first steps toward yubikey activity

- move BaseActivity into new package
- extract BaseNfcActivity from NfcOperationsActivity
This commit is contained in:
Vincent Breitmoser 2015-03-21 17:13:31 +01:00
parent 9ef2795fcd
commit 147003123f
30 changed files with 689 additions and 468 deletions

View File

@ -31,7 +31,7 @@ import org.sufficientlysecure.keychain.operations.results.OperationResult.LogTyp
import org.sufficientlysecure.keychain.operations.results.SingletonResult;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.remote.AccountSettings;
import org.sufficientlysecure.keychain.ui.BaseActivity;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Log;
public class AccountSettingsActivity extends BaseActivity {

View File

@ -40,9 +40,7 @@ import org.sufficientlysecure.keychain.operations.results.OperationResult;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.remote.AppSettings;
import org.sufficientlysecure.keychain.service.SaveKeyringParcel;
import org.sufficientlysecure.keychain.ui.BaseActivity;
import org.sufficientlysecure.keychain.ui.dialog.AddSubkeyDialogFragment;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.dialog.AdvancedAppSettingsDialogFragment;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -38,7 +38,7 @@ import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.remote.AccountSettings;
import org.sufficientlysecure.keychain.remote.AppSettings;
import org.sufficientlysecure.keychain.ui.BaseActivity;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.SelectPublicKeyFragment;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -29,7 +29,7 @@ import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.operations.results.OperationResult;
import org.sufficientlysecure.keychain.pgp.KeyRing;
import org.sufficientlysecure.keychain.ui.BaseActivity;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.CreateKeyActivity;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -23,6 +23,7 @@ import android.view.View;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Log;
public class CertifyFingerprintActivity extends BaseActivity {

View File

@ -19,6 +19,8 @@
package org.sufficientlysecure.keychain.ui;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
/**
* Signs the specified public key with the specified secret master key

View File

@ -17,12 +17,18 @@
package org.sufficientlysecure.keychain.ui;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.IntentFilter;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Passphrase;
import java.util.ArrayList;

View File

@ -78,7 +78,7 @@ public class CreateKeyStartFragment extends Fragment {
mCreateKey = view.findViewById(R.id.create_key_create_key_button);
mImportKey = view.findViewById(R.id.create_key_import_button);
// mYubiKey = view.findViewById(R.id.create_key_yubikey_button);
mYubiKey = view.findViewById(R.id.create_key_yubikey_button);
mCancel = (TextView) view.findViewById(R.id.create_key_cancel);
if (mCreateKeyActivity.mFirstTime) {
@ -95,6 +95,14 @@ public class CreateKeyStartFragment extends Fragment {
}
});
mYubiKey.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
CreateKeyYubiFragment frag = new CreateKeyYubiFragment();
mCreateKeyActivity.loadFragment(frag, FragAction.TO_RIGHT);
}
});
mImportKey.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

View File

@ -0,0 +1,90 @@
/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.CreateKeyActivity.FragAction;
import org.sufficientlysecure.keychain.ui.widget.NameEditText;
public class CreateKeyYubiFragment extends Fragment {
CreateKeyActivity mCreateKeyActivity;
NameEditText mNameEdit;
View mBackButton;
View mNextButton;
private static boolean isEditTextNotEmpty(Context context, EditText editText) {
boolean output = true;
if (editText.getText().length() == 0) {
editText.setError(context.getString(R.string.create_key_empty));
editText.requestFocus();
output = false;
} else {
editText.setError(null);
}
return output;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.create_yubikey_fragment, container, false);
mBackButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mCreateKeyActivity.loadFragment(null, FragAction.TO_LEFT);
}
});
mNextButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
nextClicked();
}
});
return view;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
mCreateKeyActivity = (CreateKeyActivity) getActivity();
}
private void nextClicked() {
if (isEditTextNotEmpty(getActivity(), mNameEdit)) {
// save state
mCreateKeyActivity.mName = mNameEdit.getText().toString();
CreateKeyEmailFragment frag = CreateKeyEmailFragment.newInstance();
mCreateKeyActivity.loadFragment(frag, FragAction.TO_RIGHT);
}
}
}

