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tls exceptions for untrusted certs

This commit is contained in:
Daniel Gultsch 2014-03-07 14:24:33 +01:00
parent 1cf05fccdb
commit 3bb5fcb3ca
8 changed files with 223 additions and 39 deletions
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32
res/layout/cert_warning.xml Normal file
View File

@ -0,0 +1,32 @@
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="8dp">
<TextView
android:id="@+id/hint"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"/>
<TextView
android:paddingTop="8dp"
android:paddingBottom="8dp"
android:id="@+id/sha"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:typeface="monospace"
android:textSize="18sp"/>
<TextView
android:id="@+id/dont"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFe92727"
android:textStyle="bold"
android:textSize="18sp"
android:text="Do not connect unless you know exactly what you are doing" />
</LinearLayout>

17
res/menu/manageaccounts_context.xml
View File

@ -1,23 +1,28 @@
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/account_delete"
android:id="@+id/mgmt_account_edit"
android:icon="@drawable/ic_action_edit"
android:title="Edit Account"
android:showAsAction="always" />
<item
android:id="@+id/mgmt_account_delete"
android:icon="@drawable/ic_action_delete"
android:title="Delete"
android:showAsAction="always"
/>
<item
android:id="@+id/account_disable"
android:id="@+id/mgmt_account_disable"
android:title="Temporarily disable"
android:showAsAction="always"/>
android:showAsAction="never"/>
<item
android:id="@+id/account_enable"
android:id="@+id/mgmt_account_enable"
android:title="Enable"
android:showAsAction="always"
android:showAsAction="never"
android:visible="false"/>
<item
android:id="@+id/announce_pgp"
android:id="@+id/mgmt_account_announce_pgp"
android:orderInCategory="75"
android:showAsAction="never"
android:title="@string/announce_pgp" />

16
src/eu/siacs/conversations/entities/Account.java
View File

@ -138,6 +138,22 @@ public class Account extends AbstractEntity{
return keys;
}
public String getSSLFingerprint() {
if (keys.has("ssl_cert")) {
try {
return keys.getString("ssl_cert");
} catch (JSONException e) {
return null;
}
} else {
return null;
}
}
public void setSSLCertFingerprint(String fingerprint) {
this.setKey("ssl_cert", fingerprint);
}
public boolean setKey(String keyName, String keyValue) {
try {
this.keys.put(keyName, keyValue);

46
src/eu/siacs/conversations/services/XmppConnectionService.java
View File

@ -41,6 +41,7 @@ import eu.siacs.conversations.xmpp.OnIqPacketReceived;
import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
import eu.siacs.conversations.xmpp.OnPresencePacketReceived;
import eu.siacs.conversations.xmpp.OnStatusChanged;
import eu.siacs.conversations.xmpp.OnTLSExceptionReceived;
import eu.siacs.conversations.xmpp.PresencePacket;
import eu.siacs.conversations.xmpp.XmppConnection;
import android.app.AlarmManager;
@ -76,6 +77,11 @@ public class XmppConnectionService extends Service {
public OnConversationListChangedListener convChangedListener = null;
private OnAccountListChangedListener accountChangedListener = null;
private OnTLSExceptionReceived tlsException = null;
public void setOnTLSExceptionReceivedListener(OnTLSExceptionReceived listener) {
tlsException = listener;
}
private Random mRandom = new Random(System.currentTimeMillis());
@ -169,7 +175,9 @@ public class XmppConnectionService extends Service {
@Override
public void onStatusChanged(Account account) {
Log.d(LOGTAG,account.getJid()+" status switched to " + account.getStatus());
if (accountChangedListener != null) {
Log.d(LOGTAG,"notifiy ui");
accountChangedListener.onAccountListChangedListener();
}
if (account.getStatus() == Account.STATUS_ONLINE) {
@ -452,6 +460,16 @@ public class XmppConnectionService extends Service {
connection.setOnPresencePacketReceivedListener(this.presenceListener);
connection
.setOnUnregisteredIqPacketReceivedListener(this.unknownIqListener);
connection.setOnTLSExceptionReceivedListener(new OnTLSExceptionReceived() {
@Override
public void onTLSExceptionReceived(String fingerprint, Account account) {
Log.d(LOGTAG,"tls exception arrived in service");
if (tlsException!=null) {
tlsException.onTLSExceptionReceived(fingerprint,account);
}
}
});
return connection;
}
@ -816,16 +834,7 @@ public class XmppConnectionService extends Service {
public void updateAccount(Account account) {
databaseBackend.updateAccount(account);
if (account.getXmppConnection() != null) {
disconnect(account);
}
if (!account.isOptionSet(Account.OPTION_DISABLED)) {
if (account.getXmppConnection()==null) {
account.setXmppConnection(this.createConnection(account));
}
Thread thread = new Thread(account.getXmppConnection());
thread.start();
}
reconnectAccount(account);
if (accountChangedListener != null)
accountChangedListener.onAccountListChangedListener();
}
@ -1097,4 +1106,21 @@ public class XmppConnectionService extends Service {
}
return contact;
}
public void removeOnTLSExceptionReceivedListener() {
this.tlsException = null;
}
public void reconnectAccount(Account account) {
if (account.getXmppConnection() != null) {
disconnect(account);
}
if (!account.isOptionSet(Account.OPTION_DISABLED)) {
if (account.getXmppConnection()==null) {
account.setXmppConnection(this.createConnection(account));
}
Thread thread = new Thread(account.getXmppConnection());
thread.start();
}
}
}

