314 lines
11 KiB
TypeScript
314 lines
11 KiB
TypeScript
// eslint-disable-next-line max-len
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/* eslint-disable @typescript-eslint/no-unsafe-call,@typescript-eslint/no-unsafe-assignment,@typescript-eslint/no-unsafe-return,@typescript-eslint/no-unsafe-argument */
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// import Long from 'long'
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import Long from 'long'
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import { describe, expect, it } from 'vitest'
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import { TlBinaryReader, TlReaderMap } from './reader.js'
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// todo: replace with platform-specific packages
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const hexEncode = (buf: Uint8Array) => buf.reduce((acc, val) => acc + val.toString(16).padStart(2, '0'), '')
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const hexDecodeToBuffer = (hex: string) => new Uint8Array(hex.match(/.{1,2}/g)!.map((byte) => parseInt(byte, 16)))
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let randomBytes: (n: number) => Uint8Array
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if (import.meta.env.TEST_ENV === 'node' || import.meta.env.TEST_ENV === 'bun') {
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randomBytes = await import('crypto').then((m) => m.randomBytes)
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} else {
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randomBytes = (n: number) => {
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const buf = new Uint8Array(n)
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crypto.getRandomValues(buf)
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return buf
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}
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}
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describe('TlBinaryReader', () => {
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it('should read int32', () => {
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expect(TlBinaryReader.manual(new Uint8Array([0, 0, 0, 0])).int()).toEqual(0)
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expect(TlBinaryReader.manual(new Uint8Array([1, 0, 0, 0])).int()).toEqual(1)
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expect(TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4])).int()).toEqual(67305985)
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expect(TlBinaryReader.manual(new Uint8Array([0xff, 0xff, 0xff, 0xff])).int()).toEqual(-1)
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})
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it('should read uint32', () => {
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expect(TlBinaryReader.manual(new Uint8Array([0, 0, 0, 0])).uint()).toEqual(0)
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expect(TlBinaryReader.manual(new Uint8Array([1, 0, 0, 0])).uint()).toEqual(1)
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expect(TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4])).uint()).toEqual(67305985)
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expect(TlBinaryReader.manual(new Uint8Array([0xff, 0xff, 0xff, 0xff])).uint()).toEqual(
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4294967295,
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)
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})
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it('should read int53', () => {
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expect(TlBinaryReader.manual(new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0])).int53()).toEqual(0)
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expect(TlBinaryReader.manual(new Uint8Array([1, 0, 0, 0, 0, 0, 0, 0])).int53()).toEqual(1)
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expect(TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4, 0, 0, 0, 0])).int53()).toEqual(
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67305985,
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)
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expect(TlBinaryReader.manual(new Uint8Array([1, 0, 1, 0, 1, 0, 1, 0])).int53()).toEqual(
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281479271743489,
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)
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expect(
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TlBinaryReader.manual(
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new Uint8Array([0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff]),
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).int53(),
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).toEqual(-1)
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})
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it('should read long', () => {
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expect(
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TlBinaryReader.manual(new Uint8Array([0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff]))
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.long()
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.toString(),
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).toEqual('-1')
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expect(
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TlBinaryReader.manual(new Uint8Array([0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x56, 0x78]))
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.long()
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.toString(),
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).toEqual('8671175386481439762')
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expect(
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TlBinaryReader.manual(new Uint8Array([0x15, 0xc4, 0x15, 0xb5, 0xc4, 0x1c, 0x03, 0xa3]))
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.long()
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.toString(),
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).toEqual('-6700480189419895787')
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})
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it('should read float', () => {
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expect(TlBinaryReader.manual(new Uint8Array([0, 0, 0x80, 0x3f])).float()).toBeCloseTo(
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1,
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0.001,
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)
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expect(TlBinaryReader.manual(new Uint8Array([0xb6, 0xf3, 0x9d, 0x3f])).float()).toBeCloseTo(
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1.234,
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0.001,
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)
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expect(TlBinaryReader.manual(new Uint8Array([0xfa, 0x7e, 0x2a, 0x3f])).float()).toBeCloseTo(
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0.666,
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0.001,
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)
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})
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it('should read double', () => {
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expect(
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TlBinaryReader.manual(new Uint8Array([0, 0, 0, 0, 0, 0, 0xf0, 0x3f])).double(),
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).toBeCloseTo(1, 0.001)
