implemented Identicon library as new default for comment icons, made Vizhash an optional alternative, refactored Vizhash and removed string lenghtening
This commit is contained in:
El RIDO
parent
461aed8573
commit
3988b860b0
8 changed files with 162 additions and 87 deletions
|
|
@ -5,7 +5,7 @@
|
|||
* ADDED: re-introduced URL shortener support (optional), which was removed back in version 0.16 for privacy concerns
|
||||
* ADDED: Preview tab, helpful for writing markdown code or check source code rendering
|
||||
* ADDED: Automatic purging of expired pastes, done on paste creation
|
||||
* ADDED: Option to disable vizhashs in discussions (will only affect newly created pastes)
|
||||
* ADDED: Option to disable icons in discussions (will only affect newly created pastes)
|
||||
* ADDED: Composer support
|
||||
* CHANGED: Renamed the ZeroBin fork to PrivateBin
|
||||
* CHANGED: Removed unmaintained RainTPL template engine, replacing the templates with straight forward PHP files
|
||||
|
|
@ -14,7 +14,9 @@
|
|||
* CHANGED: Switched to GCM instead CCM mode for AES encryption for newly created pastes
|
||||
* CHANGED: Switched to a SHA256 HMAC of the IP in traffic limiter instead of storing it in plain text on the server
|
||||
* CHANGED: Introduced content security policy header to reduce cross site scripting (XSS) risks
|
||||
* CHANGED: Refactored PHP code to conform to PSR-4 and PSR-2 standards.
|
||||
* CHANGED: Refactored PHP code to conform to PSR-4 and PSR-2 standards
|
||||
* CHANGED: Switched to Identicons as the default for comments with nicknames
|
||||
* CHANGED: Vizhash is now optional and based on (128 byte) SHA512 HMAC instead of (144 bytes) combination of MD5, SHA1 and a reversal of that string
|
||||
* FIXED: Content-type negociation for HTML in certain uncommon browser configurations
|
||||
* FIXED: JavaScript error displayed before page is loaded or during attachment load
|
||||
* FIXED: Don't strip space characters at beginning or end of optional password
|
||||
|
|
|
|||
|
|
@ -53,18 +53,19 @@ languageselection = false
|
|||
; the pastes encryption key
|
||||
; urlshortener = "https://shortener.example.com/api?link="
|
||||
|
||||
; (optional) vizhash is a weak mechanism to detect if a comment was from a
|
||||
; different user when the same username was used in a comment. It is based on
|
||||
; the IP and might be used to get the posters IP if the server salt is leaked
|
||||
; and a rainbow table is generated for all IPs. Enabled by default.
|
||||
; vizhash = false
|
||||
; (optional) IP based icons are a weak mechanism to detect if a comment was from
|
||||
; a different user when the same username was used in a comment. It might be
|
||||
; used to get the IP of a non anonymous comment poster if the server salt is
|
||||
; leaked and a SHA256 HMAC rainbow table is generated for all (relevant) IPs.
|
||||
; Can be set to one these values: none / vizhash / identicon (default).
|
||||
; icon = none
|
||||
|
||||
; Content Security Policy headers allow a website to restrict what sources are
|
||||
; allowed to be accessed in its context. You need to change this if you added
|
||||
; custom scripts from third-party domains to your templates, e.g. tracking
|
||||
; scripts or run your site behind certain DDoS-protection services.
