/**
* 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();
}
}
/**
* Authenticate to given sector of the tag.
*
* @param sectorIndex The sector to authenticate to.
* @param key Key for the authentication.
* @param useAsKeyB If true, key will be treated as key B for authentication.
* @return True if authentication was successful. False otherwise.
*/
private boolean authenticate(int sectorIndex, byte[] key, boolean useAsKeyB) {
try {
if (!useAsKeyB) {
// Key A.
return mMFC.authenticateSectorWithKeyA(sectorIndex, key);
} else {
// Key B.
return mMFC.authenticateSectorWithKeyB(sectorIndex, key);
}
} catch (IOException e) {
Log.d(LOG_TAG, "Error while authenticate with tag.");
}
return false;
}
/**
* 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();
}
}
/**
* Test if all the keys in the KeyChain are valid, i.e. can be used for authenticating.
*
* @return true if all A and B keys can be used to authenticate, false otherwise.
* @throws IOException
*/
public boolean testKeys() throws IOException {
// Tag and key sector count mismatch.
// Need at least as many keys as there are sectors.
if (mTag.getSectorCount() > mKeys.getSectorCount()) return false;
mTag.connect();
try {
for (int i = 0; i < mTag.getSectorCount(); ++i) {
if (!mTag.authenticateSectorWithKeyA(i, mKeys.getKeyA(i))
|| !mTag.authenticateSectorWithKeyB(i, mKeys.getKeyB(i))) {
return false;
}
}
} finally {
mTag.close();
}
return true;
}
/**
* Build Key-Value Pairs in which keys represent the sector and values are one or both of the
* Mifare keys (A/B). The Mifare key information must be set before calling this method (use
* {@link #setKeyFile(File[], Context)}). Also the mapping range must be specified before calling
* this method (use {@link #setMappingRange(int, int)}).<br>
* <br>
* The mapping works like some kind of dictionary attack. All keys are checked against the next
* sector with both authentication methods (A/B). If at least one key was found for a sector, the
* map will be extended with an entry, containing the key(s) and the information for what sector
* the key(s) are. You can get this Key-Value Pairs by calling {@link #getKeyMap()}. A full key
* map can be gained by calling this method as often as there are sectors on the tag (See {@link
* #getSectorCount()}). If you call this method once more after a full key map was created, it
* resets the key map an starts all over.
*
* @return The sector that was checked at the moment. On error it returns "-1" and resets the key
* map to "null".
* @see #getKeyMap()
* @see #setKeyFile(File[], Context)
* @see #setMappingRange(int, int)
* @see #readAsMuchAsPossible(SparseArray)
*/
public int buildNextKeyMapPart() {
// Clear status and key map before new walk through sectors.
boolean error = false;
if (mKeysWithOrder != null && mLastSector != -1) {
if (mKeyMapStatus == mLastSector + 1) {
mKeyMapStatus = mFirstSector;
mKeyMap = new SparseArray<byte[][]>();
}
// Get auto reconnect setting.
boolean autoReconnect =
Common.getPreferences().getBoolean(Preference.AutoReconnect.toString(), false);
byte[][] keys = new byte[2][];
boolean[] foundKeys = new boolean[] {false, false};
// Check next sector against all keys (lines) with
// authentication method A and B.
for (int i = 0; i < mKeysWithOrder.size(); ) {
byte[] key = mKeysWithOrder.get(i);
try {
if (!foundKeys[0] && mMFC.authenticateSectorWithKeyA(mKeyMapStatus, key)) {
keys[0] = key;
foundKeys[0] = true;
}
if (!foundKeys[1] && mMFC.authenticateSectorWithKeyB(mKeyMapStatus, key)) {
keys[1] = key;
foundKeys[1] = true;
}
} catch (Exception e) {
Log.d(LOG_TAG, "Error while building next key map part");
// Is auto reconnect enabled?
if (autoReconnect) {
Log.d(LOG_TAG, "Auto recconect is enabled");
while (!isConnected()) {
// Sleep for 500ms.
try {
Thread.sleep(500);
} catch (InterruptedException ex) {
// Do nothing.
}
// Try to reconnect.
try {
connect();
} catch (IOException ex) {
// Do nothing.
}
}
// Repeat last loop (do not incr. i).
continue;
} else {
error = true;
break;
}
}
if (foundKeys[0] && foundKeys[1]) {
// Both keys found. Continue with next sector.
break;
}
i++;
}
if (!error && (foundKeys[0] || foundKeys[1])) {
// At least one key found. Add key(s).
mKeyMap.put(mKeyMapStatus, keys);
// Key reuse is very likely, so try these first
// for the next sector.
if (foundKeys[0]) {
mKeysWithOrder.remove(keys[0]);
mKeysWithOrder.add(0, keys[0]);
}
if (foundKeys[1]) {
mKeysWithOrder.remove(keys[1]);
mKeysWithOrder.add(0, keys[1]);
}
}
mKeyMapStatus++;
} else {
error = true;
}
if (error) {
mKeyMapStatus = 0;
mKeyMap = null;
return -1;
}
return mKeyMapStatus - 1;
}
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
