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Modern & Secure PHP Applications
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Ben Edmunds
August 12, 2014
Technology
2
100
Modern & Secure PHP Applications
What's new in PHP along with a focus on building secure apps. Presented on CodeMentor 08/12/2014.
Ben Edmunds
August 12, 2014
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Transcript
PHP modern & secure
Who is this guy? Ben Edmunds ! @benedmunds http://benedmunds.com
Who is this guy? Ben Edmunds ! Open Source Author
PHP Town Hall Podcast CTO at Mindfulware
Welcome to the Future
Welcome to the Future Exceptions Namespaces Closures
Welcome to the Future Statics PDO Short Arrays Security
Legit Tools
Legit Tools Built-in Server Unit Testing Composer
Welcome to! the Future
Great Scott!
Exceptions
None
Exceptions try { //your code goes here } catch (Exception
$e) { die($e->getMessage()); }
Exceptions try { //your code goes here } catch (Exception
$e) { die($e->getMessage()); }
Closures
None
Closures Route::get(‘/', function(){ return View::make(‘index'); ! });
Closures Route::get(‘/', function(){ return View::make(‘index'); ! });
Namespaces
None
Namespaces namespace Illuminate\Console; class Command { //…
Namespaces use Illuminate\Console\Command; namespace Illuminate\Console; class Command { //…
Namespaces use Illuminate\Console\Command; namespace Illuminate\Console; class Command { //…
Statics
None
Statics Class Route { public static function get() { //…
}
Statics Route::get(); Class Route { public static function get() {
//… }
Statics Route::get(); Class Route { public static function get() {
//… }
Statics NO $this $var = self::varAtDefinition; ! $var = static::varAtExec;
Short Array! Syntax
None
Short Array Syntax $array = array( 0 => ‘value1’, 1
=> ‘value2’, );
Short Array Syntax $array = [ 0 => ‘value1’, 1
=> ‘value2’, ];
Short Array Syntax $array = [ 0 => ‘value1’, 1
=> ‘value2’, ];
PDO
None
PDO Cross System
PDO Cross System MS SQL MySQL Oracle PostgreSQL SQLite CUBRID
Firebird Informix ODBC & DB2 4D
PDO Cross System Safe Binding
PDO $stmt = $db->prepare(‘ SELECT * FROM users WHERE id=:id
’); ! $stmt->bindParam(‘:id’, $id); $stmt->execute();
Security
Security SQL Injection HTTPS Password Hashing
Security Authentication Safe Defaults XSS & CSRF
None
Security //escaping input $stmt->bindParam(‘:id’, $id);
Security //escaping input $stmt->bindParam(‘:id’, $id); //escaping output htmlentities($_POST[‘name’]);
Security HTTPS / SSL ! Encrypts traffic across the wire
! Trusted sender and receiver ! Required by OAUTH 2
Security //authentication - access control if (!$user->inGroup(‘admin’)) { return ‘ERROR
YO’; }
Security //authentication - brute force if ($user->loginAttempts > 5) {
return ‘CAUGHT YA’; }
Security //safe password hashing password_hash($_POST['pass']);
Security //safe password hashing password_hash($_POST['pass']); //password verification password_verify($_POST['pass'], $u->pass);
Security //safe defaults class Your Controller { protected $var1 =
‘default value’; ! function __construct() { … } }
Security //safe defaults $something = false; ! foreach ($array as
$k => $v) { $something = $v->foo; if ($something == ‘bar’) { … } }
Security //Non-Persistent XSS ! http://www.yourSite.com/ ?page_num=2&per_page=50 ! Send the link
to someone, boom
Security //Persistent XSS ! Same idea, except with data that
is saved to the server and re-displayed
Security //XSS Protection ! <h1>Title</h1> Hello <?=htmlentities($name)?> ! !
Security //Cross Site Request Forgery //(CSRF) ! http://yourSite.com/ users/12/delete !
!
Security //CSRF Protection ! POST / PUT / UPDATE /
DELETE behind forms with one-time use tokens ! !
Security //CSRF Protection ! function generateCsrf() { $token = mcrypt_create_iv(
16, MCRYPT_DEV_URANDOM); Session::flash('csrfToken', $token); return $token; }
Security //CSRF Protection ! if ( $_POST['token'] == Session::get(‘csrfToken') )
{ … } !
Legit Tools
None
Built-in ! Web Server
Built-in Server $ php -S localhost:8000 ! PHP 5.4.0 Development
Server started… Listening on localhost:8000 Document root is /home/ben/htdocs Press Ctrl-C to quit
Composer
Another Package Manager!?
Composer Sane Package Management
Composer Autoloading
Composer PEAR, ha! packagist.org
Composer / composer.json ! { "require": { "stripe/stripe-php": "dev-master", "twilio/sdk":
"dev-master" } }
Composer $ php composer.phar update $ php composer.phar install
Composer $client = new Services_Twilio($sid, $tkn); ! $client->account ->messages ->sendMessage(…)
Unit Testing
None
Unit Testing PHPUnit Behat Mink Selenium CodeCeption PHPSpec
Unit Testing class ApiAuthTest extends PHPUnit_Framework_TestCase { ! public function
testVerify() { ! $auth = new apiAuth(); $this->assertTrue($auth->verify());
Unit Testing class ApiAuthTest extends PHPUnit_Framework_TestCase { ! public function
testVerify() { ! $auth = new apiAuth(); $this->assertTrue($auth->verify());
Unit Testing $ phpunit tests ! PHPUnit 3.3.17 by Sebastian
Bergmann. Time: 0.01 seconds OK (1 tests, 1 assertions)
Resources
None
Resources PHP.net
Resources Modern Frameworks Laravel Symfony2 Fuel PHP SlimPHP 2 Aura
for PHP Silex
Resources leanpub.com/ phptherightway PHPtheRightWay.com
Resources BuildSecurePHPapps.com Coupon Code: codementor $3 off http://buildsecurephpapps.com/?coupon=codementor
Q/A TIME! Ben Edmunds @benedmunds http://benedmunds.com http://buildsecurephpapps.com/?coupon=codementor