public abstract class

StartTlsResponse

extends Object
implements ExtendedResponse
java.lang.Object
   ↳ javax.naming.ldap.StartTlsResponse
Known Direct Subclasses

Class Overview

This class implements the LDAPv3 Extended Response for StartTLS as defined in Lightweight Directory Access Protocol (v3): Extension for Transport Layer Security The object identifier for StartTLS is 1.3.6.1.4.1.1466.20037 and no extended response value is defined.

The Start TLS extended request and response 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 the StartTLS extended request and response classes as follows. 

 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, ...
 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;

See Also

Summary

Constants
String OID The StartTLS extended response's assigned object identifier is 1.3.6.1.4.1.1466.20037.
Protected Constructors
StartTlsResponse()
Constructs a StartTLS extended response.
Public Methods
abstract void close()
Closes the TLS connection gracefully and reverts back to the underlying connection.
byte[] getEncodedValue()
Retrieves the StartTLS response's ASN.1 BER encoded value.
String getID()
Retrieves the StartTLS response's object identifier string.
abstract SSLSession negotiate()
Negotiates a TLS session using the default SSL socket factory.
abstract SSLSession negotiate(SSLSocketFactory factory)
Negotiates a TLS session using an SSL socket factory.
abstract void setEnabledCipherSuites(String[] suites)
Overrides the default list of cipher suites enabled for use on the TLS connection.
abstract void setHostnameVerifier(HostnameVerifier verifier)
Sets the hostname verifier used by negotiate() after the TLS handshake has completed and the default hostname verification has failed.
[Expand]
Inherited Methods
From class java.lang.Object
From interface javax.naming.ldap.ExtendedResponse

Constants

public static final String OID

The StartTLS extended response's assigned object identifier is 1.3.6.1.4.1.1466.20037.

Constant Value: "1.3.6.1.4.1.1466.20037"

Protected Constructors

protected StartTlsResponse ()

Constructs a StartTLS extended response. A concrete subclass must have a public no-arg constructor.

Public Methods

public abstract void close ()

Closes the TLS connection gracefully and reverts back to the underlying connection.

Throws
IOException If an IO error was encountered while closing the TLS connection

public byte[] getEncodedValue ()

Retrieves the StartTLS response's ASN.1 BER encoded value. Since the response has no defined value, null is always returned.

Returns
  • The null value.

public String getID ()

Retrieves the StartTLS response's object identifier string.

Returns
  • The object identifier string, "1.3.6.1.4.1.1466.20037".

public abstract SSLSession negotiate ()

Negotiates a TLS session using the default SSL socket factory.

This method is equivalent to negotiate(null).

Returns
  • The negotiated SSL session
Throws
IOException If an IO error was encountered while establishing the TLS session.
See Also

public abstract SSLSession negotiate (SSLSocketFactory factory)

Negotiates a TLS session using an SSL socket factory.

Creates an SSL socket using the supplied SSL socket factory and attaches it to the existing connection. Performs the TLS handshake and returns the negotiated session information.

If cipher suites have been set via setEnabledCipherSuites then they are enabled before the TLS handshake begins.

Hostname verification is performed after the TLS handshake completes. The default hostname verification performs a match of the server's hostname against the hostname information found in the server's certificate. If this verification fails and no callback has been set via setHostnameVerifier then the negotiation fails. If this verification fails and a callback has been set via setHostnameVerifier, then the callback is used to determine whether the negotiation succeeds.

If an error occurs then the SSL socket is closed and an IOException is thrown. The underlying connection remains intact.

Parameters
factory The possibly null SSL socket factory to use. If null, the default SSL socket factory is used.
Returns
  • The negotiated SSL session
Throws
IOException If an IO error was encountered while establishing the TLS session.
See Also

public abstract void setEnabledCipherSuites (String[] suites)

Overrides the default list of cipher suites enabled for use on the TLS connection. The cipher suites must have already been listed by SSLSocketFactory.getSupportedCipherSuites() as being supported. Even if a suite has been enabled, it still might not be used because the peer does not support it, or because the requisite certificates (and private keys) are not available.

Parameters
suites The non-null list of names of all the cipher suites to enable.
See Also

public abstract void setHostnameVerifier (HostnameVerifier verifier)

Sets the hostname verifier used by negotiate() after the TLS handshake has completed and the default hostname verification has failed. setHostnameVerifier() must be called before negotiate() is invoked for it to have effect. If called after negotiate(), this method does not do anything.

Parameters
verifier The non-null hostname verifier callback.
See Also