Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
| Total | |
98.59% |
70 / 71 |
|
85.71% |
6 / 7 |
CRAP | |
0.00% |
0 / 1 |
| Vizhash16x16 | |
98.59% |
70 / 71 |
|
85.71% |
6 / 7 |
19 | |
0.00% |
0 / 1 |
| __construct | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| generate | |
96.67% |
29 / 30 |
|
0.00% |
0 / 1 |
5 | |||
| getInt | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
1 | |||
| getX | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| getY | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| degrade | |
100.00% |
18 / 18 |
|
100.00% |
1 / 1 |
4 | |||
| drawshape | |
100.00% |
15 / 15 |
|
100.00% |
1 / 1 |
6 | |||
| 1 | <?php |
| 2 | /** |
| 3 | * VizHash_GD |
| 4 | * |
| 5 | * Visual Hash implementation in php4+GD, |
| 6 | * stripped down and modified version for PrivateBin |
| 7 | * |
| 8 | * @link https://sebsauvage.net/wiki/doku.php?id=php:vizhash_gd |
| 9 | * @copyright 2012 Sébastien SAUVAGE (sebsauvage.net) |
| 10 | * @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License |
| 11 | * @version 0.0.5 beta PrivateBin 1.7.0 |
| 12 | */ |
| 13 | |
| 14 | namespace PrivateBin; |
| 15 | |
| 16 | /** |
| 17 | * Vizhash16x16 |
| 18 | * |
| 19 | * Example: |
| 20 | * $vz = new Vizhash16x16(); |
| 21 | * $data = $vz->generate(sha512('hello')); |
| 22 | * header('Content-type: image/png'); |
| 23 | * echo $data; |
| 24 | * exit; |
| 25 | */ |
| 26 | class Vizhash16x16 |
| 27 | { |
| 28 | /** |
| 29 | * hash values |
| 30 | * |
| 31 | * @access private |
| 32 | * @var array |
| 33 | */ |
| 34 | private $VALUES; |
| 35 | |
| 36 | /** |
| 37 | * index of current value |
| 38 | * |
| 39 | * @access private |
| 40 | * @var int |
| 41 | */ |
| 42 | private $VALUES_INDEX; |
| 43 | |
| 44 | /** |
| 45 | * image width |
| 46 | * |
| 47 | * @access private |
| 48 | * @var int |
| 49 | */ |
| 50 | private $width; |
| 51 | |
| 52 | /** |
| 53 | * image height |
| 54 | * |
| 55 | * @access private |
| 56 | * @var int |
| 57 | */ |
| 58 | private $height; |
| 59 | |
| 60 | /** |
| 61 | * constructor |
| 62 | * |
| 63 | * @access public |
| 64 | */ |
| 65 | public function __construct() |
| 66 | { |
| 67 | $this->width = 16; |
| 68 | $this->height = 16; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Generate a 16x16 png corresponding to $text. |
| 73 | * |
| 74 | * The given text should to be 128 to 150 characters long |
| 75 | * |
| 76 | * @access public |
| 77 | * @param string $text |
| 78 | * @return string PNG data. Or empty string if GD is not available. |
| 79 | */ |
| 80 | public function generate($text) |
| 81 | { |
| 82 | if (!function_exists('gd_info')) { |
| 83 | return ''; |
| 84 | } |
| 85 | |
| 86 | $textlen = strlen($text); |
| 87 | |
| 88 | // We convert the hash into an array of integers. |
| 89 | $this->VALUES = array(); |
| 90 | for ($i = 0; $i < $textlen; $i = $i + 2) { |
| 91 | array_push($this->VALUES, hexdec(substr($text, $i, 2))); |
| 92 | } |
| 93 | $this->VALUES_INDEX = 0; // to walk the array. |
| 94 | |
| 95 | // Then use these integers to drive the creation of an image. |
| 96 | $image = imagecreatetruecolor($this->width, $this->height); |
| 97 | |
| 98 | $r = $r0 = $this->getInt(); |
| 99 | $g = $g0 = $this->getInt(); |
| 100 | $b = $b0 = $this->getInt(); |
| 101 | |
| 102 | // First, create an image with a specific gradient background. |
| 103 | $op = 'v'; |
| 104 | if (($this->getInt() % 2) == 0) { |
| 105 | $op = 'h'; |
| 106 | } |
| 107 | $image = $this->degrade($image, $op, array($r0, $g0, $b0), array(0, 0, 0)); |
| 108 | |
| 109 | for ($i = 0; $i < 7; ++$i) { |
| 110 | $action = $this->getInt(); |
| 111 | $color = imagecolorallocate($image, $r, $g, $b); |
| 112 | $r = $r0 = ($r0 + $this->getInt() / 25) % 256; |
| 113 | $g = $g0 = ($g0 + $this->getInt() / 25) % 256; |
| 114 | $b = $b0 = ($b0 + $this->getInt() / 25) % 256; |
| 115 | $this->drawshape($image, $action, $color); |
| 116 | } |
