/**
* Write all the blocks in a Tag to the Mifare tag.
*
* @param t
* @throws IOException
*/
public void write(Tag t) throws IOException {
if (t.getSectorCount() > mKeys.getSectorCount()) throw new IOException("Too few keys");
mTag.connect();
int sectors = mTag.getSectorCount();
try {
for (int s = 0; s < sectors; ++s) {
// Authenticate for each sector (try B key, then A key)
if (!mTag.authenticateSectorWithKeyB(s, mKeys.getKeyB(s))
&& !mTag.authenticateSectorWithKeyA(s, mKeys.getKeyA(s)))
throw new IOException("Auth error");
// Write to tag. Skip block 0 and the trailer of each sector
int blockOffset = mTag.sectorToBlock(s);
int lastBlock = blockOffset + mTag.getBlockCountInSector(s);
// Skip block 0
blockOffset = blockOffset == 0 ? 1 : blockOffset;
for (int b = blockOffset; b < lastBlock; ++b) {
mTag.writeBlock(b, t.getBlock(b));
if (mProgressListener != null)
mProgressListener.publishProgress((100 * b) / t.getBlockCount());
}
}
} finally {
mTag.close();
}
}
private void resolveIntent(Intent intent) {
String action = intent.getAction();
toast("resolving intent");
if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) {
toast("RESOLVE THIS INTENT");
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
receiveTab.append("\nResolve Intent for NDEF discovery");
} else if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(action)) {
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
MifareClassic mfc = MifareClassic.get(tagFromIntent);
byte[] data;
receiveTab.append("\nNew tech tag received");
try {
mfc.connect();
boolean auth = false;
String cardData = null;
int secCount = mfc.getSectorCount();
int bCount = 0;
int bIndex = 0;
for (int j = 0; j < secCount; j++) {
auth = mfc.authenticateSectorWithKeyA(j, MifareClassic.KEY_DEFAULT);
if (auth) {
bCount = mfc.getBlockCountInSector(j);
bIndex = 0;
for (int i = 0; i < bCount; i++) {
bIndex = mfc.sectorToBlock(j);
data = mfc.readBlock(bIndex);
cardData = new String(data);
receiveTab.append("\n" + cardData);
bIndex++;
}
} else {
Toast.makeText(this, "Auth failed", Toast.LENGTH_LONG).show();
}
}
} catch (IOException ex) {
Toast.makeText(this, "IO Error while attempting to read mifare", Toast.LENGTH_LONG).show();
}
} else if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)) {
receiveTab.append("\nSome Tag found from card");
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
receiveTab.append("\n" + tagFromIntent.toString());
for (int k = 0; k < tagFromIntent.getTechList().length; k++) {
receiveTab.append("\nTech List: " + tagFromIntent.getTechList()[k]);
if (tagFromIntent.getTechList()[k].equals("android.nfc.tech.NfcA")) {
// Run connection method
parseNfcATag(tagFromIntent);
// connectToNDEF(tagFromIntent);
// parseMifareTag(tagFromIntent);
} else if (tagFromIntent.getTechList()[k].equals("android.nfc.tech.Ndef")) {
connectToNDEF(tagFromIntent);
// receiveTab.append("\nRun connect to NDEF");
}
}
}
}
/**
* Read all blocks from the Mifare tag and return the data in a Tag object.
*
* @return A Tag object containing the data of the Mifare tag.
* @throws IOException
*/
public Tag read() throws IOException {
int sectors = mTag.getSectorCount();
Tag t = new Tag(TagType.getType(sectors));
if (t.getSectorCount() > mKeys.getSectorCount()) throw new IOException("Too few keys");
mTag.connect();
try {
for (int s = 0; s < sectors; ++s) {
byte[] aKey = mKeys.getKeyA(s);
byte[] bKey = mKeys.getKeyB(s);
// Authenticate for each sector (try A key, then B key)
if (!mTag.authenticateSectorWithKeyA(s, aKey) && !mTag.authenticateSectorWithKeyB(s, bKey))
throw new IOException("Auth error");
// Read every block of the sector
int blockOffset = mTag.sectorToBlock(s);
int lastBlock = blockOffset + mTag.getBlockCountInSector(s);
for (int b = blockOffset; b < lastBlock; ++b) {
byte[] readBuffer = mTag.readBlock(b);
// Manually transfer key data to tag since it is usually not
// readable
if (b == lastBlock - 1) {
for (int i = 0; i < Tag.KEY_SIZE; ++i) {
readBuffer[i] = aKey[i];
readBuffer[Tag.BLOCK_SIZE - Tag.KEY_SIZE + i] = bKey[i];
}
}
t.setBlock(b, readBuffer);
if (mProgressListener != null)
mProgressListener.publishProgress((100 * b) / t.getBlockCount());
}
}
return t;
} finally {
mTag.close();
}
}
/**
* Write a block of 16 byte data to tag.
