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https://github.com/keepassxreboot/keepassxc.git
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23ca46c918
As discussed in #4317, the next KeePass2 release will ship with support for a new generation of XML key files which enable hash integrity checks. This patch adds support for reading and generating this new format. By default, KeePass2 now uses the .keyx extension for generated key files, which was added to KeePassXC's key generation file chooser filter. We continue to generate hashed binary key files by default, but the user can explicitly save the file with the new .keyx extension to generate an XML v2 key file (currently undocumented). When opening a database, the key file type is still determined by content negotation, so the file extension has no impact here. As an additional change, the legacy key file warnings have been improved slightly to be less confusing and more helpful.
323 lines
11 KiB
C++
323 lines
11 KiB
C++
/*
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* Copyright (C) 2017 KeePassXC Team <team@keepassxc.org>
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* Copyright (C) 2011 Felix Geyer <debfx@fobos.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 or (at your option)
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* version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "TestKeys.h"
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#include "TestGlobal.h"
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#include <QBuffer>
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#include "config-keepassx-tests.h"
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#include "core/Metadata.h"
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#include "crypto/Crypto.h"
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#include "crypto/CryptoHash.h"
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#include "crypto/kdf/AesKdf.h"
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#include "format/KeePass2Reader.h"
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#include "format/KeePass2Writer.h"
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#include "keys/FileKey.h"
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#include "keys/PasswordKey.h"
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#include "mock/MockChallengeResponseKey.h"
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QTEST_GUILESS_MAIN(TestKeys)
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Q_DECLARE_METATYPE(FileKey::Type);
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void TestKeys::initTestCase()
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{
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QVERIFY(Crypto::init());
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}
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void TestKeys::testComposite()
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{
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auto compositeKey1 = QSharedPointer<CompositeKey>::create();
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auto passwordKey1 = QSharedPointer<PasswordKey>::create();
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auto passwordKey2 = QSharedPointer<PasswordKey>::create("test");
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// make sure that addKey() creates a copy of the keys
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compositeKey1->addKey(passwordKey1);
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compositeKey1->addKey(passwordKey2);
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AesKdf kdf;
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kdf.setRounds(1);
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QByteArray transformed1;
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QVERIFY(compositeKey1->transform(kdf, transformed1));
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QCOMPARE(transformed1.size(), 32);
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QScopedPointer<CompositeKey> compositeKey3(new CompositeKey());
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QScopedPointer<CompositeKey> compositeKey4(new CompositeKey());
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// test clear()
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compositeKey3->addKey(QSharedPointer<PasswordKey>::create("test"));
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compositeKey3->clear();
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QCOMPARE(compositeKey3->rawKey(), compositeKey4->rawKey());
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}
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void TestKeys::testFileKey()
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{
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QFETCH(FileKey::Type, type);
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QFETCH(QString, keyExt);
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QFETCH(bool, fileKeyOk);
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QString name = QString("FileKey").append(QTest::currentDataTag());
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KeePass2Reader reader;
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QString dbFilename = QString("%1/%2.kdbx").arg(QString(KEEPASSX_TEST_DATA_DIR), name);
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QString keyFilename = QString("%1/%2.%3").arg(QString(KEEPASSX_TEST_DATA_DIR), name, keyExt);
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auto compositeKey = QSharedPointer<CompositeKey>::create();
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auto fileKey = QSharedPointer<FileKey>::create();
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QString error;
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QVERIFY(fileKey->load(keyFilename, &error) == fileKeyOk);
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QVERIFY(error.isEmpty() == fileKeyOk);
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QCOMPARE(fileKey->type(), type);
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// Test for same behaviour on code path without error parameter
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auto fileKeyNoErrorParam = QSharedPointer<FileKey>::create();
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QVERIFY(fileKeyNoErrorParam->load(keyFilename) == fileKeyOk);
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QCOMPARE(fileKeyNoErrorParam->type(), type);
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QCOMPARE(fileKey->rawKey(), fileKeyNoErrorParam->rawKey());
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if (!fileKeyOk) {
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return;
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}
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QCOMPARE(fileKey->rawKey().size(), 32);
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compositeKey->addKey(fileKey);
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auto db = QSharedPointer<Database>::create();
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QVERIFY(db->open(dbFilename, compositeKey, nullptr, false));
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QVERIFY(!reader.hasError());
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QCOMPARE(db->metadata()->name(), QString("%1 Database").arg(name));
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}
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// clang-format off
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void TestKeys::testFileKey_data()
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{
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QTest::addColumn<FileKey::Type>("type");
