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Removed now unused code from https://6xq.net/flickercodes/

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dankito 2019-10-30 22:11:38 +01:00 committed by dankito
parent 1a7342a03b
commit 4c5abde3b1
1 changed files with 0 additions and 68 deletions
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68
fints4javaLib/src/main/kotlin/net/dankito/fints/tan/FlickercodeDecoder.kt
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@ -1,7 +1,6 @@
package net.dankito.fints.tan package net.dankito.fints.tan
import java.util.regex.Pattern import java.util.regex.Pattern
import kotlin.math.floor
open class FlickercodeDecoder { open class FlickercodeDecoder {
@ -12,8 +11,6 @@ open class FlickercodeDecoder {
open fun decodeChallenge(challengeHHD_UC: String): Flickercode { open fun decodeChallenge(challengeHHD_UC: String): Flickercode {
var code = challengeHHD_UC.toUpperCase().replace ("[^a-fA-F0-9]", "")
val challengeLength = parseIntToHex(challengeHHD_UC.substring(0, 2)) val challengeLength = parseIntToHex(challengeHHD_UC.substring(0, 2))
val startCodeLengthByte = parseIntToHex(challengeHHD_UC.substring(2, 4)) val startCodeLengthByte = parseIntToHex(challengeHHD_UC.substring(2, 4))
@ -67,34 +64,6 @@ open class FlickercodeDecoder {
val parsedDataSet = dataWithoutChecksum + luhnChecksum + xorChecksumString val parsedDataSet = dataWithoutChecksum + luhnChecksum + xorChecksumString
/* length check: first byte */
val len = code.length / 2 - 1
code = toHex(len, 2) + code.substring(2)
/* luhn checksum */
val luhndata = getPayload(code)
var luhnsum = 0
var i = 0
while (i < luhndata.length) {
luhnsum += 1 * parseIntToHex(luhndata[i]) + quersumme(2 * parseIntToHex(luhndata[i + 1]))
i += 2
}
luhnsum = (10 - luhnsum % 10) % 10
code = code.substring(0, code.length - 2) + toHex(luhnsum, 1) + code.substring(code.length - 1)
/* xor checksum */
var xorsum = 0
i = 0
while (i < code.length - 2) {
xorsum = xorsum xor parseIntToHex(code[i])
i++
}
code = code.substring(0, code.length - 1) + toHex(xorsum, 1)
return Flickercode(challengeHHD_UC, parsedDataSet) return Flickercode(challengeHHD_UC, parsedDataSet)
} }
@ -167,43 +136,6 @@ open class FlickercodeDecoder {
return result return result
} }
fun quersumme(number: Int): Int {
var quersumme = 0
var temp = number
while (temp != 0) {
quersumme += temp % 10
temp = floor(temp / 10.0).toInt()
}
return quersumme
}
fun getPayload(code: String): String {
var i = 0
var payload = ""
var len = parseIntToHex(code.substring(0, 2))
i += 2
while (i < code.length-2) {
/* skip bcd identifier */
i += 1
/* parse length */
len = parseIntToHex(code.substring(i, i + 1))
i += 1
// i = 4
var endIndex = i + len * 2
if (endIndex > code.length) {
endIndex = code.length
}
payload += code.substring(i, endIndex)
i += len * 2
}
return payload
}
protected open fun parseIntToHex(char: Char): Int { protected open fun parseIntToHex(char: Char): Int {
return parseIntToHex(char.toString()) return parseIntToHex(char.toString())
} }