Class: GenerateJwtToken

Inherits:
Object
  • Object
show all
Defined in:
lib/AuthenticationSDK/authentication/jwt/JwtToken.rb

Instance Method Summary collapse

Instance Method Details

#getJwtBody(request_type, gmtDatetime, merchantconfig_obj) ⇒ Object 



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# File 'lib/AuthenticationSDK/authentication/jwt/JwtToken.rb', line 63

def getJwtBody(request_type, gmtDatetime, merchantconfig_obj)
  if request_type == Constants::POST_REQUEST_TYPE || request_type == Constants::PUT_REQUEST_TYPE || request_type == Constants::PATCH_REQUEST_TYPE
    payload = merchantconfig_obj.requestJsonData

    # Note: Digest is not passed for GET calls
    digest = DigestGeneration.new.generateDigest(payload)
    jwtBody = "{\n      \"digest\":\"" + digest + "\", \"digestAlgorithm\":\"SHA-256\", \"iat\":\"" + gmtDatetime + "\"}"
  elsif request_type == Constants::GET_REQUEST_TYPE || request_type == Constants::DELETE_REQUEST_TYPE
    jwtBody = "{\n \"iat\":\"" + gmtDatetime + "\"\n} \n\n"
  else
    raise StandardError.new(Constants::ERROR_PREFIX + Constants::INVALID_REQUEST_TYPE_METHOD)
  end
end

#getToken(merchantconfig_obj, gmtDatetime) ⇒ Object

JWT Token-generated based on the Request type



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# File 'lib/AuthenticationSDK/authentication/jwt/JwtToken.rb', line 17

def getToken(merchantconfig_obj,gmtDatetime)
  @log_obj = Log.new merchantconfig_obj.log_config, "JwtToken"

  jwtBody = ''
  request_type = merchantconfig_obj.requestType.upcase
  filePath = merchantconfig_obj.keysDirectory + '/' + merchantconfig_obj.keyFilename + '.p12'

  if (!File.exist?(filePath))
    raise Constants::ERROR_PREFIX + Constants::FILE_NOT_FOUND + File.expand_path(filePath)
  end

  p12File = File.binread(filePath)
  jwtBody=getJwtBody(request_type, gmtDatetime, merchantconfig_obj)
  claimSet = JSON.parse(jwtBody)
  p12FilePath = OpenSSL::PKCS12.new(p12File, merchantconfig_obj.keyPass)

  # Generating certificate.
  cacheObj = ActiveSupport::Cache::MemoryStore.new
  x5Cert = Cache.new.fetchCachedCertificate(filePath, p12File, merchantconfig_obj.keyPass, cacheObj)

  # Generating Public key.
  publicKey = OpenSSL::PKey::RSA.new(p12FilePath.key.public_key)

  #Generating Private Key
  privateKey = OpenSSL::PKey::RSA.new(p12FilePath.key)

  # JWT token-Generates using RS256 algorithm only
  x5clist = [x5Cert]
  customHeaders = {}
  customHeaders['v-c-merchant-id'] = merchantconfig_obj.keyAlias
  customHeaders['x5c'] = x5clist

  # Generating JWT token
  token = JWT.encode(claimSet, privateKey, 'RS256', customHeaders)
  return token
rescue StandardError => err
  if err.message.include? 'PKCS12_parse: mac verify failure'
    @log_obj.logger.error(ExceptionHandler.new.new_custom_error Constants::ERROR_PREFIX + Constants::INCORRECT_KEY_PASS)
    # exit!
  else
    @log_obj.logger.error(ExceptionHandler.new.new_api_exception err)
    # exit!
  end
  raise err
end