com.jalios.jcms.authentication.handlers
Class HttpDigestAuthenticationHandler

java.lang.Object
  com.jalios.jcms.authentication.AuthenticationHandler
      com.jalios.jcms.authentication.handlers.HttpDigestAuthenticationHandler

All Implemented Interfaces:

PluginComponent, Comparable<AuthenticationHandler>

public class HttpDigestAuthenticationHandler
extends AuthenticationHandler

Authenticates user using HTTP Authorization.

In order to use this handler YOU MUST perform the following operation :

1. Prior to using the handler, you MUST save the Members' hash 'HA1' in the ExtraData of each Member allowed to use this authentication.

       Member mbr = ...;
       Member updated = (Member) mbr.getUpdateInstance();
       updated.setExtraDataMap(Util.getHashMap(mbr.getExtraDataMap()));
       HttpDigestAuthenticationHandler.putHA1InMemberExtraData(updated, "MyRealm", "The member's clear text password");
       updated.performUpdate(admin);

   Note : building the HA1 requires the clear text password of the user but the password is NOT saved (see explanation below).
2. To request an HTTP Authentication, invoke the method setHttpDigestAuthorizationHeader(HttpSession, HttpServletResponse, String).
   This will trigger a HTTP Authorization response, the handler will deal with decoding of the next request.
   For example :

   <%@ include file="/jcore/doInitPage.jsp" %><%
      %><%@ page import="com.jalios.jcms.authentication.handlers.HttpDigestAuthenticationHandler" %><%
    
        if (loggedMember == null) {
          HttpDigestAuthenticationHandler.setHttpDigestAuthorizationHeader(session, response, "MyRealm");
          return;
        }
      %>

HA1 explanation: : HTTP Digest authentication requires either the password in clear text form (we definitely do not want that) or the hash HA1 (md5(user:realm:clear-text-password)) on the server side.
That's why the HA1 MUST be saved from the clear text password of the Member when it's available (for example using a DataController when editing its profile).

More informations on Digest authentication can be found here :

• http://tools.ietf.org/html/rfc2617
• http://en.wikipedia.org/wiki/Digest_access_authentication
• http://ryandaigle.com/articles/2009/1/30/what-s-new-in-edge-rails-http-digest-authentication

Since:

jcms-6.1.0

Version:

$Revision: 23913 $

Author:

Olivier Jaquemet

Field Summary

static int	ORDER_DIGEST_HTTP_HANDLER Order used by the HttpDigestAuthenticationHandler
static String	REVISION

Fields inherited from class com.jalios.jcms.authentication.AuthenticationHandler

channel, GENERIC_BAD_AUTHENTICATION_MSG

Method Summary

static Member	checkAuthenticationFromHTTPAuthorization(javax.servlet.http.HttpServletRequest request) Returns the member corresponding to the HTTP Authorization header available in the request.
static String	getDefaultRealm() Retrieve the default REALM used for HTTP Digest authentication.
static String	getExtraDataKey(String realm) Retrieve the ExtraData key used to store the HASH HA1 for the specified realm
static String	getHA1(Member member, String realm, String clearTextPassword) Compute and retrieve the HASH key HA1 for the specified parameters
static String	getHA1FromMemberExtraData(Member member, String realm) Retrieve the previously stored HASH key HA1 frm the member's ExtraData (or ExtraDBData for DBMember)
static String	getHA2(javax.servlet.http.HttpServletRequest request) Compute and retrieve the HASH key HA2 for the specified request
static HttpDigestAuthenticationHandler	getInstance()
void	login(AuthenticationContext ctxt) Authenticate a member.
static void	putHA1InMemberExtraData(Member member, String realm, String clearTextPassword) Compute and add the HASH key HA1 in the member's ExtraData (or ExtraDBData for DBMember)
static String	removeSurroundingQuote(String str)
static void	setHttpDigestAuthorizationHeader(javax.servlet.http.HttpSession session, javax.servlet.http.HttpServletResponse response, String realm) Set a 401 status code (UNAUTHORIZED) and add the "WWW-Authenticate" header to the given response using the given realm.

