arti/Estonian-ID-card-mobile-authenticator-POC
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Merge remote-tracking branch 'origin/Tests' into Tests

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# Conflicts:
#	MobileAuthApp/app/src/androidTest/java/com/tarkvaraprojekt/mobileauthapp/UC4Test.kt
#	MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/AuthFragment.kt
#	MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/NFC/Comms.java
This commit is contained in:
stargateprovider 2021-12-04 21:55:40 +02:00
commit 67ba0ed764
2 changed files with 167 additions and 261 deletions
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94
MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/AuthFragment.kt
View File

@ -1,13 +1,10 @@
package com.tarkvaraprojekt.mobileauthapp package com.tarkvaraprojekt.mobileauthapp
import android.app.Activity
import android.content.Context
import android.content.Intent import android.content.Intent
import android.nfc.NfcAdapter import android.nfc.NfcAdapter
import android.nfc.tech.IsoDep import android.nfc.tech.IsoDep
import android.os.Bundle import android.os.Bundle
import android.os.CountDownTimer import android.os.CountDownTimer
import android.util.Log
import android.view.LayoutInflater import android.view.LayoutInflater
import android.view.View import android.view.View
import android.view.ViewGroup import android.view.ViewGroup
@ -17,11 +14,14 @@ import androidx.fragment.app.activityViewModels
import androidx.navigation.fragment.findNavController import androidx.navigation.fragment.findNavController
import androidx.navigation.fragment.navArgs import androidx.navigation.fragment.navArgs
import com.tarkvaraprojekt.mobileauthapp.NFC.Comms import com.tarkvaraprojekt.mobileauthapp.NFC.Comms
import com.tarkvaraprojekt.mobileauthapp.auth.Authenticator import com.tarkvaraprojekt.mobileauthapp.auth.AuthAppException
import com.tarkvaraprojekt.mobileauthapp.auth.InvalidCANException
import com.tarkvaraprojekt.mobileauthapp.databinding.FragmentAuthBinding import com.tarkvaraprojekt.mobileauthapp.databinding.FragmentAuthBinding
import com.tarkvaraprojekt.mobileauthapp.model.ParametersViewModel import com.tarkvaraprojekt.mobileauthapp.model.ParametersViewModel
import com.tarkvaraprojekt.mobileauthapp.model.SmartCardViewModel import com.tarkvaraprojekt.mobileauthapp.model.SmartCardViewModel
import java.io.IOException
import java.lang.Exception import java.lang.Exception
import java.security.GeneralSecurityException
import kotlin.system.exitProcess import kotlin.system.exitProcess
/** /**
@ -69,7 +69,6 @@ class AuthFragment : Fragment() {
goToTheStart() goToTheStart()
} }
}.start() }.start()
//binding!!.nextButton.visibility = View.INVISIBLE
binding!!.nextButton.setOnClickListener { goToNextFragment() } binding!!.nextButton.setOnClickListener { goToNextFragment() }
binding!!.cancelButton.setOnClickListener { goToTheStart() } binding!!.cancelButton.setOnClickListener { goToTheStart() }
val adapter = NfcAdapter.getDefaultAdapter(activity) val adapter = NfcAdapter.getDefaultAdapter(activity)
@ -78,24 +77,19 @@ class AuthFragment : Fragment() {
} }
private fun getInfoFromIdCard(adapter: NfcAdapter) { private fun getInfoFromIdCard(adapter: NfcAdapter) {
adapter.enableReaderMode(activity, { tag -> if (args.reading) {
timer.cancel() adapter.enableReaderMode(activity, { tag ->
requireActivity().runOnUiThread { timer.cancel()
binding!!.timeCounter.text = getString(R.string.card_detected) requireActivity().runOnUiThread {
} binding!!.timeCounter.text = getString(R.string.card_detected)
val card = IsoDep.get(tag) }
card.timeout = 32768 var msgCode = 0
card.use {
try { val card = IsoDep.get(tag)
val comms = Comms(it, viewModel.userCan) card.timeout = 32768
if (args.auth) { card.use {
val jws = Authenticator(comms).authenticate( try {
intentParameters.challenge, val comms = Comms(it, viewModel.userCan)
intentParameters.origin,
viewModel.userPin
)
intentParameters.setToken(jws)
} else {
val response = comms.readPersonalData(byteArrayOf(1, 2, 6, 3, 4, 8)) val response = comms.readPersonalData(byteArrayOf(1, 2, 6, 3, 4, 8))
viewModel.setUserFirstName(response[1]) viewModel.setUserFirstName(response[1])
viewModel.setUserLastName(response[0]) viewModel.setUserLastName(response[0])
@ -103,24 +97,45 @@ class AuthFragment : Fragment() {
viewModel.setGender(response[3]) viewModel.setGender(response[3])
viewModel.setCitizenship(response[4]) viewModel.setCitizenship(response[4])
viewModel.setExpiration(response[5]) viewModel.setExpiration(response[5])
requireActivity().runOnUiThread {
binding!!.timeCounter.text = getString(R.string.data_read)
}
} catch (e: android.nfc.TagLostException) {
msgCode = R.string.tag_lost
} catch (e: InvalidCANException) {
msgCode = R.string.invalid_can
// If the CAN is wrong we will also delete the saved CAN so that the user won't use it again.