92
src/eu/siacs/conversations/ui/ManageAccountActivity.java
View File

@ -8,6 +8,7 @@ import eu.siacs.conversations.crypto.PgpEngine;
import eu.siacs.conversations.crypto.PgpEngine.UserInputRequiredException;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.ui.EditAccount.EditAccountListener;
import eu.siacs.conversations.xmpp.OnTLSExceptionReceived;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
@ -18,7 +19,6 @@ import android.content.IntentSender.SendIntentException;
import android.os.Bundle;
import android.util.Log;
import android.view.ActionMode;
import android.view.ActionMode.Callback;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
@ -39,6 +39,7 @@ public class ManageAccountActivity extends XmppActivity {
protected boolean isActionMode = false;
protected ActionMode actionMode;
protected Account selectedAccountForActionMode = null;
protected ManageAccountActivity activity = this;
protected List<Account> accountList = new ArrayList<Account>();
protected ListView accountListView;
@ -60,6 +61,45 @@ public class ManageAccountActivity extends XmppActivity {
}
};
protected OnTLSExceptionReceived tlsExceptionReceived = new OnTLSExceptionReceived() {
@Override
public void onTLSExceptionReceived(final String fingerprint, final Account account) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setTitle("Untrusted Certificate");
builder.setIconAttribute(android.R.attr.alertDialogIcon);
View view = (View) getLayoutInflater().inflate(R.layout.cert_warning, null);
TextView sha = (TextView) view.findViewById(R.id.sha);
TextView hint = (TextView) view.findViewById(R.id.hint);
StringBuilder humanReadableSha = new StringBuilder();
humanReadableSha.append(fingerprint);
for(int i = 2; i < 58; i += 3) {
humanReadableSha.insert(i, ":");
}
hint.setText(account.getServer()+" presented you with an unstrusted, possible self signed, certificate.\nThe SHA1 fingerprint is");
sha.setText(humanReadableSha.toString());
builder.setView(view);
//builder.setMessage(server+" presented you with an unstrusted, possible self signed, certificate. The SHA1 fingerprint is "+fingerprint+" Do not connect unless you know exactly what you are doing");
builder.setNegativeButton("Don't connect", null);
builder.setPositiveButton("Trust certificate", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
account.setSSLCertFingerprint(fingerprint);
activity.xmppConnectionService.updateAccount(account);
}
});
builder.create().show();
}
});
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
@ -114,6 +154,10 @@ public class ManageAccountActivity extends XmppActivity {
statusView.setText("server requires TLS");
statusView.setTextColor(0xFFe92727);
break;
case Account.STATUS_TLS_ERROR:
statusView.setText("untrusted cerficate");
statusView.setTextColor(0xFFe92727);
break;
default:
break;
}
@ -129,16 +173,14 @@ public class ManageAccountActivity extends XmppActivity {
public void onItemClick(AdapterView<?> arg0, View view,
int position, long arg3) {
if (!isActionMode) {
EditAccount dialog = new EditAccount();
dialog.setAccount(accountList.get(position));
dialog.setEditAccountListener(new EditAccountListener() {
Account account = accountList.get(position);
if ((account.getStatus() != Account.STATUS_ONLINE)&&(account.getStatus() != Account.STATUS_CONNECTING)&&(!account.isOptionSet(Account.OPTION_DISABLED))) {
activity.xmppConnectionService.reconnectAccount(accountList.get(position));
