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Using reverse connection strategy for device with android version less than ICS

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Enabled cipher suites manually due to issues caused by DHE by older devices
This commit is contained in:
Vineet Garg 2015-08-25 01:06:49 +05:30
parent f908f5d8a1
commit b87aead06b
2 changed files with 20 additions and 0 deletions
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5
src/org/kde/kdeconnect/Backends/LanBackend/LanLinkProvider.java
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@ -424,6 +424,11 @@ public class LanLinkProvider extends BaseLinkProvider {
clientGroup = new NioEventLoopGroup(); clientGroup = new NioEventLoopGroup();
// Due to certificate request from SSL server to client, the certificate request message from device with latest android version to device with
// old android version causes a FATAL ALERT message stating that incorrect certificate request
// Server is disabled on these devices and using a reverse connection strategy. This works well for connection of these devices with kde
// and newer android versions. Although devices with android version less than ICS cannot connect to other devices who also have android version less
// than ICS because server is disabled on both
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
return; return;
} }

15
src/org/kde/kdeconnect/Helpers/SecurityHelpers/SslHelper.java
View File

@ -22,6 +22,7 @@ package org.kde.kdeconnect.Helpers.SecurityHelpers;
import android.content.Context; import android.content.Context;
import android.content.SharedPreferences; import android.content.SharedPreferences;
import android.os.Build;
import android.preference.PreferenceManager; import android.preference.PreferenceManager;
import android.provider.Settings; import android.provider.Settings;
import android.util.Base64; import android.util.Base64;
@ -45,6 +46,7 @@ import java.security.PublicKey;
import java.security.SecureRandom; import java.security.SecureRandom;
import java.security.cert.Certificate; import java.security.cert.Certificate;
import java.security.cert.X509Certificate; import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Calendar; import java.util.Calendar;
import java.util.Date; import java.util.Date;
import java.util.Formatter; import java.util.Formatter;
@ -204,6 +206,19 @@ public class SslHelper {
"TLSv1" "TLSv1"
}); });
// These cipher suites are most common of them that are accepted by kde and android during handshake
ArrayList<String> supportedCiphers = new ArrayList<>();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
supportedCiphers.add("TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256");
supportedCiphers.add("TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384");
supportedCiphers.add("TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA");
}
// Following ciphers are for and due to old devices
supportedCiphers.add("SSL_RSA_WITH_RC4_128_SHA");
supportedCiphers.add("SSL_RSA_WITH_RC4_128_MD5");
sslEngine.setEnabledCipherSuites(supportedCiphers.toArray(new String[supportedCiphers.size()]));
if (sslMode == SslMode.Client){ if (sslMode == SslMode.Client){
sslEngine.setUseClientMode(true); sslEngine.setUseClientMode(true);
}else{ }else{