truongnmt

# @param {String} s
# @param {String} t
# @return {Boolean}
# def is_subsequence(s, t)
#   i = 0
#   t.each_char do |c|
#       i += 1 if c == s[i]
#   end
#   i == s.length
# end

truongnmt

# @param {Character[][]} board
# @param {Integer[]} click
# @return {Character[][]}
# def update_board(board, click)
#   y = click[0]
#   x = click[1]
#   total_x = board[0].length
#   total_y = board.length

#   board[y][x] = 'X' if board[y][x] == 'M'

truongnmt

def serialize_into_session(record)
  [record.to_key, record.authenticatable_salt]
end

truongnmt

def authenticatable_salt
  encrypted_password[0,29] if encrypted_password
end

truongnmt

def serialize_from_session(key, salt)
  record = to_adapter.get(key)
  record if record && record.authenticatable_salt == salt
end

truongnmt

class User < ApplicationRecord

  devise :database_authenticatable, :recoverable, :rememberable
         
  def authenticatable_salt
    return super unless session_token

    "#{super}#{session_token}"
  end

truongnmt

class RegistrationsController < ApplicationController
  def create
    user = User.new(username: params[:registration][:username])

    create_options = WebAuthn::Credential.options_for_create(
      user: {
        name: params[:registration][:username],
        id: user.webauthn_id
      }
    )

truongnmt

{
  "challenge": "Wj4vWoL1BeG0PB8iJTKMfvLH8rBt3CA6PfM4QBIyKmU",
  "timeout": 120000,
  "rp": { "name": "WebAuthn Rails Demo App" },
  "user": {
    "name": "truongnmt",
    "id": "OXtCbb6VcBaLFC5GBOjIfpKYCMxJom04VPw9c-WRvhJ5uAHWhBkQZk_-0NGOmNnK4Yx2G5Pw9nyLLRKZkkCndA",
    "displayName": "truong"
  },
  "pubKeyCredParams": [

truongnmt

  create(event) {
    var [data, status, xhr] = event.detail;
    console.log(data);
    var credentialOptions = data;

    // Registration
    if (credentialOptions["user"]) {
      var credential_nickname = event.target.querySelector("input[name='registration[nickname]']").value;
      var callback_url = `/registration/callback?credential_nickname=${credential_nickname}`

truongnmt

function create(callbackUrl, credentialOptions) {
  WebAuthnJSON.create({ "publicKey": credentialOptions }).then(function(credential) {
    callback(callbackUrl, credential);
  }).catch(function(error) {
    showMessage(error);
  });

  console.log("Creating new public key credential...");
}