/* * Script Name: ccvalidate.js * Written By: Kevin King (Kevin@PrecisOnline.com) * for Precision Solutions, Inc. (http://www.PrecisOnline.com) * * Date: 28 Oct 2002 * * Description: This script validates the basic accuracy of a credit card * number. It expects the card type and card number to have * been entered/selected, and then the verifyCard function can * be called to verify the accuracy of the card number. * * This script does not ensure that the card is active, so it * is possible that while the card number is accurate, the card * itself may have been deactivated by the issuer (i.e. for lost * or stolen cards). * * THIS SOFTWARE IS PROVIDED AS-IS AND AUTHOR PROVIDES NO * WARRANTIES, EITHER EXPRESSED OR IMPLIED, REGARDING THE * APPLICABILITY OR FITNESS OF THIS SOFTWARE FOR ANY SPECIFIC * PURPOSE. * * By using this software, you implicitly warrant your use * will conform to normal legitimate business purposes. Author * is not responsible for, and will assist authorities in the * prosecution of, any use of this software that is in violation * of United States or international law. * ***************************************************************************** * Modifications ***************************************************************************** * Date..... Changed By..... Description of Change.......................... * 30 Jan 06 Kevin King Added Australian BankCard support per details * received from Paul Bronshteyn (thanks again, * Paul!). * 28 Jan 06 Kevin King Corrected Delta rules as identified by Paul * Bronshteyn (thanks Paul!). * 26 Jan 06 Kevin King Added checkCvc function to verify CVV/CID values. * 20 Jan 06 Kevin King Updated Maestro and Solo rules per * http://www.barclaycardmerchantservices.co.uk/existing_customers/operational/pdf/binranges.pdf * 16 Mar 05 Kevin King Updated to add Delta and Maestro card support. * 05 Apr 03 Kevin King Updated SWITCH card validation table. Added * support for validating SOLO cards. */ var cc_checksum; // Number: The calculated checksum for the card var cc_fail_reason; // Text: Explains the reason for the failure var cc_switch_startDateLength; // Number: Count of digits in start date or 0=no start date (Switch/SOLO) var cc_switch_issueLength; // Number: Count of digits in issue number or 0=no issue number (Switch/SOLO) var cc_cvc_length; // Number: Count of digits in CVV2 /* ***************************************************************************** * Verify the check digit ***************************************************************************** */ function checkCard(f, cardType, cardNbr, cardCvc, cardIssueNo, cardStartDate, nameOnCard, expiry_date) { //alert(cardType); //alert(cardNbr); //alert(cardCvc); switch(cardType.toUpperCase()) { case "AMERICAN EXPRESS" : cardType = "A"; break; case "DISCOVER" : cardType = "D"; break; case "DINERS CLUB" : cardType = "DC"; break; case "ENROUTE" : cardType = "E"; break; case "JCB" : cardType = "J"; break; case "MASTERCARD" : cardType = "M"; break; case "SWITCH" : cardType = "S"; break; case "SOLO" : cardType = "SO"; break; case "VISA" : cardType = "V"; break; case "MAESTRO" : cardType = "MA"; break; case "DELTA" : cardType = "DA"; break; case "AUSTRALIAN BANKCARD" : cardType = "AB"; break; } //alert(cardType); if(cardNbr != "") { if(verifyCard(cardType, cardNbr, cardCvc, cardIssueNo, cardStartDate, nameOnCard, expiry_date) == true) { if(checkName(nameOnCard) != true) { alert("The Name on Credit Card can not be left blank."); return false; } if(checkExpiration(expiry_date) != true) { alert("Your credit card has expired."); return false; } if(checkIssueNo(cardIssueNo) != true) { alert("Card issue number is invalid."); return false; } if(checkStartDate(cardType, cardIssueNo, cardStartDate) != true) { alert("Invalid Start Date. Please use the format mm/yyyy."); //f.cardStartDate.focus(); return false; } if(checkCvc(cardCvc) != true) { alert("Card CVV2 value is invalid."); return false; } return true; } else { return false; } } alert("Please enter a valid card number."); // Clear old values //f.cardNbr.value = ""; //f.cardCvc.value = ""; return(false); } function luhnCheck(cardNbr) { var result = true; var ndx = cardNbr.length - 1; var checkDigit = cardNbr.substr(ndx,1); var multiplier = 2; var accum = 0; while(ndx) { var cardCh = cardNbr.substr(ndx - 1,1); if(cardCh >= 0 && cardCh <= 9) { var thisValue = cardCh * multiplier; while(thisValue > 0) { accum += Math.floor(thisValue % 10); thisValue = Math.floor(thisValue / 10); } multiplier = (multiplier == 2 ? 