|
||||
; Check the documentation at https://content-security-policy.com/
|
||||
cspheader = "default-src 'none'; connect-src *; script-src 'self'; style-src 'self'; font-src 'self'; img-src 'self';"
|
||||
cspheader = "default-src 'none'; connect-src *; script-src 'self'; style-src 'self'; font-src 'self'; img-src 'self' data:;"
|
||||
|
||||
; stay compatible with PrivateBin Alpha 0.19, less secure
|
||||
; if enabled will use base64.js version 1.7 instead of 2.1.9 and sha1 instead of
|
||||
|
|
|
|||
|
|
@ -50,8 +50,8 @@ class Configuration
|
|||
'languageselection' => false,
|
||||
'languagedefault' => '',
|
||||
'urlshortener' => '',
|
||||
'vizhash' => true,
|
||||
'cspheader' => 'default-src \'none\'; connect-src *; script-src \'self\'; style-src \'self\'; font-src \'self\'; img-src \'self\';',
|
||||
'icon' => 'identicon',
|
||||
'cspheader' => 'default-src \'none\'; connect-src *; script-src \'self\'; style-src \'self\'; font-src \'self\'; img-src \'self\' data:;',
|
||||
'zerobincompatibility' => false,
|
||||
),
|
||||
'expire' => array(
|
||||
|
|
|
|||
|
|
@ -15,6 +15,7 @@ namespace PrivateBin\Model;
|
|||
use PrivateBin\Sjcl;
|
||||
use PrivateBin\Persistence\TrafficLimiter;
|
||||
use PrivateBin\Vizhash16x16;
|
||||
use Identicon\Identicon;
|
||||
use Exception;
|
||||
|
||||
/**
|
||||
|
|
@ -192,17 +193,26 @@ class Comment extends AbstractModel
|
|||
}
|
||||
$this->_data->meta->nickname = $nickname;
|
||||
|
||||
if ($this->_conf->getKey('vizhash')) {
|
||||
// Generation of the anonymous avatar (Vizhash):
|
||||
// If a nickname is provided, we generate a Vizhash.
|
||||
// (We assume that if the user did not enter a nickname, he/she wants
|
||||
// to be anonymous and we will not generate the vizhash.)
|
||||
// If a nickname is provided, we generate an icon based on a SHA512 HMAC
|
||||
// of the users IP. (We assume that if the user did not enter a nickname,
|
||||
// the user wants to be anonymous and we will not generate an icon.)
|
||||
$icon = $this->_conf->getKey('icon');
|
||||
if ($icon != 'none') {
|
||||
$pngdata = '';
|
||||
$hmac = TrafficLimiter::getHash();
|
||||
if ($icon == 'identicon') {
|
||||
$identicon = new Identicon();
|
||||
$pngdata = $identicon->getImageDataUri($hmac, 16);
|
||||
} elseif ($icon == 'vizhash') {
|
||||
$vh = new Vizhash16x16();
|
||||
$pngdata = $vh->generate(TrafficLimiter::getIp());
|
||||
$pngdata = 'data:image/png;base64,' . base64_encode(
|
||||
$vh->generate($hmac)
|
||||
);
|
||||
}
|
||||
if ($pngdata != '') {
|
||||
$this->_data->meta->vizhash = 'data:image/png;base64,' . base64_encode($pngdata);
|
||||
$this->_data->meta->vizhash = $pngdata;
|
||||
}
|
||||
// Once the avatar is generated, we do not keep the IP address, nor its hash.
|
||||
}
|
||||
// Once the icon is generated, we do not keep the IP address hash.
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -73,15 +73,16 @@ class TrafficLimiter extends AbstractPersistence
|
|||
}
|
||||
|
||||
/**
|
||||
* get the current visitors IP address
|
||||
* get a HMAC of the current visitors IP address
|
||||
*
|
||||
* @access public
|
||||
* @static
|
||||
* @param string $algo
|
||||
* @return string
|
||||
*/
|
||||
public static function getIp()
|
||||
public static function getHash($algo = 'sha512')
|
||||
{
|
||||
return $_SERVER[self::$_ipKey];
|
||||
return hash_hmac($algo, $_SERVER[self::$_ipKey], ServerSalt::get());
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -101,8 +102,6 @@ class TrafficLimiter extends AbstractPersistence
|
|||
return true;
|
||||
}
|
||||
|
||||
$ip = hash_hmac('sha256', self::getIp(), ServerSalt::get());
|
||||
|
||||
$file = 'traffic_limiter.php';
|
||||
if (!self::_exists($file)) {
|
||||
self::_store(
|
||||
|
|
@ -117,17 +116,19 @@ class TrafficLimiter extends AbstractPersistence
|
|||
$now = time();
|
||||
$tl = $GLOBALS['traffic_limiter'];
|
||||
|
||||
// purge file of expired IPs to keep it small
|
||||
// purge file of expired hashes to keep it small
|
||||
foreach ($tl as $key => $time) {
|
||||
if ($time + self::$_limit < $now) {
|
||||
unset($tl[$key]);
|
||||
}
|
||||
}
|
||||
|
||||
if (array_key_exists($ip, $tl) && ($tl[$ip] + self::$_limit >= $now)) {
|
||||
// this hash is used as an array key, hence a shorter hash is used
|
||||
$hash = self::getHash('sha256');
|
||||
if (array_key_exists($hash, $tl) && ($tl[$hash] + self::$_limit >= $now)) {
|
||||
$result = false;
|
||||
} else {
|
||||
$tl[$ip] = time();
|
||||
$tl[$hash] = time();
|
||||
$result = true;
|
||||
}
|
||||
self::_store(
|
||||
|
|
|
|||
|
|
@ -13,8 +13,6 @@
|
|||
|
||||
namespace PrivateBin;
|
||||
|
||||
use PrivateBin\Persistence\ServerSalt;
|
||||
|
||||
/**
|
||||
* Vizhash16x16
|
||||
*
|
||||
|
|
@ -60,14 +58,6 @@ class Vizhash16x16
|
|||
*/
|
||||
private $height;
|
||||
|
||||
/**
|
||||
* salt used when generating the image
|
||||
*
|
||||
* @access private
|
||||
* @var string
|
||||
*/
|
||||
private $salt;
|
||||
|
||||
/**
|
||||
* constructor
|
||||
*
|
||||
|
|
@ -78,12 +68,13 @@ class Vizhash16x16
|
|||
{
|
||||
$this->width = 16;
|
||||
$this->height = 16;
|
||||
$this->salt = ServerSalt::get();
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate a 16x16 png corresponding to $text.
|
||||
*
|
||||
* The given text should to be 128 to 150 characters long
|
||||
*
|
||||
* @access public
|
||||
* @param string $text
|
||||
* @return string PNG data. Or empty string if GD is not available.
|
||||
|
|
@ -94,44 +85,35 @@ class Vizhash16x16
|
|||
return '';
|
||||
}
|
||||
|
||||
// We hash the input string.
|
||||
$hash=hash('sha1', $text.$this->salt).hash('md5', $text.$this->salt);
|
||||
$hash=$hash.strrev($hash); # more data to make graphics
|
||||
$hashlen=strlen($hash);
|
||||
$textlen=strlen($text);
|
||||
|
||||
// We convert the hash into an array of integers.
|
||||
$this->VALUES=array();
|
||||
for ($i=0; $i<$hashlen; $i=$i+2) {
|
||||
array_push($this->VALUES, hexdec(substr($hash, $i, 2)));
|
||||
$this->VALUES = array();
|
||||
for ($i = 0; $i < $textlen; $i = $i + 2) {
|
||||
array_push($this->VALUES, hexdec(substr($text, $i, 2)));
|
||||
}
|
||||
$this->VALUES_INDEX=0; // to walk the array.
|
||||
$this->VALUES_INDEX = 0; // to walk the array.
|
||||
|
||||
// Then use these integers to drive the creation of an image.
|
||||
$image = imagecreatetruecolor($this->width, $this->height);
|
||||
|
||||
$r0 = $this->getInt();
|
||||
$r=$r0;
|
||||
$g0 = $this->getInt();
|
||||
$g=$g0;
|
||||
$b0 = $this->getInt();
|
||||
$b=$b0;
|
||||
$r = $r0 = $this->getInt();
|
||||
$g = $g0 = $this->getInt();
|
||||
$b = $b0 = $this->getInt();
|
||||
|
||||
// First, create an image with a specific gradient background.
