diff --git a/package.json b/package.json index 9e22569a..956e027b 100644 --- a/package.json +++ b/package.json @@ -47,7 +47,11 @@ "xxhashjs": "^0.2.2" }, "dependencies": { + "aes-js": "^3.1.2", "another-json": "^0.2.0", - "olm": "https://packages.matrix.org/npm/olm/olm-3.1.4.tgz" + "base64-arraybuffer": "^0.2.0", + "bs58": "^4.0.1", + "olm": "https://packages.matrix.org/npm/olm/olm-3.1.4.tgz", + "text-encoding": "^0.7.0" } } diff --git a/prototypes/derive-key-ie11.html b/prototypes/derive-key-ie11.html new file mode 100644 index 00000000..6e48e788 --- /dev/null +++ b/prototypes/derive-key-ie11.html @@ -0,0 +1,165 @@ + + + + + + + + + + + + + + + + + + diff --git a/prototypes/derive-keys.js b/prototypes/derive-keys.js new file mode 100644 index 00000000..ce2b9cb0 --- /dev/null +++ b/prototypes/derive-keys.js @@ -0,0 +1,458 @@ +import {base58} from "../src/utils/base-encoding.js"; + +function subtleCryptoResult(promiseOrOp, method) { + if (promiseOrOp instanceof Promise) { + return promiseOrOp; + } else { + return new Promise((resolve, reject) => { + promiseOrOp.oncomplete = e => resolve(e.target.result); + promiseOrOp.onerror = e => reject(new Error("Crypto error on " + method)); + }); + } +} + +class CryptoHMACDriver { + constructor(subtleCrypto) { + this._subtleCrypto = subtleCrypto; + } + /** + * [hmac description] + * @param {BufferSource} key + * @param {BufferSource} mac + * @param {BufferSource} data + * @param {HashName} hash + * @return {boolean} + */ + async verify(key, mac, data, hash) { + const opts = { + name: 'HMAC', + hash: {name: hashName(hash)}, + }; + const hmacKey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + opts, + false, + ['verify'], + ), "importKey"); + const isVerified = await subtleCryptoResult(this._subtleCrypto.verify( + opts, + hmacKey, + mac, + data, + ), "verify"); + return isVerified; + } + + async compute(key, data, hash) { + const opts = { + name: 'HMAC', + hash: {name: hashName(hash)}, + }; + const hmacKey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + opts, + false, + ['sign'], + ), "importKey"); + const buffer = await subtleCryptoResult(this._subtleCrypto.sign( + opts, + hmacKey, + data, + ), "sign"); + return new Uint8Array(buffer); + } +} + +const nwbo = (num, len) => { + const arr = new Uint8Array(len); + for(let i=0; i> ((len - i - 1)*8)); + return arr; +}; + +class CryptoLegacyHMACDriver { + constructor(hmacDriver) { + this._hmacDriver = hmacDriver; + } + + async verify(key, mac, data, hash) { + if (hash === "SHA-512") { + throw new Error("SHA-512 HMAC verification is not implemented yet"); + } else { + return this._hmacDriver.verify(key, mac, data, hash) + } + } + + async compute(key, data, hash) { + if (hash === "SHA-256") { + return await this._hmacDriver.compute(key, data, hash); + } else { + const shaObj = new window.jsSHA(hash, "UINT8ARRAY", { + "hmacKey": { + "value": key, + "format": "UINT8ARRAY" + } + }); + shaObj.update(data); + return shaObj.getHash("UINT8ARRAY"); + } + } +} + +class CryptoLegacyDeriveDriver { + constructor(cryptoDriver) { + this._cryptoDriver = cryptoDriver; + } + + // adapted from https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-pbkdf/src/pbkdf.ts#L21 + // could also consider https://github.com/brix/crypto-js/blob/develop/src/pbkdf2.js although not async + async pbkdf2(password, iterations, salt, hash, length) { + const dkLen = length / 8; + if (iterations <= 0) { + throw new Error('InvalidIterationCount'); + } + if (dkLen <= 0) { + throw new Error('InvalidDerivedKeyLength'); + } + const hLen = this._cryptoDriver.digestSize(hash); + if(dkLen > (Math.pow(2, 32) - 1) * hLen) throw new Error('DerivedKeyTooLong'); + + const l = Math.ceil(dkLen/hLen); + const r = dkLen - (l-1)*hLen; + + const funcF = async (i) => { + const seed = new Uint8Array(salt.length + 4); + seed.set(salt); + seed.set(nwbo(i+1, 4), salt.length); + let u = await this._cryptoDriver.hmac.compute(password, seed, hash); + let outputF = new Uint8Array(u); + for(let j = 1; j < iterations; j++){ + if ((j % 1000) === 0) { + console.log(j, j/iterations); + } + u = await this._cryptoDriver.hmac.compute(password, u, hash); + outputF = u.map( (elem, idx) => elem ^ outputF[idx]); + } + return {index: i, value: outputF}; + }; + + const Tis = []; + const DK = new Uint8Array(dkLen); + for(let i = 0; i < l; i++) { + Tis.push(funcF(i)); + } + const TisResolved = await Promise.all(Tis); + TisResolved.forEach(elem => { + if (elem.index !== l - 1) { + DK.set(elem.value, elem.index*hLen); + } + else { + DK.set(elem.value.slice(0, r), elem.index*hLen); + } + }); + + return DK; + } + + // based on https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-hkdf/src/hkdf.ts + async hkdf(key, salt, info, hash, length) { + length = length / 8; + const len = this._cryptoDriver.digestSize(hash); + + // RFC5869 Step 1 (Extract) + const prk = await this._cryptoDriver.hmac.compute(salt, key, hash); + + // RFC5869 Step 2 (Expand) + let t = new Uint8Array([]); + const okm = new Uint8Array(Math.ceil(length / len) * len); + for(let i = 0; i < Math.ceil(length / len); i++){ + const concat = new Uint8Array(t.length + info.length + 1); + concat.set(t); + concat.set(info, t.length); + concat.set(new Uint8Array([i+1]), t.length + info.length); + t = await this._cryptoDriver.hmac.compute(prk, concat, hash); + okm.set(t, len * i); + } + return okm.slice(0, length); + } +} + +class CryptoDeriveDriver { + constructor(subtleCrypto) { + this._subtleCrypto = subtleCrypto; + } + /** + * [pbkdf2 description] + * @param {BufferSource} password + * @param {Number} iterations + * @param {BufferSource} salt + * @param {HashName} hash + * @param {Number} length the desired length of the generated key, in bits (not bytes!) + * @return {BufferSource} + */ + async pbkdf2(password, iterations, salt, hash, length) { + // check for existance of deriveBits, which IE11 does not have + const key = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + password, + {name: 'PBKDF2'}, + false, + ['deriveBits'], + ), "importKey"); + const keybits = await subtleCryptoResult(this._subtleCrypto.deriveBits( + { + name: 'PBKDF2', + salt, + iterations, + hash: hashName(hash), + }, + key, + length, + ), "deriveBits"); + return new Uint8Array(keybits); + } + + /** + * [hkdf description] + * @param {BufferSource} key [description] + * @param {BufferSource} salt [description] + * @param {BufferSource} info [description] + * @param {HashName} hash the hash to use + * @param {Number} length desired length of the generated key in bits (not bytes!) + * @return {[type]} [description] + */ + async hkdf(key, salt, info, hash, length) { + const hkdfkey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + {name: "HKDF"}, + false, + ["deriveBits"], + ), "importKey"); + const keybits = await subtleCryptoResult(this._subtleCrypto.deriveBits({ + name: "HKDF", + salt, + info, + hash: hashName(hash), + }, + hkdfkey, + length, + ), "deriveBits"); + return new Uint8Array(keybits); + } +} + +class CryptoAESDriver { + constructor(subtleCrypto) { + this._subtleCrypto = subtleCrypto; + } + /** + * [decrypt description] + * @param {BufferSource} key [description] + * @param {BufferSource} iv [description] + * @param {BufferSource} ciphertext [description] + * @return {BufferSource} [description] + */ + async decrypt(key, iv, ciphertext) { + const opts = { + name: "AES-CTR", + counter: iv, + length: 64, + }; + let aesKey; + try { + aesKey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + opts, + false, + ['decrypt'], + ), "importKey"); + } catch (err) { + throw new Error(`Could not import key for AES-CTR decryption: ${err.message}`); + } + try { + const plaintext = await subtleCryptoResult(this._subtleCrypto.decrypt( + // see https://developer.mozilla.org/en-US/docs/Web/API/AesCtrParams + opts, + aesKey, + ciphertext, + ), "decrypt"); + return new Uint8Array(plaintext); + } catch (err) { + throw new Error(`Could not decrypt with AES-CTR: ${err.message}`); + } + } +} + + +class CryptoLegacyAESDriver { + /** + * [decrypt description] + * @param {BufferSource} key [description] + * @param {BufferSource} iv [description] + * @param {BufferSource} ciphertext [description] + * @return {BufferSource} [description] + */ + async decrypt(key, iv, ciphertext) { + const aesjs = window.aesjs; + var aesCtr = new aesjs.ModeOfOperation.ctr(key, new aesjs.Counter(iv)); + return aesCtr.decrypt(ciphertext); + } +} + +function hashName(name) { + if (name !== "SHA-256" && name !