viewModel.deleteCan(requireContext())
} catch (e: AuthAppException) {
msgCode = when (e.code) {
448 -> R.string.err_bad_data
500 -> R.string.err_internal
else -> R.string.err_unknown
}
} catch (e: GeneralSecurityException) {
msgCode = R.string.err_internal
} catch (e: IOException) {
msgCode = R.string.err_reading_card
} catch (e: Exception) {
msgCode = R.string.err_unknown
} finally {
adapter.disableReaderMode(activity)
} }
requireActivity().runOnUiThread {
binding!!.timeCounter.text = getString(R.string.data_read) if (msgCode != 0) {
requireActivity().runOnUiThread {
binding!!.timeCounter.text = getString(msgCode)
}
// Gives user some time to read the error message
Thread.sleep(1000)
goToTheStart()
} }
} catch (e: Exception) {
requireActivity().runOnUiThread {
binding!!.timeCounter.text = getString(R.string.no_success)
}
// If the CAN is wrong we will also delete the saved CAN so that the user won't use it again.
viewModel.deleteCan(requireContext())
// Gives user some time to read the error message
Thread.sleep(1000)
goToTheStart()
} finally {
adapter.disableReaderMode(activity)
} }
} }, NfcAdapter.FLAG_READER_NFC_A, null)
}, NfcAdapter.FLAG_READER_NFC_A, null) } else { //We want to create a JWT instead of reading the info from the card.
goToNextFragment()
}
} }
private fun goToNextFragment() { private fun goToNextFragment() {
@ -141,7 +156,8 @@ class AuthFragment : Fragment() {
} else { } else {
if (!args.mobile) { if (!args.mobile) {
//Currently for some reason the activity is not killed entirely. Must be looked into further. //Currently for some reason the activity is not killed entirely. Must be looked into further.
requireActivity().finishAndRemoveTask() requireActivity().finish()
exitProcess(0)
} else { } else {
val resultIntent = Intent() val resultIntent = Intent()
requireActivity().setResult(AppCompatActivity.RESULT_CANCELED, resultIntent) requireActivity().setResult(AppCompatActivity.RESULT_CANCELED, resultIntent)

334
MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/NFC/Comms.java
View File

@ -3,6 +3,9 @@ package com.tarkvaraprojekt.mobileauthapp.NFC;
import android.nfc.tech.IsoDep; import android.nfc.tech.IsoDep;
import android.util.Log; import android.util.Log;
import com.tarkvaraprojekt.mobileauthapp.auth.AuthAppException;
import com.tarkvaraprojekt.mobileauthapp.auth.InvalidCANException;
import org.bouncycastle.crypto.BlockCipher; import org.bouncycastle.crypto.BlockCipher;
import org.bouncycastle.crypto.engines.AESEngine; import org.bouncycastle.crypto.engines.AESEngine;
import org.bouncycastle.crypto.macs.CMac; import org.bouncycastle.crypto.macs.CMac;
@ -21,7 +24,6 @@ import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException; import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom; import java.security.SecureRandom;
import java.util.Arrays; import java.util.Arrays;
import java.util.Base64;
import javax.crypto.BadPaddingException; import javax.crypto.BadPaddingException;
import javax.crypto.Cipher; import javax.crypto.Cipher;