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expect(
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TlBinaryReader.manual(new Uint8Array([0, 0, 0, 0, 0, 0, 0x25, 0x40])).double(),
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).toBeCloseTo(10.5, 0.001)
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expect(
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TlBinaryReader.manual(
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new Uint8Array([0x9a, 0x99, 0x99, 0x99, 0x99, 0x99, 0x21, 0x40]),
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).double(),
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).toBeCloseTo(8.8, 0.001)
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})
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it('should read raw bytes', () => {
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expect([...TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4])).raw(2)]).toEqual([1, 2])
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expect([...TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4])).raw()]).toEqual([1, 2, 3, 4])
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expect([...TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4])).raw(0)]).toEqual([])
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})
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it('should move cursor', () => {
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const reader = TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]))
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reader.int()
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expect(reader.pos).toEqual(4)
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reader.seek(-4)
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expect(reader.pos).toEqual(0)
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expect(() => reader.seek(-1)).toThrow(RangeError)
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expect(() => reader.seek(1000)).toThrow(RangeError)
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reader.uint()
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expect(reader.pos).toEqual(4)
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reader.seekTo(0)
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expect(reader.pos).toEqual(0)
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expect(() => reader.seekTo(-1)).toThrow(RangeError)
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expect(() => reader.seekTo(1000)).toThrow(RangeError)
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const checkFunction = (fn: () => void, sz: number) => {
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fn()
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expect(reader.pos).toEqual(sz)
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reader.seekTo(0)
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}
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checkFunction(() => reader.long(), 8)
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checkFunction(() => reader.float(), 4)
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checkFunction(() => reader.double(), 8)
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checkFunction(() => reader.raw(5), 5)
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})
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it('should read tg-encoded bytes', () => {
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expect([...TlBinaryReader.manual(new Uint8Array([1, 2, 3, 4])).bytes()]).toEqual([2])
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const random250bytes = randomBytes(250)
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let reader = TlBinaryReader.manual(new Uint8Array([250, ...random250bytes, 0, 0, 0, 0, 0]))
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expect([...reader.bytes()]).toEqual([...random250bytes])
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expect(reader.pos).toEqual(252)
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const random1000bytes = randomBytes(1000)
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const buffer = new Uint8Array(1010)
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buffer[0] = 254
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new DataView(buffer.buffer).setUint32(1, 1000, true)
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buffer.set(random1000bytes, 4)
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reader = TlBinaryReader.manual(buffer)
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expect([...reader.bytes()]).toEqual([...random1000bytes])
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expect(reader.pos).toEqual(1004)
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})
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const stubObjectsMap: TlReaderMap = {
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'3735928559': function (r) {
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return { a: r.int(), b: r.object() }
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},
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'3131949278': function (r) {
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return r.uint()
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},
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'4207861421': () => 42,
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'3200191549': function (r) {
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return { vec: r.vector(r.uint) }
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},
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}
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it('should read tg-encoded objects', () => {
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const buffer = new Uint8Array([
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0xef,
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0xbe,
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0xad,
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0xde, // 0xdeadbeef object
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/**/ 0x01,
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0x00,
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0x00,
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0x00, // a = int32 1
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/**/ 0xad,
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0xde,
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0xce,
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0xfa, // b = 0xfacedead object (aka constant 42)
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0xde,
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0xc0,
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0xad,
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0xba, // 0xbaadc0de object
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/**/ 0x02,
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0x00,
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0x00,
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0x00, // int32 2
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])
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const reader = new TlBinaryReader(stubObjectsMap, buffer)
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const deadBeef = reader.object()
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expect(deadBeef).toEqual({ a: 1, b: 42 })
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const baadCode = reader.object()
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expect(baadCode).toEqual(2)
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})
