diff options
Diffstat (limited to 'system/libraries')
| -rw-r--r-- | system/libraries/Encryption.php | 114 |
1 files changed, 56 insertions, 58 deletions
diff --git a/system/libraries/Encryption.php b/system/libraries/Encryption.php index fe177fce3..36975e585 100644 --- a/system/libraries/Encryption.php +++ b/system/libraries/Encryption.php @@ -324,31 +324,27 @@ class CI_Encryption { { return FALSE; } + elseif ( ! isset($params['key'])) + { + if ( ! isset($this->_key)) + { + return show_error('Encryption: You are required to set an encryption key in your configuration.'); + } + + $params['key'] = $this->hkdf($this->_key, 'sha512', NULL, strlen($this->_key), 'encryption'); + } if (($data = $this->{'_'.$this->_driver.'_encrypt'}($data, $params)) === FALSE) { return FALSE; } - if ($params['base64']) - { - $data = base64_encode($data); - } + $params['base64'] && $data = base64_encode($data); - if ($params['hmac'] !== FALSE) + if (isset($params['hmac_digest'])) { - if ( ! isset($params['hmac']['key'])) - { - $params['hmac']['key'] = $this->hkdf( - $params['key'], - $params['hmac']['digest'], - NULL, - NULL, - 'authentication' - ); - } - - return hash_hmac($params['hmac']['digest'], $data, $params['hmac']['key'], ! $params['base64']).$data; + isset($params['hmac_key']) OR $params['hmac_key'] = $this->hkdf($this->_key, 'sha512', NULL, NULL, 'authentication'); + return hash_hmac($params['hmac_digest'], $data, $params['hmac_key'], ! $params['base64']).$data; } return $data; @@ -473,29 +469,29 @@ class CI_Encryption { { return FALSE; } - - if ($params['hmac'] !== FALSE) + elseif ( ! isset($params['key'])) { - if ( ! isset($params['hmac']['key'])) + if ( ! isset($this->_key)) { - $params['hmac']['key'] = $this->hkdf( - $params['key'], - $params['hmac']['digest'], - NULL, - NULL, - 'authentication' - ); + return show_error('Encryption: You are required to set an encryption key in your configuration.'); } + $params['key'] = $this->hkdf($this->_key, 'sha512', NULL, strlen($this->_key), 'encryption'); + } + + if (isset($params['hmac_digest'])) + { + isset($params['hmac_key']) OR $params['hmac_key'] = $this->hkdf($this->_key, 'sha512', NULL, NULL, 'authentication'); + // This might look illogical, but it is done during encryption as well ... // The 'base64' value is effectively an inverted "raw data" parameter $digest_size = ($params['base64']) - ? $this->_digests[$params['hmac']['digest']] * 2 - : $this->_digests[$params['hmac']['digest']]; + ? $this->_digests[$params['hmac_digest']] * 2 + : $this->_digests[$params['hmac_digest']]; $hmac = substr($data, 0, $digest_size); $data = substr($data, $digest_size); - if ($hmac !== hash_hmac($params['hmac']['digest'], $data, $params['hmac']['key'], ! $params['base64'])) + if ($hmac !== hash_hmac($params['hmac_digest'], $data, $params['hmac_key'], ! $params['base64'])) { return FALSE; } @@ -628,9 +624,10 @@ class CI_Encryption { 'handle' => $this->_handle, 'cipher' => $this->_cipher, 'mode' => $this->_mode, - 'key' => $this->_key, + 'key' => NULL, 'base64' => TRUE, - 'hmac' => $this->_mode === 'gcm' ? FALSE : array('digest' => 'sha512', 'key' => NULL) + 'hmac_digest' => ($this->_mode !== 'gcm' ? 'sha512' : NULL), + 'hmac_key' => NULL ) : FALSE; } @@ -639,51 +636,52 @@ class CI_Encryption { return FALSE; } - if ($params['mode'] === 'gcm') - { - $params['hmac'] = FALSE; - } - elseif ( ! isset($params['hmac']) OR ( ! is_array($params['hmac']) && $params['hmac'] !== FALSE)) - { - $params['hmac'] = array( - 'digest' => 'sha512', - 'key' => NULL - ); - } - elseif (is_array($params['hmac'])) + if (isset($params['mode'])) { - if (isset($params['hmac']['digest']) && ! isset($this->_digests[$params['hmac']['digest']])) + $params['mode'] = strtolower($params['mode']); + if ( ! isset($this->_modes[$this->_driver][$params['mode']])) { return FALSE; } - - $params['hmac'] = array( - 'digest' => isset($params['hmac']['digest']) ? $params['hmac']['digest'] : 'sha512', - 'key' => isset($params['hmac']['key']) ? $params['hmac']['key'] : NULL - ); + else + { + $params['mode'] = $this->_modes[$this->_driver][$params['mode']]; + } } - if (isset($params['mode'])) + if ($params['mode'] === 'gcm' OR isset($params['hmac']) && $params['hmac'] === FALSE) { - $params['mode'] = strtolower($params['mode']); - if ( ! isset($this->_modes[$this->_driver][$params['mode']])) + $params['hmac_digest'] = $params['hmac_key'] = NULL; + } + else + { + if ( ! isset($params['hmac_key'])) { return FALSE; } + elseif (isset($params['hmac_digest'])) + { + $params['hmac_digest'] = strtolower($params['hmac_digest']); + if ( ! isset($this->_digests[$params['hmac_digest']])) + { + return FALSE; + } + } else { - $params['mode'] = $this->_modes[$this->_driver][$params['mode']]; + $params['hmac_digest'] = 'sha512'; } } $params = array( 'handle' => NULL, - 'cipher' => isset($params['cipher']) ? $params['cipher'] : $this->_cipher, - 'mode' => isset($params['mode']) ? $params['mode'] : $this->_mode, - 'key' => isset($params['key']) ? $params['key'] : $this->_key, + 'cipher' => $params['cipher'], + 'mode' => $params['mode'], + 'key' => $params['key'], 'iv' => isset($params['iv']) ? $params['iv'] : NULL, 'base64' => isset($params['base64']) ? $params['base64'] : TRUE, - 'hmac' => $params['hmac'] + 'hmac_digest' => $params['hmac_digest'], + 'hmac_key' => $params['hmac_key'] ); $this->_cipher_alias($params['cipher']); |