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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var EXPORTED_SYMBOLS = ["CreditCard", "NETWORK_NAMES"];
// The list of known and supported credit card network ids ("types")
// This list mirrors the networks from dom/payments/BasicCardPayment.cpp
const SUPPORTED_NETWORKS = Object.freeze([
"amex",
"cartebancaire",
"diners",
"discover",
"jcb",
"mastercard",
"mir",
"unionpay",
"visa",
]);
// This lists stores lower cased variations of popular credit card network
// names for matching against strings.
const NETWORK_NAMES = {
"american express": "amex",
"master card": "mastercard",
"union pay": "unionpay",
};
//
// Notice:
// - CarteBancaire (`4035`, `4360`) is now recognized as Visa.
// - UnionPay (`63--`) is now recognized as Discover.
// This means that the order matters.
// First we'll try to match more specific card,
// and if that doesn't match we'll test against the more generic range.
const CREDIT_CARD_IIN = [
{ type: "amex", start: 34, end: 34, len: 15 },
{ type: "amex", start: 37, end: 37, len: 15 },
{ type: "cartebancaire", start: 4035, end: 4035, len: 16 },
{ type: "cartebancaire", start: 4360, end: 4360, len: 16 },
// We diverge from Wikipedia here, because Diners card
// support length of 14-19.
{ type: "diners", start: 300, end: 305, len: [14, 19] },
{ type: "diners", start: 3095, end: 3095, len: [14, 19] },
{ type: "diners", start: 36, end: 36, len: [14, 19] },
{ type: "diners", start: 38, end: 39, len: [14, 19] },
{ type: "discover", start: 6011, end: 6011, len: [16, 19] },
{ type: "discover", start: 622126, end: 622925, len: [16, 19] },
{ type: "discover", start: 624000, end: 626999, len: [16, 19] },
{ type: "discover", start: 628200, end: 628899, len: [16, 19] },
{ type: "discover", start: 64, end: 65, len: [16, 19] },
{ type: "jcb", start: 3528, end: 3589, len: [16, 19] },
{ type: "mastercard", start: 2221, end: 2720, len: 16 },
{ type: "mastercard", start: 51, end: 55, len: 16 },
{ type: "mir", start: 2200, end: 2204, len: 16 },
{ type: "unionpay", start: 62, end: 62, len: [16, 19] },
{ type: "unionpay", start: 81, end: 81, len: [16, 19] },
{ type: "visa", start: 4, end: 4, len: 16 },
].sort((a, b) => b.start - a.start);
class CreditCard {
/**
* A CreditCard object represents a credit card, with
* number, name, expiration, network, and CCV.
* The number is the only required information when creating
* an object, all other members are optional. The number
* is validated during construction and will throw if invalid.
*
* @param {string} name, optional
* @param {string} number
* @param {string} expirationString, optional
* @param {string|number} expirationMonth, optional
* @param {string|number} expirationYear, optional
* @param {string} network, optional
* @param {string|number} ccv, optional
* @param {string} encryptedNumber, optional
* @throws if number is an invalid credit card number
*/
constructor({
name,
number,
expirationString,
expirationMonth,
expirationYear,
network,
ccv,
encryptedNumber,
}) {
this._name = name;
this._unmodifiedNumber = number;
this._encryptedNumber = encryptedNumber;
this._ccv = ccv;
this.number = number;
let { month, year } = CreditCard.normalizeExpiration({
expirationString,
expirationMonth,
expirationYear,
});
this._expirationMonth = month;
this._expirationYear = year;
this.network = network;
}
set name(value) {
this._name = value;
}
set expirationMonth(value) {
if (typeof value == "undefined") {
this._expirationMonth = undefined;
return;
}
this._expirationMonth = CreditCard.normalizeExpirationMonth(value);
}
get expirationMonth() {
return this._expirationMonth;
}
set expirationYear(value) {
if (typeof value == "undefined") {
this._expirationYear = undefined;
return;
}
this._expirationYear = CreditCard.normalizeExpirationYear(value);
}
get expirationYear() {
return this._expirationYear;
}
set expirationString(value) {
let { month, year } = CreditCard.parseExpirationString(value);
this.expirationMonth = month;
this.expirationYear = year;
}
set ccv(value) {
this._ccv = value;
}
get number() {
return this._number;
}
/**
* Sets the number member of a CreditCard object. If the number
* is not valid according to the Luhn algorithm then the member
* will get set to the empty string before throwing an exception.
