| Re: error en codigo de seguridad (kcaptcha)
si la ruta es include/kcapthcha/index.php
el codigo de todo es el siguiente:
index.php
-----------
<?php
include ('kcaptcha.php');
session_register("captcha_keystring");
$captcha = new KCAPTCHA();
?>
kcaptcha.php
-------------------
<?php
class KCAPTCHA
{
function KCAPTCHA()
{
require (dirname(__file__) . '/kcaptcha_config.php');
$fonts = array();
$fontsdir_absolute = dirname(__file__) . '/' . $fontsdir;
if ($handle = opendir($fontsdir_absolute))
{
while (false !== ($file = readdir($handle)))
{
if (preg_match('/\.png$/i', $file))
{
$fonts[] = $fontsdir_absolute . '/' . $file;
}
}
closedir($handle);
}
$alphabet_length = strlen($alphabet);
while (true)
{
while (true)
{
$this->keystring = '';
for ($i = 0; $i < $length; $i++)
{
$this->keystring .= $allowed_symbols{mt_rand(0, strlen($allowed_symbols) - 1)};
}
if (!preg_match('/cp|cb|ck|c6|c9/', $this->keystring)) break;
}
$font_file = $fonts[mt_rand(0, count($fonts) - 1)];
$font = imagecreatefrompng($font_file);
imagealphablending($font, false);
imagesavealpha($font, true);
$black = imagecolorallocate($font, 0, 0, 0);
$fontfile_width = imagesx($font);
$fontfile_height = imagesy($font) - 1;
$font_metrics = array();
$symbol = 0;
$reading_symbol = false;
for ($i = 0; $i < $fontfile_width && $symbol < $alphabet_length; $i++)
{
$transparent = (imagecolorat($font, $i, 0) >> 24) == 127;
if (!$reading_symbol && !$transparent)
{
$font_metrics[$alphabet{$symbol}] = array('start' => $i);
$reading_symbol = true;
continue;
}
if ($reading_symbol && $transparent)
{
$font_metrics[$alphabet{$symbol}]['end'] = $i;
$reading_symbol = false;
$symbol++;
continue;
}
}
$img = imagecreatetruecolor($width, $height);
$white = imagecolorallocate($img, 255, 255, 255);
$black = imagecolorallocate($img, 0, 0, 0);
imagefilledrectangle($img, 0, 0, $width - 1, $height - 1, $white);
$x = 1;
for ($i = 0; $i < $length; $i++)
{
$m = $font_metrics[$this->keystring
{
$i}
];
$y = mt_rand(-$fluctuation_amplitude, $fluctuation_amplitude) + ($height - $fontfile_height) / 2 + 2;
if ($no_spaces)
{
$shift = 0;
if ($i > 0)
{
$shift = 1000;
for ($sy = 1; $sy < $fontfile_height - 15; $sy += 2)
{
for ($sx = $m['start'] - 1; $sx < $m['end']; $sx++)
{
$rgb = imagecolorat($font, $sx, $sy);
$opacity = $rgb >> 24;
if ($opacity < 127)
{
$left = $sx - $m['start'] + $x;
$py = $sy + $y;
for ($px = min($left, $width - 1); $px > $left - 15 && $px >= 0; $px--)
{
$color = imagecolorat($img, $px, $py) & 0xff;
if ($color + $opacity < 190)
{
if ($shift > $left - $px)
{
$shift = $left - $px;
}
break;
}
}
break;
}
}
}
}
} else
{
$shift = 1;
}
imagecopy($img, $font, $x - $shift, $y, $m['start'], 1, $m['end'] - $m['start'], $fontfile_height);
$x += $m['end'] - $m['start'] - $shift;
}
if ($x < $width - 10) break;
}
$center = $x / 2;
$img2 = imagecreatetruecolor($width, $height + ($show_credits ? '12' : 0));
$foreground = imagecolorallocate($img2, $foreground_color[0], $foreground_color[1], $foreground_color[2]);
$background = imagecolorallocate($img2, $background_color[0], $background_color[1], $background_color[2]);