| 117 | |
| 118 | $color = imagecolorallocate($image, $this->getInt(), $this->getInt(), $this->getInt()); |
| 119 | $this->drawshape($image, $this->getInt(), $color); |
| 120 | ob_start(); |
| 121 | imagepng($image); |
| 122 | $imagedata = ob_get_contents(); |
| 123 | ob_end_clean(); |
| 124 | imagedestroy($image); |
| 125 | |
| 126 | return $imagedata; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Returns a single integer from the $VALUES array (0...255) |
| 131 | * |
| 132 | * @access private |
| 133 | * @return int |
| 134 | */ |
| 135 | private function getInt() |
| 136 | { |
| 137 | $v = $this->VALUES[$this->VALUES_INDEX]; |
| 138 | ++$this->VALUES_INDEX; |
| 139 | $this->VALUES_INDEX %= count($this->VALUES); // Warp around the array |
| 140 | return $v; |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Returns a single integer from the array (roughly mapped to image width) |
| 145 | * |
| 146 | * @access private |
| 147 | * @return int |
| 148 | */ |
| 149 | private function getX() |
| 150 | { |
| 151 | return $this->width * $this->getInt() / 256; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Returns a single integer from the array (roughly mapped to image height) |
| 156 | * |
| 157 | * @access private |
| 158 | * @return int |
| 159 | */ |
| 160 | private function getY() |
| 161 | { |
| 162 | return $this->height * $this->getInt() / 256; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Gradient function |
| 167 | * |
| 168 | * taken from: |
| 169 | * @link https://www.supportduweb.com/scripts_tutoriaux-code-source-41-gd-faire-un-degrade-en-php-gd-fonction-degrade-imagerie.html |
| 170 | * |
| 171 | * @access private |
| 172 | * @param resource $img |
| 173 | * @param string $direction |
| 174 | * @param array $color1 |
| 175 | * @param array $color2 |
| 176 | * @return resource |
| 177 | */ |
| 178 | private function degrade($img, $direction, $color1, $color2) |
| 179 | { |
| 180 | if ($direction == 'h') { |
| 181 | $size = imagesx($img); |
| 182 | $sizeinv = imagesy($img); |
| 183 | } else { |
| 184 | $size = imagesy($img); |
| 185 | $sizeinv = imagesx($img); |
| 186 | } |
| 187 | $diffs = array( |
| 188 | ($color2[0] - $color1[0]) / $size, |
| 189 | ($color2[1] - $color1[1]) / $size, |
| 190 | ($color2[2] - $color1[2]) / $size, |
| 191 | ); |
| 192 | for ($i = 0; $i < $size; ++$i) { |
| 193 | $r = $color1[0] + ($diffs[0] * $i); |
| 194 | $g = $color1[1] + ($diffs[1] * $i); |
| 195 | $b = $color1[2] + ($diffs[2] * $i); |
| 196 | if ($direction == 'h') { |
| 197 | imageline($img, $i, 0, $i, $sizeinv, imagecolorallocate($img, $r, $g, $b)); |
| 198 | } else { |
| 199 | imageline($img, 0, $i, $sizeinv, $i, imagecolorallocate($img, $r, $g, $b)); |
| 200 | } |
| 201 | } |
| 202 | return $img; |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Draw a shape |
| 207 | * |
| 208 | * @access private |
| 209 | * @param resource $image |
| 210 | * @param int $action |
| 211 | * @param int $color |
| 212 | */ |
| 213 | private function drawshape($image, $action, $color) |
| 214 | { |
| 215 | switch ($action % 7) { |
| 216 | case 0: |
| 217 | imagefilledrectangle($image, $this->getX(), $this->getY(), $this->getX(), $this->getY(), $color); |
| 218 | break; |
| 219 | case 1: |
| 220 | case 2: |
| 221 | imagefilledellipse($image, $this->getX(), $this->getY(), $this->getX(), $this->getY(), $color); |
| 222 | break; |
| 223 | case 3: |
| 224 | $points = array($this->getX(), $this->getY(), $this->getX(), $this->getY(), $this->getX(), $this->getY(), $this->getX(), $this->getY()); |
| 225 | imagefilledpolygon($image, $points, 4, $color); |
| 226 | break; |
| 227 | default: |
| 228 | $start = $this->getInt() * 360 / 256; |
| 229 | $end = $start + $this->getInt() * 180 / 256; |
| 230 | imagefilledarc($image, $this->getX(), $this->getY(), $this->getX(), $this->getY(), $start, $end, $color, IMG_ARC_PIE); |
| 231 | } |
| 232 | } |
| 233 | } |