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/*
* SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "syncenginetestutils.h"
#include "clientsideencryption.h"
#include "foldermetadata.h"
#include <QtTest>
using namespace OCC;
class TestClientSideEncryptionV2 : public QObject
{
Q_OBJECT
QScopedPointer<FakeQNAM> _fakeQnam;
QScopedPointer<FolderMetadata> _parsedMetadataWithFileDrop;
QScopedPointer<FolderMetadata> _parsedMetadataAfterProcessingFileDrop;
AccountPtr _account;
AccountPtr _secondAccount;
private slots:
void initTestCase()
{
OCC::Logger::instance()->setLogFlush(true);
OCC::Logger::instance()->setLogDebug(true);
QStandardPaths::setTestModeEnabled(true);
QVariantMap fakeCapabilities;
fakeCapabilities[QStringLiteral("end-to-end-encryption")] = QVariantMap{
{QStringLiteral("enabled"), true},
{QStringLiteral("api-version"), "2.0"}
};
const QUrl fakeUrl("http://example.de");
{
_account = Account::create();
_fakeQnam.reset(new FakeQNAM({}));
const auto cred = new FakeCredentials{_fakeQnam.data()};
cred->setUserName("test");
_account->setCredentials(cred);
_account->setUrl(fakeUrl);
_account->setCapabilities(fakeCapabilities);
}
{
// make a second fake account so we can share metadata to it later
_secondAccount = Account::create();
_fakeQnam.reset(new FakeQNAM({}));
const auto credSecond = new FakeCredentials{_fakeQnam.data()};
credSecond->setUserName("sharee");
_secondAccount->setCredentials(credSecond);
_secondAccount->setUrl(fakeUrl);
_secondAccount->setCapabilities(fakeCapabilities);
}
QSslCertificate cert;
QSslKey publicKey;
QByteArray privateKey;
{
QFile e2eTestFakeCert(QStringLiteral("e2etestsfakecert.pem"));
QVERIFY(e2eTestFakeCert.open(QFile::ReadOnly));
cert = QSslCertificate(e2eTestFakeCert.readAll());
}
{
QFile e2etestsfakecertpublickey(QStringLiteral("e2etestsfakecertpublickey.pem"));
QVERIFY(e2etestsfakecertpublickey.open(QFile::ReadOnly));
publicKey = QSslKey(e2etestsfakecertpublickey.readAll(), QSsl::KeyAlgorithm::Rsa, QSsl::EncodingFormat::Pem, QSsl::KeyType::PublicKey);
e2etestsfakecertpublickey.close();
}
{
QFile e2etestsfakecertprivatekey(QStringLiteral("e2etestsfakecertprivatekey.pem"));
QVERIFY(e2etestsfakecertprivatekey.open(QFile::ReadOnly));
privateKey = e2etestsfakecertprivatekey.readAll();
}
QVERIFY(!cert.isNull());
QVERIFY(!publicKey.isNull());
QVERIFY(!privateKey.isEmpty());
_account->e2e()->setCertificate(cert);
_account->e2e()->setPrivateKey(privateKey);
_secondAccount->e2e()->setCertificate(cert);
_secondAccount->e2e()->setPrivateKey(privateKey);
}
void testInitializeNewRootFolderMetadataThenEncryptAndDecrypt()
{
QScopedPointer<FolderMetadata> metadata(new FolderMetadata(_account, "/", FolderMetadata::FolderType::Root));
QSignalSpy metadataSetupCompleteSpy(metadata.data(), &FolderMetadata::setupComplete);
metadataSetupCompleteSpy.wait();
QCOMPARE(metadataSetupCompleteSpy.count(), 1);
QVERIFY(metadata->isValid());
const auto fakeFileName = "fakefile.txt";
FolderMetadata::EncryptedFile encryptedFile;
encryptedFile.encryptionKey = EncryptionHelper::generateRandom(16);
encryptedFile.encryptedFilename = EncryptionHelper::generateRandomFilename();
encryptedFile.originalFilename = fakeFileName;
encryptedFile.mimetype = "application/octet-stream";
encryptedFile.initializationVector = EncryptionHelper::generateRandom(16);
