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mod_auth_openidc RP Integration#

Basic Web Server Installation#

Before you can install mod_auth_openidc, you need to have an Apache httpd server running with SSL enabled.

Apache Web Server#

It is assumed that all the hostnames will be DNS resolvable. If not, then add the entries in /etc/hosts file on both the web server and Gluu Server.

If you don't have the Apache HTTPD server installed, use apt-get to install the Ubuntu standard distribution:

# apt-get install apache2
# service apache2 start

SSL Configuration#

The SSL Module is necessary for the Apache OpenID Connect Module. Please use the following commands to activate the ssl module.

# a2enmod ssl

The next step is to create a self-signed SSL Certificate.

  • Create a directory to put the generate the ssl certificate
# mkdir /etc/apache2/ssl
# openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/apache2/ssl/apache.key -out /etc/apache2/ssl/apache.crt
  • Answer the questions that are asked. A template is given below
    Country Name (2 letter code) [AU]:US
    State or Province Name (full name) [Some-State]:TX
    Organization Name (eg, company) [Internet Widgits Pty Ltd]:Acme Inc.
    Organizational Unit Name (eg, section) []:
    Common Name (e.g. server FQDN or YOUR name) []:www.mydomain.com
    Email Address []:help@mydomain.com

Configure Apache to use SSL#

This section will guide you through the steps to configure Apache to use the SSL module

  1. Open the default-ssl.conf file
# vim /etc/apache2/sites-available/default-ssl.conf
  1. Update the certificate locations with the newly created certificates /etc/apache2/ssl/apache.key and /etc/apache2/ssl/apache.crt

  2. Activate the SSL Virtual Host and CGI

# a2ensite default-ssl.conf
# a2enmod cgid
# service apache2 restart

At this point, its a good time to test to make sure SSL and CGI are working. Point your browser at https://www.mydomain.com/cgi-bin/printHeaders.cgi You should see a list of current environment variables.

Configuration of mod_auth_openidc#

Ubuntu Installation#

mod_auth_openidc module depends on the Ubuntu packages libjansson, libhiredis, and libcurl:

For Ubuntu 14.04

# apt-get install libjansson4 libhiredis0.10
# apt-get install libcurl3

For Ubuntu 16.04

# apt-get install libjansson4 libhiredis0.13
# apt-get install libcurl3

You'll also need the mod_auth_openidc and libjose packages which can be downloaded from the Releases Page.

For example, at this time the current release for mod_auth_openidc is 2.3.8 and for libjose is 2.3.0, so the command would be:

For Ubuntu 14.04

# wget https://github.com/zmartzone/mod_auth_openidc/releases/download/v2.3.0/libcjose0_0.5.1-1.trusty.1_amd64.deb
# wget https://github.com/zmartzone/mod_auth_openidc/releases/download/v2.3.8/libapache2-mod-auth-openidc_2.3.8-1.trusty+1_amd64.deb
# dpkg -i libcjose0_0.5.1-1.trusty.1_amd64.deb
# dpkg -i libapache2-mod-auth-openidc_2.3.8-1.trusty+1_amd64.deb

For Ubuntu 16.04

# wget https://github.com/zmartzone/mod_auth_openidc/releases/download/v2.3.0/libcjose0_0.5.1-1.xenial.1_amd64.deb
# wget https://github.com/zmartzone/mod_auth_openidc/releases/download/v2.3.8/libapache2-mod-auth-openidc_2.3.8-1.xenial+1_amd64.deb
# dpkg -i libcjose0_0.5.1-1.xenial.1_amd64.deb
# dpkg -i libapache2-mod-auth-openidc_2.3.8-1.xenial+1_amd64.deb

Note

Get the latest packages here: https://github.com/zmartzone/mod_auth_openidc/releases

Note, if you like to build from source, you can clone the project at Github Page

Now you can enable the module

# sudo a2enmod auth_openidc
# sudo service apache2 restart

Client Registration#

There are two methods for client registration:

