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-rw-r--r--vendor/gregwar/captcha/CaptchaBuilder.php720
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diff --git a/vendor/gregwar/captcha/CaptchaBuilder.php b/vendor/gregwar/captcha/CaptchaBuilder.php
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+++ b/vendor/gregwar/captcha/CaptchaBuilder.php
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+<?php
+
+namespace Gregwar\Captcha;
+
+use \Exception;
+
+/**
+ * Builds a new captcha image
+ * Uses the fingerprint parameter, if one is passed, to generate the same image
+ *
+ * @author Gregwar <g.passault@gmail.com>
+ * @author Jeremy Livingston <jeremy.j.livingston@gmail.com>
+ */
+class CaptchaBuilder implements CaptchaBuilderInterface
+{
+ /**
+ * @var array
+ */
+ protected $fingerprint = array();
+
+ /**
+ * @var bool
+ */
+ protected $useFingerprint = false;
+
+ /**
+ * @var array
+ */
+ protected $textColor = null;
+
+ /**
+ * @var array
+ */
+ protected $backgroundColor = null;
+
+ /**
+ * @var array
+ */
+ protected $backgroundImages = array();
+
+ /**
+ * @var resource
+ */
+ protected $contents = null;
+
+ /**
+ * @var string
+ */
+ protected $phrase = null;
+
+ /**
+ * @var PhraseBuilderInterface
+ */
+ protected $builder;
+
+ /**
+ * @var bool
+ */
+ protected $distortion = true;
+
+ /**
+ * The maximum number of lines to draw in front of
+ * the image. null - use default algorithm
+ */
+ protected $maxFrontLines = null;
+
+ /**
+ * The maximum number of lines to draw behind
+ * the image. null - use default algorithm
+ */
+ protected $maxBehindLines = null;
+
+ /**
+ * The maximum angle of char
+ */
+ protected $maxAngle = 8;
+
+ /**
+ * The maximum offset of char
+ */
+ protected $maxOffset = 5;
+
+ /**
+ * Is the interpolation enabled ?
+ *
+ * @var bool
+ */
+ protected $interpolation = true;
+
+ /**
+ * Ignore all effects
+ *
+ * @var bool
+ */
+ protected $ignoreAllEffects = false;
+
+ /**
+ * Allowed image types for the background images
+ *
+ * @var array
+ */
+ protected $allowedBackgroundImageTypes = array('image/png', 'image/jpeg', 'image/gif');
+
+ /**
+ * The image contents
+ */
+ public function getContents()
+ {
+ return $this->contents;
+ }
+
+ /**
+ * Enable/Disables the interpolation
+ *
+ * @param $interpolate bool True to enable, false to disable
+ *
+ * @return CaptchaBuilder
+ */
+ public function setInterpolation($interpolate = true)
+ {
+ $this->interpolation = $interpolate;
+
+ return $this;
+ }
+
+ /**
+ * Temporary dir, for OCR check
+ */
+ public $tempDir = 'temp/';
+
+ public function __construct($phrase = null, PhraseBuilderInterface $builder = null)
+ {
+ if ($builder === null) {
+ $this->builder = new PhraseBuilder;
+ } else {
+ $this->builder = $builder;
+ }
+
+ if ($phrase === null) {
+ $phrase = $this->builder->build();
+ }
+
+ $this->phrase = $phrase;
+ }
+
+ /**
+ * Setting the phrase
+ */
