<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Authentication using TLS · Apache Pulsar</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="## TLS Authentication Overview"/><meta name="docsearch:version" content="2.4.0"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Authentication using TLS · Apache Pulsar"/><meta property="og:type" content="website"/><meta property="og:url" content="https://pulsar.apache.org/"/><meta property="og:description" content="## TLS Authentication Overview"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://pulsar.apache.org/img/pulsar.svg"/><link rel="shortcut icon" href="/img/pulsar.ico"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/atom-one-dark.min.css"/><link rel="alternate" type="application/atom+xml" href="https://pulsar.apache.org/blog/atom.xml" title="Apache Pulsar Blog ATOM Feed"/><link rel="alternate" type="application/rss+xml" href="https://pulsar.apache.org/blog/feed.xml" title="Apache Pulsar Blog RSS Feed"/><link rel="stylesheet" href="/css/code-blocks-buttons.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js"></script><script type="text/javascript" src="/js/custom.js"></script><script src="/js/scrollSpy.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/en"><img class="logo" src="/img/pulsar.svg" alt="Apache Pulsar"/></a><a href="/en/versions"><h3>2.4.0</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/en/2.4.0/getting-started-standalone" target="_self">Docs</a></li><li class=""><a href="/en/download" target="_self">Download</a></li><li class="siteNavGroupActive"><a href="/docs/en/2.4.0/client-libraries" target="_self">Clients</a></li><li class=""><a href="#restapis" target="_self">REST APIs</a></li><li class=""><a href="#cli" target="_self">Cli</a></li><li class=""><a href="/blog/" target="_self">Blog</a></li><li class=""><a href="#community" target="_self">Community</a></li><li class=""><a href="#apache" target="_self">Apache</a></li><li class=""><a href="https://pulsar-next.staged.apache.org/" target="_self">New Website (Beta)</a></li><span><li><a id="languages-menu" href="#"><img class="languages-icon" src="/img/language.svg" alt="Languages icon"/>English</a><div id="languages-dropdown" class="hide"><ul id="languages-dropdown-items"><li><a href="/docs/ja/2.4.0/security-tls-authentication">日本語</a></li><li><a href="/docs/fr/2.4.0/security-tls-authentication">Français</a></li><li><a href="/docs/ko/2.4.0/security-tls-authentication">한국어</a></li><li><a href="/docs/zh-CN/2.4.0/security-tls-authentication">中文</a></li><li><a href="/docs/zh-TW/2.4.0/security-tls-authentication">繁體中文</a></li><li><a href="https://crowdin.com/project/apache-pulsar" target="_blank" rel="noreferrer noopener">Help Translate</a></li></ul></div></li><script>
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<p>TLS authentication is an extension of <a href="/docs/en/2.4.0/security-tls-transport">TLS transport encryption</a>, but instead of only servers having keys and certs which the client uses to verify the server's identity, clients also have keys and certs which the server uses to verify the client's identity. You must have TLS transport encryption configured on your cluster before you can use TLS authentication. This guide assumes you already have TLS transport encryption configured.</p>
<h3><a class="anchor" aria-hidden="true" id="creating-client-certificates"></a><a href="#creating-client-certificates" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Creating client certificates</h3>
<p>Client certificates are generated using the same certificate authority as was used to generate the server certificates.</p>
<p>The biggest difference between client certs and server certs is that the <strong>common name</strong> for the client certificate is the <strong>role token</strong> which that client will be authenticated as.</p>
<p>First generate the key.</p>
<pre><code class="hljs css language-bash">$ openssl genrsa -out admin.key.pem 2048
</code></pre>
<p>Similar to the broker, the client expects the key to be in <a href="https://en.wikipedia.org/wiki/PKCS_8">PKCS 8</a> format, so convert it.</p>
<pre><code class="hljs css language-bash">$ openssl pkcs8 -topk8 -inform PEM -outform PEM \
      -<span class="hljs-keyword">in</span> admin.key.pem -out admin.key-pk8.pem -nocrypt
</code></pre>
<p>Generate the certificate request. When asked for a <strong>common name</strong>, enter the <strong>role token</strong> which you want this key pair to authenticate a client as.</p>
<pre><code class="hljs css language-bash">$ openssl req -config openssl.cnf \
      -key admin.key.pem -new -sha256 -out admin.csr.pem
</code></pre>
<blockquote>
<p>Note
If there is no openssl.cnf, please read <a href="http://pulsar.apache.org/docs/en/security-tls-transport/#certificate-authority">Certificate authority</a> to get the openssl.cnf.</p>
</blockquote>
<p>Sign with request with the certificate authority. Note that that client certs uses the <strong>usr_cert</strong> extension, which allows the cert to be used for client authentication.</p>
<pre><code class="hljs css language-bash">$ openssl ca -config openssl.cnf -extensions usr_cert \
      -days 1000 -notext -md sha256 \
      -<span class="hljs-keyword">in</span> admin.csr.pem -out admin.cert.pem
</code></pre>
<p>This will give you a cert, <code>admin.cert.pem</code>, and a key, <code>admin.key-pk8.pem</code>, which, with <code>ca.cert.pem</code>, can be used by clients to authenticate themselves to brokers and proxies as the role token <code>admin</code>.</p>
<blockquote>
<p>Note
If got &quot;unable to load CA private key&quot; error and the reason is &quot;No such file or directory: /etc/pki/CA/private/cakey.pem&quot; in this step. Please try :</p>
