Telegram Web K with changes to work inside I2P
https://web.telegram.i2p/
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551 lines
20 KiB
551 lines
20 KiB
import { TLSerialization, TLDeserialization } from "./tl_utils"; |
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import dcConfigurator from "./dcConfigurator"; |
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import rsaKeysManager from "./rsaKeysManager"; |
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import timeManager from "./timeManager"; |
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// @ts-ignore |
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import { BigInteger } from "jsbn"; |
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import CryptoWorker from "../crypto/cryptoworker"; |
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import { logger, LogLevels } from "../logger"; |
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import { bytesCmp, bytesToHex, bytesFromHex, bytesXor } from "../../helpers/bytes"; |
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//import { bigInt2str, greater, int2bigInt, one, powMod, str2bigInt, sub } from "../../vendor/leemon"; |
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/* let fNewNonce: any = bytesFromHex('8761970c24cb2329b5b2459752c502f3057cb7e8dbab200e526e8767fdc73b3c').reverse(); |
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let fNonce: any = bytesFromHex('b597720d11faa5914ef485c529cde414').reverse(); |
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let fResult: any = new Uint8Array(bytesFromHex('000000000000000001b473a0661b285e480000006324160514e4cd29c585f44e91a5fa110d7297b5c0c4134c84893db5715ecd56af5ed618082182053cc5de91cd00000015c4b51c02000000a5b7f709355fc30b216be86c022bb4c3')); |
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fNewNonce = false; |
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fNonce = false; |
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fResult = false; */ |
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type AuthOptions = { |
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dcId: number, |
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nonce: Uint8Array, |
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serverNonce?: Uint8Array, |
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pq?: Uint8Array, |
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fingerprints?: string[], |
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publicKey?: { |
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modulus: string, |
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exponent: string, |
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fingerprint: string |
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}, |
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// good |
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p?: number[], |
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q?: number[], |
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newNonce?: Uint8Array, |
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retry?: number, |
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b?: number[], |
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g?: number, |
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gA?: Uint8Array, |
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dhPrime?: Uint8Array, |
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tmpAesKey?: Uint8Array, |
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tmpAesIv?: Uint8Array, |
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authKeyId?: Uint8Array, |
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authKey?: number[], |
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serverSalt?: number[], |
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localTime?: number, |
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serverTime?: any |
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}; |
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export class Authorizer { |
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private cached: { |
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[dcId: number]: Promise<AuthOptions> |
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} = {}; |
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private log: ReturnType<typeof logger>; |
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constructor() { |
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this.log = logger(`AUTHORIZER`, LogLevels.error | LogLevels.log); |
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} |
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public mtpSendPlainRequest(dcId: number, requestArray: Uint8Array) { |
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var requestLength = requestArray.byteLength; |
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//requestArray = new /* Int32Array */Uint8Array(requestBuffer); |
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var header = new TLSerialization(); |
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header.storeLongP(0, 0, 'auth_key_id'); // Auth key |
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header.storeLong(timeManager.generateId(), 'msg_id'); // Msg_id |
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header.storeInt(requestLength, 'request_length'); |
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let headerArray = header.getBytes(true) as Uint8Array; |
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let resultArray = new Uint8Array(headerArray.byteLength + requestLength); |
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resultArray.set(headerArray); |
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resultArray.set(requestArray, headerArray.length); |
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/* var headerBuffer = header.getBuffer(), |
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headerArray = new Int32Array(headerBuffer); |
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var headerLength = headerBuffer.byteLength; |
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var resultBuffer = new ArrayBuffer(headerLength + requestLength), |
