NFC read mifare 1k with 6216 classic

[Jorge Gil]

Hello;
I got that:
public class MidletGestion extends MIDlet implements TargetListener, CommandListener {

protected void startApp() throws MIDletStateChangeException {
try {

DiscoveryManager dm = DiscoveryManager.getInstance();

dm.addTargetListener(this, TargetType.ISO14443_CARD);
dm.addTargetListener(this, TargetType.NDEF_TAG);
dm.addTargetListener(this, TargetType.RFID_TAG);
dm.addTargetListener(this, TargetType.VISUAL_TAG);
} catch (IllegalStateException e) {
// Catch IllegalStateException
} catch (ContactlessException e) {
// Catch ContactlessException
}
}

public void targetDetected(TargetProperties[] properties) {
SimpleTagConnection conn = null;
try {
TargetProperties target = properties[0]; // always at least one target

//open the connection

conn = (SimpleTagConnection) Connector.open(target.getUrl(SimpleTagConnection.class));

//read from 4 page, next 8 pages
byte[] res = conn.read(4, 8);

//with the bytes, make a string
codigo = "";
for (int i = 0; i < res.length; i++) {
codigo = codigo + (char) res[i];
}

//we read 32 characters, but just need the first 9
codigo = codigo.substring(0, 8);
//show the text read
textField.setString(codigo);

} catch (Exception e) {
textField.setString("Scan the tag again");
} finally {
closeQuietly(conn); //Importante: close the connection
}
}
}
Now i want read mifare 1k tags

Thank you.


Edit to dont make a longer question.
I got too an application that i copy from examples on visual.net. Read with a ACR122 reader (usb to pc). if any want it i could paste here.

Thanks

[mroland]

Hallo,

dm.addTargetListener(this, TargetType.ISO14443_CARD);
dm.addTargetListener(this, TargetType.NDEF_TAG);
dm.addTargetListener(this, TargetType.RFID_TAG);
dm.addTargetListener(this, TargetType.VISUAL_TAG);

I would suggest that you only register listeners for the target types that you really need (i.e. RFID_TAG for Mifare,..., ISO14443_CARD if you also want to listen for ISO 14443 Type 4 tags/smartcards)

conn = (SimpleTagConnection) Connector.open(target.getUrl(SimpleTagConnection.class));

The SimpleTagConnection is for NFC Forum type 2 tags (e.g. Mifare Ultralight) Have a look at the MFStandardConnection (in package com.nokia.nfc.nxp.mfstd). This can be used to read Mifare Classic 1k/4k.

br,
Michael

[Jorge Gil]

Hallo,


The SimpleTagConnection is for NFC Forum type 2 tags (e.g. Mifare Ultralight) Have a look at the MFStandardConnection (in package com.nokia.nfc.nxp.mfstd). This can be used to read Mifare Classic 1k/4k.

br,
Michael

Thanks, i will take your suggest and just take the listener needed.

About the connection, i know that for Mifare 1k, would use MFS or NDEFTagConnection.

In the visual.net aplication, i charge keys, then authenticate, and then write on the Mifare 1k tag, thats not need on the nokia?

I really wanna know how i can write for example on the block 4(name), 5(e-mail), 6(phone number) for example, but dont know the way to do that and what must do with the target keys.

Thanks and sorry for my english and if im asking some obvious.

[mroland]

Hallo,

About the connection, i know that for Mifare 1k, would use MFS or NDEFTagConnection.
[...]
I really wanna know how i can write for example on the block 4(name), 5(e-mail), 6(phone number) for example, but dont know the way to do that and what must do with the target keys.

You can't do this with the NDEFTagConnection but only with the MFStandardConnection. The NDEFTagConnection is an abstraction to the Forum tag types (and in case of the Nokia API also for Mifare Classic).

In the visual.net aplication, i charge keys, then authenticate, and then write on the Mifare 1k tag, thats not need on the nokia?

