330 lines
18 KiB
HTML
330 lines
18 KiB
HTML
<!DOCTYPE html>
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<html lang="en" dir="ltr">
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<head>
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<meta charset="utf-8" />
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<title>documentation:2.0:ssoaas</title>
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<meta name="generator" content="DokuWiki"/>
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<meta name="robots" content="index,follow"/>
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<meta name="keywords" content="documentation,2.0,ssoaas"/>
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<link rel="search" type="application/opensearchdescription+xml" href="lib/exe/opensearch.html" title="LemonLDAP::NG"/>
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<link rel="start" href="ssoaas.html"/>
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<link rel="contents" href="ssoaas.html" title="Sitemap"/>
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<link rel="stylesheet" type="text/css" href="lib/exe/css.php.t.bootstrap3.css"/>
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<link rel="stylesheet" type="text/css" href="/javascript/bootstrap/css/bootstrap.min.css" />
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//elsif:useexternallibs
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<script type="text/javascript">/*<![CDATA[*/var NS='documentation:2.0';var JSINFO = {"id":"documentation:2.0:ssoaas","namespace":"documentation:2.0"};
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/*!]]>*/</script>
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//elsif:useexternallibs
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<script type="text/javascript" src="http://code.jquery.com/jquery-2.2.0.min.js"></script>
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//else -->
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<script type="text/javascript" src="/static/bwr/jquery/dist/jquery.js"></script>
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<!-- //if:usedebianlibs
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<script type="text/javascript" src="/javascript/jquery-ui/jquery-ui.min.js"></script>
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//elsif:useexternallibs
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<script type="text/javascript" src="http://code.jquery.com/ui/1.10.4/jquery-ui.min.js"></script>
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//elsif:jsminified
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//else -->
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<script type="text/javascript" src="/static/bwr/jquery-ui/jquery-ui.js"></script>
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<!-- //endif -->
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</head>
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<body>
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<div class="dokuwiki export container">
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<!-- TOC START -->
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<div id="dw__toc">
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<h3 class="toggle">Table of Contents</h3>
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<div>
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<ul class="toc">
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<li class="level1"><div class="li"><a href="#our_concept_of_ssoaas">Our concept of SSOaaS</a></div></li>
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<li class="level1"><div class="li"><a href="#examples_of_webserver_configuration_for_dockervm_images">Examples of webserver configuration for Docker/VM images</a></div>
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<ul class="toc">
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<li class="level2"><div class="li"><a href="#using_a_global_fastcgi_or_uwsgi_server">Using a global FastCGI (or uWSGI) server</a></div>
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<ul class="toc">
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<li class="level3"><div class="li"><a href="#nginx">Nginx</a></div></li>
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<li class="level3"><div class="li"><a href="#apache">Apache</a></div></li>
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<li class="level3"><div class="li"><a href="#nodejs">Node.js</a></div></li>
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<li class="level3"><div class="li"><a href="#plack_application">Plack application</a></div></li>
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</ul>
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</li>
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<li class="level2"><div class="li"><a href="#using_front_reverse-proxies">Using front reverse-proxies</a></div></li>
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</ul></li>
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</ul>
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</div>
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</div>
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<!-- TOC END -->
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<h1 class="sectionedit1" id="sso_as_a_service_ssoaas">SSO as a service (SSOaaS)</h1>
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<div class="level1">
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</div>
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<!-- EDIT1 SECTION "SSO as a service (SSOaaS)" [1-41] -->
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<h2 class="sectionedit2" id="our_concept_of_ssoaas">Our concept of SSOaaS</h2>
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<div class="level2">
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<p>
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Access management provides 3 services:
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</p>
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<ul>
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<li class="level1"><div class="li"> Global Authentication: Single Sign-On</div>
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</li>
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<li class="level1"><div class="li"> Authorization: to grant authentication is not enough. User rights must be checked</div>
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</li>
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<li class="level1"><div class="li"> Accounting: <abbr title="Single Sign On">SSO</abbr> logs (access) + application logs <em>(transactions and results)</em></div>
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</li>
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</ul>
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<p>
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<abbr title="LemonLDAP::NG">LL::NG</abbr> affords all these services (except application logs of course, but headers are provided to permit this).
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</p>
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<p>
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Headers setting is an another <abbr title="LemonLDAP::NG">LL::NG</abbr> service. <abbr title="LemonLDAP::NG">LL::NG</abbr> can provide any user attributes to an application <em>(see <a href="writingrulesand_headers.html" class="wikilink1" title="documentation:2.0:writingrulesand_headers">Rules and headers</a>)</em>
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</p>
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<p>
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<code>*aaS</code> means that application can drive underlying layer (IaaS for infrastructure, PaaS for platform,…). So for us, <code>SSOaaS</code> must provide the ability for an app to <em class="u">manage authorizations</em> and choose <em class="u">user attributes</em> to set. Authentication can not be really “*aaS”: app must just use it, not manage it.
