/module/Users/src/Users/Authentication/Adapter.php

<?php
/**
 * Perforce Swarm
 *
 * @copyright   2012 Perforce Software. All rights reserved.
 * @license     Please see LICENSE.txt in top-level folder of this distribution.
 * @version     <release>/<patch>
 */

namespace Users\Authentication;

use P4\Connection\Connection;
use P4\Connection\ConnectionInterface;
use P4\Connection\LoginException;
use P4\Connection\Exception\CommandException;
use Zend\Authentication\Adapter\AdapterInterface;
use Zend\Authentication\Result;

class Adapter implements AdapterInterface
{
    protected $user;
    protected $password;
    protected $p4;
    protected $userP4;

    /**
     * Sets username, password and connection for authentication
     *
     * @return void
     */
    public function __construct($user, $password, ConnectionInterface $p4)
    {
        $this->user     = $user;
        $this->password = $password;
        $this->p4       = $p4;
    }

    /**
     * Performs an authentication attempt
     *
     * @return \Zend\Authentication\Result
     * @throws \Zend\Authentication\Adapter\Exception\ExceptionInterface
     *               If authentication cannot be performed
     */
    public function authenticate()
    {
        // authenticate against current p4 server.
        $this->userP4 = Connection::factory(
            $this->p4->getPort(),
            $this->user,
            null,
            $this->password
        );

        // if the password looks like it may be a ticket;
        // test it for that case first
        if (preg_match('/^[A-Z0-9]{32}$/', $this->password)) {
            try {
                $this->userP4->run('login', '-s');

                return new Result(
                    Result::SUCCESS,
                    array('id' => $this->user, 'ticket' => $this->password)
                );
            } catch (CommandException $e) {
                // looks like it isn't a ticket, no problem we'll try to login
            }
        }

        // try to login using the password
        try {
            $ticket = $this->userP4->login();

            return new Result(
                Result::SUCCESS,
                array('id' => $this->user, 'ticket' => $ticket)
            );
        } catch (LoginException $e) {
            return new Result(
                $e->getCode(),
                null,
                array($e->getMessage())
            );
        }
    }

    /**
     * Get the connection instance most recently used to authenticate the user.
     *
     * @return  Connection|null     connection used for login or null if no auth attempted
     */
    public function getUserP4()
    {
        return $this->userP4;
    }
}