random_bytes()-related improvements
See #4260
diff --git a/system/libraries/Encryption.php b/system/libraries/Encryption.php
index 92c38a0..a10a5c2 100644
--- a/system/libraries/Encryption.php
+++ b/system/libraries/Encryption.php
@@ -339,12 +339,26 @@
{
if (function_exists('random_bytes'))
{
- return random_bytes((int) $length);
+ try
+ {
+ return random_bytes((int) $length);
+ }
+ catch (Exception $e)
+ {
+ log_message('error', $e->getMessage());
+ return FALSE;
+ }
+ }
+ elseif (defined('MCRYPT_DEV_URANDOM'))
+ {
+ return mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);
}
- return ($this->_driver === 'mcrypt')
- ? mcrypt_create_iv($length, MCRYPT_DEV_URANDOM)
- : openssl_random_pseudo_bytes($length);
+ $is_secure = NULL;
+ $key = openssl_random_pseudo_bytes($length, $is_secure);
+ return ($is_secure === TRUE)
+ ? $key
+ : FALSE;
}
// --------------------------------------------------------------------
@@ -400,7 +414,7 @@
// The greater-than-1 comparison is mostly a work-around for a bug,
// where 1 is returned for ARCFour instead of 0.
$iv = (($iv_size = mcrypt_enc_get_iv_size($params['handle'])) > 1)
- ? mcrypt_create_iv($iv_size, MCRYPT_DEV_URANDOM)
+ ? $this->create_key($iv_size)
: NULL;
if (mcrypt_generic_init($params['handle'], $params['key'], $iv) < 0)
@@ -463,7 +477,7 @@
}
$iv = ($iv_size = openssl_cipher_iv_length($params['handle']))
- ? openssl_random_pseudo_bytes($iv_size)
+ ? $this->create_key($iv_size)
: NULL;
$data = openssl_encrypt(