+ public function setPhrase($phrase)
+ {
+ $this->phrase = (string) $phrase;
+ }
+
+ /**
+ * Enables/disable distortion
+ */
+ public function setDistortion($distortion)
+ {
+ $this->distortion = (bool) $distortion;
+
+ return $this;
+ }
+
+ public function setMaxBehindLines($maxBehindLines)
+ {
+ $this->maxBehindLines = $maxBehindLines;
+
+ return $this;
+ }
+
+ public function setMaxFrontLines($maxFrontLines)
+ {
+ $this->maxFrontLines = $maxFrontLines;
+
+ return $this;
+ }
+
+ public function setMaxAngle($maxAngle)
+ {
+ $this->maxAngle = $maxAngle;
+
+ return $this;
+ }
+
+ public function setMaxOffset($maxOffset)
+ {
+ $this->maxOffset = $maxOffset;
+
+ return $this;
+ }
+
+ /**
+ * Gets the captcha phrase
+ */
+ public function getPhrase()
+ {
+ return $this->phrase;
+ }
+
+ /**
+ * Returns true if the given phrase is good
+ */
+ public function testPhrase($phrase)
+ {
+ return ($this->builder->niceize($phrase) == $this->builder->niceize($this->getPhrase()));
+ }
+
+ /**
+ * Instantiation
+ */
+ public static function create($phrase = null)
+ {
+ return new self($phrase);
+ }
+
+ /**
+ * Sets the text color to use
+ */
+ public function setTextColor($r, $g, $b)
+ {
+ $this->textColor = array($r, $g, $b);
+
+ return $this;
+ }
+
+ /**
+ * Sets the background color to use
+ */
+ public function setBackgroundColor($r, $g, $b)
+ {
+ $this->backgroundColor = array($r, $g, $b);
+
+ return $this;
+ }
+
+ /**
+ * Sets the ignoreAllEffects value
+ *
+ * @param bool $ignoreAllEffects
+ * @return CaptchaBuilder
+ */
+ public function setIgnoreAllEffects($ignoreAllEffects)
+ {
+ $this->ignoreAllEffects = $ignoreAllEffects;
+
+ return $this;
+ }
+
+ /**
+ * Sets the list of background images to use (one image is randomly selected)
+ */
+ public function setBackgroundImages(array $backgroundImages)
+ {
+ $this->backgroundImages = $backgroundImages;
+
+ return $this;
+ }
+
+ /**
+ * Draw lines over the image
+ */
+ protected function drawLine($image, $width, $height, $tcol = null)
+ {
+ if ($tcol === null) {
+ $tcol = imagecolorallocate($image, $this->rand(100, 255), $this->rand(100, 255), $this->rand(100, 255));
+ }
+
+ if ($this->rand(0, 1)) { // Horizontal
+ $Xa = $this->rand(0, $width/2);
+ $Ya = $this->rand(0, $height);
+ $Xb = $this->rand($width/2, $width);
+ $Yb = $this->rand(0, $height);
+ } else { // Vertical
+ $Xa = $this->rand(0, $width);
+ $Ya = $this->rand(0, $height/2);
+ $Xb = $this->rand(0, $width);
+ $Yb = $this->rand($height/2, $height);
+ }
+ imagesetthickness($image, $this->rand(1, 3));
+ imageline($image, $Xa, $Ya, $Xb, $Yb, $tcol);
+ }
+
+ /**
+ * Apply some post effects
+ */
+ protected function postEffect($image)
+ {
+ if (!function_exists('imagefilter')) {
+ return;
+ }
+
+ if ($this->backgroundColor != null || $this->textColor != null) {
+ return;
+ }
+
+ // Negate ?
+ if ($this->rand(0, 1) == 0) {
+ imagefilter($image, IMG_FILTER_NEGATE);
+ }
+
+ // Edge ?
