rug-website/README.md

# RUG website template and single signon for django

Template and for creating a website in the University of Groningen *style*, which also helps you to get single sign-on
to work.

## Getting started

### Dependencies

Make sure these packages are installed on the webhost serving your website.

 * **centos** `yum install libxml2-devel libxslt-devel python34-devel xmlsec1-devel libmcrypt libmcrypt-devel xmlsec1-openssl`
 * **ubuntu** `sudo apt-get install libxml2-dev libxslt1-dev libxmlsec1-dev python3-dev`

## Virtualenv

I would suggest you use a virtualenv, this is a directory which contains the python executables and all python
packages, like django, python3-saml, etc.

    mkdir rugwebsite && cd rugwebsite
    virtualenv --python=/usr/bin/python3.5 venv
    source venv/bin/activate
    pip3 install -U gunicorn git+ssh://git@git.webhosting.rug.nl:222/p253591/rug-website.git

## Settings and X509 certificate

Create a file `rugwebsite/settings.py`, with settings like these:

	import os

	BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
	SECRET_KEY = '....'
	DEBUG = True
	LOGIN_REDIRECT_URL = '/'

	INSTALLED_APPS = (
	    'django.contrib.admin',
	    'django.contrib.auth',
	    'django.contrib.contenttypes',
	    'django.contrib.sessions',
	    'django.contrib.messages',
	    'django.contrib.staticfiles',
	    'bootstrap4',
	    'rugwebsite',
	)

	MIDDLEWARE_CLASSES = (
	    'django.contrib.sessions.middleware.SessionMiddleware',
	    'django.middleware.common.CommonMiddleware',
	    'django.middleware.csrf.CsrfViewMiddleware',
	    'django.contrib.auth.middleware.AuthenticationMiddleware',
	    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
	    'django.contrib.messages.middleware.MessageMiddleware',
	    'django.middleware.clickjacking.XFrameOptionsMiddleware',
	    'django.middleware.security.SecurityMiddleware',
	)

	ROOT_URLCONF = 'urls'

	TEMPLATES = [
	    {
		'BACKEND': 'django.template.backends.django.DjangoTemplates',
		'DIRS': [],
		'APP_DIRS': True,
		'OPTIONS': {
		    'context_processors': [
		        'django.template.context_processors.debug',
		        'django.template.context_processors.request',
		        'django.contrib.auth.context_processors.auth',
		        'django.contrib.messages.context_processors.messages',
		    ],
		},
	    },
	]

	DATABASES = {
	    'default': {
		'ENGINE': 'django.db.backends.sqlite3',
		'NAME': os.path.join(BASE_DIR, '..', 'db.sqlite3'),
	    }
	}

	LANGUAGE_CODE = 'en-us'
	TIME_ZONE = 'Europe/Amsterdam'
	USE_I18N = True
	USE_L10N = True
	USE_TZ = True

	STATIC_URL = '/static/'
	STATIC_ROOT = os.path.join(BASE_DIR, 'static')

    SAML_ROUTE = 'sso/saml/'
    SAML_REDIRECT = '/'
    SAML_USERS_MAP = []

    SAML_PROVIDERS = []


Make sure to fill in something random for `SECRET_KEY`, consult the dango documentation to make sure you're super
secure.

Then you can use django-admin to complete the settings with SAML2 metadata, inclusing a private key and x509
certificate. Run the following and **append** the output to `rugwebsite/settings.py`

    PYTHONPATH=. DJANGO_SETTINGS_MODULE=settings django-admin init-saml2-settings --country NL --city Groningen \
         --organisation 'University of Groningen' --organisation-unit 'Research and Innovation Support' \
         --common-name 'cosmo.service.rug.nl' --state Groningen \
         --support-name 'Research and Innovation Support' --support-email 'ris@list.rug.nl' \
         --technical-name 'Research and Innovation Support' --technical-email 'ris@list.rug.nl' \
         --base-url 'https://cosmo.service.rug.nl' --entity-id 'https://www.rug.nl/cosmo'

You can change these settings if you like. Make sure to choose these correctly for your situation:

 * entity-id
 * common-name
 * base-url, including http or https and a prefix to all paths, make sure base-url + "/sso/saml/metadata?provider=RuG"
   is a working url.
 * support-name, support-email, technical-name, technical-email

### Database and static files

    Create the database

    PYTHONPATH=. DJANGO_SETTINGS_MODULE=settings django-admin migrate

    And collect all static files (javascript, css, etc). Recall what the absolute path of rugwebsite/static is.

