wp-pass.php replacement for wp > 3.4

gistfile1.php

<?php

add_action( 'plugins_loaded', 'bypass_wp_login_for_pw_protected_posts' );
function bypass_wp_login_for_pw_protected_posts() {
	// this functionality is a fork of http://core.trac.wordpress.org/browser/trunk/wp-login.php#L385
	// keep this in sync with Core
	$action = isset( $_REQUEST['action'] ) ? $_REQUEST['action'] : 'login';
	if ( 'postpass' <> $action )
		return;

	if ( empty( $wp_hasher ) ) {
		require_once( ABSPATH . 'wp-includes/class-phpass.php' );
		// By default, use the portable hash from phpass
		$wp_hasher = new PasswordHash(8, true);
	}
	
	// 10 days
	setcookie( 'wp-postpass_' . COOKIEHASH, $wp_hasher->HashPassword( stripslashes( $_POST['post_password'] ) ), time() + 864000, COOKIEPATH );	
	
	wp_safe_redirect( wp_get_referer() );
	
	exit();
	
}