Answers SSO ruby example

CryptographyUtil.rb

require 'openssl'
require 'base64'

    def redirect_url()
          user_data = {
              'id': 'user_id',
              'email': 'user_email',
              'firstName': 'user_firstName',
              'lastName': 'user_lastName',
              'timestamp': (Time.now.to_f * 1000).to_i          
          }
          
          answersRedirectUrl = 'redirect_url'
          token = encrypt(user_data.to_json)
          answersRedirectUrl + '&token=' + token + '&key=' + 'your_key'
    end


    def encrypt(string)

      salt = OpenSSL::Random.random_bytes(16)
      cipher = OpenSSL::Cipher.new('AES-128-CBC')
      cipher.encrypt

      key_iv = OpenSSL::PKCS5.pbkdf2_hmac_sha1('your_secret', salt, 1024, cipher.key_len+cipher.iv_len)
      key = key_iv[0, cipher.key_len]
      iv  = key_iv[cipher.key_len, cipher.iv_len]

      cipher.key = key
      cipher.iv  = iv

      encrypted = '' << cipher.update(string) << cipher.final
      [encrypted, iv, salt].map {|v| ::Base64.urlsafe_encode64(v)}.join("--") 
    
    end