579 lines
14 KiB
PHP
579 lines
14 KiB
PHP
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<?php
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trait WPCF7_ConfigValidator_Mail {
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/**
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* Replaces all mail-tags in the given content.
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*/
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public function replace_mail_tags( $content, $args = '' ) {
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$args = wp_parse_args( $args, array(
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'html' => false,
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'callback' =>
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array( $this, 'replace_mail_tags_with_minimum_input_callback' ),
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) );
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$content = new WPCF7_MailTaggedText( $content, $args );
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return $content->replace_tags();
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}
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/**
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* Callback function for WPCF7_MailTaggedText. Replaces mail-tags with
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* the most conservative inputs.
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*/
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public function replace_mail_tags_with_minimum_input_callback( $matches ) {
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// allow [[foo]] syntax for escaping a tag
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if ( $matches[1] === '[' and $matches[4] === ']' ) {
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return substr( $matches[0], 1, -1 );
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}
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$tag = $matches[0];
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$tagname = $matches[2];
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$values = $matches[3];
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$mail_tag = new WPCF7_MailTag( $tag, $tagname, $values );
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$field_name = $mail_tag->field_name();
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$example_email = 'example@example.com';
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$example_text = 'example';
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$example_blank = '';
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// for back-compat
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$field_name = preg_replace( '/^wpcf7\./', '_', $field_name );
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if ( '_site_admin_email' === $field_name ) {
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return get_bloginfo( 'admin_email', 'raw' );
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} elseif ( '_user_agent' === $field_name ) {
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return $example_text;
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} elseif ( '_user_email' === $field_name ) {
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return $this->contact_form->is_true( 'subscribers_only' )
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? $example_email
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: $example_blank;
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} elseif ( str_starts_with( $field_name, '_user_' ) ) {
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return $this->contact_form->is_true( 'subscribers_only' )
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? $example_text
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: $example_blank;
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} elseif ( str_starts_with( $field_name, '_' ) ) {
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return str_ends_with( $field_name, '_email' )
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? $example_email
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: $example_text;
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}
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static $opcalcset = array();
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if ( ! isset( $opcalcset[$this->contact_form->id()] ) ) {
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$opcalcset[$this->contact_form->id()] =
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new WPCF7_MailTag_OutputCalculator( $this->contact_form );
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}
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$opcalc = $opcalcset[$this->contact_form->id()];
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$op = $opcalc->calc_output( $mail_tag );
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if ( WPCF7_MailTag_OutputCalculator::email === $op ) {
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return $example_email;
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} elseif ( ! ( WPCF7_MailTag_OutputCalculator::blank & $op ) ) {
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return $example_text;
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} else {
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return $example_blank;
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}
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}
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/**
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* Runs error detection for the mail sections.
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*/
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public function validate_mail( $template = 'mail' ) {
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if (
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$this->contact_form->is_true( 'demo_mode' ) or
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$this->contact_form->is_true( 'skip_mail' )
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) {
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return;
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}
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$components = (array) $this->contact_form->prop( $template );
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if ( ! $components ) {
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return;
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}
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if ( 'mail' !== $template and empty( $components['active'] ) ) {
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return;
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}
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$components = wp_parse_args( $components, array(
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'subject' => '',
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'sender' => '',
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'recipient' => '',
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'additional_headers' => '',
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'body' => '',
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'attachments' => '',
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) );
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$this->validate_mail_subject(
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$template,
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$components['subject']
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);
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$this->validate_mail_sender(
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$template,
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$components['sender']
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);
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$this->validate_mail_recipient(
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$template,
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$components['recipient']
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);
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$this->validate_mail_additional_headers(
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$template,
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$components['additional_headers']
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);
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$this->validate_mail_body(
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$template,
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$components['body']
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);
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$this->validate_mail_attachments(
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$template,
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$components['attachments']
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);
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}
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/**
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* Runs error detection for the mail subject section.
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*/
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public function validate_mail_subject( $template, $content ) {
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$section = sprintf( '%s.subject', $template );
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if ( $this->supports( 'maybe_empty' ) ) {
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if ( $this->detect_maybe_empty( $section, $content ) ) {
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$this->add_error( $section, 'maybe_empty',
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array(
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'message' => __( "There is a possible empty field.", 'contact-form-7' ),
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)
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);
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} else {
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$this->remove_error( $section, 'maybe_empty' );
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}
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}
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}
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/**
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* Runs error detection for the mail sender section.
