diff options
Diffstat (limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcIntentActivity.java')
-rw-r--r-- | OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcIntentActivity.java | 313 |
1 files changed, 0 insertions, 313 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcIntentActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcIntentActivity.java deleted file mode 100644 index 0ccb206d1..000000000 --- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcIntentActivity.java +++ /dev/null @@ -1,313 +0,0 @@ -/** - * Copyright (c) 2013-2014 Philipp Jakubeit, Signe Rüsch, Dominik Schürmann - * - * Licensed under the Bouncy Castle License (MIT license). See LICENSE file for details. - */ - -package org.sufficientlysecure.keychain.ui; - -import android.annotation.TargetApi; -import android.app.PendingIntent; -import android.content.Intent; -import android.content.IntentFilter; -import android.nfc.NfcAdapter; -import android.nfc.Tag; -import android.nfc.tech.IsoDep; -import android.os.Build; -import android.os.Bundle; -import android.view.WindowManager; -import android.widget.Toast; - -import org.spongycastle.util.encoders.Hex; -import org.sufficientlysecure.keychain.Constants; -import org.sufficientlysecure.keychain.R; -import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; -import org.sufficientlysecure.keychain.util.Iso7816TLV; -import org.sufficientlysecure.keychain.util.Log; - -import java.io.IOException; -import java.nio.ByteBuffer; - -/** - * This class provides a communication interface to OpenPGP applications on ISO SmartCard compliant - * NFC devices. - * - * For the full specs, see http://g10code.com/docs/openpgp-card-2.0.pdf - */ -@TargetApi(Build.VERSION_CODES.GINGERBREAD_MR1) -public class NfcIntentActivity extends BaseActivity { - - // special extra for OpenPgpService - public static final String EXTRA_DATA = "data"; - - private Intent mServiceIntent; - - private static final int TIMEOUT = 100000; - - private NfcAdapter mNfcAdapter; - - @Override - protected void onCreate(Bundle savedInstanceState) { - super.onCreate(savedInstanceState); - Log.d(Constants.TAG, "NfcActivity.onCreate"); - - getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); - - Intent intent = getIntent(); - Bundle data = intent.getExtras(); - String action = intent.getAction(); - - Log.d(Constants.TAG, action); - Log.d(Constants.TAG, intent.getDataString()); - - // TODO check fingerprint - // mFingerprint = data.getByteArray(EXTRA_FINGERPRINT); - - if (!NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) { - Log.d(Constants.TAG, "Action not supported: " + action); - finish(); - } - - try { - Tag detectedTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG); - - // Connect to the detected tag, setting a couple of settings - IsoDep isoDep = IsoDep.get(detectedTag); - isoDep.setTimeout(TIMEOUT); // timeout is set to 100 seconds to avoid cancellation during calculation - isoDep.connect(); - - nfcGreet(isoDep); - // nfcPin(isoDep, "yoloswag"); - nfcGetFingerprint(isoDep); - - } catch (IOException e) { - Log.e(Constants.TAG, "IOException!", e); - finish(); - } - } - - @Override - protected void initLayout() { - setContentView(R.layout.nfc_activity); - } - - /** - * Called when the system is about to start resuming a previous activity, - * disables NFC Foreground Dispatch - */ - public void onPause() { - super.onPause(); - Log.d(Constants.TAG, "NfcActivity.onPause"); - - // disableNfcForegroundDispatch(); - } - - /** - * Called when the activity will start interacting with the user, - * enables NFC Foreground Dispatch - */ - public void onResume() { - super.onResume(); - Log.d(Constants.TAG, "NfcActivity.onResume"); - - // enableNfcForegroundDispatch(); - } - - /** Handle NFC communication and return a result. - * - * This method is called by onNewIntent above upon discovery of an NFC tag. - * It handles initialization and login to the application, subsequently - * calls either nfcCalculateSignature() or nfcDecryptSessionKey(), then - * finishes the activity with an appropiate result. - * - * On general communication, see also - * http://www.cardwerk.com/smartcards/smartcard_standard_ISO7816-4_annex-a.aspx - * - * References to pages are generally related to the OpenPGP Application - * on ISO SmartCard Systems specification. - * - */ - private void nfcGreet(IsoDep isoDep) throws IOException { - - // SW1/2 0x9000 is the generic "ok" response, which we expect most of the time. - // See specification, page 51 - String accepted = "9000"; - - // Command APDU (page 51) for SELECT FILE command (page 29) - String opening = - "00" // CLA - + "A4" // INS - + "04" // P1 - + "00" // P2 - + "06" // Lc (number of bytes) - + "D27600012401" // Data (6 bytes) - + "00"; // Le - if (!card(isoDep, opening).equals(accepted)) { // activate connection - toast("Opening Error!"); - setResult(RESULT_CANCELED, mServiceIntent); - finish(); - } - } - - private