emv/lib/emv-tags.js

EMV / Chip and PIN library

'use strict';

var _tlv = _interopRequireDefault(require("tlv"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

var emvTags = {
  '4F': 'APP_IDENTIFIER',
  '50': 'APP_LABEL',
  '57': 'TRACK_2',
  '5A': 'PAN',
  '5F20': 'CARDHOLDER_NAME',
  '5F24': 'APP_EXPIRY',
  '5F25': 'APP_EFFECTIVE',
  '5F28': 'ISSUER_COUNTRY_CODE',
  '5F2A': 'TRANSACTION_CURRENCY_CODE',
  '5F2D': 'LANGUAGE_PREFERENCE',
  '5F30': 'SERVICE_CODE',
  '5F34': 'PAN_SEQUENCE_NUMBER',
  '5F36': 'TRANSACTION_CURRENCY_EXPONENT',
  '5F50': 'ISSUER_URL',
  '61': 'APPLICATION_TEMPLATE',
  '6F': 'FILE_CONTROL_log',
  '70': 'EMV_APP_ELEMENTARY_FILE',
  '71': 'ISSUER_SCRIPT_TEMPLATE_1',
  '72': 'ISSUER_SCRIPT_TEMPLATE_2',
  '77': 'RESPONSE_TEMPLATE_2',
  '80': 'RESPONSE_TEMPLATE_1',
  '81': 'AUTH_AMOUNT_BIN',
  '82': 'APP_INTERCHANGE_PROFILE',
  '83': 'COMMAND_TEMPLATE',
  '84': 'DEDICATED_FILE_NAME',
  '86': 'ISSUER_SCRIPT_CMD',
  '87': 'APP_PRIORITY',
  '88': 'SFI',
  '89': 'AUTH_IDENTIFICATION_RESPONSE',
  '8A': 'AUTH_RESPONSE_CODE',
  '8C': 'CDOL_1',
  '8D': 'CDOL_2',
  '8E': 'CVM_LIST',
  '8F': 'CA_PK_INDEX',
  '90': 'ISSUER_PK_CERTIFICATE',
  '91': 'ISSUER_AUTH_DATA',
  '92': 'ISSUER_PK_REMAINDER',
  '93': 'SIGNED_STATIC_APPLICATION_DATA',
  '94': 'APP_FILE_LOCATOR',
  '95': 'TERMINAL_VERIFICATION_RESULTS',
  '98': 'TC_HASH_VALUE',
  '99': 'TRANSACTION_PIN_DATA',
  '9A': 'TRANSACTION_DATE',
  '9B': 'TRANSACTION_STATUS_logRMATION',
  '9C': 'TRANSACTION_TYPE',
  '9D': 'DIRECTORY_DEFINITION_FILE',
  '9F01': 'ACQUIRER_ID',
  '9F02': 'AUTH_AMOUNT_NUM',
  '9F03': 'OTHER_AMOUNT_NUM',
  '9F04': 'OTHER_AMOUNT_BIN',
  '9F05': 'APP_DISCRETIONARY_DATA',
  '9F06': 'AID_TERMINAL',
  '9F07': 'APP_USAGE_CONTROL',
  '9F08': 'APP_VERSION_NUMBER',
  '9F09': 'APP_VERSION_NUMBER_TERMINAL',
  '9F0D': 'IAC_DEFAULT',
  '9F0E': 'IAC_DENIAL',
  '9F0F': 'IAC_ONLINE',
  '9F10': 'ISSUER_APPLICATION_DATA',
  '9F11': 'ISSUER_CODE_TABLE_IDX',
  '9F12': 'APP_PREFERRED_NAME',
  '9F13': 'LAST_ONLINE_ATC',
  '9F14': 'LOWER_OFFLINE_LIMIT',
  '9F15': 'MERCHANT_CATEGORY_CODE',
  '9F16': 'MERCHANT_ID',
  '9F17': 'PIN_TRY_COUNT',
  '9F18': 'ISSUER_SCRIPT_ID',
  '9F1A': 'TERMINAL_COUNTRY_CODE',
  '9F1B': 'TERMINAL_FLOOR_LIMIT',
  '9F1C': 'TERMINAL_ID',
  '9F1D': 'TRM_DATA',
  '9F1E': 'IFD_SERIAL_NUM',
  '9F1F': 'TRACK_1_DD',
  '9F21': 'TRANSACTION_TIME',
  '9F22': 'CA_PK_INDEX_TERM',
  '9F23': 'UPPER_OFFLINE_LIMIT',
  '9F26': 'APPLICATION_CRYPTOGRAM',
  '9F27': 'CRYPTOGRAM_logRMATION_DATA',
  '9F2D': 'ICC_PIN_ENCIPHERMENT_PK_CERT',
  '9F32': 'ISSUER_PK_EXPONENT',
  '9F33': 'TERMINAL_CAPABILITIES',
  '9F34': 'CVM_RESULTS',
  '9F35': 'APP_TERMINAL_TYPE',
  '9F36': 'APP_TRANSACTION_COUNTER',
  '9F37': 'APP_UNPREDICATABLE_NUMBER',
  '9F38': 'ICC_PDOL',
  '9F39': 'POS_ENTRY_MODE',
  '9F3A': 'AMOUNT_REF_CURRENCY',
  '9F3B': 'APP_REF_CURRENCY',
  '9F3C': 'TRANSACTION_REF_CURRENCY_CODE',
  '9F3D': 'TRANSACTION_REF_CURRENCY_EXPONENT',
  '9F40': 'ADDITIONAL_TERMINAL_CAPABILITIES',
  '9F41': 'TRANSACTION_SEQUENCE_COUNTER',
  '9F42': 'APP_CURRENCY_CODE',
  '9F43': 'APP_REF_CURRENCY_EXPONENT',
  '9F44': 'APP_CURRENCY_EXPONENT',
  '9F45': 'DATA_AUTH_CODE',
  '9F46': 'ICC_PK_CERTIFICATE',
  '9F47': 'ICC_PK_EXPONENT',
  '9F48': 'ICC_PK_REMAINDER',
  '9F49': 'DDOL',
  '9F4A': 'STATIC_DATA_AUTHENTICATION_TAG_LIST',
  '9F4C': 'ICC_DYNAMIC_NUMBER',
  'A5': 'FCI_TEMPLATE',
  'BF0C': 'FCI_ISSUER_DD'
};

function toString(data) {
  var value = data.value;
  var decoded = '\n';

  if (Buffer.isBuffer(value)) {
    decoded = value.toString() + ' ' + value.toString('hex');
  }

  var str = '' + data.tag.toString(16) + ' (' + emvTags[data.tag.toString(16).toUpperCase()] + ') ' + decoded;

  if (data.value && Array.isArray(data.value)) {
    data.value.forEach(function (child) {
      str += '\t' + toString(child);
    });
  }

  str += '\n';
  return str;
}

function find(data, tag) {
  if (data.tag === tag) {
    return data.value;
  } else if (data.value && Array.isArray(data.value)) {
    for (var i = 0; i < data.value.length; i++) {
      var result = find(data.value[i], tag);
      if (result) return result;
    }
  }
}

function format(response) {
  return toString(_tlv["default"].parse(response.buffer));
}

function findTag(response, tag) {
  return find(_tlv["default"].parse(response.buffer), tag);
}

module.exports = {
  format: format,
  findTag: findTag
};