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237 lines
9.8 KiB
237 lines
9.8 KiB
3 years ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.MongoDBAWS = void 0;
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const crypto = require("crypto");
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const http = require("http");
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const url = require("url");
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const BSON = require("../../bson");
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const deps_1 = require("../../deps");
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const error_1 = require("../../error");
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const utils_1 = require("../../utils");
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const auth_provider_1 = require("./auth_provider");
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const mongo_credentials_1 = require("./mongo_credentials");
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const providers_1 = require("./providers");
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const ASCII_N = 110;
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const AWS_RELATIVE_URI = 'http://169.254.170.2';
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const AWS_EC2_URI = 'http://169.254.169.254';
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const AWS_EC2_PATH = '/latest/meta-data/iam/security-credentials';
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const bsonOptions = {
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promoteLongs: true,
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promoteValues: true,
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promoteBuffers: false,
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bsonRegExp: false
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};
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class MongoDBAWS extends auth_provider_1.AuthProvider {
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auth(authContext, callback) {
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const { connection, credentials } = authContext;
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if (!credentials) {
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return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
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}
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if ('kModuleError' in deps_1.aws4) {
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return callback(deps_1.aws4['kModuleError']);
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}
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const { sign } = deps_1.aws4;
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if ((0, utils_1.maxWireVersion)(connection) < 9) {
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callback(new error_1.MongoCompatibilityError('MONGODB-AWS authentication requires MongoDB version 4.4 or later'));
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return;
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}
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if (!credentials.username) {
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makeTempCredentials(credentials, (err, tempCredentials) => {
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if (err || !tempCredentials)
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return callback(err);
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authContext.credentials = tempCredentials;
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this.auth(authContext, callback);
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});
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return;
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}
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const accessKeyId = credentials.username;
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const secretAccessKey = credentials.password;
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const sessionToken = credentials.mechanismProperties.AWS_SESSION_TOKEN;
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// If all three defined, include sessionToken, else include username and pass, else no credentials
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const awsCredentials = accessKeyId && secretAccessKey && sessionToken
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? { accessKeyId, secretAccessKey, sessionToken }
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: accessKeyId && secretAccessKey
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? { accessKeyId, secretAccessKey }
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: undefined;
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const db = credentials.source;
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crypto.randomBytes(32, (err, nonce) => {
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if (err) {
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callback(err);
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return;
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}
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const saslStart = {
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saslStart: 1,
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mechanism: 'MONGODB-AWS',
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payload: BSON.serialize({ r: nonce, p: ASCII_N }, bsonOptions)
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};
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connection.command((0, utils_1.ns)(`${db}.$cmd`), saslStart, undefined, (err, res) => {
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if (err)
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return callback(err);
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const serverResponse = BSON.deserialize(res.payload.buffer, bsonOptions);
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const host = serverResponse.h;
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const serverNonce = serverResponse.s.buffer;
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if (serverNonce.length !== 64) {
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callback(
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// TODO(NODE-3483)
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new error_1.MongoRuntimeError(`Invalid server nonce length ${serverNonce.length}, expected 64`));
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return;
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}
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if (!utils_1.ByteUtils.equals(serverNonce.subarray(0, nonce.byteLength), nonce)) {
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// throw because the serverNonce's leading 32 bytes must equal the client nonce's 32 bytes
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// https://github.com/mongodb/specifications/blob/875446db44aade414011731840831f38a6c668df/source/auth/auth.rst#id11
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// TODO(NODE-3483)
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callback(new error_1.MongoRuntimeError('Server nonce does not begin with client nonce'));
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return;
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}
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if (host.length < 1 || host.length > 255 || host.indexOf('..') !== -1) {
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// TODO(NODE-3483)
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callback(new error_1.MongoRuntimeError(`Server returned an invalid host: "${host}"`));
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return;
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}
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const body = 'Action=GetCallerIdentity&Version=2011-06-15';
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const options = sign({
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method: 'POST',
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host,
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region: deriveRegion(serverResponse.h),
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service: 'sts',
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded',
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'Content-Length': body.length,
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'X-MongoDB-Server-Nonce': utils_1.ByteUtils.toBase64(serverNonce),
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'X-MongoDB-GS2-CB-Flag': 'n'
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},
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path: '/',
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body
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}, awsCredentials);
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const payload = {
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a: options.headers.Authorization,
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d: options.headers['X-Amz-Date']
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};
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if (sessionToken) {
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payload.t = sessionToken;
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}
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const saslContinue = {
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saslContinue: 1,
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conversationId: 1,
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payload: BSON.serialize(payload, bsonOptions)
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};
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connection.command((0, utils_1.ns)(`${db}.$cmd`), saslContinue, undefined, callback);
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});
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});
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}
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}
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exports.MongoDBAWS = MongoDBAWS;
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function makeTempCredentials(credentials, callback) {
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function done(creds) {
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if (!creds.AccessKeyId || !creds.SecretAccessKey || !creds.Token) {
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callback(new error_1.MongoMissingCredentialsError('Could not obtain temporary MONGODB-AWS credentials'));
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return;
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}
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callback(undefined, new mongo_credentials_1.MongoCredentials({
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username: creds.AccessKeyId,
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password: creds.SecretAccessKey,
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source: credentials.source,
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mechanism: providers_1.AuthMechanism.MONGODB_AWS,
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mechanismProperties: {
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AWS_SESSION_TOKEN: creds.Token
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}
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}));
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}
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const credentialProvider = (0, deps_1.getAwsCredentialProvider)();
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// Check if the AWS credential provider from the SDK is present. If not,
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// use the old method.
