arti/Estonian-ID-card-mobile-authenticator-POC
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Add a method for verifying PIN1.

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This commit is contained in:
Lemmo Lavonen 2021-10-12 00:34:06 +03:00
parent 86c6a32032
commit d2ad8920a1
1 changed files with 92 additions and 38 deletions
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130
MobileAuthApp/app/src/main/java/com/tarkvaraprojekt/mobileauthapp/NFC/Comms.java
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@ -21,6 +21,7 @@ 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.Locale;
import javax.crypto.BadPaddingException; import javax.crypto.BadPaddingException;
import javax.crypto.Cipher; import javax.crypto.Cipher;
@ -30,7 +31,7 @@ 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 private static final byte[] selectMain = { // select IAS-ECC
0, -92, 4, 12, 16, -96, 0, 0, 0, 119, 1, 8, 0, 7, 0, 0, -2, 0, 0, 1, 0 0, -92, 4, 12, 16, -96, 0, 0, 0, 119, 1, 8, 0, 7, 0, 0, -2, 0, 0, 1, 0
}; };
@ -58,19 +59,31 @@ public class Comms {
127, 73, 79, 6, 10, 4, 0, 127, 0, 7, 2, 2, 4, 2, 4, -122, 65 127, 73, 79, 6, 10, 4, 0, 127, 0, 7, 2, 2, 4, 2, 4, -122, 65
}; };
private static final byte[] masterSec = { private static final byte[] selectAppSecure = {
12, -92, 4, 12, 45, -121, 33, 1 12, -92, 4, 12, 45, -121, 33, 1
}; };
private static final byte[] personal = { // select personal data DF private static final byte[] IASECCAID = { // Identification Authentication Signature - European Citizen Card Application Identifier
-96, 0, 0, 0, 119, 1, 8, 0, 7, 0, 0, -2, 0, 0, 1, 0
};
private static final byte[] QSCDAID = { // Qualified Signature Creation Device Application Identifier
81, 83, 67, 68, 32, 65, 112, 112, 108, 105, 99, 97, 116, 105, 111, 110
};
private static final byte[] selectFile = { //
12, -92, 1, 12, 29, -121, 17, 1 12, -92, 1, 12, 29, -121, 17, 1
}; };
private static final byte[] read = { // read binary private static final byte[] read = {
12, -80, 0, 0, 13, -105, 1, 0 12, -80, 0, 0, 13, -105, 1, 0
}; };
private IsoDep idCard; private static final byte[] verifyPIN1 = {
12, 32, 0, 1, 29, -121, 17, 1
};
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.
@ -95,10 +108,6 @@ public class Comms {
keyMAC = keys[1]; keyMAC = keys[1];
} }
public byte[] getAuthenticationCertificate() {
return new byte[0];
}
/** /**
* Calculates the message authentication code * Calculates the message authentication code
* *
@ -165,8 +174,8 @@ public class Comms {
*/ */
private byte[][] PACE(String CAN) throws IOException, NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException { private byte[][] PACE(String CAN) throws IOException, NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException {
// select the ECC applet on the chip // select the IAS-ECC application on the chip
byte[] response = idCard.transceive(master); byte[] response = idCard.transceive(selectMain);
Log.i("Select applet", Hex.toHexString(response)); Log.i("Select applet", Hex.toHexString(response));
// initiate PACE // initiate PACE
@ -221,6 +230,22 @@ public class Comms {
} }
/**
* Selects a file and reads its contents
*
* @param FID file identifier of the required file
* @return decrypted file contents
*/
private byte[] readFileByFID(byte[] FID) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
byte [] APDU = createSecureAPDU(FID, selectFile);
byte [] response = idCard.transceive(APDU);
Log.i(String.format("Select FID %s", Hex.toHexString(FID)), Hex.toHexString(response));
APDU = createSecureAPDU(new byte[0], read);
response = idCard.transceive(APDU);
Log.i("Read binary", Hex.toHexString(response));
return encryptDecryptData(Arrays.copyOfRange(response, 3, 19), Cipher.DECRYPT_MODE);
}
/** /**
* Encrypts or decrypts the APDU data * Encrypts or decrypts the APDU data
* *
@ -267,8 +292,7 @@ public class Comms {
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 = new byte[incomplete.length + encryptedData.length + MAC.length + 3]; byte[] APDU = Arrays.copyOf(incomplete, 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);
} }
@ -280,49 +304,79 @@ public class Comms {
} }
/**
* Selects the IAS ECC application, which provides the PKI functionalities, after a successful PACE.