@ -31,43 +33,47 @@ import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec; import javax.crypto.spec.SecretKeySpec;
public class Comms { public class Comms {
private static final byte[] master = { // select Main AID
0, -92, 4, 12, 16, -96, 0, 0, 0, 119, 1, 8, 0, 7, 0, 0, -2, 0, 0, 1, 0
};
private static final byte[] selectMaster = Hex.decode("00a4040c10a000000077010800070000fe00000100"); private static final byte[] MSESetAT = { // manage security environment: set authentication template
0, 34, -63, -92, 15, -128, 10, 4, 0, 127, 0, 7, 2, 2, 4, 2, 4, -125, 1, 2, 0
};
private static final byte[] MSESetAT = Hex.decode("0022c1a40f800a04007f0007020204020483010200"); private static final byte[] GAGetNonce = { // general authenticate: get nonce
16, -122, 0, 0, 2, 124, 0, 0
};
private static final byte[] GAGetNonce = Hex.decode("10860000027c0000"); private static final byte[] GAMapNonceIncomplete = {
16, -122, 0, 0, 69, 124, 67, -127, 65
};
private static final byte[] GAMapNonceIncomplete = Hex.decode("10860000457c438141"); private static final byte[] GAKeyAgreementIncomplete = {
16, -122, 0, 0, 69, 124, 67, -125, 65
};
private static final byte[] GAKeyAgreementIncomplete = Hex.decode("10860000457c438341"); private static final byte[] GAMutualAuthenticationIncomplete = {
0, -122, 0, 0, 12, 124, 10, -123, 8
};
private static final byte[] GAMutualAuthenticationIncomplete = Hex.decode("008600000c7c0a8508"); private static final byte[] dataForMACIncomplete = {
127, 73, 79, 6, 10, 4, 0, 127, 0, 7, 2, 2, 4, 2, 4, -122, 65
};
private static final byte[] dataForMACIncomplete = Hex.decode("7f494f060a04007f000702020402048641"); private static final byte[] masterSec = {
12, -92, 4, 12, 45, -121, 33, 1
};
private static final byte[] selectFile = Hex.decode("0ca4010c1d871101"); private static final byte[] personal = { // select personal data DF
12, -92, 1, 12, 29, -121, 17, 1
};
private static final byte[] readFile = Hex.decode("0cb000000d970100"); private static final byte[] read = { // read binary
12, -80, 0, 0, 13, -105, 1, 0
};
private static final byte[] verifyPIN1 = Hex.decode("0c2000011d871101"); private IsoDep idCard;
private static final byte[] verifyPIN2 = Hex.decode("0c2000851d871101");
private static final byte[] MSESetEnv = Hex.decode("0c2241A41d871101");
private static final byte[] Env = Hex.decode("8004FF200800840181");
private static final byte[] InternalAuthenticate = Hex.decode("0c8800001d871101");
private static final byte[] IASECCFID = {0x3f, 0x00};
private static final byte[] personalDF = {0x50, 0x00};
private static final byte[] AWP = {(byte) 0xad, (byte) 0xf1};
private static final byte[] QSCD = {(byte) 0xad, (byte) 0xf2};
private static final byte[] authCert = {0x34, 0x01};
private static final byte[] signCert = {0x34, 0x1f};
private final IsoDep idCard;
private final byte[] keyEnc; private final byte[] keyEnc;
private final byte[] keyMAC; private final byte[] keyMAC;
private byte ssc; // Send sequence counter. private byte ssc; // Send sequence counter.