== "SHA-512") { + throw new Error(`Invalid hash name: ${name}`); + } + return name; +} + +export class CryptoDriver { + constructor(subtleCrypto) { + this.aes = new CryptoLegacyAESDriver(); + // this.aes = new CryptoAESDriver(subtleCrypto); + //this.derive = new CryptoDeriveDriver(subtleCrypto); + this.derive = new CryptoLegacyDeriveDriver(this); + // subtleCrypto.deriveBits ? + // new CryptoDeriveDriver(subtleCrypto) : + // new CryptoLegacyDeriveDriver(this); + this.hmac = new CryptoLegacyHMACDriver(new CryptoHMACDriver(subtleCrypto)); + this._subtleCrypto = subtleCrypto; + } + + /** + * [digest description] + * @param {HashName} hash + * @param {BufferSource} data + * @return {BufferSource} + */ + async digest(hash, data) { + return await subtleCryptoResult(this._subtleCrypto.digest(hashName(hash), data)); + } + + digestSize(hash) { + switch (hashName(hash)) { + case "SHA-512": return 64; + case "SHA-256": return 32; + default: throw new Error(`Not implemented for ${hashName(hash)}`); + } + } +} + +export function decodeBase64(base64) { + const binStr = window.atob(base64); + const len = binStr.length; + const bytes = new Uint8Array(len); + for (let i = 0; i < len; i++) { + bytes[i] = binStr.charCodeAt(i); + } + return bytes; +} + +const DEFAULT_ITERATIONS = 500000; + +const DEFAULT_BITSIZE = 256; + +export async function deriveSSSSKey(cryptoDriver, passphrase, ssssKey) { + const textEncoder = new TextEncoder(); + return await cryptoDriver.derive.pbkdf2( + textEncoder.encode(passphrase), + ssssKey.content.passphrase.iterations || DEFAULT_ITERATIONS, + textEncoder.encode(ssssKey.content.passphrase.salt), + "SHA-512", + ssssKey.content.passphrase.bits || DEFAULT_BITSIZE); +} + +export async function decryptSecret(cryptoDriver, keyId, ssssKey, event) { + const textEncoder = new TextEncoder(); + const textDecoder = new TextDecoder(); + // now derive the aes and mac key from the 4s key + const hkdfKey = await cryptoDriver.derive.hkdf( + ssssKey, + new Uint8Array(8).buffer, //salt + textEncoder.encode(event.type), // info + "SHA-256", + 512 // 512 bits or 64 bytes + ); + const aesKey = hkdfKey.slice(0, 32); + const hmacKey = hkdfKey.slice(32); + + const data = event.content.encrypted[keyId]; + + const ciphertextBytes = decodeBase64(data.ciphertext); + const isVerified = await cryptoDriver.hmac.verify( + hmacKey, decodeBase64(data.mac), + ciphertextBytes, "SHA-256"); + + if (!isVerified) { + throw new Error("Bad MAC"); + } + + const plaintext = await cryptoDriver.aes.decrypt(aesKey, decodeBase64(data.iv), ciphertextBytes); + return textDecoder.decode(new Uint8Array(plaintext)); +} + + +export async function decryptSession(backupKeyBase64, backupInfo, sessionResponse) { + const privKey = decodeBase64(backupKeyBase64); + console.log("privKey", privKey); + + const decryption = new window.Olm.PkDecryption(); + let backupPubKey; + try { + backupPubKey = decryption.init_with_private_key(privKey); + } catch (e) { + decryption.free(); + throw e; + } + + // If the pubkey computed from the private data we've been given + // doesn't match the one in the auth_data, the user has enetered + // a different recovery key / the wrong passphrase. + if (backupPubKey !== backupInfo.auth_data.public_key) { + console.log("backupPubKey", backupPubKey.length, backupPubKey); + throw new Error("bad backup key"); + } + + const sessionInfo = decryption.decrypt( + sessionResponse.session_data.ephemeral, + sessionResponse.session_data.mac, + sessionResponse.session_data.ciphertext, + ); + return JSON.parse(sessionInfo); +} + +const OLM_RECOVERY_KEY_PREFIX = [0x8B, 0x01]; + + +export async function deserializeSSSSKey(recoverykey) { + const result = base58.decode(recoverykey.replace(/ /g, '')); + + let parity = 0; + for (const b of result) { + parity ^= b; + } + if (parity !== 0) { + throw new Error("Incorrect parity"); + } + + for (let i = 0; i < OLM_RECOVERY_KEY_PREFIX.length; ++i) { + if (result[i] !== OLM_RECOVERY_KEY_PREFIX[i]) { + throw new Error("Incorrect prefix"); + } + } + + if ( + result.length !== + OLM_RECOVERY_KEY_PREFIX.length + window.Olm.PRIVATE_KEY_LENGTH + 1 + ) { + throw new Error("Incorrect length"); + } + + return Uint8Array.from(result.slice( + OLM_RECOVERY_KEY_PREFIX.length, + OLM_RECOVERY_KEY_PREFIX.length + window.Olm.PRIVATE_KEY_LENGTH, + )); +} diff --git a/prototypes/ie11-hmac.html b/prototypes/ie11-hmac.html new file mode 100644 index 00000000..893e8328 --- /dev/null +++ b/prototypes/ie11-hmac.html @@ -0,0 +1,91 @@ + + + + + + + + + + + + + diff --git a/prototypes/pkcrypto-ie11.html b/prototypes/pkcrypto-ie11.html new file mode 100644 index 00000000..8f2853c4 --- /dev/null +++ b/prototypes/pkcrypto-ie11.html @@ -0,0 +1,62 @@ + + + + + + + + + + + + + + + diff --git a/prototypes/tools/package.json b/prototypes/tools/package.json new file mode 100644 index 00000000..d7487cac --- /dev/null +++ b/prototypes/tools/package.json @@ -0,0 +1,23 @@ +{ + "name": "foo", + "version": "1.0.0", + "description": "", + "main": "index.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "author": "", + "license": "ISC", + "devDependencies": { + "@babel/core": "^7.11.1", + "@babel/preset-env": "^7.11.0", + "@rollup/plugin-babel": "^5.1.0", + "@rollup/plugin-commonjs": "^15.0.0", + "@rollup/plugin-multi-entry": "^4.0.0", + "@rollup/plugin-node-resolve": "^9.0.0", + "mdn-polyfills": "^5.20.0", + "regenerator-runtime": "^0.13.7", + "rollup": "^2.26.4", + "core-js": "^3.6.5" + } +} diff --git a/prototypes/tools/transpile-ie11.mjs b/prototypes/tools/transpile-ie11.mjs new file mode 100644 index 00000000..1b0670b2 --- /dev/null +++ b/prototypes/tools/transpile-ie11.mjs @@ -0,0 +1,46 @@ +import fsRoot from "fs"; +const fs = fsRoot.promises; +import { rollup } from 'rollup'; +// needed for legacy bundle +import babel from '@rollup/plugin-babel'; +// needed to find the polyfill modules in the main-legacy.js bundle +import { nodeResolve } from '@rollup/plugin-node-resolve'; +// needed because some of the polyfills are written as commonjs modules +import commonjs from '@rollup/plugin-commonjs'; +// multi-entry plugin so we can add polyfill file to main +import multi from '@rollup/plugin-multi-entry'; +import removeJsComments from 'rollup-plugin-cleanup'; +// replace urls of asset names with content hashed version + +async function build(inputFile, outputFile) { + // compile down to whatever IE 11 needs + const babelPlugin = babel.babel({ + babelHelpers: 'bundled', + exclude: '../../node_modules/**', + presets: [ + [ + "@babel/preset-env", + { + useBuiltIns: "entry", + corejs: "3", + targets: "IE 11" + } + ] + ] + }); + const polyfillFile = '../../src/worker-polyfill.js'; + // create js bundle + const rollupConfig = { + input: [polyfillFile, inputFile], + plugins: [multi(), commonjs(), nodeResolve(), babelPlugin, removeJsComments({comments: "none"})] + }; + const bundle = await rollup(rollupConfig); + const {output} = await bundle.generate({ + format: 'iife', + name: `bundle` + }); + const code = output[0].code; + await fs.writeFile(outputFile, code, "utf8"); +} + +build(process.argv[2], process.argv[3]); diff --git a/prototypes/tools/yarn.lock b/prototypes/tools/yarn.lock new file mode 100644 index 00000000..666bce0a --- /dev/null +++ b/prototypes/tools/yarn.lock @@ -0,0 +1,1485 @@ +# THIS IS AN AUTOGENERATED FILE. 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await buildWorkerJsLegacy("src/worker.js", `worker.js`); const cssBundlePaths = await buildCssBundles(legacy ? buildCssLegacy : buildCss, themes, themeAssets); @@ -185,7 +185,7 @@ async function buildHtml(doc, version, assetPaths, manifestPath) { doc("script#main").replaceWith( `` + `` + - ``); + ``); removeOrEnableScript(doc("script#service-worker"), offline); const versionScript = doc("script#version"); @@ -218,7 +218,7 @@ async function buildJs(inputFile, outputName) { return bundlePath; } -async function buildJsLegacy(inputFile, outputName, polyfillFile = null) { +async function buildJsLegacy(inputFile, outputName, extraFile, polyfillFile) { // compile down to whatever IE 11 needs const babelPlugin = babel.babel({ babelHelpers: 'bundled', @@ -237,10 +237,14 @@ async function buildJsLegacy(inputFile, outputName, polyfillFile = null) { if (!polyfillFile) { polyfillFile = 'src/legacy-polyfill.js'; } + const inputFiles = [polyfillFile, inputFile]; + if (extraFile) { + inputFiles.push(extraFile); + } // create js bundle const rollupConfig = { - input: [polyfillFile, inputFile], - plugins: [multi(), commonjs(), nodeResolve(), babelPlugin, removeJsComments({comments: "none"})] + input: inputFiles, + plugins: [multi(), commonjs(), nodeResolve(), babelPlugin] }; const bundle = await rollup(rollupConfig); const {output} = await bundle.generate({ @@ -255,7 +259,7 @@ async function buildJsLegacy(inputFile, outputName, polyfillFile = null) { function buildWorkerJsLegacy(inputFile, outputName) { const polyfillFile = 'src/worker-polyfill.js'; - return buildJsLegacy(inputFile, outputName, polyfillFile); + return buildJsLegacy(inputFile, outputName, null, polyfillFile); } async function buildOffline(version, assetPaths) { diff --git a/scripts/package-overrides/buffer/index.js b/scripts/package-overrides/buffer/index.js new file mode 100644 index 00000000..0ed6d01c --- /dev/null +++ b/scripts/package-overrides/buffer/index.js @@ -0,0 +1,6 @@ +module.exports = class Buffer { + static isBuffer(array) {return array instanceof Uint8Array;} + static from(arrayBuffer) {return arrayBuffer;} + static allocUnsafe(size) {return Buffer.alloc(size);} + static alloc(size) {return new Uint8Array(size);} +}; diff --git a/scripts/package-overrides/safe-buffer/index.js b/scripts/package-overrides/safe-buffer/index.js new file mode 100644 index 00000000..93a10446 --- /dev/null +++ b/scripts/package-overrides/safe-buffer/index.js @@ -0,0 +1 @@ +module.exports.Buffer = require("buffer"); diff --git a/scripts/post-install.mjs b/scripts/post-install.mjs index 328f8c7c..41d233c7 100644 --- a/scripts/post-install.mjs +++ b/scripts/post-install.mjs @@ -22,18 +22,34 @@ import { fileURLToPath } from 'url'; import { dirname } from 'path'; // needed to translate commonjs modules to esm import commonjs from '@rollup/plugin-commonjs'; -// multi-entry plugin so we can add polyfill file to main +import { nodeResolve } from '@rollup/plugin-node-resolve'; import {removeDirIfExists} from "./common.mjs"; const __filename = fileURLToPath(import.meta.url); const __dirname = dirname(__filename); const projectDir = path.join(__dirname, "../"); +/** function used to resolve common-js require calls below. */ +function packageIterator(request, start, defaultIterator) { + // this is just working for bs58, would need to tune it further for other dependencies + if (request === "safe-buffer") { + return [path.join(projectDir, "/scripts/package-overrides/safe-buffer")]; + } else if (request === "buffer/") { + return [path.join(projectDir, "/scripts/package-overrides/buffer")]; + } else { + return defaultIterator(); + } +} + async function commonjsToESM(src, dst) { // create js bundle const bundle = await rollup({ input: src, - plugins: [commonjs()] + plugins: [commonjs(), nodeResolve({ + browser: true, + preferBuiltins: false, + customResolveOptions: {packageIterator} + })] }); const {output} = await bundle.generate({ format: 'es' @@ -59,6 +75,27 @@ async function populateLib() { path.join(modulesDir, 'another-json/another-json.js'), path.join(libDir, "another-json/index.js") ); + // transpile bs58 to esm + await fs.mkdir(path.join(libDir, "bs58/")); + await commonjsToESM( + path.join(modulesDir, 'bs58/index.js'), + path.join(libDir, "bs58/index.js") + ); + // transpile base64-arraybuffer to esm + await fs.mkdir(path.join(libDir, "base64-arraybuffer/")); + await commonjsToESM( + path.join(modulesDir, 'base64-arraybuffer/lib/base64-arraybuffer.js'), + path.join(libDir, "base64-arraybuffer/index.js") + ); + // this probably should no go in here, we can just import "aes-js" from legacy-extras.js + // as that file is never loaded from a browser + + // transpile aesjs to esm + await fs.mkdir(path.join(libDir, "aes-js/")); + await commonjsToESM( + path.join(modulesDir, 'aes-js/index.js'), + path.join(libDir, "aes-js/index.js") + ); } populateLib(); diff --git a/src/domain/SessionLoadViewModel.js b/src/domain/SessionLoadViewModel.js index 0511d8a7..e9454a24 100644 --- a/src/domain/SessionLoadViewModel.js +++ b/src/domain/SessionLoadViewModel.js @@ -80,7 +80,7 @@ export class SessionLoadViewModel extends ViewModel { async cancel() { try { if (this._sessionContainer) { - this._sessionContainer.stop(); + this._sessionContainer.dispose(); if (this._deleteSessionOnCancel) { await this._sessionContainer.deleteSession(); } diff --git a/src/domain/session/SessionStatusViewModel.js b/src/domain/session/SessionStatusViewModel.js index 54fad4a1..d6ce464c 100644 --- a/src/domain/session/SessionStatusViewModel.js +++ b/src/domain/session/SessionStatusViewModel.js @@ -31,21 +31,24 @@ const SessionStatus = createEnum( export class SessionStatusViewModel extends ViewModel { constructor(options) { super(options); - const {sync, reconnector} = options; + const {sync, reconnector, session} = options; this._sync = sync; this._reconnector = reconnector; this._status = this._calculateState(reconnector.connectionStatus.get(), sync.status.get()); - + this._session = session; } start() { const update = () => this._updateStatus(); this.track(this._sync.status.subscribe(update)); this.track(this._reconnector.connectionStatus.subscribe(update)); + this.track(this._session.needsSessionBackup.subscribe(() => { + this.emitChange(); + })); } get isShown() { - return this._status !== SessionStatus.Syncing; + return this._session.needsSessionBackup.get() || this._status !== SessionStatus.Syncing; } get statusLabel() { @@ -61,6 +64,9 @@ export class SessionStatusViewModel extends ViewModel { case SessionStatus.SyncError: return this.i18n`Sync failed because of ${this._sync.error}`; } + if (this._session.needsSessionBackup.get()) { + return this.i18n`Set up secret storage to decrypt older messages.`; + } return ""; } @@ -122,9 +128,25 @@ export class SessionStatusViewModel extends ViewModel { return this._status === SessionStatus.Disconnected; } + get isSecretStorageShown() { + // TODO: we need a model here where we can have multiple messages queued up and their buttons don't bleed into each other. + return this._status === SessionStatus.Syncing && this._session.needsSessionBackup.get(); + } + connectNow() { if (this.isConnectNowShown) { this._reconnector.tryNow(); } } + + async enterPassphrase(passphrase) { + if (passphrase) { + try { + await this._session.enableSecretStorage("recoverykey", passphrase); + } catch (err) { + console.error(err); + alert(`Could not set up secret storage: ${err.message}`); + } + } + } } diff --git a/src/domain/session/SessionViewModel.js b/src/domain/session/SessionViewModel.js index 152b77ac..0a77d2a0 100644 --- a/src/domain/session/SessionViewModel.js +++ b/src/domain/session/SessionViewModel.js @@ -26,7 +26,8 @@ export class SessionViewModel extends ViewModel { this._session = sessionContainer.session; this._sessionStatusViewModel = this.track(new SessionStatusViewModel(this.childOptions({ sync: sessionContainer.sync, - reconnector: sessionContainer.reconnector + reconnector: sessionContainer.reconnector, + session: sessionContainer.session, }))); this._currentRoomTileViewModel = null; this._currentRoomViewModel = null; diff --git a/src/domain/session/room/timeline/TilesCollection.js b/src/domain/session/room/timeline/TilesCollection.js index c2d9df5d..cf46899a 100644 --- a/src/domain/session/room/timeline/TilesCollection.js +++ b/src/domain/session/room/timeline/TilesCollection.js @@ -145,7 +145,12 @@ export class TilesCollection extends BaseObservableList { if (tile) { const action = tile.updateEntry(entry, params); if (action.shouldReplace) { - this._replaceTile(tileIdx, tile, this._tileCreator(entry)); + const newTile = this._tileCreator(entry); + if (newTile) { + this._replaceTile(tileIdx, tile, newTile); + } else { + this._removeTile(tileIdx, tile); + } } if (action.shouldRemove) { this._removeTile(tileIdx, tile); diff --git a/src/legacy-extras.js b/src/legacy-extras.js new file mode 100644 index 00000000..e6b1f08e --- /dev/null +++ b/src/legacy-extras.js @@ -0,0 +1,6 @@ +import aesjs from "../lib/aes-js/index.js"; +import {hkdf} from "./utils/crypto/hkdf.js"; + +// these are run-time dependencies that are only needed for the legacy bundle. +// they are exported here and passed into main to make them available to the app. +export const legacyExtras = {crypto:{aesjs, hkdf}}; diff --git a/src/legacy-polyfill.js b/src/legacy-polyfill.js index a48416c7..80be7a61 100644 --- a/src/legacy-polyfill.js +++ b/src/legacy-polyfill.js @@ -18,6 +18,13 @@ limitations under the License. import "core-js/stable"; import "regenerator-runtime/runtime"; import "mdn-polyfills/Element.prototype.closest"; +// olm.init needs utf-16le, and this polyfill was +// the only one I could find supporting it. +// TODO: because the library sees a commonjs environment, +// it will also include the file supporting *all* the encodings, +// weighing a good extra 500kb :-( +import "text-encoding"; + // TODO: contribute this to mdn-polyfills if (!Element.prototype.remove) { Element.prototype.remove = function remove() { diff --git a/src/main.js b/src/main.js index 97c0b812..5ad97cda 100644 --- a/src/main.js +++ b/src/main.js @@ -25,6 +25,7 @@ import {BrawlViewModel} from "./domain/BrawlViewModel.js"; import {BrawlView} from "./ui/web/BrawlView.js"; import {Clock} from "./ui/web/dom/Clock.js"; import {OnlineStatus} from "./ui/web/dom/OnlineStatus.js"; +import {CryptoDriver} from "./ui/web/dom/CryptoDriver.js"; import {WorkerPool} from "./utils/WorkerPool.js"; import {OlmWorker} from "./matrix/e2ee/OlmWorker.js"; @@ -78,8 +79,9 @@ async function loadOlmWorker(paths) { // Don't use a default export here, as we use multiple entries during legacy build, // which does not support default exports, // see https://github.com/rollup/plugins/tree/master/packages/multi-entry -export async function main(container, paths) { +export async function main(container, paths, legacyExtras) { try { + // TODO: add .legacy to body in (legacy)platform.createAndMountRootView; and use body:not(.legacy) if needed for modern stuff const isIE11 = !!window.MSInputMethodContext && !!document.documentMode; if (isIE11) { document.body.className += " ie11"; @@ -122,6 +124,7 @@ export async function main(container, paths) { sessionInfoStorage, request, clock, + cryptoDriver: new CryptoDriver(legacyExtras?.crypto), olmPromise, workerPromise, }); @@ -132,6 +135,7 @@ export async function main(container, paths) { }); window.__brawlViewModel = vm; await vm.load(); + // TODO: replace with platform.createAndMountRootView(vm, container); const view = new BrawlView(vm); container.appendChild(view.mount()); } catch(err) { diff --git a/src/matrix/Session.js b/src/matrix/Session.js index f8ac2f40..36a9b866 100644 --- a/src/matrix/Session.js +++ b/src/matrix/Session.js @@ -23,18 +23,26 @@ import {Account as E2EEAccount} from "./e2ee/Account.js"; import {Decryption as OlmDecryption} from "./e2ee/olm/Decryption.js"; import {Encryption as OlmEncryption} from "./e2ee/olm/Encryption.js"; import {Decryption as MegOlmDecryption} from "./e2ee/megolm/Decryption.js"; +import {SessionBackup} from "./e2ee/megolm/SessionBackup.js"; import {Encryption as MegOlmEncryption} from "./e2ee/megolm/Encryption.js"; import {MEGOLM_ALGORITHM} from "./e2ee/common.js"; import {RoomEncryption} from "./e2ee/RoomEncryption.js"; import {DeviceTracker} from "./e2ee/DeviceTracker.js"; import {LockMap} from "../utils/LockMap.js"; import {groupBy} from "../utils/groupBy.js"; +import { + keyFromCredential as ssssKeyFromCredential, + readKey as ssssReadKey, + writeKey as ssssWriteKey, +} from "./ssss/index.js"; +import {SecretStorage} from "./ssss/SecretStorage.js"; +import {ObservableValue} from "../observable/ObservableValue.js"; const PICKLE_KEY = "DEFAULT_KEY"; export class Session { // sessionInfo contains deviceId, userId and homeServer - constructor({clock, storage, hsApi, sessionInfo, olm, olmWorker}) { + constructor({clock, storage, hsApi, sessionInfo, olm, olmWorker, cryptoDriver}) { this._clock = clock; this._storage = storage; this._hsApi = hsApi; @@ -54,6 +62,7 @@ export class Session { this._megolmDecryption = null; this._getSyncToken = () => this.syncToken; this._olmWorker = olmWorker; + this._cryptoDriver = cryptoDriver; if (olm) { this._olmUtil = new olm.Utility(); @@ -66,6 +75,7 @@ export class Session { }); } this._createRoomEncryption = this._createRoomEncryption.bind(this); + this.needsSessionBackup = new ObservableValue(false); } // called once this._e2eeAccount is assigned @@ -130,10 +140,62 @@ export class Session { megolmEncryption: this._megolmEncryption, megolmDecryption: this._megolmDecryption, storage: this._storage, - encryptionParams + sessionBackup: this._sessionBackup, + encryptionParams, + notifyMissingMegolmSession: () => { + if (!this._sessionBackup) { + this.needsSessionBackup.set(true) + } + }, + clock: this._clock }); } + /** + * Enable secret storage by providing the secret storage credential. + * This will also see if there is a megolm session backup and try to enable that if so. + * + * @param {string} type either "passphrase" or "recoverykey" + * @param {string} credential either the passphrase or the recovery key, depending on the type + * @return {Promise} resolves or rejects after having tried to enable secret storage + */ + async enableSecretStorage(type, credential) { + if (!this._olm) { + throw new Error("olm required"); + } + const key = await ssssKeyFromCredential(type, credential, this._storage, this._cryptoDriver, this._olm); + // and create session backup, which needs to read from accountData + const readTxn = await this._storage.readTxn([ + this._storage.storeNames.accountData, + ]); + await this._createSessionBackup(key, readTxn); + // only after having read a secret, write the key + // as we only find out if it was good if the MAC verification succeeds + const writeTxn = await this._storage.readWriteTxn([ + this._storage.storeNames.session, + ]); + try { + ssssWriteKey(key, writeTxn); + } catch (err) { + writeTxn.abort(); + throw err; + } + await writeTxn.complete(); + } + + async _createSessionBackup(ssssKey, txn) { + const secretStorage = new SecretStorage({key: ssssKey, cryptoDriver: this._cryptoDriver}); + this._sessionBackup = await SessionBackup.fromSecretStorage({olm: this._olm, secretStorage, hsApi: this._hsApi, txn}); + if (this._sessionBackup) { + for (const room of this._rooms.values()) { + if (room.isEncrypted) { + room.enableSessionBackup(this._sessionBackup); + } + } + } + this.needsSessionBackup.set(false); + } + // called after load async beforeFirstSync(isNewLogin) { if (this._olm) { @@ -155,6 +217,17 @@ export class Session { await this._e2eeAccount.generateOTKsIfNeeded(this._storage); await this._e2eeAccount.uploadKeys(this._storage); await this._deviceMessageHandler.decryptPending(this.rooms); + + const txn = await this._storage.readTxn([ + this._storage.storeNames.session, + this._storage.storeNames.accountData, + ]); + // try set up session backup if we stored the ssss key + const ssssKey = await ssssReadKey(txn); + if (ssssKey) { + // txn will end here as this does a network request + await this._createSessionBackup(ssssKey, txn); + } } } @@ -197,9 +270,13 @@ export class Session { return this._sendScheduler.isStarted; } - stop() { + dispose() { this._olmWorker?.dispose(); this._sendScheduler.stop(); + this._sessionBackup?.dispose(); + for (const room of this._rooms.values()) { + room.dispose(); + } } async start(lastVersionResponse) { @@ -289,6 +366,16 @@ export class Session { if (Array.isArray(toDeviceEvents)) { this._deviceMessageHandler.writeSync(toDeviceEvents, txn); } + + // store account data + const accountData = syncResponse["account_data"]; + if (Array.isArray(accountData?.events)) { + for (const event of accountData.events) { + if (typeof event.type === "string") { + txn.accountData.set(event); + } + } + } return changes; } @@ -306,8 +393,6 @@ export class Session { const needsToUploadOTKs = await this._e2eeAccount.generateOTKsIfNeeded(this._storage); const promises = [this._deviceMessageHandler.decryptPending(this.rooms)]; if (needsToUploadOTKs) { - // TODO: we could do this in parallel with sync if it proves to be too slow - // but I'm not sure how to not swallow errors in that case promises.push(this._e2eeAccount.uploadKeys(this._storage)); } // run key upload and decryption in parallel diff --git a/src/matrix/SessionContainer.js b/src/matrix/SessionContainer.js index 98ffd2b1..0de70400 100644 --- a/src/matrix/SessionContainer.js +++ b/src/matrix/SessionContainer.js @@ -42,7 +42,7 @@ export const LoginFailure = createEnum( ); export class SessionContainer { - constructor({clock, random, onlineStatus, request, storageFactory, sessionInfoStorage, olmPromise, workerPromise}) { + constructor({clock, random, onlineStatus, request, storageFactory, sessionInfoStorage, olmPromise, workerPromise, cryptoDriver}) { this._random = random; this._clock = clock; this._onlineStatus = onlineStatus; @@ -60,6 +60,7 @@ export class SessionContainer { this._storage = null; this._olmPromise = olmPromise; this._workerPromise = workerPromise; + this._cryptoDriver = cryptoDriver; } createNewSessionId() { @@ -159,7 +160,7 @@ export class SessionContainer { } this._session = new Session({storage: this._storage, sessionInfo: filteredSessionInfo, hsApi, olm, - clock: this._clock, olmWorker}); + clock: this._clock, olmWorker, cryptoDriver: this._cryptoDriver}); await this._session.load(); this._status.set(LoadStatus.SessionSetup); await this._session.beforeFirstSync(isNewLogin); @@ -245,7 +246,7 @@ export class SessionContainer { return this._reconnector; } - stop() { + dispose() { if (this._reconnectSubscription) { this._reconnectSubscription(); this._reconnectSubscription = null; @@ -254,7 +255,7 @@ export class SessionContainer { this._sync.stop(); } if (this._session) { - this._session.stop(); + this._session.dispose(); } if (this._waitForFirstSyncHandle) { this._waitForFirstSyncHandle.dispose(); diff --git a/src/matrix/Sync.js b/src/matrix/Sync.js index ca76e57a..fe2a2bed 100644 --- a/src/matrix/Sync.js +++ b/src/matrix/Sync.js @@ -105,6 +105,8 @@ export class Sync { this._status.set(SyncStatus.Syncing); } catch (err) { if (!(err instanceof AbortError)) { + console.warn("stopping sync because of error"); + console.error(err); this._error = err; this._status.set(SyncStatus.Stopped); } @@ -168,8 +170,6 @@ export class Sync { })); sessionChanges = await this._session.writeSync(response, syncFilterId, syncTxn); } catch(err) { - console.warn("aborting syncTxn because of error"); - console.error(err); // avoid corrupting state by only // storing the sync up till the point // the exception occurred @@ -228,7 +228,8 @@ export class Sync { // to discard outbound session when somebody leaves a room // and to create room key messages when somebody leaves storeNames.outboundGroupSessions, - storeNames.operations + storeNames.operations, + storeNames.accountData, ]); } diff --git a/src/matrix/e2ee/RoomEncryption.js b/src/matrix/e2ee/RoomEncryption.js index b5b56ec2..87c64cbe 100644 --- a/src/matrix/e2ee/RoomEncryption.js +++ b/src/matrix/e2ee/RoomEncryption.js @@ -21,8 +21,17 @@ import {makeTxnId} from "../common.js"; const ENCRYPTED_TYPE = "m.room.encrypted"; +function encodeMissingSessionKey(senderKey, sessionId) { + return `${senderKey}|${sessionId}`; +} + +function decodeMissingSessionKey(key) { + const [senderKey, sessionId] = key.split("|"); + return {senderKey, sessionId}; +} + export class RoomEncryption { - constructor({room, deviceTracker, olmEncryption, megolmEncryption, megolmDecryption, encryptionParams, storage}) { + constructor({room, deviceTracker, olmEncryption, megolmEncryption, megolmDecryption, encryptionParams, storage, sessionBackup, notifyMissingMegolmSession, clock}) { this._room = room; this._deviceTracker = deviceTracker; this._olmEncryption = olmEncryption; @@ -37,6 +46,21 @@ export class RoomEncryption { this._eventIdsByMissingSession = new Map(); this._senderDeviceCache = new Map(); this._storage = storage; + this._sessionBackup = sessionBackup; + this._notifyMissingMegolmSession = notifyMissingMegolmSession; + this._clock = clock; + this._disposed = false; + } + + async enableSessionBackup(sessionBackup) { + if (this._sessionBackup) { + return; + } + this._sessionBackup = sessionBackup; + for(const key of this._eventIdsByMissingSession.keys()) { + const {senderKey, sessionId} = decodeMissingSessionKey(key); + await this._requestMissingSessionFromBackup(senderKey, sessionId, null); + } } notifyTimelineClosed() { @@ -81,7 +105,7 @@ export class RoomEncryption { } else if (source === DecryptionSource.Retry) { // when retrying, we could have mixed events from at the bottom of the timeline (sync) // and somewhere else, so create a custom cache we use just for this operation. - customCache = this._megolmEncryption.createSessionCache(); + customCache = this._megolmDecryption.createSessionCache(); sessionCache = customCache; } else { throw new Error("Unknown source: " + source); @@ -91,13 +115,13 @@ export class RoomEncryption { if (customCache) { customCache.dispose(); } - return new DecryptionPreparation(preparation, errors, {isTimelineOpen}, this); + return new DecryptionPreparation(preparation, errors, {isTimelineOpen, source}, this); } async _processDecryptionResults(results, errors, flags, txn) { for (const error of errors.values()) { if (error.code === "MEGOLM_NO_SESSION") { - this._addMissingSessionEvent(error.event); + this._addMissingSessionEvent(error.event, flags.source); } } if (flags.isTimelineOpen) { @@ -120,23 +144,78 @@ export class RoomEncryption { } } - _addMissingSessionEvent(event) { + _addMissingSessionEvent(event, source) { const senderKey = event.content?.["sender_key"]; const sessionId = event.content?.["session_id"]; - const key = `${senderKey}|${sessionId}`; + const key = encodeMissingSessionKey(senderKey, sessionId); let eventIds = this._eventIdsByMissingSession.get(key); + // new missing session if (!eventIds) { + this._requestMissingSessionFromBackup(senderKey, sessionId, source); eventIds = new Set(); this._eventIdsByMissingSession.set(key, eventIds); } eventIds.add(event.event_id); } + async _requestMissingSessionFromBackup(senderKey, sessionId, source) { + if (!this._sessionBackup) { + this._notifyMissingMegolmSession(); + return; + } + // if the message came from sync, wait 10s to see if the room key arrives, + // and only after that proceed to request from backup + if (source === DecryptionSource.Sync) { + await this._clock.createTimeout(10000).elapsed(); + if (this._disposed || !this._eventIdsByMissingSession.has(encodeMissingSessionKey(senderKey, sessionId))) { + return; + } + } + + try { + const session = await this._sessionBackup.getSession(this._room.id, sessionId); + if (session?.algorithm === MEGOLM_ALGORITHM) { + if (session["sender_key"] !