captcha.php ➔ generateToken() - Code Metrics - Inspection of "Merge pull request #591 from emkael/master" - pradosoft/prado - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 9aaf17...bab7fd )

by Fabio

created 2016-05-09 06:48 UTC

captcha.php ➔ generateToken() A

↳ Parent: Project

Complexity

Conditions	2
Paths	2

Size

Total Lines	5
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Metric	Value
cc	2
eloc	3
nc	2
nop	5
dl	0
loc	5
rs	9.4285

<?php
/**
 * CAPTCHA generator script.
 *
 * @author Qiang Xue <[email protected]>
 * @link https://github.com/pradosoft/prado
 * @copyright Copyright &copy; 2005-2016 The PRADO Group
 * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
 * @package System.Web.UI.WebControls.assets
 */

define('THEME_OPAQUE_BACKGROUND',0x0001);
define('THEME_NOISY_BACKGROUND',0x0002);
define('THEME_HAS_GRID',0x0004);
define('THEME_HAS_SCRIBBLE',0x0008);
define('THEME_MORPH_BACKGROUND',0x0010);
define('THEME_SHADOWED_TEXT',0x0020);

require_once(dirname(__FILE__).'/captcha_key.php');

$token='error';
$theme=0;

if(isset($_GET['options']))
{
	$str=base64_decode($_GET['options']);
	if(strlen($str)>32)
	{
		$hash=substr($str,0,32);
		$str=substr($str,32);
		if(md5($privateKey.$str)===$hash)
		{
			$options=unserialize($str);
			$publicKey=$options['publicKey'];
			$tokenLength=$options['tokenLength'];
			$caseSensitive=$options['caseSensitive'];
			$alphabet=$options['alphabet'];
			$fontSize=$options['fontSize'];
			$theme=$options['theme'];
			if(($randomSeed=$options['randomSeed'])>0)
				srand($randomSeed);
			else
				srand((int)(microtime()*1000000));
			$token=generateToken($publicKey,$privateKey,$alphabet,$tokenLength,$caseSensitive);
		}
	}
}

displayToken($token,$fontSize,$theme);

function generateToken($publicKey,$privateKey,$alphabet,$tokenLength,$caseSensitive)
{
	$token=substr(hash2string(md5($publicKey.$privateKey),$alphabet).hash2string(md5($privateKey.$publicKey),$alphabet),0,$tokenLength);
	return $caseSensitive?$token:strtoupper($token);
}

function hash2string($hex,$alphabet)
{
	if(strlen($alphabet)<2)
		$alphabet='234578adefhijmnrtABDEFGHJLMNRT';
	$hexLength=strlen($hex);
	$base=strlen($alphabet);
	$result='';
	for($i=0;$i<$hexLength;$i+=6)
	{
		$number=hexdec(substr($hex,$i,6));
		while($number)
		{
			$result.=$alphabet[$number%$base];
			$number=floor($number/$base);
		}
	}
	return $result;
}

function displayToken($token,$fontSize,$theme)
{
	if(($fontSize=(int)$fontSize)<22)
		$fontSize=22;
	if($fontSize>100)
		$fontSize=100;
	$length=strlen($token);
	$padding=10;
	$fontWidth=$fontSize;
	$fontHeight=floor($fontWidth*1.5);
	$width=$fontWidth*$length+$padding*2;
	$height=$fontHeight;
	$image=imagecreatetruecolor($width,$height);

	addBackground
	(
		$image, $width, $height,
		$theme&THEME_OPAQUE_BACKGROUND,
		$theme&THEME_NOISY_BACKGROUND,
		$theme&THEME_HAS_GRID,
		$theme&THEME_HAS_SCRIBBLE,
		$theme&THEME_MORPH_BACKGROUND
	);

	$font=dirname(__FILE__).DIRECTORY_SEPARATOR.'verase.ttf';

	if(function_exists('imagefilter'))
    	imagefilter($image,IMG_FILTER_GAUSSIAN_BLUR);

