yannstatic/static/2019/12/25/Nginx_SSL_headers_diffie-hellmann.html

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<article itemscope itemtype="http://schema.org/Article"><div class="article__header"><header><h1 style="color:Tomato;">Nginx_SSL_headers_diffie-hellmann</h1></header></div><meta itemprop="headline" content="Nginx_SSL_headers_diffie-hellmann"><div class="article__info clearfix"><ul class="left-col menu"><li>
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<a class="button button--secondary button--pill button--sm" style="color:#00FFFF" href="/archive.html?tag=nginx">nginx</a>
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<i class="far fa-calendar-alt"></i>&nbsp;<span title="Création" style="color:#FF00FF">25&nbsp;déc.&nbsp;&nbsp;2019</span>
<span title="Modification" style="color:#00FF7F">23&nbsp;nov.&nbsp;&nbsp;2018</span></li></ul></div><meta itemprop="datePublished" content="2018-11-23T00:00:00+01:00">
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<summary><b>Afficher/cacher Sommaire</b></summary>
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</details><h3 id="nginx--ssl--header--diffie-hellmann">Nginx + SSL + header + diffie-hellmann</h3>
<p>Structure serveur nginx</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>/etc/nginx/
├── conf.d/
│   ├── xinyiczen.xyz.conf
│   └── xinyiczen.xyz.d/
├── dh_param
├── fastcgi.conf
├── fastcgi.conf.default
├── fastcgi_params
├── fastcgi_params.default
├── header_params
├── koi-utf
├── koi-win
├── mime.types
├── mime.types.default
├── nginx.conf
├── nginx.conf.default
├── scgi_params
├── scgi_params.default
├── ssl_params
├── uwsgi_params
├── uwsgi_params.default
└── win-utf
</code></pre></div></div>
<p><strong>ssl</strong><br />
Il faut préalablement demander des certificats (ca+key) SSL pour le domaine auprès dune autorité de certification (lets encrypt ou autre)<br />
Le fichier de configuration<br />
<code class="language-plaintext highlighter-rouge">sudo nano /etc/nginx/ssl_params</code></p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code> ssl_certificate /etc/ssl/private/xinyiczen.xyz-fullchain.pem;
ssl_certificate_key /etc/ssl/private/xinyiczen.xyz-key.pem;
ssl_session_timeout 5m;
ssl_session_cache shared:SSL:50m;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers ALL:!aNULL:!eNULL:!LOW:!EXP:!RC4:!3DES:+HIGH:+MEDIUM;
</code></pre></div></div>
<p><strong>Entêtes</strong><br />
Le fichier de configuration<br />
<code class="language-plaintext highlighter-rouge">sudo nano /etc/nginx/header_params</code></p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code> #HSTS est un dispositif de sécurité par lequel un site web peut déclarer aux navigateurs quils doivent communiquer avec lui en utilisant exclusivement le protocole HTTPS, au lieu du HTTP
add_header Strict-Transport-Security "max-age=31536000;";
#se protéger contre le détournement de clic (clickjacking)
add_header X-Frame-Options "SAMEORIGIN" always;
#faire une vérification stricte des types Mime. Elle naccepte quune seule directive : nosniff.
add_header X-Content-Type-Options nosniff;
#activer les filtres anti-xss incorporés dans certains navigateurs.
add_header X-XSS-Protection "1; mode=block";
#CSP permet dautoriser seulement les domaines déclarés à exécuter du script JavaScript, une feuille de style css, etc.