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*/
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public function validate_mail_sender( $template, $content ) {
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$section = sprintf( '%s.sender', $template );
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if ( $this->supports( 'invalid_mailbox_syntax' ) ) {
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if ( $this->detect_invalid_mailbox_syntax( $section, $content ) ) {
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$this->add_error( $section, 'invalid_mailbox_syntax',
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array(
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'message' => __( "Invalid mailbox syntax is used.", 'contact-form-7' ),
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)
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);
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} else {
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$this->remove_error( $section, 'invalid_mailbox_syntax' );
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}
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}
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if ( $this->supports( 'email_not_in_site_domain' ) ) {
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$this->remove_error( $section, 'email_not_in_site_domain' );
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if ( ! $this->has_error( $section, 'invalid_mailbox_syntax' ) ) {
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$sender = $this->replace_mail_tags( $content );
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$sender = wpcf7_strip_newline( $sender );
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if ( ! wpcf7_is_email_in_site_domain( $sender ) ) {
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$this->add_error( $section, 'email_not_in_site_domain',
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array(
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'message' => __( "Sender email address does not belong to the site domain.", 'contact-form-7' ),
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)
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);
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}
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}
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}
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}
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/**
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* Runs error detection for the mail recipient section.
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*/
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public function validate_mail_recipient( $template, $content ) {
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$section = sprintf( '%s.recipient', $template );
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if ( $this->supports( 'invalid_mailbox_syntax' ) ) {
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if ( $this->detect_invalid_mailbox_syntax( $section, $content ) ) {
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$this->add_error( $section, 'invalid_mailbox_syntax',
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array(
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'message' => __( "Invalid mailbox syntax is used.", 'contact-form-7' ),
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)
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);
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} else {
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$this->remove_error( $section, 'invalid_mailbox_syntax' );
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}
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}
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if ( $this->supports( 'unsafe_email_without_protection' ) ) {
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$this->remove_error( $section, 'unsafe_email_without_protection' );
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if ( ! $this->has_error( $section, 'invalid_mailbox_syntax' ) ) {
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if (
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$this->detect_unsafe_email_without_protection( $section, $content )
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) {
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$this->add_error( $section, 'unsafe_email_without_protection',
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array(
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'message' => __( "Unsafe email config is used without sufficient protection.", 'contact-form-7' ),
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)
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);
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}
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}
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}
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}
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/**
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* Runs error detection for the mail additional headers section.
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*/
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public function validate_mail_additional_headers( $template, $content ) {
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$section = sprintf( '%s.additional_headers', $template );
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$invalid_mail_headers = array();
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$invalid_mailbox_fields = array();
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$unsafe_email_fields = array();
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foreach ( explode( "\n", $content ) as $header ) {
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$header = trim( $header );
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if ( '' === $header ) {
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continue;
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}
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$is_valid_header = preg_match(
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'/^([0-9A-Za-z-]+):(.*)$/',
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$header,
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$matches
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);
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if ( ! $is_valid_header ) {
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$invalid_mail_headers[] = $header;
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continue;
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}
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$header_name = $matches[1];
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$header_value = trim( $matches[2] );
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if (
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in_array(
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strtolower( $header_name ), array( 'reply-to', 'cc', 'bcc' )
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) and
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'' !== $header_value and
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$this->detect_invalid_mailbox_syntax( $section, $header_value )
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) {
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$invalid_mailbox_fields[] = $header_name;
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continue;
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}
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if (
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in_array( strtolower( $header_name ), array( 'cc', 'bcc' ) ) and
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$this->detect_unsafe_email_without_protection( $section, $header_value )
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) {
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$unsafe_email_fields[] = $header_name;
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}
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}
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if ( $this->supports( 'invalid_mail_header' ) ) {
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if ( ! empty( $invalid_mail_headers ) ) {
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$this->add_error( $section, 'invalid_mail_header',
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array(
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'message' => __( "There are invalid mail header fields.", 'contact-form-7' ),
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)
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);
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} else {
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$this->remove_error( $section, 'invalid_mail_header' );
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}
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}
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if ( $this->supports( 'invalid_mailbox_syntax' ) ) {
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if ( ! empty( $invalid_mailbox_fields ) ) {
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foreach ( $invalid_mailbox_fields as $header_name ) {
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$this->add_error( $section, 'invalid_mailbox_syntax',
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array(
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'message' => __( "Invalid mailbox syntax is used in the %name% field.", 'contact-form-7' ),
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'params' => array( 'name' => $header_name ),
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)
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);
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}
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} else {
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$this->remove_error( $section, 'invalid_mailbox_syntax' );
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|
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}
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}
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|
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||
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if ( $this->supports( 'unsafe_email_without_protection' ) ) {
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if ( ! empty( $unsafe_email_fields ) ) {
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$this->add_error( $section, 'unsafe_email_without_protection',
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||
|
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array(
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||
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'message' => __( "Unsafe email config is used without sufficient protection.", 'contact-form-7' ),
|
||
|
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)
|
||
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);
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} else {
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$this->remove_error( $section, 'unsafe_email_without_protection' );
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||
|
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}
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||
|
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}
|
||
|
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}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
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* Runs error detection for the mail body section.