View File

@ -21,12 +21,12 @@ import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.view.View;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.api.OpenKeychainIntents;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Log;
public class DecryptFilesActivity extends BaseActivity {

View File

@ -31,6 +31,7 @@ import org.sufficientlysecure.keychain.compatibility.ClipboardReflection;
import org.sufficientlysecure.keychain.operations.results.OperationResult;
import org.sufficientlysecure.keychain.operations.results.SingletonResult;
import org.sufficientlysecure.keychain.pgp.PgpHelper;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -23,6 +23,7 @@ import android.os.Bundle;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.service.SaveKeyringParcel;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Log;
public class EditKeyActivity extends BaseActivity {

View File

@ -33,6 +33,7 @@ import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
import org.sufficientlysecure.keychain.service.input.RequiredInputParcel;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Passphrase;

View File

@ -26,6 +26,8 @@ import com.astuetz.PagerSlidingTabStrip;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.adapter.PagerTabStripAdapter;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
public class HelpActivity extends BaseActivity {
public static final String EXTRA_SELECTED_TAB = "selected_tab";

View File

@ -37,6 +37,7 @@ import org.sufficientlysecure.keychain.operations.results.ImportKeyResult;
import org.sufficientlysecure.keychain.operations.results.OperationResult;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -22,6 +22,8 @@ import android.os.Bundle;
import android.view.View;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
public class LogDisplayActivity extends BaseActivity {

