IBAN 验证检查

IT技术 javascript iban
2021-02-23 19:59:15

我需要使用 JavaScript 进行 IBAN 验证检查。我需要遵循的规则是：

验证 IBAN 通过将 IBAN 转换为整数并对其执行基本的 mod-97 操作（如 ISO 7064 中所述）来验证 IBAN。如果 IBAN 有效，则余数等于 1。

  1. 检查 IBAN 总长度是否符合国家/地区。如果不是，则IBAN无效

  2. 将四个初始字符移动到字符串的末尾

  3. 将字符串中的每个字母替换为两位数字，从而扩展字符串，其中 A = 10, B = 11, ..., Z = 35

  4. 将字符串解释为十进制整数并计算该数字除以 97 的余数

我正在为白俄罗斯 IBAN 执行此操作，因此它必须遵循以下格式

2C 31N -

RU1230000000000000000000000000000

我如何修改以下内容以满足上述规则；

function validateIBAN(iban) {
  var newIban = iban.toUpperCase(),
    modulo = function(divident, divisor) {
      var cDivident = '';
      var cRest = '';

      for (var i in divident) {
        var cChar = divident[i];
        var cOperator = cRest + '' + cDivident + '' + cChar;

        if (cOperator < parseInt(divisor)) {
          cDivident += '' + cChar;
        } else {
          cRest = cOperator % divisor;
          if (cRest == 0) {
            cRest = '';
          }
          cDivident = '';
        }

      }
      cRest += '' + cDivident;
      if (cRest == '') {
        cRest = 0;
      }
      return cRest;
    };

  if (newIban.search(/^[A-Z]{2}/gi) < 0) {
    return false;
  }

  newIban = newIban.substring(4) + newIban.substring(0, 4);

  newIban = newIban.replace(/[A-Z]/g, function(match) {
    return match.charCodeAt(0) - 55;
  });

  return parseInt(modulo(newIban, 97), 10) === 1;
}


console.log(validateIBAN("RU1230000000000000000000000000000"));

6个回答

基于http://toms-cafe.de/iban/iban.js的工作，我开发了我的 IBAN 检查版本。

您可以通过修改变量来修改国家支持CODE_LENGTHS。

这是我的实现：

function alertValidIBAN(iban) {
    alert(isValidIBANNumber(iban));
}

/*
 * Returns 1 if the IBAN is valid 
 * Returns FALSE if the IBAN's length is not as should be (for CY the IBAN Should be 28 chars long starting with CY )
 * Returns any other number (checksum) when the IBAN is invalid (check digits do not match)
 */
function isValidIBANNumber(input) {
    var CODE_LENGTHS = {
        AD: 24, AE: 23, AT: 20, AZ: 28, BA: 20, BE: 16, BG: 22, BH: 22, BR: 29,
        CH: 21, CR: 21, CY: 28, CZ: 24, DE: 22, DK: 18, DO: 28, EE: 20, ES: 24,
        FI: 18, FO: 18, FR: 27, GB: 22, GI: 23, GL: 18, GR: 27, GT: 28, HR: 21,
        HU: 28, IE: 22, IL: 23, IS: 26, IT: 27, JO: 30, KW: 30, KZ: 20, LB: 28,
        LI: 21, LT: 20, LU: 20, LV: 21, MC: 27, MD: 24, ME: 22, MK: 19, MR: 27,
        MT: 31, MU: 30, NL: 18, NO: 15, PK: 24, PL: 28, PS: 29, PT: 25, QA: 29,
        RO: 24, RS: 22, SA: 24, SE: 24, SI: 19, SK: 24, SM: 27, TN: 24, TR: 26,   
        AL: 28, BY: 28, CR: 22, EG: 29, GE: 22, IQ: 23, LC: 32, SC: 31, ST: 25,
        SV: 28, TL: 23, UA: 29, VA: 22, VG: 24, XK: 20
    };
    var iban = String(input).toUpperCase().replace(/[^A-Z0-9]/g, ''), // keep only alphanumeric characters
            code = iban.match(/^([A-Z]{2})(\d{2})([A-Z\d]+)$/), // match and capture (1) the country code, (2) the check digits, and (3) the rest
            digits;
    // check syntax and length
    if (!code || iban.length !== CODE_LENGTHS[code[1]]) {
        return false;
    }
    // rearrange country code and check digits, and convert chars to ints
    digits = (code[3] + code[1] + code[2]).replace(/[A-Z]/g, function (letter) {
        return letter.charCodeAt(0) - 55;
    });
    // final check
    return mod97(digits);
}