|
||
|
|
*/
|
||
|
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public function validate_mail_body( $template, $content ) {
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||
|
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$section = sprintf( '%s.body', $template );
|
||
|
|
|
||
|
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if ( $this->supports( 'maybe_empty' ) ) {
|
||
|
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if ( $this->detect_maybe_empty( $section, $content ) ) {
|
||
|
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$this->add_error( $section, 'maybe_empty',
|
||
|
|
array(
|
||
|
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'message' => __( "There is a possible empty field.", 'contact-form-7' ),
|
||
|
|
)
|
||
|
|
);
|
||
|
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} else {
|
||
|
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$this->remove_error( $section, 'maybe_empty' );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Runs error detection for the mail attachments section.
|
||
|
|
*/
|
||
|
|
public function validate_mail_attachments( $template, $content ) {
|
||
|
|
$section = sprintf( '%s.attachments', $template );
|
||
|
|
|
||
|
|
$total_size = 0;
|
||
|
|
$files_not_found = array();
|
||
|
|
$files_out_of_content = array();
|
||
|
|
|
||
|
|
if ( '' !== $content ) {
|
||
|
|
$attachables = array();
|
||
|
|
|
||
|
|
$tags = $this->contact_form->scan_form_tags(
|
||
|
|
array( 'type' => array( 'file', 'file*' ) )
|
||
|
|
);
|
||
|
|
|
||
|
|
foreach ( $tags as $tag ) {
|
||
|
|
$name = $tag->name;
|
||
|
|
|
||
|
|
if ( ! str_contains( $content, "[{$name}]" ) ) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
$limit = (int) $tag->get_limit_option();
|
||
|
|
|
||
|
|
if ( empty( $attachables[$name] ) or $attachables[$name] < $limit ) {
|
||
|
|
$attachables[$name] = $limit;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$total_size = array_sum( $attachables );
|
||
|
|
|
||
|
|
foreach ( explode( "\n", $content ) as $line ) {
|
||
|
|
$line = trim( $line );
|
||
|
|
|
||
|
|
if ( '' === $line or str_starts_with( $line, '[' ) ) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( $this->detect_file_not_found( $section, $line ) ) {
|
||
|
|
$files_not_found[] = $line;
|
||
|
|
} elseif ( $this->detect_file_not_in_content_dir( $section, $line ) ) {
|
||
|
|
$files_out_of_content[] = $line;
|
||
|
|
} else {
|
||
|
|
$total_size += (int) @filesize( $path );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( $this->supports( 'file_not_found' ) ) {
|
||
|
|
if ( ! empty( $files_not_found ) ) {
|
||
|
|
foreach ( $files_not_found as $line ) {
|
||
|
|
$this->add_error( $section, 'file_not_found',
|
||
|
|
array(
|
||
|
|
'message' => __( "Attachment file does not exist at %path%.", 'contact-form-7' ),
|
||
|
|
'params' => array( 'path' => $line ),
|
||
|
|
)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$this->remove_error( $section, 'file_not_found' );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( $this->supports( 'file_not_in_content_dir' ) ) {
|
||
|
|
if ( ! empty( $files_out_of_content ) ) {
|
||
|
|
$this->add_error( $section, 'file_not_in_content_dir',
|
||
|
|
array(
|
||
|
|
'message' => __( "It is not allowed to use files outside the wp-content directory.", 'contact-form-7' ),
|
||
|
|
)
|
||
|
|
);
|
||
|
|
} else {
|
||
|
|
$this->remove_error( $section, 'file_not_in_content_dir' );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( $this->supports( 'attachments_overweight' ) ) {
|
||
|
|
$max = 25 * MB_IN_BYTES; // 25 MB
|
||
|
|
|
||
|
|
if ( $max < $total_size ) {
|
||
|
|
$this->add_error( $section, 'attachments_overweight',
|
||
|
|
array(
|
||
|
|
'message' => __( "The total size of attachment files is too large.", 'contact-form-7' ),
|
||
|
|
)
|
||
|
|
);
|
||
|
|
} else {
|
||
|
|
$this->remove_error( $section, 'attachments_overweight' );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Detects errors of invalid mailbox syntax.
