src/Riak/Node/Builder.php
public function usingCertificateAuthentication($certificate, $password = '')
    {
        $this->config->setCertificate($certificate);
        $this->config->setCertificatePassword($password);
        $this->config->setAuth(true);

        throw new Node\Builder\Exception('Riak over HTTP does not support Certificate Authentication.');

        //return $this;
    }
public function usingCertificateAuthentication($certificate, $password = '')
    {
        $this->config->setCertificate($certificate);
        $this->config->setCertificatePassword($password);
        $this->config->setAuth(true);

        throw new Node\Builder\Exception('Riak over HTTP does not support Certificate Authentication.');

        //return $this;
    }
usingCertificateAuthentication

Build nodes with certificate authentication

User authentication and access rules are only available in Riak versions 2 and above. To use this feature, TSL
is required to communicate with your Riak nodes.

CURRENTLY NOT SUPPORTED OVER THE RIAK HTTP API

@param $certificate
@param string $password

@return $this
@throws Builder\Exception