+ if ($this->rand(0, 10) == 0) {
+ imagefilter($image, IMG_FILTER_EDGEDETECT);
+ }
+
+ // Contrast
+ imagefilter($image, IMG_FILTER_CONTRAST, $this->rand(-50, 10));
+
+ // Colorize
+ if ($this->rand(0, 5) == 0) {
+ imagefilter($image, IMG_FILTER_COLORIZE, $this->rand(-80, 50), $this->rand(-80, 50), $this->rand(-80, 50));
+ }
+ }
+
+ /**
+ * Writes the phrase on the image
+ */
+ protected function writePhrase($image, $phrase, $font, $width, $height)
+ {
+ $length = strlen($phrase);
+ if ($length === 0) {
+ return imagecolorallocate($image, 0, 0, 0);
+ }
+
+ // Gets the text size and start position
+ $size = $width / $length - $this->rand(0, 3) - 1;
+ $box = imagettfbbox($size, 0, $font, $phrase);
+ $textWidth = $box[2] - $box[0];
+ $textHeight = $box[1] - $box[7];
+ $x = ($width - $textWidth) / 2;
+ $y = ($height - $textHeight) / 2 + $size;
+
+ if (!count($this->textColor)) {
+ $textColor = array($this->rand(0, 150), $this->rand(0, 150), $this->rand(0, 150));
+ } else {
+ $textColor = $this->textColor;
+ }
+ $col = imagecolorallocate($image, $textColor[0], $textColor[1], $textColor[2]);
+
+ // Write the letters one by one, with random angle
+ for ($i=0; $i<$length; $i++) {
+ $box = imagettfbbox($size, 0, $font, $phrase[$i]);
+ $w = $box[2] - $box[0];
+ $angle = $this->rand(-$this->maxAngle, $this->maxAngle);
+ $offset = $this->rand(-$this->maxOffset, $this->maxOffset);
+ imagettftext($image, $size, $angle, $x, $y + $offset, $col, $font, $phrase[$i]);
+ $x += $w;
+ }
+
+ return $col;
+ }
+
+ /**
+ * Try to read the code against an OCR
+ */
+ public function isOCRReadable()
+ {
+ if (!is_dir($this->tempDir)) {
+ @mkdir($this->tempDir, 0755, true);
+ }
+
+ $tempj = $this->tempDir . uniqid('captcha', true) . '.jpg';
+ $tempp = $this->tempDir . uniqid('captcha', true) . '.pgm';
+
+ $this->save($tempj);
+ shell_exec("convert $tempj $tempp");
+ $value = trim(strtolower(shell_exec("ocrad $tempp")));
+
+ @unlink($tempj);
+ @unlink($tempp);
+
+ return $this->testPhrase($value);
+ }
+
+ /**
+ * Builds while the code is readable against an OCR
+ */
+ public function buildAgainstOCR($width = 150, $height = 40, $font = null, $fingerprint = null)
+ {
+ do {
+ $this->build($width, $height, $font, $fingerprint);
+ } while ($this->isOCRReadable());
+ }
+
+ /**
+ * Generate the image
+ */
+ public function build($width = 150, $height = 40, $font = null, $fingerprint = null)
+ {
+ if (null !== $fingerprint) {
+ $this->fingerprint = $fingerprint;
+ $this->useFingerprint = true;
+ } else {
+ $this->fingerprint = array();
+ $this->useFingerprint = false;
+ }
+
+ if ($font === null) {
+ $font = __DIR__ . '/Font/captcha'.$this->rand(0, 5).'.ttf';
+ }
+
+ if (empty($this->backgroundImages)) {
+ // if background images list is not set, use a color fill as a background
+ $image = imagecreatetruecolor($width, $height);
+ if ($this->backgroundColor == null) {
+ $bg = imagecolorallocate($image, $this->rand(200, 255), $this->rand(200, 255), $this->rand(200, 255));
+ } else {
+ $color = $this->backgroundColor;
+ $bg = imagecolorallocate($image, $color[0], $color[1], $color[2]);
+ }
+ $this->background = $bg;
+ imagefill($image, 0, 0, $bg);
+ } else {
+ // use a random background image
+ $randomBackgroundImage = $this->backgroundImages[rand(0, count($this->backgroundImages)-1)];
+
+ $imageType = $this->validateBackgroundImage($randomBackgroundImage);
