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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "base/run_loop.h"
#include "base/strings/string_util.h"
#include "base/test/bind.h"
#include "base/test/task_environment.h"
#include "base/test/test_future.h"
#include "components/os_crypt/async/browser/fallback_linux_key_provider.h"
#include "components/os_crypt/async/browser/freedesktop_secret_key_provider.h"
#include "components/os_crypt/async/browser/os_crypt_async.h"
#include "components/os_crypt/sync/key_storage_linux.h"
#include "components/os_crypt/sync/os_crypt.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace os_crypt_async {
namespace {
constexpr char kSecretKey[] = "the_secret_key";
constexpr char kPlaintext[] = "the_secret_plaintext";
class OSCryptMockerLinux : public KeyStorageLinux {
public:
OSCryptMockerLinux() = default;
OSCryptMockerLinux(const OSCryptMockerLinux&) = delete;
OSCryptMockerLinux& operator=(const OSCryptMockerLinux&) = delete;
~OSCryptMockerLinux() override = default;
bool Init() override { return true; }
std::optional<std::string> GetKeyImpl() override { return std::nullopt; }
};
std::unique_ptr<KeyStorageLinux> CreateNewMock() {
return std::make_unique<OSCryptMockerLinux>();
}
} // namespace
// This class tests that FreedesktopSecretKeyProvider is forwards and backwards
// compatible with OSCrypt.
class FreedesktopSecretKeyProviderCompatTest : public ::testing::Test {
protected:
Encryptor GetEncryptorInstance(bool v11) {
std::vector<std::pair<size_t, std::unique_ptr<KeyProvider>>> providers;
if (v11) {
auto provider = std::make_unique<FreedesktopSecretKeyProvider>(
"gnome-libsecret",
/*use_for_encryption=*/true, "", nullptr);
provider->secret_for_testing_ = kSecretKey;
providers.emplace_back(0, std::move(provider));
} else {
providers.emplace_back(0, std::make_unique<FallbackLinuxKeyProvider>(
/*use_for_encryption=*/true));
}
OSCryptAsync factory(std::move(providers));
base::test::TestFuture<Encryptor> future;
factory.GetInstance(future.GetCallback(), Encryptor::Option::kNone);
return future.Take();
}
void TearDown() override { OSCrypt::ClearCacheForTesting(); }
base::test::TaskEnvironment task_environment_;
};
TEST_F(FreedesktopSecretKeyProviderCompatTest, IsAvailable) {
OSCrypt::SetEncryptionPasswordForTesting(kSecretKey);
Encryptor encryptor = GetEncryptorInstance(/*v11=*/true);
ASSERT_TRUE(encryptor.IsEncryptionAvailable());
ASSERT_TRUE(encryptor.IsDecryptionAvailable());
}
TEST_F(FreedesktopSecretKeyProviderCompatTest, DecryptOldV11) {
OSCrypt::SetEncryptionPasswordForTesting(kSecretKey);
Encryptor encryptor = GetEncryptorInstance(/*v11=*/true);
std::string ciphertext;
ASSERT_TRUE(OSCrypt::EncryptString(kPlaintext, &ciphertext));
EXPECT_TRUE(base::StartsWith(ciphertext, "v11"));
std::string decrypted;
EXPECT_TRUE(encryptor.DecryptString(ciphertext, &decrypted));
EXPECT_EQ(kPlaintext, decrypted);
}
TEST_F(FreedesktopSecretKeyProviderCompatTest, EncryptForOldV11) {
OSCrypt::SetEncryptionPasswordForTesting(kSecretKey);
Encryptor encryptor = GetEncryptorInstance(/*v11=*/true);
std::string ciphertext;
ASSERT_TRUE(encryptor.EncryptString(kPlaintext, &ciphertext));
EXPECT_TRUE(base::StartsWith(ciphertext, "v11"));
std::string decrypted;
EXPECT_TRUE(OSCrypt::DecryptString(ciphertext, &decrypted));
EXPECT_EQ(kPlaintext, decrypted);
}
TEST_F(FreedesktopSecretKeyProviderCompatTest, DecryptOldV10) {
OSCrypt::UseMockKeyStorageForTesting(base::BindOnce(&CreateNewMock));
Encryptor encryptor = GetEncryptorInstance(/*v11=*/false);
std::string ciphertext;
ASSERT_TRUE(OSCrypt::EncryptString(kPlaintext, &ciphertext));
EXPECT_TRUE(base::StartsWith(ciphertext, "v10"));
std::string decrypted;
EXPECT_TRUE(encryptor.DecryptString(ciphertext, &decrypted));
EXPECT_EQ(kPlaintext, decrypted);
}
TEST_F(FreedesktopSecretKeyProviderCompatTest, EncryptForOldV10) {
OSCrypt::UseMockKeyStorageForTesting(base::BindOnce(&CreateNewMock));
Encryptor encryptor = GetEncryptorInstance(/*v11=*/false);
std::string ciphertext;
ASSERT_TRUE(encryptor.EncryptString(kPlaintext, &ciphertext));
EXPECT_TRUE(base::StartsWith(ciphertext, "v10"));
std::string decrypted;
EXPECT_TRUE(OSCrypt::DecryptString(ciphertext, &decrypted));
EXPECT_EQ(kPlaintext, decrypted);
}
} // namespace os_crypt_async
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