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/**
* DesfireProtocol.kt
*
* Copyright (C) 2011 Eric Butler
* Copyright (C) 2019 <seil0@mosad.xyz>
*
* Authors:
* Eric Butler <eric@codebutler.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.codebutler.farebot.card.desfire
import android.nfc.tech.IsoDep
import com.codebutler.farebot.Utils
import java.io.ByteArrayOutputStream
import java.io.IOException
import org.apache.commons.lang3.ArrayUtils
import kotlin.experimental.and
class DesfireProtocol(private val mTagTech: IsoDep) {
@Suppress("unused")
val manufacturingData: DesfireManufacturingData
@Throws(DesfireException::class)
get() {
val respBuffer = sendRequest(GET_MANUFACTURING_DATA)
if (respBuffer.size != 28)
throw DesfireException("Invalid response")
return DesfireManufacturingData(respBuffer)
}
@Suppress("unused")
val appList: IntArray
@Throws(DesfireException::class)
get() {
val appDirBuf = sendRequest(GET_APPLICATION_DIRECTORY)
val appIds = IntArray(appDirBuf.size / 3)
var app = 0
while (app < appDirBuf.size) {
val appId = ByteArray(3)
System.arraycopy(appDirBuf, app, appId, 0, 3)
appIds[app / 3] = Utils.byteArrayToInt(appId)
app += 3
}
return appIds
}
val fileList: IntArray
@Throws(DesfireException::class)
get() {
val buf = sendRequest(GET_FILES)
val fileIds = IntArray(buf.size)
for (x in buf.indices) {
fileIds[x] = buf[x].toInt()
}
return fileIds
}
@Throws(DesfireException::class)
fun selectApp(appId: Int) {
val appIdBuff = ByteArray(3)
appIdBuff[0] = (appId and 0xFF0000 shr 16).toByte()
appIdBuff[1] = (appId and 0xFF00 shr 8).toByte()
appIdBuff[2] = (appId and 0xFF).toByte()
sendRequest(SELECT_APPLICATION, appIdBuff)
}
@Throws(DesfireException::class)
fun getFileSettings(fileNo: Int): DesfireFileSettings {
val data = sendRequest(GET_FILE_SETTINGS, byteArrayOf(fileNo.toByte()))
return DesfireFileSettings.create(data)
}
@Suppress("unused")
@Throws(DesfireException::class)
fun readFile(fileNo: Int): ByteArray {
return sendRequest(
READ_DATA,
byteArrayOf(
fileNo.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte()
)
)
}
@Suppress("unused")
@Throws(DesfireException::class)
fun readRecord(fileNum: Int): ByteArray {
return sendRequest(
READ_RECORD,
byteArrayOf(
fileNum.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte(),
0x0.toByte()
)
)
}
@Throws(DesfireException::class)
fun readValue(fileNum: Int): Int {
val buf = sendRequest(READ_VALUE, byteArrayOf(fileNum.toByte()))
ArrayUtils.reverse(buf)
return Utils.byteArrayToInt(buf)
}
@Throws(DesfireException::class)
private fun sendRequest(command: Byte, parameters: ByteArray? = null): ByteArray {
val output = ByteArrayOutputStream()
var recvBuffer: ByteArray
try {
recvBuffer = mTagTech.transceive(wrapMessage(command, parameters))
} catch (e: IOException) {
throw DesfireException(e)
}
while (true) {
if (recvBuffer[recvBuffer.size - 2] != 0x91.toByte())
throw DesfireException("Invalid response")
output.write(recvBuffer, 0, recvBuffer.size - 2)
val status = recvBuffer[recvBuffer.size - 1]
if (status == OPERATION_OK) {
break
} else if (status == ADDITIONAL_FRAME) {
try {
recvBuffer = mTagTech.transceive(wrapMessage(GET_ADDITIONAL_FRAME, null))
} catch (e: IOException) {
throw DesfireException(e)
}
} else if (status == PERMISSION_DENIED) {
throw DesfireException("Permission denied")
} else {
throw DesfireException("Unknown status code: " + Integer.toHexString((status and 0xFF.toByte()).toInt()))
}
}
return output.toByteArray()
}
@Throws(DesfireException::class)
private fun wrapMessage(command: Byte, parameters: ByteArray?): ByteArray {
val stream = ByteArrayOutputStream()
stream.write(0x90.toByte().toInt())
stream.write(command.toInt())
stream.write(0x00.toByte().toInt())
stream.write(0x00.toByte().toInt())
if (parameters != null) {
stream.write(parameters.size.toByte().toInt())
try {
stream.write(parameters)
} catch (e: IOException) {
throw DesfireException(e)
}
}
stream.write(0x00.toByte().toInt())
return stream.toByteArray()
}
companion object {
/* Commands */
internal const val GET_MANUFACTURING_DATA = 0x60.toByte()
internal const val GET_APPLICATION_DIRECTORY = 0x6A.toByte()
internal const val GET_ADDITIONAL_FRAME = 0xAF.toByte()
internal const val SELECT_APPLICATION = 0x5A.toByte()
internal const val READ_DATA = 0xBD.toByte()
internal const val READ_RECORD = 0xBB.toByte()
internal const val READ_VALUE = 0x6C.toByte()
internal const val GET_FILES = 0x6F.toByte()
internal const val GET_FILE_SETTINGS = 0xF5.toByte()
/* Status codes */
internal const val OPERATION_OK = 0x00.toByte()
internal const val PERMISSION_DENIED = 0x9D.toByte()
internal const val ADDITIONAL_FRAME = 0xAF.toByte()
}
}

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