*
* @param {string} value
* @throws if the value is an invalid credit card number
*/
set number(value) {
if (value) {
let normalizedNumber = CreditCard.normalizeCardNumber(value);
// Based on the information on wiki[1], the shortest valid length should be
// 12 digits (Maestro).
normalizedNumber = normalizedNumber.match(/^\d{12,}$/)
? normalizedNumber
: "";
this._number = normalizedNumber;
} else {
this._number = "";
}
if (value && !this.isValidNumber()) {
this._number = "";
throw new Error("Invalid credit card number");
}
}
get network() {
return this._network;
}
set network(value) {
this._network = value || undefined;
}
// Implements the Luhn checksum algorithm as described at
// Number digit lengths vary with network, but should fall within 12-19 range. [2]
isValidNumber() {
if (!this._number) {
return false;
}
// Remove dashes and whitespace
let number = this._number.replace(/[\-\s]/g, "");
let len = number.length;
if (len < 12 || len > 19) {
return false;
}
if (!/^\d+$/.test(number)) {
return false;
}
let total = 0;
for (let i = 0; i < len; i++) {
let ch = parseInt(number[len - i - 1], 10);
if (i % 2 == 1) {
// Double it, add digits together if > 10
ch *= 2;
if (ch > 9) {
ch -= 9;
}
}
total += ch;
}
return total % 10 == 0;
}
/**
* Normalizes a credit card number.
* @param {string} number
* @return {string | null}
* @memberof CreditCard
*/
static normalizeCardNumber(number) {
if (!number) {
return null;
}
return number.replace(/[\-\s]/g, "");
}
/**
* Attempts to match the number against known network identifiers.
*
* @param {string} ccNumber Credit card number with no spaces or special characters in it.
*
* @returns {string|null}
*/
static getType(ccNumber) {
for (let i = 0; i < CREDIT_CARD_IIN.length; i++) {
const range = CREDIT_CARD_IIN[i];
if (typeof range.len == "number") {
if (range.len != ccNumber.length) {
continue;
}
} else if (
ccNumber.length < range.len[0] ||
ccNumber.length > range.len[1]
) {
continue;
}
const prefixLength = Math.floor(Math.log10(range.start)) + 1;
const prefix = parseInt(ccNumber.substring(0, prefixLength), 10);
if (prefix >= range.start && prefix <= range.end) {
return range.type;
}
}
return null;
}
/**
* Attempts to retrieve a card network identifier based
* on a name.
*
* @param {string|undefined|null} name
*
* @returns {string|null}
*/
static getNetworkFromName(name) {
if (!name) {
return null;
}
let lcName = name
.trim()
.toLowerCase()
.normalize("NFKC");
if (SUPPORTED_NETWORKS.includes(lcName)) {
return lcName;
}
for (let term in NETWORK_NAMES) {
if (lcName.includes(term)) {
return NETWORK_NAMES[term];
}
}
return null;
}
/**
* Returns true if the card number is valid and the
* expiration date has not passed. Otherwise false.
*
* @returns {boolean}
*/
isValid() {
if (!this.isValidNumber()) {
return false;
}
let currentDate = new Date();
let currentYear = currentDate.getFullYear();
if (this._expirationYear > currentYear) {
return true;
}
// getMonth is 0-based, so add 1 because credit cards are 1-based
let currentMonth = currentDate.getMonth() + 1;
return (
this._expirationYear == currentYear &&
this._expirationMonth >= currentMonth
);
}
get maskedNumber() {
return CreditCard.getMaskedNumber(this._number);
}
get longMaskedNumber() {
return CreditCard.getLongMaskedNumber(this._number);
}
/**
* Get credit card display label. It should display masked numbers, the
* cardholder's name, and the expiration date, separated by a commas.
* In addition, the card type is provided in the accessibility label.
*/
static getLabelInfo({ number, name, month, year, type }) {
let formatSelector = ["number"];
if (name) {
formatSelector.push("name");
}
if (month && year) {
formatSelector.push("expiration");
}
let stringId = `credit-card-label-${formatSelector.join("-")}-2`;
return {
id: stringId,
args: {
number: CreditCard.getMaskedNumber(number),
name,
month: month?.toString(),
year: year?.toString(),
type,
},
};
}
/**
*
* Please use getLabelInfo above, as it allows for localization.
