44 lines
1.5 KiB
Kotlin
44 lines
1.5 KiB
Kotlin
// version 1.0.6
|
|
|
|
import java.math.BigInteger
|
|
|
|
object IBAN {
|
|
/* List updated to release 73, January 2017, of IBAN Registry (75 countries) */
|
|
private const val countryCodes = "" +
|
|
"AD24 AE23 AL28 AT20 AZ28 BA20 BE16 BG22 BH22 BR29 " +
|
|
"BY28 CH21 CR22 CY28 CZ24 DE22 DK18 DO28 EE20 ES24 " +
|
|
"FI18 FO18 FR27 GB22 GE22 GI23 GL18 GR27 GT28 HR21 " +
|
|
"HU28 IE22 IL23 IQ23 IS26 IT27 JO30 KW30 KZ20 LB28 " +
|
|
"LC32 LI21 LT20 LU20 LV21 MC27 MD24 ME22 MK19 MR27 " +
|
|
"MT31 MU30 NL18 NO15 PK24 PL28 PS29 PT25 QA29 RO24 " +
|
|
"RS22 SA24 SC31 SE24 SI19 SK24 SM27 ST25 SV28 TL23 " +
|
|
"TN24 TR26 UA29 VG24 XK20"
|
|
|
|
fun isValid(iban: String): Boolean {
|
|
// remove spaces from IBAN
|
|
var s = iban.replace(" ", "")
|
|
|
|
// check country code and length
|
|
s.substring(0, 2) + s.length in countryCodes || return false
|
|
|
|
// move first 4 characters to the end
|
|
s = s.substring(4) + s.substring(0, 4)
|
|
|
|
// replace A to Z with numbers 10 To 35
|
|
s = s.replace(Regex("[A-Z]")) { (10 + (it.value[0] - 'A')).toString() }
|
|
|
|
// check whether mod 97 calculation gives a remainder of 1
|
|
return BigInteger(s) % BigInteger.valueOf(97L) == BigInteger.ONE
|
|
}
|
|
}
|
|
|
|
fun main() {
|
|
val ibans = arrayOf(
|
|
"GB82 WEST 1234 5698 7654 32",
|
|
"GB82 TEST 1234 5698 7654 32"
|
|
)
|
|
for (iban in ibans) {
|
|
val valid = IBAN.isValid(iban)
|
|
println(iban + if (valid) " may be valid" else " is not valid")
|
|
}
|
|
}
|