nakov

let elliptic = require('elliptic');
let sha3 = require('js-sha3');
let ec = new elliptic.ec('secp256k1');

// let keyPair = ec.genKeyPair();
let keyPair = ec.keyFromPrivate("97ddae0f3a25b92268175400149d65d6887b9cefaf28ea2c078e05cdc15a3c0a");
let privKey = keyPair.getPrivate("hex");
let pubKey = keyPair.getPublic();
console.log(`Private key: ${privKey}`);
console.log("Public key :", pubKey.encode("hex").substr(2));

nakov

ffmpeg version 2020-11-29-git-f194cedfe6-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable

nakov

Containers, Cloud and DevOps

Containers, Cloud and DevOps (88 hours).

Virtualization and containers, Docker, DevOps, cloud technologies and platforms. Exercises with Docker, Azure and GitHub Actions.

Course Program

Part I: Containers

nakov

def modular_sqrt(a, p):

    def legendre_symbol(a, p):
        """ Compute the Legendre symbol a|p using
            Euler's criterion. p is a prime, a is
            relatively prime to p (if p divides
            a, then a|p = 0)

            Returns 1 if a has a square root modulo
            p, -1 otherwise.

nakov

const aes = require("aes-js");
const argon2 = require("argon2");
const crypto = require("crypto");
const cryptoJS = require("crypto-js");

// Encrypt using AES-256-CTR-Argon2-HMAC-SHA-256
async function aes256ctrEncrypt(plaintext, password) {
    let argon2salt = crypto.randomBytes(16); // 128-bit salt for argon2
    let argon2Settings = { type: argon2.argon2di, raw: true,
        timeCost: 8, memoryCost: 2 ** 15, parallelism: 2,

nakov

import org.bouncycastle.util.encoders.Hex;
import org.web3j.crypto.*;
import java.math.BigInteger;

public class ECCExample {

    public static String compressPubKey(BigInteger pubKey) {
        String pubKeyYPrefix = pubKey.testBit(0) ? "03" : "02";
        String pubKeyHex = pubKey.toString(16);
        String pubKeyX = pubKeyHex.substring(0, 64);

nakov

import { sleep, group, check } from "k6";
import http from "k6/http";

export let options = {
  thresholds: {
    // 95% of requests must finish within 500 ms & 99% within 1500 ms
    http_req_duration: ['p(95) < 500', 'p(99) < 1500'],
  },
};

nakov

Shelly.call(
  "HTTP.GET", 
  {"url": "https://api.zippopotam.us/us/90210"},
  function (response) {
    if (response && response.code && response.code === 200) {
       print(JSON.stringify(response.body));
       Shelly.emitEvent("HTTP-result", response.body);
    }
    else {
       print("Error: HTTP request failed.");

nakov

function shellyPlugSChangeLEDColor(red, green, blue, brightness) {
  let config = {
      "config": {
          "leds": {
              "colors": {
                  "switch:0": {
                      "on": {
                          "rgb": [red, green, blue],
                          "brightness": brightness
                      }

nakov

Num (standard): 123.131000
Num (no trailing zeros): 123.131