Really Simple CAPTCHA - Version 2.0

Version Description

  • Did some rewrite of the code following the coding standard.
  • Updated the license file; added a section for bundled font files.
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Release Info

Developer takayukister
Plugin Icon 128x128 Really Simple CAPTCHA
Version 2.0
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Code changes from version 1.9 to 2.0

Files changed (4) hide show
  1. license.txt +17 -333
  2. readme.txt +13 -18
  3. really-simple-captcha.php +34 -39
  4. tmp/index.php +0 -1
license.txt CHANGED
@@ -1,339 +1,23 @@
1
- GNU GENERAL PUBLIC LICENSE
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- Version 2, June 1991
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- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
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1
+ Really Simple CAPTCHA - WordPress Plugin, 2007-2017 Takayuki Miyoshi
2
+ Really Simple CAPTCHA is distributed under the terms of the GNU GPL
3
 
4
+ This program is free software; you can redistribute it and/or modify
5
+ it under the terms of the GNU General Public License as published by
6
+ the Free Software Foundation; either version 2 of the License, or
7
+ (at your option) any later version.
8
 
9
+ This program is distributed in the hope that it will be useful,
10
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
11
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
+ GNU General Public License for more details.
13
 
14
+ You should have received a copy of the GNU General Public License
15
+ along with this program; if not, write to the Free Software
16
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 
 
 
 
 
 
17
 
 
 
 
 
 
 
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+ Really Simple CAPTCHA WordPress Plugin bundles the following third-party resources:
 
 
 
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+ Gentium Basic Release 1.102
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+ Gentium is released under the SIL Open Font License
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+ Source: http://software.sil.org/gentium/
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
readme.txt CHANGED
@@ -1,18 +1,18 @@
1
  === Really Simple CAPTCHA ===
2
  Contributors: takayukister
3
- Donate link: http://contactform7.com/donate/
4
  Tags: captcha
5
- Requires at least: 4.4
6
- Tested up to: 4.5.1
7
- Stable tag: 1.9
8
  License: GPLv2 or later
9
- License URI: http://www.gnu.org/licenses/gpl-2.0.html
10
 
11
  Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.
12
 
13
  == Description ==
14
 
15
- Really Simple CAPTCHA does not work alone and is intended to work with other plugins. It is originally created for [Contact Form 7](http://contactform7.com/), however, you can use it with your own plugin.
16
 
17
  Note: This product is "really simple" as its name suggests, i.e., it is not strongly secure. If you need perfect security, you should try other solutions.
18
 
@@ -62,7 +62,7 @@ And last, remove the temporary image and text files, as they are no longer in us
62
 
63
  That's all.
64
 
65
- If you wish to see a live sample of this, you can try [Contact Form 7](http://contactform7.com/).
66
 
67
  == Installation ==
68
 
@@ -83,7 +83,7 @@ Really Simple CAPTCHA needs GD and FreeType library installed on your server. As
83
 
84
  Also, make the temporary file folder writable. The location of the temporary file folder is managed by the instance variable `tmp_dir` of ReallySimpleCaptcha class. Note that the setting varies depending on the calling plugin. For example, Contact Form 7 uses `wp-contents/uploads/wpcf7_captcha` as the temporary folder basically, but it can use different folder depending on your settings.
85
 
86
- If you have any further questions, please submit them [to the support forum](http://wordpress.org/support/plugin/really-simple-captcha).
87
 
88
  == Screenshots ==
89
 
@@ -91,19 +91,14 @@ If you have any further questions, please submit them [to the support forum](htt
91
 
92
  == Changelog ==
93
 
 
 
 
 