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</p>
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<p>
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<abbr title="LemonLDAP::NG">LL::NG</abbr> affords some features that can be used to provide <abbr title="Single Sign On">SSO</abbr> as a service: a web application can manage its rules and headers. Docker or VM images (Nginx only) includes <abbr title="LemonLDAP::NG">LL::NG</abbr> Nginx configuration that aims to a global <a href="platformsoverview.html#external_servers_for_nginx" class="wikilink1" title="documentation:2.0:platformsoverview">LL::NG authorization server</a>. By default, all authenticated users can access and one header is set: <code>Auth-User</code>. If application gives a RULES_<abbr title="Uniform Resource Locator">URL</abbr> parameter that refers to a JSON file, authorization server will read it, apply specified rules and set required headers <em>(see <a href="devopshandler.html" class="wikilink1" title="documentation:2.0:devopshandler">DevOps Handler</a>)</em>.
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</p>
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<p>
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There are two different architectures to do this:
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</p>
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<ul>
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<li class="level1"><div class="li"> Using a <a href="psgi.html" class="wikilink1" title="documentation:2.0:psgi">global FastCGI (or uWSGI) server</a></div>
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</li>
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<li class="level1"><div class="li"> Using front reverse-proxies <em>(some cloud installations use reverse-proxies in front-end)</em></div>
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</li>
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</ul>
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<p>
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In both case, Handler type must be set to <a href="devopshandler.html" class="wikilink1" title="documentation:2.0:devopshandler">DevOps</a>.
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</p>
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</div>
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<!-- EDIT2 SECTION "Our concept of SSOaaS" [42-1764] -->
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<h2 class="sectionedit3" id="examples_of_webserver_configuration_for_dockervm_images">Examples of webserver configuration for Docker/VM images</h2>
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<div class="level2">
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</div>
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<!-- EDIT3 SECTION "Examples of webserver configuration for Docker/VM images" [1765-1834] -->
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<h3 class="sectionedit4" id="using_a_global_fastcgi_or_uwsgi_server">Using a global FastCGI (or uWSGI) server</h3>
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<div class="level3">
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</div>
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<h4 id="nginx">Nginx</h4>
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<div class="level4">
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<p>
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In this example, web server templates (Nginx only) are configured to request authorization from a central FastCGI server:
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</p>
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<dl class="file">
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<dt><a href="_export/code/documentation/2.0/ssoaas/codeblock.0.code" title="Download Snippet" class="mediafile mf_conf">test-nginx.conf</a></dt>
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<dd><pre class="code file nginx">server {
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server_name myapp.domain.com;
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location = /lmauth {
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internal;
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include /etc/nginx/fastcgi_params;
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# Pass authorization requests to Central FastCGI server:
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fastcgi_pass 10.1.2.3:9090;
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fastcgi_param VHOSTTYPE DevOps;
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# Drop post datas
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fastcgi_pass_request_body off;
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fastcgi_param CONTENT_LENGTH "";
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# Keep original hostname
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fastcgi_param HOST $http_host;
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# Keep original request (LLNG server will received /lmauth)
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fastcgi_param X_ORIGINAL_URI $request_uri;
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# Set dynamically rules (LLNG will poll it every 10 mn)
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fastcgi_param RULES_URL http://rulesserver/my.json
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}
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location /rules.json {
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auth_request off;
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allow 10.1.2.3;
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deny all;
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}
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location ~ ^(.*\.php)$ {
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auth_request /lmauth;
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auth_request_set $lmremote_user $upstream_http_lm_remote_user;
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auth_request_set $lmlocation $upstream_http_location;
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error_page 401 $lmlocation;
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include /etc/lemonldap-ng/nginx-lua-headers.conf;
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...
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# Example with php-fpm:
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include snippets/fastcgi-php.conf;
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fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
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}
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location / {
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try_files $uri $uri/ =404;
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}
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}</pre>
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</dd></dl>
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</div>
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<h4 id="apache">Apache</h4>
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<div class="level4">
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<p>
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There is an experimental FactCGI client in LLNG. You just have to install FCGI::Client and add this in your apache2.conf:
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</p>
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<dl class="file">
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<dt><a href="_export/code/documentation/2.0/ssoaas/codeblock.1.code" title="Download Snippet" class="mediafile mf_conf">apache2.conf</a></dt>
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<dd><pre class="code file apache"><<span class="kw3">VirtualHost</span> ...>
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PerlHeaderParserHandler Lemonldap::NG::Handler::ApacheMP2::FCGIClient
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PerlSetVar LLNG_SERVER 127.0.0.1:<span class="nu0">9090</span>
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PerlSetVar VHOSTTYPE DevOps
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PerlSetVar RULES_URL http://app.tld/rules.json
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...