View File

@ -22,6 +22,7 @@ import org.spongycastle.bcpg.HashAlgorithmTags;
import org.spongycastle.util.encoders.Hex;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Iso7816TLV;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -21,6 +21,7 @@ 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.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.util.Iso7816TLV;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -7,31 +7,19 @@
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.bcpg.HashAlgorithmTags;
import org.spongycastle.util.encoders.Hex;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
import org.sufficientlysecure.keychain.service.input.RequiredInputParcel;
import org.sufficientlysecure.keychain.util.Iso7816TLV;
import org.sufficientlysecure.keychain.ui.base.BaseNfcActivity;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Passphrase;
import org.sufficientlysecure.keychain.util.Preferences;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* This class provides a communication interface to OpenPGP applications on ISO SmartCard compliant
@ -40,21 +28,13 @@ import java.nio.ByteBuffer;
* For the full specs, see http://g10code.com/docs/openpgp-card-2.0.pdf
*/
@TargetApi(Build.VERSION_CODES.GINGERBREAD_MR1)
public class NfcOperationActivity extends BaseActivity {
public static final int REQUEST_CODE_PASSPHRASE = 1;
public class NfcOperationActivity extends BaseNfcActivity {
public static final String EXTRA_REQUIRED_INPUT = "required_input";
public static final String RESULT_DATA = "result_data";
private static final int TIMEOUT = 100000;
private NfcAdapter mNfcAdapter;
private IsoDep mIsoDep;
RequiredInputParcel mRequiredInput;
private Passphrase mPin;
@Override
protected void onCreate(Bundle savedInstanceState) {
@ -64,45 +44,12 @@ public class NfcOperationActivity extends BaseActivity {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
Intent intent = getIntent();
String action = intent.getAction();
if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)) {
throw new AssertionError("should not happen: NfcOperationActivity.onCreate is called instead of onNewIntent!");
}
Bundle data = intent.getExtras();
mRequiredInput = data.getParcelable(EXTRA_REQUIRED_INPUT);
obtainPassphrase();
}
private void obtainPassphrase() {
Preferences prefs = Preferences.getPreferences(this);
if (prefs.useDefaultYubikeyPin()) {
mPin = new Passphrase("123456");
return;
}
Intent intent = new Intent(this, PassphraseDialogActivity.class);
intent.putExtra(PassphraseDialogActivity.EXTRA_REQUIRED_INPUT,
RequiredInputParcel.createRequiredPassphrase(mRequiredInput));
startActivityForResult(intent, REQUEST_CODE_PASSPHRASE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CODE_PASSPHRASE:
CryptoInputParcel input = data.getParcelableExtra(PassphraseDialogActivity.RESULT_DATA);
mPin = input.getPassphrase();
break;
default:
super.onActivityResult(requestCode, resultCode, data);
}
// obtain passphrase for this subkey
obtainYubikeyPin(RequiredInputParcel.createRequiredPassphrase(mRequiredInput));
}
@Override
@ -110,104 +57,8 @@ public class NfcOperationActivity extends BaseActivity {
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, "NfcOperationActivity.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, "NfcOperationActivity.onResume");
enableNfcForegroundDispatch();
}
/**
* This activity is started as a singleTop activity.
* All new NFC Intents which are delivered to this activity are handled here
*/
public void onNewIntent(Intent intent) {
if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {
try {
handleNdefDiscoveredIntent(intent);
} catch (IOException e) {
Log.e(Constants.TAG, "Connection error!", e);
toast("Connection Error: " + e.getMessage());
setResult(RESULT_CANCELED);
finish();
}
}
}
/** 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 handleNdefDiscoveredIntent(Intent intent) throws IOException {
Tag detectedTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
// Connect to the detected tag, setting a couple of settings
mIsoDep = IsoDep.get(detectedTag);
mIsoDep.setTimeout(TIMEOUT); // timeout is set to 100 seconds to avoid cancellation during calculation
mIsoDep.connect();
// 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(opening).equals(accepted)) { // activate connection
toast("Opening Error!");
setResult(RESULT_CANCELED);
finish();
return;
}
byte[] pin = new String(mPin.getCharArray()).getBytes();
// 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);
if ( ! card(login).equals(accepted)) { // login
toast("Wrong PIN!");
setResult(RESULT_CANCELED);
finish();
return;
}
@Override
protected void onNfcPerform() throws IOException {
CryptoInputParcel resultData = new CryptoInputParcel(mRequiredInput.mSignatureTime);
@ -233,292 +84,9 @@ public class NfcOperationActivity extends BaseActivity {
// give data through for new service call
Intent result = new Intent();
result.putExtra(RESULT_DATA, resultData);
result.putExtra(NfcOperationActivity.RESULT_DATA, resultData);
setResult(RESULT_OK, result);
finish();
}
/**
* Gets the user ID
*
* @return the user id as "name <email>"
* @throws java.io.IOException
*/
public String getUserId() throws IOException {
String info = "00CA006500";
String data = "00CA005E00";
return getName(card(info)) + " <" + (new String(Hex.decode(getDataField(card(data))))) + ">";
}
/** Return the key id from application specific data stored on tag, or null
* if it doesn't exist.
*
* @param idx Index of the key to return the fingerprint from.
* @return The long key id of the requested key, or null if not found.
*/