 
94
  = 1.9 =
95
 
96
  * Change the default file mode: 0644 for image and 0640 for answer.
97
  * Add "Text Domain" field to the plugin header.
98
  * Update bundled font: Gentium Basic 1.102.
99
  * Add $max argument to cleanup() to prevent an endless file cleanup.
100
-
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- = 1.8.0.1 =
102
-
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- * The required WordPress version changed to 3.9 and higher.
104
- * Tested on WordPress 4.1.
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-
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- = 1.8 =
107
-
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- * The required WordPress version changed to 3.7 and higher.
109
- * Introduce normalize_path() to normalize file paths on different file systems.
1
  === Really Simple CAPTCHA ===
2
  Contributors: takayukister
3
+ Donate link: https://contactform7.com/donate/
4
  Tags: captcha
5
+ Requires at least: 4.7
6
+ Tested up to: 4.8
7
+ Stable tag: 2.0
8
  License: GPLv2 or later
9
+ License URI: https://www.gnu.org/licenses/gpl-2.0.html
10
 
11
  Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.
12
 
13
  == Description ==
14
 
15
+ Really Simple CAPTCHA does not work alone and is intended to work with other plugins. It is originally created for [Contact Form 7](https://contactform7.com/), however, you can use it with your own plugin.
16
 
17
  Note: This product is "really simple" as its name suggests, i.e., it is not strongly secure. If you need perfect security, you should try other solutions.
18
 
62
 
63
  That's all.
64
 
65
+ If you wish to see a live sample of this, you can try [Contact Form 7](https://contactform7.com/captcha/).
66
 
67
  == Installation ==
68
 
83
 
84
  Also, make the temporary file folder writable. The location of the temporary file folder is managed by the instance variable `tmp_dir` of ReallySimpleCaptcha class. Note that the setting varies depending on the calling plugin. For example, Contact Form 7 uses `wp-contents/uploads/wpcf7_captcha` as the temporary folder basically, but it can use different folder depending on your settings.
85
 
86
+ If you have any further questions, please submit them [to the support forum](https://wordpress.org/support/plugin/really-simple-captcha).
87
 
88
  == Screenshots ==
89
 
91
 
92
  == Changelog ==
93
 
94
+ = 2.0 =
95
+
96
+ * Did some rewrite of the code following the coding standard.
97
+ * Updated the license file; added a section for bundled font files.
98
+
99
  = 1.9 =
100
 
101
  * Change the default file mode: 0644 for image and 0640 for answer.
102
  * Add "Text Domain" field to the plugin header.
103
  * Update bundled font: Gentium Basic 1.102.
104
  * Add $max argument to cleanup() to prevent an endless file cleanup.
 
 
 
 
 
 
 
 
 
 
really-simple-captcha.php CHANGED
@@ -1,35 +1,32 @@
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  <?php
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  /*
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  Plugin Name: Really Simple CAPTCHA
4
- Plugin URI: http://contactform7.com/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
- Author URI: http://ideasilo.wordpress.com/
8
  Text Domain: really-simple-captcha
9
- Version: 1.9
10
  */
11
 
12
- /* Copyright 2007-2016 Takayuki Miyoshi (email: takayukister at gmail.com)
13
-
14
- This program is free software; you can redistribute it and/or modify
15
- it under the terms of the GNU General Public License as published by
16
- the Free Software Foundation; either version 2 of the License, or
17
- (at your option) any later version.
18
-
19
- This program is distributed in the hope that it will be useful,
20
- but WITHOUT ANY WARRANTY; without even the implied warranty of
21
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22
- GNU General Public License for more details.
23
-
24
- You should have received a copy of the GNU General Public License
25
- along with this program; if not, write to the Free Software
26
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27
- */
28
-
29
- define( 'REALLYSIMPLECAPTCHA_VERSION', '1.9' );
30
 
31
  class ReallySimpleCaptcha {
32
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
33
  public function __construct() {
34
  /* Characters available in images */
35
  $this->chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789';
@@ -42,7 +39,8 @@ class ReallySimpleCaptcha {
42
  dirname( __FILE__ ) . '/gentium/GenBkBasR.ttf',
43
  dirname( __FILE__ ) . '/gentium/GenBkBasI.ttf',
44
  dirname( __FILE__ ) . '/gentium/GenBkBasBI.ttf',
45
- dirname( __FILE__ ) . '/gentium/GenBkBasB.ttf' );
 
46
 
47
  /* Directory temporary keeping CAPTCHA images and corresponding text files */
48
  $this->tmp_dir = path_join( dirname( __FILE__ ), 'tmp' );
@@ -145,7 +143,7 @@ class ReallySimpleCaptcha {
145
  }
146
 