That's pretty much the same as you would do on the Nokia:
1. You open the connection:

MFStandardConnection conn = (MFStandardConnection) Connector.open(targetUrl);

2. Then your application can either use the Mifare application directory (MAD) to find its allocated secors or can access the sector immediatly without the MAD:

MFSector mfsector = conn.getSector(sectorIndex);

3. Within the secor you can access each block with:

MFBlock mfblock = mfsector.getBlock(blockIndex);

4. Then you can read the block's data with something like this (NOW you authenticate with the sector specific key):

byte[] KEY_SECTOR = {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF};
byte[] blockdata = new byte[mfblock.size()];
readcnt = mfblock.read(new MFKey.KeyA(KEY_SECTOR), blockdata, 0, 0, mfblock.size());

br,
Michael

[mroland]

Of course, you could also use the NDEFTagConnection and take advantage of the abstraction level of the NFC Data Exchange Format (NDEF). This way you could use the same code to write to any NFC tag (i.e. Topaz, Mifare Ultralight, ...) and even Mifare Classic. But as you would then work independent of the actual tag format, you could no longer force the location of your data (i.e. name is in sector 4, e-mail in sector 5). Instead you would have one NDEF message that is composed of one or more NDEF records, where each record holds one or more of your data elements.

br,
Michael

[Jorge Gil]

uoooh

I see, really thanks for your explanation, help me too much.

I will work on that and when take any score i will come back here to told.

Thanks for the info .

[Jorge Gil]

Here is a part of the code developed on visual.net,

Private Sub cargarClave()
Dim indx As Integer
Dim tmpStr As String

Call ClearBuffers()
'Load Authentication Keys command
SendBuff(0) = &HFF 'Class
SendBuff(1) = &H82 'INS
SendBuff(2) = &H0 'P1 : Key Structure
SendBuff(3) = CLng("&H" + "01") 'P2 : Key Number
SendBuff(4) = &H6 'P3 : Lc
SendBuff(5) = CLng("&H" + "FF") 'Key 1
SendBuff(6) = CLng("&H" + "FF") 'Key 2
SendBuff(7) = CLng("&H" + "FF") 'Key 3
SendBuff(8) = CLng("&H" + "FF") 'Key 4
SendBuff(9) = CLng("&H" + "FF") 'Key 5
SendBuff(10) = CLng("&H" + "FF") 'Key 6
'SendBuff(10) = CLng("&H" + tKey6.Text) 'Key 6

SendLen = 11
RecvLen = 2

retCode = SendAPDU()
If retCode <> ModWinsCard.SCARD_S_SUCCESS Then
Exit Sub
Else
For indx = RecvLen - 2 To RecvLen - 1

tmpStr = tmpStr + Microsoft.VisualBasic.Right("00" & Hex(RecvBuff(indx)), 2) + " "

Next indx
'Check for response
If tmpStr.Trim <> "90 00" Then

Call displayOut(4, 0, "Load authentication keys error!")

End If
End If

End Sub


Private Sub autentificar()

Dim tmpLong As Byte
Dim tempInt, indx As Integer
Dim tmpStr As String

Call ClearBuffers()
'Authentication command
SendBuff(0) = &HFF 'Class
SendBuff(1) = &H86 'INS
SendBuff(2) = &H0 'P1
SendBuff(3) = &H0 'P2
SendBuff(4) = &H5 'Lc
SendBuff(5) = &H1 'Byte 1 : Version number
SendBuff(6) = &H0 'Byte 2
If bloque = "01" Then
SendBuff(7) = CInt(bloque) 'Byte 3 : Block number
Else
SendBuff(7) = bloque 'CInt(bloque) 'Byte 3 : Block number
End If

SendBuff(8) = &H60 'Byte 4 : Key Type A

SendBuff(9) = CInt("&H" & "01") 'Byte 5 : Key number

SendLen = 10
RecvLen = 2

retCode = SendAPDU()
If retCode <> ModWinsCard.SCARD_S_SUCCESS Then
Exit Sub
Else
For indx = 0 To RecvLen - 1

tmpStr = tmpStr + Microsoft.VisualBasic.Right("00" & Hex(RecvBuff(indx)), 2) + " "

Next indx

'Checking for response
If tmpStr.Trim = "90 00" Then

Call displayOut(0, 0, "Authentication success")
Else
Call displayOut(4, 0, "Authentication failed")
End If
End If


End Sub

I still work with your help, thanks

PD: this code in case anyone was left with the curiosity to know.