function mod97(string) {
    var checksum = string.slice(0, 2), fragment;
    for (var offset = 2; offset < string.length; offset += 7) {
        fragment = String(checksum) + string.substring(offset, offset + 7);
        checksum = parseInt(fragment, 10) % 97;
    }
    return checksum;
}
input { width:300px; }
Enter IBAN 
<input type="test" id="iban"/>
<button onclick="alertValidIBAN(null);">check IBAN</button>

@Ismaestro 不，它返回“55”-> 根据描述“当 IBAN 无效时返回任何其他数字（校验和）”
2021-04-21 19:59:15
用真实账户检查sniippet，没有正确运行。使用 github.com/arhs/iban.js解决方案
2021-04-21 19:59:15
似乎工作得很好。添加了更多国家/地区代码，因为它是一种验证方法，我想它应该返回布尔值而不是校验和值。所以我也把回报改成了return mod97(digits) === 1;
2021-04-24 19:59:15
CR 是 22，而不是 21（假定为哥斯达黎加）
2021-04-29 19:59:15
在“CODE_LENGTHS”列表中两次提到“CR”是否正确？见第 2 和第 3 栏。
2021-05-08 19:59:15

您可以使用此库来验证和格式化 IBAN：https : //github.com/arhs/iban.js（免责声明：我编写了该库）

但是，既不支持俄罗斯也不支持白俄罗斯，因为我在维基百科的IBAN 页面或官方 IBAN 注册表中都找不到这些国家/地区的任何提及，所以恐怕您必须自己修改库代码才能添加它.

谢谢@armen。Issue open ( github.com/arhs/iban.js/issues/23 ) 将很快修复它。
2021-04-29 19:59:15
此代码无法验证摩尔多瓦 IBAN。例如MD75EX0900002374642125EU。根据 www.iban.com 它是有效的
2021-05-07 19:59:15
@armen 您可以订阅 github 问题通知。我也会来更新这个 SO 线程。
2021-05-08 19:59:15
非常好的@Laurent VB，在此修复后是否有任何邮件列表通知我？
2021-05-19 19:59:15

