atk/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    Two little helpers, one to calculate an iBAN (international banking account number) for any bank account and one to verify its consistency.
Since iBAN numbers are generally too long to be calculated within JS, the modulo calculation is splitted.
If you need to use the iBAN calculator in older versions, of MSIE that lack the ability to address a string's characters like they were in an array, use the following (longer) version:
function(b,a,n,i){i=parseInt;return n+('0'+(98-((((""+b)%97+(""+a))%97)+""+i(n.charAt(0),36)+i(n.charAt(1),36)+"00")%97)).slice(-2)+b+a}


## annotated.js
// calculate iBAN from bank id, account number and nation code
function(
    b, // bank id
    a, // account number (padded to 10 chars)
    n, // nation code (e.g. "DE")
    i  // placeholder for parseInt
){
    i = parseInt;
    return n + // concatenate nation code, checksum, bank id and account number
        // calculate checksum (bank id, account number, country code base36 + '00') modulo 97
        // padded with 0 if necessary
        ('0' + (98 - (((("" + b) % 97 + ("" + a)) % 97) +
            "" + i(n[0], 36)+i(n[1], 36) + "00") % 97)).slice(-2) +
        b +
        a
}

// verify iBAN checksum
function(
    i, // iBAN string
    d  // placeholder for matches
){
    // match country code, checksum, bank id and account number
    return (d = /(\w)(\w)(..)(\d{8})(\d+)/.exec(i)) &&
        (i = parseInt, // store parseInt for smaller function
        // bank id + account + country code base 36 decoded + checksum % 97 must be 1
        // for every correct iBAN
        (d[4] % 97 + d[5]) % 97 + "" + i(d[1], 36) + i(d[2], 36) + d[3]) % 97 == 1
}

## index.js
function(b,a,n,i){i=parseInt;return n+('0'+(98-((((""+b)%97+(""+a))%97)+""+i(n[0],36)+i(n[1],36)+"00")%97)).slice(-2)+b+a}

function(i,d){return(d=/(\w)(\w)(..)(\d{8})(\d+)/.exec(i))&&(i=parseInt,(d[4]%97+d[5])%97+""+i(d[1],36)+i(d[2],36)+d[3])%97==1}

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2013 Alex Kloss <alexthkloss@web.de>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

## package.json
{
  "name": "iBAN tools",

  "description": "iBAN calculator / verification",

  "keywords": [
    "iBAN",
    "banking",
    "calculation",
    "checksum",
    "verification"
  ]
}

## test.html
<!DOCTYPE html>
<title>Foo</title>
<div>Expected value: <b>DE76700901000123456789, true</b></div>
<div>Actual value: <b id="ret"></b></div>
<script>
  // write a small example that shows off the API for your example
  // and tests it in one fell swoop.

  var iBAN = function(b,a,n,i){i=parseInt;return n+('0'+(98-((((""+b)%97+(""+a))%97)+""+i(n[0],36)+i(n[1],36)+"00")%97)).slice(-2)+b+a},
    isiBAN = function(i,d){return(d=/(\w)(\w)(..)(\d{8})(\d+)/.exec(i))&&(i=parseInt,(d[4]%97+d[5])%97+""+i(d[1],36)+i(d[2],36)+d[3])%97==1}

  document.getElementById( "ret" ).innerHTML = [iBAN('70090100','0123456789','DE'), isiBAN("DE76700901000123456789")].join(', ')
</script>
	// calculate iBAN from bank id, account number and nation code
	function(
	b, // bank id
	a, // account number (padded to 10 chars)
	n, // nation code (e.g. "DE")
	i // placeholder for parseInt
	){
	i = parseInt;
	return n + // concatenate nation code, checksum, bank id and account number
	// calculate checksum (bank id, account number, country code base36 + '00') modulo 97
	// padded with 0 if necessary
	('0' + (98 - (((("" + b) % 97 + ("" + a)) % 97) +
	"" + i(n[0], 36)+i(n[1], 36) + "00") % 97)).slice(-2) +
	b +
	a
	}

	// verify iBAN checksum
	function(
	i, // iBAN string
	d // placeholder for matches
	){
	// match country code, checksum, bank id and account number
	return (d = /(\w)(\w)(..)(\d{8})(\d+)/.exec(i)) &&
	(i = parseInt, // store parseInt for smaller function
	// bank id + account + country code base 36 decoded + checksum % 97 must be 1
	// for every correct iBAN
	(d[4] % 97 + d[5]) % 97 + "" + i(d[1], 36) + i(d[2], 36) + d[3]) % 97 == 1
	}
	function(b,a,n,i){i=parseInt;return n+('0'+(98-((((""+b)%97+(""+a))%97)+""+i(n[0],36)+i(n[1],36)+"00")%97)).slice(-2)+b+a}

	function(i,d){return(d=/(\w)(\w)(..)(\d{8})(\d+)/.exec(i))&&(i=parseInt,(d[4]%97+d[5])%97+""+i(d[1],36)+i(d[2],36)+d[3])%97==1}
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2013 Alex Kloss <alexthkloss@web.de>

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.
	{
	"name": "iBAN tools",

	"description": "iBAN calculator / verification",

	"keywords": [
	"iBAN",
	"banking",
	"calculation",
	"checksum",
	"verification"
	]
	}
	<!DOCTYPE html>
	<title>Foo</title>
	<div>Expected value: <b>DE76700901000123456789, true</b></div>
	<div>Actual value: <b id="ret"></b></div>
	<script>
	// write a small example that shows off the API for your example
	// and tests it in one fell swoop.

	var iBAN = function(b,a,n,i){i=parseInt;return n+('0'+(98-((((""+b)%97+(""+a))%97)+""+i(n[0],36)+i(n[1],36)+"00")%97)).slice(-2)+b+a},
	isiBAN = function(i,d){return(d=/(\w)(\w)(..)(\d{8})(\d+)/.exec(i))&&(i=parseInt,(d[4]%97+d[5])%97+""+i(d[1],36)+i(d[2],36)+d[3])%97==1}

	document.getElementById( "ret" ).innerHTML = [iBAN('70090100','0123456789','DE'), isiBAN("DE76700901000123456789")].join(', ')
	</script>