bootstrapvalidator/src/js/validator/cvv.js

(function($) {
    $.fn.bootstrapValidator.validators.cvv = {
        html5Attributes: {
            message: 'message',
            ccfield: 'creditCardField'
        },

        /**
         * Return true if the input value is a valid CVV number.
         *
         * @param {BootstrapValidator} validator The validator plugin instance
         * @param {jQuery} $field Field element
         * @param {Object} options Can consist of the following keys:
         * - creditCardField: The credit card number field. It can be null
         * - message: The invalid message
         * @returns {Boolean}
         */
        validate: function(validator, $field, options) {
            var value = $field.val();
            if (value == '') {
                return true;
            }

            if (!/^[0-9]{3,4}$/.test(value)) {
                return false;
            }

            if (!options.creditCardField) {
                return true;
            }

            // Get the credit card number
            var creditCard = validator.getFieldElements(options.creditCardField).val();
            if (creditCard == '') {
                return true;
            }
            
            creditCard = creditCard.replace(/\D/g, '');

            // Supported credit card types
            var cards = {
                AMERICAN_EXPRESS: {
                    length: [15],
                    prefix: ['34', '37']
                },
                DINERS_CLUB: {
                    length: [14],
                    prefix: ['300', '301', '302', '303', '304', '305', '36']
                },
                DINERS_CLUB_US: {
                    length: [16],
                    prefix: ['54', '55']
                },
                DISCOVER: {
                    length: [16],
                    prefix: ['6011', '622126', '622127', '622128', '622129', '62213',
                             '62214', '62215', '62216', '62217', '62218', '62219',
                             '6222', '6223', '6224', '6225', '6226', '6227', '6228',
                             '62290', '62291', '622920', '622921', '622922', '622923',
                             '622924', '622925', '644', '645', '646', '647', '648',
                             '649', '65']
                },
                JCB: {
                    length: [16],
                    prefix: ['3528', '3529', '353', '354', '355', '356', '357', '358']
                },
                LASER: {
                    length: [16, 17, 18, 19],
                    prefix: ['6304', '6706', '6771', '6709']
                },
                MAESTRO: {
                    length: [12, 13, 14, 15, 16, 17, 18, 19],
                    prefix: ['5018', '5020', '5038', '6304', '6759', '6761', '6762', '6763', '6764', '6765', '6766']
                },
                MASTERCARD: {
                    length: [16],
                    prefix: ['51', '52', '53', '54', '55']
                },
                SOLO: {
                    length: [16, 18, 19],
                    prefix: ['6334', '6767']
                },
                UNIONPAY: {
                    length: [16, 17, 18, 19],
                    prefix: ['622126', '622127', '622128', '622129', '62213', '62214',
                             '62215', '62216', '62217', '62218', '62219', '6222', '6223',
                             '6224', '6225', '6226', '6227', '6228', '62290', '62291',
                             '622920', '622921', '622922', '622923', '622924', '622925']
                },
                VISA: {
                    length: [16],
                    prefix: ['4']
                }
            };
            var type, i, creditCardType = null;
            for (type in cards) {
                for (i in cards[type]['prefix']) {
                    if (creditCard.substr(0, cards[type]['prefix'][i].length) == cards[type]['prefix'][i]   // Check the prefix
                        && cards[type]['length'].indexOf(creditCard.length) != -1)                          // and length
                    {
                        creditCardType = type;
                        break;
                    }
                }
            }

            return (creditCardType == null)
                        ? false
                        : (('AMERICAN_EXPRESS' == creditCardType) ? (value.length == 4) : (value.length == 3));
        }
    };
}(window.jQuery));