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* Using namespace(s): https://www.reddit.com/r/programming/comments/2gwqcr/multifactor_authentication_or_twofactor_auth_for/ckr9e1g

Browse Source 
* Added simple "PSR-4" autoloader
* Classes and interfaces to separate files
* Updated README for namespaces
This commit is contained in:
RobThree
2014-09-24 23:33:15 +02:00
parent b50661c60a
commit 004739be32
11 changed files with 420 additions and 343 deletions
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README.md
+7 -9
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@@ -18,8 +18,7 @@ Here are some code snippets that should help you get started...
````php
// Start by including the TwoFactorAuth.php file which contains all you need (for now)
require_once 'src/TwoFactorAuth.php';
$tfa = new TwoFactorAuth('My Company');
$tfa = new RobThree\TwoFactorAuth\TwoFactorAuth('My Company');
````
The TwoFactorAuth class constructor accepts 5 parameters (all optional):
@@ -109,11 +108,13 @@ The `getMimeType()` method should return the [MIME type](http://en.wikipedia.org
All you need to do is return the QR-code as binary image data and you're done. All parts of the `$qrtext` have been escaped for you (but note: you *may* need to escape the entire `$qrtext` just once more when passing the data to another server as GET-parameter).
Let's see if we can use [PHP QR Code](http://phpqrcode.sourceforge.net/) to implement our own, custom, no-3rd-parties-allowed-here, provider. We start with downloading the [required (single) file](https://github.com/t0k4rt/phpqrcode/blob/master/phpqrcode.php) and putting it in our `src/` directory where `TwoFactorAuth.php` is located as well. Now let's implement the provider: create another file named `myprovider.php` in the `src` directory and paste in this content:
Let's see if we can use [PHP QR Code](http://phpqrcode.sourceforge.net/) to implement our own, custom, no-3rd-parties-allowed-here, provider. We start with downloading the [required (single) file](https://github.com/t0k4rt/phpqrcode/blob/master/phpqrcode.php) and putting it in the directory where `TwoFactorAuth.php` is located as well. Now let's implement the provider: create another file named `myprovider.php` in the `Providers` directory and paste in this content:
````php
<?php
require_once 'phpqrcode.php'; // Yeah, we're gonna need that
require_once '../phpqrcode.php'; // Yeah, we're gonna need that
namespace RobThree\TwoFactorAuth\Providers
class MyProvider implements IQRCodeProvider {
public function getMimeType() {
@@ -136,11 +137,8 @@ That's it. We're done! We've implemented our own provider (with help of PHP QR C
````php
<?php
require_once 'src/TwoFactorAuth.php';
require_once 'src/myprovider.php';
$mp = new MyProvider();
$tfa = new TwoFactorAuth('My Company', 6, 30, 'sha1', $mp);
$mp = new RobThree\TwoFactorAuth\TwoFactorAuth\Providers\MyProvider();
$tfa = new RobThree\TwoFactorAuth\TwoFactorAuth\TwoFactorAuth('My Company', 6, 30, 'sha1', $mp);
$secret = $tfa->createSecret();
?>
<p><img src="<?php $tfa->getQRCodeImageAsDataUri('Bob Ross', $secret) ?>"></p>
RobThree/TwoFactorAuth/Providers/BaseHTTPQRCodeProvider.php
+29
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@@ -0,0 +1,29 @@
<?php
namespace RobThree\TwoFactorAuth\Providers;
abstract class BaseHTTPQRCodeProvider implements IQRCodeProvider
{