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resultArray = new Int32Array(resultBuffer); |
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resultArray.set(headerArray); |
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resultArray.set(requestArray, headerArray.length); |
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let requestData = xhrSendBuffer ? resultBuffer : resultArray; */ |
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let transport = dcConfigurator.chooseServer(dcId); |
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let baseError = { |
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code: 406, |
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type: 'NETWORK_BAD_RESPONSE', |
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transport: transport |
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}; |
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this.log('mtpSendPlainRequest: creating requestPromise'); |
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return transport.send(resultArray).then(result => { |
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this.log('mtpSendPlainRequest: in good sector', result); |
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if(!result || !result.byteLength) { |
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return Promise.reject(baseError); |
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} |
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try { |
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/* result = fResult ? fResult : result; |
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fResult = new Uint8Array(0); */ |
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let deserializer = new TLDeserialization(result, {mtproto: true}); |
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let auth_key_id = deserializer.fetchLong('auth_key_id'); |
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if(auth_key_id != 0) this.log.error('auth_key_id != 0', auth_key_id); |
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let msg_id = deserializer.fetchLong('msg_id'); |
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if(msg_id == 0) this.log.error('msg_id == 0', msg_id); |
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let msg_len = deserializer.fetchInt('msg_len'); |
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if(!msg_len) this.log.error('no msg_len', msg_len); |
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return deserializer; |
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} catch(e) { |
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this.log.error('mtpSendPlainRequest: deserialization went bad', e); |
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let error = Object.assign(baseError, {originalError: e}); |
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throw error; |
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} |
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}, error => { |
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if(!error.message && !error.type) { |
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error = Object.assign(baseError, { |
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originalError: error |
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}); |
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} |
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return Promise.reject(error); |
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}); |
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} |
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public async mtpSendReqPQ(auth: AuthOptions) { |
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var request = new TLSerialization({mtproto: true}); |
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request.storeMethod('req_pq_multi', {nonce: auth.nonce}); |
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// need |
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rsaKeysManager.prepare().then(() => {}); |
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this.log('Send req_pq', auth.nonce.hex); |
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try { |
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var deserializer = await this.mtpSendPlainRequest(auth.dcId, request.getBytes(true)); |
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} catch(error) { |
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this.log.error('req_pq error', error.message); |
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throw error; |
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} |
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var response = deserializer.fetchObject('ResPQ'); |
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if(response._ != 'resPQ') { |
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throw new Error('[MT] resPQ response invalid: ' + response._); |
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} |
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if(!bytesCmp(auth.nonce, response.nonce)) { |
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this.log.error(auth.nonce, response.nonce); |
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throw new Error('[MT] resPQ nonce mismatch'); |
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} |
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//auth.serverNonce = response.server_nonce; |
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auth.serverNonce = new Uint8Array(response.server_nonce); // need |
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auth.pq = response.pq; |
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auth.fingerprints = response.server_public_key_fingerprints; |
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this.log('Got ResPQ', bytesToHex(auth.serverNonce), bytesToHex(auth.pq), auth.fingerprints); |
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let publicKey = await rsaKeysManager.select(auth.fingerprints); |
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if(!publicKey) { |
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throw new Error('[MT] No public key found'); |
