privatevoid initialise() { if (!initialized) { synchronized (this) { if (!initialized) {
SSLContext context; try {
context = new JSSESSLContext(sslHostConfig.getSslProtocol());
context.init(null, null, null);
} catch (NoSuchAlgorithmException | KeyManagementException e) { // This is fatal for the connector so throw an exception to prevent // it from starting thrownew IllegalArgumentException(e);
}
String[] implementedProtocolsArray = context.getSupportedSSLParameters().getProtocols();
implementedProtocols = new HashSet<>(implementedProtocolsArray.length);
// Filter out SSLv2 from the list of implemented protocols (just in case // we are running on a JVM that supports it) since it is no longer // considered secure but allow SSLv2Hello. // Note SSLv3 is allowed despite known insecurities because some users // still have a requirement for it. for (String protocol : implementedProtocolsArray) {
String protocolUpper = protocol.toUpperCase(Locale.ENGLISH); if (!"SSLV2HELLO".equals(protocolUpper) && !"SSLV3".equals(protocolUpper)) { if (protocolUpper.contains("SSL")) {
log.debug(sm.getString("jsseUtil.excludeProtocol", protocol)); continue;
}
}
implementedProtocols.add(protocol);
}
if (implementedProtocols.size() == 0) {
log.warn(sm.getString("jsseUtil.noDefaultProtocols"));
}
String[] implementedCipherSuiteArray = context.getSupportedSSLParameters().getCipherSuites(); // The IBM JRE will accept cipher suites names SSL_xxx or TLS_xxx but // only returns the SSL_xxx form for supported cipher suites. Therefore // need to filter the requested cipher suites using both forms with an // IBM JRE. if (JreVendor.IS_IBM_JVM) {
implementedCiphers = new HashSet<>(implementedCipherSuiteArray.length * 2); for (String name : implementedCipherSuiteArray) {
implementedCiphers.add(name); if (name.startsWith("SSL")) {
implementedCiphers.add("TLS" + name.substring(3));
}
}
} else {
implementedCiphers = new HashSet<>(Arrays.asList(implementedCipherSuiteArray));
}
initialized = true;
}
}
}
}
}
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