<pre><code class="hljs css language-bash">$ <span class="hljs-built_in">cd</span> /etc/pki/tls/misc/CA
$ ./CA -newca
</code></pre>
<p>to generate <code>cakey.pem</code> .</p>
</blockquote>
<h2><a class="anchor" aria-hidden="true" id="enabling-tls-authentication-"></a><a href="#enabling-tls-authentication-" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Enabling TLS Authentication ...</h2>
<h3><a class="anchor" aria-hidden="true" id="-on-brokers"></a><a href="#-on-brokers" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>... on Brokers</h3>
<p>To configure brokers to authenticate clients, put the following in <code>broker.conf</code>, alongside <a href="/docs/en/2.4.0/security-tls-transport#broker-configuration">the configuration to enable tls transport</a>:</p>
<pre><code class="hljs css language-properties"><span class="hljs-comment"># Configuration to enable authentication</span>
<span class="hljs-attr">authenticationEnabled</span>=<span class="hljs-string">true</span>
<span class="hljs-attr">authenticationProviders</span>=<span class="hljs-string">org.apache.pulsar.broker.authentication.AuthenticationProviderTls</span>
<span class="hljs-comment">
# operations and publish/consume from all topics</span>
<span class="hljs-attr">superUserRoles</span>=<span class="hljs-string">admin</span>
<span class="hljs-comment">
# Authentication settings of the broker itself. Used when the broker connects to other brokers, either in same or other clusters</span>
<span class="hljs-attr">brokerClientTlsEnabled</span>=<span class="hljs-string">true</span>
<span class="hljs-attr">brokerClientAuthenticationPlugin</span>=<span class="hljs-string">org.apache.pulsar.client.impl.auth.AuthenticationTls</span>
<span class="hljs-attr">brokerClientAuthenticationParameters</span>=<span class="hljs-string">tlsCertFile:/path/my-ca/admin.cert.pem,tlsKeyFile:/path/my-ca/admin.key-pk8.pem</span>
<span class="hljs-attr">brokerClientTrustCertsFilePath</span>=<span class="hljs-string">/path/my-ca/certs/ca.cert.pem</span>
</code></pre>
<h3><a class="anchor" aria-hidden="true" id="-on-proxies"></a><a href="#-on-proxies" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>... on Proxies</h3>
<p>To configure proxies to authenticate clients, put the following in <code>proxy.conf</code>, alongside <a href="/docs/en/2.4.0/security-tls-transport#proxy-configuration">the configuration to enable tls transport</a>:</p>
<p>The proxy should have its own client key pair for connecting to brokers. The role token for this key pair should be configured in the <code>proxyRoles</code> of the brokers. See the <a href="/docs/en/2.4.0/security-authorization">authorization guide</a> for more details.</p>
<pre><code class="hljs css language-properties"><span class="hljs-comment"># For clients connecting to the proxy</span>
<span class="hljs-attr">authenticationEnabled</span>=<span class="hljs-string">true</span>
<span class="hljs-attr">authenticationProviders</span>=<span class="hljs-string">org.apache.pulsar.broker.authentication.AuthenticationProviderTls</span>
<span class="hljs-comment">
# For the proxy to connect to brokers</span>
<span class="hljs-attr">brokerClientAuthenticationPlugin</span>=<span class="hljs-string">org.apache.pulsar.client.impl.auth.AuthenticationTls</span>
<span class="hljs-attr">brokerClientAuthenticationParameters</span>=<span class="hljs-string">tlsCertFile:/path/to/proxy.cert.pem,tlsKeyFile:/path/to/proxy.key-pk8.pem</span>
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="client-configuration"></a><a href="#client-configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Client configuration</h2>
<p>When TLS authentication, the client needs to connect via TLS transport, so you need to configure the client to use <code>https://</code> and port 8443 for the web service URL, and <code>pulsar+ssl://</code> and port 6651 for the broker service URL.</p>
<h3><a class="anchor" aria-hidden="true" id="cli-tools"></a><a href="#cli-tools" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>CLI tools</h3>
<p><a href="/docs/en/2.4.0/reference-cli-tools">Command-line tools</a> like <a href="/docs/en/2.4.0/reference-pulsar-admin"><code>pulsar-admin</code></a>, <a href="/docs/en/2.4.0/reference-cli-tools#pulsar-perf"><code>pulsar-perf</code></a>, and <a href="/docs/en/2.4.0/reference-cli-tools#pulsar-client"><code>pulsar-client</code></a> use the <code>conf/client.conf</code> config file in a Pulsar installation.</p>
<p>You'll need to add the following parameters to that file to use TLS authentication with Pulsar's CLI tools:</p>
<pre><code class="hljs css language-properties"><span class="hljs-attr">webServiceUrl</span>=<span class="hljs-string">https://broker.example.com:8443/</span>
<span class="hljs-attr">brokerServiceUrl</span>=<span class="hljs-string">pulsar+ssl://broker.example.com:6651/</span>
<span class="hljs-attr">useTls</span>=<span class="hljs-string">true</span>
<span class="hljs-attr">tlsAllowInsecureConnection</span>=<span class="hljs-string">false</span>
<span class="hljs-attr">tlsTrustCertsFilePath</span>=<span class="hljs-string">/path/to/ca.cert.pem</span>
<span class="hljs-attr">authPlugin</span>=<span class="hljs-string">org.apache.pulsar.client.impl.auth.AuthenticationTls</span>
<span class="hljs-attr">authParams</span>=<span class="hljs-string">tlsCertFile:/path/to/my-role.cert.pem,tlsKeyFile:/path/to/my-role.key-pk8.pem</span>
</code></pre>
<h3><a class="anchor" aria-hidden="true" id="java-client"></a><a href="#java-client" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Java client</h3>
<pre><code class="hljs css language-java"><span class="hljs-keyword">import</span> org.apache.pulsar.client.api.PulsarClient;