@ -81,12 +87,21 @@ public class Comms {
public Comms(IsoDep idCard, String CAN) throws IOException, NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException { public Comms(IsoDep idCard, String CAN) throws IOException, NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
idCard.connect(); idCard.connect();
this.idCard = idCard; this.idCard = idCard;
byte[][] keys = PACE(CAN.getBytes(StandardCharsets.UTF_8));
long start = System.currentTimeMillis();
byte[][] keys = PACE(CAN);
Log.i("Pace duration", String.valueOf(System.currentTimeMillis() - start));
keyEnc = keys[0]; keyEnc = keys[0];
keyMAC = keys[1]; keyMAC = keys[1];
} }
public byte[] getAuthenticationCertificate() {
return new byte[0];
}
/** /**
* Calculates the message authentication code * Calculates the message authentication code
* *
@ -139,51 +154,40 @@ public class Comms {
* @param CAN the card access number provided by the user * @param CAN the card access number provided by the user
* @return the decrypted nonce * @return the decrypted nonce
*/ */
private byte[] decryptNonce(byte[] encryptedNonce, byte[] CAN) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException { private byte[] decryptNonce(byte[] encryptedNonce, String CAN) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
byte[] decryptionKey = createKey(CAN, (byte) 3); byte[] decryptionKey = createKey(CAN.getBytes(StandardCharsets.UTF_8), (byte) 3);
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptionKey, "AES"), new IvParameterSpec(new byte[16])); cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptionKey, "AES"), new IvParameterSpec(new byte[16]));
return cipher.doFinal(encryptedNonce); return cipher.doFinal(encryptedNonce);
} }
/**
* Communicates with the card and logs the response
*
* @param APDU The command
* @param log Information for logging
* @return The response
*/
private byte[] getResponse(byte[] APDU, String log) throws IOException {
byte[] response = idCard.transceive(APDU);
if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
throw new RuntimeException(String.format("%s failed.", log));
}
Log.i(log, Hex.toHexString(response));
return response;
}
/** /**
* Attempts to use the PACE protocol to create a secure channel with an Estonian ID-card * Attempts to use the PACE protocol to create a secure channel with an Estonian ID-card
* *
* @param CAN the card access number * @param CAN the card access number
*/ */
private byte[][] PACE(byte[] CAN) throws IOException, NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException { private byte[][] PACE(String CAN) throws IOException, NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException {
// select the IAS-ECC application on the chip // select the ECC applet on the chip
getResponse(selectMaster, "Select the master application"); byte[] response = idCard.transceive(master);
Log.i("Select applet", Hex.toHexString(response));
// initiate PACE // initiate PACE
getResponse(MSESetAT, "Set authentication template"); response = idCard.transceive(MSESetAT);
Log.i("Authentication template", Hex.toHexString(response));
// get nonce // get nonce
byte[] response = getResponse(GAGetNonce, "Get nonce"); response = idCard.transceive(GAGetNonce);
Log.i("Get nonce", Hex.toHexString(response));
byte[] decryptedNonce = decryptNonce(Arrays.copyOfRange(response, 4, response.length - 2), CAN); byte[] decryptedNonce = decryptNonce(Arrays.copyOfRange(response, 4, response.length - 2), CAN);
// generate an EC keypair and exchange public keys with the chip // generate an EC keypair and exchange public keys with the chip
ECNamedCurveParameterSpec spec = ECNamedCurveTable.getParameterSpec("secp256r1"); ECNamedCurveParameterSpec spec = ECNamedCurveTable.getParameterSpec("secp256r1");
BigInteger privateKey = new BigInteger(255, new SecureRandom()).add(BigInteger.ONE); // should be in [1, spec.getN()-1], but this is good enough for this application BigInteger privateKey = new BigInteger(255, new SecureRandom()).add(BigInteger.ONE); // should be in [1, spec.getN()-1], but this is good enough for this application
ECPoint publicKey = spec.getG().multiply(privateKey).normalize(); ECPoint publicKey = spec.getG().multiply(privateKey).normalize();
response = getResponse(createAPDU(GAMapNonceIncomplete, publicKey.getEncoded(false), 66), "Map nonce"); byte[] APDU = createAPDU(GAMapNonceIncomplete, publicKey.getEncoded(false), 66);
response = idCard.transceive(APDU);
Log.i("Map nonce", Hex.toHexString(response));