public static Long nfcGetKeyId(IsoDep isoDep, int idx) throws IOException {
byte[] fp = nfcGetFingerprint(isoDep, idx);
if (fp == null) {
return null;
}
ByteBuffer buf = ByteBuffer.wrap(fp);
// skip first 12 bytes of the fingerprint
buf.position(12);
// the last eight bytes are the key id (big endian, which is default order in ByteBuffer)
return buf.getLong();
}
/** Return fingerprints of all keys from application specific data stored
* on tag, or null if data not available.
*
* @return The fingerprints of all subkeys in a contiguous byte array.
*/
public static byte[] nfcGetFingerprints(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) {
return null;
}
return fptlv.mV;
}
/** Return the fingerprint from application specific data stored on tag, or
* null if it doesn't exist.
*
* @param idx Index of the key to return the fingerprint from.
* @return The fingerprint of the requested key, or null if not found.
*/
public static byte[] nfcGetFingerprint(IsoDep isoDep, int idx) throws IOException {
byte[] data = nfcGetFingerprints(isoDep);
// return the master key fingerprint
ByteBuffer fpbuf = ByteBuffer.wrap(data);
byte[] fp = new byte[20];
fpbuf.position(idx*20);
fpbuf.get(fp, 0, 20);
return fp;
}
/**
* Calls to calculate the signature and returns the MPI value
*
* @param hash the hash for signing
* @return a big integer representing the MPI for the given hash
* @throws java.io.IOException
*/
public byte[] nfcCalculateSignature(byte[] hash, int hashAlgo) throws IOException {
// dsi, including Lc
String dsi;
Log.i(Constants.TAG, "Hash: " + hashAlgo);
switch (hashAlgo) {
case HashAlgorithmTags.SHA1:
if (hash.length != 20) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 10!");
}
dsi = "23" // Lc
+ "3021" // Tag/Length of Sequence, the 0x21 includes all following 33 bytes
+ "3009" // Tag/Length of Sequence, the 0x09 are the following header bytes
+ "0605" + "2B0E03021A" // OID of SHA1
+ "0500" // TLV coding of ZERO
+ "0414" + getHex(hash); // 0x14 are 20 hash bytes
break;
case HashAlgorithmTags.RIPEMD160:
if (hash.length != 20) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 20!");
}
dsi = "233021300906052B2403020105000414" + getHex(hash);
break;
case HashAlgorithmTags.SHA224:
if (hash.length != 28) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 28!");
}
dsi = "2F302D300D06096086480165030402040500041C" + getHex(hash);
break;
case HashAlgorithmTags.SHA256:
if (hash.length != 32) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 32!");
}
dsi = "333031300D060960864801650304020105000420" + getHex(hash);
break;
case HashAlgorithmTags.SHA384:
if (hash.length != 48) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 48!");
}
dsi = "433041300D060960864801650304020205000430" + getHex(hash);
break;
case HashAlgorithmTags.SHA512:
if (hash.length != 64) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 64!");
}
dsi = "533051300D060960864801650304020305000440" + getHex(hash);
break;
default:
throw new RuntimeException("Not supported hash algo!");
}
// Command APDU for PERFORM SECURITY OPERATION: COMPUTE DIGITAL SIGNATURE (page 37)
String apdu =
"002A9E9A" // CLA, INS, P1, P2
+ dsi // digital signature input
+ "00"; // Le
String response = card(apdu);
// split up response into signature and status
String status = response.substring(response.length()-4);
String signature = response.substring(0, response.length() - 4);
// while we are getting 0x61 status codes, retrieve more data
while (status.substring(0, 2).equals("61")) {
Log.d(Constants.TAG, "requesting more data, status " + status);
// Send GET RESPONSE command
response = card("00C00000" + status.substring(2));
status = response.substring(response.length()-4);
signature += response.substring(0, response.length()-4);
}
Log.d(Constants.TAG, "final response:" + status);
if ( ! status.equals("9000")) {
toast("Bad NFC response code: " + status);
return null;
}
// Make sure the signature we received is actually the expected number of bytes long!
if (signature.length() != 256 && signature.length() != 512) {
toast("Bad signature length! Expected 128 or 256 bytes, got " + signature.length() / 2);
return null;
}
return Hex.decode(signature);
}
/**
* Calls to calculate the signature and returns the MPI value
*
* @param encryptedSessionKey the encoded session key
* @return the decoded session key
* @throws java.io.IOException
*/
public byte[] nfcDecryptSessionKey(byte[] encryptedSessionKey) throws IOException {
String firstApdu = "102a8086fe";
String secondApdu = "002a808603";
String le = "00";
byte[] one = new byte[254];
// leave out first byte:
System.arraycopy(encryptedSessionKey, 1, one, 0, one.length);
byte[] two = new byte[encryptedSessionKey.length - 1 - one.length];
for (int i = 0; i < two.length; i++) {
two[i] = encryptedSessionKey[i + one.length + 1];
}
String first = card(firstApdu + getHex(one));
String second = card(secondApdu + getHex(two) + le);
String decryptedSessionKey = getDataField(second);
Log.d(Constants.TAG, "decryptedSessionKey: " + decryptedSessionKey);
return Hex.decode(decryptedSessionKey);
}
/**
* 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, NfcOperationActivity.class)
.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent nfcPendingIntent = PendingIntent.getActivity(this, 0, nfcI, PendingIntent.FLAG_CANCEL_CURRENT);
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 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 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 String card(String hex) throws IOException {
return getHex(mIsoDep.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));
}
}