我回答了一个类似的问题。使用此正则表达式列表来验证您的 IBANS。有 70 个国家/地区，因此总的来说，您应该很高兴前往。

AL[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){2}([a-zA-Z0-9]{4}\s?){4}\s?
AD[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){2}([a-zA-Z0-9]{4}\s?){3}\s?
AT[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}\s?
AZ[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{4}\s?){1}([0-9]{4}\s?){5}\s?
BH[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([a-zA-Z0-9]{4}\s?){3}([a-zA-Z0-9]{2})\s?
BY[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{4}\s?){1}([0-9]{4}\s?){5}\s?
BE[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){3}\s?
BA[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}\s?
BR[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}([0-9]{3})([a-zA-Z]{1}\s?)([a-zA-Z0-9]{1})\s?
BG[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([0-9]{4}\s?){1}([0-9]{2})([a-zA-Z0-9]{2}\s?)([a-zA-Z0-9]{4}\s?){1}([a-zA-Z0-9]{2})\s?
CR[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}([0-9]{2})\s?
HR[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}([0-9]{1})\s?
CY[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){2}([a-zA-Z0-9]{4}\s?){4}\s?
CZ[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}\s?
DK[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){3}([0-9]{2})\s?
DO[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([0-9]{4}\s?){5}\s?
TL[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}([0-9]{3})\s?
EE[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}\s?
FO[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){3}([0-9]{2})\s?
FI[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){3}([0-9]{2})\s?
FR[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){2}([0-9]{2})([a-zA-Z0-9]{2}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{1})([0-9]{2})\s?
GE[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{2})([0-9]{2}\s?)([0-9]{4}\s?){3}([0-9]{2})\s?
DE[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}([0-9]{2})\s?
GI[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([a-zA-Z0-9]{4}\s?){3}([a-zA-Z0-9]{3})\s?
GR[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){1}([0-9]{3})([a-zA-Z0-9]{1}\s?)([a-zA-Z0-9]{4}\s?){3}([a-zA-Z0-9]{3})\s?
GL[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){3}([0-9]{2})\s?
GT[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{4}\s?){1}([a-zA-Z0-9]{4}\s?){5}\s?
HU[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){6}\s?
IS[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}([0-9]{2})\s?
IE[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{4}\s?){1}([0-9]{4}\s?){3}([0-9]{2})\s?
IL[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}([0-9]{3})\s?
IT[a-zA-Z0-9]{2}\s?([a-zA-Z]{1})([0-9]{3}\s?)([0-9]{4}\s?){1}([0-9]{3})([a-zA-Z0-9]{1}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{3})\s?
JO[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([0-9]{4}\s?){5}([0-9]{2})\s?
KZ[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){3}([0-9]{1})([a-zA-Z0-9]{3}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{2})\s?
XK[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){1}([0-9]{4}\s?){2}([0-9]{2})([0-9]{2}\s?)\s?
KW[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([a-zA-Z0-9]{4}\s?){5}([a-zA-Z0-9]{2})\s?
LV[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([a-zA-Z0-9]{4}\s?){3}([a-zA-Z0-9]{1})\s?
LB[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){1}([a-zA-Z0-9]{4}\s?){5}\s?
LI[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){1}([0-9]{1})([a-zA-Z0-9]{3}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{1})\s?
LT[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}\s?
LU[a-zA-Z0-9]{2}\s?([0-9]{3})([a-zA-Z0-9]{1}\s?)([a-zA-Z0-9]{4}\s?){3}\s?
MK[a-zA-Z0-9]{2}\s?([0-9]{3})([a-zA-Z0-9]{1}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{1})([0-9]{2})\s?
MT[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([0-9]{4}\s?){1}([0-9]{1})([a-zA-Z0-9]{3}\s?)([a-zA-Z0-9]{4}\s?){3}([a-zA-Z0-9]{3})\s?
MR[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}([0-9]{3})\s?
MU[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([0-9]{4}\s?){4}([0-9]{3})([a-zA-Z]{1}\s?)([a-zA-Z]{2})\s?
MC[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){2}([0-9]{2})([a-zA-Z0-9]{2}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{1})([0-9]{2})\s?
MD[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{2})([a-zA-Z0-9]{2}\s?)([a-zA-Z0-9]{4}\s?){4}\s?
ME[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}([0-9]{2})\s?
NL[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([0-9]{4}\s?){2}([0-9]{2})\s?
NO[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){2}([0-9]{3})\s?
PK[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{4}\s?){1}([0-9]{4}\s?){4}\s?
PS[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{4}\s?){1}([0-9]{4}\s?){5}([0-9]{1})\s?
PL[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){6}\s?
PT[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}([0-9]{1})\s?
QA[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([a-zA-Z0-9]{4}\s?){5}([a-zA-Z0-9]{1})\s?
RO[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([a-zA-Z0-9]{4}\s?){4}\s?
SM[a-zA-Z0-9]{2}\s?([a-zA-Z]{1})([0-9]{3}\s?)([0-9]{4}\s?){1}([0-9]{3})([a-zA-Z0-9]{1}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{3})\s?
SA[a-zA-Z0-9]{2}\s?([0-9]{2})([a-zA-Z0-9]{2}\s?)([a-zA-Z0-9]{4}\s?){4}\s?
RS[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){4}([0-9]{2})\s?
SK[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}\s?
SI[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){3}([0-9]{3})\s?
ES[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}\s?
SE[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}\s?
CH[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){1}([0-9]{1})([a-zA-Z0-9]{3}\s?)([a-zA-Z0-9]{4}\s?){2}([a-zA-Z0-9]{1})\s?
TN[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){5}\s?
TR[a-zA-Z0-9]{2}\s?([0-9]{4}\s?){1}([0-9]{1})([a-zA-Z0-9]{3}\s?)([a-zA-Z0-9]{4}\s?){3}([a-zA-Z0-9]{2})\s?
AE[a-zA-Z0-9]{2}\s?([0-9]{3})([0-9]{1}\s?)([0-9]{4}\s?){3}([0-9]{3})\s?
GB[a-zA-Z0-9]{2}\s?([a-zA-Z]{4}\s?){1}([0-9]{4}\s?){3}([0-9]{2})\s?
VA[a-zA-Z0-9]{2}\s?([0-9]{3})([0-9]{1}\s?)([0-9]{4}\s?){3}([0-9]{2})\s?
VG[a-zA-Z0-9]{2}\s?([a-zA-Z0-9]{4}\s?){1}([0-9]{4}\s?){4}\s?
需要明确的是：它不仅影响 AL，它影响所有 IBAN。您引用的维基百科说 IBAN 由 ob 2 个字母的国家代码组成，后跟 2 个（校验）数字（始终是数字），然后是最多 30 个特定于国家/地区的字母数字字符。所以第一个块“[a-zA-Z0-9]”应该总是“[0-9]”
2021-04-21 19:59:15
哦非常感谢。你是对的，我的 B。我在我的 AL IBAN 测试中添加了“c”而不是“n”，所以根据维基百科：en.wikipedia.org/wiki/International_Bank_Account_Number它应该是 8 n ,16c。
2021-04-26 19:59:15
赞成，因为我发现它很有用，但似乎根本不正确：我认为在前两个字符之后总是应该跟随 2 位数字。所以而不是例如AL[a-zA-Z0-9]{2}它应该是AL[0-9]{2}对的！？
2021-05-02 19:59:15
赞成，因为我需要一个国家的正则表达式，而不是通用的。
2021-05-05 19:59:15
该列表包含 70 个国家/地区的 IBAN 正则表达式。IBAN 易于测试。3 次投票是否意味着这些 IBAN 没有用？
2021-05-13 19:59:15