protected $verifyssl;
protected function getContent($url)
{
$ch = curl_init();
curl_setopt_array($ch, array(
CURLOPT_URL => $url,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_MAXREDIRS => 3,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_CONNECTTIMEOUT => 10,
CURLOPT_DNS_CACHE_TIMEOUT => 10,
CURLOPT_TIMEOUT => 10,
CURLOPT_SSL_VERIFYPEER => $this->verifyssl,
CURLOPT_USERAGENT => 'TwoFactorAuth'
));
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
}
RobThree/TwoFactorAuth/Providers/GoogleQRCodeProvider.php
+39
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@@ -0,0 +1,39 @@
<?php
namespace RobThree\TwoFactorAuth\Providers;
// https://developers.google.com/chart/infographics/docs/qr_codes
class GoogleQRCodeProvider extends BaseHTTPQRCodeProvider
{
public $errorcorrectionlevel;
public $margin;
function __construct($verifyssl = false, $errorcorrectionlevel = 'L', $margin = 1)
{
if (!is_bool($verifyssl))
throw new Exception('VerifySSL must be bool');
$this->verifyssl = $verifyssl;
$this->errorcorrectionlevel = $errorcorrectionlevel;
$this->margin = $margin;
}
public function getMimeType()
{
return 'image/png';
}
public function getQRCodeImage($qrtext, $size)
{
return $this->getContent($this->getUrl($qrtext, $size));
}
public function getUrl($qrtext, $size)
{
return 'https://chart.googleapis.com/chart?cht=qr'
. '&chs=' . $size . 'x' . $size
. '&chld=' . $this->errorcorrectionlevel . '|' . $this->margin
. '&chl=' . rawurlencode($qrtext);
}
}
RobThree/TwoFactorAuth/Providers/IQRCodeProvider.php
+9
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@@ -0,0 +1,9 @@
<?php
namespace RobThree\TwoFactorAuth\Providers;
interface IQRCodeProvider
{
public function getQRCodeImage($qrtext, $size);
public function getMimeType();
}
RobThree/TwoFactorAuth/Providers/QRServerProvider.php
+70
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@@ -0,0 +1,70 @@
<?php
namespace RobThree\TwoFactorAuth\Providers;
// http://goqr.me/api/doc/create-qr-code/
class QRServerProvider extends BaseHTTPQRCodeProvider
{
public $errorcorrectionlevel;
public $margin;
public $qzone;
public $bgcolor;
public $color;
public $format;
function __construct($verifyssl = false, $errorcorrectionlevel = 'L', $margin = 4, $qzone = 1, $bgcolor = 'ffffff', $color = '000000', $format = 'png')
{
if (!is_bool($verifyssl))
throw new Exception('VerifySSL must be bool');
$this->verifyssl = $verifyssl;
$this->errorcorrectionlevel = $errorcorrectionlevel;
$this->margin = $margin;
$this->qzone = $qzone;
$this->bgcolor = $bgcolor;
$this->color = $color;
$this->format = $format;
}
public function getMimeType()
{
switch (strtolower($this->format))
{
case 'png':
return 'image/png';
case 'gif':
return 'image/gif';
case 'jpg':
case 'jpeg':
return 'image/jpeg';
case 'svg':
return 'image/svg+xml';
case 'eps':
return 'application/postscript';
}
}
public function getQRCodeImage($qrtext, $size)
{
return $this->getContent($this->getUrl($qrtext, $size));
}
private function decodeColor($value)
{
return vsprintf('%d-%d-%d', sscanf($value, "%02x%02x%02x"));
}
public function getUrl($qrtext, $size)
{
return 'https://api.qrserver.com/v1/create-qr-code/'
. '?size=' . $size . 'x' . $size
. '&ecc=' . strtoupper($this->errorcorrectionlevel)
. '&margin=' . $this->margin
. '&qzone=' . $this->qzone
. '&bgcolor=' . $this->decodeColor($this->bgcolor)
. '&color=' . $this->decodeColor($this->color)