metadata->addEncryptedFile(encryptedFile);
const auto encryptedMetadata = metadata->encryptedMetadata();
QVERIFY(!encryptedMetadata.isEmpty());
const auto signature = metadata->metadataSignature();
QVERIFY(!signature.isEmpty());
const auto metaDataDoc = QJsonDocument::fromJson(encryptedMetadata);
const auto folderUsers = metaDataDoc["users"].toArray();
QVERIFY(!folderUsers.isEmpty());
auto isCurrentUserPresentAndCanDecrypt = false;
for (auto it = folderUsers.constBegin(); it != folderUsers.constEnd(); ++it) {
const auto folderUserObject = it->toObject();
const auto userId = folderUserObject.value("userId").toString();
if (userId != _account->davUser()) {
continue;
}
const auto certificatePem = folderUserObject.value("certificate").toString().toUtf8();
const auto certificate = QSslCertificate{certificatePem};
const auto encryptedMetadataKey = QByteArray::fromBase64(folderUserObject.value("encryptedMetadataKey").toString().toUtf8());
if (!encryptedMetadataKey.isEmpty()) {
const auto decryptedMetadataKey = metadata->decryptDataWithPrivateKey(encryptedMetadataKey);
if (decryptedMetadataKey.isEmpty()) {
break;
}
const auto metadataObj = metaDataDoc.object()["metadata"].toObject();
const auto cipherTextEncrypted = metadataObj["ciphertext"].toString().toLocal8Bit();
// for compatibility, the format is "cipheredpart|initializationVector", so we need to extract the "cipheredpart"
const auto cipherTextPartExtracted = cipherTextEncrypted.split('|').at(0);
const auto nonce = QByteArray::fromBase64(metadataObj["nonce"].toString().toLocal8Bit());
const auto cipherTextDecrypted =
EncryptionHelper::decryptThenUnGzipData(decryptedMetadataKey, QByteArray::fromBase64(cipherTextPartExtracted), nonce);
if (cipherTextDecrypted.isEmpty()) {
break;
}
const auto cipherTextDocument = QJsonDocument::fromJson(cipherTextDecrypted);
const auto files = cipherTextDocument.object()["files"].toObject();
if (files.isEmpty()) {
break;
}
const auto parsedEncryptedFile = metadata->parseEncryptedFileFromJson(files.keys().first(), files.value(files.keys().first()));
QCOMPARE(parsedEncryptedFile.originalFilename, fakeFileName);
isCurrentUserPresentAndCanDecrypt = true;
break;
}
}
QEXPECT_FAIL("", "to be fixed later or removed entirely", Continue);
QVERIFY(isCurrentUserPresentAndCanDecrypt);
auto encryptedMetadataCopy = encryptedMetadata;
encryptedMetadataCopy.replace("\"", "\\\"");
QJsonDocument ocsDoc = QJsonDocument::fromJson(QStringLiteral("{\"ocs\": {\"data\": {\"meta-data\": \"%1\"}}}").arg(QString::fromUtf8(encryptedMetadataCopy)).toUtf8());
QScopedPointer<FolderMetadata> metadataFromJson(new FolderMetadata(_account, "/",
ocsDoc.toJson(),
RootEncryptedFolderInfo::makeDefault(), signature));
QSignalSpy metadataSetupExistingCompleteSpy(metadataFromJson.data(), &FolderMetadata::setupComplete);
metadataSetupExistingCompleteSpy.wait();
QCOMPARE(metadataSetupExistingCompleteSpy.count(), 1);
QEXPECT_FAIL("", "to be fixed later or removed entirely", Continue);
QVERIFY(metadataFromJson->isValid());
}
void testFolderMetadataWithEmptySignatureDecryptFails()
{
QScopedPointer<FolderMetadata> metadata(new FolderMetadata(_account, "/", FolderMetadata::FolderType::Root));
QSignalSpy metadataSetupCompleteSpy(metadata.data(), &FolderMetadata::setupComplete);
metadataSetupCompleteSpy.wait();
QCOMPARE(metadataSetupCompleteSpy.count(), 1);