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} |
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auth.publicKey = publicKey; |
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this.log('PQ factorization start', auth.pq); |
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try { |
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var pAndQ = await CryptoWorker.factorize(auth.pq); |
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} catch(error) { |
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this.log.error('worker error factorize', error); |
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throw error; |
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} |
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auth.p = pAndQ[0]; |
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auth.q = pAndQ[1]; |
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this.log('PQ factorization done', pAndQ); |
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/* let p = new Uint32Array(new Uint8Array(auth.p).buffer)[0]; |
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let q = new Uint32Array(new Uint8Array(auth.q).buffer)[0]; |
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console.log(dT(), 'PQ factorization done', pAndQ, p.toString(16), q.toString(16)); */ |
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return this.mtpSendReqDhParams(auth); |
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} |
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public async mtpSendReqDhParams(auth: AuthOptions) { |
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auth.newNonce = new Uint8Array(32).randomize(); |
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/* auth.newNonce = new Array(32); // need array, not uint8array! |
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MTProto.secureRandom.nextBytes(auth.newNonce); */ |
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//console.log("TCL: Authorizer -> mtpSendReqDhParams -> auth.newNonce", auth.newNonce) |
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// remove |
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// auth.newNonce = fNewNonce ? fNewNonce : auth.newNonce; |
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// console.log("TCL: Authorizer -> mtpSendReqDhParams -> auth.newNonce", auth.newNonce); |
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let p_q_inner_data = { |
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_: 'p_q_inner_data', |
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pq: auth.pq, |
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p: auth.p, |
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q: auth.q, |
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nonce: auth.nonce, |
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server_nonce: auth.serverNonce, |
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new_nonce: auth.newNonce |
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}; |
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let data = new TLSerialization({mtproto: true}); |
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data.storeObject(p_q_inner_data, 'P_Q_inner_data', 'DECRYPTED_DATA'); |
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/* console.log('p_q_inner_data', p_q_inner_data, |
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bytesToHex(bytesFromArrayBuffer(data.getBuffer())), |
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sha1BytesSync(data.getBuffer()), |
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bytesFromArrayBuffer(await CryptoWorker.sha1Hash(data.getBuffer()))); */ |
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let uint8Data = data.getBytes(true); |
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let sha1Hashed = await CryptoWorker.sha1Hash(uint8Data); |
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//var dataWithHash = sha1BytesSync(data.getBuffer()).concat(data.getBytes() as number[]); |
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let dataWithHash = sha1Hashed.concat(uint8Data); |
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//dataWithHash = addPadding(dataWithHash, 255); |
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//dataWithHash = dataWithHash.concat(bytesFromHex('96228ea7790e71caaabc2ab67f4412e9aa224c664d232cc08617a32ce1796aa052da4a737083211689858f461e4473fd6394afd3aa0c8014840dc13f47beaf4fc3b9229aea9cfa83f9f6e676e50ee7676542fb75606879ee7e65cf3a2295b4ba0934ceec1011560c62395a6e9593bfb117cd0da75ba56723672d100ac17ec4d805aa59f7852e3a25a79ee4')); |
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//console.log('sha1Hashed', bytesToHex(sha1Hashed), 'dataWithHash', bytesToHex(dataWithHash), dataWithHash.length); |
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let rsaEncrypted = await CryptoWorker.rsaEncrypt(auth.publicKey, dataWithHash); |
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//let rsaEncrypted = await CryptoWorker.rsaEncrypt(auth.publicKey, dataWithHash); |
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//console.log('rsaEncrypted', rsaEncrypted, new Uint8Array(rsaEncrypted).hex); |
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let req_DH_params = { |
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nonce: auth.nonce, |
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server_nonce: auth.serverNonce, |
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p: auth.p, |
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q: auth.q, |
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public_key_fingerprint: auth.publicKey.fingerprint, |
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encrypted_data: rsaEncrypted |
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}; |
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var request = new TLSerialization({mtproto: true}); |
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request.storeMethod('req_DH_params', req_DH_params); |
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let requestBytes = request.getBytes(true); |
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this.log('Send req_DH_params', req_DH_params/* , requestBytes.hex */); |
