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## Name:

**Dapphp\Radius** - A pure PHP RADIUS client based on the SysCo/al implementation

## Author:

* Drew Phillips <drew@drew-phillips.com>
* SysCo/al <developer@sysco.ch> (http://developer.sysco.ch/php/)

## Description:

**Dapphp\Radius** is a pure PHP RADIUS client for authenticating users against
a RADIUS server in PHP.  It currently supports basic RADIUS auth using PAP,
CHAP (MD5), MSCHAP v1, and EAP-MSCHAP v2.  The current 2.5.x branch is tested
to work with the following RADIUS servers:

- Microsoft Windows Server 2019 Network Policy Server
- Microsoft Windows Server 2016 Network Policy Server
- Microsoft Windows Server 2012 Network Policy Server
- FreeRADIUS 2 and above

PAP authentication has been tested on:

- Microsoft Radius server IAS
- Mideye RADIUS Server
- Radl
- RSA SecurID
- VASCO Middleware 3.0 server
- WinRadius
- ZyXEL ZyWALL OTP

The PHP openssl extension is required if using MSCHAP v1 or v2.  For older PHP
versions that have mcrypt without openssl support, then mcrypt is used.

## Installation:

The recommended way to install `dapphp/radius` is using [Composer](https://getcomposer.org).
If you are already using composer, simple run `composer require dapphp/radius` or add
`dapphp/radius` to your composer.json file's `require` section.

Standalone installation is also supported and a SPL autoloader is provided.
(Don't use the standalone autoloader if you're using Composer!).

To install standalone, download the release archive and extract to a location
on your server.  In your application, `require_once 'radius/autoload.php';` and
then you can use the class.

## Examples:

See the `examples/` directory for working examples. The RADIUS server address, secret, and credentials are read from
environment variables and default to:

    RADIUS_SERVER_ADDR=192.168.0.20
    RADIUS_USER=nemo
    RADIUS_PASS=arctangent
    RADIUS_SECRET=xyzzy5461

To print RADIUS debug info, specify the `-v` option.

Example:

    RADIUS_SERVER_ADDR=10.0.100.1 RADIUS_USER=radtest php example/client.php -v

## Synopsis:

	<?php

	use Dapphp\Radius\Radius;

	require_once '/path/to/radius/autoload.php';
	// or, if using composer
	require_once '/path/to/vendor/autoload.php';

	$client = new Radius();

	// set server, secret, and basic attributes
	$client->setServer('12.34.56.78') // RADIUS server address
	       ->setSecret('radius shared secret')
	       ->setNasIpAddress('10.0.1.2') // NAS server address
	       ->setAttribute(32, 'login');  // NAS identifier

	// PAP authentication; returns true if successful, false otherwise
	$authenticated = $client->accessRequest($username, $password);

	// CHAP-MD5 authentication
	$client->setChapPassword($password); // set chap password
	$authenticated = $client->accessRequest($username); // authenticate, don't specify pw here

	// MSCHAP v1 authentication
	$client->setMSChapPassword($password); // set ms chap password (uses openssl or mcrypt)
	$authenticated = $client->accessRequest($username);

	// EAP-MSCHAP v2 authentication
	$authenticated = $client->accessRequestEapMsChapV2($username, $password);

	if ($authenticated === false) {
	    // false returned on failure
	    echo sprintf(
	        "Access-Request failed with error %d (%s).\n",
	        $client->getErrorCode(),
	        $client->getErrorMessage()
	    );
	} else {
	    // access request was accepted - client authenticated successfully
	    echo "Success!  Received Access-Accept response from RADIUS server.\n";
	}

## Advanced Usage:

	// Authenticating against a RADIUS cluster (each server needs the same secret).
	// Each server in the list is tried until auth success or failure.  The
	// next server is tried on timeout or other error.
	// Set the secret and any required attributes first.

	$servers = [ 'server1.radius.domain', 'server2.radius.domain' ];
	// or
	$servers = gethostbynamel("radius.site.domain"); // gets list of IPv4 addresses to a given host

	$authenticated = $client->accessRequestList($servers, $username, $password);
	// or
	$authenticated = $client->accessRequestEapMsChapV2List($servers, $username, $password);


	// Setting vendor specific attributes
	// Many vendor IDs are available in \Dapphp\Radius\VendorId
	// e.g. \Dapphp\Radius\VendorId::MICROSOFT
	$client->setVendorSpecificAttribute($vendorId, $attributeNumber, $rawValue);

	// Retrieving attributes from RADIUS responses after receiving a failure or success response
	$value = $client->getAttribute($attributeId);

	// Get an array of all received attributes
	$attributes = getReceivedAttributes();

	// Debugging
	// Prior to sending a request, call
	$client->setDebug(true); // enable debug output on console
	// Shows what attributes are sent and received, and info about the request/response


## Requirements:

* PHP 5.3 or greater

## TODO:

- Set attributes by name, rather than number
- Vendor specific attribute dictionaries?
- Test with more implementations and confirm working
- Accounting?

## Copyright:

    Copyright (c) 2008, SysCo systemes de communication sa
    SysCo (tm) is a trademark of SysCo systemes de communication sa
    (http://www.sysco.ch/)
    All rights reserved.

    Copyright (c) 2018, Drew Phillips
    (https://drew-phillips.com)

    Pure PHP radius class is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation, either version 3 of the License,
    or (at your option) any later version.

    Pure PHP radius class is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with Pure PHP radius class.
    If not, see <http://www.gnu.org/licenses/>

## Licenses:

This library makes use of the Crypt_CHAP PEAR library.  See `lib/Pear_CHAP.php`.

	Copyright (c) 2002-2010, Michael Bretterklieber <michael@bretterklieber.com>
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	1. Redistributions of source code must retain the above copyright
	   notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.
	3. The names of the authors may not be used to endorse or promote products
	   derived from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
	ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
	INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
	EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	This code cannot simply be copied and put under the GNU Public License or
	any other GPL-like (LGPL, GPL2) License.