* @deprecated
*/
static getLabel({ number, name }) {
let parts = [];
if (number) {
parts.push(CreditCard.getMaskedNumber(number));
}
if (name) {
parts.push(name);
}
return parts.join(", ");
}
static normalizeExpirationMonth(month) {
month = parseInt(month, 10);
if (isNaN(month) || month < 1 || month > 12) {
return undefined;
}
return month;
}
static normalizeExpirationYear(year) {
year = parseInt(year, 10);
if (isNaN(year) || year < 0) {
return undefined;
}
if (year < 100) {
year += 2000;
}
return year;
}
static parseExpirationString(expirationString) {
let rules = [
{
regex: /(?:^|\D)(\d{2})(\d{2})(?!\d)/,
},
{
regex: /(?:^|\D)(\d{4})[-/](\d{1,2})(?!\d)/,
yearIndex: 0,
monthIndex: 1,
},
{
regex: /(?:^|\D)(\d{1,2})[-/](\d{4})(?!\d)/,
yearIndex: 1,
monthIndex: 0,
},
{
regex: /(?:^|\D)(\d{1,2})[-/](\d{1,2})(?!\d)/,
},
{
regex: /(?:^|\D)(\d{2})(\d{2})(?!\d)/,
},
];
expirationString = expirationString.replaceAll(" ", "");
for (let rule of rules) {
let result = rule.regex.exec(expirationString);
if (!result) {
continue;
}
let year, month;
const parsedResults = [parseInt(result[1], 10), parseInt(result[2], 10)];
if (!rule.yearIndex || !rule.monthIndex) {
month = parsedResults[0];
if (month > 12) {
year = parsedResults[0];
month = parsedResults[1];
} else {
year = parsedResults[1];
}
} else {
year = parsedResults[rule.yearIndex];
month = parsedResults[rule.monthIndex];
}
if (month >= 1 && month <= 12 && (year < 100 || year > 2000)) {
return { month, year };
}
}
return { month: undefined, year: undefined };
}
static normalizeExpiration({
expirationString,
expirationMonth,
expirationYear,
}) {
// Only prefer the string version if missing one or both parsed formats.
let parsedExpiration = {};
if (expirationString && (!expirationMonth || !expirationYear)) {
parsedExpiration = CreditCard.parseExpirationString(expirationString);
}
return {
month: CreditCard.normalizeExpirationMonth(
parsedExpiration.month || expirationMonth
),
year: CreditCard.normalizeExpirationYear(
parsedExpiration.year || expirationYear
),
};
}
static formatMaskedNumber(maskedNumber) {
return {
affix: "****",
label: maskedNumber.replace(/^\**/, ""),
};
}
static getCreditCardLogo(network) {
const THIRD_PARTY_PATH = PATH + "third-party/";
switch (network) {
case "amex":
return THIRD_PARTY_PATH + "cc-logo-amex.png";
case "cartebancaire":
return THIRD_PARTY_PATH + "cc-logo-cartebancaire.png";
case "diners":
return THIRD_PARTY_PATH + "cc-logo-diners.svg";
case "discover":
return THIRD_PARTY_PATH + "cc-logo-discover.png";
case "jcb":
return THIRD_PARTY_PATH + "cc-logo-jcb.svg";
case "mastercard":
return THIRD_PARTY_PATH + "cc-logo-mastercard.svg";
case "mir":
return THIRD_PARTY_PATH + "cc-logo-mir.svg";
case "unionpay":
return THIRD_PARTY_PATH + "cc-logo-unionpay.svg";
case "visa":
return THIRD_PARTY_PATH + "cc-logo-visa.svg";
default:
return PATH + "icon-credit-card-generic.svg";
}
}
static getMaskedNumber(number) {
return "*".repeat(4) + " " + number.substr(-4);
}
static getLongMaskedNumber(number) {
return "*".repeat(number.length - 4) + number.substr(-4);
}
/*
* Validates the number according to the Luhn algorithm. This
* method does not throw an exception if the number is invalid.
*/
static isValidNumber(number) {
try {
new CreditCard({ number });
} catch (ex) {
return false;
}
return true;
}
static isValidNetwork(network) {
return SUPPORTED_NETWORKS.includes(network);
}
static getSupportedNetworks() {
return SUPPORTED_NETWORKS;
}
/**
* Localised names for supported networks are available in
* `browser/preferences/formAutofill.ftl`.
*/
static getNetworkL10nId(network) {
return this.isValidNetwork(network)
? `autofill-card-network-${network}`
: null;
}
}