*
* @param sectorIndex The sector to where the data should be written
* @param blockIndex The block to where the data should be written
* @param data 16 byte of data.
* @param key The Mifare Classic key for the given sector.
* @param useAsKeyB If true, key will be treated as key B for authentication.
* @return The return codes are:<br>
* <ul>
* <li>0 - Everything went fine.
* <li>1 - Sector index is out of range.
* <li>2 - Block index is out of range.
* <li>3 - Data are not 16 byte.
* <li>4 - Authentication went wrong.
* <li>-1 - Error while writing to tag.
* </ul>
*
* @see #authenticate(int, byte[], boolean)
*/
public int writeBlock(
int sectorIndex, int blockIndex, byte[] data, byte[] key, boolean useAsKeyB) {
if (mMFC.getSectorCount() - 1 < sectorIndex) {
return 1;
}
if (mMFC.getBlockCountInSector(sectorIndex) - 1 < blockIndex) {
return 2;
}
if (data.length != 16) {
return 3;
}
if (!authenticate(sectorIndex, key, useAsKeyB)) {
return 4;
}
// Write block.
int block = mMFC.sectorToBlock(sectorIndex) + blockIndex;
try {
mMFC.writeBlock(block, data);
} catch (IOException e) {
Log.e(LOG_TAG, "Error while writing block to tag.", e);
return -1;
}
return 0;
}
/**
* Return the block count in a specific sector.
*
* @param sectorIndex Index of a sector.
* @return Block count in given sector.
*/
public int getBlockCountInSector(int sectorIndex) {
return mMFC.getBlockCountInSector(sectorIndex);
}
/**
* This method checks if the present tag is writable with the provided keys on the given positions
* (sectors, blocks). This is done by authenticating with one of the keys followed by reading and
* interpreting ({@link Common#getOperationInfoForBlock(byte, byte, byte,
* de.syss.MifareClassicTool.Common.Operations, boolean, boolean)}) of the Access Conditions.
*
* @param pos A map of positions (key = sector, value = Array of blocks). For each of these
* positions you will get the write information (see return values).
* @param keyMap A key map a generated by {@link Activities.KeyMapCreator}.
* @return A map within a map (all with type = Integer). The key of the outer map is the sector
* number and the value is another map with key = block number and value = write information.
* The write information indicates which key is needed to write to the present tag on the
* given position.<br>
* <br>
* Write informations are:<br>
* <ul>
* <li>0 - Never
* <li>1 - Key A
* <li>2 - Key B
* <li>3 - Key A|B
* <li>4 - Key A, but AC never
* <li>5 - Key B, but AC never
* <li>6 - Key B, but keys never
* <li>-1 - Error
* <li>Inner map == null - Whole sector is dead (IO Error) or ACs are incorrect
* <li>null - Authentication error
* </ul>
*/
public HashMap<Integer, HashMap<Integer, Integer>> isWritableOnPositions(
HashMap<Integer, int[]> pos, SparseArray<byte[][]> keyMap) {
HashMap<Integer, HashMap<Integer, Integer>> ret =
new HashMap<Integer, HashMap<Integer, Integer>>();
for (int i = 0; i < keyMap.size(); i++) {
int sector = keyMap.keyAt(i);
if (pos.containsKey(sector)) {
byte[][] keys = keyMap.get(sector);
byte[] ac = null;
// Authenticate.
if (keys[0] != null) {
if (authenticate(sector, keys[0], false) == false) {
return null;
}
} else if (keys[1] != null) {
if (authenticate(sector, keys[1], true) == false) {
return null;
}
} else {
return null;
}
// Read Mifare Access Conditions.
int acBlock = mMFC.sectorToBlock(sector) + mMFC.getBlockCountInSector(sector) - 1;
try {
ac = mMFC.readBlock(acBlock);
} catch (IOException e) {
ret.put(sector, null);
continue;
}
ac = Arrays.copyOfRange(ac, 6, 9);
byte[][] acMatrix = Common.acBytesToACMatrix(ac);
if (acMatrix == null) {
ret.put(sector, null);
continue;
}
boolean isKeyBReadable =
Common.isKeyBReadable(acMatrix[0][3], acMatrix[1][3], acMatrix[2][3]);
// Check all Blocks with data (!= null).
HashMap<Integer, Integer> blockWithWriteInfo = new HashMap<Integer, Integer>();
for (int block : pos.get(sector)) {
if ((block == 3 && sector <= 31) || (block == 15 && sector >= 32)) {
// Sector Trailer.
