ccfile in xml

app/src/main/java/fr/ar2000/ndefemulator/CCFile.kt

@@ -0,0 +1,32 @@
+package fr.ar2000.ndefemulator
+
+import android.util.Log
+import java.util.LinkedList
+
+data class CCFile(var cclen: Int = 0,var t4tVno: Int = 0,var mle: Int = 0,var mlc: Int = 0, var tlv: ByteArray = ByteArray(1)) {
+     fun toByteArray():ByteArray {
+        val arr = LinkedList<Byte>()
+        cclen.toByteArray(2).forEach { arr.add(it) }
+        t4tVno.toByteArray(1).forEach { arr.add(it) }
+        mle.toByteArray(2).forEach { arr.add(it) }
+        mlc.toByteArray(2).forEach { arr.add(it) }
+        tlv.forEach { arr.add(it) }
+        if(arr.size != cclen) {
+            Log.w("CCFile.kt","Incoherent CCLEN")
+        }
+        return arr.toByteArray()
+    }
+}
+
+@OptIn(ExperimentalStdlibApi::class)
+private fun Int.toByteArray(len: Int=1):ByteArray {
+    var str = toHexString(HexFormat.UpperCase).drop(2)
+    str = str.padStart(len*2,'0').takeLast(len*2)
+    val res = ByteArray(len)
+    var i = 0
+    str.chunked(2).forEach {
+        res[i] = Integer.decode("0x$it").toByte()
+        i++
+    }
+    return res
+}

app/src/main/java/fr/ar2000/ndefemulator/MyHostApduService.kt

@@ -6,13 +6,13 @@ import android.nfc.NdefRecord
 import android.nfc.cardemulation.HostApduService
 import android.os.Bundle
 import android.util.Log
+import org.xmlpull.v1.XmlPullParser
 import java.io.UnsupportedEncodingException
 import java.math.BigInteger
 import java.util.*
+import kotlin.collections.HashMap
+import kotlin.collections.LinkedHashMap
 
-/**
- * Created by Qifan on 05/12/2018.
- */
 
 class MyHostApduService : HostApduService() {
 
@@ -64,7 +64,7 @@ class MyHostApduService : HostApduService() {
         0x04.toByte(), // T field of the NDEF File Control TLV
         0x06.toByte(), // L field of the NDEF File Control TLV
         0xE1.toByte(), 0x04.toByte(), // File Identifier of NDEF file
-        0xFF.toByte(), 0xFE.toByte(), // Maximum NDEF file size of 65534 bytes
+        0x08.toByte(), 0x00.toByte(), // Maximum NDEF file size of 65534 bytes
         0x00.toByte(), // Read access without any security
         0xFF.toByte(), // Write access without any security
         0x90.toByte(), 0x00.toByte(), // A_OKAY
@@ -135,6 +135,17 @@ class MyHostApduService : HostApduService() {
         // in the NFC Forum specification
         //
         Log.i(TAG, "processCommandApdu() | incoming commandApdu: " + commandApdu.toHex())
+        val ApduDissect = HashMap<String,String>()
+        ApduDissect["CLA"] = commandApdu.copyOfRange(0,1).toHex()
+        ApduDissect["INS"] = commandApdu.copyOfRange(1,2).toHex()
+        ApduDissect["P1"] = commandApdu.copyOfRange(2,3).toHex()
+        ApduDissect["P2"] = commandApdu.copyOfRange(3,4).toHex()
+        if(commandApdu.size > 5) {
+            ApduDissect["Lc"] = commandApdu.copyOfRange(4, 5).toHex()
+            ApduDissect["Data"] = commandApdu.copyOfRange(5, 5 + commandApdu[4].toInt()).toHex()
+        }
+        ApduDissect["Le"] = commandApdu.copyOfRange(commandApdu.size-1,commandApdu.size).toHex()
+        Log.i(TAG,ApduDissect.toString())
 