. '&format=' . strtolower($this->format)
. '&data=' . rawurlencode($qrtext);
}
}
RobThree/TwoFactorAuth/Providers/QRicketProvider.php
+53
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@@ -0,0 +1,53 @@
<?php
namespace RobThree\TwoFactorAuth\Providers;
// http://qrickit.com/qrickit_apps/qrickit_api.php
class QRicketProvider extends BaseHTTPQRCodeProvider
{
public $errorcorrectionlevel;
public $margin;
public $qzone;
public $bgcolor;
public $color;
public $format;
function __construct($errorcorrectionlevel = 'L', $bgcolor = 'ffffff', $color = '000000', $format = 'p')
{
$this->verifyssl = false;
$this->errorcorrectionlevel = $errorcorrectionlevel;
$this->bgcolor = $bgcolor;
$this->color = $color;
$this->format = $format;
}
public function getMimeType()
{
switch (strtolower($this->format))
{
case 'p':
return 'image/png';
case 'g':
return 'image/gif';
case 'j':
return 'image/jpeg';
}
}
public function getQRCodeImage($qrtext, $size)
{
return $this->getContent($this->getUrl($qrtext, $size));
}
public function getUrl($qrtext, $size)
{
return 'http://qrickit.com/api/qr'
. '?qrsize=' . $size
. '&e=' . strtolower($this->errorcorrectionlevel)
. '&bgdcolor=' . $this->bgcolor
. '&fgdcolor=' . $this->color
. '&t=' . strtolower($this->format)
. '&d=' . rawurlencode($qrtext);
}
}
RobThree/TwoFactorAuth/TwoFactorAuth.php
+147
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@@ -0,0 +1,147 @@
<?php
namespace RobThree\TwoFactorAuth;
// Based on / inspired by: https://github.com/PHPGangsta/GoogleAuthenticator
// Algorithms, digits, period etc. explained: https://code.google.com/p/google-authenticator/wiki/KeyUriFormat
class TwoFactorAuth
{
private $algorithm;
private $period;
private $digits;
private $issuer;
private $qrcodeprovider;
private static $_base32;
private static $_base32lookup = array();
private static $_supportedalgos = array('sha1', 'sha256', 'sha512', 'md5');
function __construct($issuer = null, $digits = 6, $period = 30, $algorithm = 'sha1', $qrcodeprovider = null)
{
$this->issuer = $issuer;
if (!is_int($digits) || $digits <= 0)
throw new Exception('Digits must be int > 0');
$this->digits = $digits;
if (!is_int($period) || $period <= 0)
throw new Exception('Period must be int > 0');
$this->period = $period;
$algorithm = strtolower(trim($algorithm));
if (!in_array($algorithm, self::$_supportedalgos))
throw new Exception('Unsupported algorithm: ' . $algorithm);
$this->algorithm = $algorithm;
if ($qrcodeprovider==null)
$qrcodeprovider = new Providers\GoogleQRCodeProvider();
if (!($qrcodeprovider instanceof Providers\IQRCodeProvider))
throw new Exception('QRCodeProvider must implement IQRCodeProvider');
$this->qrcodeprovider = $qrcodeprovider;
self::$_base32 = str_split('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=');
self::$_base32lookup = array_flip(self::$_base32);
}
/**
* Create a new secret
*/
public function createSecret($bits = 80)
{
$secret = '';
$bytes = ceil($bits / 5); //We use 5 bits of each byte
$rnd = openssl_random_pseudo_bytes($bytes);
for ($i = 0; $i < $bytes; $i++)
$secret .= self::$_base32[ord($rnd[$i]) & 31]; //Mask out left 3 bits for 0-31 values
return $secret;
}
/**
* Calculate the code with given secret and point in time
*/
public function getCode($secret, $time = null)
{
$secretkey = $this->base32Decode($secret);