== senderKey) { + console.warn("Got session key back from backup with different sender key, ignoring", {session, senderKey}); + return; + } + const txn = await this._storage.readWriteTxn([this._storage.storeNames.inboundGroupSessions]); + let roomKey; + try { + roomKey = await this._megolmDecryption.addRoomKeyFromBackup( + this._room.id, sessionId, session, txn); + } catch (err) { + txn.abort(); + throw err; + } + await txn.complete(); + + if (roomKey) { + // this will call into applyRoomKeys below + await this._room.notifyRoomKeys([roomKey]); + } + } else if (session?.algorithm) { + console.info(`Backed-up session of unknown algorithm: ${session.algorithm}`); + } + } catch (err) { + console.error(`Could not get session ${sessionId} from backup`, err); + } + } + + /** + * @type {RoomKeyDescription} + * @property {RoomKeyDescription} senderKey the curve25519 key of the sender + * @property {RoomKeyDescription} sessionId + * + * + * @param {Array} roomKeys + * @return {Array} the event ids that should be retried to decrypt + */ applyRoomKeys(roomKeys) { // retry decryption with the new sessions const retryEventIds = []; for (const roomKey of roomKeys) { - const key = `${roomKey.senderKey}|${roomKey.sessionId}`; + const key = encodeMissingSessionKey(roomKey.senderKey, roomKey.sessionId); const entriesForSession = this._eventIdsByMissingSession.get(key); if (entriesForSession) { this._eventIdsByMissingSession.delete(key); @@ -263,6 +342,10 @@ export class RoomEncryption { const txnId = makeTxnId(); await hsApi.sendToDevice(type, payload, txnId).response(); } + + dispose() { + this._disposed = true; + } } /** diff --git a/src/matrix/e2ee/common.js b/src/matrix/e2ee/common.js index 190f2fa2..52995765 100644 --- a/src/matrix/e2ee/common.js +++ b/src/matrix/e2ee/common.js @@ -17,7 +17,7 @@ limitations under the License. import anotherjson from "../../../lib/another-json/index.js"; import {createEnum} from "../../utils/enum.js"; -export const DecryptionSource = createEnum(["Sync", "Timeline", "Retry"]); +export const DecryptionSource = createEnum("Sync", "Timeline", "Retry"); // use common prefix so it's easy to clear properties that are not e2ee related during session clear export const SESSION_KEY_PREFIX = "e2ee:"; diff --git a/src/matrix/e2ee/megolm/Decryption.js b/src/matrix/e2ee/megolm/Decryption.js index 4d756dcb..09662e96 100644 --- a/src/matrix/e2ee/megolm/Decryption.js +++ b/src/matrix/e2ee/megolm/Decryption.js @@ -141,37 +141,76 @@ export class Decryption { const session = new this._olm.InboundGroupSession(); try { session.create(sessionKey); - - let incomingSessionIsBetter = true; - const existingSessionEntry = await txn.inboundGroupSessions.get(roomId, senderKey, sessionId); - if (existingSessionEntry) { - const existingSession = new this._olm.InboundGroupSession(); - try { - existingSession.unpickle(this._pickleKey, existingSessionEntry.session); - incomingSessionIsBetter = session.first_known_index() < existingSession.first_known_index(); - } finally { - existingSession.free(); - } - } - - if (incomingSessionIsBetter) { - const sessionEntry = { - roomId, - senderKey, - sessionId, - session: session.pickle(this._pickleKey), - claimedKeys: {ed25519: claimedEd25519Key}, - }; - txn.inboundGroupSessions.set(sessionEntry); + const sessionEntry = await this._writeInboundSession( + session, roomId, senderKey, claimedEd25519Key, sessionId, txn); + if (sessionEntry) { newSessions.push(sessionEntry); } } finally { session.free(); } - } // this will be passed to the Room in notifyRoomKeys return newSessions; } + + /* + sessionInfo is a response from key backup and has the following keys: + algorithm + forwarding_curve25519_key_chain + sender_claimed_keys + sender_key + session_key + */ + async addRoomKeyFromBackup(roomId, sessionId, sessionInfo, txn) { + const sessionKey = sessionInfo["session_key"]; + const senderKey = sessionInfo["sender_key"]; + // TODO: can we just trust this? + const claimedEd25519Key = sessionInfo["sender_claimed_keys"]?.["ed25519"]; + + if ( + typeof roomId !== "string" || + typeof sessionId !== "string" || + typeof senderKey !== "string" || + typeof sessionKey !== "string" || + typeof claimedEd25519Key !== "string" + ) { + return; + } + const session = new this._olm.InboundGroupSession(); + try { + session.import_session(sessionKey); + return await this._writeInboundSession( + session, roomId, senderKey, claimedEd25519Key, sessionId, txn); + } finally { + session.free(); + } + } + + async _writeInboundSession(session, roomId, senderKey, claimedEd25519Key, sessionId, txn) { + let incomingSessionIsBetter = true; + const existingSessionEntry = await txn.inboundGroupSessions.get(roomId, senderKey, sessionId); + if (existingSessionEntry) { + const existingSession = new this._olm.InboundGroupSession(); + try { + existingSession.unpickle(this._pickleKey, existingSessionEntry.session); + incomingSessionIsBetter = session.first_known_index() < existingSession.first_known_index(); + } finally { + existingSession.free(); + } + } + + if (incomingSessionIsBetter) { + const sessionEntry = { + roomId, + senderKey, + sessionId, + session: session.pickle(this._pickleKey), + claimedKeys: {ed25519: claimedEd25519Key}, + }; + txn.inboundGroupSessions.set(sessionEntry); + return sessionEntry; + } + } } diff --git a/src/matrix/e2ee/megolm/SessionBackup.js b/src/matrix/e2ee/megolm/SessionBackup.js new file mode 100644 index 00000000..e6614601 --- /dev/null +++ b/src/matrix/e2ee/megolm/SessionBackup.js @@ -0,0 +1,60 @@ +/* +Copyright 2020 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +import base64 from "../../../../lib/base64-arraybuffer/index.js"; + +export class SessionBackup { + constructor({backupInfo, decryption, hsApi}) { + this._backupInfo = backupInfo; + this._decryption = decryption; + this._hsApi = hsApi; + } + + async getSession(roomId, sessionId) { + const sessionResponse = await this._hsApi.roomKeyForRoomAndSession(this._backupInfo.version, roomId, sessionId).response(); + const sessionInfo = this._decryption.decrypt( + sessionResponse.session_data.ephemeral, + sessionResponse.session_data.mac, + sessionResponse.session_data.ciphertext, + ); + return JSON.parse(sessionInfo); + } + + dispose() { + this._decryption.free(); + } + + static async fromSecretStorage({olm, secretStorage, hsApi, txn}) { + const base64PrivateKey = await secretStorage.readSecret("m.megolm_backup.v1", txn); + if (base64PrivateKey) { + const privateKey = new Uint8Array(base64.decode(base64PrivateKey)); + const backupInfo = await hsApi.roomKeysVersion().response(); + const expectedPubKey = backupInfo.auth_data.public_key; + const decryption = new olm.PkDecryption(); + try { + const pubKey = decryption.init_with_private_key(privateKey); + if (pubKey !== expectedPubKey) { + throw new Error(`Bad backup key, public key does not match. Calculated ${pubKey} but expected ${expectedPubKey}`); + } + } catch(err) { + decryption.free(); + throw err; + } + return new SessionBackup({backupInfo, decryption, hsApi}); + } + } +} + diff --git a/src/matrix/net/HomeServerApi.js b/src/matrix/net/HomeServerApi.js index 649a7462..955e9548 100644 --- a/src/matrix/net/HomeServerApi.js +++ b/src/matrix/net/HomeServerApi.js @@ -73,13 +73,13 @@ export class HomeServerApi { return `${this._homeserver}/_matrix/client/r0${csPath}`; } - _request(method, url, queryParams, body, options) { + _baseRequest(method, url, queryParams, body, options, accessToken) { const queryString = encodeQueryParams(queryParams); url = `${url}?${queryString}`; let bodyString; const headers = new Map(); - if (this._accessToken) { - headers.set("Authorization", `Bearer ${this._accessToken}`); + if (accessToken) { + headers.set("Authorization", `Bearer ${accessToken}`); } headers.set("Accept", "application/json"); if (body) { @@ -106,16 +106,24 @@ export class HomeServerApi { return wrapper; } + _unauthedRequest(method, url, queryParams, body, options) { + return this._baseRequest(method, url, queryParams, body, options, null); + } + + _authedRequest(method, url, queryParams, body, options) { + return this._baseRequest(method, url, queryParams, body, options, this._accessToken); + } + _post(csPath, queryParams, body, options) { - return this._request("POST", this._url(csPath), queryParams, body, options); + return this._authedRequest("POST", this._url(csPath), queryParams, body, options); } _put(csPath, queryParams, body, options) { - return this._request("PUT", this._url(csPath), queryParams, body, options); + return this._authedRequest("PUT", this._url(csPath), queryParams, body, options); } _get(csPath, queryParams, body, options) { - return this._request("GET", this._url(csPath), queryParams, body, options); + return this._authedRequest("GET", this._url(csPath), queryParams, body, options); } sync(since, filter, timeout, options = null) { @@ -142,7 +150,7 @@ export class HomeServerApi { } passwordLogin(username, password, initialDeviceDisplayName, options = null) { - return this._post("/login", null, { + return this._unauthedRequest("POST", this._url("/login"), null, { "type": "m.login.password", "identifier": { "type": "m.id.user", @@ -158,7 +166,7 @@ export class HomeServerApi { } versions(options = null) { - return this._request("GET", `${this._homeserver}/_matrix/client/versions`, null, null, options); + return this._unauthedRequest("GET", `${this._homeserver}/_matrix/client/versions`, null, null, options); } uploadKeys(payload, options = null) { @@ -176,6 +184,18 @@ export class HomeServerApi { sendToDevice(type, payload, txnId, options = null) { return this._put(`/sendToDevice/${encodeURIComponent(type)}/${encodeURIComponent(txnId)}`, null, payload, options); } + + roomKeysVersion(version = null, options = null) { + let versionPart = ""; + if (version) { + versionPart = `/${encodeURIComponent(version)}`; + } + return this._get(`/room_keys/version${versionPart}`, null, null, options); + } + + roomKeyForRoomAndSession(version, roomId, sessionId, options = null) { + return this._get(`/room_keys/keys/${encodeURIComponent(roomId)}/${encodeURIComponent(sessionId)}`, {version}, null, options); + } get mediaRepository() { return this._mediaRepository; diff --git a/src/matrix/room/Room.js b/src/matrix/room/Room.js index 5976242d..db61aa14 100644 --- a/src/matrix/room/Room.js +++ b/src/matrix/room/Room.js @@ -429,6 +429,10 @@ export class Room extends EventEmitter { return !!this._summary.encryption; } + enableSessionBackup(sessionBackup) { + this._roomEncryption?.enableSessionBackup(sessionBackup); + } + get isTrackingMembers() { return this._summary.isTrackingMembers; } @@ -525,6 +529,11 @@ export class Room extends EventEmitter { applyIsTrackingMembersChanges(changes) { this._summary.applyChanges(changes); } + + dispose() { + this._roomEncryption?.dispose(); + this._timeline?.dispose(); + } } class DecryptionRequest { diff --git a/src/matrix/room/RoomSummary.js b/src/matrix/room/RoomSummary.js index 741b8764..21739a1e 100644 --- a/src/matrix/room/RoomSummary.js +++ b/src/matrix/room/RoomSummary.js @@ -326,7 +326,7 @@ export class RoomSummary { * writeIsTrackingMembers, ... take a txn directly. */ async writeAndApplyChanges(data, storage) { - const txn = await storage.readTxn([ + const txn = await storage.readWriteTxn([ storage.storeNames.roomSummary, ]); try { diff --git a/src/matrix/ssss/SecretStorage.js b/src/matrix/ssss/SecretStorage.js new file mode 100644 index 00000000..a94c2e19 --- /dev/null +++ b/src/matrix/ssss/SecretStorage.js @@ -0,0 +1,72 @@ +/* +Copyright 2020 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +import base64 from "../../../lib/base64-arraybuffer/index.js"; + +export class SecretStorage { + constructor({key, cryptoDriver}) { + this._key = key; + this._cryptoDriver = cryptoDriver; + } + + async readSecret(name, txn) { + const accountData = await txn.accountData.get(name); + if (!accountData) { + return; + } + const encryptedData = accountData?.content?.encrypted?.[this._key.id]; + if (!encryptedData) { + throw new Error(`Secret ${accountData.type} is not encrypted for key ${this._key.id}`); + } + + if (this._key.algorithm === "m.secret_storage.v1.aes-hmac-sha2") { + return await this._decryptAESSecret(accountData.type, encryptedData); + } else { + throw new Error(`Unsupported algorithm for key ${this._key.id}: ${this._key.algorithm}`); + } + } + + async _decryptAESSecret(type, encryptedData) { + // TODO: we should we move this to platform specific code + const textEncoder = new TextEncoder(); + const textDecoder = new TextDecoder(); + // now derive the aes and mac key from the 4s key + const hkdfKey = await this._cryptoDriver.derive.hkdf( + this._key.binaryKey, + new Uint8Array(8).buffer, //zero salt + textEncoder.encode(type), // info + "SHA-256", + 512 // 512 bits or 64 bytes + ); + const aesKey = hkdfKey.slice(0, 32); + const hmacKey = hkdfKey.slice(32); + + const ciphertextBytes = base64.decode(encryptedData.ciphertext); + + const isVerified = await this._cryptoDriver.hmac.verify( + hmacKey, base64.decode(encryptedData.mac), + ciphertextBytes, "SHA-256"); + + if (!isVerified) { + throw new Error("Bad MAC"); + } + + const plaintextBytes = await this._cryptoDriver.aes.decrypt( + aesKey, base64.decode(encryptedData.iv), ciphertextBytes); + + return textDecoder.decode(plaintextBytes); + } +} diff --git a/src/matrix/ssss/common.js b/src/matrix/ssss/common.js new file mode 100644 index 00000000..38a14790 --- /dev/null +++ b/src/matrix/ssss/common.js @@ -0,0 +1,53 @@ +/* +Copyright 2020 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +export class KeyDescription { + constructor(id, keyAccountData) { + this._id = id; + this._keyAccountData = keyAccountData; + } + + get id() { + return this._id; + } + + get passphraseParams() { + return this._keyAccountData?.content?.passphrase; + } + + get algorithm() { + return this._keyAccountData?.content?.algorithm; + } +} + +export class Key { + constructor(keyDescription, binaryKey) { + this._keyDescription = keyDescription; + this._binaryKey = binaryKey; + } + + get id() { + return this._keyDescription.id; + } + + get binaryKey() { + return this._binaryKey; + } + + get algorithm() { + return this._keyDescription.algorithm; + } +} diff --git a/src/matrix/ssss/index.js b/src/matrix/ssss/index.js new file mode 100644 index 00000000..286744fc --- /dev/null +++ b/src/matrix/ssss/index.js @@ -0,0 +1,64 @@ +/* +Copyright 2020 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +import {KeyDescription, Key} from "./common.js"; +import {keyFromPassphrase} from "./passphrase.js"; +import {keyFromRecoveryKey} from "./recoveryKey.js"; + +async function readDefaultKeyDescription(storage) { + const txn = await storage.readTxn([ + storage.storeNames.accountData + ]); + const defaultKeyEvent = await txn.accountData.get("m.secret_storage.default_key"); + const id = defaultKeyEvent?.content?.key; + if (!id) { + return; + } + const keyAccountData = await txn.accountData.get(`m.secret_storage.key.${id}`); + if (!keyAccountData) { + return; + } + return new KeyDescription(id, keyAccountData); +} + +export async function writeKey(key, txn) { + txn.session.set("ssssKey", {id: key.id, binaryKey: key.binaryKey}); +} + +export async function readKey(txn) { + const keyData = await txn.session.get("ssssKey"); + if (!keyData) { + return; + } + const keyAccountData = await txn.accountData.get(`m.secret_storage.key.${keyData.id}`); + return new Key(new KeyDescription(keyData.id, keyAccountData), keyData.binaryKey); +} + +export async function keyFromCredential(type, credential, storage, cryptoDriver, olm) { + const keyDescription = await readDefaultKeyDescription(storage); + if (!keyDescription) { + throw new Error("Could not find a default secret storage key in account data"); + } + let key; + if (type === "passphrase") { + key = await keyFromPassphrase(keyDescription, credential, cryptoDriver); + } else if (type === "recoverykey") { + key = keyFromRecoveryKey(olm, keyDescription, credential); + } else { + throw new Error(`Invalid type: ${type}`); + } + return key; +} diff --git a/src/matrix/ssss/passphrase.js b/src/matrix/ssss/passphrase.js new file mode 100644 index 00000000..1e3935a4 --- /dev/null +++ b/src/matrix/ssss/passphrase.js @@ -0,0 +1,46 @@ +/* +Copyright 2020 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +import {Key} from "./common.js"; + +const DEFAULT_ITERATIONS = 500000; +const DEFAULT_BITSIZE = 256; + +/** + * @param {KeyDescription} keyDescription + * @param {string} passphrase + * @param {CryptoDriver} cryptoDriver + * @return {Key} + */ +export async function keyFromPassphrase(keyDescription, passphrase, cryptoDriver) { + const {passphraseParams} = keyDescription; + if (!passphraseParams) { + throw new Error("not a passphrase key"); + } + if (passphraseParams.algorithm !== "m.pbkdf2") { + throw new Error(`Unsupported passphrase algorithm: ${passphraseParams.algorithm}`); + } + // TODO: we should we move this to platform specific code + const textEncoder = new TextEncoder(); + const keyBits = await cryptoDriver.derive.pbkdf2( + textEncoder.encode(passphrase), + passphraseParams.iterations || DEFAULT_ITERATIONS, + // salt is just a random string, not encoded in any way + textEncoder.encode(passphraseParams.salt), + "SHA-512", + passphraseParams.bits || DEFAULT_BITSIZE); + return new Key(keyDescription, keyBits); +} diff --git a/src/matrix/ssss/recoveryKey.js b/src/matrix/ssss/recoveryKey.js new file mode 100644 index 00000000..5d2b1d7a --- /dev/null +++ b/src/matrix/ssss/recoveryKey.js @@ -0,0 +1,57 @@ +/* +Copyright 2020 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ +import bs58 from "../../../lib/bs58/index.js"; +import {Key} from "./common.js"; + +const OLM_RECOVERY_KEY_PREFIX = [0x8B, 0x01]; + +/** + * @param {Olm} olm + * @param {KeyDescription} keyDescription + * @param {string} recoveryKey + * @return {Key} + */ +export function keyFromRecoveryKey(olm, keyDescription, recoveryKey) { + const result = bs58.decode(recoveryKey.replace(/ /g, '')); + + let parity = 0; + for (const b of result) { + parity ^= b; + } + if (parity !== 0) { + throw new Error("Incorrect parity"); + } + + for (let i = 0; i < OLM_RECOVERY_KEY_PREFIX.length; ++i) { + if (result[i] !== OLM_RECOVERY_KEY_PREFIX[i]) { + throw new Error("Incorrect prefix"); + } + } + + if ( + result.length !