From c10f97740a6f10560e8684ce5254562eba01fe73 Mon Sep 17 00:00:00 2001
From: Bram Matthys <syzop@vulnscan.org>
Date: Sat, 05 Sep 2015 15:31:25 -0400
Subject: [PATCH] Add $config['password_crypt_rounds']: this specifies the number of rounds to be used for the sha256 and sha512 crypt hashing algorithms.
---
plugins/password/config.inc.php.dist | 6 ++++++
plugins/password/password.php | 14 ++++++++++++--
2 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/plugins/password/config.inc.php.dist b/plugins/password/config.inc.php.dist
index 8624c56..b1478db 100644
--- a/plugins/password/config.inc.php.dist
+++ b/plugins/password/config.inc.php.dist
@@ -61,6 +61,12 @@
// Be aware, the higher the value, the longer it takes to generate the password hashes.
$config['password_blowfish_cost'] = 12;
+// Number of rounds for the sha256 and sha512 crypt hashing algorithms.
+// Must be at least 1000. If not set, then the number of rounds is left up
+// to the crypt() implementation. On glibc this defaults to 5000.
+// Be aware, the higher the value, the longer it takes to generate the password hashes.
+//$config['password_crypt_rounds'] = 50000;
+
// This option temporarily disables the password change functionality.
// Use it when the users database server is in maintenance mode or sth like that.
// You can set it to TRUE/FALSE or a text describing the reason
diff --git a/plugins/password/password.php b/plugins/password/password.php
index 4dc5909..c184fe4 100644
--- a/plugins/password/password.php
+++ b/plugins/password/password.php
@@ -439,12 +439,22 @@
break;
case 'sha256-crypt':
- $crypted = crypt($password, '$5$' . self::random_salt(16));
+ $rounds = (int) $rcmail->config->get('password_crypt_rounds');
+ if ($rounds < 1000)
+ $prefix = '$5$';
+ else
+ $prefix = '$5$rounds=' . $rounds . '$';
+ $crypted = crypt($password, $prefix . self::random_salt(16));
$prefix = '{CRYPT}';
break;
case 'sha512-crypt':
- $crypted = crypt($password, '$6$' . self::random_salt(16));
+ $rounds = (int) $rcmail->config->get('password_crypt_rounds');
+ if ($rounds < 1000)
+ $prefix = '$6$';
+ else
+ $prefix = '$6$rounds=' . $rounds . '$';
+ $crypted = crypt($password, $prefix . self::random_salt(16));
$prefix = '{CRYPT}';
break;
--
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