View File

@ -30,6 +30,7 @@ import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.ui.util.Notify.Style;

View File

@ -40,6 +40,7 @@ import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.ParcelableFileCache;

View File

@ -27,6 +27,7 @@ import android.view.ViewGroup;
import android.widget.TextView;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.widget.Editor;
import org.sufficientlysecure.keychain.ui.widget.Editor.EditorListener;
import org.sufficientlysecure.keychain.ui.widget.KeyServerEditor;

View File

@ -37,6 +37,7 @@ import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Preferences;

View File

@ -40,6 +40,7 @@ import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException;
import org.sufficientlysecure.keychain.provider.KeychainContract.Certs;
import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.util.Log;

View File

@ -66,6 +66,7 @@ import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler.MessageStatus;
import org.sufficientlysecure.keychain.service.PassphraseCacheService;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.dialog.DeleteKeyDialogFragment;
import org.sufficientlysecure.keychain.ui.util.FormattingUtils;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;

View File

@ -38,6 +38,7 @@ import org.sufficientlysecure.keychain.pgp.KeyRing;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.ui.adapter.PagerTabStripAdapter;
import org.sufficientlysecure.keychain.ui.base.BaseActivity;
import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
import org.sufficientlysecure.keychain.util.ContactHelper;
import org.sufficientlysecure.keychain.util.ExportHelper;

View File

@ -15,7 +15,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui;
package org.sufficientlysecure.keychain.ui.base;
import android.app.Activity;
import android.os.Bundle;
@ -63,8 +63,8 @@ public abstract class BaseActivity extends ActionBarActivity {
* Inflate custom design to look like a full screen dialog, as specified in Material Design Guidelines
* see http://www.google.com/design/spec/components/dialogs.html#dialogs-full-screen-dialogs
*/
protected void setFullScreenDialogDoneClose(int doneText, View.OnClickListener doneOnClickListener,
View.OnClickListener cancelOnClickListener) {
public void setFullScreenDialogDoneClose(int doneText, View.OnClickListener doneOnClickListener,
View.OnClickListener cancelOnClickListener) {
setActionBarIcon(R.drawable.ic_close_white_24dp);
// Inflate the custom action bar view

