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162 lines
8.5 KiB
162 lines
8.5 KiB
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<link rel="start" href="u2f.html"/>
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<link rel="contents" href="u2f.html" title="Sitemap"/>
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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="#prerequisites_and_dependencies">Prerequisites and dependencies</a></div></li>
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<li class="level1"><div class="li"><a href="#configuration">Configuration</a></div></li>
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<li class="level1"><div class="li"><a href="#browser_compatibility">Browser compatibility</a></div></li>
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<li class="level1"><div class="li"><a href="#enrollment">Enrollment</a></div></li>
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<li class="level1"><div class="li"><a href="#assistance">Assistance</a></div></li>
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<li class="level1"><div class="li"><a href="#developer_corner">Developer corner</a></div></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="universal_2nd_factor_authentication_u2f">Universal 2nd Factor Authentication (U2F)</h1>
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<div class="level1">
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<p>
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<a href="https://en.wikipedia.org/wiki/Universal_2nd_Factor" class="urlextern" title="https://en.wikipedia.org/wiki/Universal_2nd_Factor" rel="nofollow">Universal 2nd Factor</a> (U2F) is an open authentication standard that strengthens and simplifies two-factor authentication using specialized USB or NFC devices.
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</p>
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<p>
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LLNG can propose to users to register their keys. When done, 2F registered users can not login without using their key.
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</p>
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<div class="notetip">Note that it's a second factor, not an authentication module. Users are authenticated by both login form and U2F form.
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</div>
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</div>
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<!-- EDIT1 SECTION "Universal 2nd Factor Authentication (U2F)" [1-529] -->
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<h2 class="sectionedit2" id="prerequisites_and_dependencies">Prerequisites and dependencies</h2>
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<div class="level2">
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<p>
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This feature uses <a href="https://metacpan.org/pod/Crypt::U2F::Server::Simple" class="urlextern" title="https://metacpan.org/pod/Crypt::U2F::Server::Simple" rel="nofollow">Crypt::U2F::Server::Simple</a> that is only available on CPAN repository for now. Before compiling it, you must install Yubico's C library headers (called libu2f-server-dev on Debian).
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</p>
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<div class="noteimportant">An HTTPS portal is required to use U2F
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</div>
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</div>
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<!-- EDIT2 SECTION "Prerequisites and dependencies" [530-891] -->
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<h2 class="sectionedit3" id="configuration">Configuration</h2>
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<div class="level2">
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<p>
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In the manager (second factors), you just have to enable it:
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</p>
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<ul>
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<li class="level1"><div class="li"> U2F ⇒ Activation: set it to “on”</div>
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</li>
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<li class="level1"><div class="li"> U2F ⇒ Self registration: set it to “on” if users are authorized to register their keys</div>
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</li>
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<li class="level1"><div class="li"> U2F ⇒ Authentication level: you can overwrite here auth level for U2F registered users. Leave it blank keeps auth level provided by first authentication module <em>(default: 2 for user/password based modules)</em>. <strong>It is recommended to set an higher value here if you want to give access to some apps only for enrolled users</strong></div>
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</li>
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</ul>
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<div class="noteimportant">If you want to use a custom rule for “activation” and want to keep self-registration, you must include this in your rule: <code>$_2fDevices =~ /“type”:\s*“U2F”/s</code>, else U2F will be required even if users are not registered. This is automatically done when “activation” is set to “on”.
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</div>
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</div>
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<!-- EDIT3 SECTION "Configuration" [892-1745] -->
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<h2 class="sectionedit4" id="browser_compatibility">Browser compatibility</h2>
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<div class="level2">
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<ul>
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<li class="level1"><div class="li"> Chrome/Chromium ≥ 38</div>
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</li>
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<li class="level1"><div class="li"> Firefox :</div>
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<ul>
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<li class="level2"><div class="li"> 38 to 56 with <a href="https://addons.mozilla.org/fr/firefox/addon/u2f-support-add-on/" class="urlextern" title="https://addons.mozilla.org/fr/firefox/addon/u2f-support-add-on/" rel="nofollow">U2F Support Add-on</a></div>
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</li>
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<li class="level2"><div class="li"> 57 to 59, with “security.webauth.u2f” set to “true” in “about:config” <em>(see <a href="https://www.yubico.com/2017/11/how-to-navigate-fido-u2f-in-firefox-quantum/" class="urlextern" title="https://www.yubico.com/2017/11/how-to-navigate-fido-u2f-in-firefox-quantum/" rel="nofollow">Yubico explanations</a>)</em></div>
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</li>
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<li class="level2"><div class="li"> probably enabled by default for versions ≥ 60</div>
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</li>
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</ul>
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</li>
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<li class="level1"><div class="li"> Opera ≥ 40</div>
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</li>
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</ul>
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</div>
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<!-- EDIT4 SECTION "Browser compatibility" [1746-2186] -->
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<h2 class="sectionedit5" id="enrollment">Enrollment</h2>
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<div class="level2">
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<p>
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If you have enabled self registration, users can register their U2F keys using <a href="https://portal/2fregisters" class="urlextern" title="https://portal/2fregisters" rel="nofollow">https://portal/2fregisters</a>
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</p>
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</div>
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<!-- EDIT5 SECTION "Enrollment" [2187-2317] -->
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<h2 class="sectionedit6" id="assistance">Assistance</h2>
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<div class="level2">
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<p>
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If a user loses its key, you can delete it from the manager Second Factor module. To enable manager Second Factor Administration Module, set <code>enabledModules</code> key in your <code>lemonldap-ng.ini</code> file :
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</p>
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<pre class="code ini"><span class="re0"><span class="br0">[</span>portal<span class="br0">]</span></span>
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<span class="re1">enabledModules</span> <span class="sy0">=</span><span class="re2"> conf, sessions, notifications, 2ndFA</span></pre>
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</div>
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<!-- EDIT6 SECTION "Assistance" [2318-2625] -->
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<h2 class="sectionedit7" id="developer_corner">Developer corner</h2>
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<div class="level2">
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<p>
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If you have another U2F registration interface, you have to set these keys in Second Factor Devices array (JSON) in your user-database. Then map it to the _2fDevices attribute <em>(see <a href="exportedvars.html" class="wikilink1" title="documentation:2.0:exportedvars">exported variables</a>)</em>:
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</p>
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<pre class="code file json">$_2fDevices = [{"name" : "MyU2FKey" , "type" : "U2F" , "_userKey" : "########" , "_keyHandle":"########" , "epoch":"1524078936"}, ...]</pre>
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<div class="noteimportant"><code>_userKey</code> must be base64 encoded
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</div>
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<p>
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Note that both “origin” and “appId” are fixed to portal <abbr title="Uniform Resource Locator">URL</abbr>.
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</p>
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</div>
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<!-- EDIT7 SECTION "Developer corner" [2626-] --></div>
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</body>
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</html>
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