- }
- } else {
- for ($i=0; $i < count($pref); $i++) {
- fwrite($file, "$pref[$i]", 1024);
- }
- fwrite($file, "$string=$set_to\n", 1024);
- }
-
- fclose($file);
- }
-
-
-
-
- /** This checks if there is a pref file, if there isn't, it will create it. **/
- function checkForPrefs($data_dir, $username) {
- $filename = "$data_dir$username.pref";
- if (!file_exists($filename)) {
- if (!copy("$data_dir" . "default_pref", $filename)) {
- echo _("Error opening ") ."$filename";
- exit;
- }
- }
- return;
- }
-
-
-
- /** Writes the Signature **/
- function setSig($data_dir, $username, $string) {
- $filename = "$data_dir$username.sig";
- $file = fopen($filename, "w");
- fwrite($file, $string);
- fclose($file);
- }
-
-
-
- /** Gets the signature **/
- function getSig($data_dir, $username) {
- $filename = "$data_dir$username.sig";
- if (file_exists($filename)) {
- $file = fopen($filename, "r");
- while (!feof($file)) {
- $sig .= fgets($file, 1024);
- }
- fclose($file);
- } else {
- echo _("Signature file not found.");
- exit;
- }
- return $sig;
- }
-?>
+ }
+ }
+
+ /* Return the full hashed datafile path. */
+ return ($result);
+}
+
+/**
+ * Helper function for getHashedFile, given a username returns the hashed
+ * dir for that username.
+ *
+ * @param string username the username of the current user
+ * @param string dir the SquirrelMail datadir
+ * @param string hash_dirs default ''
+ * @return the path to the hash dir for username
+ * @since 1.2.0
+ */
+function getHashedDir($username, $dir, $hash_dirs = '') {
+ global $dir_hash_level;
+
+ /* Remove trailing slash from $dir if found */
+ if (substr($dir, -1) == '/') {
+ $dir = substr($dir, 0, strlen($dir) - 1);
+ }
+
+ /* If necessary, populate the hash dir variable. */
+ if ($hash_dirs == '') {
+ $hash_dirs = computeHashDirs($username);
+ }
+
+ /* Make sure the full hash directory exists. */
+ $real_hash_dir = $dir;
+ for ($h = 0; $h < $dir_hash_level; ++$h) {
+ $real_hash_dir .= '/' . $hash_dirs[$h];
+ if (!@is_dir($real_hash_dir)) {
+//FIXME: When safe_mode is turned on, the error suppression below makes debugging safe_mode UID/GID restrictions tricky... for now, I will add a check in configtest
+ if (!@mkdir($real_hash_dir, 0770)) {
+ error_box ( sprintf(_("Error creating directory %s."), $real_hash_dir) . "\n" .
+ _("Could not create hashed directory structure!") . "\n" .
+ _("Please contact your system administrator and report this error.") );
+ exit;
+ }
+ }
+ }
+
+ /* And return that directory. */
+ return ($real_hash_dir);
+}
+
+/**
+ * Helper function for getHashDir which does the actual hash calculation.
+ *
+ * Uses a crc32 algorithm by default, but if you put
+ * the following in config/config_local.php, you can
+ * force md5 instead:
+ * $hash_dirs_use_md5 = TRUE;
+ *
+ * You may also specify that if usernames are in full
+ * email address format, the domain part (beginning
+ * with "@") be stripped before calculating the crc
+ * or md5. Do that by putting the following in
+ * config/config_local.php:
+ * $hash_dirs_strip_domain = TRUE;
+ *
+ * @param string username the username to calculate the hash dir for
+ *
+ * @return array a list of hash dirs for this username
+ *
+ * @since 1.2.0
+ *
+ */
+function computeHashDirs($username) {
+
+ global $hash_dirs_use_md5, $hash_dirs_strip_domain;
+ static $hash_dirs = array();
+
+
+ // strip domain from username
+ if ($hash_dirs_strip_domain)
+ $user = substr($username, 0, strpos($username, '@'));
+ else
+ $user = $username;
+
+
+ // have we already calculated it?
+ if (!empty($hash_dirs[$user]))
+ return $hash_dirs[$user];
+
+
+ if ($hash_dirs_use_md5) {
+
+ $hash = md5($user);
+ //$hash = md5bin($user);
+
+ } else {
+
+ /* Compute the hash for this user and extract the hash directories. */
+ /* Note that the crc32() function result will be different on 32 and */
+ /* 64 bit systems, thus the hack below. */
+ $crc = crc32($user);
+ if ($crc & 0x80000000) {
+ $crc ^= 0xffffffff;
+ $crc += 1;
+ }
+ $hash = base_convert($crc, 10, 16);
+ }
+
+
+ $my_hash_dirs = array();
+ for ($h = 0; $h < 4; ++ $h) {
+ $my_hash_dirs[] = substr($hash, $h, 1);
+ }
+
+ // Return our array of hash directories
+ $hash_dirs[$user] = $my_hash_dirs;
+ return ($my_hash_dirs);
+}
+