View File

@ -0,0 +1,448 @@
package org.sufficientlysecure.keychain.ui.base;
import java.io.IOException;
import java.nio.ByteBuffer;
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.Bundle;
import android.widget.Toast;
import org.spongycastle.bcpg.HashAlgorithmTags;
import org.spongycastle.util.encoders.Hex;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
import org.sufficientlysecure.keychain.service.input.RequiredInputParcel;
import org.sufficientlysecure.keychain.ui.NfcOperationActivity;
import org.sufficientlysecure.keychain.ui.PassphraseDialogActivity;
import org.sufficientlysecure.keychain.util.Iso7816TLV;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Passphrase;
import org.sufficientlysecure.keychain.util.Preferences;
public abstract class BaseNfcActivity extends BaseActivity {
public static final int REQUEST_CODE_PASSPHRASE = 1;
protected Passphrase mPin;
private NfcAdapter mNfcAdapter;
private IsoDep mIsoDep;
private static final int TIMEOUT = 100000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
String action = intent.getAction();
if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)) {
throw new AssertionError("should not happen: NfcOperationActivity.onCreate is called instead of onNewIntent!");
}
}
/**
* This activity is started as a singleTop activity.
* All new NFC Intents which are delivered to this activity are handled here
*/
@Override
public void onNewIntent(Intent intent) {
if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {
try {
handleNdefDiscoveredIntent(intent);
} catch (IOException e) {
Log.e(Constants.TAG, "Connection error!", e);
toast("Connection Error: " + e.getMessage());
setResult(RESULT_CANCELED);
finish();
}
}
}
/**
* 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, "NfcOperationActivity.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, "NfcOperationActivity.onResume");
enableNfcForegroundDispatch();
}
protected void obtainYubikeyPin(RequiredInputParcel requiredInput) {
Preferences prefs = Preferences.getPreferences(this);
if (prefs.useDefaultYubikeyPin()) {
mPin = new Passphrase("123456");
return;
}
Intent intent = new Intent(this, PassphraseDialogActivity.class);
intent.putExtra(PassphraseDialogActivity.EXTRA_REQUIRED_INPUT,
RequiredInputParcel.createRequiredPassphrase(requiredInput));
startActivityForResult(intent, REQUEST_CODE_PASSPHRASE);
}
protected void setYubikeyPin(Passphrase pin) {
mPin = pin;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CODE_PASSPHRASE:
CryptoInputParcel input = data.getParcelableExtra(PassphraseDialogActivity.RESULT_DATA);
mPin = input.getPassphrase();
break;
default:
super.onActivityResult(requestCode, resultCode, data);
}
}
/** 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.
*
*/
protected void handleNdefDiscoveredIntent(Intent intent) throws IOException {
Tag detectedTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
// Connect to the detected tag, setting a couple of settings
mIsoDep = IsoDep.get(detectedTag);
mIsoDep.setTimeout(TIMEOUT); // timeout is set to 100 seconds to avoid cancellation during calculation
mIsoDep.connect();
// 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 ( ! nfcCommunicate(opening).equals(accepted)) { // activate connection
toast("Opening Error!");
setResult(RESULT_CANCELED);
finish();
return;
}
if (mPin != null) {
byte[] pin = new String(mPin.getCharArray()).getBytes();
// 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);
if (!nfcCommunicate(login).equals(accepted)) { // login
toast("Wrong PIN!");
setResult(RESULT_CANCELED);
finish();
return;
}
}
onNfcPerform();
mIsoDep.close();
mIsoDep = null;
}
protected abstract void onNfcPerform() throws IOException;
/** Return the key id from application specific data stored on tag, or null
* if it doesn't exist.
*
* @param idx Index of the key to return the fingerprint from.
* @return The long key id of the requested key, or null if not found.
*/
public Long nfcGetKeyId(int idx) throws IOException {
byte[] fp = nfcGetFingerprint(idx);
if (fp == null) {
return null;
}
ByteBuffer buf = ByteBuffer.wrap(fp);
// skip first 12 bytes of the fingerprint
buf.position(12);
// the last eight bytes are the key id (big endian, which is default order in ByteBuffer)
return buf.getLong();
}
/** Return fingerprints of all keys from application specific data stored
* on tag, or null if data not available.
*
* @return The fingerprints of all subkeys in a contiguous byte array.
*/
public byte[] nfcGetFingerprints() throws IOException {
String data = "00CA006E00";
byte[] buf = mIsoDep.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) {
return null;
}
return fptlv.mV;
}
/** Return the fingerprint from application specific data stored on tag, or
* null if it doesn't exist.
*
* @param idx Index of the key to return the fingerprint from.
* @return The fingerprint of the requested key, or null if not found.
*/
public byte[] nfcGetFingerprint(int idx) throws IOException {
byte[] data = nfcGetFingerprints();
// return the master key fingerprint
