Telegram Web K with changes to work inside I2P
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167 lines
5.1 KiB
167 lines
5.1 KiB
//import aesjs from 'aes-js'; |
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import AES from "@cryptography/aes"; |
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import { bytesFromWordss } from "../../../helpers/bytes"; |
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import { Codec } from "./codec"; |
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class Counter { |
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_counter: Uint8Array; |
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constructor(initialValue: Uint8Array) { |
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this._counter = initialValue; |
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} |
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increment() { |
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for(let i = 15; i >= 0; i--) { |
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if(this._counter[i] === 255) { |
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this._counter[i] = 0; |
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} else { |
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this._counter[i]++; |
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break; |
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} |
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} |
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} |
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} |
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class CTR { |
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_counter: Counter; |
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_remainingCounter: Uint8Array = null; |
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_remainingCounterIndex = 16; |
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_aes: AES; |
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constructor(key: Uint8Array, counter: Uint8Array) { |
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this._counter = new Counter(counter); |
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this._aes = new AES(key); |
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} |
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update(payload: Uint8Array) { |
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const encrypted = payload.slice(); |
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for(let i = 0; i < encrypted.length; i++) { |
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if(this._remainingCounterIndex === 16) { |
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this._remainingCounter = new Uint8Array(bytesFromWordss(this._aes.encrypt(this._counter._counter))); |
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this._remainingCounterIndex = 0; |
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this._counter.increment(); |
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} |
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encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++]; |
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} |
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return encrypted; |
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} |
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} |
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/* |
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@cryptography/aes не работает с массивами которые не кратны 4, поэтому использую intermediate а не abridged |
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*/ |
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export default class Obfuscation { |
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/* public enc: aesjs.ModeOfOperation.ModeOfOperationCTR; |
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public dec: aesjs.ModeOfOperation.ModeOfOperationCTR; */ |
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public encNew: CTR; |
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public decNew: CTR; |
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public init(codec: Codec) { |
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const initPayload = new Uint8Array(64); |
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initPayload.randomize(); |
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while(true) { |
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let val = (initPayload[3] << 24) | (initPayload[2] << 16) | (initPayload[1] << 8) | (initPayload[0]); |
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let val2 = (initPayload[7] << 24) | (initPayload[6] << 16) | (initPayload[5] << 8) | (initPayload[4]); |
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if(initPayload[0] !== 0xef && |
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val !== 0x44414548 && |
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val !== 0x54534f50 && |
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val !== 0x20544547 && |
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val !== 0x4954504f && |
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val !== 0xeeeeeeee && |
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val !== 0xdddddddd && |
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val2 !== 0x00000000) { |
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//initPayload[56] = initPayload[57] = initPayload[58] = initPayload[59] = transport; |
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break; |
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} |
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initPayload.randomize(); |
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} |
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////////////////////////initPayload.subarray(60, 62).hex = dcId; |
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/* initPayload.set(new Uint8Array([161, 208, 67, 71, 118, 109, 20, 111, 113, 255, 134, 10, 159, 241, 7, 44, 217, 82, 187, 76, 108, 131, 200, 186, 33, 57, 177, 251, 52, 34, 18, 54, 65, 105, 37, 89, 38, 20, 47, 168, 126, 181, 24, 138, 212, 68, 60, 150, 225, 37, 181, 4, 201, 50, 72, 151, 168, 143, 204, 169, 81, 187, 241, 23])); |
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console.log('initPayload', initPayload); */ |
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const reversedPayload = initPayload.slice().reverse(); |
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const encKey = initPayload.slice(8, 40); |
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const encIv = initPayload.slice(40, 56); |
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const decKey = reversedPayload.slice(8, 40); |
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const decIv = reversedPayload.slice(40, 56); |
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/* this.enc = new aesjs.ModeOfOperation.ctr(encKey, new aesjs.Counter(encIv as any)); |
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this.dec = new aesjs.ModeOfOperation.ctr(decKey, new aesjs.Counter(decIv as any)); */ |
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console.log('encKey', encKey.hex, encIv.hex); |
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console.log('decKey', decKey.hex, decIv.hex); |
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this.encNew = new CTR(encKey, encIv); |
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this.decNew = new CTR(decKey, decIv); |
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initPayload.set(codec.obfuscateTag, 56); |
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const encrypted = this.encode(initPayload); |
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//console.log('encrypted', encrypted); |
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initPayload.set(encrypted.slice(56, 64), 56); |
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return initPayload; |
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} |
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/* public encode(payload: Uint8Array) { |
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let startTime = performance.now(); |
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let res = this.enc.encrypt(payload); |
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let time = performance.now() - startTime; |
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try { |
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startTime = performance.now(); |
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let arr = this.encNew.encrypt(payload); |
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//let resNew = bytesFromWords({words: arr, sigBytes: arr.length}); |
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let resNew = new Uint8Array(bytesFromWordss(arr)); |
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let time2 = performance.now() - startTime; |
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console.log('Obfuscation: encode comparison:', res, arr, resNew, res.hex === resNew.hex, time2 < time); |
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} catch(err) { |
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console.error('Obfuscation: error:', err); |
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} |
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return res; |
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} |
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public decode(payload: Uint8Array) { |
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let res = this.dec.encrypt(payload); |
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try { |
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let arr = this.decNew.decrypt(payload); |
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//let resNew = bytesFromWords({words: arr, sigBytes: arr.length}); |
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let resNew = new Uint8Array(bytesFromWordss(arr)); |
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console.log('Obfuscation: decode comparison:', res, arr, resNew, res.hex === resNew.hex); |
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} catch(err) { |
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console.error('Obfuscation: error:', err); |
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} |
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return res; |
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} */ |
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public encode(payload: Uint8Array) { |
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return this.encNew.update(payload); |
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} |
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public decode(payload: Uint8Array) { |
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return this.decNew.update(payload); |
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} |
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/* public encode(payload: Uint8Array) { |
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let res = this.encNew.encrypt(payload); |
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let bytes = new Uint8Array(bytesFromWordss(res)); |
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return bytes; |
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} |
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public decode(payload: Uint8Array) { |
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let res = this.decNew.decrypt(payload); |
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let bytes = new Uint8Array(bytesFromWordss(res)); |
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return bytes; |
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} */ |
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} |