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