	$hasShadow=($theme&THEME_SHADOWED_TEXT);
    for($i=0;$i<$length;$i++)
	{
        $color=imagecolorallocate($image,rand(150,220),rand(150,220),rand(150,220));
        $size=rand($fontWidth-10,$fontWidth);
        $angle=rand(-30,30);
        $x=$padding+$i*$fontWidth;
        $y=rand($fontHeight-15,$fontHeight-10);
        imagettftext($image,$size,$angle,$x,$y,$color,$font,$token[$i]);
        if($hasShadow)
        	imagettftext($image,$size,$angle,$x+2,$y+2,$color,$font,$token[$i]);
        imagecolordeallocate($image,$color);
    }

	header('Content-Type: image/png');
	imagepng($image);
	imagedestroy($image);
}

function addBackground($image,$width,$height,$opaque,$noisy,$hasGrid,$hasScribble,$morph)
{
	$background=imagecreatetruecolor($width*2,$height*2);
	$white=imagecolorallocate($background,255,255,255);
	imagefill($background,0,0,$white);

	if($opaque)
		imagefill($background,0,0,imagecolorallocate($background,100,100,100));

	if($noisy)
		addNoise($background,$width*2,$height*2);

	if($hasGrid)
		addGrid($background,$width*2,$height*2);

	if($hasScribble)
		addScribble($background,$width*2,$height*2);

	if($morph)
		morphImage($background,$width*2,$height*2);

	imagecopy($image,$background,0,0,30,30,$width,$height);

	if(!$opaque)
		imagecolortransparent($image,$white);
}

function addNoise($image,$width,$height)
{
	for($x=0;$x<$width;++$x)
	{
		for($y=0;$y<$height;++$y)
		{
			if(rand(0,100)<25)
			{
				$color=imagecolorallocate($image,rand(150,220),rand(150,220),rand(150,220));
				imagesetpixel($image,$x,$y,$color);
	            imagecolordeallocate($image,$color);
	        }
		}
	}
}

function addGrid($image,$width,$height)
{
	for($i=0;$i<$width;$i+=rand(15,25))
	{
		imagesetthickness($image,rand(2,6));
		$color=imagecolorallocate($image,rand(100,180),rand(100,180),rand(100,180));
		imageline($image,$i+rand(-10,20),0,$i+rand(-10,20),$height,$color);
		imagecolordeallocate($image,$color);
	}
	for($i=0;$i<$height;$i+=rand(15,25))
	{
		imagesetthickness($image,rand(2,6));
		$color=imagecolorallocate($image,rand(100,180),rand(100,180),rand(100,180));
		imageline($image,0,$i+rand(-10,20),$width,$i+rand(-10,20),$color);
		imagecolordeallocate($image,$color);
	}
}

function addScribble($image,$width,$height)
{
	for($i=0;$i<8;$i++)
	{
		$color=imagecolorallocate($image,rand(100,180),rand(100,180),rand(100,180));
		$points=array();
		for($j=1;$j<rand(5,10);$j++)
		{
			$points[]=rand(2*(20*($i+1)),2*(50*($i+1)));
			$points[]=rand(30,$height+30);
		}
		imagesetthickness($image,rand(2,6));
		imagepolygon($image,$points,intval(sizeof($points)/2),$color);
		imagecolordeallocate($image,$color);
	}
}

function morphImage($image,$width,$height)
{
	$tempImage=imagecreatetruecolor($width,$height);
	$chunk=rand(1,5);
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
	for($x=$y=0;$x<$width;$x+=$chunk)
	{
		$chunk=rand(1,5);
		$y+=rand(-1,1);
		if($y>=$height)	$y=$height-5;
		if($y<0) $y=5;
		imagecopy($tempImage,$image,$x,0,$x,$y,$chunk,$height);
	}
	for($x=$y=0;$y<$height;$y+=$chunk)
	{
		$chunk=rand(1,5);
		$x+=rand(-1,1);
		if($x>=$width)	$x=$width-5;
		if($x<0) $x=5;
		imagecopy($image,$tempImage,$x,$y,0,$y,$width,$chunk);
	}
}



