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103</div>
104<h1 id="rest-api">REST API</h1>
105<h2 id="usage">Usage</h2>
106<p>See the <a href="http://shaarli.github.io/api-documentation/">REST API documentation</a>.<a href=".html"></a></p>
107<h2 id="authentication">Authentication</h2>
108<p>All requests to Shaarli's API must include a JWT token to verify their authenticity.</p>
109<p>This token has to be included as an HTTP header called <code>Authentication: Bearer &lt;jwt token&gt;</code>.</p>
110<p>JWT resources :</p>
111<ul>
112<li><a href="https://jwt.io">jwt.io</a> (including a list of client per language).<a href=".html"></a></li>
113<li>RFC : <a href="https://tools.ietf.org/html/rfc7519" class="uri">https://tools.ietf.org/html/rfc7519</a></li>
114<li><a href="https://float-middle.com/json-web-tokens-jwt-vs-sessions/" class="uri">https://float-middle.com/json-web-tokens-jwt-vs-sessions/</a></li>
115<li>HackerNews thread: <a href="https://news.ycombinator.com/item?id=11929267" class="uri">https://news.ycombinator.com/item?id=11929267</a></li>
116</ul>
117<h3 id="shaarli-jwt-token">Shaarli JWT Token</h3>
118<p>JWT tokens are composed by three parts, separated by a dot <code>.</code> and encoded in base64:</p>
119<pre><code>[header].[payload].[signature][](.html)</code></pre>
120<h4 id="header">Header</h4>
121<p>Shaarli only allow one hash algorithm, so the header will always be the same:</p>
122<div class="sourceCode"><pre class="sourceCode json"><code class="sourceCode json"><span class="fu">{</span>
123 <span class="dt">&quot;typ&quot;</span><span class="fu">:</span> <span class="st">&quot;JWT&quot;</span><span class="fu">,</span>
124 <span class="dt">&quot;alg&quot;</span><span class="fu">:</span> <span class="st">&quot;HS512&quot;</span>
125<span class="fu">}</span></code></pre></div>
126<p>Encoded in base64, it gives:</p>
127<pre><code>ewogICAgICAgICJ0eXAiOiAiSldUIiwKICAgICAgICAiYWxnIjogIkhTNTEyIgogICAgfQ==</code></pre>
128<h4 id="payload">Payload</h4>
129<p><strong>Validity duration</strong></p>
130<p>To avoid infinite token validity, JWT tokens must include their creation date in UNIX timestamp format (timezone independant - UTC) under the key <code>iat</code> (issued at). This token will be accepted during 9 minutes.</p>
131<div class="sourceCode"><pre class="sourceCode json"><code class="sourceCode json"><span class="fu">{</span>
132 <span class="dt">&quot;iat&quot;</span><span class="fu">:</span> <span class="dv">1468663519</span>
133<span class="fu">}</span></code></pre></div>
134<p>See <a href="https://tools.ietf.org/html/rfc7519#section-4.1.6">RFC reference</a>.<a href=".html"></a></p>
135<h4 id="signature">Signature</h4>
136<p>The signature authenticate the token validity. It contains the base64 of the header and the body, separated by a dot <code>.</code>, hashed in SHA512 with the API secret available in Shaarli administration page.</p>
137<p>Signature example with PHP:</p>
138<div class="sourceCode"><pre class="sourceCode php"><code class="sourceCode php"><span class="kw">$content</span> = <span class="fu">base64_encode</span><span class="ot">(</span><span class="kw">$header</span><span class="ot">)</span> . <span class="st">&#39;.&#39;</span> . <span class="fu">base64_encode</span><span class="ot">(</span><span class="kw">$payload</span><span class="ot">);</span>
139<span class="kw">$signature</span> = <span class="fu">hash_hmac</span><span class="ot">(</span><span class="st">&#39;sha512&#39;</span><span class="ot">,</span> <span class="kw">$content</span><span class="ot">,</span> <span class="kw">$secret</span><span class="ot">);</span></code></pre></div>
140<h3 id="complete-example">Complete example</h3>
141<h4 id="php">PHP</h4>
142<div class="sourceCode"><pre class="sourceCode php"><code class="sourceCode php"><span class="kw">function</span> generateToken<span class="ot">(</span><span class="kw">$secret</span><span class="ot">)</span> {
143 <span class="kw">$header</span> = <span class="fu">base64_encode</span><span class="ot">(</span><span class="st">&#39;{</span>
144<span class="st"> &quot;typ&quot;: &quot;JWT&quot;,</span>
145<span class="st"> &quot;alg&quot;: &quot;HS512&quot;</span>
146<span class="st"> }&#39;</span><span class="ot">);</span>
147 <span class="kw">$payload</span> = <span class="fu">base64_encode</span><span class="ot">(</span><span class="st">&#39;{</span>
148<span class="st"> &quot;iat&quot;: &#39;</span>. <span class="fu">time</span><span class="ot">()</span> .<span class="st">&#39;</span>
149<span class="st"> }&#39;</span><span class="ot">);</span>
150 <span class="kw">$signature</span> = <span class="fu">hash_hmac</span><span class="ot">(</span><span class="st">&#39;sha512&#39;</span><span class="ot">,</span> <span class="kw">$header</span> .<span class="st">&#39;.&#39;</span>. <span class="kw">$payload</span> <span class="ot">,</span> <span class="kw">$secret</span><span class="ot">);</span>
151 <span class="kw">return</span> <span class="kw">$header</span> .<span class="st">&#39;.&#39;</span>. <span class="kw">$payload</span> .<span class="st">&#39;.&#39;</span>. <span class="kw">$signature</span><span class="ot">;</span>
152}
153
154<span class="kw">$secret</span> = <span class="st">&#39;mysecret&#39;</span><span class="ot">;</span>
155<span class="kw">$token</span> = generateToken<span class="ot">(</span><span class="kw">$secret</span><span class="ot">);</span>
156<span class="fu">echo</span> <span class="kw">$token</span><span class="ot">;</span></code></pre></div>
157<blockquote>
158<p><code>ewogICAgICAgICJ0eXAiOiAiSldUIiwKICAgICAgICAiYWxnIjogIkhTNTEyIgogICAgfQ==.ewogICAgICAgICJpYXQiOiAxNDY4NjY3MDQ3CiAgICB9.1d2c54fa947daf594fdbf7591796195652c8bc63bffad7f6a6db2a41c313f495a542cbfb595acade79e83f3810d709b4251d7b940bbc10b531a6e6134af63a68</code></p>
159</blockquote>
160<div class="sourceCode"><pre class="sourceCode php"><code class="sourceCode php"><span class="kw">$options</span> = <span class="ot">[[](</span>.html<span class="ot">)</span>
161 <span class="st">&#39;http&#39;</span> =&gt; <span class="ot">[[](</span>.html<span class="ot">)</span>
162 <span class="st">&#39;method&#39;</span> =&gt; <span class="st">&#39;GET&#39;</span><span class="ot">,</span>
163 <span class="st">&#39;jwt&#39;</span> =&gt; <span class="kw">$token</span><span class="ot">,</span>
164 <span class="ot">],</span>
165<span class="ot">];</span>
166<span class="kw">$context</span> = <span class="fu">stream_context_create</span><span class="ot">(</span><span class="kw">$options</span><span class="ot">);</span>
167<span class="fu">file_get_contents</span><span class="ot">(</span><span class="kw">$apiEndpoint</span><span class="ot">,</span> <span class="kw">false</span><span class="ot">,</span> <span class="kw">$context</span><span class="ot">);</span></code></pre></div>
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