/*
* @(#)AuthProvider.java 1.3 04/02/03
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.security;
import javax.security.auth.Subject;
import javax.security.auth.login.LoginException;
import javax.security.auth.callback.CallbackHandler;
/**
* This class defines login and logout methods for a provider.
*
* <p> While callers may invoke <code>login</code> directly,
* the provider may also invoke <code>login</code> on behalf of callers
* if it determines that a login must be performed
* prior to certain operations.
*
* @version 1.3, 02/03/04
* @since 1.5
*/
public abstract class AuthProvider extends Provider {
/**
* Constructs a provider with the specified name, version number,
* and information.
*
* @param name the provider name.
* @param version the provider version number.
* @param info a description of the provider and its services.
*/
protected AuthProvider(String name, double version, String info) {
super(name, version, info);
}
/**
* Log in to this provider.
*
* <p> The provider relies on a <code>CallbackHandler</code>
* to obtain authentication information from the caller
* (a PIN, for example). If the caller passes a <code>null</code>
* handler to this method, the provider uses the handler set in the
* <code>setCallbackHandler</code> method.
* If no handler was set in that method, the provider queries the
* <i>auth.login.defaultCallbackHandler</i> security property
* for the fully qualified class name of a default handler implementation.
* If the security property is not set,
* the provider is assumed to have alternative means
* for obtaining authentication information.
*
* @param subject the <code>Subject</code> which may contain
* principals/credentials used for authentication,
* or may be populated with additional principals/credentials
* after successful authentication has completed.
* This parameter may be <code>null</code>.
* @param handler the <code>CallbackHandler</code> used by
* this provider to obtain authentication information
* from the caller, which may be <code>null</code>
*
* @exception LoginException if the login operation fails
* @exception SecurityException if the caller does not pass a
* security check for
* <code>SecurityPermission("authProvider.<i>name</i>")</code>,
* where <i>name</i> is the value returned by
* this provider's <code>getName</code> method
*/
public abstract void login(Subject subject, CallbackHandler handler)
throws LoginException;
/**
* Log out from this provider.
*
* @exception LoginException if the logout operation fails
* @exception SecurityException if the caller does not pass a
* security check for
* <code>SecurityPermission("authProvider.<i>name</i>")</code>,
* where <i>name</i> is the value returned by
* this provider's <code>getName</code> method
*/
public abstract void logout() throws LoginException;
/**
* Set a <code>CallbackHandler</code>.
*
* <p> The provider uses this handler if one is not passed to the
* <code>login</code> method. The provider also uses this handler
* if it invokes <code>login</code> on behalf of callers.
* In either case if a handler is not set via this method,
* the provider queries the
* <i>auth.login.defaultCallbackHandler</i> security property
* for the fully qualified class name of a default handler implementation.
* If the security property is not set,
* the provider is assumed to have alternative means
* for obtaining authentication information.
*
* @param handler a <code>CallbackHandler</code> for obtaining
* authentication information, which may be <code>null</code>
*
* @exception SecurityException if the caller does not pass a
* security check for
* <code>SecurityPermission("authProvider.<i>name</i>")</code>,
* where <i>name</i> is the value returned by
* this provider's <code>getName</code> method
*/
public abstract void setCallbackHandler(CallbackHandler handler);
}
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