} else if (account.getStatus() == Account.STATUS_ONLINE) {
activity.startActivity(new Intent(activity.getApplicationContext(),NewConversationActivity.class));
}
@Override
public void onAccountEdited(Account account) {
xmppConnectionService.updateAccount(account);
}
});
dialog.show(getFragmentManager(), "edit_account");
Log.d("gultsch","clicked on account "+accountList.get(position).getJid());
} else {
selectedAccountForActionMode = accountList.get(position);
actionMode.invalidate();
@ -159,11 +201,11 @@ public class ManageAccountActivity extends XmppActivity {
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
if (selectedAccountForActionMode.isOptionSet(Account.OPTION_DISABLED)) {
menu.findItem(R.id.account_enable).setVisible(true);
menu.findItem(R.id.account_disable).setVisible(false);
menu.findItem(R.id.mgmt_account_enable).setVisible(true);
menu.findItem(R.id.mgmt_account_disable).setVisible(false);
} else {
menu.findItem(R.id.account_disable).setVisible(true);
menu.findItem(R.id.account_enable).setVisible(false);
menu.findItem(R.id.mgmt_account_disable).setVisible(true);
menu.findItem(R.id.mgmt_account_enable).setVisible(false);
}
return true;
}
@ -183,15 +225,27 @@ public class ManageAccountActivity extends XmppActivity {
@Override
public boolean onActionItemClicked(final ActionMode mode, MenuItem item) {
if (item.getItemId()==R.id.account_disable) {
if (item.getItemId()==R.id.mgmt_account_edit) {
EditAccount dialog = new EditAccount();
dialog.setAccount(selectedAccountForActionMode);
dialog.setEditAccountListener(new EditAccountListener() {
@Override
public void onAccountEdited(Account account) {
xmppConnectionService.updateAccount(account);
actionMode.finish();
}
});
dialog.show(getFragmentManager(), "edit_account");
} else if (item.getItemId()==R.id.mgmt_account_disable) {
selectedAccountForActionMode.setOption(Account.OPTION_DISABLED, true);
xmppConnectionService.updateAccount(selectedAccountForActionMode);
mode.finish();
} else if (item.getItemId()==R.id.account_enable) {
} else if (item.getItemId()==R.id.mgmt_account_enable) {
selectedAccountForActionMode.setOption(Account.OPTION_DISABLED, false);
xmppConnectionService.updateAccount(selectedAccountForActionMode);
mode.finish();
} else if (item.getItemId()==R.id.account_delete) {
} else if (item.getItemId()==R.id.mgmt_account_delete) {
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setTitle("Are you sure?");
builder.setIconAttribute(android.R.attr.alertDialogIcon);
@ -207,7 +261,7 @@ public class ManageAccountActivity extends XmppActivity {
});
builder.setNegativeButton("Cancel",null);
builder.create().show();
} else if (item.getItemId()==R.id.announce_pgp) {
} else if (item.getItemId()==R.id.mgmt_account_announce_pgp) {
if (activity.hasPgp()) {
mode.finish();
try {
@ -236,6 +290,7 @@ public class ManageAccountActivity extends XmppActivity {
protected void onStop() {
if (xmppConnectionServiceBound) {
xmppConnectionService.removeOnAccountListChangedListener();
xmppConnectionService.removeOnTLSExceptionReceivedListener();
}
super.onStop();
}
@ -243,6 +298,7 @@ public class ManageAccountActivity extends XmppActivity {
@Override
void onBackendConnected() {
xmppConnectionService.setOnAccountListChangedListener(accountChanged);
xmppConnectionService.setOnTLSExceptionReceivedListener(tlsExceptionReceived);
this.accountList.clear();
this.accountList.addAll(xmppConnectionService.getAccounts());
accountListViewAdapter.notifyDataSetChanged();

