mirror of
https://github.com/TanelOrumaa/Estonian-ID-card-mobile-authenticator-POC.git
synced 2024-12-22 04:20:16 +02:00
Merge remote-tracking branch 'origin/authJWT' into MOB-42
This commit is contained in:
TanelOrumaa
commit
44469b8533
@ -30,47 +30,43 @@ import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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public class Comms {
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private static final byte[] master = { // select Main AID
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0, -92, 4, 12, 16, -96, 0, 0, 0, 119, 1, 8, 0, 7, 0, 0, -2, 0, 0, 1, 0
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};
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private static final byte[] MSESetAT = { // manage security environment: set authentication template
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0, 34, -63, -92, 15, -128, 10, 4, 0, 127, 0, 7, 2, 2, 4, 2, 4, -125, 1, 2, 0
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};
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private static final byte[] selectMaster = Hex.decode("00a4040c10a000000077010800070000fe00000100");
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private static final byte[] GAGetNonce = { // general authenticate: get nonce
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16, -122, 0, 0, 2, 124, 0, 0
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};
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private static final byte[] MSESetAT = Hex.decode("0022c1a40f800a04007f0007020204020483010200");
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private static final byte[] GAMapNonceIncomplete = {
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16, -122, 0, 0, 69, 124, 67, -127, 65
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};
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private static final byte[] GAGetNonce = Hex.decode("10860000027c0000");
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private static final byte[] GAKeyAgreementIncomplete = {
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16, -122, 0, 0, 69, 124, 67, -125, 65
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};
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private static final byte[] GAMapNonceIncomplete = Hex.decode("10860000457c438141");
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private static final byte[] GAMutualAuthenticationIncomplete = {
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0, -122, 0, 0, 12, 124, 10, -123, 8
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};
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private static final byte[] GAKeyAgreementIncomplete = Hex.decode("10860000457c438341");
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private static final byte[] dataForMACIncomplete = {
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127, 73, 79, 6, 10, 4, 0, 127, 0, 7, 2, 2, 4, 2, 4, -122, 65
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};
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private static final byte[] GAMutualAuthenticationIncomplete = Hex.decode("008600000c7c0a8508");
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private static final byte[] masterSec = {
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12, -92, 4, 12, 45, -121, 33, 1
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};
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private static final byte[] dataForMACIncomplete = Hex.decode("7f494f060a04007f000702020402048641");
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private static final byte[] personal = { // select personal data DF
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12, -92, 1, 12, 29, -121, 17, 1
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};
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private static final byte[] selectFile = Hex.decode("0ca4010c1d871101");
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private static final byte[] read = { // read binary
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12, -80, 0, 0, 13, -105, 1, 0
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};
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private static final byte[] readFile = Hex.decode("0cb000000d970100");
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private IsoDep idCard;
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private static final byte[] verifyPIN1 = Hex.decode("0c2000011d871101");
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private static final byte[] verifyPIN2 = Hex.decode("0c2000851d871101");
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private static final byte[] MSESetEnv = Hex.decode("0c2241A41d871101");
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private static final byte[] Env = Hex.decode("8004FF200800840181");
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private static final byte[] InternalAuthenticate = Hex.decode("0c8800001d871101");
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private static final byte[] IASECCFID = {0x3f, 0x00};
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private static final byte[] personalDF = {0x50, 0x00};
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private static final byte[] AWP = {(byte) 0xad, (byte) 0xf1};
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private static final byte[] QSCD = {(byte) 0xad, (byte) 0xf2};
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private static final byte[] authCert = {0x34, 0x01};
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private static final byte[] signCert = {0x34, 0x1f};
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private final IsoDep idCard;
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private final byte[] keyEnc;
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private final byte[] keyMAC;
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private byte ssc; // Send sequence counter.