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</<span class="kw3">VirtualHost</span>></pre>
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</dd></dl>
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</div>
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<h4 id="nodejs">Node.js</h4>
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<div class="level4">
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<p>
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Using <a href="https://github.com/expressjs/express#readme" class="urlextern" title="https://github.com/expressjs/express#readme" rel="nofollow">express</a> and <a href="https://github.com/LemonLDAPNG/node-fastcgi-authz-client" class="urlextern" title="https://github.com/LemonLDAPNG/node-fastcgi-authz-client" rel="nofollow">fastcgi-authz-client</a>, you can protect also an Express server. Example:
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</p>
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<dl class="file">
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<dt><a href="_export/code/documentation/2.0/ssoaas/codeblock.2.code" title="Download Snippet" class="mediafile mf_js">app.js</a></dt>
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<dd><pre class="code file javascript"><span class="kw1">var</span> express <span class="sy0">=</span> require<span class="br0">(</span><span class="st0">'express'</span><span class="br0">)</span><span class="sy0">;</span>
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<span class="kw1">var</span> app <span class="sy0">=</span> express<span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
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<span class="kw1">var</span> FcgiAuthz <span class="sy0">=</span> require<span class="br0">(</span><span class="st0">'fastcgi-authz-client'</span><span class="br0">)</span><span class="sy0">;</span>
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<span class="kw1">var</span> handler <span class="sy0">=</span> FcgiAuthz<span class="br0">(</span><span class="br0">{</span>
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host<span class="sy0">:</span> <span class="st0">'127.0.0.1'</span><span class="sy0">,</span>
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port<span class="sy0">:</span> <span class="nu0">9090</span><span class="sy0">,</span>
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PARAMS<span class="sy0">:</span> <span class="br0">{</span>
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RULES_URL<span class="sy0">:</span> <span class="st0">'http://my-server/rules.json'</span>
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<span class="br0">}</span>
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<span class="br0">}</span><span class="br0">)</span><span class="sy0">;</span>
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app.<span class="me1">use</span><span class="br0">(</span>handler<span class="br0">)</span><span class="sy0">;</span>
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<span class="co1">// Simple express application</span>
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app.<span class="kw1">get</span><span class="br0">(</span><span class="st0">'/'</span><span class="sy0">,</span> <span class="kw1">function</span><span class="br0">(</span>req<span class="sy0">,</span> res<span class="br0">)</span> <span class="br0">{</span>
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<span class="kw1">return</span> res.<span class="me1">send</span><span class="br0">(</span><span class="st0">'Hello '</span> <span class="sy0">+</span> req.<span class="me1">upstreamHeaders</span><span class="br0">[</span><span class="st0">'auth-user'</span><span class="br0">]</span> <span class="sy0">+</span> <span class="st0">' !'</span><span class="br0">)</span><span class="sy0">;</span>
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<span class="br0">}</span><span class="br0">)</span><span class="sy0">;</span>
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<span class="co1">// Launch server</span>
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app.<span class="me1">listen</span><span class="br0">(</span><span class="nu0">3000</span><span class="sy0">,</span> <span class="kw1">function</span><span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span>
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<span class="kw1">return</span> console.<span class="me1">log</span><span class="br0">(</span><span class="st0">'Example app listening on port 3000!'</span><span class="br0">)</span><span class="sy0">;</span>
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<span class="br0">}</span><span class="br0">)</span><span class="sy0">;</span></pre>
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</dd></dl>
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</div>
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<h4 id="plack_application">Plack application</h4>
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<div class="level4">
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<p>
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You just have to enable <a href="https://metacpan.org/pod/Plack::Middleware::Auth::FCGI" class="urlextern" title="https://metacpan.org/pod/Plack::Middleware::Auth::FCGI" rel="nofollow">Plack::Middleware::Auth::FCGI</a>. Simple example:
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</p>
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<dl class="file">
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<dt><a href="_export/code/documentation/2.0/ssoaas/codeblock.3.code" title="Download Snippet" class="mediafile mf_psgi">app.psgi</a></dt>
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<dd><pre class="code file perl"><span class="kw2">use</span> Plack<span class="sy0">::</span><span class="me2">Builder</span><span class="sy0">;</span>
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<span class="kw1">my</span> <span class="re0">$app</span> <span class="sy0">=</span> <span class="kw2">sub</span> <span class="br0">{</span>
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<span class="kw1">my</span> <span class="re0">$env</span> <span class="sy0">=</span> <a href="http://perldoc.perl.org/functions/shift.html"><span class="kw3">shift</span></a><span class="sy0">;</span>
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<span class="kw1">my</span> <span class="re0">$user</span> <span class="sy0">=</span> <span class="re0">$env</span><span class="sy0">-></span><span class="br0">{</span>fcgiauth<span class="sy0">-</span>auth<span class="sy0">-</span>user<span class="br0">}</span><span class="sy0">;</span>
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<a href="http://perldoc.perl.org/functions/return.html"><span class="kw3">return</span></a> <span class="br0">[</span> <span class="nu0">200</span><span class="sy0">,</span> <span class="br0">[</span> <span class="st_h">'Content-Type'</span> <span class="sy0">=></span> <span class="st_h">'text/plain'</span> <span class="br0">]</span><span class="sy0">,</span> <span class="br0">[</span> <span class="st0">"Hello $user"</span> <span class="br0">]</span> <span class="br0">]</span><span class="sy0">;</span>
