321 lines
14 KiB
JavaScript
321 lines
14 KiB
JavaScript
"use strict";
|
|
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
|
|
if (k2 === undefined) k2 = k;
|
|
var desc = Object.getOwnPropertyDescriptor(m, k);
|
|
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
|
|
desc = { enumerable: true, get: function() { return m[k]; } };
|
|
}
|
|
Object.defineProperty(o, k2, desc);
|
|
}) : (function(o, m, k, k2) {
|
|
if (k2 === undefined) k2 = k;
|
|
o[k2] = m[k];
|
|
}));
|
|
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
|
|
Object.defineProperty(o, "default", { enumerable: true, value: v });
|
|
}) : function(o, v) {
|
|
o["default"] = v;
|
|
});
|
|
var __importStar = (this && this.__importStar) || function (mod) {
|
|
if (mod && mod.__esModule) return mod;
|
|
var result = {};
|
|
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
|
|
__setModuleDefault(result, mod);
|
|
return result;
|
|
};
|
|
var __importDefault = (this && this.__importDefault) || function (mod) {
|
|
return (mod && mod.__esModule) ? mod : { "default": mod };
|
|
};
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.Updater = void 0;
|
|
const models_1 = require("@tufjs/models");
|
|
const debug_1 = __importDefault(require("debug"));
|
|
const fs = __importStar(require("fs"));
|
|
const path = __importStar(require("path"));
|
|
const config_1 = require("./config");
|
|
const error_1 = require("./error");
|
|
const fetcher_1 = require("./fetcher");
|
|
const store_1 = require("./store");
|
|
const url = __importStar(require("./utils/url"));
|
|
const log = (0, debug_1.default)('tuf:cache');
|
|
class Updater {
|
|
constructor(options) {
|
|
const { metadataDir, metadataBaseUrl, targetDir, targetBaseUrl, fetcher, config, } = options;
|
|
this.dir = metadataDir;
|
|
this.metadataBaseUrl = metadataBaseUrl;
|
|
this.targetDir = targetDir;
|
|
this.targetBaseUrl = targetBaseUrl;
|
|
const data = this.loadLocalMetadata(models_1.MetadataKind.Root);
|
|
this.trustedSet = new store_1.TrustedMetadataStore(data);
|
|
this.config = { ...config_1.defaultConfig, ...config };
|
|
this.fetcher =
|
|
fetcher ||
|
|
new fetcher_1.DefaultFetcher({
|
|
timeout: this.config.fetchTimeout,
|
|
retries: this.config.fetchRetries,
|
|
});
|
|
}
|
|
// refresh and load the metadata before downloading the target
|
|
// refresh should be called once after the client is initialized
|
|
async refresh() {
|
|
await this.loadRoot();
|
|
await this.loadTimestamp();
|
|
await this.loadSnapshot();
|
|
await this.loadTargets(models_1.MetadataKind.Targets, models_1.MetadataKind.Root);
|
|
}
|
|
// Returns the TargetFile instance with information for the given target path.
|
|
//
|
|
// Implicitly calls refresh if it hasn't already been called.
|
|
async getTargetInfo(targetPath) {
|
|
if (!this.trustedSet.targets) {
|
|
await this.refresh();
|
|
}
|
|
return this.preorderDepthFirstWalk(targetPath);
|
|
}
|
|
async downloadTarget(targetInfo, filePath, targetBaseUrl) {
|
|
const targetPath = filePath || this.generateTargetPath(targetInfo);
|
|
if (!targetBaseUrl) {
|
|
if (!this.targetBaseUrl) {
|
|
throw new error_1.ValueError('Target base URL not set');
|
|
}
|
|
targetBaseUrl = this.targetBaseUrl;
|
|
}
|
|
let targetFilePath = targetInfo.path;
|
|
const consistentSnapshot = this.trustedSet.root.signed.consistentSnapshot;
|
|
if (consistentSnapshot && this.config.prefixTargetsWithHash) {
|
|
const hashes = Object.values(targetInfo.hashes);
|
|
const { dir, base } = path.parse(targetFilePath);
|
|
const filename = `${hashes[0]}.${base}`;
|
|
targetFilePath = dir ? `${dir}/${filename}` : filename;
|
|
}
|
|
const targetUrl = url.join(targetBaseUrl, targetFilePath);
|
|
// Client workflow 5.7.3: download target file
|
|
await this.fetcher.downloadFile(targetUrl, targetInfo.length, async (fileName) => {
|
|
// Verify hashes and length of downloaded file
|
|
await targetInfo.verify(fs.createReadStream(fileName));
|
|
// Copy file to target path
|
|
log('WRITE %s', targetPath);
|
|
fs.copyFileSync(fileName, targetPath);
|
|
});
|
|
return targetPath;
|
|
}
|
|
async findCachedTarget(targetInfo, filePath) {
|
|
if (!filePath) {
|
|
filePath = this.generateTargetPath(targetInfo);
|
|
}
|
|
try {
|
|
if (fs.existsSync(filePath)) {
|
|
await targetInfo.verify(fs.createReadStream(filePath));
|
|
return filePath;
|
|
}
|
|
}
|
|
catch (error) {
|
|
return; // File not found
|
|
}
|
|
return; // File not found
|
|
}
|
|
loadLocalMetadata(fileName) {
|
|
const filePath = path.join(this.dir, `${fileName}.json`);
|
|
log('READ %s', filePath);
|
|
return fs.readFileSync(filePath);
|
|
}
|
|
// Sequentially load and persist on local disk every newer root metadata
|
|
// version available on the remote.
