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Code Issues Releases Wiki Activity

Merge pull request #554 from SamWhited/tls

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Enable TLSv1.1 and 1.2 and add option to enable/disable SSLv3
This commit is contained in:
Daniel Gultsch 2014-10-20 00:03:32 +02:00
commit 0b61fb0129
3 changed files with 48 additions and 10 deletions
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2
res/values/strings.xml
View File

@ -250,6 +250,8 @@
<string name="pref_force_encryption_summary">Always send messages encrypted (except for conferences)</string>
<string name="pref_dont_save_encrypted">Don’t save encrypted messages</string>
<string name="pref_dont_save_encrypted_summary">Warning: This could lead to message loss</string>
<string name="pref_enable_legacy_ssl">Enable legacy SSL</string>
<string name="pref_enable_legacy_ssl_summary">Enables SSLv3 support for legacy servers. Warning: SSLv3 is considered insecure.</string>
<string name="pref_expert_options">Expert options</string>
<string name="pref_expert_options_summary">Please be very careful with those</string>
<string name="pref_use_larger_font">Increase font size</string>

5
res/xml/preferences.xml
View File

@ -88,6 +88,11 @@
android:key="dont_save_encrypted"
android:summary="@string/pref_dont_save_encrypted_summary"
android:title="@string/pref_dont_save_encrypted" />
<CheckBoxPreference
android:defaultValue="false"
android:key="enable_legacy_ssl"
android:summary="@string/pref_enable_legacy_ssl_summary"
android:title="@string/pref_enable_legacy_ssl" />
</PreferenceCategory>
<PreferenceCategory android:title="@string/pref_expert_options_other" >
<CheckBoxPreference

31
src/eu/siacs/conversations/xmpp/XmppConnection.java
View File

@ -10,8 +10,10 @@ import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.LinkedList;
import java.util.List;
import java.util.Map.Entry;
@ -26,15 +28,19 @@ import org.xmlpull.v1.XmlPullParserException;
import de.duenndns.ssl.MemorizingTrustManager;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.util.Log;
import android.util.SparseArray;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.ui.StartConversationActivity;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.utils.DNSHelper;
import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
@ -105,6 +111,7 @@ public class XmppConnection implements Runnable {
private OnBindListener bindListener = null;
private OnMessageAcknowledged acknowledgedListener = null;
private MemorizingTrustManager mMemorizingTrustManager;
private final Context applicationContext;
public XmppConnection(Account account, XmppConnectionService service) {
this.mRandom = service.getRNG();
@ -113,6 +120,7 @@ public class XmppConnection implements Runnable {
this.wakeLock = service.getPowerManager().newWakeLock(
PowerManager.PARTIAL_WAKE_LOCK, account.getJid());
tagWriter = new TagWriter();
applicationContext = service.getApplicationContext();
}
protected void changeStatus(int nextStatus) {
@ -519,6 +527,14 @@ public class XmppConnection implements Runnable {
tagWriter.writeTag(startTLS);
}
private SharedPreferences getPreferences() {
return PreferenceManager.getDefaultSharedPreferences(applicationContext);
}
private boolean enableLegacySSL() {
return getPreferences().getBoolean("enable_legacy_ssl", false);
}
private void switchOverToTls(Tag currentTag) throws XmlPullParserException,
IOException {
tagReader.readTag();
@ -535,6 +551,21 @@ public class XmppConnection implements Runnable {
socket.getInetAddress().getHostAddress(), socket.getPort(),
true);
// Support all protocols except legacy SSL.
// The min SDK version prevents us having to worry about SSLv2. In future, this may be
// true of SSLv3 as well.
final String[] supportProtocols;
if (enableLegacySSL()) {
supportProtocols = sslSocket.getSupportedProtocols();
} else {
final List<String> supportedProtocols = new LinkedList<String>(Arrays.asList(
sslSocket.getSupportedProtocols()));
supportedProtocols.remove("SSLv3");
supportProtocols = new String[supportedProtocols.size()];
supportedProtocols.toArray(supportProtocols);
}
sslSocket.setEnabledProtocols(supportProtocols);
if (verifier != null
&& !verifier.verify(account.getServer(),
sslSocket.getSession())) {