A solution of SSO plus LDAP for Liferay Portal 5.3 and Alfresco Portlet 3.1 E with full RESTFul Integration. 

1. First please download an example Liferay Portal 5.3, Alfresco Portlet 3.1 E, LDAP (ADS) and SSO CAS. 

liferay-5.3-tomcat-6.0.20.zip

Download from (save link as ...) 

http://liferay.cignex.com

unzip it in your local machine.

2. Then create database (this is configurable) MySQL 

for Liferay Portal 5.3
create database lportal;
grant all on liferay53.* to 'liferay'@'localhost' identified by 'liferay' with grant option;
grant all on liferay53.* to 'liferay'@'localhost.localdomain' identified by 'liferay' with grant option;

for Alfresco Portlet
create database alfresco31;
grant all on alfresco31.* to 'alfresco'@'localhost' identified by 'alfresco' with grant option;
grant all on alfresco31.* to 'alfresco'@'localhost.localdomain' identified by 'alfresco' with grant option;

3. Start your AS from unzipped file
tomcat/bin/startup.bat or sh startup.sh 

Note that, you may need to reset "dir.root" as "dir.root=/opt/sso/liferay53/alf_data" in custom-repository.

Go to http://localhost:8080/c/portal/login

press sign in 

You may need to configure LDAP:
ldap://docs.cignex.com:10389
ou=users,ou=system
uid=admin,ou=system

and configure SSO
https://docs.cignex.com/cas-web/login 
https://docs.cignex.com/cas-web/logout
https://docs.cignex.com/cas-web/proxyValidate

note that: 

you need to set "How do users authenticate?" "by Screen Name" under "Authentication->general";
you need to set "Authentication Search Filter" "(cn=@screen_name@)" under "Authentication->LDAP"; 

4. In CAS login page (https://docs.cignex.com/cas-web), login 

possible users in LDAP server (docs.cignex.com) (configurable) 
jonas/jonas 
jane/jane 

... 

After login in CAS, you should be in Liferay Portal with your login name. No need relogin in Liferay Portal.

Add Alfresco Ext Client. You should be in Alfresco Portlet with your login name. No need relogin in Alfresco Portlet. 

Get it?  

Note: How to set up CAS server?

1) download cas-web.war from http://liferay.cignex.com
2) Set up SSL for Tomcat
3) set up LDAP
4) drop cas-web.war to $TOMCAT_DIR/webapps/

Good luck.

Jonas Yuan
CIGNEX Technologies, Inc.
Email: jonas@cignex.com

July 11, 2009