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try { |
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var deserializer = await this.mtpSendPlainRequest(auth.dcId, requestBytes); |
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} catch(error) { |
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this.log('Send req_DH_params FAIL!', error); |
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throw error; |
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} |
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var response = deserializer.fetchObject('Server_DH_Params', 'RESPONSE'); |
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this.log('Sent req_DH_params, response:', response); |
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if(response._ != 'server_DH_params_fail' && response._ != 'server_DH_params_ok') { |
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throw new Error('[MT] Server_DH_Params response invalid: ' + response._); |
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} |
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if(!bytesCmp(auth.nonce, response.nonce)) { |
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throw new Error('[MT] Server_DH_Params nonce mismatch'); |
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} |
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if(!bytesCmp(auth.serverNonce, response.server_nonce)) { |
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throw new Error('[MT] Server_DH_Params server_nonce mismatch'); |
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} |
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if(response._ == 'server_DH_params_fail') { |
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//var newNonceHash = sha1BytesSync(auth.newNonce).slice(-16); |
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var newNonceHash = (await CryptoWorker.sha1Hash(auth.newNonce)).slice(-16); |
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if(!bytesCmp(newNonceHash, response.new_nonce_hash)) { |
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throw new Error('[MT] server_DH_params_fail new_nonce_hash mismatch'); |
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} |
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throw new Error('[MT] server_DH_params_fail'); |
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} |
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// fill auth object |
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try { |
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await this.mtpDecryptServerDhDataAnswer(auth, response.encrypted_answer); |
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} catch(e) { |
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this.log.error('mtpDecryptServerDhDataAnswer FAILED!', e); |
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throw e; |
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} |
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//console.log(dT(), 'mtpSendReqDhParams: executing mtpSendSetClientDhParams...'); |
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return this.mtpSendSetClientDhParams(auth as any); // костыль |
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} |
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public async mtpDecryptServerDhDataAnswer(auth: AuthOptions, encryptedAnswer: any) { |
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auth.localTime = Date.now(); |
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// can't concat Array with Uint8Array! |
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//auth.tmpAesKey = sha1BytesSync(auth.newNonce.concat(auth.serverNonce)).concat(sha1BytesSync(auth.serverNonce.concat(auth.newNonce)).slice(0, 12)); |
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//auth.tmpAesIv = sha1BytesSync(auth.serverNonce.concat(auth.newNonce)).slice(12).concat(sha1BytesSync([].concat(auth.newNonce, auth.newNonce)), auth.newNonce.slice(0, 4)); |
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auth.tmpAesKey = (await CryptoWorker.sha1Hash(auth.newNonce.concat(auth.serverNonce))) |
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.concat((await CryptoWorker.sha1Hash(auth.serverNonce.concat(auth.newNonce))).slice(0, 12)); |
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auth.tmpAesIv = (await CryptoWorker.sha1Hash(auth.serverNonce.concat(auth.newNonce))).slice(12) |
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.concat(await CryptoWorker.sha1Hash(auth.newNonce.concat(auth.newNonce)), auth.newNonce.slice(0, 4)); |
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/* console.log(auth.serverNonce.concat(auth.newNonce)); |
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console.log(auth.newNonce.concat(auth.serverNonce)); |
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console.log(auth.newNonce.concat(auth.newNonce)); */ |
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//var answerWithHash = aesDecryptSync(encryptedAnswer, auth.tmpAesKey, auth.tmpAesIv); |
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var answerWithHash = new Uint8Array(await CryptoWorker.aesDecrypt(encryptedAnswer, auth.tmpAesKey, auth.tmpAesIv)); |
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var hash = answerWithHash.slice(0, 20); |
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var answerWithPadding = answerWithHash.slice(20); |
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// console.log('hash', hash); |
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var deserializer = new TLDeserialization(answerWithPadding, {mtproto: true}); |
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var response = deserializer.fetchObject('Server_DH_inner_data'); |
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if(response._ != 'server_DH_inner_data') { |
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throw new Error('[MT] server_DH_inner_data response invalid: ' + response); |
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} |
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if(!bytesCmp(auth.nonce, response.nonce)) { |