  1. Dynamic Client Registration
  2. Manual Client Registration

For this example, let's create the client manually in the Gluu Server. When you add the client, use the following parameters:

Name: mod_auth_openidc
Client Secret: something-sufficiently-unguessable
Application Type: Web
Pre-Authorization: True
Redirect Login URIs: https://www.mydomain.com/callback
Subject Type: Public
Scopes: openid, profile, email
Response Types: code
Grant Types: authorization_code

Make a note of the client_secret (you won't get to see it again)! You'll also need the client_id for the next step.

Install CGI script#

This CGI script makes for a good test page!

# vi /usr/lib/cgi-bin/printHeaders.cgi

Then paste in this code

#!/usr/bin/python

import os

d = os.environ
k = d.keys()
k.sort()

print "Content-type: text/html\n\n"

print "<HTML><Head><TITLE>Print Env Variables</TITLE></Head><BODY>"
print "<h1>Environment Variables</H1>"
for item in k:
    print "<p><B>%s</B>: %s </p>" % (item, d[item])
print "</BODY></HTML>"

Then you'll need to make the script executable by the Apache2

# chown www-data:www-data /usr/lib/cgi-bin/printHeaders.cgi
# chmod ug+x /usr/lib/cgi-bin/printHeaders.cgi

Configuring the Apache VirtualHost#

You are almost done! You'll need to configure mod_auth_openidc to protect your server.

# vi /etc/apache2/sites-available/default-ssl.conf

Add the following right under <VirtualHost _default_:443>

OIDCProviderMetadataURL https://idp.mydomain.com/.well-known/openid-configuration
OIDCClientID (client-id-you-got-back-when-you-added-the-client)
OIDCClientSecret (your-client-secret)
OIDCRedirectURI https://www.mydomain.com/callback
OIDCResponseType code
OIDCScope "openid profile email"
OIDCSSLValidateServer Off
OIDCCryptoPassphrase (a-random-seed-value)
OIDCPassClaimsAs environment
OIDCClaimPrefix USERINFO_
OIDCPassIDTokenAs payload
<Location "/">
    Require valid-user
    AuthType openid-connect
</Location>

Then restart Apache to effect the changes

# service apache2 restart

The most confusing part here is the OIDCRedirectURI--don't set this to a path used by your server. The apache-filter uses the redirect_uri to process the response from the OpenID Provider (Gluu Server).

Now you're ready to test. Open your web browser, and point it at https://www.mydomain.com/cgi-bin/printHeaders.cgi

If you're not logged in already, you should be redirected to the authentication page. If you are logged in, you should just see an html page with the REMOTE_USER variable populated. Also check out the OIDC_id_token_payload and all the claims for USERINFO_

CentOS Installation#

We assume that all the hostnames will be DNS resolvable. If not, then add the according entries in /etc/hosts, please.

Add EPEL Repository#

Run the following command to Add EPEL Repo.

  • # rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

Apache Web Server#

To setup Apache2 SSL, run the following commands:

Note

If the hiredis package is not found by the yum command, please download it manually from this page and install it.

# yum install httpd mod_ssl
# yum install curl hiredis jansson

Configure SSL Module#

This section will guide you to create SSL certificates. Use the following commands to crete a directory and generate the certificates.

# mkdir /etc/httpd/ssl
# openssl req -new -x509 -sha256 -days 365 -nodes -out /etc/httpd/ssl/httpd.pem -keyout /etc/httpd/ssl/httpd.key

You will be prompted to enter some values such as company name, country etc. Please enter them and your certificate will be ready. A template is given below

    Country Name (2 letter code) [XX]:US
    State or Province Name (full name) []:TX
    Locality Name (eg, city) [Default City]:Austin
    Organization Name (eg, company) [Default Company Ltd]:Gluu
    Organizational Unit Name (eg, section) []:
    Common Name (eg, your name or your server's hostname) []:modauth-centos.info
    Email Address []:support@gluu.org

The next step is to configure Apache to use the certificates and use the following command to edit the ssl.conf file.

