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426 lines
19 KiB
426 lines
19 KiB
3 months ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.StateMachine = void 0;
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const fs = require("fs/promises");
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const net = require("net");
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const tls = require("tls");
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const bson_1 = require("../bson");
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const abstract_cursor_1 = require("../cursor/abstract_cursor");
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const deps_1 = require("../deps");
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const error_1 = require("../error");
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const timeout_1 = require("../timeout");
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const utils_1 = require("../utils");
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const client_encryption_1 = require("./client_encryption");
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const errors_1 = require("./errors");
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let socks = null;
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function loadSocks() {
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if (socks == null) {
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const socksImport = (0, deps_1.getSocks)();
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if ('kModuleError' in socksImport) {
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throw socksImport.kModuleError;
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}
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socks = socksImport;
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}
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return socks;
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}
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// libmongocrypt states
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const MONGOCRYPT_CTX_ERROR = 0;
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const MONGOCRYPT_CTX_NEED_MONGO_COLLINFO = 1;
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const MONGOCRYPT_CTX_NEED_MONGO_MARKINGS = 2;
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const MONGOCRYPT_CTX_NEED_MONGO_KEYS = 3;
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const MONGOCRYPT_CTX_NEED_KMS_CREDENTIALS = 7;
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const MONGOCRYPT_CTX_NEED_KMS = 4;
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const MONGOCRYPT_CTX_READY = 5;
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const MONGOCRYPT_CTX_DONE = 6;
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const HTTPS_PORT = 443;
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const stateToString = new Map([
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[MONGOCRYPT_CTX_ERROR, 'MONGOCRYPT_CTX_ERROR'],
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[MONGOCRYPT_CTX_NEED_MONGO_COLLINFO, 'MONGOCRYPT_CTX_NEED_MONGO_COLLINFO'],
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[MONGOCRYPT_CTX_NEED_MONGO_MARKINGS, 'MONGOCRYPT_CTX_NEED_MONGO_MARKINGS'],
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[MONGOCRYPT_CTX_NEED_MONGO_KEYS, 'MONGOCRYPT_CTX_NEED_MONGO_KEYS'],
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[MONGOCRYPT_CTX_NEED_KMS_CREDENTIALS, 'MONGOCRYPT_CTX_NEED_KMS_CREDENTIALS'],
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[MONGOCRYPT_CTX_NEED_KMS, 'MONGOCRYPT_CTX_NEED_KMS'],
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[MONGOCRYPT_CTX_READY, 'MONGOCRYPT_CTX_READY'],
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[MONGOCRYPT_CTX_DONE, 'MONGOCRYPT_CTX_DONE']
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]);
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const INSECURE_TLS_OPTIONS = [
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'tlsInsecure',
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'tlsAllowInvalidCertificates',
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'tlsAllowInvalidHostnames',
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// These options are disallowed by the spec, so we explicitly filter them out if provided, even
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// though the StateMachine does not declare support for these options.
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'tlsDisableOCSPEndpointCheck',
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'tlsDisableCertificateRevocationCheck'
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];
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/**
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* Helper function for logging. Enabled by setting the environment flag MONGODB_CRYPT_DEBUG.
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* @param msg - Anything you want to be logged.
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*/
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function debug(msg) {
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if (process.env.MONGODB_CRYPT_DEBUG) {
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// eslint-disable-next-line no-console
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console.error(msg);
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}
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}
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/**
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* This is kind of a hack. For `rewrapManyDataKey`, we have tests that
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* guarantee that when there are no matching keys, `rewrapManyDataKey` returns
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* nothing. We also have tests for auto encryption that guarantee for `encrypt`
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* we return an error when there are no matching keys. This error is generated in
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* subsequent iterations of the state machine.
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* Some apis (`encrypt`) throw if there are no filter matches and others (`rewrapManyDataKey`)
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* do not. We set the result manually here, and let the state machine continue. `libmongocrypt`
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* will inform us if we need to error by setting the state to `MONGOCRYPT_CTX_ERROR` but
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* otherwise we'll return `{ v: [] }`.
