106 lines
4.1 KiB
Java
106 lines
4.1 KiB
Java
package eu.siacs.conversations.utils;
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import android.os.Build;
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import android.util.Log;
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import androidx.annotation.RequiresApi;
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import org.conscrypt.Conscrypt;
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import java.lang.reflect.Method;
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import java.nio.charset.StandardCharsets;
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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.Collections;
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import java.util.LinkedList;
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import javax.net.ssl.SNIHostName;
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import javax.net.ssl.SSLContext;
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import javax.net.ssl.SSLParameters;
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import javax.net.ssl.SSLSession;
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import javax.net.ssl.SSLSocket;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.entities.Account;
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public class SSLSocketHelper {
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public static void setSecurity(final SSLSocket sslSocket) {
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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[0]);
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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 setHostname(final SSLSocket socket, final String hostname) {
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if (Conscrypt.isConscrypt(socket)) {
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Conscrypt.setHostname(socket, hostname);
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} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
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setHostnameNougat(socket, hostname);
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} else {
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setHostnameReflection(socket, hostname);
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}
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}
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private static void setHostnameReflection(final SSLSocket socket, final String hostname) {
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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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Log.e(Config.LOGTAG, "unable to set SNI name on socket (" + hostname + ")", e);
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}
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}
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@RequiresApi(api = Build.VERSION_CODES.N)
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private static void setHostnameNougat(final SSLSocket socket, final String hostname) {
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final SSLParameters parameters = new SSLParameters();
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parameters.setServerNames(Collections.singletonList(new SNIHostName(hostname)));
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socket.setSSLParameters(parameters);
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}
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private static void setApplicationProtocolReflection(final SSLSocket socket, final String protocol) {
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try {
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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(StandardCharsets.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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} catch (Throwable e) {
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Log.e(Config.LOGTAG,"unable to set ALPN on socket",e);
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}
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}
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public static void setApplicationProtocol(final SSLSocket socket, final String protocol) {
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if (Conscrypt.isConscrypt(socket)) {
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Conscrypt.setApplicationProtocols(socket, new String[]{protocol});
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} else {
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setApplicationProtocolReflection(socket, protocol);
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}
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}
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public static SSLContext getSSLContext() throws NoSuchAlgorithmException {
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try {
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return SSLContext.getInstance("TLSv1.3");
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} catch (NoSuchAlgorithmException e) {
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return SSLContext.getInstance("TLSv1.2");
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}
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}
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public static void log(Account account, SSLSocket socket) {
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SSLSession session = socket.getSession();
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Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": protocol=" + session.getProtocol() + " cipher=" + session.getCipherSuite());
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}
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}
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