147
  imagedestroy( $im );
148
- @chmod( $file, $this->file_mode );
149
  }
150
 
151
  $this->generate_answer_file( $prefix, $word );
@@ -164,18 +162,16 @@ class ReallySimpleCaptcha {
164
  $answer_file = $dir . sanitize_file_name( $prefix . '.txt' );
165
  $answer_file = $this->normalize_path( $answer_file );
166
 
167
- if ( $fh = @fopen( $answer_file, 'w' ) ) {
168
  $word = strtoupper( $word );
169
  $salt = wp_generate_password( 64 );
170
  $hash = hash_hmac( 'md5', $word, $salt );
171
-
172
  $code = $salt . '|' . $hash;
173
-
174
  fwrite( $fh, $code );
175
  fclose( $fh );
176
  }
177
 
178
- @chmod( $answer_file, $this->answer_file_mode );
179
  }
180
 
181
  /**
@@ -197,9 +193,8 @@ class ReallySimpleCaptcha {
197
  $filename = sanitize_file_name( $prefix . '.txt' );
198
  $file = $this->normalize_path( $dir . $filename );
199
 
200
- if ( @is_readable( $file ) && ( $code = file_get_contents( $file ) ) ) {
201
  $code = explode( '|', $code, 2 );
202
-
203
  $salt = $code[0];
204
  $hash = $code[1];
205
 
@@ -224,8 +219,8 @@ class ReallySimpleCaptcha {
224
  $filename = sanitize_file_name( $prefix . $suffix );
225
  $file = $this->normalize_path( $dir . $filename );
226
 
227
- if ( @is_file( $file ) ) {
228
- @unlink( $file );
229
  }
230
  }
231
  }
@@ -240,31 +235,31 @@ class ReallySimpleCaptcha {
240
  $dir = trailingslashit( $this->tmp_dir );
241
  $dir = $this->normalize_path( $dir );
242
 
243
- if ( ! @is_dir( $dir ) || ! @is_readable( $dir ) ) {
244
  return false;
245
  }
246
 
247
  $is_win = ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) );
248
 
249
- if ( ! ( $is_win ? win_is_writable( $dir ) : @is_writable( $dir ) ) ) {
250
  return false;
251
  }
252
 
253
  $count = 0;
254
 
255
- if ( $handle = @opendir( $dir ) ) {
256
  while ( false !== ( $filename = readdir( $handle ) ) ) {
257
  if ( ! preg_match( '/^[0-9]+\.(php|txt|png|gif|jpeg)$/', $filename ) ) {
258
  continue;
259
  }
260
 
261
  $file = $this->normalize_path( $dir . $filename );
 
262
 
263
- $stat = @stat( $file );
264
  if ( ( $stat['mtime'] + $minutes * 60 ) < time() ) {
265
- if ( ! @unlink( $file ) ) {
266
- @chmod( $file, 0644 );
267
- @unlink( $file );
268
  }
269
 
270
  $count += 1;
@@ -300,7 +295,7 @@ class ReallySimpleCaptcha {
300
  return true;
301
  }
302
 
303
- if ( $handle = @fopen( $htaccess_file, 'w' ) ) {
304
  fwrite( $handle, 'Order deny,allow' . "\n" );
305
  fwrite( $handle, 'Deny from all' . "\n" );
306
  fwrite( $handle, '<Files ~ "^[0-9A-Za-z]+\\.(jpeg|gif|png)$">' . "\n" );
1
  <?php
2
  /*
3
  Plugin Name: Really Simple CAPTCHA
4
+ Plugin URI: https://contactform7.com/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
+ Author URI: https://ideasilo.wordpress.com/
8
  Text Domain: really-simple-captcha
9
+ Version: 2.0
10
  */
11
 
12
+ define( 'REALLYSIMPLECAPTCHA_VERSION', '2.0' );
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13
 
