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import { Md5 } from "./deps.ts";
const encoder = new TextEncoder();const decoder = new TextDecoder();
export function md5(str: string | ArrayBuffer): string {  return new Md5().update(str).toString();}
export function Md5Password(  user: string,  password: string,  salt: Uint8Array,): string {  const val = md5(password + user);  const md5WithSalt = md5(concatUint8Array([encoder.encode(val), salt]));  return "md5" + md5WithSalt;}
export async function readMsg(reader: Deno.Reader): Promise<Uint8Array | null> {  const arr: Uint8Array[] = [];  const n = 1000;  let readed: number | null;  while (true) {    const p: Uint8Array = new Uint8Array(n);    readed = await reader.read(p);    if (readed === null) break;    if (readed < n) {      arr.push(p.subarray(0, readed));      break;    } else {      arr.push(p);    }  }  if (readed === null) return readed;  const result = concatUint8Array(arr);  return result;}
export function concatUint8Array(arr: Uint8Array[]): Uint8Array {  const length = arr.reduce((pre, next) => pre + next.length, 0);  const result = new Uint8Array(length);  let offset = 0;  for (const v of arr) {    result.set(v, offset);    offset += v.length;  }  return result;}
export function readUInt16BE(buffer: Uint8Array, offset: number = 0): number {  offset = offset >>> 0;  return buffer[offset] | (buffer[offset + 1] << 8);}
export function readInt16BE(buffer: Uint8Array, offset: number): number {  offset = offset >>> 0;  const val = buffer[offset + 1] | (buffer[offset] << 8);  return val & 0x8000 ? val | 0xffff0000 : val;}
export function readInt32BE(buffer: Uint8Array, offset: number = 0): number {  offset = offset >>> 0;
  return (    (buffer[offset] << 24) |    (buffer[offset + 1] << 16) |    (buffer[offset + 2] << 8) |    buffer[offset + 3]  );}
export function readUInt32BE(buffer: Uint8Array, offset: number = 0): number {  offset = offset >>> 0;
  return (    buffer[offset] * 0x1000000 +    ((buffer[offset + 1] << 16) |      (buffer[offset + 2] << 8) |      buffer[offset + 3])  );}