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if ('kModuleError' in credentialProvider) {
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// If the environment variable AWS_CONTAINER_CREDENTIALS_RELATIVE_URI
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// is set then drivers MUST assume that it was set by an AWS ECS agent
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if (process.env.AWS_CONTAINER_CREDENTIALS_RELATIVE_URI) {
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request(`${AWS_RELATIVE_URI}${process.env.AWS_CONTAINER_CREDENTIALS_RELATIVE_URI}`, undefined, (err, res) => {
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if (err)
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return callback(err);
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done(res);
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});
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return;
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}
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// Otherwise assume we are on an EC2 instance
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// get a token
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request(`${AWS_EC2_URI}/latest/api/token`, { method: 'PUT', json: false, headers: { 'X-aws-ec2-metadata-token-ttl-seconds': 30 } }, (err, token) => {
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if (err)
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return callback(err);
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// get role name
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request(`${AWS_EC2_URI}/${AWS_EC2_PATH}`, { json: false, headers: { 'X-aws-ec2-metadata-token': token } }, (err, roleName) => {
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if (err)
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return callback(err);
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// get temp credentials
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request(`${AWS_EC2_URI}/${AWS_EC2_PATH}/${roleName}`, { headers: { 'X-aws-ec2-metadata-token': token } }, (err, creds) => {
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if (err)
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return callback(err);
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done(creds);
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});
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});
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});
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}
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else {
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/*
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* Creates a credential provider that will attempt to find credentials from the
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* following sources (listed in order of precedence):
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*
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* - Environment variables exposed via process.env
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* - SSO credentials from token cache
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* - Web identity token credentials
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* - Shared credentials and config ini files
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* - The EC2/ECS Instance Metadata Service
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*/
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const { fromNodeProviderChain } = credentialProvider;
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const provider = fromNodeProviderChain();
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provider()
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.then((creds) => {
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done({
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AccessKeyId: creds.accessKeyId,
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SecretAccessKey: creds.secretAccessKey,
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Token: creds.sessionToken,
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Expiration: creds.expiration
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});
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})
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.catch((error) => {
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callback(new error_1.MongoAWSError(error.message));
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});
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}
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}
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function deriveRegion(host) {
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const parts = host.split('.');
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if (parts.length === 1 || parts[1] === 'amazonaws') {
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return 'us-east-1';
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}
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return parts[1];
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}
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function request(uri, _options, callback) {
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const options = Object.assign({
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method: 'GET',
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timeout: 10000,
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json: true
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}, url.parse(uri), _options);
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const req = http.request(options, res => {
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res.setEncoding('utf8');
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let data = '';
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res.on('data', d => (data += d));
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res.on('end', () => {
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if (options.json === false) {
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callback(undefined, data);
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return;
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}
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try {
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const parsed = JSON.parse(data);
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callback(undefined, parsed);
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}
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catch (err) {
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// TODO(NODE-3483)
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callback(new error_1.MongoRuntimeError(`Invalid JSON response: "${data}"`));
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}
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});
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});
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req.on('timeout', () => {
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req.destroy(new error_1.MongoAWSError(`AWS request to ${uri} timed out after ${options.timeout} ms`));
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});
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req.on('error', err => callback(err));
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req.end();
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}
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//# sourceMappingURL=mongodb_aws.js.map
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