基于以前的答案，我创建了一个Directive实现 AngularValidator方法的方法。
我还添加了类型。

iban-validator.directive.ts

import { Validator, AbstractControl, NG_VALIDATORS } from '@angular/forms';
import { Directive } from '@angular/core';

@Directive({
  selector: '[ibanValidators]',
  providers: [{
    provide: NG_VALIDATORS,
    useExisting: IbanValidatorDirective,
    multi: true
  }]
})

export class IbanValidatorDirective implements Validator {

  validate(control: AbstractControl): object {
    const codeLengths = {
      AD: 24, AE: 23, AL: 28, AT: 20, AZ: 28, BA: 20, BE: 16, BG: 22, BH: 22, BR: 29, CH: 21, CR: 21, CY: 28, CZ: 24,
      DE: 22, DK: 18, DO: 28, EE: 20, ES: 24, LC: 30, FI: 18, FO: 18, FR: 27, GB: 22, GI: 23, GL: 18, GR: 27, GT: 28,
      HR: 21, HU: 28, IE: 22, IL: 23, IS: 26, IT: 27, JO: 30, KW: 30, KZ: 20, LB: 28, LI: 21, LT: 20, LU: 20, LV: 21,
      MC: 27, MD: 24, ME: 22, MK: 19, MR: 27, MT: 31, MU: 30, NL: 18, NO: 15, PK: 24, PL: 28, PS: 29, PT: 25, QA: 29,
      RO: 24, RS: 22, SA: 24, SE: 24, SI: 19, SK: 24, SM: 27, TN: 24, TR: 26
    };
    if (control.value) {
      const iban = control.value.toUpperCase().replace(/[^A-Z0-9]/g, '');
      const code = iban.match(/^([A-Z]{2})(\d{2})([A-Z\d]+)$/);
      let digits: number;
      if (!code || iban.length !== codeLengths[code[1]]) {
        return { ibanValid: false };
      }
      digits = (code[3] + code[1] + code[2]).replace(/[A-Z]/g, (letter: string) => {
        return letter.charCodeAt(0) - 55;
      });
      return this.mod97(digits) === 1 ? null : { ibanValid: false };
    }
  }

  private mod97(digital: number | string) {
    digital = digital.toString();
    let checksum: number | string = digital.slice(0, 2);
    let fragment = '';
    for (let offset = 2; offset < digital.length; offset += 7) {
      fragment = checksum + digital.substring(offset, offset + 7);
      checksum = parseInt(fragment, 10) % 97;
    }
    return checksum;
  }
}

然后只需在输入上使用指令。

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