    PYTHONPATH=. DJANGO_SETTINGS_MODULE=settings django-admin collectstatic

### Host the website using Gunicorn

Create a `rugwebsite/wsgi.py`

    import os, sys

    sys.path.insert(0, 'absolute-path-to/rugwebsite/venv/lib/python3.5/site-packages/')
    sys.path.insert(0, 'absolute-path-to/rugwebsite/venv/lib64/python3.5/site-packages/')
    sys.path.insert(0, 'absolute-path-to/rugwebsite/')

    from django.core.wsgi import get_wsgi_application
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")

    application = get_wsgi_application()

You can test-run the website with gunicorn like, but it won't host the static files (javascript, css, etc). Decide on
what port it should run, for example `8890`.

    absolute-path-to/rugwebsite/venv/bin/gunicorn --bind 127.0.0.1:8890 wsgi

you can run this in a `sceen`, but it might be better to create a service like, in centos you create a
`/usr/lib/systemd/system/yourwebsite.service` like this

    [Unit]
    Description=your website gunicorn deamon description
    After=network.target

    [Service]
    PIDFile=/run/gunicorn/yourwebsitepid
    User=cosmo
    Group=cosmo
    RuntimeDirectory=gunicorn
    WorkingDirectory=absolute-path-to/rugwebsite/
    ExecStart=absolute-path-to/rugwebsite/venv/bin/gunicorn --pid /run/gunicorn/yourwebsitepid --bind 127.0.0.1:8890 wsgi
    ExecReload=/bin/kill -s HUP $MAINPID
    ExecStop=/bin/kill -s TERM $MAINPID
    PrivateTmp=true

    [Install]
    WantedBy=multi-user.target

You can start your service using `sudo service yourwebsite start` (or `restart`, `status`, `stop`, ...)

### nginx proxy

You can use nginx to proxy your website, and add https-support (instead of plain http), but also to server the static
files efficiently. Make sure nginx is installed and configure the website, for example by creating the
`/etc/nginx/conf.d/yourwebsite.conf` file on centos:

    # Make sure the port matches
    upstream yourwebsiteupstream {
        server 127.0.0.1:8890;
    }

    # Forward http to https
    server {
        listen 80;
        server_name cosmo.service.rug.nl;
        return 301 https://$host$request_uri;
    }

    server {
        client_max_body_size 64M;
        proxy_connect_timeout       300;
        proxy_send_timeout          300;
        proxy_read_timeout          300;
        send_timeout                300;
        listen              443 ssl;
        server_name         cosmo.service.rug.nl;
        ssl_certificate     /etc/nginx/conf.d/cosmo.service.rug.nl.pem;
        ssl_certificate_key /etc/nginx/conf.d/cosmo.service.rug.nl.key;
        ssl_protocols       TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
        ssl_prefer_server_ciphers on;
        ssl_dhparam /etc/nginx/conf.d/dhparams.pem;

        location = /favicon.ico { access_log off; log_not_found off; }
        location /static/ {
            alias absolute-path-to/rugwebsite/static/;
        }

        location / {
            proxy_pass http://yourwebsiteupstream/;
            proxy_set_header Host            cosmo.service.rug.nl;
            proxy_set_header X-Forwarded-For $remote_addr;

            # This setting is important, it allows SAML2 to verify the provider url, whithout getting into trouble because
            # the https-part is handled by nginx, and hence not seen by the django SAML2 code.
            proxy_set_header X_FORWARDED_PROTO https;
        }
    }

Restart nginx to load the settings `sudo service nginx restart` (or `reload`, to only reload the settings instaed of a
full restart)