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@ -84,21 +80,12 @@ public class Comms {
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public Comms(IsoDep idCard, String CAN) throws IOException, NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
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idCard.connect();
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this.idCard = idCard;
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long start = System.currentTimeMillis();
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byte[][] keys = PACE(CAN);
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Log.i("Pace duration", String.valueOf(System.currentTimeMillis() - start));
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byte[][] keys = PACE(CAN.getBytes(StandardCharsets.UTF_8));
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keyEnc = keys[0];
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keyMAC = keys[1];
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}
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public byte[] getAuthenticationCertificate() {
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return new byte[0];
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}
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/**
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* Calculates the message authentication code
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*
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@ -151,40 +138,51 @@ public class Comms {
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* @param CAN the card access number provided by the user
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* @return the decrypted nonce
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*/
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private byte[] decryptNonce(byte[] encryptedNonce, String CAN) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
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byte[] decryptionKey = createKey(CAN.getBytes(StandardCharsets.UTF_8), (byte) 3);
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private byte[] decryptNonce(byte[] encryptedNonce, byte[] CAN) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
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byte[] decryptionKey = createKey(CAN, (byte) 3);
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Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
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cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptionKey, "AES"), new IvParameterSpec(new byte[16]));
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return cipher.doFinal(encryptedNonce);
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}
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/**
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* Communicates with the card and logs the response
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*
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* @param APDU The command
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* @param log Information for logging
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* @return The response
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*/
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private byte[] getResponse(byte[] APDU, String log) throws IOException {
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byte[] response = idCard.transceive(APDU);
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if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
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throw new RuntimeException(String.format("%s failed.", log));
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}
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Log.i(log, Hex.toHexString(response));
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return response;
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}
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/**
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* Attempts to use the PACE protocol to create a secure channel with an Estonian ID-card
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*
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* @param CAN the card access number
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*/
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private byte[][] PACE(String CAN) throws IOException, NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException {
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private byte[][] PACE(byte[] CAN) throws IOException, NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException {
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// select the ECC applet on the chip
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byte[] response = idCard.transceive(master);
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Log.i("Select applet", Hex.toHexString(response));
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// select the IAS-ECC application on the chip
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getResponse(selectMaster, "Select the master application");
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// initiate PACE
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response = idCard.transceive(MSESetAT);
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Log.i("Authentication template", Hex.toHexString(response));
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getResponse(MSESetAT, "Set authentication template");
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// get nonce
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response = idCard.transceive(GAGetNonce);
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Log.i("Get nonce", Hex.toHexString(response));
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byte[] response = getResponse(GAGetNonce, "Get nonce");
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byte[] decryptedNonce = decryptNonce(Arrays.copyOfRange(response, 4, response.length - 2), CAN);
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// generate an EC keypair and exchange public keys with the chip
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ECNamedCurveParameterSpec spec = ECNamedCurveTable.getParameterSpec("secp256r1");
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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
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ECPoint publicKey = spec.getG().multiply(privateKey).normalize();
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byte[] APDU = createAPDU(GAMapNonceIncomplete, publicKey.getEncoded(false), 66);
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response = idCard.transceive(APDU);
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Log.i("Map nonce", Hex.toHexString(response));
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response = getResponse(createAPDU(GAMapNonceIncomplete, publicKey.getEncoded(false), 66), "Map nonce");
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ECPoint cardPublicKey = spec.getCurve().decodePoint(Arrays.copyOfRange(response, 4, 69));
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// calculate the new base point, use it to generate a new keypair, and exchange public keys
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@ -192,35 +190,41 @@ public class Comms {
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ECPoint mappedECBasePoint = spec.getG().multiply(new BigInteger(1, decryptedNonce)).add(sharedSecret).normalize();
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privateKey = new BigInteger(255, new SecureRandom()).add(BigInteger.ONE);
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publicKey = mappedECBasePoint.multiply(privateKey).normalize();
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APDU = createAPDU(GAKeyAgreementIncomplete, publicKey.getEncoded(false), 66);
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response = idCard.transceive(APDU);
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Log.i("Key agreement", Hex.toHexString(response));
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response = getResponse(createAPDU(GAKeyAgreementIncomplete, publicKey.getEncoded(false), 66), "Key agreement");
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cardPublicKey = spec.getCurve().decodePoint(Arrays.copyOfRange(response, 4, 69));
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// generate the session keys and exchange MACs to verify them
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sharedSecret = cardPublicKey.multiply(privateKey).normalize();
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byte[] encodedSecret = sharedSecret.getAffineXCoord().getEncoded();
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byte[] keyEnc = createKey(encodedSecret, (byte) 1);
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byte[] keyMAC = createKey(encodedSecret, (byte) 2);
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APDU = createAPDU(dataForMACIncomplete, cardPublicKey.getEncoded(false), 65);
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byte[] MAC = getMAC(APDU, keyMAC);
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APDU = createAPDU(GAMutualAuthenticationIncomplete, MAC, 9);
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response = idCard.transceive(APDU);
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Log.i("Mutual authentication", Hex.toHexString(response));
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byte[] secret = cardPublicKey.multiply(privateKey).normalize().getAffineXCoord().getEncoded();
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byte[] keyEnc = createKey(secret, (byte) 1);
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byte[] keyMAC = createKey(secret, (byte) 2);
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byte[] MAC = getMAC(createAPDU(dataForMACIncomplete, cardPublicKey.getEncoded(false), 65), keyMAC);
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response = getResponse(createAPDU(GAMutualAuthenticationIncomplete, MAC, 9), "Mutual authentication");
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// if the chip-side verification fails, crash and burn
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if (response.length == 2) throw new RuntimeException("Invalid CAN.");
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// otherwise verify chip's MAC and return session keys
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APDU = createAPDU(dataForMACIncomplete, publicKey.getEncoded(false), 65);
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MAC = getMAC(APDU, keyMAC);
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// verify chip's MAC and return session keys
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MAC = getMAC(createAPDU(dataForMACIncomplete, publicKey.getEncoded(false), 65), keyMAC);
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if (!Hex.toHexString(response, 4, 8).equals(Hex.toHexString(MAC))) {
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throw new RuntimeException("Could not verify chip's MAC."); // Should never happen.