QVERIFY(metadata->isValid());
const auto encryptedMetadata = metadata->encryptedMetadata();
QVERIFY(!encryptedMetadata.isEmpty());
const auto signature = metadata->metadataSignature();
QVERIFY(!signature.isEmpty());
auto encryptedMetadataCopy = encryptedMetadata;
encryptedMetadataCopy.replace("\"", "\\\"");
const QJsonDocument ocsDoc = QJsonDocument::fromJson(QStringLiteral("{\"ocs\": {\"data\": {\"meta-data\": \"%1\"}}}")
.arg(QString::fromUtf8(encryptedMetadataCopy)).toUtf8());
const QByteArray emptySignature = {};
QScopedPointer<FolderMetadata> metadataFromJson(new FolderMetadata(_account, "/",
ocsDoc.toJson(),
RootEncryptedFolderInfo::makeDefault(),
emptySignature));
QSignalSpy metadataSetupExistingCompleteSpy(metadataFromJson.data(), &FolderMetadata::setupComplete);
metadataSetupExistingCompleteSpy.wait();
QCOMPARE(metadataSetupExistingCompleteSpy.count(), 1);
QVERIFY(metadataFromJson->metadataSignature().isEmpty());
QVERIFY(metadataFromJson->metadataKeyForDecryption().isEmpty());
QVERIFY(!metadataFromJson->isValid());
}
void testE2EeFolderMetadataSharing()
{
// instantiate empty metadata, add a file, and share with a second user "sharee"
QScopedPointer<FolderMetadata> metadata(new FolderMetadata(_account, "/", FolderMetadata::FolderType::Root));
QSignalSpy metadataSetupCompleteSpy(metadata.data(), &FolderMetadata::setupComplete);
metadataSetupCompleteSpy.wait();
QCOMPARE(metadataSetupCompleteSpy.count(), 1);
QVERIFY(metadata->isValid());
const auto fakeFileName = "fakefile.txt";
FolderMetadata::EncryptedFile encryptedFile;
encryptedFile.encryptionKey = EncryptionHelper::generateRandom(16);
encryptedFile.encryptedFilename = EncryptionHelper::generateRandomFilename();
encryptedFile.originalFilename = fakeFileName;
encryptedFile.mimetype = "application/octet-stream";
encryptedFile.initializationVector = EncryptionHelper::generateRandom(16);
metadata->addEncryptedFile(encryptedFile);
QVERIFY(metadata->addUser(_secondAccount->davUser(), _secondAccount->e2e()->getCertificate(), FolderMetadata::CertificateType::SoftwareNextcloudCertificate));
QVERIFY(metadata->removeUser(_secondAccount->davUser()));
QVERIFY(metadata->addUser(_secondAccount->davUser(), _secondAccount->e2e()->getCertificate(), FolderMetadata::CertificateType::SoftwareNextcloudCertificate));
const auto encryptedMetadata = metadata->encryptedMetadata();
QVERIFY(!encryptedMetadata.isEmpty());
const auto signature = metadata->metadataSignature();
QVERIFY(!signature.isEmpty());
const auto metaDataDoc = QJsonDocument::fromJson(encryptedMetadata);
const auto folderUsers = metaDataDoc["users"].toArray();
QVERIFY(!folderUsers.isEmpty());
// make sure metadata setup was a success and we can parse and decrypt it with a second account "sharee"
auto isShareeUserPresentAndCanDecrypt = false;
for (auto it = folderUsers.constBegin(); it != folderUsers.constEnd(); ++it) {
const auto folderUserObject = it->toObject();
const auto userId = folderUserObject.value("userId").toString();
if (userId != _secondAccount->davUser()) {
continue;
}
const auto certificatePem = folderUserObject.value("certificate").toString().toUtf8();
const auto certificate = QSslCertificate{certificatePem};
const auto encryptedMetadataKey = QByteArray::fromBase64(folderUserObject.value("encryptedMetadataKey").toString().toUtf8());