14
  class ReallySimpleCaptcha {
15
 
16
+ public $chars;
17
+ public $char_length;
18
+ public $fonts;
19
+ public $tmp_dir;
20
+ public $img_size;
21
+ public $bg;
22
+ public $fg;
23
+ public $base;
24
+ public $font_size;
25
+ public $font_char_width;
26
+ public $img_type;
27
+ public $file_mode;
28
+ public $answer_file_mode;
29
+
30
  public function __construct() {
31
  /* Characters available in images */
32
  $this->chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789';
39
  dirname( __FILE__ ) . '/gentium/GenBkBasR.ttf',
40
  dirname( __FILE__ ) . '/gentium/GenBkBasI.ttf',
41
  dirname( __FILE__ ) . '/gentium/GenBkBasBI.ttf',
42
+ dirname( __FILE__ ) . '/gentium/GenBkBasB.ttf',
43
+ );
44
 
45
  /* Directory temporary keeping CAPTCHA images and corresponding text files */
46
  $this->tmp_dir = path_join( dirname( __FILE__ ), 'tmp' );
143
  }
144
 
145
  imagedestroy( $im );
146
+ chmod( $file, $this->file_mode );
147
  }
148
 
149
  $this->generate_answer_file( $prefix, $word );
162
  $answer_file = $dir . sanitize_file_name( $prefix . '.txt' );
163
  $answer_file = $this->normalize_path( $answer_file );
164
 
165
+ if ( $fh = fopen( $answer_file, 'w' ) ) {
166
  $word = strtoupper( $word );
167
  $salt = wp_generate_password( 64 );
168
  $hash = hash_hmac( 'md5', $word, $salt );
 
169
  $code = $salt . '|' . $hash;
 
170
  fwrite( $fh, $code );
171
  fclose( $fh );
172
  }
173
 
174
+ chmod( $answer_file, $this->answer_file_mode );
175
  }
176
 
177
  /**
193
  $filename = sanitize_file_name( $prefix . '.txt' );
194
  $file = $this->normalize_path( $dir . $filename );
195
 
196
+ if ( is_readable( $file ) && ( $code = file_get_contents( $file ) ) ) {
197
  $code = explode( '|', $code, 2 );
 
198
  $salt = $code[0];
199
  $hash = $code[1];
200
 
219
  $filename = sanitize_file_name( $prefix . $suffix );
220
  $file = $this->normalize_path( $dir . $filename );
221
 
222
+ if ( is_file( $file ) ) {
223
+ unlink( $file );
224
  }
225
  }
226
  }
235
  $dir = trailingslashit( $this->tmp_dir );
236
  $dir = $this->normalize_path( $dir );
237
 
238
+ if ( ! is_dir( $dir ) || ! is_readable( $dir ) ) {
239
  return false;
240
  }
241
 
242
  $is_win = ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) );
243
 
244
+ if ( ! ( $is_win ? win_is_writable( $dir ) : is_writable( $dir ) ) ) {
245
  return false;
246
  }
247
 
248
  $count = 0;
249
 
250
+ if ( $handle = opendir( $dir ) ) {
251
  while ( false !== ( $filename = readdir( $handle ) ) ) {
252
  if ( ! preg_match( '/^[0-9]+\.(php|txt|png|gif|jpeg)$/', $filename ) ) {
253
  continue;
254
  }
255
 
256
  $file = $this->normalize_path( $dir . $filename );
257
+ $stat = stat( $file );
258
 
 
259
  if ( ( $stat['mtime'] + $minutes * 60 ) < time() ) {
260
+ if ( ! unlink( $file ) ) {
261
+ chmod( $file, 0644 );
262
+ unlink( $file );
263
  }
264
 
265
  $count += 1;
295
  return true;
296
  }
297
 
298
+ if ( $handle = fopen( $htaccess_file, 'w' ) ) {
299
  fwrite( $handle, 'Order deny,allow' . "\n" );
300
  fwrite( $handle, 'Deny from all' . "\n" );
301
  fwrite( $handle, '<Files ~ "^[0-9A-Za-z]+\\.(jpeg|gif|png)$">' . "\n" );
tmp/index.php CHANGED
@@ -1,3 +1,2 @@
1
  <?php
2
  // Silence is golden.
3
- ?>
1
  <?php
2
  // Silence is golden.