ByteBuffer fpbuf = ByteBuffer.wrap(data);
byte[] fp = new byte[20];
fpbuf.position(idx*20);
fpbuf.get(fp, 0, 20);
return fp;
}
public String nfcGetUserId() throws IOException {
String info = "00CA006500";
String data = "00CA005E00";
return nfcGetHolderName(nfcCommunicate(info)) + " <" + (new String(Hex.decode(nfcGetDataField(
nfcCommunicate(data))))) + ">";
}
/**
* Calls to calculate the signature and returns the MPI value
*
* @param hash the hash for signing
* @return a big integer representing the MPI for the given hash
*/
public byte[] nfcCalculateSignature(byte[] hash, int hashAlgo) throws IOException {
// dsi, including Lc
String dsi;
Log.i(Constants.TAG, "Hash: " + hashAlgo);
switch (hashAlgo) {
case HashAlgorithmTags.SHA1:
if (hash.length != 20) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 10!");
}
dsi = "23" // Lc
+ "3021" // Tag/Length of Sequence, the 0x21 includes all following 33 bytes
+ "3009" // Tag/Length of Sequence, the 0x09 are the following header bytes
+ "0605" + "2B0E03021A" // OID of SHA1
+ "0500" // TLV coding of ZERO
+ "0414" + getHex(hash); // 0x14 are 20 hash bytes
break;
case HashAlgorithmTags.RIPEMD160:
if (hash.length != 20) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 20!");
}
dsi = "233021300906052B2403020105000414" + getHex(hash);
break;
case HashAlgorithmTags.SHA224:
if (hash.length != 28) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 28!");
}
dsi = "2F302D300D06096086480165030402040500041C" + getHex(hash);
break;
case HashAlgorithmTags.SHA256:
if (hash.length != 32) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 32!");
}
dsi = "333031300D060960864801650304020105000420" + getHex(hash);
break;
case HashAlgorithmTags.SHA384:
if (hash.length != 48) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 48!");
}
dsi = "433041300D060960864801650304020205000430" + getHex(hash);
break;
case HashAlgorithmTags.SHA512:
if (hash.length != 64) {
throw new RuntimeException("Bad hash length (" + hash.length + ", expected 64!");
}
dsi = "533051300D060960864801650304020305000440" + getHex(hash);
break;
default:
throw new RuntimeException("Not supported hash algo!");
}
// Command APDU for PERFORM SECURITY OPERATION: COMPUTE DIGITAL SIGNATURE (page 37)
String apdu =
"002A9E9A" // CLA, INS, P1, P2
+ dsi // digital signature input
+ "00"; // Le
String response = nfcCommunicate(apdu);
// split up response into signature and status
String status = response.substring(response.length()-4);
String signature = response.substring(0, response.length() - 4);
// while we are getting 0x61 status codes, retrieve more data
while (status.substring(0, 2).equals("61")) {
Log.d(Constants.TAG, "requesting more data, status " + status);
// Send GET RESPONSE command
response = nfcCommunicate("00C00000" + status.substring(2));
status = response.substring(response.length()-4);
signature += response.substring(0, response.length()-4);
}
Log.d(Constants.TAG, "final response:" + status);
if ( ! "9000".equals(status)) {
toast("Bad NFC response code: " + status);
return null;
}
// Make sure the signature we received is actually the expected number of bytes long!
if (signature.length() != 256 && signature.length() != 512) {
toast("Bad signature length! Expected 128 or 256 bytes, got " + signature.length() / 2);
return null;
}
return Hex.decode(signature);
}
/**
* Calls to calculate the signature and returns the MPI value
*
* @param encryptedSessionKey the encoded session key
* @return the decoded session key
*/
public byte[] nfcDecryptSessionKey(byte[] encryptedSessionKey) throws IOException {
String firstApdu = "102a8086fe";
String secondApdu = "002a808603";
String le = "00";
byte[] one = new byte[254];
// leave out first byte:
System.arraycopy(encryptedSessionKey, 1, one, 0, one.length);
byte[] two = new byte[encryptedSessionKey.length - 1 - one.length];
for (int i = 0; i < two.length; i++) {
two[i] = encryptedSessionKey[i + one.length + 1];
}
String first = nfcCommunicate(firstApdu + getHex(one));
String second = nfcCommunicate(secondApdu + getHex(two) + le);
String decryptedSessionKey = nfcGetDataField(second);
Log.d(Constants.TAG, "decryptedSessionKey: " + decryptedSessionKey);
return Hex.decode(decryptedSessionKey);
}
/**
* Prints a message to the screen
*
* @param text the text which should be contained within the toast
*/
protected 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, NfcOperationActivity.class)
.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent nfcPendingIntent = PendingIntent.getActivity(this, 0, nfcI, PendingIntent.FLAG_CANCEL_CURRENT);
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!");
}
public String nfcGetHolderName(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);
}
private String nfcGetDataField(String output) {
return output.substring(0, output.length() - 4);
}
public String nfcCommunicate(String apdu) throws IOException {
return getHex(mIsoDep.transceive(Hex.decode(apdu)));
}
public static String getHex(byte[] raw) {
return new String(Hex.encode(raw));
}
}