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*/
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let EMPTY_V;
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/**
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* @internal
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* An internal class that executes across a MongoCryptContext until either
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* a finishing state or an error is reached. Do not instantiate directly.
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*/
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// TODO(DRIVERS-2671): clarify CSOT behavior for FLE APIs
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class StateMachine {
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constructor(options, bsonOptions = (0, bson_1.pluckBSONSerializeOptions)(options)) {
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this.options = options;
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this.bsonOptions = bsonOptions;
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}
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/**
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* Executes the state machine according to the specification
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*/
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async execute(executor, context, options) {
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const keyVaultNamespace = executor._keyVaultNamespace;
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const keyVaultClient = executor._keyVaultClient;
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const metaDataClient = executor._metaDataClient;
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const mongocryptdClient = executor._mongocryptdClient;
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const mongocryptdManager = executor._mongocryptdManager;
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let result = null;
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// Typescript treats getters just like properties: Once you've tested it for equality
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// it cannot change. Which is exactly the opposite of what we use state and status for.
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// Every call to at least `addMongoOperationResponse` and `finalize` can change the state.
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// These wrappers let us write code more naturally and not add compiler exceptions
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// to conditions checks inside the state machine.
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const getStatus = () => context.status;
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const getState = () => context.state;
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while (getState() !== MONGOCRYPT_CTX_DONE && getState() !== MONGOCRYPT_CTX_ERROR) {
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options.signal?.throwIfAborted();
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debug(`[context#${context.id}] ${stateToString.get(getState()) || getState()}`);
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switch (getState()) {
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case MONGOCRYPT_CTX_NEED_MONGO_COLLINFO: {
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const filter = (0, bson_1.deserialize)(context.nextMongoOperation());
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if (!metaDataClient) {
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throw new errors_1.MongoCryptError('unreachable state machine state: entered MONGOCRYPT_CTX_NEED_MONGO_COLLINFO but metadata client is undefined');
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}
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const collInfoCursor = this.fetchCollectionInfo(metaDataClient, context.ns, filter, options);
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for await (const collInfo of collInfoCursor) {
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context.addMongoOperationResponse((0, bson_1.serialize)(collInfo));
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if (getState() === MONGOCRYPT_CTX_ERROR)
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break;
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}
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if (getState() === MONGOCRYPT_CTX_ERROR)
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break;
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context.finishMongoOperation();
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break;
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}
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case MONGOCRYPT_CTX_NEED_MONGO_MARKINGS: {
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const command = context.nextMongoOperation();
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if (getState() === MONGOCRYPT_CTX_ERROR)
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break;
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if (!mongocryptdClient) {
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throw new errors_1.MongoCryptError('unreachable state machine state: entered MONGOCRYPT_CTX_NEED_MONGO_MARKINGS but mongocryptdClient is undefined');
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}
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// When we are using the shared library, we don't have a mongocryptd manager.