# Content-Security-Policy : https://openweb.eu.org/articles/content-security-policy
add_header Content-Security-Policy "default-src 'self'";
# Désactiver les références pour les navigateurs qui ne prennent pas en charge strict-origin-when-cross-origin
# Referrer-Policy : https://scotthelme.co.uk/a-new-security-header-referrer-policy/
# Utilise strict-origin-when-cross-origin pour les navigateurs qui le font
add_header Referrer-Policy "no-referrer, strict-origin-when-cross-origin";
</code></pre></div></div>
<p><strong>Diffie-Hellmann</strong><br />
Générer une clé Diffie-Hellmann<br />
<em>En cryptographie, léchange de clés Diffie-Hellman, du nom de ses auteurs Whitfield Diffie et Martin Hellman, est une méthode par laquelle deux agents nommés conventionnellement <strong>A</strong> et<strong>B</strong> peuvent se mettre daccord sur un nombre (quils peuvent utiliser comme clé pour chiffrer la conversation suivante) sans quun troisième agent appelé <strong>D</strong> puisse découvrir le nombre, même en ayant écouté tous leurs échanges.</em></p>
<blockquote>
<p>ATTENTION : Génération clé Diffie-Hellmann très très longue en temps , 30 minutes minimum…</p>
</blockquote>
<p>Générer une clé
<code class="language-plaintext highlighter-rouge">openssl dhparam -out /etc/ssl/private/dh4096.pem -outform PEM -2 4096</code><br />
Déplacer la clé dans le répertoire<br />
<code class="language-plaintext highlighter-rouge">sudo mv dh4096.pem /etc/ssl/private/</code><br />
Droits pour root<br />
<code class="language-plaintext highlighter-rouge">sudo chmod 600 /etc/ssl/private/dh4096.pem</code><br />
Le fichier de configuration<br />
<code class="language-plaintext highlighter-rouge">sudo nano /etc/nginx/dh_param</code></p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code> # Uncomment the following directive after DH generation
# &gt; openssl dhparam -out /etc/ssl/private/dh4096.pem -outform PEM -2 4096
ssl_dhparam /etc/ssl/private/dh4096.pem;
</code></pre></div></div>
<p>Configuration de base avec SSL et sécurité + letsencrypt (renouvellement)<br />
<code class="language-plaintext highlighter-rouge">sudo nano /etc/nginx/conf.d/xinyiczen.xyz.conf</code></p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>server {
listen 80;
listen [::]:80;
## redirect http to https ##
return 301 https://$server_name$request_uri;
}
server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name xinyiczen.xyz;
#### Locations
# On cache les fichiers statiques
location ~* \.(html|css|js|png|jpg|jpeg|gif|ico|svg|eot|woff|ttf)$ { expires max; }
# On interdit les dotfiles
location ~ /\. { deny all; }
include ssl_params;
include header_params;
include dh_param;
root /var/www/ ;
index index.php index.html index.htm;
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/run/php/php7.0-fpm.sock; # PHP7.0
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $request_filename;
}
include conf.d/xinyiczen.xyz.d/*.conf;
access_log /var/log/nginx/xinyiczen.xyz-access.log;
error_log /var/log/nginx/xinyiczen.xyz-error.log;
}
</code></pre></div></div>
<p>Vérifier<br />
<code class="language-plaintext highlighter-rouge">sudo nginx -t</code><br />
Relancer<br />
<code class="language-plaintext highlighter-rouge">sudo systemctl restart nginx</code><br />
Test redirection http/https avec curl depuis un poste distant</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>$ curl -I xinyiczen.xyz
HTTP/1.1 301 Moved Permanently
Server: nginx/1.13.5
Date: Wed, 04 Oct 2017 06:46:26 GMT
Content-Type: text/html
Content-Length: 185
Connection: keep-alive
Location: https://xinyiczen.xyz/
</code></pre></div></div>
<p>Tester le lien <a href="https://xinyiczen.xyz">https://xinyiczen.xyz</a></p>
<p>Vérification headers <a href="https://securityheaders.io">https://securityheaders.io</a><br />
Vérification complète <a href="https://observatory.mozilla.org/analyze.html?host=xinyiczen.xyz">https://observatory.mozilla.org/analyze.html?host=xinyiczen.xyz</a></p>
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required: requiredOptions
})
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throwError('You must specify the following required options: ' + requiredOptions)
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middleware: options.templateMiddleware
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sort: options.sortMiddleware,
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_$Repository_4.put(json)
registerInput()
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throwError('failed to get JSON (' + url + ')')
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initWithJSON(json)
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emptyResultsContainer()
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function throwError (message) {
throw new Error('SimpleJekyllSearch --- ' + message)
}
})(window)
}());
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SimpleJekyllSearch({
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resultsContainer: document.getElementById('results-container'),
noResultsText: '<p>Aucun résultat!</p>',
json: '/search.json',
searchResultTemplate: '<li><a href="{url}">{date}&nbsp;{title}</a>&nbsp;(Création {create})</li>'
})
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clearTimeout(timeout);
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$scrollTarget.on('scroll', function() {
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$window.on('resize', window.throttle(function() {
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$window.on('resize', window.throttle(function() {
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return {
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$.fn.toc = toc;
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toc && toc.setOptions({
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affix && affix.setOptions({
disabled: tocDisabled
});
}, 100));
window.pageAsideAffix = affix;
});
})();
</script><!---->
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