|
||||
$op='v';
|
||||
if (($this->getInt()%2)==0) {
|
||||
$op='h';
|
||||
$op = 'v';
|
||||
if (($this->getInt() % 2) == 0) {
|
||||
$op = 'h';
|
||||
};
|
||||
$image = $this->degrade($image, $op, array($r0, $g0, $b0), array(0, 0, 0));
|
||||
|
||||
for ($i=0; $i<7; $i=$i+1) {
|
||||
$action=$this->getInt();
|
||||
for ($i = 0; $i < 7; ++$i) {
|
||||
$action = $this->getInt();
|
||||
$color = imagecolorallocate($image, $r, $g, $b);
|
||||
$r = ($r0 + $this->getInt()/25)%256;
|
||||
$g = ($g0 + $this->getInt()/25)%256;
|
||||
$b = ($b0 + $this->getInt()/25)%256;
|
||||
$r0=$r;
|
||||
$g0=$g;
|
||||
$b0=$b;
|
||||
$r = $r0 = ($r0 + $this->getInt() / 25) % 256;
|
||||
$g = $g0 = ($g0 + $this->getInt() / 25) % 256;
|
||||
$b = $b0 = ($b0 + $this->getInt() / 25) % 256;
|
||||
$this->drawshape($image, $action, $color);
|
||||
}
|
||||
|
||||
|
|
@ -154,8 +136,8 @@ class Vizhash16x16
|
|||
*/
|
||||
private function getInt()
|
||||
{
|
||||
$v= $this->VALUES[$this->VALUES_INDEX];
|
||||
$this->VALUES_INDEX++;
|
||||
$v = $this->VALUES[$this->VALUES_INDEX];
|
||||
++$this->VALUES_INDEX;
|
||||
$this->VALUES_INDEX %= count($this->VALUES); // Warp around the array
|
||||
return $v;
|
||||
}
|
||||
|
|
@ -168,7 +150,7 @@ class Vizhash16x16
|
|||
*/
|
||||
private function getX()
|
||||
{
|
||||
return $this->width*$this->getInt()/256;
|
||||
return $this->width * $this->getInt() / 256;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -179,7 +161,7 @@ class Vizhash16x16
|
|||
*/
|
||||
private function getY()
|
||||
{
|
||||
return $this->height*$this->getInt()/256;
|
||||
return $this->height * $this->getInt() / 256;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -197,7 +179,7 @@ class Vizhash16x16
|
|||
*/
|
||||
private function degrade($img, $direction, $color1, $color2)
|
||||
{
|
||||
if ($direction=='h') {
|
||||
if ($direction == 'h') {
|
||||
$size = imagesx($img);
|
||||
$sizeinv = imagesy($img);
|
||||
} else {
|
||||
|
|
@ -205,15 +187,15 @@ class Vizhash16x16
|
|||
$sizeinv = imagesx($img);
|
||||
}
|
||||
$diffs = array(
|
||||
(($color2[0]-$color1[0])/$size),
|
||||
(($color2[1]-$color1[1])/$size),
|
||||
(($color2[2]-$color1[2])/$size)
|
||||
(($color2[0] - $color1[0]) / $size),
|
||||
(($color2[1] - $color1[1]) / $size),
|
||||
(($color2[2] - $color1[2]) / $size)
|
||||
);
|
||||
for ($i=0;$i<$size;$i++) {
|
||||
$r = $color1[0]+($diffs[0]*$i);
|
||||
$g = $color1[1]+($diffs[1]*$i);
|
||||
$b = $color1[2]+($diffs[2]*$i);
|
||||
if ($direction=='h') {
|
||||
for ($i = 0; $i < $size; ++$i) {
|
||||
$r = $color1[0] + ($diffs[0] * $i);
|
||||
$g = $color1[1] + ($diffs[1] * $i);
|
||||
$b = $color1[2] + ($diffs[2] * $i);
|
||||
if ($direction == 'h') {
|
||||
imageline($img, $i, 0, $i, $sizeinv, imagecolorallocate($img, $r, $g, $b));
|
||||
} else {
|
||||
imageline($img, 0, $i, $sizeinv, $i, imagecolorallocate($img, $r, $g, $b));
|
||||
|
|
@ -233,7 +215,7 @@ class Vizhash16x16
|
|||
*/
|
||||
private function drawshape($image, $action, $color)
|
||||
{
|
||||
switch ($action%7) {
|
||||
switch ($action % 7) {
|
||||
case 0:
|
||||