View File

@ -50,22 +50,22 @@
android:clickable="true"
style="?android:attr/borderlessButtonStyle" />
<!--<TextView-->
<!--android:id="@+id/create_key_yubikey_button"-->
<!--android:paddingLeft="16dp"-->
<!--android:paddingRight="16dp"-->
<!--android:textAppearance="?android:attr/textAppearanceMedium"-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="wrap_content"-->
<!--android:layout_weight="1"-->
<!--android:text="@string/first_time_yubikey"-->
<!--android:textAllCaps="true"-->
<!--android:minHeight="?android:attr/listPreferredItemHeight"-->
<!--android:drawableRight="@drawable/ic_chevron_right_grey_24dp"-->
<!--android:drawablePadding="8dp"-->
<!--android:gravity="right|center_vertical"-->
<!--android:clickable="true"-->
<!--style="?android:attr/borderlessButtonStyle" />-->
<TextView
android:id="@+id/create_key_yubikey_button"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/first_time_yubikey"
android:textAllCaps="true"
android:minHeight="?android:attr/listPreferredItemHeight"
android:drawableRight="@drawable/ic_chevron_right_grey_24dp"
android:drawablePadding="8dp"
android:gravity="right|center_vertical"
android:clickable="true"
style="?android:attr/borderlessButtonStyle" />
<TextView
android:id="@+id/create_key_import_button"

View File

@ -0,0 +1,83 @@
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:layout_above="@+id/create_key_buttons">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginLeft="8dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Hold Yubikey against device dawg" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginLeft="8dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="(yubikey fingerprint)" />
</LinearLayout>
</ScrollView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="@color/holo_gray_bright"
android:id="@+id/create_key_buttons">
<TextView
android:id="@+id/create_key_back_button"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/btn_back"
android:textAllCaps="true"
android:minHeight="?android:attr/listPreferredItemHeight"
android:drawableLeft="@drawable/ic_chevron_left_grey_24dp"
android:drawablePadding="8dp"
android:gravity="left|center_vertical"
android:clickable="true"
style="?android:attr/borderlessButtonStyle" />
<TextView
android:id="@+id/create_key_next_button"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/btn_next"
android:textAllCaps="true"
android:minHeight="?android:attr/listPreferredItemHeight"
android:drawableRight="@drawable/ic_chevron_right_grey_24dp"
android:drawablePadding="8dp"
android:gravity="right|center_vertical"
android:clickable="true"
style="?android:attr/borderlessButtonStyle" />
</LinearLayout>
</RelativeLayout>