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throw new RuntimeException("Could not verify chip's MAC."); // *Should* never happen.
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}
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return new byte[][]{keyEnc, keyMAC};
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}
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/**
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* Selects a file and reads its contents
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*
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* @param FID file identifier of the required file
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* @param info string for logging
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* @return decrypted file contents
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*/
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private byte[] readFile(byte[] FID, String info) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
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selectFile(FID, info);
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byte[] response = getResponse(new byte[0], readFile, "Read binary");
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if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
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throw new RuntimeException(String.format("Could not read %s", info));
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}
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return encryptDecryptData(Arrays.copyOfRange(response, 3, 19), Cipher.DECRYPT_MODE);
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}
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/**
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* Encrypts or decrypts the APDU data
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*
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@ -255,74 +259,180 @@ public class Comms {
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byte[] macData = new byte[data.length > 0 ? 48 + length : 48];
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macData[15] = ssc; // first block contains the ssc
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System.arraycopy(incomplete, 0, macData, 16, 4); // second block has the command
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macData[20] = -128; // elements are terminated by 0x80 and zero-padded to the next block
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macData[20] = (byte) 0x80; // elements are terminated by 0x80 and zero-padded to the next block
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System.arraycopy(incomplete, 5, macData, 32, 3); // third block contains appropriately encapsulated data/Le
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if (data.length > 0) { // if the APDU has data, add padding and encrypt it
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byte[] paddedData = Arrays.copyOf(data, length);
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paddedData[data.length] = -128;
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paddedData[data.length] = (byte) 0x80;
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encryptedData = encryptDecryptData(paddedData, Cipher.ENCRYPT_MODE);
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System.arraycopy(encryptedData, 0, macData, 35, encryptedData.length);
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}
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macData[35 + encryptedData.length] = -128;
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macData[35 + encryptedData.length] = (byte) 0x80;
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byte[] MAC = getMAC(macData, keyMAC);
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// construct the APDU using the encrypted data and the MAC
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byte[] APDU = new byte[incomplete.length + encryptedData.length + MAC.length + 3];
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System.arraycopy(incomplete, 0, APDU, 0, incomplete.length);
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byte[] APDU = Arrays.copyOf(incomplete, incomplete.length + encryptedData.length + MAC.length + 3);
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if (encryptedData.length > 0) {
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System.arraycopy(encryptedData, 0, APDU, incomplete.length, encryptedData.length);
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}
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System.arraycopy(new byte[]{-114, 8}, 0, APDU, incomplete.length + encryptedData.length, 2); // MAC is encapsulated using the tag 0x8E
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System.arraycopy(new byte[]{(byte) 0x8E, 0x08}, 0, APDU, incomplete.length + encryptedData.length, 2); // MAC is encapsulated using the tag 0x8E
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System.arraycopy(MAC, 0, APDU, incomplete.length + encryptedData.length + 2, MAC.length);
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ssc++;
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return APDU;
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}
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/**
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* Gets the contents of the personal data dedicated file
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*
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* @param FID the last bytes of file identifiers being requested
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* @return array containing the data strings
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* Selects a FILE by its identifier
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*
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*/
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public String[] readPersonalData(byte[] FID) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
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private void selectFile(byte[] FID, String info) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
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byte[] response = getResponse(FID, selectFile, String.format("Select %s", info));
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if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
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throw new RuntimeException(String.format("Could not select %s", info));
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}
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}
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String[] personalData = new String[FID.length];
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byte[] data;
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byte[] APDU;
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byte[] response;
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/**
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* Gets the contents of the personal data dedicated file
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*
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* @param lastBytes the last bytes of the personal data file identifiers (0 < x < 16)
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* @return array containing the corresponding data strings
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*/
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public String[] readPersonalData(byte[] lastBytes) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
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String[] personalData = new String[lastBytes.length];
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int stringIndex = 0;
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// select the master application
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selectFile(IASECCFID, "the master application");
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// select the personal data dedicated file
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data = new byte[]{80, 0}; // personal data DF FID
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APDU = createSecureAPDU(data, personal);
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response = idCard.transceive(APDU);
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Log.i("Select personal data DF", Hex.toHexString(response));
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selectFile(personalDF, "the personal data DF");
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// select and read the first 8 elementary files in the DF
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for (int i = 0; i < FID.length; i++) {
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byte[] FID = Arrays.copyOf(personalDF, personalDF.length);
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// select and read the personal data elementary files
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for (byte index : lastBytes) {
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byte index = FID[i];
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if (index > 15 || index < 1) throw new RuntimeException("Invalid personal data FID.");
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data[1] = index;
|
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APDU = createSecureAPDU(data, personal);
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response = idCard.transceive(APDU);
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Log.i(String.format("Select EF 500%d", index), Hex.toHexString(response));
|
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|
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APDU = createSecureAPDU(new byte[0], read);
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response = idCard.transceive(APDU);
|
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Log.i(String.format("Read binary EF 500%d", index), Hex.toHexString(response));
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FID[1] = index;
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// store the decrypted datum
|
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byte[] raw = encryptDecryptData(Arrays.copyOfRange(response, 3, 19), Cipher.DECRYPT_MODE);
|
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int indexOfTerminator = Hex.toHexString(raw).lastIndexOf("80") / 2;
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personalData[i] = new String(Arrays.copyOfRange(raw, 0, indexOfTerminator));
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byte[] response = readFile(FID, "a personal data EF");
|
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int indexOfTerminator = Hex.toHexString(response).lastIndexOf("80") / 2;
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personalData[stringIndex++] = new String(Arrays.copyOfRange(response, 0, indexOfTerminator));
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|
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}
|
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|
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return personalData;
|
||||
|
||||
}
|
||||
|
||||
/**
|
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* Attempts to verify the selected PIN
|
||||
*
|
||||
* @param PIN user-provided PIN
|
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* @param oneOrTwo true for PIN1, false for PIN2
|
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*/
|
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private void verifyPIN(byte[] PIN, boolean oneOrTwo) throws NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException {
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|
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selectFile(IASECCFID, "the master application");
|
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if (!oneOrTwo) {
|
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selectFile(QSCD, "the application");
|
||||
}
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|
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// pad the PIN and use the chip for verification
|
||||
byte[] paddedPIN = Hex.decode("ffffffffffffffffffffffff");
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System.arraycopy(PIN, 0, paddedPIN, 0, PIN.length);
|
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byte[] response = getResponse(paddedPIN, oneOrTwo ? verifyPIN1 : verifyPIN2, "PIN verification");
|
||||
|
||||
if (response[response.length - 2] != (byte) 0x90 || response[response.length - 1] != 0x00) {
|
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if (response[response.length - 2] == 0x69 && response[response.length - 1] == (byte) 0x83) {
|
||||
throw new RuntimeException("Invalid PIN. Authentication method blocked.");
|
||||
} else {
|
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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;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -9,7 +9,7 @@ class Authenticator(val comms : Comms) {
|
||||
public fun authenticate(nonce: BigInteger, challengeUrl: String, pin1: String) {
|
||||
|
||||
// Ask PIN 1 from the user and get the authentication certificate from the ID card.
|
||||
val authenticationCertificate : ByteArray = comms.getAuthenticationCertificate();
|
||||
val authenticationCertificate : ByteArray = comms.getCertificate(true);
|
||||
|
||||
// Create the authentication token (OpenID X509)
|
||||
|
||||
|
||||
@ -9,7 +9,7 @@ buildscript {
|
||||
kotlin_version = "1.4.30"
|
||||
}
|
||||
dependencies {
|
||||
classpath "com.android.tools.build:gradle:7.0.2"
|
||||
classpath 'com.android.tools.build:gradle:7.0.3'
|
||||
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.20"
|
||||
classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version"
|
||||
// NOTE: Do not place your application dependencies here; they belong
|
||||
|
||||
Loading…
Reference in New Issue
Block a user