14
src/eu/siacs/conversations/utils/CryptoHelper.java Normal file
View File

@ -0,0 +1,14 @@
package eu.siacs.conversations.utils;
public class CryptoHelper {
final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for ( int j = 0; j < bytes.length; j++ ) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
}

7
src/eu/siacs/conversations/xmpp/OnTLSExceptionReceived.java Normal file
View File

@ -0,0 +1,7 @@
package eu.siacs.conversations.xmpp;
import eu.siacs.conversations.entities.Account;
public interface OnTLSExceptionReceived {
public void onTLSExceptionReceived(String fingerprint, Account account);
}

36
src/eu/siacs/conversations/xmpp/XmppConnection.java
View File

@ -9,6 +9,7 @@ import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.CertPathValidatorException;
@ -33,6 +34,7 @@ import android.os.Bundle;
import android.os.PowerManager;
import android.util.Log;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.utils.DNSHelper;
import eu.siacs.conversations.utils.SASL;
import eu.siacs.conversations.xml.Element;
@ -71,6 +73,7 @@ public class XmppConnection implements Runnable {
private OnIqPacketReceived unregisteredIqListener = null;
private OnMessagePacketReceived messageListener = null;
private OnStatusChanged statusListener = null;
private OnTLSExceptionReceived tlsListener;
public XmppConnection(Account account, PowerManager pm) {
this.account = account;
@ -127,7 +130,9 @@ public class XmppConnection implements Runnable {
}
return;
} catch (IOException e) {
this.changeStatus(Account.STATUS_OFFLINE);
if (account.getStatus() != Account.STATUS_TLS_ERROR) {
this.changeStatus(Account.STATUS_OFFLINE);
}
if (wakeLock.isHeld()) {
wakeLock.release();
}
@ -312,7 +317,26 @@ public class XmppConnection implements Runnable {
try {
origTrustmanager.checkServerTrusted(chain, authType);
} catch (CertificateException e) {
Log.d(LOGTAG,"cert exeption");
if (e.getCause() instanceof CertPathValidatorException) {
String sha;
try {
MessageDigest sha1 = MessageDigest.getInstance("SHA1");
sha1.update(chain[0].getEncoded());
sha = CryptoHelper.bytesToHex(sha1.digest());
if (!sha.equals(account.getSSLFingerprint())) {
changeStatus(Account.STATUS_TLS_ERROR);
if (tlsListener!=null) {
tlsListener.onTLSExceptionReceived(sha,account);
}
throw new CertificateException();
}
} catch (NoSuchAlgorithmException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
} else {
throw new CertificateException();
}
}
}
@ -325,8 +349,8 @@ public class XmppConnection implements Runnable {
sc.init(null, wrappedTrustManagers, null);
SSLSocketFactory factory = sc.getSocketFactory();
SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,
socket.getInetAddress().getHostAddress(), socket.getPort(),
true);
socket.getInetAddress().getHostAddress(), socket.getPort(),
true);
tagReader.setInputStream(sslSocket.getInputStream());
Log.d(LOGTAG, "reset inputstream");
tagWriter.setOutputStream(sslSocket.getOutputStream());
@ -529,6 +553,10 @@ public class XmppConnection implements Runnable {
this.statusListener = listener;
}
public void setOnTLSExceptionReceivedListener(OnTLSExceptionReceived listener) {
this.tlsListener = listener;
}
public void disconnect() {
shouldConnect = false;
tagWriter.writeTag(Tag.end("stream:stream"));