# vi /etc/httpd/conf.d/ssl.conf

The important part of the configuration is to enter the path to the created SSL certificates. The example is given below.
Note: Please make sure to use the correct server name in the configuration file.

    SSLCertificateFile /etc/httpd/ssl/httpd.pem
    SSLCertificateKeyFile /etc/httpd/ssl/httpd.key
    ServerAdmin support@gluu.org
    ServerName gluu.org

Restart Apache Server and you are done configuring the SSL Module. Use the command below to restart the Apache Server.

# service httpd restart

Note

The latest version of the apache OpenID Connect module is available from this page

The latest package for the apache module might have multiple dependencies which must be installed first.

Run the following command to install the mod_auth_openidc module:

rpm -ivhhttps://github.com/zmartzone/mod_auth_openidc/releases/download/v2.3.8/mod_auth_openidc-2.3.8-1.el6.x86_64.rpm

Note

If there are any difficulties installing hiredis and jansson,

try to update the package database of your system using the command below.

# yum upgrade

Load Authentication Module#

Please make sure that the following shared-object file exists by running the following command:

ls -l /usr/lib64/httpd/modules/mod_auth_openidc.so

Install CGI Script#

The test page is made using the CGI script. Please use the following command to create the script.

# vi /var/www/cgi-bin/printHeaders.cgi

Please paste the following code to prepare the script

#!/usr/bin/python

import os

d = os.environ
k = d.keys()
k.sort()

print "Content-type: text/html\n\n"

print "<HTML><Head><TITLE>Print Env Variables</TITLE></Head><BODY>"
print "<h1>Environment Variables</H1>"
for item in k:
    print "<p><B>%s</B>: %s </p>" % (item, d[item])
    print "</BODY></HTML>"

The next step is to make the script executable by httpd

# chown apache:apache /var/www/cgi-bin/printHeaders.cgi
# chmod ug+x /var/www/cgi-bin/printHeaders.cgi

Client Registration#

There are two methods for client registration:

  1. Dynamic Client Registration
  2. Manual Client Registration

You can use any of the methods to register the client. For this example, let's create the client manually in the Gluu Server. Please use the following parameters to create the client:

Name: mod_auth_openidc
Client Secret: something-sufficiently-unguessable
Application Type: Web
Pre-Authorization: Enabled
login uri: https://www.mydomain.com/callback
Subject Type: Public
Scopes: openid, profile, email
Response Types: code

Note

The client_secret should be noted after creating the client in Gluu Server as it is used later.

Configure the Apache Virtualhost#

The Apache module is confgured in the default SSL configuration file. Please use the command below to open the file

# vi /etc/httpd/conf.d/ssl.conf 

Please add the following at the bottom of the file

OIDCProviderMetadataURL https://idp.mydomain.com/.well-known/openid-configuration
OIDCClientID (client-id-you-got-back-when-you-added-the-client)
OIDCClientSecret (your-client-secret)
OIDCRedirectURI https://www.mydomain.com/callback
OIDCResponseType code
OIDCScope "openid profile email"
OIDCSSLValidateServer Off
OIDCCryptoPassphrase (a-random-seed-value)
OIDCPassClaimsAs environment
OIDCClaimPrefix USERINFO_
OIDCPassIDTokenAs payload
<Location "/">
    Require valid-user
    AuthType openid-connect
</Location>

Warning

Please remember to populate the OIDCRedirectURI with a value that is not used by the server. The apache-filter uses the redirect_uri to process the response from the OpenID Provider (Gluu Server).

Please restart the httpd server for the changes to take effect

# service httpd restart

Now you're ready to test. Open your web browser, and point it at https://www.mydomain.com/cgi-bin/printHeaders.cgi