Really Simple CAPTCHA - Version 1.2

Version Description

  • File name sanitization added.
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Release Info

Developer takayukister
Plugin Icon 128x128 Really Simple CAPTCHA
Version 1.2
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Code changes from version 1.1 to 1.2

Files changed (3) hide show
  1. README.txt +7 -4
  2. license.txt +339 -0
  3. really-simple-captcha.php +29 -19
README.txt CHANGED
@@ -1,10 +1,10 @@
1
  === Really Simple CAPTCHA ===
2
  Contributors: takayukister
3
- Donate link: http://pledgie.com/campaigns/3259
4
  Tags: captcha
5
  Requires at least: 2.8
6
- Tested up to: 2.8.5
7
- Stable tag: 1.1
8
 
9
  Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.
10
 
@@ -60,7 +60,7 @@ And last, remove the temporary image and PHP files, as they are no longer in use
60
 
61
  That's all.
62
 
63
- If you wish to see a live sample of this, you can try Contact Form 7.
64
 
65
  == Installation ==
66
 
@@ -89,6 +89,9 @@ If you have any further questions, please submit them [to the support forum](htt
89
 
90
  == Changelog ==
91
 
 
 
 
92
  = 1.1 =
93
  * The required WordPress version changed to 2.8 and higher.
94
  * `cleanup()` method added.
1
  === Really Simple CAPTCHA ===
2
  Contributors: takayukister
3
+ Donate link: http://contactform7.com/donate/
4
  Tags: captcha
5
  Requires at least: 2.8
6
+ Tested up to: 3.0.1
7
+ Stable tag: 1.2
8
 
9
  Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.
10
 
60
 
61
  That's all.
62
 
63
+ If you wish to see a live sample of this, you can try [Contact Form 7](http://contactform7.com/).
64
 
65
  == Installation ==
66
 
89
 
90
  == Changelog ==
91
 
92
+ = 1.2 =
93
+ * File name sanitization added.
94
+
95
  = 1.1 =
96
  * The required WordPress version changed to 2.8 and higher.
97
  * `cleanup()` method added.
license.txt ADDED
@@ -0,0 +1,339 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ <signature of Ty Coon>, 1 April 1989
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really-simple-captcha.php CHANGED
@@ -4,11 +4,11 @@ Plugin Name: Really Simple CAPTCHA
4
  Plugin URI: http://ideasilo.wordpress.com/2009/03/14/really-simple-captcha/
5
  Description: Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.
6
  Author: Takayuki Miyoshi
7
- Version: 1.1
8
  Author URI: http://ideasilo.wordpress.com/
9
  */
10
 
11
- /* Copyright 2007-2009 Takayuki Miyoshi (email: takayukister at gmail.com)
12
 
13
  This program is free software; you can redistribute it and/or modify
14
  it under the terms of the GNU General Public License as published by
@@ -88,6 +88,7 @@ class ReallySimpleCaptcha {
88
  This function returns the filename of the CAPTCHA image temporary file */
89
 
90
  function generate_image( $prefix, $word ) {
 
91
  $filename = null;
92
 
93
  if ( $im = imagecreatetruecolor( $this->img_size[0], $this->img_size[1] ) ) {
@@ -107,25 +108,27 @@ class ReallySimpleCaptcha {
107
 
108
  switch ( $this->img_type ) {
109
  case 'jpeg':
110
- $filename = $prefix . '.jpeg';
111
- imagejpeg( $im, $this->tmp_dir . $filename );
112
  break;
113
  case 'gif':
114
- $filename = $prefix . '.gif';
115
- imagegif( $im, $this->tmp_dir . $filename );
116
  break;
117
  case 'png':
118
  default:
119
- $filename = $prefix . '.png';
120
- imagepng( $im, $this->tmp_dir . $filename );
121
  }
122
 
123
  imagedestroy( $im );
124
- @chmod( $this->tmp_dir . $filename, $this->file_mode );
125
  }
126
 
127
- if ( $fh = fopen( $this->tmp_dir . $prefix . '.php', 'w' ) ) {
128
- @chmod( $this->tmp_dir . $prefix . '.php', $this->file_mode );
 
 
129
  fwrite( $fh, '<?php $captcha = "' . $word . '"; ?>' );
130
  fclose( $fh );
131
  }
@@ -137,8 +140,12 @@ class ReallySimpleCaptcha {
137
  Return true if the two match, otherwise return false. */
138
 
139
  function check( $prefix, $response ) {
140
- if ( is_readable( $this->tmp_dir . $prefix . '.php' ) ) {
141
- include( $this->tmp_dir . $prefix . '.php' );
 
 
 
 
142
  if ( 0 == strcasecmp( $response, $captcha ) )
143
  return true;
144
  }
@@ -151,7 +158,8 @@ class ReallySimpleCaptcha {
151
  $suffixes = array( '.jpeg', '.gif', '.png', '.php' );
152
 