imagefilledrectangle($img2, 0, $height, $width - 1, $height + 12, $foreground);
$credits = empty($credits) ? $_SERVER['HTTP_HOST'] : $credits;
imagestring($img2, 2, $width / 2 - ImageFontWidth(2) * strlen($credits) / 2, $height - 2, $credits, $background);
$rand1 = mt_rand(700000, 1000000) / 10000000;
$rand2 = mt_rand(700000, 1000000) / 10000000;
$rand3 = mt_rand(700000, 1000000) / 10000000;
$rand4 = mt_rand(700000, 1000000) / 10000000;
$rand5 = mt_rand(0, 3141592) / 1000000;
$rand6 = mt_rand(0, 3141592) / 1000000;
$rand7 = mt_rand(0, 3141592) / 1000000;
$rand8 = mt_rand(0, 3141592) / 1000000;
$rand9 = mt_rand(300, 420) / 110;
$rand10 = mt_rand(300, 450) / 110;
for ($x = 0; $x < $width; $x++)
{
for ($y = 0; $y < $height; $y++)
{
$sx = $x + (sin($x * $rand1 + $rand5) + sin($y * $rand3 + $rand6)) * $rand9 - $width / 2 + $center + 1;
$sy = $y + (sin($x * $rand2 + $rand7) + sin($y * $rand4 + $rand8)) * $rand10;
if ($sx < 0 || $sy < 0 || $sx >= $width - 1 || $sy >= $height - 1)
{
$color = 255;
$color_x = 255;
$color_y = 255;
$color_xy = 255;
} else
{
$color = imagecolorat($img, $sx, $sy) & 0xFF;
$color_x = imagecolorat($img, $sx + 1, $sy) & 0xFF;
$color_y = imagecolorat($img, $sx, $sy + 1) & 0xFF;
$color_xy = imagecolorat($img, $sx + 1, $sy + 1) & 0xFF;
}
if ($color == 0 && $color_x == 0 && $color_y == 0 && $color_xy == 0)
{
$newred = $foreground_color[0];
$newgreen = $foreground_color[1];
$newblue = $foreground_color[2];
} else
if ($color == 255 && $color_x == 255 && $color_y == 255 && $color_xy == 255)
{
$newred = $background_color[0];
$newgreen = $background_color[1];
$newblue = $background_color[2];
} else
{
$frsx = $sx - floor($sx);
$frsy = $sy - floor($sy);
$frsx1 = 1 - $frsx;
$frsy1 = 1 - $frsy;
$newcolor = ($color * $frsx1 * $frsy1 + $color_x * $frsx * $frsy1 + $color_y * $frsx1 * $frsy + $color_xy * $frsx * $frsy);
if ($newcolor > 255) $newcolor = 255;
$newcolor = $newcolor / 255;
$newcolor0 = 1 - $newcolor;
$newred = $newcolor0 * $foreground_color[0] + $newcolor * $background_color[0];
$newgreen = $newcolor0 * $foreground_color[1] + $newcolor * $background_color[1];
$newblue = $newcolor0 * $foreground_color[2] + $newcolor * $background_color[2];
}
imagesetpixel($img2, $x, $y, imagecolorallocate($img2, $newred, $newgreen, $newblue));
}
}
$_SESSION['captcha_keystring'] = $this->keystring;
if (function_exists("imagejpeg"))
{
header("Content-Type: image/jpeg");
imagejpeg($img2, null, $jpeg_quality);
} else
if (function_exists("imagegif"))
{
header("Content-Type: image/gif");
imagegif($img2);
} else
if (function_exists("imagepng"))
{
header("Content-Type: image/x-png");
imagepng($img2);
}
}
function getKeyString()
{
return $this->keystring;
}
}
?>
kcapcha_config.php
-----------------------
<?php
$alphabet = "0123456789abcdefghijklmnopqrstuvwxyz";
$allowed_symbols = "23456789abcdefghkmnpqrstuvxyz";
$fontsdir = 'fonts';
$length = mt_rand(4, 5);
$width = 150;
$height = 40;
$fluctuation_amplitude = 3;
$no_spaces = false;
$show_credits = false;
$credits = '';
$foreground_color = array(0, 0, 0);
$background_color = array(255, 255, 255);
$jpeg_quality = 100;
?>
y despues estan dos carpetas mas que son fonts y util |