Source:
public synchronized SslHandler getSslHandler(ByteBufAllocator alloc) throws Exception { SSLEngine engine; if (sslProvider.equals(TransportConstants.OPENSSL_PROVIDER)) { engine = loadOpenSslEngine(alloc); } else { engine = loadJdkSslEngine(); } engine.setUseClientMode(false); if (needClientAuth) { engine.setNeedClientAuth(true); } if (wantClientAuth) { engine.setWantClientAuth(true); } String[] originalProtocols = engine.getEnabledProtocols(); if (enabledCipherSuites != null) { try { engine.setEnabledCipherSuites(SSLSupport.parseCommaSeparatedListIntoArray(enabledCipherSuites)); } catch (IllegalArgumentException e) { ActiveMQServerLogger.LOGGER.invalidCipherSuite(SSLSupport.parseArrayIntoCommandSeparatedList(engine.getSupportedCipherSuites())); throw e; } } if (enabledProtocols != null) { try { engine.setEnabledProtocols(SSLSupport.parseCommaSeparatedListIntoArray(enabledProtocols)); } catch (IllegalArgumentException e) { ActiveMQServerLogger.LOGGER.invalidProtocol(SSLSupport.parseArrayIntoCommandSeparatedList(engine.getSupportedProtocols())); throw e; } } else { engine.setEnabledProtocols(originalProtocols); } String[] protocols = engine.getEnabledProtocols(); Set<String> set = new HashSet<>(); for (String s : protocols) { if (s.equalsIgnoreCase("SSLv3") || s.equals("SSLv2Hello")) { if (!warningPrinted.get()) { ActiveMQServerLogger.LOGGER.disallowedProtocol(s, name); } continue; } set.add(s); } warningPrinted.set(true); engine.setEnabledProtocols(set.toArray(new String[set.size()])); if (verifyHost) { SSLParameters sslParameters = engine.getSSLParameters(); sslParameters.setEndpointIdentificationAlgorithm("HTTPS"); engine.setSSLParameters(sslParameters); } return new SslHandler(engine); }

Target:
public synchronized SslHandler getSslHandler(ByteBufAllocator alloc) throws Exception { SSLEngine engine; if (sslProvider.equals(TransportConstants.OPENSSL_PROVIDER)) { engine = loadOpenSslEngine(alloc); } else { engine = loadJdkSslEngine(); } engine.setUseClientMode(false); if (needClientAuth) { engine.setNeedClientAuth(true); } else if (wantClientAuth) { engine.setWantClientAuth(true); } String[] originalProtocols = engine.getEnabledProtocols(); if (enabledCipherSuites != null) { try { engine.setEnabledCipherSuites(SSLSupport.parseCommaSeparatedListIntoArray(enabledCipherSuites)); } catch (IllegalArgumentException e) { ActiveMQServerLogger.LOGGER.invalidCipherSuite(SSLSupport.parseArrayIntoCommandSeparatedList(engine.getSupportedCipherSuites())); throw e; } } if (enabledProtocols != null) { try { engine.setEnabledProtocols(SSLSupport.parseCommaSeparatedListIntoArray(enabledProtocols)); } catch (IllegalArgumentException e) { ActiveMQServerLogger.LOGGER.invalidProtocol(SSLSupport.parseArrayIntoCommandSeparatedList(engine.getSupportedProtocols())); throw e; } } else { engine.setEnabledProtocols(originalProtocols); } String[] protocols = engine.getEnabledProtocols(); Set<String> set = new HashSet<>(); for (String s : protocols) { if (s.equalsIgnoreCase("SSLv3") || s.equals("SSLv2Hello")) { if (!warningPrinted.get()) { ActiveMQServerLogger.LOGGER.disallowedProtocol(s, name); } continue; } set.add(s); } warningPrinted.set(true); engine.setEnabledProtocols(set.toArray(new String[set.size()])); if (verifyHost) { SSLParameters sslParameters = engine.getSSLParameters(); sslParameters.setEndpointIdentificationAlgorithm("HTTPS"); engine.setSSLParameters(sslParameters); } return new SslHandler(engine); }