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QTest::addColumn<QString>("keyExt");
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QTest::addColumn<bool>("fileKeyOk");
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QTest::newRow("Xml") << FileKey::KeePass2XML << QString("key") << true;
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QTest::newRow("XmlBrokenBase64") << FileKey::KeePass2XML << QString("key") << false;
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QTest::newRow("XmlV2") << FileKey::KeePass2XMLv2 << QString("keyx") << true;
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QTest::newRow("XmlV2HashFail") << FileKey::KeePass2XMLv2 << QString("keyx") << false;
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QTest::newRow("XmlV2BrokenHex") << FileKey::KeePass2XMLv2 << QString("keyx") << false;
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QTest::newRow("Binary") << FileKey::FixedBinary << QString("key") << true;
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QTest::newRow("Hex") << FileKey::FixedBinaryHex << QString("key") << true;
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QTest::newRow("Hashed") << FileKey::Hashed << QString("key") << true;
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}
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// clang-format on
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void TestKeys::testCreateFileKey()
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{
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QBuffer keyBuffer1;
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keyBuffer1.open(QBuffer::ReadWrite);
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FileKey::createRandom(&keyBuffer1, 128);
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QCOMPARE(keyBuffer1.size(), 128);
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QBuffer keyBuffer2;
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keyBuffer2.open(QBuffer::ReadWrite);
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FileKey::createRandom(&keyBuffer2, 64);
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QCOMPARE(keyBuffer2.size(), 64);
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}
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void TestKeys::testCreateAndOpenFileKey()
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{
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const QString dbName("testCreateFileKey database");
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QBuffer keyBuffer;
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keyBuffer.open(QBuffer::ReadWrite);
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FileKey::createRandom(&keyBuffer);
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keyBuffer.reset();
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auto fileKey = QSharedPointer<FileKey>::create();
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QVERIFY(fileKey->load(&keyBuffer));
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auto compositeKey = QSharedPointer<CompositeKey>::create();
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compositeKey->addKey(fileKey);
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QScopedPointer<Database> dbOrg(new Database());
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QVERIFY(dbOrg->setKey(compositeKey));
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dbOrg->metadata()->setName(dbName);
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QBuffer dbBuffer;
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dbBuffer.open(QBuffer::ReadWrite);
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KeePass2Writer writer;
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writer.writeDatabase(&dbBuffer, dbOrg.data());
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bool writeSuccess = writer.writeDatabase(&dbBuffer, dbOrg.data());
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if (writer.hasError()) {
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QFAIL(writer.errorString().toUtf8().constData());
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}
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QVERIFY(writeSuccess);
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dbBuffer.reset();
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KeePass2Reader reader;
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auto dbRead = QSharedPointer<Database>::create();
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reader.readDatabase(&dbBuffer, compositeKey, dbRead.data());
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if (reader.hasError()) {
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QFAIL(reader.errorString().toUtf8().constData());
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}
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QVERIFY(dbRead);
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QCOMPARE(dbRead->metadata()->name(), dbName);
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}
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void TestKeys::testFileKeyHash()
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{
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QBuffer keyBuffer;
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keyBuffer.open(QBuffer::ReadWrite);
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FileKey::createRandom(&keyBuffer);
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CryptoHash cryptoHash(CryptoHash::Sha256);
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cryptoHash.addData(keyBuffer.data());
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FileKey fileKey;
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fileKey.load(&keyBuffer);
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QCOMPARE(fileKey.rawKey(), cryptoHash.result());
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}
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void TestKeys::testFileKeyError()
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{
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bool result;
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QString errorMsg;
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const QString fileName(QString(KEEPASSX_TEST_DATA_DIR).append("/does/not/exist"));
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FileKey fileKey;
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result = fileKey.load(fileName, &errorMsg);
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QVERIFY(!result);
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QVERIFY(!errorMsg.isEmpty());
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errorMsg = "";
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result = FileKey::create(fileName, &errorMsg);
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QVERIFY(!result);
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QVERIFY(!errorMsg.isEmpty());
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errorMsg = "";
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}
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void TestKeys::benchmarkTransformKey()
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{
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QByteArray env = qgetenv("BENCHMARK");
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if (env.isEmpty() || env == "0" || env == "no") {
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QSKIP("Benchmark skipped. Set env variable BENCHMARK=1 to enable.");
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}
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auto pwKey = QSharedPointer<PasswordKey>::create();
