Commit b1fbb9cc authored by Xavier Guimard's avatar Xavier Guimard

0.9.4 was missing in tags...

git-svn-id: svn://svn.forge.objectweb.org/svnroot/lemonldap/tags/lemonldap-ng_version_0_9_4@708 1dbb9719-a921-0410-b57f-c3a383c2c641
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LEMONLDAP::NG INSTALLATION
Lemonldap::NG is a modular Web-SSO based on Apache::Session modules. It
simplifies the build of a protected area with a few changes in the application.
It manages both authentication and authorization and provides headers for
accounting. So you can have a full AAA protection.
See README file to known how it works.
----------------------
I - QUICK INSTALLATION
----------------------
The proposed example use a protected site named test.example.com. Non
authenticated users are redirected to auth.example.com.
1.1 - PREREQ
------------
1.1.1 - Software
To use Lemonldap::NG, you have to run a LDAP server and of course an Apache
server compiled with mod-perl (version 1.3 or 2.x). Generaly, the version of
Apache proposed with your Linux distribution match, but some distributions used
an experimental version of mod_perl with Apache2 (mod_perl-1.99) which does
not work with Lemonldap::NG. With such distributions (like Debian-3.1), you
have to use Apache-1.3 or to use a mod_perl backport (www.backports.org
package for Debian works fine).
1.1.2 - Perl prereq
Perl modules:
Apache::Session, Net::LDAP, MIME::Base64, CGI, LWP::UserAgent, Cache::Cache,
DBI, XML::Simple, SOAP::Lite, HTML::Template, XML::LibXML, XML::LibXSLT
With Debian:
apt-get install libapache-session-perl libnet-ldap-perl libcache-cache-perl \
libdbi-perl perl-modules libwww-perl libcache-cache-perl \
libxml-simple-perl libhtml-template-perl libsoap-lite-perl \
libxml-libxml-perl libxml-libxslt-perl
1.2 - BUILDING
--------------
1.2.1 - Complete install
$ tar xzf lemonldap-ng-*.tar.gz
$ cd lemonldap-ng-*
$ make && make test
$ sudo make install
By default, all is installed in /usr/local/lemonldap-ng except Perl libraries
which are installed in a directory included in @INC.
1.2.2 - Install on Debian
$ tar xzf lemonldap-ng-*.tar.gz
$ cd lemonldap-ng-*
$ debuild
$ sudo dpkg -i ../*lemonldap-ng*.deb
Here, all is installed in /var/lib/lemonldap-ng, /etc/lemonldap-ng except Perl
libraries which are installed in /usr/share/perl5/Lemonldap/NG/
1.3 - EXAMPLE CONFIGURATION
---------------------------
If you have build Debian packages, configuration is done by Debconf. See
/usr/share/doc/liblemonldap-ng-conf/README.Debian to use it.
After build, you have a new file named example/apache.conf. You just have to
include this file in Apache configuration:
# in httpd.conf (with Apache1)
include /path/to/lemonldap-ng/source/example/apache.conf
# or in apache2.conf (with Apache2)
include /path/to/lemonldap-ng/source/example/apache2.conf
Modify your /etc/hosts file to include:
127.0.0.1 auth.example.com test1.example.com manager.example.com test2.example.com
Use a browser to connect to http://manager.example.com/ and specify your LDAP
settings. If you don't set managerDn and managerPassword, Lemonldap::NG will
use an anonymous bind to find user dn.
Next, restart Apache use your prefered browser and try to connect to
http://test1.example.com/. You'll be redirect to auth.example.com. Try
to authenticate yourself with a valid account and the protected page will
appear. You will find other explanations on this page.
the file /usr/local/lemonldap-ng/etc/storage.conf
(/etc/lemonldap-ng/storage.conf on Debian systems) can be modified to change
configuration database.
-------------------------
2 - ADVANCED INSTALLATION
-------------------------
It is recommended to install the example first then to adapt it.
2.1 - PREREQ
2.1.1 - Apache
To use Lemonldap::NG, you have to run a LDAP server and of course an Apache
server compiled with mod-perl (version 1.3 or 2.x). Generaly, the version of
Apache proposed with your Linux distribution match, but some distributions used
an experimental version of mod_perl with Apache2 (mod_perl-1.99) which does
not work with Lemonldap::NG. With such distributions (like Debian-3.1), you
have to use Apache-1.3 or to use a mod_perl backport (www.backports.org
package for Debian works fine).