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const markedCommand = mongocryptdManager
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? await mongocryptdManager.withRespawn(this.markCommand.bind(this, mongocryptdClient, context.ns, command, options))
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: await this.markCommand(mongocryptdClient, context.ns, command, options);
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context.addMongoOperationResponse(markedCommand);
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context.finishMongoOperation();
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break;
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}
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case MONGOCRYPT_CTX_NEED_MONGO_KEYS: {
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const filter = context.nextMongoOperation();
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const keys = await this.fetchKeys(keyVaultClient, keyVaultNamespace, filter, options);
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if (keys.length === 0) {
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// See docs on EMPTY_V
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result = EMPTY_V ??= (0, bson_1.serialize)({ v: [] });
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}
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for await (const key of keys) {
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context.addMongoOperationResponse((0, bson_1.serialize)(key));
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}
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context.finishMongoOperation();
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break;
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}
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case MONGOCRYPT_CTX_NEED_KMS_CREDENTIALS: {
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const kmsProviders = await executor.askForKMSCredentials();
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context.provideKMSProviders((0, bson_1.serialize)(kmsProviders));
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break;
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}
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case MONGOCRYPT_CTX_NEED_KMS: {
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await Promise.all(this.requests(context, options));
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context.finishKMSRequests();
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break;
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}
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case MONGOCRYPT_CTX_READY: {
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const finalizedContext = context.finalize();
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if (getState() === MONGOCRYPT_CTX_ERROR) {
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const message = getStatus().message || 'Finalization error';
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throw new errors_1.MongoCryptError(message);
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}
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result = finalizedContext;
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break;
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}
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default:
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throw new errors_1.MongoCryptError(`Unknown state: ${getState()}`);
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}
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}
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if (getState() === MONGOCRYPT_CTX_ERROR || result == null) {
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const message = getStatus().message;
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if (!message) {
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debug(`unidentifiable error in MongoCrypt - received an error status from \`libmongocrypt\` but received no error message.`);
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}
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throw new errors_1.MongoCryptError(message ??
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'unidentifiable error in MongoCrypt - received an error status from `libmongocrypt` but received no error message.');
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}
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return result;
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}
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/**
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* Handles the request to the KMS service. Exposed for testing purposes. Do not directly invoke.
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* @param kmsContext - A C++ KMS context returned from the bindings
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* @returns A promise that resolves when the KMS reply has be fully parsed
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*/
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async kmsRequest(request, options) {
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const parsedUrl = request.endpoint.split(':');
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const port = parsedUrl[1] != null ? Number.parseInt(parsedUrl[1], 10) : HTTPS_PORT;
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const socketOptions = {
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host: parsedUrl[0],
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servername: parsedUrl[0],
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port,
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...(0, client_encryption_1.autoSelectSocketOptions)(this.options.socketOptions || {})
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};
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const message = request.message;
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const buffer = new utils_1.BufferPool();
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let netSocket;
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let socket;
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function destroySockets() {
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for (const sock of [socket, netSocket]) {
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if (sock) {
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sock.destroy();
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}
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}
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}
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function onerror(cause) {
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return new errors_1.MongoCryptError('KMS request failed', { cause });
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}
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function onclose() {
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return new errors_1.MongoCryptError('KMS request closed');
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}
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const tlsOptions = this.options.tlsOptions;
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if (tlsOptions) {
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const kmsProvider = request.kmsProvider;
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const providerTlsOptions = tlsOptions[kmsProvider];
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if (providerTlsOptions) {
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const error = this.validateTlsOptions(kmsProvider, providerTlsOptions);
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if (error) {
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throw error;
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}
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try {
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await this.setTlsOptions(providerTlsOptions, socketOptions);
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}
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catch (err) {
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throw onerror(err);
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}
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}
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}
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let abortListener;
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try {
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if (this.options.proxyOptions && this.options.proxyOptions.proxyHost) {
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netSocket = new net.Socket();
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const { promise: willConnect, reject: rejectOnNetSocketError, resolve: resolveOnNetSocketConnect } = (0, utils_1.promiseWithResolvers)();
