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* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect, vi, beforeEach } from 'vitest';
import * as fs from 'node:fs';
import * as path from 'node:path';
import { ExtensionIntegrityManager, IntegrityDataStatus } from './integrity.js';
import type { ExtensionInstallMetadata } from '../config.js';
const mockKeychainService = {
isAvailable: vi.fn(),
getPassword: vi.fn(),
setPassword: vi.fn(),
};
vi.mock('../../services/keychainService.js', () => ({
KeychainService: vi.fn().mockImplementation(() => mockKeychainService),
}));
vi.mock('../../utils/paths.js', async (importOriginal) => {
const actual = await importOriginal<typeof import('../../utils/paths.js')>();
return {
...actual,
homedir: () => '/mock/home',
GEMINI_DIR: '.gemini',
};
});
vi.mock('node:fs', async (importOriginal) => {
const actual = await importOriginal<typeof import('node:fs')>();
return {
...actual,
promises: {
...actual.promises,
readFile: vi.fn(),
writeFile: vi.fn(),
mkdir: vi.fn().mockResolvedValue(undefined),
rename: vi.fn().mockResolvedValue(undefined),
},
};
});
describe('ExtensionIntegrityManager', () => {
let manager: ExtensionIntegrityManager;
beforeEach(() => {
vi.clearAllMocks();
manager = new ExtensionIntegrityManager();
mockKeychainService.isAvailable.mockResolvedValue(true);
mockKeychainService.getPassword.mockResolvedValue('test-key');
mockKeychainService.setPassword.mockResolvedValue(undefined);
});
describe('getSecretKey', () => {
it('should retrieve key from keychain if available', async () => {
const key = await manager.getSecretKey();
expect(key).toBe('test-key');
expect(mockKeychainService.getPassword).toHaveBeenCalledWith(
'secret-key',
);
});
it('should generate and store key in keychain if not exists', async () => {
mockKeychainService.getPassword.mockResolvedValue(null);
const key = await manager.getSecretKey();
expect(key).toHaveLength(64);
expect(mockKeychainService.setPassword).toHaveBeenCalledWith(
'secret-key',
key,
);
});
it('should fallback to file-based key if keychain is unavailable', async () => {
mockKeychainService.isAvailable.mockResolvedValue(false);
vi.mocked(fs.promises.readFile).mockResolvedValueOnce('file-key');
const key = await manager.getSecretKey();
expect(key).toBe('file-key');
});
it('should generate and store file-based key if not exists', async () => {
mockKeychainService.isAvailable.mockResolvedValue(false);
vi.mocked(fs.promises.readFile).mockRejectedValueOnce(
Object.assign(new Error(), { code: 'ENOENT' }),
);
const key = await manager.getSecretKey();
expect(key).toBeDefined();
expect(fs.promises.writeFile).toHaveBeenCalledWith(
path.join('/mock/home', '.gemini', 'integrity.key'),
key,
{ mode: 0o600 },
);
});
});
describe('store and verify', () => {
const metadata: ExtensionInstallMetadata = {
source: 'https://github.com/user/ext',
type: 'git',
};
let storedContent = '';
beforeEach(() => {
storedContent = '';
const isIntegrityStore = (p: unknown) =>
typeof p === 'string' &&
(p.endsWith('extension_integrity.json') ||
p.endsWith('extension_integrity.json.tmp'));
vi.mocked(fs.promises.writeFile).mockImplementation(
async (p, content) => {
if (isIntegrityStore(p)) {
storedContent = content as string;
}
},
);
vi.mocked(fs.promises.readFile).mockImplementation(async (p) => {
if (isIntegrityStore(p)) {
if (!storedContent) {
throw Object.assign(new Error('File not found'), {
code: 'ENOENT',
});
}
return storedContent;
}
return '';
});
vi.mocked(fs.promises.rename).mockResolvedValue(undefined);
});
it('should store and verify integrity successfully', async () => {
await manager.store('ext-name', metadata);
const result = await manager.verify('ext-name', metadata);
expect(result).toBe(IntegrityDataStatus.VERIFIED);
expect(fs.promises.rename).toHaveBeenCalled();
});
it('should return MISSING if metadata record is missing from store', async () => {
const result = await manager.verify('unknown-ext', metadata);
expect(result).toBe(IntegrityDataStatus.MISSING);
});
it('should return INVALID if metadata content changes', async () => {
await manager.store('ext-name', metadata);
const modifiedMetadata: ExtensionInstallMetadata = {
...metadata,
source: 'https://github.com/attacker/ext',
};
const result = await manager.verify('ext-name', modifiedMetadata);
expect(result).toBe(IntegrityDataStatus.INVALID);
});
it('should return INVALID if store signature is modified', async () => {
await manager.store('ext-name', metadata);
const data = JSON.parse(storedContent);
data.signature = 'invalid-signature';
storedContent = JSON.stringify(data);
const result = await manager.verify('ext-name', metadata);
expect(result).toBe(IntegrityDataStatus.INVALID);
});
it('should return INVALID if signature length mismatches (e.g. truncated data)', async () => {
await manager.store('ext-name', metadata);
const data = JSON.parse(storedContent);
data.signature = 'abc';
storedContent = JSON.stringify(data);
const result = await manager.verify('ext-name', metadata);
expect(result).toBe(IntegrityDataStatus.INVALID);
});
it('should throw error in store if existing store is modified', async () => {
await manager.store('ext-name', metadata);
const data = JSON.parse(storedContent);
data.store['another-ext'] = { hash: 'fake', signature: 'fake' };
storedContent = JSON.stringify(data);
await expect(manager.store('other-ext', metadata)).rejects.toThrow(
'Extension integrity store cannot be verified',
);
});
it('should throw error in store if store file is corrupted', async () => {
storedContent = 'not-json';
await expect(manager.store('other-ext', metadata)).rejects.toThrow(
'Failed to parse extension integrity store',
);
});
});
});
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