$ts = "\0\0\0\0" . pack('N*', $this->getTimeSlice($this->getTime($time))); // Pack time into binary string
$hm = hash_hmac($this->algorithm, $ts, $secretkey, true); // Hash it with users secret key
$hashpart = substr($hm, ord(substr($hm, -1)) & 0x0F, 4); // Use last nibble of result as index/offset and grab 4 bytes of the result
$value = unpack('N', $hashpart); // Unpack binary value
$value = $value[1] & 0x7FFFFFFF; // Drop MSB, keep only 31 bits
return str_pad($value % pow(10, $this->digits), $this->digits, '0', STR_PAD_LEFT);
}
/**
* Check if the code is correct. This will accept codes starting from ($discrepancy * $period) sec ago to ($discrepancy * period) sec from now
*/
public function verifyCode($secret, $code, $discrepancy = 1, $time = null)
{
$t = $this->getTime($time);
for ($i = -$discrepancy; $i <= $discrepancy; $i++)
{
if (strcmp($this->getCode($secret, $t + ($i * $this->period)), $code) === 0)
return true;
}
return false;
}
/**
* Get data-uri of QRCode
*/
public function getQRCodeImageAsDataUri($label, $secret, $size = 200)
{
if (!is_int($size) || $size < 0)
throw new Exception('Size must be int > 0');
return 'data:'
. $this->qrcodeprovider->getMimeType()
. ';base64,'
. base64_encode($this->qrcodeprovider->getQRCodeImage($this->getQRText($label, $secret), $size));
}
private function getTime($time)
{
return ($time === null) ? time() : $time;
}
private function getTimeSlice($time = null, $offset = 0)
{
return (int)floor($time / $this->period) + ($offset * $this->period);
}
/**
* Builds a string to be encoded in a QR code
*/
private function getQRText($label, $secret)
{
return 'otpauth://totp/' . rawurlencode($label)
. '?secret=' . rawurlencode($secret)
. '&issuer=' . rawurlencode($this->issuer)
. '&period=' . intval($this->period)
. '&algorithm=' . rawurlencode(strtoupper($this->algorithm))
. '&digits=' . intval($this->digits);
}
private function base32Decode($value)
{
if (strlen($value)==0) return '';
$s = '';
foreach (str_split($value) as $c)
{
if ($c !== '=')
$s .= str_pad(decbin(self::$_base32lookup[$c]), 5, 0, STR_PAD_LEFT);
}
$l = strlen($s);
$r = trim(chunk_split(substr($s, 0, $l - ($l % 8)), 8, ' '));
$o = '';
foreach (explode(' ', $r) as $b)
$o .= chr(bindec(str_pad($b, 8, 0, STR_PAD_RIGHT)));
return $o;
}
}
TwoFactorAuth.phpproj
+10 -2
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@@ -23,12 +23,20 @@
</PropertyGroup>
<ItemGroup>
<Compile Include="demo.php" />
<Compile Include="src\TwoFactorAuth.php" />
<Compile Include="loader.php" />
<Compile Include="RobThree\TwoFactorAuth\Providers\BaseHTTPQRCodeProvider.php" />
<Compile Include="RobThree\TwoFactorAuth\Providers\GoogleQRCodeProvider.php" />
<Compile Include="RobThree\TwoFactorAuth\Providers\IQRCodeProvider.php" />
<Compile Include="RobThree\TwoFactorAuth\Providers\QRicketProvider.php" />
<Compile Include="RobThree\TwoFactorAuth\Providers\QRServerProvider.php" />
<Compile Include="RobThree\TwoFactorAuth\TwoFactorAuth.php" />
<Compile Include=".gitignore" />
<Compile Include="README.md" />
</ItemGroup>
<ItemGroup>
<Folder Include="src\" />
<Folder Include="RobThree\" />
<Folder Include="RobThree\TwoFactorAuth\" />
<Folder Include="RobThree\TwoFactorAuth\Providers\" />
</ItemGroup>
<ItemGroup>
<Content Include="LICENSE" />
demo.php
+6 -3
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@@ -7,9 +7,12 @@
<ol>
<?php
error_reporting(-1);
require_once 'src/TwoFactorAuth.php';
