* StartTlsRequest/StartTlsResponse are used to establish * a TLS connection over the existing LDAP connection associated with * the JNDI context on which extendedOperation() is invoked. * Typically, a JNDI program uses these classes as follows. *
* * @since 1.4 * @see StartTlsResponse * @author Vincent Ryan */ public class StartTlsRequest implements ExtendedRequest { // Constant /** * The StartTLS extended request's assigned object identifier * is 1.3.6.1.4.1.1466.20037. */ public static final String OID = "1.3.6.1.4.1.1466.20037"; // Constructors /** * Constructs a StartTLS extended request. */ public StartTlsRequest() { } // ExtendedRequest methods /** * Retrieves the StartTLS request's object identifier string. * * @return The object identifier string, "1.3.6.1.4.1.1466.20037". */ public String getID() { return OID; } /** * Retrieves the StartTLS request's ASN.1 BER encoded value. * Since the request has no defined value, null is always * returned. * * @return The null value. */ public byte[] getEncodedValue() { return null; } /** * Creates an extended response object that corresponds to the * LDAP StartTLS extended request. ** import javax.naming.ldap.*; * * // Open an LDAP association * LdapContext ctx = new InitialLdapContext(); * * // Perform a StartTLS extended operation * StartTlsResponse tls = * (StartTlsResponse) ctx.extendedOperation(new StartTlsRequest()); * * // Open a TLS connection (over the existing LDAP association) and get details * // of the negotiated TLS session: cipher suite, peer certificate, etc. * SSLSession session = tls.negotiate(); * * // ... use ctx to perform protected LDAP operations * * // Close the TLS connection (revert back to the underlying LDAP association) * tls.close(); * * // ... use ctx to perform unprotected LDAP operations * * // Close the LDAP association * ctx.close; *
* The result must be a concrete subclass of StartTlsResponse * and must have a public zero-argument constructor. *
* This method locates the implementation class by locating * configuration files that have the name: *
* META-INF/services/javax.naming.ldap.StartTlsResponse ** The configuration files and their corresponding implementation classes must * be accessible to the calling thread's context class loader. *
* Each configuration file should contain a list of fully-qualified class * names, one per line. Space and tab characters surrounding each name, as * well as blank lines, are ignored. The comment character is '#' * (0x23); on each line all characters following the first comment * character are ignored. The file must be encoded in UTF-8. *
* This method will return an instance of the first implementation * class that it is able to load and instantiate successfully from * the list of class names collected from the configuration files. * This method uses the calling thread's context classloader to find the * configuration files and to load the implementation class. *
* If no class can be found in this way, this method will use * an implementation-specific way to locate an implementation. * If none is found, a NamingException is thrown. * * @param id The object identifier of the extended response. * Its value must be "1.3.6.1.4.1.1466.20037" or null. * Both values are equivalent. * @param berValue The possibly null ASN.1 BER encoded value of the * extended response. This is the raw BER bytes * including the tag and length of the response value. * It does not include the response OID. * Its value is ignored because a Start TLS response * is not expected to contain any response value. * @param offset The starting position in berValue of the bytes to use. * Its value is ignored because a Start TLS response * is not expected to contain any response value. * @param length The number of bytes in berValue to use. * Its value is ignored because a Start TLS response * is not expected to contain any response value. * @return The StartTLS extended response object. * @exception NamingException If a naming exception was encountered * while creating the StartTLS extended response object. */ public ExtendedResponse createExtendedResponse(String id, byte[] berValue, int offset, int length) throws NamingException { // Confirm that the object identifier is correct if ((id != null) && (!id.equals(OID))) { throw new ConfigurationException( "Start TLS received the following response instead of " + OID + ": " + id); } StartTlsResponse resp = null; Iterator ps = Service.providers(StartTlsResponse.class, getContextClassLoader()); while (resp == null && privilegedHasNext(ps)) { resp = (StartTlsResponse)ps.next(); } if (resp != null) { return resp; } try { VersionHelper helper = VersionHelper.getVersionHelper(); Class clas = helper.loadClass( "com.sun.jndi.ldap.ext.StartTlsResponseImpl"); resp = (StartTlsResponse) clas.newInstance(); } catch (IllegalAccessException e) { throw wrapException(e); } catch (InstantiationException e) { throw wrapException(e); } catch (ClassNotFoundException e) { throw wrapException(e); } return resp; } /* * Wrap an exception, thrown while attempting to load the StartTlsResponse * class, in a configuration exception. */ private ConfigurationException wrapException(Exception e) { ConfigurationException ce = new ConfigurationException( "Cannot load implementation of javax.naming.ldap.StartTlsResponse"); ce.setRootCause(e); return ce; } /* * Acquire the class loader associated with this thread. */ private final ClassLoader getContextClassLoader() { return (ClassLoader) AccessController.doPrivileged( new PrivilegedAction() { public Object run() { return Thread.currentThread().getContextClassLoader(); } } ); } private final static boolean privilegedHasNext(final Iterator iter) { Boolean answer = (Boolean) AccessController.doPrivileged( new PrivilegedAction() { public Object run() { return new Boolean(iter.hasNext()); } }); return answer.booleanValue(); } private static final long serialVersionUID = 4441679576360753397L; }