== + OLM_RECOVERY_KEY_PREFIX.length + olm.PRIVATE_KEY_LENGTH + 1 + ) { + throw new Error("Incorrect length"); + } + + const keyBits = Uint8Array.from(result.slice( + OLM_RECOVERY_KEY_PREFIX.length, + OLM_RECOVERY_KEY_PREFIX.length + olm.PRIVATE_KEY_LENGTH, + )); + + return new Key(keyDescription, keyBits); +} diff --git a/src/matrix/storage/common.js b/src/matrix/storage/common.js index f74dafdc..88238a11 100644 --- a/src/matrix/storage/common.js +++ b/src/matrix/storage/common.js @@ -28,7 +28,8 @@ export const STORE_NAMES = Object.freeze([ "inboundGroupSessions", "outboundGroupSessions", "groupSessionDecryptions", - "operations" + "operations", + "accountData", ]); export const STORE_MAP = Object.freeze(STORE_NAMES.reduce((nameMap, name) => { diff --git a/src/matrix/storage/idb/StorageFactory.js b/src/matrix/storage/idb/StorageFactory.js index 0b58d5dc..8f6e5d69 100644 --- a/src/matrix/storage/idb/StorageFactory.js +++ b/src/matrix/storage/idb/StorageFactory.js @@ -19,7 +19,7 @@ import { openDatabase, reqAsPromise } from "./utils.js"; import { exportSession, importSession } from "./export.js"; import { schema } from "./schema.js"; -const sessionName = sessionId => `brawl_session_${sessionId}`; +const sessionName = sessionId => `hydrogen_session_${sessionId}`; const openDatabaseWithSessionId = sessionId => openDatabase(sessionName(sessionId), createStores, schema.length); export class StorageFactory { diff --git a/src/matrix/storage/idb/Transaction.js b/src/matrix/storage/idb/Transaction.js index d28d802f..08eacb34 100644 --- a/src/matrix/storage/idb/Transaction.js +++ b/src/matrix/storage/idb/Transaction.js @@ -31,6 +31,7 @@ import {InboundGroupSessionStore} from "./stores/InboundGroupSessionStore.js"; import {OutboundGroupSessionStore} from "./stores/OutboundGroupSessionStore.js"; import {GroupSessionDecryptionStore} from "./stores/GroupSessionDecryptionStore.js"; import {OperationStore} from "./stores/OperationStore.js"; +import {AccountDataStore} from "./stores/AccountDataStore.js"; export class Transaction { constructor(txn, allowedStoreNames) { @@ -111,6 +112,10 @@ export class Transaction { return this._store("operations", idbStore => new OperationStore(idbStore)); } + get accountData() { + return this._store("accountData", idbStore => new AccountDataStore(idbStore)); + } + complete() { return txnAsPromise(this._txn); } diff --git a/src/matrix/storage/idb/schema.js b/src/matrix/storage/idb/schema.js index b78c117b..4d0d45ac 100644 --- a/src/matrix/storage/idb/schema.js +++ b/src/matrix/storage/idb/schema.js @@ -10,7 +10,8 @@ export const schema = [ createMemberStore, migrateSession, createE2EEStores, - migrateEncryptionFlag + migrateEncryptionFlag, + createAccountDataStore ]; // TODO: how to deal with git merge conflicts of this array? @@ -97,3 +98,8 @@ async function migrateEncryptionFlag(db, txn) { } } } + +// v6 +function createAccountDataStore(db) { + db.createObjectStore("accountData", {keyPath: "type"}); +} diff --git a/src/matrix/storage/idb/stores/AccountDataStore.js b/src/matrix/storage/idb/stores/AccountDataStore.js new file mode 100644 index 00000000..7f22a518 --- /dev/null +++ b/src/matrix/storage/idb/stores/AccountDataStore.js @@ -0,0 +1,29 @@ +/* +Copyright 2020 Bruno Windels + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +export class AccountDataStore { + constructor(store) { + this._store = store; + } + + async get(type) { + return await this._store.get(type); + } + + set(event) { + return this._store.put(event); + } +} diff --git a/src/ui/web/dom/CryptoDriver.js b/src/ui/web/dom/CryptoDriver.js new file mode 100644 index 00000000..66bb35c0 --- /dev/null +++ b/src/ui/web/dom/CryptoDriver.js @@ -0,0 +1,257 @@ +/* +Copyright 2020 The Matrix.org Foundation C.I.C. + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +// turn IE11 result into promise +function subtleCryptoResult(promiseOrOp, method) { + if (promiseOrOp instanceof Promise) { + return promiseOrOp; + } else { + return new Promise((resolve, reject) => { + promiseOrOp.oncomplete = e => resolve(e.target.result); + promiseOrOp.onerror = () => reject(new Error("Crypto error on " + method)); + }); + } +} + +class CryptoHMACDriver { + constructor(subtleCrypto) { + this._subtleCrypto = subtleCrypto; + } + /** + * [hmac description] + * @param {BufferSource} key + * @param {BufferSource} mac + * @param {BufferSource} data + * @param {HashName} hash + * @return {boolean} + */ + async verify(key, mac, data, hash) { + const opts = { + name: 'HMAC', + hash: {name: hashName(hash)}, + }; + const hmacKey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + opts, + false, + ['verify'], + ), "importKey"); + const isVerified = await subtleCryptoResult(this._subtleCrypto.verify( + opts, + hmacKey, + mac, + data, + ), "verify"); + return isVerified; + } + + async compute(key, data, hash) { + const opts = { + name: 'HMAC', + hash: {name: hashName(hash)}, + }; + const hmacKey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + opts, + false, + ['sign'], + ), "importKey"); + const buffer = await subtleCryptoResult(this._subtleCrypto.sign( + opts, + hmacKey, + data, + ), "sign"); + return new Uint8Array(buffer); + } +} + +class CryptoDeriveDriver { + constructor(subtleCrypto, cryptoDriver, cryptoExtras) { + this._subtleCrypto = subtleCrypto; + this._cryptoDriver = cryptoDriver; + this._cryptoExtras = cryptoExtras; + } + /** + * [pbkdf2 description] + * @param {BufferSource} password + * @param {Number} iterations + * @param {BufferSource} salt + * @param {HashName} hash + * @param {Number} length the desired length of the generated key, in bits (not bytes!) + * @return {BufferSource} + */ + async pbkdf2(password, iterations, salt, hash, length) { + if (!this._subtleCrypto.deriveBits) { + throw new Error("PBKDF2 is not supported"); + } + const key = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + password, + {name: 'PBKDF2'}, + false, + ['deriveBits'], + ), "importKey"); + const keybits = await subtleCryptoResult(this._subtleCrypto.deriveBits( + { + name: 'PBKDF2', + salt, + iterations, + hash: hashName(hash), + }, + key, + length, + ), "deriveBits"); + return new Uint8Array(keybits); + } + + /** + * [hkdf description] + * @param {BufferSource} key [description] + * @param {BufferSource} salt [description] + * @param {BufferSource} info [description] + * @param {HashName} hash the hash to use + * @param {Number} length desired length of the generated key in bits (not bytes!) + * @return {[type]} [description] + */ + async hkdf(key, salt, info, hash, length) { + if (!this._subtleCrypto.deriveBits) { + return this._cryptoExtras.hkdf(this._cryptoDriver, key, salt, info, hash, length); + } + const hkdfkey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + {name: "HKDF"}, + false, + ["deriveBits"], + ), "importKey"); + const keybits = await subtleCryptoResult(this._subtleCrypto.deriveBits({ + name: "HKDF", + salt, + info, + hash: hashName(hash), + }, + hkdfkey, + length, + ), "deriveBits"); + return new Uint8Array(keybits); + } +} + +class CryptoAESDriver { + constructor(subtleCrypto) { + this._subtleCrypto = subtleCrypto; + } + /** + * [decrypt description] + * @param {BufferSource} key [description] + * @param {BufferSource} iv [description] + * @param {BufferSource} ciphertext [description] + * @return {BufferSource} [description] + */ + async decrypt(key, iv, ciphertext) { + const opts = { + name: "AES-CTR", + counter: iv, + length: 64, + }; + let aesKey; + try { + aesKey = await subtleCryptoResult(this._subtleCrypto.importKey( + 'raw', + key, + opts, + false, + ['decrypt'], + ), "importKey"); + } catch (err) { + throw new Error(`Could not import key for AES-CTR decryption: ${err.message}`); + } + try { + const plaintext = await subtleCryptoResult(this._subtleCrypto.decrypt( + // see https://developer.mozilla.org/en-US/docs/Web/API/AesCtrParams + opts, + aesKey, + ciphertext, + ), "decrypt"); + return new Uint8Array(plaintext); + } catch (err) { + throw new Error(`Could not decrypt with AES-CTR: ${err.message}`); + } + } +} + + +class CryptoLegacyAESDriver { + constructor(aesjs) { + this._aesjs = aesjs; + } + /** + * [decrypt description] + * @param {BufferSource} key [description] + * @param {BufferSource} iv [description] + * @param {BufferSource} ciphertext [description] + * @return {BufferSource} [description] + */ + async decrypt(key, iv, ciphertext) { + const aesjs = this._aesjs; + var aesCtr = new aesjs.ModeOfOperation.ctr(new Uint8Array(key), new aesjs.Counter(new Uint8Array(iv))); + return aesCtr.decrypt(new Uint8Array(ciphertext)); + } +} + +function hashName(name) { + if (name !== "SHA-256" && name !== "SHA-512") { + throw new Error(`Invalid hash name: ${name}`); + } + return name; +} + +export class CryptoDriver { + constructor(cryptoExtras) { + const crypto = window.crypto || window.msCrypto; + const subtleCrypto = crypto.subtle || crypto.webkitSubtle; + this._subtleCrypto = subtleCrypto; + // not exactly guaranteeing AES-CTR support + // but in practice IE11 doesn't have this + if (!subtleCrypto.deriveBits && cryptoExtras.aesjs) { + this.aes = new CryptoLegacyAESDriver(cryptoExtras.aesjs); + } else { + this.aes = new CryptoAESDriver(subtleCrypto); + } + this.hmac = new CryptoHMACDriver(subtleCrypto); + this.derive = new CryptoDeriveDriver(subtleCrypto, this, cryptoExtras); + } + + /** + * [digest description] + * @param {HashName} hash + * @param {BufferSource} data + * @return {BufferSource} + */ + async digest(hash, data) { + return await subtleCryptoResult(this._subtleCrypto.digest(hashName(hash), data)); + } + + digestSize(hash) { + switch (hashName(hash)) { + case "SHA-512": return 64; + case "SHA-256": return 32; + default: throw new Error(`Not implemented for ${hashName(hash)}`); + } + } +} diff --git a/src/ui/web/session/SessionStatusView.js b/src/ui/web/session/SessionStatusView.js index 648ef232..0a4fea0e 100644 --- a/src/ui/web/session/SessionStatusView.js +++ b/src/ui/web/session/SessionStatusView.js @@ -26,6 +26,7 @@ export class SessionStatusView extends TemplateView { spinner(t, {hidden: vm => !vm.isWaiting}), t.p(vm => vm.statusLabel), t.if(vm => vm.isConnectNowShown, t.createTemplate(t => t.button({onClick: () => vm.connectNow()}, "Retry now"))), + t.if(vm => vm.isSecretStorageShown, t.createTemplate(t => t.button({onClick: () => vm.enterPassphrase(prompt("Security key"))}, "Enter security key"))), window.DEBUG ? t.button({id: "showlogs"}, "Show logs") : "" ]); } diff --git a/src/utils/crypto/hkdf.js b/src/utils/crypto/hkdf.js new file mode 100644 index 00000000..d46dc496 --- /dev/null +++ b/src/utils/crypto/hkdf.js @@ -0,0 +1,29 @@ +/** + * Copyright (c) 2018 Jun Kurihara + * Copyright 2020 The Matrix.org Foundation C.I.C. + * + * MIT LICENSE, See https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-hkdf/LICENSE + * Based on https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-hkdf/src/hkdf.ts + */ + +// forked this code to make it use the cryptoDriver for HMAC that is more backwards-compatible +export async function