153
  foreach ( $suffixes as $suffix ) {
154
- $file = $this->tmp_dir . $prefix . $suffix;
 
155
  if ( is_file( $file ) )
156
  unlink( $file );
157
  }
@@ -160,7 +168,7 @@ class ReallySimpleCaptcha {
160
  /* Clean up dead files older than $minutes in the tmp folder */
161
 
162
  function cleanup( $minutes = 60 ) {
163
- $dir = $this->tmp_dir;
164
 
165
  if ( ! is_dir( $dir ) || ! is_readable( $dir ) || ! is_writable( $dir ) )
166
  return false;
@@ -168,13 +176,15 @@ class ReallySimpleCaptcha {
168
  $count = 0;
169
 
170
  if ( $handle = @opendir( $dir ) ) {
171
- while ( false !== ( $file = readdir( $handle ) ) ) {
172
- if ( ! preg_match( '/^[0-9]+\.(php|png|gif|jpeg)$/', $file ) )
173
  continue;
174
 
175
- $stat = @stat( $dir . $file );
 
 
176
  if ( ( $stat['mtime'] + $minutes * 60 ) < time() ) {
177
- @unlink( $dir . $file );
178
  $count += 1;
179
  }
180
  }
4
  Plugin URI: http://ideasilo.wordpress.com/2009/03/14/really-simple-captcha/
5
  Description: Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.
6
  Author: Takayuki Miyoshi
7
+ Version: 1.2
8
  Author URI: http://ideasilo.wordpress.com/
9
  */
10
 
11
+ /* Copyright 2007-2010 Takayuki Miyoshi (email: takayukister at gmail.com)
12
 
13
  This program is free software; you can redistribute it and/or modify
14
  it under the terms of the GNU General Public License as published by
88
  This function returns the filename of the CAPTCHA image temporary file */
89
 
90
  function generate_image( $prefix, $word ) {
91
+ $dir = trailingslashit( $this->tmp_dir );
92
  $filename = null;
93
 
94
  if ( $im = imagecreatetruecolor( $this->img_size[0], $this->img_size[1] ) ) {
108
 
109
  switch ( $this->img_type ) {
110
  case 'jpeg':
111
+ $filename = sanitize_file_name( $prefix . '.jpeg' );
112
+ imagejpeg( $im, $dir . $filename );
113
  break;
114
  case 'gif':
115
+ $filename = sanitize_file_name( $prefix . '.gif' );
116
+ imagegif( $im, $dir . $filename );
117
  break;
118
  case 'png':
119
  default:
120
+ $filename = sanitize_file_name( $prefix . '.png' );
121
+ imagepng( $im, $dir . $filename );
122
  }
123
 
124
  imagedestroy( $im );
125
+ @chmod( $dir . $filename, $this->file_mode );
126
  }
127
 
128
+ $answer_file = $dir . sanitize_file_name( $prefix . '.php' );
129
+
130
+ if ( $fh = fopen( $answer_file, 'w' ) ) {
131
+ @chmod( $answer_file, $this->file_mode );
132
  fwrite( $fh, '<?php $captcha = "' . $word . '"; ?>' );
133
  fclose( $fh );
134
  }
140
  Return true if the two match, otherwise return false. */
141
 
142
  function check( $prefix, $response ) {
143
+ $dir = trailingslashit( $this->tmp_dir );
144
+ $filename = sanitize_file_name( $prefix . '.php' );
145
+ $file = $dir . $filename;
146
+
147
+ if ( is_readable( $file ) ) {
148
+ include( $file );
149
  if ( 0 == strcasecmp( $response, $captcha ) )
150
  return true;
151
  }
158
  $suffixes = array( '.jpeg', '.gif', '.png', '.php' );
159
 
160
  foreach ( $suffixes as $suffix ) {
161
+ $filename = sanitize_file_name( $prefix . $suffix );
162
+ $file = trailingslashit( $this->tmp_dir ) . $filename;
163
  if ( is_file( $file ) )
164
  unlink( $file );
165
  }
168
  /* Clean up dead files older than $minutes in the tmp folder */
169
 
170
  function cleanup( $minutes = 60 ) {
171
+ $dir = trailingslashit( $this->tmp_dir );
172
 
173
  if ( ! is_dir( $dir ) || ! is_readable( $dir ) || ! is_writable( $dir ) )
174
  return false;
176
  $count = 0;
177
 
178
  if ( $handle = @opendir( $dir ) ) {
179
+ while ( false !== ( $filename = readdir( $handle ) ) ) {
180
+ if ( ! preg_match( '/^[0-9]+\.(php|png|gif|jpeg)$/', $filename ) )
181
  continue;
182
 
183
+ $file = $dir . $filename;
184
+
185
+ $stat = @stat( $file );
186
  if ( ( $stat['mtime'] + $minutes * 60 ) < time() ) {
187
+ @unlink( $file );
188
  $count += 1;
189
  }
190
  }