$tfa = new TwoFactorAuth('MyApp');
require_once 'loader.php';
Loader::register('RobThree','RobThree');
use RobThree\TwoFactorAuth;
$tfa = new TwoFactorAuth\TwoFactorAuth('MyApp', 6, 30, 'sha1', new TwoFactorAuth\Providers\QRicketProvider());
echo '<li>First create a secret and associate it with a user';
$secret = $tfa->createSecret();
loader.php
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@@ -0,0 +1,50 @@
<?php
//http://www.leaseweblabs.com/2014/04/psr-0-psr-4-autoloading-classes-php/
class Loader
{
protected static $parentPath = null;
protected static $paths = null;
protected static $files = null;
protected static $nsChar = '\\';
protected static $initialized = false;
protected static function initialize()
{
if (static::$initialized) return;
static::$initialized = true;
static::$parentPath = __FILE__;
for ($i=substr_count(get_class(), static::$nsChar);$i>=0;$i--) {
static::$parentPath = dirname(static::$parentPath);
}
static::$paths = array();
static::$files = array(__FILE__);
}
public static function register($path,$namespace) {
if (!static::$initialized) static::initialize();
static::$paths[$namespace] = trim($path,DIRECTORY_SEPARATOR);
}
public static function load($class) {
if (class_exists($class,false)) return;
if (!static::$initialized) static::initialize();
foreach (static::$paths as $namespace => $path) {
if (!$namespace || $namespace.static::$nsChar === substr($class, 0, strlen($namespace.static::$nsChar))) {
$fileName = substr($class,strlen($namespace.static::$nsChar)-1);
$fileName = str_replace(static::$nsChar, DIRECTORY_SEPARATOR, ltrim($fileName,static::$nsChar));
$fileName = static::$parentPath.DIRECTORY_SEPARATOR.$path.DIRECTORY_SEPARATOR.$fileName.'.php';
if (file_exists($fileName)) {
include $fileName;
return true;
}
}
}
return false;
}
}
spl_autoload_register(array('Loader', 'load'));
src/TwoFactorAuth.php
-329
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@@ -1,329 +0,0 @@
<?php
// Based on / inspired by: https://github.com/PHPGangsta/GoogleAuthenticator
// Algorithms, digits, period etc. explained: https://code.google.com/p/google-authenticator/wiki/KeyUriFormat
class TwoFactorAuth
{
private $algorithm;
private $period;
private $digits;
private $issuer;
private $qrcodeprovider;
private static $_base32;
private static $_base32lookup = array();
private static $_supportedalgos = array('sha1', 'sha256', 'sha512', 'md5');
function __construct($issuer = null, $digits = 6, $period = 30, $algorithm = 'sha1', $qrcodeprovider = null)
{
$this->issuer = $issuer;
if (!is_int($digits) || $digits <= 0)
throw new Exception('Digits must be int > 0');
$this->digits = $digits;
if (!is_int($period) || $period <= 0)
throw new Exception('Period must be int > 0');
$this->period = $period;
$algorithm = strtolower(trim($algorithm));
if (!in_array($algorithm, self::$_supportedalgos))
throw new Exception('Unsupported algorithm: ' . $algorithm);
$this->algorithm = $algorithm;
if ($qrcodeprovider==null)
$qrcodeprovider = new GoogleQRCodeProvider();
if (!($qrcodeprovider instanceof IQRCodeProvider))
throw new Exception('QRCodeProvider must implement IQRCodeProvider');
$this->qrcodeprovider = $qrcodeprovider;
self::$_base32 = str_split('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=');
self::$_base32lookup = array_flip(self::$_base32);
}
/**
* Create a new secret
*/
