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-rw-r--r--src/main/java/de/thedevstack/conversationsplus/utils/SSLSocketHelper.java73
1 files changed, 73 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/SSLSocketHelper.java b/src/main/java/de/thedevstack/conversationsplus/utils/SSLSocketHelper.java
new file mode 100644
index 00000000..1842e897
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/SSLSocketHelper.java
@@ -0,0 +1,73 @@
+package de.thedevstack.conversationsplus.utils;
+
+import android.os.Build;
+
+import java.lang.reflect.Method;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedList;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocket;
+import javax.net.ssl.SSLSocketFactory;
+
+public class SSLSocketHelper {
+
+ public static void setSecurity(final SSLSocket sslSocket) throws NoSuchAlgorithmException {
+ final String[] supportProtocols;
+ final Collection<String> supportedProtocols = new LinkedList<>(
+ Arrays.asList(sslSocket.getSupportedProtocols()));
+ supportedProtocols.remove("SSLv3");
+ supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
+
+ sslSocket.setEnabledProtocols(supportProtocols);
+
+ final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
+ sslSocket.getSupportedCipherSuites());
+ if (cipherSuites.length > 0) {
+ sslSocket.setEnabledCipherSuites(cipherSuites);
+ }
+ }
+
+ public static void setSNIHost(final SSLSocketFactory factory, final SSLSocket socket, final String hostname) {
+ if (factory instanceof android.net.SSLCertificateSocketFactory && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
+ ((android.net.SSLCertificateSocketFactory) factory).setHostname(socket, hostname);
+ } else {
+ try {
+ socket.getClass().getMethod("setHostname", String.class).invoke(socket, hostname);
+ } catch (Throwable e) {
+ // ignore any error, we just can't set the hostname...
+ }
+ }
+ }
+
+ public static void setAlpnProtocol(final SSLSocketFactory factory, final SSLSocket socket, final String protocol) {
+ try {
+ if (factory instanceof android.net.SSLCertificateSocketFactory && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
+ // can't call directly because of @hide?
+ //((android.net.SSLCertificateSocketFactory)factory).setAlpnProtocols(new byte[][]{protocol.getBytes("UTF-8")});
+ android.net.SSLCertificateSocketFactory.class.getMethod("setAlpnProtocols", byte[][].class).invoke(socket, new Object[]{new byte[][]{protocol.getBytes("UTF-8")}});
+ } else {
+ final Method method = socket.getClass().getMethod("setAlpnProtocols", byte[].class);
+ // the concatenation of 8-bit, length prefixed protocol names, just one in our case...
+ // http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-04#page-4
+ final byte[] protocolUTF8Bytes = protocol.getBytes("UTF-8");
+ final byte[] lengthPrefixedProtocols = new byte[protocolUTF8Bytes.length + 1];
+ lengthPrefixedProtocols[0] = (byte) protocol.length(); // cannot be over 255 anyhow
+ System.arraycopy(protocolUTF8Bytes, 0, lengthPrefixedProtocols, 1, protocolUTF8Bytes.length);
+ method.invoke(socket, new Object[]{lengthPrefixedProtocols});
+ }
+ } catch (Throwable e) {
+ // ignore any error, we just can't set the alpn protocol...
+ }
+ }
+
+ public static SSLContext getSSLContext() throws NoSuchAlgorithmException {
+ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+ return SSLContext.getInstance("TLSv1.2");
+ } else {
+ return SSLContext.getInstance("TLS");
+ }
+ }
+}