ECPoint cardPublicKey = spec.getCurve().decodePoint(Arrays.copyOfRange(response, 4, 69)); ECPoint cardPublicKey = spec.getCurve().decodePoint(Arrays.copyOfRange(response, 4, 69));
// calculate the new base point, use it to generate a new keypair, and exchange public keys // calculate the new base point, use it to generate a new keypair, and exchange public keys
@ -191,41 +195,35 @@ public class Comms {
ECPoint mappedECBasePoint = spec.getG().multiply(new BigInteger(1, decryptedNonce)).add(sharedSecret).normalize(); ECPoint mappedECBasePoint = spec.getG().multiply(new BigInteger(1, decryptedNonce)).add(sharedSecret).normalize();
privateKey = new BigInteger(255, new SecureRandom()).add(BigInteger.ONE); privateKey = new BigInteger(255, new SecureRandom()).add(BigInteger.ONE);
publicKey = mappedECBasePoint.multiply(privateKey).normalize(); publicKey = mappedECBasePoint.multiply(privateKey).normalize();
response = getResponse(createAPDU(GAKeyAgreementIncomplete, publicKey.getEncoded(false), 66), "Key agreement"); APDU = createAPDU(GAKeyAgreementIncomplete, publicKey.getEncoded(false), 66);
response = idCard.transceive(APDU);
Log.i("Key agreement", Hex.toHexString(response));
cardPublicKey = spec.getCurve().decodePoint(Arrays.copyOfRange(response, 4, 69)); cardPublicKey = spec.getCurve().decodePoint(Arrays.copyOfRange(response, 4, 69));
// generate the session keys and exchange MACs to verify them // generate the session keys and exchange MACs to verify them
byte[] secret = cardPublicKey.multiply(privateKey).normalize().getAffineXCoord().getEncoded(); sharedSecret = cardPublicKey.multiply(privateKey).normalize();
byte[] keyEnc = createKey(secret, (byte) 1); byte[] encodedSecret = sharedSecret.getAffineXCoord().getEncoded();
byte[] keyMAC = createKey(secret, (byte) 2); byte[] keyEnc = createKey(encodedSecret, (byte) 1);
byte[] MAC = getMAC(createAPDU(dataForMACIncomplete, cardPublicKey.getEncoded(false), 65), keyMAC); byte[] keyMAC = createKey(encodedSecret, (byte) 2);
response = getResponse(createAPDU(GAMutualAuthenticationIncomplete, MAC, 9), "Mutual authentication"); APDU = createAPDU(dataForMACIncomplete, cardPublicKey.getEncoded(false), 65);
byte[] MAC = getMAC(APDU, keyMAC);
APDU = createAPDU(GAMutualAuthenticationIncomplete, MAC, 9);
response = idCard.transceive(APDU);
Log.i("Mutual authentication", Hex.toHexString(response));
// verify chip's MAC and return session keys // if the chip-side verification fails, crash and burn
MAC = getMAC(createAPDU(dataForMACIncomplete, publicKey.getEncoded(false), 65), keyMAC); if (response.length == 2) throw new InvalidCANException();
// otherwise verify chip's MAC and return session keys
APDU = createAPDU(dataForMACIncomplete, publicKey.getEncoded(false), 65);
MAC = getMAC(APDU, keyMAC);
if (!Hex.toHexString(response, 4, 8).equals(Hex.toHexString(MAC))) { if (!Hex.toHexString(response, 4, 8).equals(Hex.toHexString(MAC))) {
throw new RuntimeException("Could not verify chip's MAC."); // *Should* never happen. throw new AuthAppException("Could not verify chip's MAC.", 448); // Should never happen.
} }
return new byte[][]{keyEnc, keyMAC}; return new byte[][]{keyEnc, keyMAC};
} }
/**
* Selects a file and reads its contents
*
* @param FID file identifier of the required file
* @param info string for logging
* @return decrypted file contents
*/
private byte[] readFile(byte[] FID, String info) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
selectFile(FID, info);
byte[] response = getResponse(new byte[0], readFile, "Read binary");
if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
throw new RuntimeException(String.format("Could not read %s", info));
}
return encryptDecryptData(Arrays.copyOfRange(response, 3, 19), Cipher.DECRYPT_MODE);
}
/** /**
* Encrypts or decrypts the APDU data * Encrypts or decrypts the APDU data
* *
@ -260,182 +258,74 @@ public class Comms {
byte[] macData = new byte[data.length > 0 ? 48 + length : 48]; byte[] macData = new byte[data.length > 0 ? 48 + length : 48];
macData[15] = ssc; // first block contains the ssc macData[15] = ssc; // first block contains the ssc
System.arraycopy(incomplete, 0, macData, 16, 4); // second block has the command System.arraycopy(incomplete, 0, macData, 16, 4); // second block has the command
macData[20] = (byte) 0x80; // elements are terminated by 0x80 and zero-padded to the next block macData[20] = -128; // elements are terminated by 0x80 and zero-padded to the next block