ImageFilledRectangle($image, $this->getX(), $this->getY(), $this->getX(), $this->getY(), $color);
|
||||
break;
|
||||
|
|
@ -246,7 +228,8 @@ class Vizhash16x16
|
|||
ImageFilledPolygon($image, $points, 4, $color);
|
||||
break;
|
||||
default:
|
||||
$start=$this->getInt()*360/256; $end=$start+$this->getInt()*180/256;
|
||||
$start = $this->getInt() * 360 /256;
|
||||
$end = $start + $this->getInt() * 180 / 256;
|
||||
ImageFilledArc($image, $this->getX(), $this->getY(), $this->getX(), $this->getY(), $start, $end, $color, IMG_ARC_PIE);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -5,7 +5,9 @@ use PrivateBin\Data\Database;
|
|||
use PrivateBin\Model;
|
||||
use PrivateBin\Model\Paste;
|
||||
use PrivateBin\Persistence\ServerSalt;
|
||||
use PrivateBin\Persistence\TrafficLimiter;
|
||||
use PrivateBin\Vizhash16x16;
|
||||
use Identicon\Identicon;
|
||||
|
||||
class ModelTest extends PHPUnit_Framework_TestCase
|
||||
{
|
||||
|
|
@ -167,13 +169,13 @@ class ModelTest extends PHPUnit_Framework_TestCase
|
|||
$paste->setOpendiscussion();
|
||||
$paste->store();
|
||||
|
||||
$vz = new Vizhash16x16();
|
||||
$pngdata = 'data:image/png;base64,' . base64_encode($vz->generate($_SERVER['REMOTE_ADDR']));
|
||||
$comment = $paste->getComment(Helper::getPasteId());
|
||||
$comment->setData($commentData['data']);
|
||||
$comment->setNickname($commentData['meta']['nickname']);
|
||||
$comment->store();
|
||||
|
||||
$identicon = new Identicon();
|
||||
$pngdata = $identicon->getImageDataUri(TrafficLimiter::getHash(), 16);
|
||||
$comment = $paste->getComment(Helper::getPasteId(), Helper::getCommentId())->get();
|
||||
$this->assertEquals($pngdata, $comment->meta->vizhash, 'nickname triggers vizhash to be set');
|
||||
}
|
||||
|
|
@ -260,9 +262,9 @@ class ModelTest extends PHPUnit_Framework_TestCase
|
|||
public function testCommentWithDisabledVizhash()
|
||||
{
|
||||
$options = parse_ini_file(CONF, true);
|
||||
$options['main']['vizhash'] = false;
|
||||
$options['main']['icon'] = 'none';
|
||||
$options['model'] = array(
|
||||
'class' => 'privatebin_db',
|
||||
'class' => 'Database',
|
||||
);
|
||||
$options['model_options'] = array(
|
||||
'dsn' => 'sqlite::memory:',
|
||||
|
|
@ -311,4 +313,80 @@ class ModelTest extends PHPUnit_Framework_TestCase
|
|||
$this->assertEquals($commentData['meta']['nickname'], $comment->meta->nickname);
|
||||
$this->assertFalse(property_exists($comment->meta, 'vizhash'), 'vizhash was not generated');
|
||||
}
|
||||
|
||||
public function testCommentIdenticon()
|
||||
{
|
||||
$options = parse_ini_file(CONF, true);
|
||||
$options['main']['icon'] = 'identicon';
|
||||
$options['model'] = array(
|
||||
'class' => 'Database',
|
||||
);
|
||||
$options['model_options'] = array(
|
||||
'dsn' => 'sqlite::memory:',
|
||||
'usr' => null,
|
||||
'pwd' => null,
|
||||
'opt' => array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION),
|
||||
);
|
||||
Helper::confBackup();
|
||||
Helper::createIniFile(CONF, $options);
|
||||
$model = new Model(new Configuration);
|
||||
|
||||
$pasteData = Helper::getPaste();
|
||||
$commentData = Helper::getComment();
|
||||
