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Android: TLS 1.3 with OkHttp and Conscrypt on all Android versions (Tested on 4.1+)
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// Android 4.1+ | |
dependencies { | |
implementation 'com.squareup.okhttp3:okhttp:3.12.13' | |
implementation 'org.conscrypt:conscrypt-android:2.5.2' | |
} | |
// Android 5.0+ | |
dependencies { | |
implementation 'com.squareup.okhttp3:okhttp:4.10.0' | |
implementation 'org.conscrypt:conscrypt-android:2.5.2' | |
} |
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// Init Conscrypt | |
Provider conscrypt = Conscrypt.newProvider(); | |
// Add as provider | |
Security.insertProviderAt(conscrypt, 1); | |
// Init OkHttp | |
OkHttpClient.Builder okHttpBuilder = new OkHttpClient() | |
.newBuilder() | |
.connectionSpecs(Collections.singletonList(ConnectionSpec.RESTRICTED_TLS)); | |
// OkHttp 3.12.x | |
// ConnectionSpec.COMPATIBLE_TLS = TLS1.0 | |
// ConnectionSpec.MODERN_TLS = TLS1.0 + TLS1.1 + TLS1.2 + TLS 1.3 | |
// ConnectionSpec.RESTRICTED_TLS = TLS 1.2 + TLS 1.3 | |
// OkHttp 3.13+ | |
// ConnectionSpec.COMPATIBLE_TLS = TLS1.0 + TLS1.1 + TLS1.2 + TLS 1.3 | |
// ConnectionSpec.MODERN_TLS = TLS1.2 + TLS 1.3 | |
// ConnectionSpec.RESTRICTED_TLS = TLS 1.2 + TLS 1.3 | |
try { | |
X509TrustManager tm = Conscrypt.getDefaultX509TrustManager(); | |
SSLContext sslContext = SSLContext.getInstance("TLS", conscrypt); | |
sslContext.init(null, new TrustManager[] { tm }, null); | |
okHttpBuilder.sslSocketFactory(new InternalSSLSocketFactory(sslContext.getSocketFactory()), tm); | |
} catch (Exception e) { | |
e.printStackTrace(); | |
} | |
// Build OkHttp | |
OkHttpClient okHttpClient = okHttpBuilder.build(); |
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import java.io.IOException; | |
import java.net.InetAddress; | |
import java.net.Socket; | |
import java.net.UnknownHostException; | |
import javax.net.ssl.SSLSocket; | |
import javax.net.ssl.SSLSocketFactory; | |
public final class InternalSSLSocketFactory extends SSLSocketFactory { | |
private final SSLSocketFactory mSSLSocketFactory; | |
public InternalSSLSocketFactory(SSLSocketFactory sslSocketFactory) { | |
this.mSSLSocketFactory = sslSocketFactory; | |
} | |
@Override | |
public String[] getDefaultCipherSuites() { | |
return mSSLSocketFactory.getDefaultCipherSuites(); | |
} | |
@Override | |
public String[] getSupportedCipherSuites() { | |
return mSSLSocketFactory.getSupportedCipherSuites(); | |
} | |
@Override | |
public Socket createSocket() throws IOException { | |
return enableTLSOnSocket(mSSLSocketFactory.createSocket()); | |
} | |
@Override | |
public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException { | |
return enableTLSOnSocket(mSSLSocketFactory.createSocket(s, host, port, autoClose)); | |
} | |
@Override | |
public Socket createSocket(String host, int port) throws IOException, UnknownHostException { | |
return enableTLSOnSocket(mSSLSocketFactory.createSocket(host, port)); | |
} | |
@Override | |
public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException, UnknownHostException { | |
return enableTLSOnSocket(mSSLSocketFactory.createSocket(host, port, localHost, localPort)); | |
} | |
@Override | |
public Socket createSocket(InetAddress host, int port) throws IOException { | |
return enableTLSOnSocket(mSSLSocketFactory.createSocket(host, port)); | |
} | |
@Override | |
public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException { | |
return enableTLSOnSocket(mSSLSocketFactory.createSocket(address, port, localAddress, localPort)); | |
} | |
private Socket enableTLSOnSocket(Socket socket) { | |
//if(socket instanceof SSLSocket) ((SSLSocket) socket).setEnabledProtocols(new String[] {"TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"}); | |
if(socket instanceof SSLSocket) ((SSLSocket) socket).setEnabledProtocols(new String[] {"TLSv1.2", "TLSv1.3"}); | |
return socket; | |
} | |
} |
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Request request = new Request.Builder() | |
.url("https://tls13.1d.pw") // You can try another TLS 1.3 capable HTTPS server | |
.build(); | |
okHttpClient.newCall(request) | |
.enqueue(new Callback() { | |
@Override | |
public void onFailure(final Call call, IOException e) { | |
e.printStackTrace(); | |
Log.d(LOG, "onFailure()"); | |
} | |
@Override | |
public void onResponse(Call call,final Response response) throws IOException { | |
Log.d(LOG, "onResponse() tlsVersion=" + response.handshake().tlsVersion()); | |
Log.d(LOG, "onResponse() cipherSuite=" + response.handshake().cipherSuite().toString()); | |
// D/TestApp##: onResponse() tlsVersion=TLS_1_3 | |
// D/TestApp##: onResponse() cipherSuite=TLS_AES_256_GCM_SHA384 | |
} | |
}); |
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It doesn't work in my case on my specific API 19 device, but works in emulator