public function createSecret($bits = 80)
{
$secret = '';
$bytes = ceil($bits / 5); //We use 5 bits of each byte
$rnd = openssl_random_pseudo_bytes($bytes);
for ($i = 0; $i < $bytes; $i++)
$secret .= self::$_base32[ord($rnd[$i]) & 31]; //Mask out left 3 bits for 0-31 values
return $secret;
}
/**
* Calculate the code with given secret and point in time
*/
public function getCode($secret, $time = null)
{
$secretkey = $this->base32Decode($secret);
$ts = "\0\0\0\0" . pack('N*', $this->getTimeSlice($this->getTime($time))); // Pack time into binary string
$hm = hash_hmac($this->algorithm, $ts, $secretkey, true); // Hash it with users secret key
$hashpart = substr($hm, ord(substr($hm, -1)) & 0x0F, 4); // Use last nibble of result as index/offset and grab 4 bytes of the result
$value = unpack('N', $hashpart); // Unpack binary value
$value = $value[1] & 0x7FFFFFFF; // Drop MSB, keep only 31 bits
return str_pad($value % pow(10, $this->digits), $this->digits, '0', STR_PAD_LEFT);
}
/**
* Check if the code is correct. This will accept codes starting from ($discrepancy * $period) sec ago to ($discrepancy * period) sec from now
*/
public function verifyCode($secret, $code, $discrepancy = 1, $time = null)
{
$t = $this->getTime($time);
for ($i = -$discrepancy; $i <= $discrepancy; $i++)
{
if (strcmp($this->getCode($secret, $t + ($i * $this->period)), $code) === 0)
return true;
}
return false;
}
/**
* Get data-uri of QRCode
*/
public function getQRCodeImageAsDataUri($label, $secret, $size = 200)
{
if (!is_int($size) || $size < 0)
throw new Exception('Size must be int > 0');
return 'data:'
. $this->qrcodeprovider->getMimeType()
. ';base64,'
. base64_encode($this->qrcodeprovider->getQRCodeImage($this->getQRText($label, $secret), $size));
}
private function getTime($time)
{
return ($time === null) ? time() : $time;
}
private function getTimeSlice($time = null, $offset = 0)
{
return (int)floor($time / $this->period) + ($offset * $this->period);
}
/**
* Builds a string to be encoded in a QR code
*/
private function getQRText($label, $secret)
{
return 'otpauth://totp/' . rawurlencode($label)
. '?secret=' . rawurlencode($secret)
. '&issuer=' . rawurlencode($this->issuer)
. '&period=' . intval($this->period)
. '&algorithm=' . rawurlencode(strtoupper($this->algorithm))
. '&digits=' . intval($this->digits);
}
private function base32Decode($value)
{
if (strlen($value)==0) return '';
$s = '';
foreach (str_split($value) as $c)
{
if ($c !== '=')
$s .= str_pad(decbin(self::$_base32lookup[$c]), 5, 0, STR_PAD_LEFT);
}
$l = strlen($s);
$r = trim(chunk_split(substr($s, 0, $l - ($l % 8)), 8, ' '));
$o = '';
foreach (explode(' ', $r) as $b)
$o .= chr(bindec(str_pad($b, 8, 0, STR_PAD_RIGHT)));
return $o;
}
}
interface IQRCodeProvider
{
public function getQRCodeImage($qrtext, $size);
public function getMimeType();
}
abstract class BaseHTTPQRCodeProvider implements IQRCodeProvider
{
protected $verifyssl;
protected function getContent($url)
{
$ch = curl_init();
curl_setopt_array($ch, array(
CURLOPT_URL => $url,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_MAXREDIRS => 3,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_CONNECTTIMEOUT => 10,
CURLOPT_DNS_CACHE_TIMEOUT => 10,
CURLOPT_TIMEOUT => 10,
CURLOPT_SSL_VERIFYPEER => $this->verifyssl,
CURLOPT_USERAGENT => 'TwoFactorAuth'
));
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
}
