Telegram Web K with changes to work inside I2P
https://web.telegram.i2p/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
1.2 KiB
36 lines
1.2 KiB
/* |
|
* https://github.com/morethanwords/tweb |
|
* Copyright (C) 2019-2021 Eduard Kuzmenko |
|
* https://github.com/morethanwords/tweb/blob/master/LICENSE |
|
*/ |
|
|
|
import randomize from '../../../helpers/array/randomize'; |
|
import {nextRandomUint} from '../../../helpers/random'; |
|
import {IntermediatePacketCodec} from './intermediate'; |
|
/* Data packets are aligned to 4bytes. This codec adds random bytes of size |
|
from 0 to 3 bytes, which are ignored by decoder. */ |
|
class PaddedIntermediatePacketCodec extends IntermediatePacketCodec { |
|
public tag = 0xdd; |
|
public obfuscateTag = new Uint8Array([this.tag, this.tag, this.tag, this.tag]); |
|
|
|
public encodePacket(data: Uint8Array) { |
|
const padding = randomize(new Uint8Array(nextRandomUint(8) % 3)); |
|
const len = data.byteLength + padding.byteLength; |
|
|
|
const header = new Uint8Array(new Uint32Array([len]).buffer); |
|
console.log('encodePacket', padding, len, data, header); |
|
|
|
return header.concat(data, padding); |
|
} |
|
|
|
public readPacket(data: Uint8Array) { |
|
const padLength = data.byteLength % 4; |
|
if(padLength > 0) { |
|
return data.slice(4, -padLength); |
|
} |
|
|
|
return data.slice(4); |
|
} |
|
} |
|
|
|
export default new PaddedIntermediatePacketCodec();
|
|
|