void nfcPin(IsoDep isoDep, String pin) throws IOException { - - String data = "00CA006E00"; - String fingerprint = card(isoDep, data); - - // Command APDU for VERIFY command (page 32) - String login = - "00" // CLA - + "20" // INS - + "00" // P1 - + "82" // P2 (PW1) - + String.format("%02x", pin.length()) // Lc - + Hex.toHexString(pin.getBytes()); - if ( ! card(isoDep, login).equals("9000")) { // login - toast("Pin Error!"); - setResult(RESULT_CANCELED, mServiceIntent); - finish(); - } - - } - - /** - * Gets the user ID - * - * @return the user id as "name <email>" - * @throws java.io.IOException - */ - public static String getUserId(IsoDep isoDep) throws IOException { - String info = "00CA006500"; - String data = "00CA005E00"; - return getName(card(isoDep, info)) + " <" + (new String(Hex.decode(getDataField(card(isoDep, data))))) + ">"; - } - - /** - * Gets the long key ID - * - * @return the long key id (last 16 bytes of the fingerprint) - * @throws java.io.IOException - */ - public static long getKeyId(IsoDep isoDep) throws IOException { - String keyId = nfcGetFingerprint(isoDep).substring(24); - Log.d(Constants.TAG, "keyId: " + keyId); - return Long.parseLong(keyId, 16); - } - - /** - * Gets the fingerprint of the signature key - * - * @return the fingerprint - * @throws java.io.IOException - */ - public static String nfcGetFingerprint(IsoDep isoDep) throws IOException { - String data = "00CA006E00"; - byte[] buf = isoDep.transceive(Hex.decode(data)); - - Iso7816TLV tlv = Iso7816TLV.readSingle(buf, true); - Log.d(Constants.TAG, "nfc tlv data:\n" + tlv.prettyPrint()); - - Iso7816TLV fptlv = Iso7816TLV.findRecursive(tlv, 0xc5); - if (fptlv != null) { - ByteBuffer fpbuf = ByteBuffer.wrap(fptlv.mV); - byte[] fp = new byte[20]; - fpbuf.get(fp); - Log.d(Constants.TAG, "fingerprint 1: " + KeyFormattingUtils.convertFingerprintToHex(fp)); - fpbuf.get(fp); - Log.d(Constants.TAG, "fingerprint 2: " + KeyFormattingUtils.convertFingerprintToHex(fp)); - fpbuf.get(fp); - Log.d(Constants.TAG, "fingerprint 3: " + KeyFormattingUtils.convertFingerprintToHex(fp)); - } - - return "nope"; - } - - /** - * Prints a message to the screen - * - * @param text the text which should be contained within the toast - */ - private void toast(String text) { - Toast.makeText(this, text, Toast.LENGTH_LONG).show(); - } - - /** - * Receive new NFC Intents to this activity only by enabling foreground dispatch. - * This can only be done in onResume! - */ - public void enableNfcForegroundDispatch() { - mNfcAdapter = NfcAdapter.getDefaultAdapter(this); - Intent nfcI = new Intent(this, NfcIntentActivity.class) - .addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP); - PendingIntent nfcPendingIntent = PendingIntent.getActivity(this, 0, nfcI, 0); - IntentFilter[] writeTagFilters = new IntentFilter[]{ - new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED) - }; - - // https://code.google.com/p/android/issues/detail?id=62918 - // maybe mNfcAdapter.enableReaderMode(); ? - try { - mNfcAdapter.enableForegroundDispatch(this, nfcPendingIntent, writeTagFilters, null); - } catch (IllegalStateException e) { - Log.i(Constants.TAG, "NfcForegroundDispatch Error!", e); - } - Log.d(Constants.TAG, "NfcForegroundDispatch has been enabled!"); - } - - /** - * Disable foreground dispatch in onPause! - */ - public void disableNfcForegroundDispatch() { - mNfcAdapter.disableForegroundDispatch(this); - Log.d(Constants.TAG, "NfcForegroundDispatch has been disabled!"); - } - - /** - * Gets the name of the user out of the raw card output regarding card holder related data - * - * @param name the raw card holder related data from the card - * @return the name given in this data - */ - public static String getName(String name) { - String slength; - int ilength; - name = name.substring(6); - slength = name.substring(0, 2); - ilength = Integer.parseInt(slength, 16) * 2; - name = name.substring(2, ilength + 2); - name = (new String(Hex.decode(name))).replace('<', ' '); - return (name); - } - - /** - * Reduces the raw data from the card by four characters - * - * @param output the raw data from the card - * @return the data field of that data - */ - private static String getDataField(String output) { - return output.substring(0, output.length() - 4); - } - - /** - * Communicates with the OpenPgpCard via the APDU - * - * @param hex the hexadecimal APDU - * @return The answer from the card - * @throws java.io.IOException throws an exception if something goes wrong - */ - public static String card(IsoDep isoDep, String hex) throws IOException { - return getHex(isoDep.transceive(Hex.decode(hex))); - } - - /** - * Converts a byte array into an hex string - * - * @param raw the byte array representation - * @return the hexadecimal string representation - */ - public static String getHex(byte[] raw) { - return new String(Hex.encode(raw)); - } - -} |