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it('should read tg-encoded vectors', () => {
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const buffer = new Uint8Array([
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0x15,
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0xc4,
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0xb5,
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0x1c, // 0x1cb5c415 object (vector)
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/**/ 0x03,
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0x00,
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0x00,
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0x00, // vector size (3)
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/**/ 0xef,
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0xbe,
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0xad,
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0xde, // 0xdeadbeef object
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/****/ 0x01,
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0x00,
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0x00,
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0x00, // a = int32 1
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/****/ 0xad,
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0xde,
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0xce,
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0xfa, // 0xfacedead object (aka constant 42)
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/**/ 0xde,
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0xc0,
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0xad,
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0xba, // 0xbaadc0de object
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/****/ 0x02,
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0x00,
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0x00,
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0x00, // int32 2
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/**/ 0x3d,
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0x0c,
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0xbf,
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0xbe, // 0xbebf0c3d object
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/****/ 0x15,
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0xc4,
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0xb5,
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0x1c, // 0x1cb5c415 object (vector)
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/******/ 0x02,
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0x00,
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0x00,
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0x00, // vector size (2)
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/******/ 0x01,
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0x00,
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0x00,
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0x00, // int32 1
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/******/ 0x02,
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0x00,
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0x00,
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0x00, // int32 2
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])
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const reader = new TlBinaryReader(stubObjectsMap, buffer)
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const vector = reader.vector()
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expect(vector).toEqual([{ a: 1, b: 42 }, 2, { vec: [1, 2] }])
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reader.seekTo(0)
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const vectorObj = reader.object()
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expect(vector).toEqual(vectorObj)
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})
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describe('examples from documentation', () => {
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// https://core.telegram.org/mtproto/samples-auth_key#2-a-response-from-the-server-has-been-received-with-the-following-content
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it('should be able to read resPQ', () => {
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const input =
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'000000000000000001c8831ec97ae55140000000632416053e0549828cca27e966b301a48fece2fca5cf4d33f4a11ea877ba4aa5739073300817ed48941a08f98100000015c4b51c01000000216be86c022bb4c3'
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const map: TlReaderMap = {
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'85337187': function (r) {
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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const ret: any = {}
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ret._ = 'mt_resPQ'
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ret.nonce = r.int128()
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ret.serverNonce = r.int128()
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ret.pq = r.bytes()
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ret.serverPublicKeyFingerprints = r.vector(r.long)
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return ret
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},
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}
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const expected = {
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nonce: hexDecodeToBuffer('3E0549828CCA27E966B301A48FECE2FC'),
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serverNonce: hexDecodeToBuffer('A5CF4D33F4A11EA877BA4AA573907330'),
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pq: hexDecodeToBuffer('17ED48941A08F981'),
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serverPublicKeyFingerprints: [Long.fromString('c3b42b026ce86b21', false, 16)],
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}
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const r = new TlBinaryReader(map, hexDecodeToBuffer(input))
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expect(r.long().toString()).toEqual('0') // authKeyId
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expect(r.long().toString(16)).toEqual('51E57AC91E83C801'.toLowerCase()) // messageId
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expect(r.uint()).toEqual(64) // messageLength
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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const obj = r.object() as any
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expect(obj._).toEqual('mt_resPQ')
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expect(hexEncode(obj.nonce)).toEqual(hexEncode(expected.nonce))
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expect(hexEncode(obj.serverNonce)).toEqual(hexEncode(expected.serverNonce))
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expect(hexEncode(obj.pq)).toEqual(hexEncode(expected.pq))
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expect(obj.serverPublicKeyFingerprints.length).toEqual(1)
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expect(obj.serverPublicKeyFingerprints[0].toString(16)).toEqual(
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expected.serverPublicKeyFingerprints[0].toString(16),
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)
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})
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})
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})
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