|
|
// Client workflow 5.3: update root role
|
|
async loadRoot() {
|
|
// Client workflow 5.3.2: version of trusted root metadata file
|
|
const rootVersion = this.trustedSet.root.signed.version;
|
|
const lowerBound = rootVersion + 1;
|
|
const upperBound = lowerBound + this.config.maxRootRotations;
|
|
for (let version = lowerBound; version <= upperBound; version++) {
|
|
const rootUrl = url.join(this.metadataBaseUrl, `${version}.root.json`);
|
|
try {
|
|
// Client workflow 5.3.3: download new root metadata file
|
|
const bytesData = await this.fetcher.downloadBytes(rootUrl, this.config.rootMaxLength);
|
|
// Client workflow 5.3.4 - 5.4.7
|
|
this.trustedSet.updateRoot(bytesData);
|
|
// Client workflow 5.3.8: persist root metadata file
|
|
this.persistMetadata(models_1.MetadataKind.Root, bytesData);
|
|
}
|
|
catch (error) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Load local and remote timestamp metadata.
|
|
// Client workflow 5.4: update timestamp role
|
|
async loadTimestamp() {
|
|
// Load local and remote timestamp metadata
|
|
try {
|
|
const data = this.loadLocalMetadata(models_1.MetadataKind.Timestamp);
|
|
this.trustedSet.updateTimestamp(data);
|
|
}
|
|
catch (error) {
|
|
// continue
|
|
}
|
|
//Load from remote (whether local load succeeded or not)
|
|
const timestampUrl = url.join(this.metadataBaseUrl, 'timestamp.json');
|
|
// Client workflow 5.4.1: download timestamp metadata file
|
|
const bytesData = await this.fetcher.downloadBytes(timestampUrl, this.config.timestampMaxLength);
|
|
try {
|
|
// Client workflow 5.4.2 - 5.4.4
|
|
this.trustedSet.updateTimestamp(bytesData);
|
|
}
|
|
catch (error) {
|
|
// If new timestamp version is same as current, discardd the new one.
|
|
// This is normal and should NOT raise an error.
|
|
if (error instanceof error_1.EqualVersionError) {
|
|
return;
|
|
}
|
|
// Re-raise any other error
|
|
throw error;
|
|
}
|
|
// Client workflow 5.4.5: persist timestamp metadata
|
|
this.persistMetadata(models_1.MetadataKind.Timestamp, bytesData);
|
|
}
|
|
// Load local and remote snapshot metadata.
|
|
// Client workflow 5.5: update snapshot role
|
|
async loadSnapshot() {
|
|
//Load local (and if needed remote) snapshot metadata
|
|
try {
|
|
const data = this.loadLocalMetadata(models_1.MetadataKind.Snapshot);
|
|
this.trustedSet.updateSnapshot(data, true);
|
|
}
|
|
catch (error) {
|
|
if (!this.trustedSet.timestamp) {
|
|
throw new ReferenceError('No timestamp metadata');
|
|
}
|
|
const snapshotMeta = this.trustedSet.timestamp.signed.snapshotMeta;
|
|
const maxLength = snapshotMeta.length || this.config.snapshotMaxLength;
|
|
const version = this.trustedSet.root.signed.consistentSnapshot
|
|
? snapshotMeta.version
|
|
: undefined;
|
|
const snapshotUrl = url.join(this.metadataBaseUrl, version ? `${version}.snapshot.json` : 'snapshot.json');
|
|
try {
|
|
// Client workflow 5.5.1: download snapshot metadata file
|
|
const bytesData = await this.fetcher.downloadBytes(snapshotUrl, maxLength);
|
|
// Client workflow 5.5.2 - 5.5.6
|
|
this.trustedSet.updateSnapshot(bytesData);
|
|
// Client workflow 5.5.7: persist snapshot metadata file
|
|
this.persistMetadata(models_1.MetadataKind.Snapshot, bytesData);
|
|
}
|
|
catch (error) {
|
|
throw new error_1.RuntimeError(`Unable to load snapshot metadata error ${error}`);
|
|
}
|
|
}
|
|
}
|
|
// Load local and remote targets metadata.