|
||
|
|
*
|
||
|
|
* @link https://contactform7.com/configuration-errors/invalid-mailbox-syntax/
|
||
|
|
*/
|
||
|
|
public function detect_invalid_mailbox_syntax( $section, $content ) {
|
||
|
|
$content = $this->replace_mail_tags( $content );
|
||
|
|
$content = wpcf7_strip_newline( $content );
|
||
|
|
|
||
|
|
if ( ! wpcf7_is_mailbox_list( $content ) ) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Detects errors of empty message fields.
|
||
|
|
*
|
||
|
|
* @link https://contactform7.com/configuration-errors/maybe-empty/
|
||
|
|
*/
|
||
|
|
public function detect_maybe_empty( $section, $content ) {
|
||
|
|
$content = $this->replace_mail_tags( $content );
|
||
|
|
$content = wpcf7_strip_newline( $content );
|
||
|
|
|
||
|
|
if ( '' === $content ) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Detects errors of nonexistent attachment files.
|
||
|
|
*
|
||
|
|
* @link https://contactform7.com/configuration-errors/file-not-found/
|
||
|
|
*/
|
||
|
|
public function detect_file_not_found( $section, $content ) {
|
||
|
|
$path = path_join( WP_CONTENT_DIR, $content );
|
||
|
|
|
||
|
|
if ( ! is_readable( $path ) or ! is_file( $path ) ) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Detects errors of attachment files out of the content directory.
|
||
|
|
*
|
||
|
|
* @link https://contactform7.com/configuration-errors/file-not-in-content-dir/
|
||
|
|
*/
|
||
|
|
public function detect_file_not_in_content_dir( $section, $content ) {
|
||
|
|
$path = path_join( WP_CONTENT_DIR, $content );
|
||
|
|
|
||
|
|
if ( ! wpcf7_is_file_path_in_content_dir( $path ) ) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Detects errors of that unsafe email config is used without
|
||
|
|
* sufficient protection.
|
||
|
|
*
|
||
|
|
* @link https://contactform7.com/configuration-errors/unsafe-email-without-protection/
|
||
|
|
*/
|
||
|
|
public function detect_unsafe_email_without_protection( $section, $content ) {
|
||
|
|
static $is_recaptcha_active = null;
|
||
|
|
|
||
|
|
if ( null === $is_recaptcha_active ) {
|
||
|
|
$is_recaptcha_active = call_user_func( function () {
|
||
|
|
$service = WPCF7_RECAPTCHA::get_instance();
|
||
|
|
return $service->is_active();
|
||
|
|
} );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( $is_recaptcha_active ) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
$example_email = 'user-specified@example.com';
|
||
|
|
|
||
|
|
// Replace mail-tags connected to an email type form-tag first.
|
||
|
|
$content = $this->replace_mail_tags( $content, array(
|
||
|
|
'callback' => function ( $matches ) use ( $example_email ) {
|
||
|
|
// allow [[foo]] syntax for escaping a tag
|
||
|
|
if ( $matches[1] === '[' and $matches[4] === ']' ) {
|
||
|
|
return substr( $matches[0], 1, -1 );
|
||
|
|
}
|
||
|
|
|
||
|
|
$tag = $matches[0];
|
||
|
|
$tagname = $matches[2];
|
||
|
|
$values = $matches[3];
|
||
|
|
|
||
|
|
$mail_tag = new WPCF7_MailTag( $tag, $tagname, $values );
|
||
|
|
$field_name = $mail_tag->field_name();
|
||
|
|
|
||
|
|
$form_tags = $this->contact_form->scan_form_tags(
|
||
|
|
array( 'name' => $field_name )
|
||
|
|
);
|
||
|
|
|
||
|
|
if ( $form_tags ) {
|
||
|
|
$form_tag = new WPCF7_FormTag( $form_tags[0] );
|
||
|
|
|
||
|
|
if ( 'email' === $form_tag->basetype ) {
|
||
|
|
return $example_email;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $tag;
|
||
|
|
},
|
||
|
|
) );
|
||
|
|
|
||
|
|
// Replace remaining mail-tags.
|
||
|
|
$content = $this->replace_mail_tags( $content );
|
||
|
|
|
||
|
|
$content = wpcf7_strip_newline( $content );
|
||
|
|
|
||
|
|
if ( str_contains( $content, $example_email ) ) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|