// Are the Access Bits writable?
int acValue =
Common.getOperationInfoForBlock(
acMatrix[0][3],
acMatrix[1][3],
acMatrix[2][3],
Common.Operations.WriteAC,
true,
isKeyBReadable);
// Is key A writable? (If so, key B will be writable
// with the same key.)
int keyABValue =
Common.getOperationInfoForBlock(
acMatrix[0][3],
acMatrix[1][3],
acMatrix[2][3],
Common.Operations.WriteKeyA,
true,
isKeyBReadable);
int result = keyABValue;
if (acValue == 0 && keyABValue != 0) {
// Write key found, but ac-bits are not writable.
result += 3;
} else if (acValue == 2 && keyABValue == 0) {
// Access Bits are writable with key B,
// but keys are not writable.
result = 6;
}
blockWithWriteInfo.put(block, result);
} else {
// Data block.
int acBitsForBlock = block;
// Handle Mifare Classic 4k Tags.
if (sector >= 32) {
if (block >= 0 && block <= 4) {
acBitsForBlock = 0;
} else if (block >= 5 && block <= 9) {
acBitsForBlock = 1;
} else if (block >= 10 && block <= 14) {
acBitsForBlock = 2;
}
}
blockWithWriteInfo.put(
block,
Common.getOperationInfoForBlock(
acMatrix[0][acBitsForBlock],
acMatrix[1][acBitsForBlock],
acMatrix[2][acBitsForBlock],
Common.Operations.Write,
false,
isKeyBReadable));
}
}
if (blockWithWriteInfo.size() > 0) {
ret.put(sector, blockWithWriteInfo);
}
}
}
return ret;
}
private void resolveIntent(Intent intent) {
// 1) Parse the intent and get the action that triggered this intent
String action = intent.getAction();
// 2) Check if it was triggered by a tag discovered interruption.
if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(action)) {
mydialog = ProgressDialog.show(ReadCardActivity.this, "loading", "loading");
// 3) Get an instance of the TAG from the NfcAdapter
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
// 4) Get an instance of the Mifare classic card from this TAG
// intent
MifareClassic mfc = MifareClassic.get(tagFromIntent);
MifareClassCard mifareClassCard = null;
try {
// 5.1) Connect to card
mfc.connect();
// 5.2) and get the number of sectors this card has..and loop
// thru these sectors
int secCount = mfc.getSectorCount();
mifareClassCard = new MifareClassCard(secCount);
// init information
String techtemp = "";
for (String tech : mfc.getTag().getTechList()) {
techtemp = techtemp + tech + "\n";
}
mifareClassCard.addValue("UID", Converter.getHexString(mfc.getTag().getId()));
mifareClassCard.addValue("TechList", techtemp);
// mifareClassCard.addValue("MemorySize", mfc.get);
int bCount = 0;
int bIndex = 0;
for (int j = 0; j < secCount; j++) {
boolean authKeyA = false;
boolean authKeyB = false;
MifareSector mifareSector = new MifareSector();
mifareSector.sectorIndex = j;
// 6.1) authenticate the sector
for (String key : defaultKeys) {
if (!authKeyA) {
authKeyA = mfc.authenticateSectorWithKeyA(j, Converter.hexStringToByteArray(key));
mifareSector.keyA = new MifareKey(Converter.hexStringToByteArray(key));
}
if (!authKeyB) {
authKeyB = mfc.authenticateSectorWithKeyB(j, Converter.hexStringToByteArray(key));
mifareSector.keyB = new MifareKey(Converter.hexStringToByteArray(key));
}
// 都满足则break
if (authKeyA && authKeyB) {
break;
}
}
if ((authKeyA && authKeyB) || authKeyA || authKeyB) {
mifareSector.authorized = true;
// 6.2) In each sector - get the block count
bCount = mfc.getBlockCountInSector(j);
bCount = Math.min(bCount, MifareSector.BLOCKCOUNT);
bIndex = mfc.sectorToBlock(j);
// set access condition
byte[] acdata = mfc.readBlock(bIndex + 3);
String hexString = Converter.getHexString(acdata, 16);
mifareSector.accessCondition = hexString.substring(12, 20);
for (int i = 0; i < bCount; i++) {
// 6.3) Read the block
byte[] data = mfc.readBlock(bIndex);
// System.out.println(Converter.getHexString(data, 16));
MifareBlock mifareBlock = new MifareBlock(mifareSector);
mifareBlock.setData(data);
mifareBlock.setIndex(bIndex);
// 7) Convert the data into a string from Hex
// format.
bIndex++;
mifareSector.blocks[i] = mifareBlock;
}
mifareClassCard.setSector(mifareSector.sectorIndex, mifareSector);
} else { // Authentication failed - Handle it
mifareSector.authorized = false;
}
}
this.mydialog.dismiss();
mfc.close();
Intent dataIntent = new Intent(this, ViewCardActivity.class);
Bundle bundle = new Bundle();
bundle.putSerializable("mifare", mifareClassCard);
dataIntent.putExtras(bundle);
this.startActivityForResult(dataIntent, 0);
this.finish();
} catch (IOException e) {
Log.e(TAG, e.getLocalizedMessage());
showAlert(3);
this.mydialog.dismiss();
} finally {
if (mifareClassCard != null) {
// mifareClassCard.debugPrint();
}
}
} // End of IF
} // End of method
