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// Copyright (c) 2012-2015 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "dbwrapper.h"
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#include "uint256.h"
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#include "random.h"
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#include "test/test_bitcoin.h"
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#include <boost/assign/std/vector.hpp> // for 'operator+=()'
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#include <boost/assert.hpp>
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#include <boost/test/unit_test.hpp>
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using namespace std;
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using namespace boost::assign; // bring 'operator+=()' into scope
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using namespace boost::filesystem;
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// Test if a string consists entirely of null characters
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bool is_null_key(const vector<unsigned char>& key) {
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bool isnull = true;
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for (unsigned int i = 0; i < key.size(); i++)
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isnull &= (key[i] == '\x00');
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return isnull;
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}
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BOOST_FIXTURE_TEST_SUITE(dbwrapper_tests, BasicTestingSetup)
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BOOST_AUTO_TEST_CASE(dbwrapper)
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{
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// Perform tests both obfuscated and non-obfuscated.
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for (int i = 0; i < 2; i++) {
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bool obfuscate = (bool)i;
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path ph = temp_directory_path() / unique_path();
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CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
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char key = 'k';
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uint256 in = GetRandHash();
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uint256 res;
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// Ensure that we're doing real obfuscation when obfuscate=true
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BOOST_CHECK(obfuscate != is_null_key(dbwrapper_private::GetObfuscateKey(dbw)));
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BOOST_CHECK(dbw.Write(key, in));
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BOOST_CHECK(dbw.Read(key, res));
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BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
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}
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}
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// Test batch operations
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BOOST_AUTO_TEST_CASE(dbwrapper_batch)
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{
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// Perform tests both obfuscated and non-obfuscated.
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for (int i = 0; i < 2; i++) {
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bool obfuscate = (bool)i;
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path ph = temp_directory_path() / unique_path();
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CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
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char key = 'i';
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uint256 in = GetRandHash();
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char key2 = 'j';
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uint256 in2 = GetRandHash();
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char key3 = 'k';
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uint256 in3 = GetRandHash();
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uint256 res;
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CDBBatch batch(dbw);
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batch.Write(key, in);
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batch.Write(key2, in2);
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batch.Write(key3, in3);
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// Remove key3 before it's even been written
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batch.Erase(key3);
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dbw.WriteBatch(batch);
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BOOST_CHECK(dbw.Read(key, res));
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BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
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BOOST_CHECK(dbw.Read(key2, res));
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BOOST_CHECK_EQUAL(res.ToString(), in2.ToString());
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// key3 never should've been written
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BOOST_CHECK(dbw.Read(key3, res) == false);
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}
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}
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BOOST_AUTO_TEST_CASE(dbwrapper_iterator)
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{
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// Perform tests both obfuscated and non-obfuscated.
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for (int i = 0; i < 2; i++) {
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bool obfuscate = (bool)i;
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path ph = temp_directory_path() / unique_path();
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CDBWrapper dbw(ph, (1 << 20), true, false, obfuscate);
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// The two keys are intentionally chosen for ordering
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char key = 'j';
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uint256 in = GetRandHash();
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BOOST_CHECK(dbw.Write(key, in));
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char key2 = 'k';
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uint256 in2 = GetRandHash();
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BOOST_CHECK(dbw.Write(key2, in2));
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boost::scoped_ptr<CDBIterator> it(const_cast<CDBWrapper*>(&dbw)->NewIterator());
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// Be sure to seek past the obfuscation key (if it exists)
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it->Seek(key);
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char key_res;
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uint256 val_res;
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it->GetKey(key_res);
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it->GetValue(val_res);
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BOOST_CHECK_EQUAL(key_res, key);
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BOOST_CHECK_EQUAL(val_res.ToString(), in.ToString());
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it->Next();
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it->GetKey(key_res);
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it->GetValue(val_res);
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BOOST_CHECK_EQUAL(key_res, key2);
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BOOST_CHECK_EQUAL(val_res.ToString(), in2.ToString());
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it->Next();
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BOOST_CHECK_EQUAL(it->Valid(), false);
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}
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}
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// Test that we do not obfuscation if there is existing data.
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BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
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{
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// We're going to share this path between two wrappers
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path ph = temp_directory_path() / unique_path();
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create_directories(ph);
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// Set up a non-obfuscated wrapper to write some initial data.
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CDBWrapper* dbw = new CDBWrapper(ph, (1 << 10), false, false, false);
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char key = 'k';
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uint256 in = GetRandHash();
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uint256 res;
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BOOST_CHECK(dbw->Write(key, in));
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BOOST_CHECK(dbw->Read(key, res));
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BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
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// Call the destructor to free leveldb LOCK
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delete dbw;
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// Now, set up another wrapper that wants to obfuscate the same directory
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CDBWrapper odbw(ph, (1 << 10), false, false, true);
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// Check that the key/val we wrote with unobfuscated wrapper exists and
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// is readable.
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uint256 res2;
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BOOST_CHECK(odbw.Read(key, res2));
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BOOST_CHECK_EQUAL(res2.ToString(), in.ToString());
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BOOST_CHECK(!odbw.IsEmpty()); // There should be existing data
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BOOST_CHECK(is_null_key(dbwrapper_private::GetObfuscateKey(odbw))); // The key should be an empty string
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uint256 in2 = GetRandHash();
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uint256 res3;
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// Check that we can write successfully
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BOOST_CHECK(odbw.Write(key, in2));
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BOOST_CHECK(odbw.Read(key, res3));
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BOOST_CHECK_EQUAL(res3.ToString(), in2.ToString());
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}
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// Ensure that we start obfuscating during a reindex.
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BOOST_AUTO_TEST_CASE(existing_data_reindex)
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{
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// We're going to share this path between two wrappers
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path ph = temp_directory_path() / unique_path();
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create_directories(ph);
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// Set up a non-obfuscated wrapper to write some initial data.
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CDBWrapper* dbw = new CDBWrapper(ph, (1 << 10), false, false, false);
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char key = 'k';
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uint256 in = GetRandHash();
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uint256 res;
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BOOST_CHECK(dbw->Write(key, in));
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BOOST_CHECK(dbw->Read(key, res));
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BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
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// Call the destructor to free leveldb LOCK
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delete dbw;
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// Simulate a -reindex by wiping the existing data store
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CDBWrapper odbw(ph, (1 << 10), false, true, true);
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// Check that the key/val we wrote with unobfuscated wrapper doesn't exist
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uint256 res2;
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BOOST_CHECK(!odbw.Read(key, res2));
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BOOST_CHECK(!is_null_key(dbwrapper_private::GetObfuscateKey(odbw)));
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uint256 in2 = GetRandHash();
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uint256 res3;
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// Check that we can write successfully
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BOOST_CHECK(odbw.Write(key, in2));
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BOOST_CHECK(odbw.Read(key, res3));
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BOOST_CHECK_EQUAL(res3.ToString(), in2.ToString());
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}
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BOOST_AUTO_TEST_SUITE_END()
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