System.arraycopy(incomplete, 5, macData, 32, 3); // third block contains appropriately encapsulated data/Le System.arraycopy(incomplete, 5, macData, 32, 3); // third block contains appropriately encapsulated data/Le
if (data.length > 0) { // if the APDU has data, add padding and encrypt it if (data.length > 0) { // if the APDU has data, add padding and encrypt it
byte[] paddedData = Arrays.copyOf(data, length); byte[] paddedData = Arrays.copyOf(data, length);
paddedData[data.length] = (byte) 0x80; paddedData[data.length] = -128;
encryptedData = encryptDecryptData(paddedData, Cipher.ENCRYPT_MODE); encryptedData = encryptDecryptData(paddedData, Cipher.ENCRYPT_MODE);
System.arraycopy(encryptedData, 0, macData, 35, encryptedData.length); System.arraycopy(encryptedData, 0, macData, 35, encryptedData.length);
} }
macData[35 + encryptedData.length] = (byte) 0x80; macData[35 + encryptedData.length] = -128;
byte[] MAC = getMAC(macData, keyMAC); byte[] MAC = getMAC(macData, keyMAC);
// construct the APDU using the encrypted data and the MAC // construct the APDU using the encrypted data and the MAC
byte[] APDU = Arrays.copyOf(incomplete, incomplete.length + encryptedData.length + MAC.length + 3); byte[] APDU = new byte[incomplete.length + encryptedData.length + MAC.length + 3];
System.arraycopy(incomplete, 0, APDU, 0, incomplete.length);
if (encryptedData.length > 0) { if (encryptedData.length > 0) {
System.arraycopy(encryptedData, 0, APDU, incomplete.length, encryptedData.length); System.arraycopy(encryptedData, 0, APDU, incomplete.length, encryptedData.length);
} }
System.arraycopy(new byte[]{(byte) 0x8E, 0x08}, 0, APDU, incomplete.length + encryptedData.length, 2); // MAC is encapsulated using the tag 0x8E System.arraycopy(new byte[]{-114, 8}, 0, APDU, incomplete.length + encryptedData.length, 2); // MAC is encapsulated using the tag 0x8E
System.arraycopy(MAC, 0, APDU, incomplete.length + encryptedData.length + 2, MAC.length); System.arraycopy(MAC, 0, APDU, incomplete.length + encryptedData.length + 2, MAC.length);
ssc++; ssc++;
return APDU; return APDU;
} }
/**
* Selects a FILE by its identifier
*
*/
private void selectFile(byte[] FID, String info) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
byte[] response = getResponse(FID, selectFile, String.format("Select %s", info));
if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
throw new RuntimeException(String.format("Could not select %s", info));
}
}
/** /**
* Gets the contents of the personal data dedicated file * Gets the contents of the personal data dedicated file
* *
* @param lastBytes the last bytes of the personal data file identifiers (0 < x < 16) * @param FID the last bytes of file identifiers being requested
* @return array containing the corresponding data strings * @return array containing the data strings
*
*/ */
public String[] readPersonalData(byte[] lastBytes) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException { public String[] readPersonalData(byte[] FID) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
String[] personalData = new String[lastBytes.length]; String[] personalData = new String[FID.length];
int stringIndex = 0; byte[] data;
byte[] APDU;
// select the master application byte[] response;
selectFile(IASECCFID, "the master application");
// select the personal data dedicated file // select the personal data dedicated file
selectFile(personalDF, "the personal data DF"); data = new byte[]{80, 0}; // personal data DF FID
APDU = createSecureAPDU(data, personal);
response = idCard.transceive(APDU);
Log.i("Select personal data DF", Hex.toHexString(response));
byte[] FID = Arrays.copyOf(personalDF, personalDF.length); // select and read the first 8 elementary files in the DF
// select and read the personal data elementary files for (int i = 0; i < FID.length; i++) {
for (byte index : lastBytes) {
if (index > 15 || index < 1) throw new RuntimeException("Invalid personal data FID."); byte index = FID[i];
FID[1] = index; if (index > 15 || index < 1) throw new AuthAppException("Invalid personal data FID.", 500);
data[1] = index;
APDU = createSecureAPDU(data, personal);
response = idCard.transceive(APDU);
Log.i(String.format("Select EF 500%d", index), Hex.toHexString(response));
APDU = createSecureAPDU(new byte[0], read);
response = idCard.transceive(APDU);
Log.i(String.format("Read binary EF 500%d", index), Hex.toHexString(response));
// store the decrypted datum // store the decrypted datum
