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fix: targeted voucher code not working

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This commit is contained in:
minjaesong
2025-02-15 23:56:53 +09:00
parent ad68e04b83
commit 37d6d3004b
4 changed files with 26 additions and 10 deletions
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14
src/net/torvald/terrarum/modulebasegame/redeemable/RedeemCodeMachine.kt
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@@ -106,7 +106,7 @@ object RedeemCodeMachine {
bytes[bytes.size - 1] = crc16.toByte()
val basePwd = initialPassword.random()
val basePwd = initialPassword.random().copyOf()
val receiverPwd = receiver?.toByteArray() ?: ByteArray(16) // 128 bits of something
// xor basePWD with receiverPwd
@@ -124,11 +124,19 @@ object RedeemCodeMachine {
fun decode(codeStr: String, decoderUUID: UUID? = null): RedeemVoucher? {
val receiverPwd = decoderUUID?.toByteArray() ?: ByteArray(16) // 128 bits of something
val passwords = initialPassword.map { basePwd ->
// for decrypting targeted code
val passwords1 = initialPassword.map { basePwd ->
ByteArray(32) { i ->
basePwd[i] xor receiverPwd[i % 16]
}
}
// for decrypting generic code
val passwords2 = initialPassword.map { basePwd ->
ByteArray(32) { i ->
basePwd[i]
}
}
val passwords = passwords1 + passwords2
// try to decode the input string by just trying all 8 possible keys
val decodeds = passwords.map {
@@ -149,7 +157,7 @@ object RedeemCodeMachine {
}
// if all CRC fails...
if (crcResults.none()) {
if (crcResults.indexOf(true) < 0) {
return null
}