Configuring Certificate-Based Authentication for HttpFS

Starting from MEP-7.1.0, configuration of certificate-based authentication for HttpFS is no longer available. To configure certificate-based authentication for HttpFS, for MEP-7.0.x, you need to make changes to the server.xml and web.xml file and restart the HttpFS server. To use this method, each client requires a client certificate issued by trusted CA.

To enable certificate-based authentication, for MEP-7.0.x, perform the following steps:

Verify that the clientAuth attribute is set to "true" and set properties related to keystore and truststore in server.xml (/opt/mapr/httpfs/httpfs-1.0/share/hadoop/httpfs/tomcat/conf/server.xml).

For example:

<Connector port="" SSLEnabled="true"
maxThreads="150" scheme="https" secure="true" clientAuth="true" sslProtocol="TLS"
keystoreFile="/opt/mapr/conf/ssl_keystore"
keystorePass="<ssl-keystore-password>"
truststoreFile="/opt/mapr/conf/ssl_truststore"
truststorePass="<ssl-keystore-password>"/>

In web.xml (/opt/mapr/httpfs/httpfs-1.0/share/hadoop/httpfs/tomcat/webapps/webhdfs/WEB-INF/web.xml), un-comment the following section:

<security-constraint>
  <web-resource-collection>
    <web-resource-name>Protected Context</web-resource-name>
    <url-pattern>/*</url-pattern>
  </web-resource-collection>
  <auth-constraint>
    <role-name>sample</role-name>
  </auth-constraint>
  <user-data-constraint>
    <transport-guarantee>CONFIDENTIAL</transport-guarantee>
  </user-data-constraint>
</security-constraint>
              
<security-role>
  <role-name>sample</role-name>
</security-role>
              
<login-config>
  <auth-method>CLIENT-CERT</auth-method>
</login-config>

Verify that tomcat-users.xml (/opt/mapr/httpfs/httpfs-1.0/share/hadoop/httpfs/tomcat/conf/tomcat-users.xml) contains the roles and users in the certificates.
```
<tomcat-users> 
  <role rolename="sample"/> 
  <user name="CN=<hostname>" password="null" roles="sample" /> 
</tomcat-users>
```
Note: The name value should include information from your certificate. For example, <tomcat-users> <role rolename="sample"/> <user name="CN=www.mapr.com, OU=mapr, O=mapr, L=San Jose, ST=San Jose, C=CA" password="null" roles="sample" /> </tomcat-users> You can run the following command to view the contents of the certificate file: openssl x509 -text -in /opt/mapr/hue/hue-<version>/cert.pem
```
<tomcat-users>
  <role rolename="sample"/>
  <user name="CN=www.mapr.com, OU=mapr, O=mapr, L=San Jose, 
       ST=San Jose, C=CA" password="null" roles="sample" />
</tomcat-users>  
```

Restart the HttpFS server using the following command:

maprcli node services -name httpfs -action restart -nodes <space delimited list of nodes>