byte[] response = readFile(FID, "a personal data EF"); byte[] raw = encryptDecryptData(Arrays.copyOfRange(response, 3, 19), Cipher.DECRYPT_MODE);
int indexOfTerminator = Hex.toHexString(response).lastIndexOf("80") / 2; int indexOfTerminator = Hex.toHexString(raw).lastIndexOf("80") / 2;
personalData[stringIndex++] = new String(Arrays.copyOfRange(response, 0, indexOfTerminator)); personalData[i] = new String(Arrays.copyOfRange(raw, 0, indexOfTerminator));
} }
return personalData; return personalData;
} }
/**
* Attempts to verify the selected PIN
*
* @param PIN user-provided PIN
* @param oneOrTwo true for PIN1, false for PIN2
*/
private void verifyPIN(byte[] PIN, boolean oneOrTwo) throws NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException {
selectFile(IASECCFID, "the master application");
if (!oneOrTwo) {
selectFile(QSCD, "the application");
}
// pad the PIN and use the chip for verification
byte[] paddedPIN = Hex.decode("ffffffffffffffffffffffff");
System.arraycopy(PIN, 0, paddedPIN, 0, PIN.length);
byte[] response = getResponse(paddedPIN, oneOrTwo ? verifyPIN1 : verifyPIN2, "PIN verification");
if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
if (response[response.length - 2] == 0x69 && response[response.length - 1] == (byte) 0x83) {
throw new RuntimeException("Invalid PIN. Authentication method blocked.");
} else {
throw new RuntimeException(String.format("Invalid PIN. Attempts left: %d.", response[response.length - 1] + 64));
}
}
}
/**
* Retrieves the authentication or signature certificate from the chip
*
* @param authOrSign true for auth, false for sign cert
* @return the requested certificate
*/
public byte[] getCertificate(boolean authOrSign) throws NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException {
selectFile(IASECCFID, "the master application");
selectFile(authOrSign ? AWP : QSCD, "the application");
selectFile(authOrSign ? authCert : signCert, "the certificate");
byte[] certificate = new byte[0];
byte[] readCert = Arrays.copyOf(readFile, readFile.length);
// Construct the certificate byte array n=indexOfTerminator bytes at a time
for (int i = 0; i < 16; i++) {
// Set the P1/P2 values to incrementally read the certificate
readCert[2] = (byte) (certificate.length / 256);
readCert[3] = (byte) (certificate.length % 256);
byte[] response = getResponse(new byte[0], readCert, "Read the certificate");
if (response[response.length - 2] == 0x6b && response[response.length - 1] == 0x00) {
throw new RuntimeException("Wrong read parameters.");
}
// Set the range containing a portion of the certificate and decrypt it
int start = response[2] == 1 ? 3 : 4;
int end = start + (response[start - 2] + 256) % 256 - 1;
byte[] decrypted = encryptDecryptData(Arrays.copyOfRange(response, start, end), Cipher.DECRYPT_MODE);
int indexOfTerminator = Hex.toHexString(decrypted).lastIndexOf("80") / 2;
certificate = Arrays.copyOf(certificate, certificate.length + indexOfTerminator);
System.arraycopy(decrypted, 0, certificate, certificate.length - indexOfTerminator, indexOfTerminator);
if (response[response.length - 2] == (byte) 0x90 && response[response.length - 1] == 0x00) {
break;
}
}
return certificate;
}
/**
* Signs the authentication token hash
*
* @param PIN1 PIN1
* @param token the token hash to be signed
* @return authentication token hash signature
*/
public byte[] authenticate(String PIN1, byte[] token) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
verifyPIN(PIN1.getBytes(StandardCharsets.UTF_8), true);
selectFile(AWP, "the AWP application");
byte[] response = getResponse(Env, MSESetEnv, "Set environment");
if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
throw new RuntimeException("Setting the environment failed.");
}
InternalAuthenticate[4] = (byte) (0x1d + 16 * (token.length / 16));
InternalAuthenticate[6] = (byte) (0x11 + 16 * (token.length / 16));
response = getResponse(token, InternalAuthenticate, "Internal Authenticate");
if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
throw new RuntimeException("Signing the token failed.");
}
byte[] signature = encryptDecryptData(Arrays.copyOfRange(response, 3, 115), Cipher.DECRYPT_MODE);
int indexOfTerminator = Hex.toHexString(signature).lastIndexOf("80") / 2;
return Arrays.copyOf(signature, indexOfTerminator);
}
private byte[] getResponse(byte[] data, byte[] command, String log) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
byte[] response = idCard.transceive(createSecureAPDU(data, command));
Log.i(log, Hex.toHexString(response));
return response;
}
} }