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Fallback for systems without openssl

This commit is contained in:
Lukas Reschke 2012-09-29 16:44:02 +02:00
parent 992c2c9d4b
commit ef57e9294b
3 changed files with 30 additions and 7 deletions
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2
core/lostpassword/index.php
View File

@ -13,7 +13,7 @@ require_once '../../lib/base.php';
// Someone lost their password:
if (isset($_POST['user'])) {
if (OC_User::userExists($_POST['user'])) {
$token = hash("sha256", $_POST['user'].openssl_random_pseudo_bytes(10, $cstrong));
$token = hash("sha256", $_POST['user'].OC_Util::generate_random_bytes(10));
OC_Preferences::setValue($_POST['user'], 'owncloud', 'lostpassword', $token);
$email = OC_Preferences::getValue($_POST['user'], 'settings', 'email', '');
if (!empty($email)) {

3
lib/setup.php
View File

@ -79,8 +79,7 @@ class OC_Setup {
}
//generate a random salt that is used to salt the local user passwords
$random_bytes = openssl_random_pseudo_bytes(30, $cstrong);
$salt = bin2hex($random_bytes);
$salt = OC_Util::generate_random_bytes(30);
OC_Config::setValue('passwordsalt', $salt);
//write the config file

30
lib/util.php
View File

@ -437,9 +437,7 @@ class OC_Util {
*/
public static function callRegister() {
// generate a random token.
$bytes = openssl_random_pseudo_bytes(10, $cstrong);
$hex = bin2hex($bytes);
$token = $hex;
$token = self::generate_random_bytes(20);
// store the token together with a timestamp in the session.
$_SESSION['requesttoken-'.$token]=time();
@ -550,4 +548,30 @@ class OC_Util {
}
}
/*
* @brief Generates random bytes with "openssl_random_pseudo_bytes" with a fallback for systems without openssl
* Inspired by gorgo on php.net
* @param Int with the length of the random
* @return String with the random bytes
*/
public static function generate_random_bytes($length = 30) {
if(function_exists('openssl_random_pseudo_bytes')) {
$pseudo_byte = bin2hex(openssl_random_pseudo_bytes($length, $strong));
if($strong == TRUE) {
return substr($pseudo_byte, 0, $length); // Truncate it to match the length
}
}
// fallback to mt_rand()
$characters = '0123456789';
$characters .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
$charactersLength = strlen($characters)-1;
$pseudo_byte = "";
// Select some random characters
for ($i = 0; $i < $length; $i++) {
$pseudo_byte .= $characters[mt_rand(0, $charactersLength)];
}
return $pseudo_byte;
}
}