ci-bonfire / Sprint

		// Grab the user that corresponds to that "username"

		// exact field determined in the api config file - api.auth_field setting.

		$user = $this->user_model->as_array()->find_by( config_item('api.auth_field'), $digest['username'] );

		if (!  $user)

		{

			$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );

			// If an email is used, log the attempt

            if (config_item('api.auth_field') === 'email')

            {

                $this->ci->login_model->recordLoginAttempt($digest['username']);

            }

			return false;

		}

		// Calc the correct response

		$A1 = $user['digest_key'];

		}

		$valid_response = md5($A1 .':'. $digest['nonce'].':'. $digest['nc'] .':'. $digest['cnonce'] .':'. $digest['qop'] .':'. $A2);

		if ($digest['response'] != $valid_response)

		{

			$this->ci->output->set_header( sprintf('WWW-Authenticate: Digest realm="%s", nonce="%s", opaque="%s"', config_item('api.realm'), $nonce, $opaque) );

			// If an email is used, log the attempt

            if (config_item('api.auth_field') === 'email')

            {

                $this->ci->login_model->recordLoginAttempt($digest['username']);

            }

			return false;

		}

		$this->user = $user;