1			<?php
2			/**
3			* CAPTCHA generator script.
4			*
5			* @author Qiang Xue <[email protected]>
6			* @link https://github.com/pradosoft/prado
7			* @copyright Copyright © 2005-2016 The PRADO Group
8			* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
9			* @package System.Web.UI.WebControls.assets
10			*/
11
12			define('THEME_OPAQUE_BACKGROUND',0x0001);
13			define('THEME_NOISY_BACKGROUND',0x0002);
14			define('THEME_HAS_GRID',0x0004);
15			define('THEME_HAS_SCRIBBLE',0x0008);
16			define('THEME_MORPH_BACKGROUND',0x0010);
17			define('THEME_SHADOWED_TEXT',0x0020);
18
19			require_once(dirname(__FILE__).'/captcha_key.php');
20
21			$token='error';
22			$theme=0;
23
24			if(isset($_GET['options']))
25			{
26			$str=base64_decode($_GET['options']);
27			if(strlen($str)>32)
28			{
29			$hash=substr($str,0,32);
30			$str=substr($str,32);
31			if(md5($privateKey.$str)===$hash)
32			{
33			$options=unserialize($str);
34			$publicKey=$options['publicKey'];
35			$tokenLength=$options['tokenLength'];
36			$caseSensitive=$options['caseSensitive'];
37			$alphabet=$options['alphabet'];
38			$fontSize=$options['fontSize'];
39			$theme=$options['theme'];
40			if(($randomSeed=$options['randomSeed'])>0)
41			srand($randomSeed);
42			else
43			srand((int)(microtime()*1000000));
44			$token=generateToken($publicKey,$privateKey,$alphabet,$tokenLength,$caseSensitive);
45			}
46			}
47			}
48
49			displayToken($token,$fontSize,$theme);
50
51			function generateToken($publicKey,$privateKey,$alphabet,$tokenLength,$caseSensitive)
52			{
53			$token=substr(hash2string(md5($publicKey.$privateKey),$alphabet).hash2string(md5($privateKey.$publicKey),$alphabet),0,$tokenLength);
54			return $caseSensitive?$token:strtoupper($token);
55			}
56
57			function hash2string($hex,$alphabet)
58			{
59			if(strlen($alphabet)<2)
60			$alphabet='234578adefhijmnrtABDEFGHJLMNRT';
61			$hexLength=strlen($hex);
62			$base=strlen($alphabet);
63			$result='';
64			for($i=0;$i<$hexLength;$i+=6)
65			{
66			$number=hexdec(substr($hex,$i,6));
67			while($number)
68			{
69			$result.=$alphabet[$number%$base];
70			$number=floor($number/$base);
71			}
72			}
73			return $result;
74			}
75
76			function displayToken($token,$fontSize,$theme)
77			{
78			if(($fontSize=(int)$fontSize)<22)
79			$fontSize=22;
80			if($fontSize>100)
81			$fontSize=100;
82			$length=strlen($token);
83			$padding=10;
84			$fontWidth=$fontSize;
85			$fontHeight=floor($fontWidth*1.5);
86			$width=$fontWidth$length+$padding2;
87			$height=$fontHeight;
88			$image=imagecreatetruecolor($width,$height);
89
90			addBackground
91			(
92			$image, $width, $height,
93			$theme&THEME_OPAQUE_BACKGROUND,
94			$theme&THEME_NOISY_BACKGROUND,
95			$theme&THEME_HAS_GRID,
96			$theme&THEME_HAS_SCRIBBLE,
97			$theme&THEME_MORPH_BACKGROUND
98			);
99
100			$font=dirname(__FILE__).DIRECTORY_SEPARATOR.'verase.ttf';
101
102			if(function_exists('imagefilter'))
103			imagefilter($image,IMG_FILTER_GAUSSIAN_BLUR);
104
105			$hasShadow=($theme&THEME_SHADOWED_TEXT);
106			for($i=0;$i<$length;$i++)
107			{
108			$color=imagecolorallocate($image,rand(150,220),rand(150,220),rand(150,220));
109			$size=rand($fontWidth-10,$fontWidth);
110			$angle=rand(-30,30);
111			$x=$padding+$i*$fontWidth;
112			$y=rand($fontHeight-15,$fontHeight-10);
113			imagettftext($image,$size,$angle,$x,$y,$color,$font,$token[$i]);
114			if($hasShadow)
115			imagettftext($image,$size,$angle,$x+2,$y+2,$color,$font,$token[$i]);