hkdf(cryptoDriver, key, salt, info, hash, length) { + length = length / 8; + const len = cryptoDriver.digestSize(hash); + + // RFC5869 Step 1 (Extract) + const prk = await cryptoDriver.hmac.compute(salt, key, hash); + + // RFC5869 Step 2 (Expand) + let t = new Uint8Array([]); + const okm = new Uint8Array(Math.ceil(length / len) * len); + for(let i = 0; i < Math.ceil(length / len); i++){ + const concat = new Uint8Array(t.length + info.length + 1); + concat.set(t); + concat.set(info, t.length); + concat.set(new Uint8Array([i+1]), t.length + info.length); + t = await cryptoDriver.hmac.compute(prk, concat, hash); + okm.set(t, len * i); + } + return okm.slice(0, length); +} diff --git a/src/utils/crypto/pbkdf2.js b/src/utils/crypto/pbkdf2.js new file mode 100644 index 00000000..5a239791 --- /dev/null +++ b/src/utils/crypto/pbkdf2.js @@ -0,0 +1,65 @@ +/** + * Copyright (c) 2018 Jun Kurihara + * Copyright 2020 The Matrix.org Foundation C.I.C. + * + * MIT LICENSE, See https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-pbkdf/LICENSE + * Based on https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-pbkdf/src/pbkdf.ts + */ + +// not used atm, but might in the future +// forked this code to make it use the cryptoDriver for HMAC that is more backwards-compatible + + +const nwbo = (num, len) => { + const arr = new Uint8Array(len); + for(let i=0; i> ((len - i - 1)*8)); + return arr; +}; + +export async function pbkdf2(cryptoDriver, password, iterations, salt, hash, length) { + const dkLen = length / 8; + if (iterations <= 0) { + throw new Error('InvalidIterationCount'); + } + if (dkLen <= 0) { + throw new Error('InvalidDerivedKeyLength'); + } + const hLen = cryptoDriver.digestSize(hash); + if(dkLen > (Math.pow(2, 32) - 1) * hLen) throw new Error('DerivedKeyTooLong'); + + const l = Math.ceil(dkLen/hLen); + const r = dkLen - (l-1)*hLen; + + const funcF = async (i) => { + const seed = new Uint8Array(salt.length + 4); + seed.set(salt); + seed.set(nwbo(i+1, 4), salt.length); + let u = await cryptoDriver.hmac.compute(password, seed, hash); + let outputF = new Uint8Array(u); + for(let j = 1; j < iterations; j++){ + if ((j % 1000) === 0) { + console.log(j, j/iterations); + } + u = await cryptoDriver.hmac.compute(password, u, hash); + outputF = u.map( (elem, idx) => elem ^ outputF[idx]); + } + return {index: i, value: outputF}; + }; + + const Tis = []; + const DK = new Uint8Array(dkLen); + for(let i = 0; i < l; i++) { + Tis.push(funcF(i)); + } + const TisResolved = await Promise.all(Tis); + TisResolved.forEach(elem => { + if (elem.index !== l - 1) { + DK.set(elem.value, elem.index*hLen); + } + else { + DK.set(elem.value.slice(0, r), elem.index*hLen); + } + }); + + return DK; +} diff --git a/src/utils/enum.js b/src/utils/enum.js index 733a548b..4defcfd7 100644 --- a/src/utils/enum.js +++ b/src/utils/enum.js @@ -17,6 +17,9 @@ limitations under the License. export function createEnum(...values) { const obj = {}; for (const value of values) { + if (typeof value !== "string") { + throw new Error("Invalid enum value name" + value?.toString()); + } obj[value] = value; } return Object.freeze(obj); diff --git a/src/worker-polyfill.js b/src/worker-polyfill.js index 15b955d5..7d9f9521 100644 --- a/src/worker-polyfill.js +++ b/src/worker-polyfill.js @@ -21,3 +21,30 @@ import "regenerator-runtime/runtime"; import "core-js/modules/es.promise"; import "core-js/modules/es.math.imul"; import "core-js/modules/es.math.clz32"; + +import "core-js/modules/es.typed-array.from"; +import "core-js/modules/es.typed-array.of"; +import "core-js/modules/es.typed-array.copy-within"; +import "core-js/modules/es.typed-array.every"; +import "core-js/modules/es.typed-array.fill"; +import "core-js/modules/es.typed-array.filter"; +import "core-js/modules/es.typed-array.find"; +import "core-js/modules/es.typed-array.find-index"; +import "core-js/modules/es.typed-array.for-each"; +import "core-js/modules/es.typed-array.includes"; +import "core-js/modules/es.typed-array.index-of"; +import "core-js/modules/es.typed-array.join"; +import "core-js/modules/es.typed-array.last-index-of"; +import "core-js/modules/es.typed-array.map"; +import "core-js/modules/es.typed-array.reduce"; +import "core-js/modules/es.typed-array.reduce-right"; +import "core-js/modules/es.typed-array.reverse"; +import "core-js/modules/es.typed-array.set"; +import "core-js/modules/es.typed-array.slice"; +import "core-js/modules/es.typed-array.some"; +import "core-js/modules/es.typed-array.sort"; +import "core-js/modules/es.typed-array.subarray"; +import "core-js/modules/es.typed-array.to-locale-string"; +import "core-js/modules/es.typed-array.to-string"; +import "core-js/modules/es.typed-array.iterator"; +import "core-js/modules/es.object.to-string"; diff --git a/yarn.lock b/yarn.lock index d1bf27a2..f1b9a4be 100644 --- a/yarn.lock +++ b/yarn.lock @@ -821,7 +821,16 @@ globals "^11.1.0" lodash "^4.17.19" -"@babel/types@^7.10.4", "@babel/types@^7.10.5", "@babel/types@^7.11.0", "@babel/types@^7.4.4": +"@babel/types@^7.10.4": + version "7.11.5" + resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.11.5.tgz#d9de577d01252d77c6800cee039ee64faf75662d" + integrity sha512-bvM7Qz6eKnJVFIn+1LPtjlBFPVN5jNDc1XmN15vWe7Q3DPBufWWsLiIvUu7xW87uTG6QoggpIDnUgLQvPheU+Q== + dependencies: + "@babel/helper-validator-identifier" "^7.10.4" + lodash "^4.17.19" + to-fast-properties "^2.0.0" + +"@babel/types@^7.10.5", "@babel/types@^7.11.0", "@babel/types@^7.4.4": version "7.11.0" resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.11.0.tgz#2ae6bf1ba9ae8c3c43824e5861269871b206e90d" integrity sha512-O53yME4ZZI0jO1EVGtF1ePGl0LHirG4P1ibcD80XyzZcKhcMFeCXmh4Xb1ifGBIV233Qg12x4rBfQgA+tmOukA== @@ -831,9 +840,9 @@ to-fast-properties "^2.0.0" "@rollup/plugin-babel@^5.1.0": - version "5.2.0" - resolved "https://registry.yarnpkg.com/@rollup/plugin-babel/-/plugin-babel-5.2.0.tgz#b87556d61ed108b4eaf9d18b5323965adf8d9bee" - integrity sha512-CPABsajaKjINgBQ3it+yMnfVO3ibsrMBxRzbUOUw2cL1hsZJ7aogU8mgglQm3S2hHJgjnAmxPz0Rq7DVdmHsTw== + version "5.2.1" + resolved "https://registry.yarnpkg.com/@rollup/plugin-babel/-/plugin-babel-5.2.1.tgz#20fc8f8864dc0eaa1c5578408459606808f72924" + integrity sha512-Jd7oqFR2dzZJ3NWANDyBjwTtX/lYbZpVcmkHrfQcpvawHs9E4c0nYk5U2mfZ6I/DZcIvy506KZJi54XK/jxH7A== dependencies: "@babel/helper-module-imports" "^7.10.4" "@rollup/pluginutils" "^3.1.0" @@ -886,9 +895,9 @@ picomatch "^2.2.2" "@types/estree@*": - version "0.0.42" - resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.42.tgz#8d0c1f480339efedb3e46070e22dd63e0430dd11" - integrity 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sha512-zdN0hor7TLkjAdKTnYW+Y22oIhUUpil5ZD1V1OFq0CR0CLKw+NdR6dkziTfkWRLo6sKzisayoj/GNpNbe4LY9Q== "@types/resolve@1.17.1": version "1.17.1" @@ -907,6 +916,11 @@ dependencies: "@types/node" "*" +aes-js@^3.1.2: + version "3.1.2" + resolved "https://registry.yarnpkg.com/aes-js/-/aes-js-3.1.2.tgz#db9aabde85d5caabbfc0d4f2a4446960f627146a" + integrity sha512-e5pEa2kBnBOgR4Y/p20pskXI74UEz7de8ZGVo58asOtvSVG5YAbJeELPZxOmt+Bnz3rX753YKhfIn4X4l1PPRQ== + another-json@^0.2.0: version "0.2.0" resolved "https://registry.yarnpkg.com/another-json/-/another-json-0.2.0.tgz#b5f4019c973b6dd5c6506a2d93469cb6d32aeedc" @@ -931,6 +945,18 @@ balanced-match@^1.0.0: resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767" integrity sha1-ibTRmasr7kneFk6gK4nORi1xt2c= +base-x@^3.0.2: + version "3.0.8" + resolved "https://registry.yarnpkg.com/base-x/-/base-x-3.0.8.tgz#1e1106c2537f0162e8b52474a557ebb09000018d" + integrity sha512-Rl/1AWP4J/zRrk54hhlxH4drNxPJXYUaKffODVI53/dAsV4t9fBxyxYKAVPU1XBHxYwOWP9h9H0hM2MVw4YfJA== + dependencies: + safe-buffer "^5.0.1" + +base64-arraybuffer@^0.2.0: + version "0.2.0" + resolved "https://registry.yarnpkg.com/base64-arraybuffer/-/base64-arraybuffer-0.2.0.tgz#4b944fac0191aa5907afe2d8c999ccc57ce80f45" + integrity sha512-7emyCsu1/xiBXgQZrscw/8KPRT44I4Yq9Pe6EGs3aPRTsWuggML1/1DTuZUuIaJPIm1FTDUVXl4x/yW8s0kQDQ== + boolbase@~1.0.0: version "1.0.0" resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e" @@ -954,6 +980,13 @@ browserslist@^4.12.0, browserslist@^4.8.5: escalade "^3.0.2" node-releases "^1.1.60" +bs58@^4.0.1: + version "4.0.1" + resolved "https://registry.yarnpkg.com/bs58/-/bs58-4.0.1.tgz#be161e76c354f6f788ae4071f63f34e8c4f0a42a" + integrity sha1-vhYedsNU9veIrkBx9j806MTwpCo= + dependencies: + base-x "^3.0.2" + builtin-modules@^3.1.0: version "3.1.0" resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-3.1.0.tgz#aad97c15131eb76b65b50ef208e7584cd76a7484" @@ -1720,12 +1753,17 @@ rollup-pluginutils@^2.3.3: estree-walker "^0.6.1" rollup@^2.26.4: - version "2.26.4" - resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.26.4.tgz#a8350fd6bd56fce9873a7db2bd9547d40de3992b" - integrity sha512-6+qsGuP0MXGd7vlYmk72utm1MrgZj5GfXibGL+cRkKQ9+ZL/BnFThDl0D5bcl7AqlzMjAQXRAwZX1HVm22M/4Q== + version "2.27.1" + resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.27.1.tgz#372744e1d36eba0fd942d997600c2fc2ca266305" + integrity sha512-GiWHQvnmMgBktSpY/1+nrGpwPsTw4b9P28og2uedfeq4JZ16rzAmnQ5Pm/E0/BEmDNia1ZbY7+qu3nBgNa19Hg== optionalDependencies: fsevents "~2.1.2" +safe-buffer@^5.0.1: + version "5.2.1" + resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6" + integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ== + safe-buffer@~5.1.1: version "5.1.2" resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d" @@ -1826,6 +1864,11 @@ supports-color@^6.1.0: dependencies: has-flag "^3.0.0" +text-encoding@^0.7.0: + version "0.7.0" + resolved "https://registry.yarnpkg.com/text-encoding/-/text-encoding-0.7.0.tgz#f895e836e45990624086601798ea98e8f36ee643" + integrity sha512-oJQ3f1hrOnbRLOcwKz0Liq2IcrvDeZRHXhd9RgLrsT+DjWY/nty1Hi7v3dtkaEYbPYe0mUoOfzRrMwfXXwgPUA== + to-fast-properties@^2.0.0: version "2.0.0" resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-2.0.0.tgz#dc5e698cbd079265bc73e0377681a4e4e83f616e"