[Jorge Gil]

#

TextField textField;   //cuadro de texto
    Ticker ticker;      //marquesina
    boolean intr = false;   //booleano de comprobacion
    String nombre="";
    private int sectorIndex=2;
    private int blockIndex=1;
    private int readcnt;
    String internalUrl = System.getProperty("internal.mf.url");

#


#

public void targetDetected(TargetProperties[] properties) {
        try {
            TargetProperties target = properties[0]; // always at least one target

             MFStandardConnection conn = (MFStandardConnection) Connector.open(internalUrl);

             MFSector mfsector = conn.getSector(sectorIndex);

            MFBlock mfblock = mfsector.getBlock(blockIndex);

            byte[] KEY_SECTOR = {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF};
            byte[] blockdata = new byte[mfblock.size()];
            readcnt = mfblock.read(new MFKey.KeyA(KEY_SECTOR), blockdata, 0, 0, mfblock.size());

            textField.setString(nombre);

        } catch (Exception e) {
            textField.setString("Vuelva a escanear la etiqueta");
        } finally {
            closeQuietly(conn);   //<---- Here fail Why?
        }
    }

    private void closeQuietly(javax.microedition.io.Connection conn) {
        try {
            conn.close();
        } catch (Exception ex) {
            // Nada
        }
    }

#

How can i do the text read from the tag, put into screen on my textField?
And when i try to read always do "Vuelva a escanear la etiqueta" its the same like Scan the tag again.

Thanks

[mroland]

Hallo Jorge Gil,

I dont understand some like:

readcnt = mfblock.read(new MFKey.KeyA(KEY_SECTOR), blockdata, 0, 0, mfblock.size());

i think that KeyA is the key (obviuos maybe),
blockdata means you are trying to read data from a block, but dstOffSet, srcOffSet what is? the bit where you start (0) to read and where finish(0)? then, what is length?

Have a look at the JavaDoc for Nokia's JSR-257 extensions. This documentation comes with both SDKs (i.e. the one for the Nokia 6131 NFC and the one for the Nokia 6221). It's usually located somewhere in "<NOKIA_SDKS_ROOT>\Nokia\Devices\Nokia_6131_NFC_SDK_1_1\docs\nfc_ext" and "<NOKIA_SDKS_ROOT>\Nokia\Devices\S40_Nokia_6212_NFC_SDK\doc\WebHelp\WebHelp\jsr257nokiaextensions" respectively.

Regarding the read function the documentation gives something like this:

read

public int read(MFKey key,
byte[] dst,
int dstOffset,
int srcOffset,
int length)
throws MFStandardException,
java.io.IOException

Reads a region of bytes from this data area and stores the read result in the dst array starting at offset dstOffset.

If the reading is only partially succesful then no exception will be thrown. For example if the first 16 bytes is read successfully but then access conditions deny further reading, the reading stops. If reading fails right from the start then an MFStandardException is thrown. The amount of data read successfully is returned as the return value.

Parameters:
key - the authentication key. If null then the device's default keys are used.
dst - the destination array.
dstOffset - start position in the destination array.
srcOffset - the byte offset within this data area.
length - the amount of bytes to read.
Returns:
amount of data read in bytes.
Throws:
MFStandardException - if authentication fails.
java.io.IOException - if a connection error occurs.
java.lang.NullPointerException - if dst is null.
java.lang.IllegalArgumentException - if either the source or destination byte range is out of bounds.

This means that key can either be a KeyA or a KeyB object that specifies the authentication key (Mifare Auth Key A or B respectively).

dst is an array, that will be filled with the read data bytes.

dstOffset is the index of the array dst, where the first data byte of the read data will be. This, if dstOffset is 0, then dst[0] will hold the first data byte, dst[1] will hold the second data byte, ... If dstOffset is 3, then the first data byte will be in dst[3], the second in dst[4], ...

srcOffset is the position (in byte) within the block, where the read procedure should begin. I.e. if this is 2, the first two bytes of the block will be skipped.

Therefore a read will look like this:
blockdata[dstOffset + 0] := data in block[srcOffset + 0]
blockdata[dstOffset + 1] := data in block[srcOffset + 1]
...
blockdata[dstOffset + length - 2] := data in block[srcOffset + length - 2]
blockdata[dstOffset + length - 1] := data in block[srcOffset + length - 1]


br,
Michael

[mroland]

Hallo,

String internalUrl = System.getProperty("internal.mf.url");

[...]

public void targetDetected(TargetProperties[] properties) {
  try {
    TargetProperties target = properties[0]; // always at least one target

    MFStandardConnection conn = (MFStandardConnection) Connector.open(internalUrl);

    MFSector mfsector = conn.getSector(sectorIndex);

  } catch (Exception e) {
    textField.setString("Vuelva a escanear la etiqueta");
  } finally {
    closeQuietly(conn);   //<---- Here fail Why?
  }
}

How can i do the text read from the tag, put into screen on my textField?
And when i try to read always do "Vuelva a escanear la etiqueta" its the same like Scan the tag again.