if (!encryptedMetadataKey.isEmpty()) {
const auto decryptedMetadataKey = metadata->decryptDataWithPrivateKey(encryptedMetadataKey);
if (decryptedMetadataKey.isEmpty()) {
break;
}
const auto metadataObj = metaDataDoc.object()["metadata"].toObject();
const auto cipherTextEncrypted = metadataObj["ciphertext"].toString().toLocal8Bit();
// for compatibility, the format is "cipheredpart|initializationVector", so we need to extract the "cipheredpart"
const auto cipherTextPartExtracted = cipherTextEncrypted.split('|').at(0);
const auto nonce = QByteArray::fromBase64(metadataObj["nonce"].toString().toLocal8Bit());
const auto cipherTextDecrypted =
EncryptionHelper::decryptThenUnGzipData(decryptedMetadataKey, QByteArray::fromBase64(cipherTextPartExtracted), nonce);
if (cipherTextDecrypted.isEmpty()) {
break;
}
const auto cipherTextDocument = QJsonDocument::fromJson(cipherTextDecrypted);
const auto files = cipherTextDocument.object()["files"].toObject();
if (files.isEmpty()) {
break;
}
const auto parsedEncryptedFile = metadata->parseEncryptedFileFromJson(files.keys().first(), files.value(files.keys().first()));
QCOMPARE(parsedEncryptedFile.originalFilename, fakeFileName);
isShareeUserPresentAndCanDecrypt = true;
break;
}
}
QEXPECT_FAIL("", "to be fixed later or removed entirely", Abort);
QVERIFY(isShareeUserPresentAndCanDecrypt);
// now, setup existing metadata for the second user "sharee", add a file, and get encrypted JSON again
auto encryptedMetadataCopy = encryptedMetadata;
encryptedMetadataCopy.replace("\"", "\\\"");
QJsonDocument ocsDoc =
QJsonDocument::fromJson(QStringLiteral("{\"ocs\": {\"data\": {\"meta-data\": \"%1\"}}}").arg(QString::fromUtf8(encryptedMetadataCopy)).toUtf8());
QScopedPointer<FolderMetadata> metadataFromJsonForSecondUser(new FolderMetadata(_secondAccount, "/", ocsDoc.toJson(), RootEncryptedFolderInfo::makeDefault(), signature));
QSignalSpy metadataSetupExistingCompleteSpy(metadataFromJsonForSecondUser.data(), &FolderMetadata::setupComplete);
metadataSetupExistingCompleteSpy.wait();
QCOMPARE(metadataSetupExistingCompleteSpy.count(), 1);
QEXPECT_FAIL("", "to be fixed later or removed entirely", Continue);
QVERIFY(metadataFromJsonForSecondUser->isValid());
const auto fakeFileNameFromSecondUser = "fakefileFromSecondUser.txt";
encryptedFile.encryptionKey = EncryptionHelper::generateRandom(16);
encryptedFile.encryptedFilename = EncryptionHelper::generateRandomFilename();
encryptedFile.originalFilename = fakeFileNameFromSecondUser;
encryptedFile.mimetype = "application/octet-stream";
encryptedFile.initializationVector = EncryptionHelper::generateRandom(16);
metadataFromJsonForSecondUser->addEncryptedFile(encryptedFile);
auto encryptedMetadataFromSecondUser = metadataFromJsonForSecondUser->encryptedMetadata();
encryptedMetadataFromSecondUser.replace("\"", "\\\"");
const auto signatureAfterSecondUserModification = metadataFromJsonForSecondUser->metadataSignature();
QVERIFY(!signatureAfterSecondUserModification.isEmpty());
QJsonDocument ocsDocFromSecondUser = QJsonDocument::fromJson(
QStringLiteral("{\"ocs\": {\"data\": {\"meta-data\": \"%1\"}}}").arg(QString::fromUtf8(encryptedMetadataFromSecondUser)).toUtf8());
QScopedPointer<FolderMetadata> metadataFromJsonForFirstUserToCheckCrossSharing(new FolderMetadata(_account, "/",
ocsDocFromSecondUser.toJson(),
RootEncryptedFolderInfo::makeDefault(),