+
+ $image = $this->createBackgroundImageFromType($randomBackgroundImage, $imageType);
+ }
+
+ // Apply effects
+ if (!$this->ignoreAllEffects) {
+ $square = $width * $height;
+ $effects = $this->rand($square/3000, $square/2000);
+
+ // set the maximum number of lines to draw in front of the text
+ if ($this->maxBehindLines != null && $this->maxBehindLines > 0) {
+ $effects = min($this->maxBehindLines, $effects);
+ }
+
+ if ($this->maxBehindLines !== 0) {
+ for ($e = 0; $e < $effects; $e++) {
+ $this->drawLine($image, $width, $height);
+ }
+ }
+ }
+
+ // Write CAPTCHA text
+ $color = $this->writePhrase($image, $this->phrase, $font, $width, $height);
+
+ // Apply effects
+ if (!$this->ignoreAllEffects) {
+ $square = $width * $height;
+ $effects = $this->rand($square/3000, $square/2000);
+
+ // set the maximum number of lines to draw in front of the text
+ if ($this->maxFrontLines != null && $this->maxFrontLines > 0) {
+ $effects = min($this->maxFrontLines, $effects);
+ }
+
+ if ($this->maxFrontLines !== 0) {
+ for ($e = 0; $e < $effects; $e++) {
+ $this->drawLine($image, $width, $height, $color);
+ }
+ }
+ }
+
+ // Distort the image
+ if ($this->distortion && !$this->ignoreAllEffects) {
+ $image = $this->distort($image, $width, $height, $bg);
+ }
+
+ // Post effects
+ if (!$this->ignoreAllEffects) {
+ $this->postEffect($image);
+ }
+
+ $this->contents = $image;
+
+ return $this;
+ }
+
+ /**
+ * Distorts the image
+ */
+ public function distort($image, $width, $height, $bg)
+ {
+ $contents = imagecreatetruecolor($width, $height);
+ $X = $this->rand(0, $width);
+ $Y = $this->rand(0, $height);
+ $phase = $this->rand(0, 10);
+ $scale = 1.1 + $this->rand(0, 10000) / 30000;
+ for ($x = 0; $x < $width; $x++) {
+ for ($y = 0; $y < $height; $y++) {
+ $Vx = $x - $X;
+ $Vy = $y - $Y;
+ $Vn = sqrt($Vx * $Vx + $Vy * $Vy);
+
+ if ($Vn != 0) {
+ $Vn2 = $Vn + 4 * sin($Vn / 30);
+ $nX = $X + ($Vx * $Vn2 / $Vn);
+ $nY = $Y + ($Vy * $Vn2 / $Vn);
+ } else {
+ $nX = $X;
+ $nY = $Y;
+ }
+ $nY = $nY + $scale * sin($phase + $nX * 0.2);
+
+ if ($this->interpolation) {
+ $p = $this->interpolate(
+ $nX - floor($nX),
+ $nY - floor($nY),
+ $this->getCol($image, floor($nX), floor($nY), $bg),
+ $this->getCol($image, ceil($nX), floor($nY), $bg),
+ $this->getCol($image, floor($nX), ceil($nY), $bg),
+ $this->getCol($image, ceil($nX), ceil($nY), $bg)
+ );
+ } else {
+ $p = $this->getCol($image, round($nX), round($nY), $bg);
+ }
+
+ if ($p == 0) {
+ $p = $bg;
+ }
+
+ imagesetpixel($contents, $x, $y, $p);
+ }
+ }
+
+ return $contents;
+ }
+
+ /**
+ * Saves the Captcha to a jpeg file
+ */
+ public function save($filename, $quality = 90)
+ {
+ imagejpeg($this->contents, $filename, $quality);
+ }
+
+ /**
+ * Gets the image GD
+ */
+ public function getGd()
+ {
+ return $this->contents;
+ }
+
+ /**
+ * Gets the image contents
+ */
+ public function get($quality = 90)
+ {
+ ob_start();
+ $this->output($quality);
+
+ return ob_get_clean();
+ }
+
+ /**
+ * Gets the HTML inline base64
+ */
+ public function inline($quality = 90)
+ {
+ return 'data:image/jpeg;base64,' . base64_encode($this->get($quality));
+ }
+
+ /**
+ * Outputs the image
+ */
+ public function output($quality = 90)
+ {
+ imagejpeg($this->contents, null, $quality);
+ }
+
+ /**
+ * @return array
+ */
+ public function getFingerprint()
+ {
+ return $this->fingerprint;
+ }
+
+ /**
+ * Returns a random number or the next number in the
+ * fingerprint
+ */
+ protected function rand($min, $max)
+ {
+ if (!is_array($this->fingerprint)) {
+ $this->fingerprint = array();
+ }
+
+ if ($this->useFingerprint) {
+ $value = current($this->fingerprint);
+ next($this->fingerprint);
+ } else {
+ $value = mt_rand($min, $max);
+ $this->fingerprint[] = $value;
+ }
+
+ return $value;
+ }
+
+ /**
+ * @param $x
+ * @param $y
+ * @param $nw
+ * @param $ne
+ * @param $sw
+ * @param $se
+ *
+ * @return int
+ */
+ protected function interpolate($x, $y, $nw, $ne, $sw, $se)
+ {
+ list($r0, $g0, $b0) = $this->getRGB($nw);
+ list($r1, $g1, $b1) = $this->getRGB($ne);
+ list($r2, $g2, $b2) = $this->getRGB($sw);
+ list($r3, $g3, $b3) = $this->getRGB($se);
+
+ $cx = 1.0 - $x;
+ $cy = 1.0 - $y;
+
+ $m0 = $cx * $r0 + $x * $r1;
+ $m1 = $cx * $r2 + $x * $r3;
+ $r = (int) ($cy * $m0 + $y * $m1);
+
+ $m0 = $cx * $g0 + $x * $g1;
+ $m1 = $cx * $g2 + $x * $g3;
+ $g = (int) ($cy * $m0 + $y * $m1);
+
+ $m0 = $cx * $b0 + $x * $b1;
+ $m1 = $cx * $b2 + $x * $b3;
+ $b = (int) ($cy * $m0 + $y * $m1);
+
+ return ($r << 16) | ($g << 8) | $b;
+ }
+
+ /**
+ * @param $image
+ * @param $x
+ * @param $y
+ *
+ * @return int
+ */
+ protected function getCol($image, $x, $y, $background)
+ {
+ $L = imagesx($image);
+ $H = imagesy($image);
+ if ($x < 0 || $x >= $L || $y < 0 || $y >= $H) {
+ return $background;
+ }
+
+ return imagecolorat($image, $x, $y);
+ }
+
+ /**
+ * @param $col
+ *
+ * @return array
+ */
+ protected function getRGB($col)
+ {
+ return array(
+ (int) ($col >> 16) & 0xff,
+ (int) ($col >> 8) & 0xff,
+ (int) ($col) & 0xff,
+ );
+ }
+
+ /**
+ * Validate the background image path. Return the image type if valid
+ *
+ * @param string $backgroundImage
+ * @return string
+ * @throws Exception
+ */
+ protected function validateBackgroundImage($backgroundImage)
+ {
+ // check if file exists
+ if (!file_exists($backgroundImage)) {
+ $backgroundImageExploded = explode('/', $backgroundImage);
+ $imageFileName = count($backgroundImageExploded) > 1? $backgroundImageExploded[count($backgroundImageExploded)-1] : $backgroundImage;
+
+ throw new Exception('Invalid background image: ' . $imageFileName);
+ }
+
+ // check image type
+ $finfo = finfo_open(FILEINFO_MIME_TYPE); // return mime type ala mimetype extension
+ $imageType = finfo_file($finfo, $backgroundImage);
+ finfo_close($finfo);
+
+ if (!in_array ($imageType, $this->allowedBackgroundImageTypes)) {
+ throw new Exception('Invalid background image type! Allowed types are: ' . join(', ', $this->allowedBackgroundImageTypes));
+ }
+
+ return $imageType;
+ }
+
+ /**
+ * Create background image from type
+ *
+ * @param string $backgroundImage
+ * @param string $imageType
+ * @return resource
+ * @throws Exception
+ */
+ protected function createBackgroundImageFromType($backgroundImage, $imageType)
+ {
+ switch ($imageType) {
+ case 'image/jpeg':
+ $image = imagecreatefromjpeg($backgroundImage);
+ break;
+ case 'image/png':
+ $image = imagecreatefrompng($backgroundImage);
+ break;
+ case 'image/gif':
+ $image = imagecreatefromgif($backgroundImage);
+ break;
+
+ default:
+ throw new Exception('Not supported file type for background image!');
+ break;
+ }
+
+ return $image;
+ }
+}
generated by cgit v1.2.3 (git 2.46.0) at 2024-11-22 17:24:36 +0000