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netSocket
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.once('error', err => rejectOnNetSocketError(onerror(err)))
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.once('close', () => rejectOnNetSocketError(onclose()))
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.once('connect', () => resolveOnNetSocketConnect());
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const netSocketOptions = {
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...socketOptions,
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host: this.options.proxyOptions.proxyHost,
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port: this.options.proxyOptions.proxyPort || 1080
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};
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netSocket.connect(netSocketOptions);
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await willConnect;
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try {
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socks ??= loadSocks();
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socketOptions.socket = (await socks.SocksClient.createConnection({
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existing_socket: netSocket,
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command: 'connect',
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destination: { host: socketOptions.host, port: socketOptions.port },
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proxy: {
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// host and port are ignored because we pass existing_socket
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host: 'iLoveJavaScript',
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port: 0,
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type: 5,
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userId: this.options.proxyOptions.proxyUsername,
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password: this.options.proxyOptions.proxyPassword
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}
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})).socket;
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}
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catch (err) {
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throw onerror(err);
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}
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}
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socket = tls.connect(socketOptions, () => {
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socket.write(message);
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});
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const { promise: willResolveKmsRequest, reject: rejectOnTlsSocketError, resolve } = (0, utils_1.promiseWithResolvers)();
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abortListener = (0, utils_1.addAbortListener)(options?.signal, function () {
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destroySockets();
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rejectOnTlsSocketError(this.reason);
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});
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socket
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.once('error', err => rejectOnTlsSocketError(onerror(err)))
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.once('close', () => rejectOnTlsSocketError(onclose()))
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.on('data', data => {
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buffer.append(data);
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while (request.bytesNeeded > 0 && buffer.length) {
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const bytesNeeded = Math.min(request.bytesNeeded, buffer.length);
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request.addResponse(buffer.read(bytesNeeded));
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}
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if (request.bytesNeeded <= 0) {
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resolve();
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}
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});
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await (options?.timeoutContext?.csotEnabled()
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? Promise.all([
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willResolveKmsRequest,
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timeout_1.Timeout.expires(options.timeoutContext?.remainingTimeMS)
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])
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: willResolveKmsRequest);
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}
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catch (error) {
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if (error instanceof timeout_1.TimeoutError)
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throw new error_1.MongoOperationTimeoutError('KMS request timed out');
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throw error;
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}
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finally {
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// There's no need for any more activity on this socket at this point.
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destroySockets();
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abortListener?.[utils_1.kDispose]();
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}
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}
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*requests(context, options) {
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for (let request = context.nextKMSRequest(); request != null; request = context.nextKMSRequest()) {
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yield this.kmsRequest(request, options);
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}
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}
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/**
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* Validates the provided TLS options are secure.
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*
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* @param kmsProvider - The KMS provider name.
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* @param tlsOptions - The client TLS options for the provider.
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*
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* @returns An error if any option is invalid.
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*/
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validateTlsOptions(kmsProvider, tlsOptions) {
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const tlsOptionNames = Object.keys(tlsOptions);
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for (const option of INSECURE_TLS_OPTIONS) {
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if (tlsOptionNames.includes(option)) {
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return new errors_1.MongoCryptError(`Insecure TLS options prohibited for ${kmsProvider}: ${option}`);
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}
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}
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}
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/**
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* Sets only the valid secure TLS options.
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*
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* @param tlsOptions - The client TLS options for the provider.
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* @param options - The existing connection options.
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*/
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async setTlsOptions(tlsOptions, options) {
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if (tlsOptions.tlsCertificateKeyFile) {
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const cert = await fs.readFile(tlsOptions.tlsCertificateKeyFile);
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|
|
options.cert = options.key = cert;
|
||
|
|
}
|
||
|
|
if (tlsOptions.tlsCAFile) {
|
||
|
|
options.ca = await fs.readFile(tlsOptions.tlsCAFile);
|
||
|
|
}
|
||
|
|
if (tlsOptions.tlsCertificateKeyFilePassword) {
|
||
|
|
options.passphrase = tlsOptions.tlsCertificateKeyFilePassword;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Fetches collection info for a provided namespace, when libmongocrypt
|
||
|
|
* enters the `MONGOCRYPT_CTX_NEED_MONGO_COLLINFO` state. The result is
|
||
|
|
* used to inform libmongocrypt of the schema associated with this
|
||
|
|
* namespace. Exposed for testing purposes. Do not directly invoke.