I'm not sure what you are trying to accomplish here. On the one hand you are reacting on the targetDetected event, but on the other hand you try to connect to the internal Mifare section of the mobile phone (internalUrl = System.getProperty("internal.mf.url")).

So, to connect to the external Mifare card that triggered the event, you should change the line

MFStandardConnection conn = (MFStandardConnection) Connector.open(internalUrl);

to something like this

MFStandardConnection conn = (MFStandardConnection) Connector.open(target.getUrl(MFStandardConnection.class));

br,
Michael

[Jorge Gil]

Hallo,

I'm not sure what you are trying to accomplish here. On the one hand you are reacting on the targetDetected event, but on the other hand you try to connect to the internal Mifare section of the mobile phone (internalUrl = System.getProperty("internal.mf.url")).

br,
Michael

Hello Michael:

Im trying to read a tag and put the information of 3 blocks into 3 textfields to show on the screen. internalUrl was to try if the phone do something (watched on internet, jejeje).

Then, connection is open, sector and block selected

public void targetDetected(TargetProperties[] properties) {
             try {
            TargetProperties target = properties[0]; // always at least one target
            MFStandardConnection conn = (MFStandardConnection) Connector.open(target.getUrl(MFStandardConnection.class));
            MFSector mfsector = conn.getSector(sectorIndex);
            MFBlock mfblock = mfsector.getBlock(blockIndex);

And then charge keys, and read the byte array

  byte[] KEY_SECTOR = {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF};
            byte[] blockdata = new byte[mfblock.size()];
            readcnt = mfblock.read(new MFKey.KeyA(KEY_SECTOR), blockdata, 0, 0, mfblock.size());

For finish wanna show the text on the tag in the screen, how to do it.
Shomethink like: string nombre = readcnt.toString();??

textField.setString(nombre);

Maybe im asking too much but, im doing my studentship and they just give me a pc, a Nokia 6212, few tags and told me do that (but they dont know how to do it) and i wanna learn because are good to me.

Thank you again.

[Jorge Gil]

It WORKS

textField.setString(new String(blockdata));

and put into screen *^_^*
Thanks.

Now next step its read another 2 blocks and put the 3 dates on the same screen.

When finish it, then must write on the tag, same application could read and write at same time?
I have one to read and one to write. But dont know if on the same targetDetected could do at same time.

Thanks very much again, hope i will understand lot of things of NFC to help people too.

PD: sorry for my english again :P

PD2: i will come back ^_^

[mroland]

Hallo,

It WORKS

textField.setString(new String(blockdata));

Fine. Here you might also want to take a look into specifying the right character encoding in the String() constructor. I.e. with new String(blockdata, "ISO8859-1") you apply the ISO 8859-1 character encoding to the bytes from blockdata. Similarly, you could use new String(blockdata, "UTF-8") if the encoding of blockdata was UTF-8.

When finish it, then must write on the tag, same application could read and write at same time?

Of course, the same application can read and write data from/to a tag. Even in the same instance of the targetDetected event.

br,
Michael

[Jorge Gil]

Fine. Here you might also want to take a look into specifying the right character encoding in the String() constructor. I.e. with new String(blockdata, "ISO8859-1") you apply the ISO 8859-1 character encoding to the bytes from blockdata. Similarly, you could use new String(blockdata, "UTF-8") if the encoding of blockdata was UTF-8.

At the moment its enought read/write jejeje but i will remember all that you said.

Of course, the same application can read and write data from/to a tag. Even in the same instance of the targetDetected event.

br,
Michael

This will be next step, maybe tomorrow ask for more information, today wanna finish the read section :P

Im very happy today, it woooorks

[Jorge Gil]

Hello Michael:

Its time to write :P

I will put on the same targetDetected the part of read and the part of writ but...it works?

How can i do? using a switch? or must make with if?, or just put after the read section?

and for write i supose must be same, but changing the word read for the word write, ehehehe.

Jorge