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pwKey->setPassword("password");
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auto compositeKey = QSharedPointer<CompositeKey>::create();
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compositeKey->addKey(pwKey);
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QByteArray seed(32, '\x4B');
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QByteArray result;
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AesKdf kdf;
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kdf.setSeed(seed);
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kdf.setRounds(1e6);
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QBENCHMARK
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{
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Q_UNUSED(compositeKey->transform(kdf, result));
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};
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}
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void TestKeys::testCompositeKeyComponents()
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{
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auto passwordKeyEnc = QSharedPointer<PasswordKey>::create("password");
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auto fileKeyEnc = QSharedPointer<FileKey>::create();
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QString error;
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fileKeyEnc->load(QString("%1/%2").arg(QString(KEEPASSX_TEST_DATA_DIR), "FileKeyHashed.key"), &error);
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if (!error.isEmpty()) {
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QFAIL(qPrintable(error));
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}
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auto challengeResponseKeyEnc = QSharedPointer<MockChallengeResponseKey>::create(QByteArray(16, 0x10));
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auto compositeKeyEnc = QSharedPointer<CompositeKey>::create();
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compositeKeyEnc->addKey(passwordKeyEnc);
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compositeKeyEnc->addKey(fileKeyEnc);
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compositeKeyEnc->addChallengeResponseKey(challengeResponseKeyEnc);
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auto db1 = QSharedPointer<Database>::create();
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db1->setKey(compositeKeyEnc);
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KeePass2Writer writer;
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QBuffer buffer;
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buffer.open(QBuffer::ReadWrite);
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QVERIFY(writer.writeDatabase(&buffer, db1.data()));
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buffer.seek(0);
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auto db2 = QSharedPointer<Database>::create();
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KeePass2Reader reader;
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auto compositeKeyDec1 = QSharedPointer<CompositeKey>::create();
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// try decryption and subsequently add key components until decryption is successful
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QVERIFY(!reader.readDatabase(&buffer, compositeKeyDec1, db2.data()));
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QVERIFY(reader.hasError());
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compositeKeyDec1->addKey(passwordKeyEnc);
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buffer.seek(0);
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QVERIFY(!reader.readDatabase(&buffer, compositeKeyDec1, db2.data()));
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QVERIFY(reader.hasError());
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compositeKeyDec1->addKey(fileKeyEnc);
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buffer.seek(0);
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QVERIFY(!reader.readDatabase(&buffer, compositeKeyDec1, db2.data()));
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QVERIFY(reader.hasError());
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compositeKeyDec1->addChallengeResponseKey(challengeResponseKeyEnc);
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buffer.seek(0);
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QVERIFY(reader.readDatabase(&buffer, compositeKeyDec1, db2.data()));
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// now we should be able to open the database
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if (reader.hasError()) {
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QFAIL(qPrintable(reader.errorString()));
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}
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// try the same again, but this time with one wrong key component each time
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auto compositeKeyDec2 = QSharedPointer<CompositeKey>::create();
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compositeKeyDec2->addKey(QSharedPointer<PasswordKey>::create("wrong password"));
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compositeKeyDec2->addKey(fileKeyEnc);
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compositeKeyDec2->addChallengeResponseKey(challengeResponseKeyEnc);
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buffer.seek(0);
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QVERIFY(!reader.readDatabase(&buffer, compositeKeyDec2, db2.data()));
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QVERIFY(reader.hasError());
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auto compositeKeyDec3 = QSharedPointer<CompositeKey>::create();
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compositeKeyDec3->addKey(passwordKeyEnc);
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auto fileKeyWrong = QSharedPointer<FileKey>::create();
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fileKeyWrong->load(QString("%1/%2").arg(QString(KEEPASSX_TEST_DATA_DIR), "FileKeyHashed2.key"), &error);
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if (!error.isEmpty()) {
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QFAIL(qPrintable(error));
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}
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compositeKeyDec3->addKey(fileKeyWrong);
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compositeKeyDec3->addChallengeResponseKey(challengeResponseKeyEnc);
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buffer.seek(0);
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QVERIFY(!reader.readDatabase(&buffer, compositeKeyDec3, db2.data()));
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QVERIFY(reader.hasError());
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auto compositeKeyDec4 = QSharedPointer<CompositeKey>::create();
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compositeKeyDec4->addKey(passwordKeyEnc);
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compositeKeyDec4->addKey(fileKeyEnc);
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compositeKeyDec4->addChallengeResponseKey(QSharedPointer<MockChallengeResponseKey>::create(QByteArray(16, 0x20)));
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buffer.seek(0);
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QVERIFY(!reader.readDatabase(&buffer, compositeKeyDec4, db2.data()));
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QVERIFY(reader.hasError());
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}
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