         //
         // First command: NDEF Tag Application select (Section 5.5.2 in NFC Forum spec)
@@ -157,12 +168,54 @@ class MyHostApduService : HostApduService() {
         //
         if (READ_CAPABILITY_CONTAINER.contentEquals(commandApdu) && !READ_CAPABILITY_CONTAINER_CHECK
         ) {
-            Log.i(
-                TAG,
-                "READ_CAPABILITY_CONTAINER triggered. Our Response: " + READ_CAPABILITY_CONTAINER_RESPONSE.toHex(),
-            )
+            Log.i(TAG, "READ_CAPABILITY_CONTAINER triggered. Our Response: " + READ_CAPABILITY_CONTAINER_RESPONSE.toHex(),)
             READ_CAPABILITY_CONTAINER_CHECK = true
-            return READ_CAPABILITY_CONTAINER_RESPONSE
+            val xrp = resources.getXml(R.xml.ccfile)
+            val parentTag = Stack<String>()
+            var currentTag = ""
+            val ccFile = CCFile()
+            val ccHashMap = LinkedHashMap<String,String>()
+            while(xrp.eventType != XmlPullParser.END_DOCUMENT) {
+                when (xrp.eventType) {
+                    XmlPullParser.START_TAG -> {
+                        parentTag.push(currentTag)
+                        currentTag = xrp.name
+                    }
+                    XmlPullParser.TEXT -> {
+                        ccHashMap[currentTag] = xrp.text
+                    }
+                    XmlPullParser.END_TAG -> currentTag = parentTag.pop()
+                    XmlPullParser.END_DOCUMENT -> {
+                        xrp.close()
+                        break
+                    }
+                }
+                xrp.next()
+            }
+
+            ccFile.cclen = Integer.decode(ccHashMap["CCLEN"] ?: "0x00")
+            ccFile.t4tVno = Integer.decode(ccHashMap["T4T_VNo"] ?: "0x00")
+            ccFile.mle = Integer.decode(ccHashMap["MLe"] ?: "0x00")
+            ccFile.mlc = Integer.decode(ccHashMap["MLc"] ?: "0x00")
+            var tlv = ccHashMap["T"]?.drop(2)?:"00"
+            tlv += ccHashMap["L"]?.drop(2)?:"00"
+            tlv += ccHashMap["NDEF_FILE_ID"]?.drop(2) ?: "0000"
+            tlv += ccHashMap["NDEF_FILE_SIZE"]?.drop(2) ?: "0000"
+            tlv += ccHashMap["ENDEF_File_READ_AC"]?.drop(2) ?: "00"
+            tlv += ccHashMap["ENDEF_File_WRITE_AC"]?.drop(2) ?: "00"
+            val tlvByteList = LinkedList<Byte>()
+            tlv.chunked(2).forEach {
+                tlvByteList.add(Integer.decode("0x$it").toByte())
+            }
+            ccFile.tlv = tlvByteList.toByteArray()
+
+            val t = ccFile.toByteArray()
+
+            //return READ_CAPABILITY_CONTAINER_RESPONSE
+            val msg = ByteArray(t.size+2)
+            t.copyInto(msg)
+            msg[t.size] = 0x90.toByte()
+            return msg
         }
 
         //

app/src/main/res/values/const.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="NDEF_AID">D2760000850101</string>
+</resources>

app/src/main/res/xml-v31/apduservice.xml

@@ -3,8 +3,7 @@
     android:description="@string/servicedesc"
     android:requireDeviceUnlock="false"
     android:requireDeviceScreenOn="false">
-    <aid-group android:description="@string/aiddescription"
-        android:category="other">
-        <aid-filter android:name="D2760000850101" />
+    <aid-group android:description="@string/aiddescription" android:category="other">
+        <aid-filter android:name="@string/NDEF_AID" />
     </aid-group>
 </host-apdu-service>

app/src/main/res/xml/ccfile.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--4.4-->
+<CapabilityContainerFile>
+    <!--Indicates the size of this CC (including this field).-->
+    <CCLEN>0x000F</CCLEN>
+    <!--Indicates the Mapping Version that is implemented on the T4T (see Section 4.5). Section 4.3.2 defines how the Reader/Writer needs to handle different Mapping Versions.-->
+    <T4T_VNo>0x20</T4T_VNo>
+    <!--Defines the maximum data size that can be read from the T4T using a single READ_BINARY Command.-->
+    <MLe>0xFFFF</MLe>
+    <!--Defines the maximum data size that can be sent to the T4T using a single Command.-->
+    <MLc>0xFFFF</MLc>
+    <!--Section 4.7.3 specifies the content of the NDEF-File_Ctrl_TLV block that contains information to control and manage the NDEF File for Mapping Version 2.0 (see Section 4.5).-->
+    <NDEF-File_Ctrl_TLV>
+        <T>0x04</T>
+        <L>0x06</L>
+        <V>
+            <NDEF_FILE_ID>0xE104</NDEF_FILE_ID>
+            <NDEF_FILE_SIZE>0x0800</NDEF_FILE_SIZE>
+            <ENDEF_File_READ_AC>0x00</ENDEF_File_READ_AC>
+            <ENDEF_File_WRITE_AC>0xFF</ENDEF_File_WRITE_AC>
+        </V>
+    </NDEF-File_Ctrl_TLV>
+</CapabilityContainerFile>