For Apache2, you can use both mpm-worker and mpm-prefork. Mpm-worker works
faster and Lemonldap::NG use the thread system for best performance. If you
have to use mpm-prefork (for example if you use PHP), Lemonldap::NG will work
anyway.
You can use Lemonldap::NG in an heterogene world: the authentication portal and
the manager can work in any version of Apache 1.3 or more even if mod_perl is
not compiled, with ModPerl::Registry or not... Only the handler (site protector)
need mod_perl. The different handlers can run on different servers with
different versions of Apache/mod_perl.
2.1.2 - Perl prereq
Warning: Handler and Portal parts both need Lemonldap::NG::Manager components
to access to configuration.
Manager:
--------
Apache::Session, MIME::Base64, CGI, LWP::UserAgent, DBI, XML::Simple,
SOAP::Lite, XML::LibXML, XML::LibXSLT, Lemonldap::NG::Common
With Debian:
apt-get install perl-modules libxml-simple-perl libdbi-perl libwww-perl
# If you want to use SOAP
apt-get install libsoap-lite-perl
Portal:
-------
Apache::Session, Net::LDAP, MIME::Base64, CGI, Cache::Cache, DBI, XML::Simple,
SOAP::Lite, HTML::Template, XML::LibXML, Lemonldap::NG::Common
With Debian:
apt-get install libapache-session-perl libnet-ldap-perl perl-modules
Handler:
--------
Apache::Session, MIME::Base64, CGI, LWP::UserAgent, Cache::Cache, DBI,
XML::Simple, SOAP::Lite, Lemonldap::NG::Common
With Debian:
apt-get install libapache-session-perl libwww-perl libcache-cache-perl
2.2 - SOFTWARE INSTALLATION
---------------------------
If you just want to install a handler or a portal or a manager:
$ tar xzf lemonldap-ng-*.tar.gz
$ cd lemonldap-ng-*/Lemonldap-NG-(Portal|Handler|Manager)
$ perl Makefile.PL && make && make test
$ sudo make install
else for a complete install:
$ tar xzf lemonldap-ng-*.tar.gz
$ cd lemonldap-ng-*
$ make && make test
$ sudo make install
See prereq in §1.1.2
2.3 - LEMONLDAP::NG INSTALLATION
--------------------------------
2.3.1 - Database configuration
2.3.1.1 - Lemonldap::NG Configuration database
If you use DBI or another system to share Lemonldap::NG configuration, you have
to initialize the database. An example is given in example/lmConfig.mysql for
MySQL.
2.3.1.2 - Apache::Session database
The choice of Apache::Session::* module is free. See Apache::Session::Store::*
or Apache::Session::* to know how to configure the module. For example, if you
want to use Apache::Session::MySQL, you can create the database like this:
CREATE DATABASE sessions (
id char(32),
a_session text
);
2.3.2 - Manager configuration
Copy example/manager.cgi and personalize it if you want (see
Lemonldap::NG::Manager). You have to set in particular configStorage. For
example with MySQL:
$my $manager = Lemonldap::NG::Manager->new ( {
dbiChain => "DBI:mysql:database=mybase;host=1.2.3.4",
dbiUser => "lemonldap-ng",
dbiPassword => "mypass",
} );
Securise Manager access with Apache: Lemonldap::NG does not securise the manager
itself yet:
SSLEngine On
Order Deny, Allow
Deny from all
Allow from admin-network/netmask
AuthType Basic
...
After configuration, you can also protect the manager with an Lemonldap::NG
handler.
2.3.3 - Configuration edition
Connect to the manager with your browser start configure your Web-SSO. You have
to set at least some parameters:
a) General parameters :
* Authentication parameters -> portal : URL to access to the authentication
portal
* Domain : the cookie domain. All protected VirtualHosts have to be under it
* LDAP parameters -> LDAP Server
* LDAP parameters -> LDAP Accout and password : required only if anonymous
binds are not accepted
* Session Storage -> Apache::Session module : how to store user sessions.
You can use all module that
inherit from Apache::Session
like Apache::Session::MySQL
* Session Storage -> Apache::Session Module parameters :
see Apache::Session::<Choosen module>
b) User groups :
Use the "New Group" button to add your first group. On the left, set the
keyword which will be used later and set on the right the corresponding rule:
you can use :
* an LDAP filter (it will be tested with the user uid)
or
* a Perl condition enclosed with {}. All variables declared in "General
parameters -> LDAP attributes" can be used with a "$". For example:
MyGroup / { $uid eq "foo" or $uid eq "bar" }
c) Virtual hosts
You have to create a virtual host for each Apache host (virtual or real)
protected by Lemonldap::NG even if just a sub-directory is protected. Else,
user who want to access to the protected area will be rejected with a "500
Internal Server Error" message and the apache logs will explain the problem.
