FIXTURE_TEST_SUITE(leveldbwrapper_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(leveldbwrapper)
{
// Perform tests both obfuscated and non-obfuscated.
for (int i = 0; i < 2; i++) {
bool obfuscate = (bool)i;
path ph = temp_directory_path() / unique_path();
CLevelDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
char key = 'k';
uint256 in = GetRandHash();
uint256 res;
// Ensure that we're doing real obfuscation when obfuscate=true
BOOST_CHECK(obfuscate != is_null_key(dbw.GetObfuscateKey()));
BOOST_CHECK(dbw.Write(key, in));
BOOST_CHECK(dbw.Read(key, res));
BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
}
}
// Test that we do not obfuscation if there is existing data.
BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
{
// We're going to share this path between two wrappers
path ph = temp_directory_path() / unique_path();
create_directories(ph);
// Set up a non-obfuscated wrapper to write some initial data.
CLevelDBWrapper* dbw = new CLevelDBWrapper(ph, (1 << 10), false, false, false);
char key = 'k';
uint256 in = GetRandHash();
uint256 res;
BOOST_CHECK(dbw->Write(key, in));
BOOST_CHECK(dbw->Read(key, res));
BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
// Call the destructor to free leveldb LOCK
delete dbw;
// Now, set up another wrapper that wants to obfuscate the same directory
CLevelDBWrapper odbw(ph, (1 << 10), false, false, true);
// Check that the key/val we wrote with unobfuscated wrapper exists and
// is readable.
uint256 res2;
BOOST_CHECK(odbw.Read(key, res2));
BOOST_CHECK_EQUAL(res2.ToString(), in.ToString());
BOOST_CHECK(!odbw.IsEmpty()); // There should be existing data
BOOST_CHECK(is_null_key(odbw.GetObfuscateKey())); // The key should be an empty string
uint256 in2 = GetRandHash();
uint256 res3;
// Check that we can write successfully
BOOST_CHECK(odbw.Write(key, in2));
BOOST_CHECK(odbw.Read(key, res3));
BOOST_CHECK_EQUAL(res3.ToString(), in2.ToString());
}
// Ensure that we start obfuscating during a reindex.
BOOST_AUTO_TEST_CASE(existing_data_reindex)
{
// We're going to share this path between two wrappers
path ph = temp_directory_path() / unique_path();
create_directories(ph);
// Set up a non-obfuscated wrapper to write some initial data.
CLevelDBWrapper* dbw = new CLevelDBWrapper(ph, (1 << 10), false, false, false);
char key = 'k';
uint256 in = GetRandHash();
uint256 res;
BOOST_CHECK(dbw->Write(key, in));
BOOST_CHECK(dbw->Read(key, res));
BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
// Call the destructor to free leveldb LOCK
delete dbw;
// Simulate a -reindex by wiping the existing data store
CLevelDBWrapper odbw(ph, (1 << 10), false, true, true);
// Check that the key/val we wrote with unobfuscated wrapper doesn't exist
uint256 res2;
BOOST_CHECK(!odbw.Read(key, res2));
BOOST_CHECK(!is_null_key(odbw.GetObfuscateKey()));
uint256 in2 = GetRandHash();
uint256 res3;
// Check that we can write successfully
BOOST_CHECK(odbw.Write(key, in2));
BOOST_CHECK(odbw.Read(key, res3));
BOOST_CHECK_EQUAL(res3.ToString(), in2.ToString());
}
BOOST_AUTO_TEST_SUITE_END()

67
src/test/streams_tests.cpp Normal file
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// Copyright (c) 2012-2013 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "streams.h"
#include "support/allocators/zeroafterfree.h"
#include "test/test_bitcoin.h"
#include <boost/assign/std/vector.hpp> // for 'operator+=()'
#include <boost/assert.hpp>
#include <boost/test/unit_test.hpp>
using namespace std;
using namespace boost::assign; // bring 'operator+=()' into scope
BOOST_FIXTURE_TEST_SUITE(streams_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(streams_serializedata_xor)
{
std::vector<char> in;
std::vector<char> expected_xor;
std::vector<unsigned char> key;
CDataStream ds(in, 0, 0);
// Degenerate case
key += '\x00','\x00';
ds.Xor(key);
BOOST_CHECK_EQUAL(
std::string(expected_xor.begin(), expected_xor.end()),
std::string(ds.begin(), ds.end()));
in += '\x0f','\xf0';
expected_xor += '\xf0','\x0f';
// Single character key
ds.clear();
ds.insert(ds.begin(), in.begin(), in.end());
key.clear();
key += '\xff';
ds.Xor(key);
BOOST_CHECK_EQUAL(
std::string(expected_xor.begin(), expected_xor.end()),
std::string(ds.begin(), ds.end()));
// Multi character key
in.clear();
expected_xor.clear();
in += '\xf0','\x0f';
expected_xor += '\x0f','\x00';
ds.clear();
ds.insert(ds.begin(), in.begin(), in.end());
key.clear();
key += '\xff','\x0f';
ds.Xor(key);
BOOST_CHECK_EQUAL(
std::string(expected_xor.begin(), expected_xor.end()),
std::string(ds.begin(), ds.end()));
}
BOOST_AUTO_TEST_SUITE_END()