Methods inherited from class com.jalios.jcms.authentication.AuthenticationHandler

compareTo, equals, getOrder, init, loadProperties, logout, setOrder

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

REVISION

public static final String REVISION

See Also:

Constant Field Values

ORDER_DIGEST_HTTP_HANDLER

public static final int ORDER_DIGEST_HTTP_HANDLER

Order used by the HttpDigestAuthenticationHandler

See Also:

Constant Field Values

Method Detail

getInstance

public static final HttpDigestAuthenticationHandler getInstance()

login

public void login(AuthenticationContext ctxt)
           throws IOException

Description copied from class: AuthenticationHandler

Authenticate a member.
This method is invoked by the authentication chain on each request.
A typical implementation of this method would follow the following pattern :

1. Examine informations required to perform the authentication through the AuthenticationContext object (request, response, login.. etc)
2. Perform your authentication before chain invokation and set the logged Member AuthenticationContext.setLoggedMember(com.jalios.jcms.Member)
3. a) Either invoke the next entity in the chain using AuthenticationContext.doChain(),
4. b) or else skip the chain invokation and block other authentication handler of the chain (do this with caution...)
5. Perform redirection, set information/warning/error message or any other process, after chain invokation, using AuthenticationContext.

Default implementation is to invoke the next handler in the chain.

Overrides:

login in class AuthenticationHandler

Parameters:

ctxt - the AuthenticationContext used for this login

Throws:

IOException

checkAuthenticationFromHTTPAuthorization

public static final Member checkAuthenticationFromHTTPAuthorization(javax.servlet.http.HttpServletRequest request)
                                                             throws IOException

Returns the member corresponding to the HTTP Authorization header available in the request.
http://www.ietf.org/rfc/rfc2617.txt
We only handle the "DIGEST" Authentication Scheme.

Parameters:

request - the request where to look for HTTP Authorization header

Returns:

the authenticated member or null if not found

Throws:

IOException - if the underneath login operation with the userId/password could not be performed

Since:

jcms-5.5.0

removeSurroundingQuote

public static String removeSurroundingQuote(String str)

setHttpDigestAuthorizationHeader

public static final void setHttpDigestAuthorizationHeader(javax.servlet.http.HttpSession session,
                                                          javax.servlet.http.HttpServletResponse response,
                                                          String realm)

Set a 401 status code (UNAUTHORIZED) and add the "WWW-Authenticate" header to the given response using the given realm.
Use this methods to request an HTTP Authorization using the "Basic" Authentication Scheme.

Parameters:

session - the current session being used for authentication

response - the HttpServletResponse of which to set status and add header

realm - the Realm to set in the response

Since:

jcms-5.5.0

getHA1

public static String getHA1(Member member,
                            String realm,
                            String clearTextPassword)

Compute and retrieve the HASH key HA1 for the specified parameters

Parameters:

member - the member for which the HASH is generated

realm - the HASH realm

clearTextPassword - the member's clear text password

Returns:

the hash MD5( "{login}:{realm}:{clearTextPassword}" )

putHA1InMemberExtraData

public static void putHA1InMemberExtraData(Member member,
                                           String realm,
                                           String clearTextPassword)

Compute and add the HASH key HA1 in the member's ExtraData (or ExtraDBData for DBMember)

Parameters:

member - the member for which hash is set

realm - the HASH realm

clearTextPassword - the clear text password of the user, REQUIRED

getHA1FromMemberExtraData

public static String getHA1FromMemberExtraData(Member member,
                                               String realm)

Retrieve the previously stored HASH key HA1 frm the member's ExtraData (or ExtraDBData for DBMember)

Parameters:

member - the member for which hash is retrieved

realm - the HASH realm

Returns:

the previously stored hash or null if none was stored

getExtraDataKey

public static String getExtraDataKey(String realm)

Retrieve the ExtraData key used to store the HASH HA1 for the specified realm

Parameters:

realm - the realm

Returns:

the extradata key (eg. "authentication.digest.myrealm.ha1")

getHA2

public static String getHA2(javax.servlet.http.HttpServletRequest request)

Compute and retrieve the HASH key HA2 for the specified request

Parameters:

request - the HttpServletRequest for which the HA2 is being generated

Returns:

the hash MD5( "{login}:{realm}:{clearTextPassword}" )

getDefaultRealm

public static String getDefaultRealm()

Retrieve the default REALM used for HTTP Digest authentication.

Returns:

the default realm specified by property "authentication.digest.default-realm" or "JCMS" is property is empty.