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throw new Error('[MT] server_DH_inner_data nonce mismatch'); |
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} |
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if(!bytesCmp(auth.serverNonce, response.server_nonce)) { |
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throw new Error('[MT] server_DH_inner_data serverNonce mismatch'); |
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} |
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this.log('Done decrypting answer'); |
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auth.g = response.g; |
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auth.dhPrime = response.dh_prime; |
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auth.gA = response.g_a; |
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auth.serverTime = response.server_time; |
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auth.retry = 0; |
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this.mtpVerifyDhParams(auth.g, auth.dhPrime, auth.gA); |
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var offset = deserializer.getOffset(); |
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//if(!bytesCmp(hash, sha1BytesSync(answerWithPadding.slice(0, offset)))) { |
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if(!bytesCmp(hash, await CryptoWorker.sha1Hash(answerWithPadding.slice(0, offset)))) { |
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throw new Error('[MT] server_DH_inner_data SHA1-hash mismatch'); |
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} |
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timeManager.applyServerTime(auth.serverTime, auth.localTime); |
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} |
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public mtpVerifyDhParams(g: number, dhPrime: Uint8Array, gA: Uint8Array) { |
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this.log('Verifying DH params', g, dhPrime, gA); |
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var dhPrimeHex = bytesToHex(dhPrime); |
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if(g != 3 || dhPrimeHex !== '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') { |
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// The verified value is from https://core.telegram.org/mtproto/security_guidelines |
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throw new Error('[MT] DH params are not verified: unknown dhPrime'); |
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} |
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this.log('dhPrime cmp OK'); |
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var gABigInt = new BigInteger(bytesToHex(gA), 16); |
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//const _gABigInt = str2bigInt(bytesToHex(gA), 16); |
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var dhPrimeBigInt = new BigInteger(dhPrimeHex, 16); |
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//const _dhPrimeBigInt = str2bigInt(dhPrimeHex, 16); |
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//this.log('gABigInt.compareTo(BigInteger.ONE) <= 0', gABigInt.compareTo(BigInteger.ONE), BigInteger.ONE.compareTo(BigInteger.ONE), greater(_gABigInt, one)); |
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if(gABigInt.compareTo(BigInteger.ONE) <= 0) { |
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//if(!greater(_gABigInt, one)) { |
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throw new Error('[MT] DH params are not verified: gA <= 1'); |
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} |
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/* this.log('gABigInt.compareTo(dhPrimeBigInt.subtract(BigInteger.ONE)) >= 0', gABigInt.compareTo(dhPrimeBigInt.subtract(BigInteger.ONE)), |
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greater(gABigInt, sub(_dhPrimeBigInt, one))); */ |
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if(gABigInt.compareTo(dhPrimeBigInt.subtract(BigInteger.ONE)) >= 0) { |
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//if(greater(gABigInt, sub(_dhPrimeBigInt, one))) { |
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throw new Error('[MT] DH params are not verified: gA >= dhPrime - 1'); |
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} |
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this.log('1 < gA < dhPrime-1 OK'); |
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var two = new BigInteger(/* null */''); |
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two.fromInt(2); |
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//const _two = int2bigInt(2, 10, 0); |
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//this.log('_two:', bigInt2str(_two, 16), two.toString(16)); |
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var twoPow = two.pow(2048 - 64); |
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//const _twoPow = powMod(_two, int2bigInt(2048 - 64, 10, 0), null); |
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//this.log('twoPow:', twoPow.toString(16), bigInt2str(_twoPow, 16)); |
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// this.log('gABigInt.compareTo(twoPow) < 0'); |
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if(gABigInt.compareTo(twoPow) < 0) { |
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throw new Error('[MT] DH params are not verified: gA < 2^{2048-64}'); |
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} |
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if(gABigInt.compareTo(dhPrimeBigInt.subtract(twoPow)) >= 0) { |
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throw new Error('[MT] DH params are not verified: gA > dhPrime - 2^{2048-64}'); |
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} |
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this.log('2^{2048-64} < gA < dhPrime-2^{2048-64} OK'); |
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return true; |
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} |
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public async mtpSendSetClientDhParams(auth: AuthOptions): Promise<AuthOptions> { |