PulsarClient client = PulsarClient.builder()
    .serviceUrl(<span class="hljs-string">"pulsar+ssl://broker.example.com:6651/"</span>)
    .enableTls(<span class="hljs-keyword">true</span>)
    .tlsTrustCertsFilePath(<span class="hljs-string">"/path/to/ca.cert.pem"</span>)
    .authentication(<span class="hljs-string">"org.apache.pulsar.client.impl.auth.AuthenticationTls"</span>,
                    <span class="hljs-string">"tlsCertFile:/path/to/my-role.cert.pem,tlsKeyFile:/path/to/my-role.key-pk8.pem"</span>)
    .build();
</code></pre>
<h3><a class="anchor" aria-hidden="true" id="python-client"></a><a href="#python-client" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Python client</h3>
<pre><code class="hljs css language-python"><span class="hljs-keyword">from</span> pulsar <span class="hljs-keyword">import</span> Client, AuthenticationTLS

auth = AuthenticationTLS(<span class="hljs-string">"/path/to/my-role.cert.pem"</span>, <span class="hljs-string">"/path/to/my-role.key-pk8.pem"</span>)
client = Client(<span class="hljs-string">"pulsar+ssl://broker.example.com:6651/"</span>,
                tls_trust_certs_file_path=<span class="hljs-string">"/path/to/ca.cert.pem"</span>,
                tls_allow_insecure_connection=<span class="hljs-literal">False</span>,
                authentication=auth)
</code></pre>
<h3><a class="anchor" aria-hidden="true" id="c-client"></a><a href="#c-client" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>C++ client</h3>
<pre><code class="hljs css language-c++"><span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string">&lt;pulsar/Client.h&gt;</span></span>

pulsar::ClientConfiguration <span class="hljs-built_in">config</span>;
<span class="hljs-built_in">config</span>.setUseTls(<span class="hljs-literal">true</span>);
<span class="hljs-built_in">config</span>.setTlsTrustCertsFilePath(<span class="hljs-string">"/path/to/ca.cert.pem"</span>);
<span class="hljs-built_in">config</span>.setTlsAllowInsecureConnection(<span class="hljs-literal">false</span>);

pulsar::AuthenticationPtr auth = pulsar::AuthTls::create(<span class="hljs-string">"/path/to/my-role.cert.pem"</span>,
                                                         <span class="hljs-string">"/path/to/my-role.key-pk8.pem"</span>)
<span class="hljs-built_in">config</span>.setAuth(auth);

<span class="hljs-function">pulsar::<span class="hljs-built_in">Client</span> <span class="hljs-title">client</span><span class="hljs-params">(<span class="hljs-string">"pulsar+ssl://broker.example.com:6651/"</span>, <span class="hljs-built_in">config</span>)</span></span>;
</code></pre>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/en/2.4.0/security-tls-transport"><span class="arrow-prev">← </span><span>Transport Encryption using TLS</span></a><a class="docs-next button" href="/docs/en/2.4.0/security-token-client"><span>Next</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#tls-authentication-overview">TLS Authentication Overview</a><ul class="toc-headings"><li><a href="#creating-client-certificates">Creating client certificates</a></li></ul></li><li><a href="#enabling-tls-authentication-">Enabling TLS Authentication ...</a><ul class="toc-headings"><li><a href="#-on-brokers">... on Brokers</a></li><li><a href="#-on-proxies">... on Proxies</a></li></ul></li><li><a href="#client-configuration">Client configuration</a><ul class="toc-headings"><li><a href="#cli-tools">CLI tools</a></li><li><a href="#java-client">Java client</a></li><li><a href="#python-client">Python client</a></li><li><a href="#c-client">C++ client</a></li></ul></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="copyright">Copyright © 2022 The Apache Software Foundation. All Rights Reserved. Apache, Apache Pulsar and the Apache feather logo are trademarks of The Apache Software Foundation.</section><span><script>
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