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/** * @package HikaShop for Joomla! * @version 2.2.3 * @author hikashop.com * @copyright (C) 2010-2013 HIKARI SOFTWARE. All rights reserved. * @license GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html / /================================================================================================/ / This routine checks the credit card number. The following checks are made: 1. A number has been provided 2. The number is a right length for the card 3. The number has an appropriate prefix for the card 4. The number has a valid modulus 10 number check digit if required If the validation fails an error is reported. The structure of credit card formats was gleaned from a variety of sources on the web, although the best is probably on Wikepedia ("Credit card number"): http://en.wikipedia.org/wiki/Credit_card_number Parameters: cardnumber number on the card cardname name of card as defined in the card list below Author: John Gardner Date: 1st November 2003 Updated: 26th Feb. 2005 Additional cards added by request Updated: 27th Nov. 2006 Additional cards added from Wikipedia Updated: 18th Jan. 2008 Additional cards added from Wikipedia Updated: 26th Nov. 2008 Maestro cards extended Updated: 19th Jun. 2009 Laser cards extended from Wikipedia Updated: 11th Sep. 2010 Typos removed from Diners and Solo definitions (thanks to Noe Leon) / / If a credit card number is invalid, an error reason is loaded into the global ccErrorNo variable. This can be be used to index into the global error string array to report the reason to the user if required: e.g. if (!checkCreditCard (number, name) alert (ccErrors(ccErrorNo); / var ccErrorNo = 0; function hikashopValidateExpDate(month,year){ var cardexp = /^[0-9]{2}$/; if (!cardexp.exec(month) \|\| !cardexp.exec(year)) { alert(ccHikaErrors[5]); return false; } var ccExpYear = 20 + year; if(month > 12){ alert(ccHikaErrors[5]); return false; } var ccExpMonth = month; var ccExpDay = [31,((!(ccExpYear % 4 ) && ( (ccExpYear % 100 ) \|\| !( ccExpYear % 400 ) ))?29:28),31,30,31,30,31,31,30,31,30,31][ccExpMonth-1]; var expDate=new Date(); expDate.setFullYear(ccExpYear, ccExpMonth-1, ccExpDay); expDate.setMonth(ccExpMonth-1); expDate.setDate(ccExpDay); var today = new Date(); if (expDate<today){ alert(ccHikaErrors[5]); return false; } return true; } function hikashopCheckCreditCard(cardnumber){ for (z = 0; z < 16 ; z++) { if(hikashopCheckOneTypeCreditCard(cardnumber,z)){ return true; } } alert(ccHikaErrors[ccErrorNo]); return false; } function hikashopCheckOneTypeCreditCard(cardnumber, cardType) { // Array to hold the permitted card characteristics var cards = new Array(); // Define the cards we support. You may add addtional card types as follows. // Name: As in the selection box of the form - must be same as user's // Length: List of possible valid lengths of the card number for the card // prefixes: List of possible prefixes for the card // checkdigit: Boolean to say whether there is a check digit cards [0] = {name: "Visa", length: "13,16", prefixes: "4", checkdigit: true}; cards [1] = {name: "MasterCard", length: "16", prefixes: "51,52,53,54,55", checkdigit: true}; cards [2] = {name: "DinersClub", length: "14,16", prefixes: "305,36,38,54,55", checkdigit: true}; cards [3] = {name: "CarteBlanche", length: "14", prefixes: "300,301,302,303,304,305", checkdigit: true}; cards [4] = {name: "AmEx", length: "15", prefixes: "34,37", checkdigit: true}; cards [5] = {name: "Discover", length: "16", prefixes: "6011,622,64,65", checkdigit: true}; cards [6] = {name: "JCB", length: "16", prefixes: "35", checkdigit: true}; cards [7] = {name: "enRoute", length: "15", prefixes: "2014,2149", checkdigit: false}; cards [8] = {name: "Solo", length: "16,18,19", prefixes: "6334,6767", checkdigit: true}; cards [9] = {name: "Switch", length: "16,18,19", prefixes: "4903,4905,4911,4936,564182,633110,6333,6759", checkdigit: true}; cards [10] = {name: "Maestro", length: "12,13,14,15,16,18,19", prefixes: "5018,5020,5038,6304,6759,6761", checkdigit: true}; cards [11] = {name: "VisaElectron", length: "16", prefixes: "417500,4917,4913,4508,4844", checkdigit: true}; cards [12] = {name: "LaserCard", length: "16,17,18,19", prefixes: "6304,6706,6771,6709", checkdigit: true}; cards [13] = {name: "UnionPay", length: "16,17,18,19", prefixes: "62", checkdigit: true}; cards [14] = {name: "Isracard", length: "8", prefixes: "0,1,2,3,4,5,6,7,8,9", checkdigit: false}; cards [15] = {name: "Direct", length: "9", prefixes: "0,1,2,3,4,5,6,7,8,9", checkdigit: false}; // Ensure that the user has provided a credit card number if (cardnumber.length == 0) { ccErrorNo = 3; return false; } // Now remove any spaces from the credit card number cardnumber = cardnumber.replace (/\s/g, ""); // Check that the number is numeric var cardNo = cardnumber var cardexp = /^[0-9]{8,19}$/; if (!cardexp.exec(cardNo)) { ccErrorNo = 3; return false; } // Now check the modulus 10 check digit - if required if (cards[cardType].checkdigit) { var checksum = 0; // running checksum total var mychar = ""; // next char to process var j = 1; // takes value of 1 or 2 // Process each digit one by one starting at the right var calc; for (i = cardNo.length - 1; i >= 0; i--) { // Extract the next digit and multiply by 1 or 2 on alternative digits. calc = Number(cardNo.charAt(i)) j; // If the result is in two digits add 1 to the checksum total if (calc > 9) { checksum = checksum + 1; calc = calc - 10; } // Add the units element to the checksum total checksum = checksum + calc; // Switch the value of j if (j ==1) {j = 2} else {j = 1}; } // All done - if checksum is divisible by 10, it is a valid modulus 10. // If not, report an error. if (checksum % 10 != 0) { ccErrorNo = 3; return false; } } // The following are the card-specific checks we undertake. var LengthValid = false; var PrefixValid = false; var undefined; // We use these for holding the valid lengths and prefixes of a card type var prefix = new Array (); var lengths = new Array (); // Load an array with the valid prefixes for this card prefix = cards[cardType].prefixes.split(","); // Now see if any of them match what we have in the card number for (i=0; i<prefix.length; i++) { var exp = new RegExp ("^" + prefix[i]); if (exp.test (cardNo)) PrefixValid = true; } // If it isn't a valid prefix there's no point at looking at the length if (!PrefixValid) { ccErrorNo = 3; return false; } // See if the length is valid for this card lengths = cards[cardType].length.split(","); for (j=0; j<lengths.length; j++) { if (cardNo.length == lengths[j]) LengthValid = true; } // See if all is OK by seeing if the length was valid. We only check the length if all else was // hunky dory. if (!LengthValid) { ccErrorNo = 3; return false; }; // The credit card is in the required format. return true; } /================================================================================================/

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