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var gBytes = bytesFromHex(auth.g.toString(16)); |
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auth.b = new Array(256); |
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auth.b = [...new Uint8Array(auth.b.length).randomize()]; |
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//MTProto.secureRandom.nextBytes(auth.b); |
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try { |
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var gB = await CryptoWorker.modPow(gBytes, auth.b, auth.dhPrime); |
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} catch(error) { |
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throw error; |
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} |
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var data = new TLSerialization({mtproto: true}); |
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data.storeObject({ |
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_: 'client_DH_inner_data', |
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nonce: auth.nonce, |
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server_nonce: auth.serverNonce, |
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retry_id: [0, auth.retry++], |
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g_b: gB |
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}, 'Client_DH_Inner_Data'); |
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//var dataWithHash = sha1BytesSync(data.getBuffer()).concat(data.getBytes()); |
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var dataWithHash = (await CryptoWorker.sha1Hash(data.getBuffer())).concat(data.getBytes()); |
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//var encryptedData = aesEncryptSync(dataWithHash, auth.tmpAesKey, auth.tmpAesIv); |
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var encryptedData = await CryptoWorker.aesEncrypt(dataWithHash, auth.tmpAesKey, auth.tmpAesIv); |
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var request = new TLSerialization({mtproto: true}); |
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request.storeMethod('set_client_DH_params', { |
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nonce: auth.nonce, |
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server_nonce: auth.serverNonce, |
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encrypted_data: encryptedData |
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}); |
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this.log('Send set_client_DH_params'); |
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try { |
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var deserializer = await this.mtpSendPlainRequest(auth.dcId, request.getBytes(true)); |
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} catch(err) { |
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throw err; |
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} |
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let response = deserializer.fetchObject('Set_client_DH_params_answer'); |
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if(response._ != 'dh_gen_ok' && response._ != 'dh_gen_retry' && response._ != 'dh_gen_fail') { |
|
throw new Error('[MT] Set_client_DH_params_answer response invalid: ' + response._); |
|
} |
|
|
|
if(!bytesCmp(auth.nonce, response.nonce)) { |
|
throw new Error('[MT] Set_client_DH_params_answer nonce mismatch'); |
|
} |
|
|
|
if(!bytesCmp(auth.serverNonce, response.server_nonce)) { |
|
throw new Error('[MT] Set_client_DH_params_answer server_nonce mismatch'); |
|
} |
|
|
|
try { |
|
var authKey = await CryptoWorker.modPow(auth.gA, auth.b, auth.dhPrime); |
|
} catch(err) { |
|
throw authKey; |
|
} |
|
|
|
//var authKeyHash = sha1BytesSync(authKey), |
|
let authKeyHash = await CryptoWorker.sha1Hash(authKey), |
|
authKeyAux = authKeyHash.slice(0, 8), |
|
authKeyId = authKeyHash.slice(-8); |
|
|
|
this.log('Got Set_client_DH_params_answer', response._, authKey); |
|
switch(response._) { |
|
case 'dh_gen_ok': |
|
var newNonceHash1 = (await CryptoWorker.sha1Hash(auth.newNonce.concat([1], authKeyAux))).slice(-16); |
|
//var newNonceHash1 = sha1BytesSync(auth.newNonce.concat([1], authKeyAux)).slice(-16); |
|
|
|
if(!bytesCmp(newNonceHash1, response.new_nonce_hash1)) { |
|
throw new Error('[MT] Set_client_DH_params_answer new_nonce_hash1 mismatch'); |
|
} |
|
|
|
var serverSalt = bytesXor(auth.newNonce.slice(0, 8), auth.serverNonce.slice(0, 8)); |
|
this.log('Auth successfull!', authKeyId, authKey, serverSalt); |
|
|
|
auth.authKeyId = authKeyId; |
|
auth.authKey = authKey; |
|
auth.serverSalt = serverSalt; |
|
|
|
return auth; |
|
break; |
|
|
|
case 'dh_gen_retry': |
|
//var newNonceHash2 = sha1BytesSync(auth.newNonce.concat([2], authKeyAux)).slice(-16); |
|
var newNonceHash2 = (await CryptoWorker.sha1Hash(auth.newNonce.concat([2], authKeyAux))).slice(-16); |
|
if(!bytesCmp(newNonceHash2, response.new_nonce_hash2)) { |
|
throw new Error('[MT] Set_client_DH_params_answer new_nonce_hash2 mismatch'); |
|
} |
|
|
|
return this.mtpSendSetClientDhParams(auth); |
|
|
|
case 'dh_gen_fail': |
|
//var newNonceHash3 = sha1BytesSync(auth.newNonce.concat([3], authKeyAux)).slice(-16); |
|
var newNonceHash3 = (await CryptoWorker.sha1Hash(auth.newNonce.concat([3], authKeyAux))).slice(-16); |
|
if(!bytesCmp(newNonceHash3, response.new_nonce_hash3)) { |
|
throw new Error('[MT] Set_client_DH_params_answer new_nonce_hash3 mismatch'); |
|
} |
|
|
|
throw new Error('[MT] Set_client_DH_params_answer fail'); |
|
} |
|
} |
|
|
|
// mtpAuth |
|
public async auth(dcId: number): Promise<AuthOptions> { |
|
if(dcId in this.cached) { |
|
return this.cached[dcId]; |
|
} |
|
|
|
let nonce = /* fNonce ? fNonce : */new Uint8Array(16).randomize(); |
|
/* var nonce = new Array(16); |
|
MTProto.secureRandom.nextBytes(nonce); */ |
|
|
|
if(!dcConfigurator.chooseServer(dcId)) { |
|
return Promise.reject(new Error('[MT] No server found for dc ' + dcId)); |
|
} |
|
|
|
try { |
|
let promise = this.mtpSendReqPQ({dcId, nonce}); |
|
this.cached[dcId] = promise; |
|
return await promise; |
|
} catch(err) { |
|
delete this.cached[dcId]; |
|
throw err; |
|
} |
|
} |
|
} |
|
|
|
export default new Authorizer();
|
|
|