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-rw-r--r--system/libraries/Session/drivers/Session_cookie.php69
1 files changed, 37 insertions, 32 deletions
diff --git a/system/libraries/Session/drivers/Session_cookie.php b/system/libraries/Session/drivers/Session_cookie.php
index c8dfad6c9..79712ad94 100644
--- a/system/libraries/Session/drivers/Session_cookie.php
+++ b/system/libraries/Session/drivers/Session_cookie.php
@@ -240,7 +240,7 @@ class CI_Session_cookie extends CI_Session_driver {
// Do we need encryption? If so, load the encryption class
if ($this->sess_encrypt_cookie === TRUE)
{
- $this->CI->load->library('encrypt');
+ $this->CI->load->library('encryption');
}
// Check for database
@@ -383,38 +383,41 @@ class CI_Session_cookie extends CI_Session_driver {
return FALSE;
}
- $len = strlen($session) - 40;
-
- if ($len < 0)
+ if ($this->sess_encrypt_cookie === TRUE)
{
- log_message('debug', 'The session cookie was not signed.');
- return FALSE;
+ $session = $this->CI->encryption->decrypt($session);
+ if ($session === FALSE)
+ {
+ log_message('error', 'Session: Unable to decrypt the session cookie, possibly due to a HMAC mismatch.');
+ return FALSE;
+ }
}
-
- // Check cookie authentication
- $hmac = substr($session, $len);
- $session = substr($session, 0, $len);
-
- // Time-attack-safe comparison
- $hmac_check = hash_hmac('sha1', $session, $this->encryption_key);
- $diff = 0;
- for ($i = 0; $i < 40; $i++)
+ else
{
- $diff |= ord($hmac[$i]) ^ ord($hmac_check[$i]);
- }
+ if (($len = strlen($session) - 40) <= 0)
+ {
+ log_message('error', 'Session: The session cookie was not signed.');
+ return FALSE;
+ }
- if ($diff !== 0)
- {
- log_message('error', 'The session cookie data did not match what was expected.');
- $this->sess_destroy();
- return FALSE;
- }
+ // Check cookie authentication
+ $hmac = substr($session, $len);
+ $session = substr($session, 0, $len);
- // Check for encryption
- if ($this->sess_encrypt_cookie === TRUE)
- {
- // Decrypt the cookie data
- $session = $this->CI->encrypt->decode($session);
+ // Time-attack-safe comparison
+ $hmac_check = hash_hmac('sha1', $session, $this->encryption_key);
+ $diff = 0;
+ for ($i = 0; $i < 40; $i++)
+ {
+ $diff |= ord($hmac[$i]) ^ ord($hmac_check[$i]);
+ }
+
+ if ($diff !== 0)
+ {
+ log_message('error', 'Session: HMAC mismatch. The session cookie data did not match what was expected.');
+ $this->sess_destroy();
+ return FALSE;
+ }
}
// Unserialize the session array
@@ -731,11 +734,13 @@ class CI_Session_cookie extends CI_Session_driver {
if ($this->sess_encrypt_cookie === TRUE)
{
- $cookie_data = $this->CI->encrypt->encode($cookie_data);
+ $cookie_data = $this->CI->encryption->encrypt($cookie_data);
+ }
+ else
+ {
+ // Require message authentication
+ $cookie_data .= hash_hmac('sha1', $cookie_data, $this->encryption_key);
}
-
- // Require message authentication
- $cookie_data .= hash_hmac('sha1', $cookie_data, $this->encryption_key);
$expire = ($this->sess_expire_on_close === TRUE) ? 0 : $this->sess_expiration + time();