|
|
// Client workflow 5.6: update targets role
|
|
async loadTargets(role, parentRole) {
|
|
if (this.trustedSet.getRole(role)) {
|
|
return this.trustedSet.getRole(role);
|
|
}
|
|
try {
|
|
const buffer = this.loadLocalMetadata(role);
|
|
this.trustedSet.updateDelegatedTargets(buffer, role, parentRole);
|
|
}
|
|
catch (error) {
|
|
// Local 'role' does not exist or is invalid: update from remote
|
|
if (!this.trustedSet.snapshot) {
|
|
throw new ReferenceError('No snapshot metadata');
|
|
}
|
|
const metaInfo = this.trustedSet.snapshot.signed.meta[`${role}.json`];
|
|
// TODO: use length for fetching
|
|
const maxLength = metaInfo.length || this.config.targetsMaxLength;
|
|
const version = this.trustedSet.root.signed.consistentSnapshot
|
|
? metaInfo.version
|
|
: undefined;
|
|
const metadataUrl = url.join(this.metadataBaseUrl, version ? `${version}.${role}.json` : `${role}.json`);
|
|
try {
|
|
// Client workflow 5.6.1: download targets metadata file
|
|
const bytesData = await this.fetcher.downloadBytes(metadataUrl, maxLength);
|
|
// Client workflow 5.6.2 - 5.6.6
|
|
this.trustedSet.updateDelegatedTargets(bytesData, role, parentRole);
|
|
// Client workflow 5.6.7: persist targets metadata file
|
|
this.persistMetadata(role, bytesData);
|
|
}
|
|
catch (error) {
|
|
throw new error_1.RuntimeError(`Unable to load targets error ${error}`);
|
|
}
|
|
}
|
|
return this.trustedSet.getRole(role);
|
|
}
|
|
async preorderDepthFirstWalk(targetPath) {
|
|
// Interrogates the tree of target delegations in order of appearance
|
|
// (which implicitly order trustworthiness), and returns the matching
|
|
// target found in the most trusted role.
|
|
// List of delegations to be interrogated. A (role, parent role) pair
|
|
// is needed to load and verify the delegated targets metadata.
|
|
const delegationsToVisit = [
|
|
{
|
|
roleName: models_1.MetadataKind.Targets,
|
|
parentRoleName: models_1.MetadataKind.Root,
|
|
},
|
|
];
|
|
const visitedRoleNames = new Set();
|
|
// Client workflow 5.6.7: preorder depth-first traversal of the graph of
|
|
// target delegations
|
|
while (visitedRoleNames.size <= this.config.maxDelegations &&
|
|
delegationsToVisit.length > 0) {
|
|
// Pop the role name from the top of the stack.
|
|
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
|
|
const { roleName, parentRoleName } = delegationsToVisit.pop();
|
|
// Skip any visited current role to prevent cycles.
|
|
// Client workflow 5.6.7.1: skip already-visited roles
|
|
if (visitedRoleNames.has(roleName)) {
|
|
continue;
|
|
}
|
|
// The metadata for 'role_name' must be downloaded/updated before
|
|
// its targets, delegations, and child roles can be inspected.
|
|
const targets = (await this.loadTargets(roleName, parentRoleName))
|
|
?.signed;
|
|
if (!targets) {
|
|
continue;
|
|
}
|
|
const target = targets.targets?.[targetPath];
|
|
if (target) {
|
|
return target;
|
|
}
|
|
// After preorder check, add current role to set of visited roles.
|
|
visitedRoleNames.add(roleName);
|
|
if (targets.delegations) {
|
|
const childRolesToVisit = [];
|
|
// NOTE: This may be a slow operation if there are many delegated roles.
|
|
const rolesForTarget = targets.delegations.rolesForTarget(targetPath);
|
|
for (const { role: childName, terminating } of rolesForTarget) {
|
|
childRolesToVisit.push({
|
|
roleName: childName,
|
|
parentRoleName: roleName,
|
|
});
|
|
// Client workflow 5.6.7.2.1
|
|
if (terminating) {
|
|
delegationsToVisit.splice(0); // empty the array
|
|
break;
|
|
}
|
|
}
|
|
childRolesToVisit.reverse();
|
|
delegationsToVisit.push(...childRolesToVisit);
|
|
}
|
|
}
|
|
return; // no matching target found
|
|
}
|
|
generateTargetPath(targetInfo) {
|
|
if (!this.targetDir) {
|
|
throw new error_1.ValueError('Target directory not set');
|
|
}
|
|
// URL encode target path
|
|
const filePath = encodeURIComponent(targetInfo.path);
|
|
return path.join(this.targetDir, filePath);
|
|
}
|
|
async persistMetadata(metaDataName, bytesData) {
|
|
try {
|
|
const filePath = path.join(this.dir, `${metaDataName}.json`);
|
|
log('WRITE %s', filePath);
|
|
fs.writeFileSync(filePath, bytesData.toString('utf8'));
|
|
}
|
|
catch (error) {
|
|
throw new error_1.PersistError(`Failed to persist metadata ${metaDataName} error: ${error}`);
|
|
}
|
|
}
|
|
}
|
|
exports.Updater = Updater;
|