|
||
|
|
*
|
||
|
|
* @param client - A MongoClient connected to the topology
|
||
|
|
* @param ns - The namespace to list collections from
|
||
|
|
* @param filter - A filter for the listCollections command
|
||
|
|
* @param callback - Invoked with the info of the requested collection, or with an error
|
||
|
|
*/
|
||
|
|
fetchCollectionInfo(client, ns, filter, options) {
|
||
|
|
const { db } = utils_1.MongoDBCollectionNamespace.fromString(ns);
|
||
|
|
const cursor = client.db(db).listCollections(filter, {
|
||
|
|
promoteLongs: false,
|
||
|
|
promoteValues: false,
|
||
|
|
timeoutContext: options?.timeoutContext && new abstract_cursor_1.CursorTimeoutContext(options?.timeoutContext, Symbol()),
|
||
|
|
signal: options?.signal,
|
||
|
|
nameOnly: false
|
||
|
|
});
|
||
|
|
return cursor;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Calls to the mongocryptd to provide markings for a command.
|
||
|
|
* Exposed for testing purposes. Do not directly invoke.
|
||
|
|
* @param client - A MongoClient connected to a mongocryptd
|
||
|
|
* @param ns - The namespace (database.collection) the command is being executed on
|
||
|
|
* @param command - The command to execute.
|
||
|
|
* @param callback - Invoked with the serialized and marked bson command, or with an error
|
||
|
|
*/
|
||
|
|
async markCommand(client, ns, command, options) {
|
||
|
|
const { db } = utils_1.MongoDBCollectionNamespace.fromString(ns);
|
||
|
|
const bsonOptions = { promoteLongs: false, promoteValues: false };
|
||
|
|
const rawCommand = (0, bson_1.deserialize)(command, bsonOptions);
|
||
|
|
const commandOptions = {
|
||
|
|
timeoutMS: undefined,
|
||
|
|
signal: undefined
|
||
|
|
};
|
||
|
|
if (options?.timeoutContext?.csotEnabled()) {
|
||
|
|
commandOptions.timeoutMS = options.timeoutContext.remainingTimeMS;
|
||
|
|
}
|
||
|
|
if (options?.signal) {
|
||
|
|
commandOptions.signal = options.signal;
|
||
|
|
}
|
||
|
|
const response = await client.db(db).command(rawCommand, {
|
||
|
|
...bsonOptions,
|
||
|
|
...commandOptions
|
||
|
|
});
|
||
|
|
return (0, bson_1.serialize)(response, this.bsonOptions);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Requests keys from the keyVault collection on the topology.
|
||
|
|
* Exposed for testing purposes. Do not directly invoke.
|
||
|
|
* @param client - A MongoClient connected to the topology
|
||
|
|
* @param keyVaultNamespace - The namespace (database.collection) of the keyVault Collection
|
||
|
|
* @param filter - The filter for the find query against the keyVault Collection
|
||
|
|
* @param callback - Invoked with the found keys, or with an error
|
||
|
|
*/
|
||
|
|
fetchKeys(client, keyVaultNamespace, filter, options) {
|
||
|
|
const { db: dbName, collection: collectionName } = utils_1.MongoDBCollectionNamespace.fromString(keyVaultNamespace);
|
||
|
|
const commandOptions = {
|
||
|
|
timeoutContext: undefined,
|
||
|
|
signal: undefined
|
||
|
|
};
|
||
|
|
if (options?.timeoutContext != null) {
|
||
|
|
commandOptions.timeoutContext = new abstract_cursor_1.CursorTimeoutContext(options.timeoutContext, Symbol());
|
||
|
|
}
|
||
|
|
if (options?.signal != null) {
|
||
|
|
commandOptions.signal = options.signal;
|
||
|
|
}
|
||
|
|
return client
|
||
|
|
.db(dbName)
|
||
|
|
.collection(collectionName, { readConcern: { level: 'majority' } })
|
||
|
|
.find((0, bson_1.deserialize)(filter), commandOptions)
|
||
|
|
.toArray();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exports.StateMachine = StateMachine;
|
||
|
|
//# sourceMappingURL=state_machine.js.map
|