116			imagecolordeallocate($image,$color);
117			}
118
119			header('Content-Type: image/png');
120			imagepng($image);
121			imagedestroy($image);
122			}
123
124			function addBackground($image,$width,$height,$opaque,$noisy,$hasGrid,$hasScribble,$morph)
125			{
126			$background=imagecreatetruecolor($width2,$height2);
127			$white=imagecolorallocate($background,255,255,255);
128			imagefill($background,0,0,$white);
129
130			if($opaque)
131			imagefill($background,0,0,imagecolorallocate($background,100,100,100));
132
133			if($noisy)
134			addNoise($background,$width2,$height2);
135
136			if($hasGrid)
137			addGrid($background,$width2,$height2);
138
139			if($hasScribble)
140			addScribble($background,$width2,$height2);
141
142			if($morph)
143			morphImage($background,$width2,$height2);
144
145			imagecopy($image,$background,0,0,30,30,$width,$height);
146
147			if(!$opaque)
148			imagecolortransparent($image,$white);
149			}
150
151			function addNoise($image,$width,$height)
152			{
153			for($x=0;$x<$width;++$x)
154			{
155			for($y=0;$y<$height;++$y)
156			{
157			if(rand(0,100)<25)
158			{
159			$color=imagecolorallocate($image,rand(150,220),rand(150,220),rand(150,220));
160			imagesetpixel($image,$x,$y,$color);
161			imagecolordeallocate($image,$color);
162			}
163			}
164			}
165			}
166
167			function addGrid($image,$width,$height)
168			{
169			for($i=0;$i<$width;$i+=rand(15,25))
170			{
171			imagesetthickness($image,rand(2,6));
172			$color=imagecolorallocate($image,rand(100,180),rand(100,180),rand(100,180));
173			imageline($image,$i+rand(-10,20),0,$i+rand(-10,20),$height,$color);
174			imagecolordeallocate($image,$color);
175			}
176			for($i=0;$i<$height;$i+=rand(15,25))
177			{
178			imagesetthickness($image,rand(2,6));
179			$color=imagecolorallocate($image,rand(100,180),rand(100,180),rand(100,180));
180			imageline($image,0,$i+rand(-10,20),$width,$i+rand(-10,20),$color);
181			imagecolordeallocate($image,$color);
182			}
183			}
184
185			function addScribble($image,$width,$height)
186			{
187			for($i=0;$i<8;$i++)
188			{
189			$color=imagecolorallocate($image,rand(100,180),rand(100,180),rand(100,180));
190			$points=array();
191			for($j=1;$j<rand(5,10);$j++)
192			{
193			$points[]=rand(2(20($i+1)),2(50($i+1)));
194			$points[]=rand(30,$height+30);
195			}
196			imagesetthickness($image,rand(2,6));
197			imagepolygon($image,$points,intval(sizeof($points)/2),$color);
198			imagecolordeallocate($image,$color);
199			}
200			}
201
202			function morphImage($image,$width,$height)
203			{
204			$tempImage=imagecreatetruecolor($width,$height);
205			$chunk=rand(1,5);
			0 ignored issues – show Unused Code introduced 2016-02-29 19:57 UTC by Report Bug Copy Issue Report `$chunk` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
206			for($x=$y=0;$x<$width;$x+=$chunk)
207			{
208			$chunk=rand(1,5);
209			$y+=rand(-1,1);
210			if($y>=$height) $y=$height-5;
211			if($y<0) $y=5;
212			imagecopy($tempImage,$image,$x,0,$x,$y,$chunk,$height);
213			}
214			for($x=$y=0;$y<$height;$y+=$chunk)
215			{
216			$chunk=rand(1,5);
217			$x+=rand(-1,1);
218			if($x>=$width) $x=$width-5;
219			if($x<0) $x=5;
220			imagecopy($image,$tempImage,$x,$y,0,$y,$width,$chunk);
221			}
222			}
223
224

pradosoft / prado

Push — master ( 9aaf17...bab7fd )

captcha.php ➔ generateToken() A

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