*/
private void selectIASECCApplication() throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
byte[] APDU = createSecureAPDU(IASECCAID, selectAppSecure);
byte[] response = idCard.transceive(APDU);
Log.i("Select the main application", Hex.toHexString(response));
if (!Hex.toHexString(response, response.length - 2, 2).equals("9000")) {
throw new RuntimeException("Could not select IAS-ECC."); // *Should* never happen.
}
}
/** /**
* Gets the contents of the personal data dedicated file * Gets the contents of the personal data dedicated file
* *
* @param FID the last bytes of file identifiers being requested * @param lastBytes the last bytes of the personal data file identifiers (0 < x < 16)
* @return array containing the data strings * @return array containing the corresponding data strings
* *
*/ */
public String[] readPersonalData(byte[] FID) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException { public String[] readPersonalData(byte[] lastBytes) throws NoSuchPaddingException, InvalidKeyException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException, IOException {
String[] personalData = new String[FID.length]; String[] personalData = new String[lastBytes.length];
byte[] data; int stringIndex = 0;
byte[] APDU;
byte[] response; // select the application
selectIASECCApplication();
// select the personal data dedicated file // select the personal data dedicated file
data = new byte[]{80, 0}; // personal data DF FID byte[] FID = new byte[]{80, 0}; // personal data dedicated file FID
APDU = createSecureAPDU(data, personal); byte[] APDU = createSecureAPDU(FID, selectFile);
response = idCard.transceive(APDU); byte[] response = idCard.transceive(APDU);
Log.i("Select personal data DF", Hex.toHexString(response)); Log.i("Select personal data DF", Hex.toHexString(response));
// 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) {
byte index = FID[i];
if (index > 15 || index < 1) throw new RuntimeException("Invalid personal data FID."); if (index > 15 || index < 1) throw new RuntimeException("Invalid personal data FID.");
FID[1] = index;
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[] raw = encryptDecryptData(Arrays.copyOfRange(response, 3, 19), Cipher.DECRYPT_MODE); response = readFileByFID(FID);
int indexOfTerminator = Hex.toHexString(raw).lastIndexOf("80") / 2; int indexOfTerminator = Hex.toHexString(response).lastIndexOf("80") / 2;
personalData[i] = new String(Arrays.copyOfRange(raw, 0, indexOfTerminator)); personalData[stringIndex++] = new String(Arrays.copyOfRange(response, 0, indexOfTerminator));
} }
return personalData; return personalData;
} }
/**
* Attempts to verify the user-provided PIN1
*
* @param PIN1 byte array containing the PIN1
*/
private void verifyPIN1(byte[] PIN1) throws NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException {
selectIASECCApplication();
byte[] paddedPIN1 = new byte[]{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
System.arraycopy(PIN1, 0, paddedPIN1, 0, PIN1.length);
byte[] APDU = createSecureAPDU(paddedPIN1, verifyPIN1);
byte[] response = idCard.transceive(APDU);
Log.i("PIN1 verification", Hex.toHexString(response));
String sw1sw2 = Hex.toHexString(response, response.length - 2, 2);
if (!sw1sw2.equals("9000")) {
if (sw1sw2.equals("6983")) throw new RuntimeException("Invalid PIN1. Authentication method blocked.");
else throw new RuntimeException(String.format("Invalid PIN1. %c attempt%s left.", sw1sw2.charAt(sw1sw2.length() - 1), sw1sw2.endsWith("1") ? "" : "s"));
}
}
public byte[] getAuthenticationCertificate(String PIN1) throws NoSuchPaddingException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, IOException {
return new byte[0];
}
} }