1 : 2); } ndx--; } cc_checksum = ((10 - (accum % 10)) % 10); if(cc_checksum != checkDigit) result = false; return(result); } /* ***************************************************************************** * Verify the card number is all numbers ***************************************************************************** */ function checkDigits(cardNbr) { var result = true; var ndx; for(ndx = 0 ; ndx < cardNbr.length && result ; ++ndx) { var cardCh = cardNbr.substr(ndx,1); if(cardCh < '0' || cardCh > '9') result = false; } return(result); } /* ***************************************************************************** * Verify the prefix and length is proper for this type of card ***************************************************************************** */ function checkPrefixAndLength(cardType, cardNbr) { var result = false; /* Rules Legend 0 - hiPrefix 1 - loPrefix 2 - valLengths 3 - cvcLength 4 - issueLength 5 - startDateLength */ var amexRules = new Array("37,37,15,4","34,34,15,4"); var discRules = new Array("6011,6011,16,3"); var dinersRules = new Array("36,36,14","38,38,14","300,305,14"); var enrouteRules = new Array("2014,2014,15","2149,2149,15"); var jcbRules = new Array("3,3,16","2131,2131,15","1800,1800,15"); var mcRules = new Array("51,55,16,3"); var visaRules = new Array("4,4,13,3","4,4,16,3"); var switchRules = new Array("490302,490309,18,3,1","490335,490339,18,3,1","491101,491102,16,3,1", "491174,491182,18,3,1","493600,493699,19,3,1","564182,564182,16,3,2", "633300,633300,16,3,0","633301,633301,19,3,1","633302,633349,16,3,0", "675900,675900,16,3,0","675901,675901,19,3,1","675902,675904,16,3,0", "675905,675905,19,3,1","675906,675917,16,3,0","675918,675918,19,3,1", "675919,675937,16,3,0","675938,675940,18,3,1","675941,675949,16,3,0", "675950,675962,19,3,1","675963,675997,16,3,0","675998,675998,19,3,1", "675999,675999,16,3,0"); var soloRules = new Array("633450,633453,16,3,0","633454,633457,16,3,0","633458,633460,16,3,0", "633461,633461,18,3,1","633462,633472,16,3,0","633473,633473,18,3,1", "633474,633475,16,3,0","633476,633476,19,3,1","633477,633477,16,3,0", "633478,633478,18,3,1","633479,633480,16,3,0","633481,633481,19,3,1", "633482,633489,16,3,0","633490,633493,16,3,1","633494,633494,18,3,1", "633495,633497,16,3,2","633498,633498,19,3,1","633499,633499,18,3,1", "676700,676700,16,3,0","676701,676701,19,3,1","676702,676702,16,3,0", "676703,676703,18,3,1","676704,676704,16,3,0","676705,676705,19,3,1", "676706,676707,16,3,2","676708,676711,16,3,0","676712,676715,16,3,0", "676716,676717,16,3,0","676718,676718,19,3,1","676719,676739,16,3,0", "676740,676740,18,3,1","676741,676749,16,3,0","676750,676762,19,3,1", "676763,676769,16,3,0","676770,676770,19,3,1","676771,676773,16,3,0", "676774,676774,18,3,1","676775,676778,16,3,0","676779,676779,18,3,1", "676780,676781,16,3,0","676782,676782,18,3,1","676783,676794,16,3,0", "676795,676795,18,3,1","676796,676797,16,3,0","676798,676798,19,3,1", "676799,676799,16,3,0"); var maestroRules = new Array("490303,490303,16/18/19,3,,7","493698,493699,16/18/19,3,,7","633302,633349,16/18/19,3,,7", "675900,675999,16/18/19,3,,7"); var deltaRules = new Array("413733,413737,16","446200,446299,16","453978,453979,16", "454313,454313,16","454432,454435,16","454742,454742,16", "456725,456745,16","465830,465879,16","465901,465950,16", "484409,484410,16","490960,490979,16","492181,492182,16", "498824,498824,16"); var abcRules = new Array("560,651,16"); var thisRules; switch(cardType) { case "A" : thisRules = amexRules; break; case "D" : thisRules = discRules; break; case "DC" : thisRules = dinersRules; break; case "E" : thisRules = enrouteRules; break; case "J" : thisRules = jcbRules; break; case "M" : thisRules = mcRules; break; case "S" : thisRules = switchRules; break; case "SO" : thisRules = soloRules; break; case "V" : thisRules = visaRules; break; case "MA" : thisRules = maestroRules; break; case "DA" : thisRules = deltaRules; break; case "AB" : thisRules = abcRules; break; default : thisRules = new Array(); break; } var ndx; var ruleDetails; for(ndx = 0 ; ndx < thisRules.length && !result ; ++ndx) { thisRule = thisRules[ndx]; ruleDetails = thisRule.split(","); var hiPrefix = ruleDetails[0]; var loPrefix = ruleDetails[1]; var valLengths = ruleDetails[2].split("/"); var cvcLength = ruleDetails[3] var issueLength = ruleDetails[4]; var startDateLength = ruleDetails[5]; /* * Verify card number length */ var cardPrefix = cardNbr.substr(0,hiPrefix.length); if(cardPrefix >= hiPrefix && cardPrefix <= loPrefix) { if(valLengths[0] != 0) { result = false; for(lengthNdx = 0 ; lengthNdx < valLengths.length && !result ; ++lengthNdx) { if(cardNbr.length == valLengths[lengthNdx]) { result = true; } } } else { result = true; } if(result) { cc_switch_startDateLength = startDateLength; cc_switch_issueLength = issueLength; cc_cvc_length = cvcLength; //alert("start date length: " + cc_switch_startDateLength); //alert("issue no length: " + cc_switch_issueLength); //alert("cvv length: " + cc_cvc_length); } } } return(result); } /* ***************************************************************************** * Returns the name of the card type (for errors) ***************************************************************************** */ function cardTypeName(cardType) { var result; switch(cardType) { case "A" : result = "American Express"; break; case "D" : result = "Discover"; break; case "DC": result = "Diners Club"; break; case "E" : result = "Enroute" break; case "J" : result = "JCB"; break; case "M" : result = "MasterCard"; break; case "S" : result = "Switch"; break; case "SO": result = "SOLO"; break; case "V" : result = "Visa"; break; case "MA": result = "Maestro"; break; case "DA": result = "Delta"; break; case "AB": result = "Australian BankCard"; break; default : result = "unknown"; break; } return(result); } /* ***************************************************************************** * Validate name on card ***************************************************************************** */ function checkName(nameonCard) { var result = (nameonCard.length != 0); return(result); } /* ***************************************************************************** * Validate card expiration date ***************************************************************************** */ function checkExpiration(expiry_date) { var result = true; //alert("expiration date: " + expiry_date + " current date: " + new Date()); var now = new Date(); expiry_date.setMonth(expiry_date.getMonth()+1); if (expiry_date.getTime() < now.getTime()) { result = false; } return(result); } /* ***************************************************************************** * Validate card Issue No ***************************************************************************** */ function checkIssueNo(cardIssueNo) { var result = true; if(cc_switch_issueLength > 0) { result = (cardIssueNo.length == cc_switch_issueLength); } return(result); } /* ***************************************************************************** * Validate card Start Date ***************************************************************************** */ function checkStartDate(cardType, cardIssueNo, cardStartDate) { var result = true; if(cc_switch_startDateLength > 0) { if (cardStartDate.length != cc_switch_startDateLength) { result = false; } else { if (cardStartDate.substring(2,3) != "/" || isNaN(cardStartDate.substring(0,2)) == true || isNaN(cardStartDate.substring(cardStartDate.length-4,cardStartDate.length)) == true) { result = false; } } } else { if (cardType == "S" || cardType == "SO" || cardType == "MA") { if (cardIssueNo.length == 0 && cardStartDate.length == 0) { result = false; } } } return(result); } /* ***************************************************************************** * Validate card verification code (CVV2/CID) ***************************************************************************** */ function checkCvc(cardCvc) { var result = true; if(cc_cvc_length > 0) { result = (cardCvc.length == cc_cvc_length); } return(result); } /* ***************************************************************************** * Verify the card number ***************************************************************************** * Incoming Parameters: * cardType: A - American Express * AB - Australian BankCard * D - Discover * DA - Delta * DC - Diners Club * E - Enroute * J - JCB * M - MasterCard * MA - Maestro * S - Switch * SO - SOLO * V - VISA * cardNbr: Numeric card number, appropriate length determined by card * type/prefix. * */ function verifyCard(cardType,cardNbr) { var result = true; if(cardNbr != "") { result = checkDigits(cardNbr); if(result == true) { result = checkPrefixAndLength(cardType,cardNbr); if(result == true) { result = luhnCheck(cardNbr); if(result == false) { cc_fail_reason = "Incorrect checksum"; } } else { cc_fail_reason = "Card length or type is incorrect"; } } else { cc_fail_reason = "Card number must be fully numeric"; } if (result == false) { alert("The " + cardTypeName(cardType) + " card number entered is incorrect!"); } } else result = false; return(result); }