signatureAfterSecondUserModification));
QSignalSpy metadataSetupForCrossSharingCompleteSpy(metadataFromJsonForFirstUserToCheckCrossSharing.data(), &FolderMetadata::setupComplete);
metadataSetupForCrossSharingCompleteSpy.wait();
QCOMPARE(metadataSetupForCrossSharingCompleteSpy.count(), 1);
QVERIFY(metadataFromJsonForFirstUserToCheckCrossSharing->isValid());
// now, check if the first user can decrypt metadata and get the file info added by the second user "sharee"
const auto encryptedMetadataForFirstUserCrossSharing = metadataFromJsonForFirstUserToCheckCrossSharing->encryptedMetadata();
QVERIFY(!encryptedMetadataForFirstUserCrossSharing.isEmpty());
const auto metaDataDocForFirstUserCrossSharing = QJsonDocument::fromJson(encryptedMetadataForFirstUserCrossSharing);
const auto folderUsersForFirstUserCrossSharing = metaDataDocForFirstUserCrossSharing["users"].toArray();
QVERIFY(!folderUsers.isEmpty());
// make sure metadata setup was a success and we can parse and decrypt it with a second account "sharee"
auto isFirstUserPresentAndCanDecrypt = false;
for (auto it = folderUsersForFirstUserCrossSharing.constBegin(); it != folderUsersForFirstUserCrossSharing.constEnd(); ++it) {
const auto folderUserObject = it->toObject();
const auto userId = folderUserObject.value("userId").toString();
if (userId != _secondAccount->davUser()) {
continue;
}
const auto certificatePem = folderUserObject.value("certificate").toString().toUtf8();
const auto certificate = QSslCertificate{certificatePem};
const auto encryptedMetadataKey = QByteArray::fromBase64(folderUserObject.value("encryptedMetadataKey").toString().toUtf8());
if (!encryptedMetadataKey.isEmpty()) {
const auto decryptedMetadataKey = metadata->decryptDataWithPrivateKey(encryptedMetadataKey);
if (decryptedMetadataKey.isEmpty()) {
break;
}
const auto metadataObj = metaDataDocForFirstUserCrossSharing.object()["metadata"].toObject();
const auto cipherTextEncrypted = metadataObj["ciphertext"].toString().toLocal8Bit();
// for compatibility, the format is "cipheredpart|initializationVector", so we need to extract the "cipheredpart"
const auto cipherTextPartExtracted = cipherTextEncrypted.split('|').at(0);
const auto nonce = QByteArray::fromBase64(metadataObj["nonce"].toString().toLocal8Bit());
const auto cipherTextDecrypted =
EncryptionHelper::decryptThenUnGzipData(decryptedMetadataKey, QByteArray::fromBase64(cipherTextPartExtracted), nonce);
if (cipherTextDecrypted.isEmpty()) {
break;
}
const auto cipherTextDocument = QJsonDocument::fromJson(cipherTextDecrypted);
const auto files = cipherTextDocument.object()["files"].toObject();
if (files.isEmpty()) {
break;
}
FolderMetadata::EncryptedFile foundFile;
for (auto it = files.constBegin(), end = files.constEnd(); it != end; ++it) {
const auto parsedEncryptedFile = metadata->parseEncryptedFileFromJson(it.key(), it.value());
if (!parsedEncryptedFile.originalFilename.isEmpty() && parsedEncryptedFile.originalFilename == fakeFileNameFromSecondUser) {
foundFile = parsedEncryptedFile;
}
}
QCOMPARE(foundFile.originalFilename, fakeFileNameFromSecondUser);
isFirstUserPresentAndCanDecrypt = true;
break;
}
}
QVERIFY(isFirstUserPresentAndCanDecrypt);
}
};
QTEST_GUILESS_MAIN(TestClientSideEncryptionV2)
#include "testclientsideencryptionv2.moc"
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