$model->getPaste(Helper::getPasteId())->delete();
|
||||
|
||||
$paste = $model->getPaste();
|
||||
$paste->setData($pasteData['data']);
|
||||
$paste->setOpendiscussion();
|
||||
$paste->setFormatter($pasteData['meta']['formatter']);
|
||||
$paste->store();
|
||||
|
||||
$comment = $paste->getComment(Helper::getPasteId());
|
||||
$comment->setData($commentData['data']);
|
||||
$comment->setNickname($commentData['meta']['nickname']);
|
||||
$comment->store();
|
||||
|
||||
$identicon = new Identicon();
|
||||
$pngdata = $identicon->getImageDataUri(TrafficLimiter::getHash(), 16);
|
||||
$comment = $paste->getComment(Helper::getPasteId(), Helper::getCommentId())->get();
|
||||
$this->assertEquals($pngdata, $comment->meta->vizhash, 'nickname triggers vizhash to be set');
|
||||
}
|
||||
|
||||
public function testCommentVizhash()
|
||||
{
|
||||
$options = parse_ini_file(CONF, true);
|
||||
$options['main']['icon'] = 'vizhash';
|
||||
$options['model'] = array(
|
||||
'class' => 'Database',
|
||||
);
|
||||
$options['model_options'] = array(
|
||||
'dsn' => 'sqlite::memory:',
|
||||
'usr' => null,
|
||||
'pwd' => null,
|
||||
'opt' => array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION),
|
||||
);
|
||||
Helper::confBackup();
|
||||
Helper::createIniFile(CONF, $options);
|
||||
$model = new Model(new Configuration);
|
||||
|
||||
$pasteData = Helper::getPaste();
|
||||
$commentData = Helper::getComment();
|
||||
$model->getPaste(Helper::getPasteId())->delete();
|
||||
|
||||
$paste = $model->getPaste();
|
||||
$paste->setData($pasteData['data']);
|
||||
$paste->setOpendiscussion();
|
||||
$paste->setFormatter($pasteData['meta']['formatter']);
|
||||
$paste->store();
|
||||
|
||||
$comment = $paste->getComment(Helper::getPasteId());
|
||||
$comment->setData($commentData['data']);
|
||||
$comment->setNickname($commentData['meta']['nickname']);
|
||||
$comment->store();
|
||||
|
||||
$vz = new Vizhash16x16();
|
||||
$pngdata = 'data:image/png;base64,' . base64_encode($vz->generate(TrafficLimiter::getHash()));
|
||||
$comment = $paste->getComment(Helper::getPasteId(), Helper::getCommentId())->get();
|
||||
$this->assertEquals($pngdata, $comment->meta->vizhash, 'nickname triggers vizhash to be set');
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -30,11 +30,11 @@ class Vizhash16x16Test extends PHPUnit_Framework_TestCase
|
|||
public function testVizhashGeneratesUniquePngsPerIp()
|
||||
{
|
||||
$vz = new Vizhash16x16();
|
||||
$pngdata = $vz->generate('127.0.0.1');
|
||||
$pngdata = $vz->generate(hash('sha512', '127.0.0.1'));
|
||||
file_put_contents($this->_file, $pngdata);
|
||||
$finfo = new finfo(FILEINFO_MIME_TYPE);
|
||||
$this->assertEquals('image/png', $finfo->file($this->_file));
|
||||
$this->assertNotEquals($pngdata, $vz->generate('2001:1620:2057:dead:beef::cafe:babe'));
|
||||
$this->assertEquals($pngdata, $vz->generate('127.0.0.1'));
|
||||
$this->assertNotEquals($pngdata, $vz->generate(hash('sha512', '2001:1620:2057:dead:beef::cafe:babe')));
|
||||
$this->assertEquals($pngdata, $vz->generate(hash('sha512', '127.0.0.1')));
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue