feat: change structure

api/src/Lib/PCaptcha.php

@@ -0,0 +1,239 @@
+<?php
+namespace App\Lib;
+/**
+ * PCaptcha :
+ * A simple/lightweight class provides you with the necessary tools to generate a friendly/secure captcha and validate it 
+ *
+ * @author Bader Almutairi (Phpfalcon)
+ * @link https://github.com/phpfalcon/pcaptcha/
+ * @license http://opensource.org/licenses/MIT MIT License
+ */
+
+class PCaptcha
+{
+	//options
+	var $width = 150;
+	var $hight = 45;
+	var $size = 0; //this will be generated automaticlly - you can set it manually
+	var $scale = 0; //this will be generated automaticlly - you can set it manually
+	var $leng  = 5;
+	var $noise_level = 0;
+	var $pixlized = 2;
+	var $angle = 20;
+	var $grid = true;
+	var $font; 
+	var $drawcross = false;
+	var $drawcircles = true;
+	var $background = array(0,  0, 0); //rand if empty
+	var $text = array(255, 255, 255); //white
+	var $colortwo = array(204, 204, 204); //grey
+	var $postfield = 'panswer';
+	
+	
+	/**
+	 * called outside to genearate captcha
+	 *
+	 * @return void
+	 */
+	function get_captcha()
+	{
+		if (@extension_loaded('gd') && function_exists('gd_info')) {
+            try {
+                $this->gen_cpatcha_image();
+            } catch (Throwable $e) {
+                http_response_code(500);
+                header("Content-Type: text/plain");
+                echo "Captcha generation failed: " . $e->getMessage();
+            }
+        } else {
+            http_response_code(500);
+            header("Content-Type: text/plain");
+            echo "GD library not found";
+        }
+        exit();
+	}
+	
+	
+	/**
+	 * Validate captcha data in post fields 
+	 *
+	 * @return bool
+	 */
+	function validate_captcha($answer)
+	{
+		// $answer = trim((string) ($_POST[$this->postfield] ?? ''));
+
+		if((!empty($_SESSION['p_code']) &&  $answer != '') && ($_SESSION['p_code'] == $answer))
+		{
+			unset($_SESSION['p_code']);
+			return true;
+		}
+		
+		return false;
+	}
+	
+	
+
+	/**
+	 * Generate a CAPTCHA 
+	 *
+	 * @return void
+	 */
+	function gen_cpatcha_image()
+	{
+		
+
+		if(!isset($this->font))
+		{
+			$this->font = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'arial.ttf';
+		}
+		if($this->background[0] == 0)
+		{
+			$this->background[0] = mt_rand(70, 200);
+			$this->background[1] = 0;
+			$this->background[2] = mt_rand(70, 200);
+		}
+		
+		//generate a secure random int by using openssl 
+		$hash = bin2hex(openssl_random_pseudo_bytes(16)); 
+		$num = hexdec( substr(sha1($hash) , 0,15) );
+		$security_code = substr(intval($num) ,0, $this->leng);  //trim it down to $leng 
+		
+		//store the security code
+		$_SESSION["p_code"] = $security_code;
+
+		//Set the image width and height
+		$width = $this->width;
+		$height = $this->hight; 
+		
+		$sc = 0;
+		
+		//gen scale
+		if($this->scale <= 0)
+		{
+			$sc = $height / $width;
+			$sc = ($sc < 1) ? 2 : $sc + 2;
+		}
+		else
+		{
+			$sc = $this->scale;
+		}
+		
+		//gen size
+		$size = ($this->size <= 0) ? round($height / $sc) : $this->size;
+	
+
+		//Create the image resource
+		$image = ImageCreate($width, $height);  
+
+		 
+		//grab our paint tools , colors, white, black and gray
+		$white = ImageColorAllocate($image, $this->text[0], $this->text[1], $this->text[2]);
+		$black = ImageColorAllocate($image, $this->background[0], $this->background[1], $this->background[2]);
+		$grey = ImageColorAllocate($image, $this->colortwo[0], $this->colortwo[1], $this->colortwo[2]);
+
+
+		//fill the world in black
+		ImageFill($image, 0, 0, $black); 
+		
+		$text_count = strlen($security_code);
+		$text = str_split($security_code); 
+		$step = round($width/3) - $sc * 15; 
+		$y = $size + mt_rand(0, round($height/3) - $sc) ;
+		foreach($text as $txt)  
+		{ 
+		    $box = imagettfbbox( $size, 0,  $this->font, $txt ); 
+		    $x = abs($box[2]-$box[0]); 
+
+		    imagettftext($image, $size, mt_rand(-$this->angle, 0), $step, $y, $white, $this->font, $txt ); 
+		    $step += ($x+5); 
+		} 
+		
+		if($this->pixlized > 1)
+		{
+			imagefilter($image, IMG_FILTER_PIXELATE, $this->pixlized, true);
+		}
+		
+		if($this->grid)
+		{
+			$transp = $black;
+			$this->imagegrid($image, $width, $height, 10, $transp);
+		}
+		
+		if($this->drawcircles)
+		{
+		$transp2 = ImageColorAllocate($image, $this->background[0] + 30, $this->background[1], $this->background[2] + 30);
+		$this->imagecircles($image, $width, $height, 10, $transp2);
+		}
+		
+		if ($this->noise_level > 0) 
+		{
+			$noise_level = $this->noise_level; 
+
+			for ($i = 0; $i < $noise_level; ++$i) 
+			{
+				$x = mt_rand(2, $width);
+				$y = mt_rand(2, $height);
+				$size = 2;
+				imagefilledarc($image, $x, $y, $size, $size, 0, 360, $white, IMG_ARC_PIE);
+			}
+			
+
+		}
+		
+		//drow borders
+		ImageRectangle($image,0,0,$width-1,$height-1,$grey); 
+		
+		if($this->drawcross)
+		{
+ 			imageline($image, 0, $height/2, $width, $height/2, $grey); 
+ 			imageline($image, $width/2, 0, $width/2, $height, $grey); 
+		}
+		
+		//header file
+		header("Content-Type: image/png"); 
+
+		//Output the newly created image in jpeg format 
+		ImagePng($image);
+   
+		//Free up resources
+		ImageDestroy($image);
+
+	}
+	
+	/**
+	 * Draw circles
+	 * @param image $image given image
+	 * @param width $w image's width
+	 * @param height $w image's height
+	 * @param size $w circles size
+	 * @param color $color
+	 * @return void
+	 */
+	function imagecircles($image, $w, $h, $s, $color)
+	{
+	    $x = $w/2;
+	    $y = $h/2;
+	    for($iw=1; $iw<$w; $iw++)
+	    {
+		    imagearc($image, $x, $y, $iw*$s, $iw*$s,  0, 360, $color);
+
+	    }
+	    
+	}
+	
+	/**
+	 * Draws a nice looking grid
+	 * @param image $image given image
+	 * @param width $w image's width
+	 * @param height $w image's height
+	 * @param size $w size
+	 * @param color $color
+	 * @return void
+	 */
+	function imagegrid($image, $w, $h, $s, $color)
+	{
+	    for($iw=1; $iw<$w/$s; $iw++){imageline($image, $iw*$s, 0, $iw*$s, $w, $color );}
+	    for($ih=1; $ih<$h/$s; $ih++){imageline($image, 0, $ih*$s, $w, $ih*$s, $color );}
+	}
+}