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Improve validation of `user_login` and `user_nicename` length. 

The `user_login` field only allows 60 characters, and `user_nicename` allows
50. However, there are no protections in the interface, and few in the code,
that prevent the creation of users with values in excess of these limits. Prior
to recent changes in `$wpdb`, users were generally created anyway, MySQL
having performed the necessary truncation. More recently, the `INSERT`s and
`UPDATE`s simply fail, with no real feedback on the nature of the failure.

This changeset addresses the issue in a number of ways:
* On the user-new.php and network/user-new.php panels, don't allow input in excess of the maximum field length.
* In `wp_insert_user()`, throw an error if the value provided for `'user_login'` or `'user_nicename'` exceeds the maximum field length.
* In `wp_insert_user()`, when using `'user_login'` to generate a default value for `'user_nicename'`, ensure that the nicename is properly truncated, even when suffixed for uniqueness (username-2, etc).

Props dipesh.kakadiya, utkarshpatel, tommarshall, boonebgorges.
Fixes #33793.
Built from https://develop.svn.wordpress.org/trunk@34218


git-svn-id: http://core.svn.wordpress.org/trunk@34182 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Boone Gorges 2015-09-15 22:14:26 +00:00
parent cfbd3c2cc0
commit a7e229637e
4 changed files with 18 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
wp-admin/network/user-new.php
View File

@ -89,7 +89,7 @@ if ( isset( $add_user_errors ) && is_wp_error( $add_user_errors ) ) { ?>
<table class="form-table">
<tr class="form-field form-required">
<th scope="row"><label for="username"><?php _e( 'Username' ) ?></label></th>
<td><input type="text" class="regular-text" name="user[username]" id="username" autocapitalize="none" autocorrect="off" /></td>
<td><input type="text" class="regular-text" name="user[username]" id="username" autocapitalize="none" autocorrect="off" maxlength="60" /></td>
</tr>
<tr class="form-field form-required">
<th scope="row"><label for="email"><?php _e( 'Email' ) ?></label></th>

2
wp-admin/user-new.php
View File

@ -375,7 +375,7 @@ $new_user_ignore_pass = $creating && isset( $_POST['noconfirmation'] ) ? wp_unsl
<table class="form-table">
<tr class="form-field form-required">
<th scope="row"><label for="user_login"><?php _e('Username'); ?> <span class="description"><?php _e('(required)'); ?></span></label></th>
<td><input name="user_login" type="text" id="user_login" value="<?php echo esc_attr( $new_user_login ); ?>" aria-required="true" autocapitalize="none" autocorrect="off" /></td>
<td><input name="user_login" type="text" id="user_login" value="<?php echo esc_attr( $new_user_login ); ?>" aria-required="true" autocapitalize="none" autocorrect="off" maxlength="60" /></td>
</tr>
<tr class="form-field form-required">
<th scope="row"><label for="email"><?php _e('Email'); ?> <span class="description"><?php _e('(required)'); ?></span></label></th>

19
wp-includes/user-functions.php
View File

@ -1245,19 +1245,28 @@ function wp_insert_user( $userdata ) {
//Remove any non-printable chars from the login string to see if we have ended up with an empty username
$user_login = trim( $pre_user_login );
// user_login must be between 0 and 60 characters.
if ( empty( $user_login ) ) {
return new WP_Error('empty_user_login', __('Cannot create a user with an empty login name.') );
} elseif ( mb_strlen( $user_login ) > 60 ) {
return new WP_Error( 'user_login_too_long', __( 'Username may not be longer than 60 characters.' ) );
}
if ( ! $update && username_exists( $user_login ) ) {
return new WP_Error( 'existing_user_login', __( 'Sorry, that username already exists!' ) );
}
// If a nicename is provided, remove unsafe user characters before
// using it. Otherwise build a nicename from the user_login.
/*
* If a nicename is provided, remove unsafe user characters before using it.
* Otherwise build a nicename from the user_login.
*/
if ( ! empty( $userdata['user_nicename'] ) ) {
$user_nicename = sanitize_user( $userdata['user_nicename'], true );
if ( mb_strlen( $user_nicename ) > 50 ) {
return new WP_Error( 'user_nicename_too_long', __( 'Nicename may not be longer than 50 characters.' ) );
}
} else {
$user_nicename = $user_login;
$user_nicename = mb_substr( $user_login, 0, 50 );
}
$user_nicename = sanitize_title( $user_nicename );
@ -1395,7 +1404,9 @@ function wp_insert_user( $userdata ) {
if ( $user_nicename_check ) {
$suffix = 2;
while ($user_nicename_check) {
$alt_user_nicename = $user_nicename . "-$suffix";
// user_nicename allows 50 chars. Subtract one for a hyphen, plus the length of the suffix.
$base_length = 49 - mb_strlen( $suffix );
$alt_user_nicename = mb_substr( $user_nicename, 0, $base_length ) . "-$suffix";
$user_nicename_check = $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->users WHERE user_nicename = %s AND user_login != %s LIMIT 1" , $alt_user_nicename, $user_login));
$suffix++;
}

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.4-alpha-34217';
$wp_version = '4.4-alpha-34218';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.