// https://developers.google.com/chart/infographics/docs/qr_codes
class GoogleQRCodeProvider extends BaseHTTPQRCodeProvider
{
public $errorcorrectionlevel;
public $margin;
function __construct($verifyssl = false, $errorcorrectionlevel = 'L', $margin = 1)
{
if (!is_bool($verifyssl))
throw new Exception('VerifySSL must be bool');
$this->verifyssl = $verifyssl;
$this->errorcorrectionlevel = $errorcorrectionlevel;
$this->margin = $margin;
}
public function getMimeType()
{
return 'image/png';
}
public function getQRCodeImage($qrtext, $size)
{
return $this->getContent($this->getUrl($qrtext, $size));
}
public function getUrl($qrtext, $size)
{
return 'https://chart.googleapis.com/chart?cht=qr'
. '&chs=' . $size . 'x' . $size
. '&chld=' . $this->errorcorrectionlevel . '|' . $this->margin
. '&chl=' . rawurlencode($qrtext);
}
}
// http://goqr.me/api/doc/create-qr-code/
class QRServerProvider extends BaseHTTPQRCodeProvider
{
public $errorcorrectionlevel;
public $margin;
public $qzone;
public $bgcolor;
public $color;
public $format;
function __construct($verifyssl = false, $errorcorrectionlevel = 'L', $margin = 4, $qzone = 1, $bgcolor = 'ffffff', $color = '000000', $format = 'png')
{
if (!is_bool($verifyssl))
throw new Exception('VerifySSL must be bool');
$this->verifyssl = $verifyssl;
$this->errorcorrectionlevel = $errorcorrectionlevel;
$this->margin = $margin;
$this->qzone = $qzone;
$this->bgcolor = $bgcolor;
$this->color = $color;
$this->format = $format;
}
public function getMimeType()
{
switch (strtolower($this->format))
{
case 'png':
return 'image/png';
case 'gif':
return 'image/gif';
case 'jpg':
case 'jpeg':
return 'image/jpeg';
case 'svg':
return 'image/svg+xml';
case 'eps':
return 'application/postscript';
}
}
public function getQRCodeImage($qrtext, $size)
{
return $this->getContent($this->getUrl($qrtext, $size));
}
private function decodeColor($value)
{
return vsprintf('%d-%d-%d', sscanf($value, "%02x%02x%02x"));
}
public function getUrl($qrtext, $size)
{
return 'https://api.qrserver.com/v1/create-qr-code/'
. '?size=' . $size . 'x' . $size
. '&ecc=' . strtoupper($this->errorcorrectionlevel)
. '&margin=' . $this->margin
. '&qzone=' . $this->qzone
. '&bgcolor=' . $this->decodeColor($this->bgcolor)
. '&color=' . $this->decodeColor($this->color)
. '&format=' . strtolower($this->format)
. '&data=' . rawurlencode($qrtext);
}
}
// http://qrickit.com/qrickit_apps/qrickit_api.php
class QRicketProvider extends BaseHTTPQRCodeProvider
{
public $errorcorrectionlevel;
public $margin;
public $qzone;
public $bgcolor;
public $color;
public $format;
function __construct($errorcorrectionlevel = 'L', $bgcolor = 'ffffff', $color = '000000', $format = 'p')
{
$this->verifyssl = false;
$this->errorcorrectionlevel = $errorcorrectionlevel;
$this->bgcolor = $bgcolor;
$this->color = $color;
$this->format = $format;
}
public function getMimeType()
{
switch (strtolower($this->format))
{
case 'p':
return 'image/png';
case 'g':
return 'image/gif';
case 'j':
return 'image/jpeg';
}
}
public function getQRCodeImage($qrtext, $size)
{
return $this->getContent($this->getUrl($qrtext, $size));
}
public function getUrl($qrtext, $size)
{
return 'http://qrickit.com/api/qr'
. '?qrsize=' . $size
. '&e=' . strtolower($this->errorcorrectionlevel)
. '&bgdcolor=' . $this->bgcolor
. '&fgdcolor=' . $this->color
. '&t=' . strtolower($this->format)
. '&d=' . rawurlencode($qrtext);
}
}