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<span class="br0">}</span><span class="sy0">;</span>
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<span class="co1"># Optionally ($fcgiResponse is the PSGI response of remote FCGI auth server)</span>
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<span class="co1">#sub on_reject {</span>
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<span class="co1"># my($self,$env,$fcgiResponse) = @_;</span>
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<span class="co1"># my $statusCode = $fcgiResponse->{status};</span>
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<span class="co1"># ...</span>
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<span class="co1">#}</span>
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builder
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<span class="br0">{</span>
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enable <span class="st0">"Auth::FCGI"</span><span class="sy0">,</span>
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host <span class="sy0">=></span> <span class="st_h">'127.0.0.1'</span><span class="sy0">,</span>
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port <span class="sy0">=></span> <span class="st_h">'9090'</span><span class="sy0">,</span>
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fcgi_auth_params <span class="sy0">=></span> <span class="br0">{</span>
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RULES_URL <span class="sy0">=></span> <span class="st_h">'https://my-server/my.json'</span><span class="sy0">,</span>
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<span class="br0">}</span><span class="sy0">,</span>
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<span class="co1"># Optional rejection subroutine</span>
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<span class="co1">#on_reject => \&on_reject;</span>
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<span class="sy0">;</span>
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<span class="re0">$app</span><span class="sy0">;</span>
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<span class="br0">}</span><span class="sy0">;</span></pre>
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</dd></dl>
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</div>
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<!-- EDIT4 SECTION "Using a global FastCGI (or uWSGI) server" [1835-5202] -->
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<h3 class="sectionedit5" id="using_front_reverse-proxies">Using front reverse-proxies</h3>
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<div class="level3">
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<p>
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This is a simple Nginx configuration file. It looks like a standard <abbr title="LemonLDAP::NG">LL::NG</abbr> nginx configuration file except for:
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</p>
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<ul>
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<li class="level1"><div class="li"> VHOSTTYPE parameter forced to use DevOps handler</div>
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</li>
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<li class="level1"><div class="li"> /rules.json must not be protected by <abbr title="LemonLDAP::NG">LL::NG</abbr> but by the web server itself</div>
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</li>
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</ul>
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<p>
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This configuration handles <code>*.dev.sso.my.domain</code> <abbr title="Uniform Resource Locator">URL</abbr> and forwards authenticated requests to <code><vhost>.internal.domain</code>. Rules can be defined in <code>/rules.json</code> which is located at the website root directory.
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</p>
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<dl class="file">
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<dt><a href="_export/code/documentation/2.0/ssoaas/codeblock.4.code" title="Download Snippet" class="mediafile mf_conf">test-nginx.conf</a></dt>
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<dd><pre class="code file nginx">server {
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server_name "~^(?<vhost>.+?)\.dev\.sso\.my\.domain$";
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location = /lmauth {
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internal;
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include /etc/nginx/fastcgi_params;
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fastcgi_pass unix:/var/run/llng-fastcgi-server/llng-fastcgi.sock;
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# Force handler type:
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fastcgi_param VHOSTTYPE DevOps;
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# Drop post datas
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fastcgi_pass_request_body off;
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fastcgi_param CONTENT_LENGTH "";
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# Keep original hostname
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fastcgi_param HOST $http_host;
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# Keep original request (LLNG server will received /lmauth)
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fastcgi_param X_ORIGINAL_URI $request_uri;
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}
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location /rules.json {
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auth_request off;
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allow 127.0.0.0/8;
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deny all;
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}
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location / {
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auth_request /lmauth;
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auth_request_set $lmremote_user $upstream_http_lm_remote_user;
|
|
auth_request_set $lmlocation $upstream_http_location;
|
|
error_page 401 $lmlocation;
|
|
include /etc/lemonldap-ng/nginx-lua-headers.conf;
|
|
proxy_pass https://$vhost.internal.domain;
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|
}
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|
}</pre>
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</dd></dl>
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|
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</div>
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<!-- EDIT5 SECTION "Using front reverse-proxies" [5203-] --></div>
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</body>
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</html>
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