Each virtual host has 2 groups of parameters:
* Headers: the headers added to the apache request. Default :
Auth-User => $uid
* Rules: subdivised in 2 categories:
* default : the default rule
* personalized rules: association of a Perl regular expression and
a condition. For example:
^/restricted.*$ / $groups =~ /\bMyGroup\b/
-------------
3 - DEBUGGING
-------------
Lemonldap::NG uses simply the Apache log system. So use LogLevel to choose
information to display.
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Lemonldap-NG
====================
Go to http://wiki.lemonldap.objectweb.org/xwiki/bin/view/NG/Presentation to get
the up-to-date documentation.
Lemonldap::NG is a modular Web-SSO based on Apache::Session modules. It
simplifies the build of a protected area with a few changes in the application.
It manages both authentication and authorization and provides headers for
accounting. So you can have a full AAA protection for your web space as
described below.
1 - Installation
2 - Authentication, Authorization and Accounting mechanisms
2.1 - Authentication
2.2 - Authorization
2.3 - Accounting
3 - Session storage system
4 - Author
5 - Copyright and licence
1 - INSTALLATION
================
Lemonldap::NG is a different project than Lemonldap and contains all you need
to use and administer it. So softwares, like Lemonldap webmin module, may not
work with Lemonldap::NG.
The Apache module part (Lemonldap::NG::Handler) works both with Apache 1.3.x
and 2.x ie mod_perl 1 and 2 (but not with mod_perl 1.99). Portal and Manager
act as CGI, so they can work everywhere.
See INSTALL file in the source tree for a complete installation documentation.
2 - AUTHENTICATION, AUTHORIZATION AND ACCOUNTING MECHANISMS
===========================================================
Warning: Lemonldap::NG configuration has to be edited using the manager unless
you know exactly what you are doing. The parameters discussed here are all in
the configuration tree.
2.1 - Authentication
If a user isn't authenticated and attemps to connect to an area protected by a
Lemonldap::NG compatible handler, he is redirected to a portal. The portal
authenticates user with a ldap bind by default, but you can also use another
authentication sheme like using x509 user certificates (see
Lemonldap::NG::Portal::AuthSSL(3) for more).
Lemonldap use session cookies generated by Apache::Session so as secure as a
128-bit random cookie. You may use the securedCookie options to avoid session
hijacking.
You have to manage life of sessions by yourself since Lemonldap::NG knows
nothing about the L<Apache::Session> module you've choosed, but it's very easy
using a simple cron script because Lemonldap::NG::Portal stores the start
time in the _utime field.
By default, a session stay 10 minutes in the local storage, so in the worth
case, a user is authorized 10 minutes after he lost his rights.
2.2 - Authorization
Authorization is controled only by handlers because the portal knows nothing
about the way the user will choose. When configuring your Web-SSO, you have to:
* choose the ldap attributes you want to use to manage accounting and
authorization.
* create Perl expressions to define user groups (using ldap attributes)
* create an array foreach virtual host associating URI regular expressions and
Perl expressions to use to grant access.
Example (See Lemonldap::NG::Manager::Conf(3) to see how configuration is stored
* Exported variables :
# Custom-Name => LDAP attribute
cn => cn
departmentUID => departmentUID
login => uid
* User groups :
# Custom-Name => group definition
group1 => { $departmentUID eq "unit1" or $login = "foo.bar" }
* Area protection:
# Each VirtualHost has its own configuration
# associating URL regexp to Perl expression
* www1.domain.com :
^/protected/.*$ => $groups =~ /\bgroup1\b/
default => accept
},
* www2.domain.com => {
^/site/.*$ => $uid eq "admin" or $groups =~ /\bgroup2\b/
^/(js|css) => accept
default => deny
},
},
2.2.1 - Performance
You can use Perl expressions as complicated as you want and you can use all
the exported LDAP attributes (and create your own attributes: with 'macros'
mechanism) in groups evaluations, area protections or custom HTTP headers
(you just have to call them with a "$").
You have to be careful when choosing your expressions:
* groups and macros are evaluated each time a user is redirected to the portal
* virtual host rules and exported headers are evaluated for each request on a
protected area.
It is also recommanded to use the groups mechanism to avoid having to evaluate
a long expression at each HTTP request: