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[fa-stable.git] / includes / main.inc

diff --git a/includes/main.inc b/includes/main.inc
index 11746a288b386bc254d0ea2b6ab4fdd6b436480e..7b37055abc60e317c9f64a413eed964d34607ec9 100644 (file)
--- a/includes/main.inc
+++ b/includes/main.inc
@@ -68,6 +68,24 @@ function end_page($no_menu=false, $is_index=false, $final_screen=false, $type_no
        page_footer($no_menu, $is_index);
 }
 
+function css_files_ensure_init() {
+       global $css_files, $path_to_root;
+
+       if (!isset($css_files))
+       {
+               $theme = user_theme();
+               $css_files = array();
+               $css_files[] = $path_to_root . "/themes/$theme/default.css";
+       }
+}
+
+function add_css_file($filename)
+{
+       global $css_files;
+       css_files_ensure_init();
+       $css_files[] = $filename;
+}
+
 function cache_js_file($fpath, $text) 
 {
        global $SysPrefs;
@@ -383,3 +401,45 @@ function clean_file_name($filename) {
     return preg_replace('/[^a-zA-Z0-9.\-_]/', '_', $filename);
 }
 
+/*
+       Simple random password generator.
+*/
+function generate_password()
+{
+       if (PHP_VERSION >= '5.3')
+               $bytes = openssl_random_pseudo_bytes(8, $cstrong);
+       else
+               $bytes = sprintf("08%x", mt_rand(0,0xffffffff));
+
+       return  base64_encode($bytes);
+}
+
+if (!function_exists('array_fill_keys')) // since 5.2
+{
+       function array_fill_keys($keys, $value)
+       {
+               return (object)array_combine($keys, array_fill(count($keys), $value));
+       }
+}
+
+/*
+       This function aims to generate cryptographically strong random identifier.
+       Result identifier has length 4[strength/8/3] 
+*/
+function random_id($strength = 128)
+{
+       $n = ceil($strength/8);
+
+       if (function_exists('openssl_random_pseudo_bytes'))
+               $bin = openssl_random_pseudo_bytes($n, $cstrong);       // openssl on php 5.3 and up
+       else if (file_exists('/dev/urandom'))
+               $bin = file_get_contents('/dev/urandom', false, null, -1, $n);  // linux std random device
+       else {
+               $bin = '';
+               for($i=0; $i < $n; $i++)
+                       $bin .= chr(mt_rand(0, 255));   // Mersene Twister generator
+       }
+       $id = strtr(base64_encode($bin), '+/=', '-_x'); // see RFC 4648 Section 5
+
+       return $id;
+}