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SymmetricKey: don't define self::$gcmField unless we're in GCM mode

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This commit is contained in:
terrafrost 2018-12-30 10:14:51 -06:00
parent f98e0afc76
commit c6f9807633
1 changed files with 3 additions and 14 deletions
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17
phpseclib/Crypt/Common/SymmetricKey.php
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@ -584,10 +584,6 @@ abstract class SymmetricKey
*/
public function __construct($mode)
{
if (!isset(self::$gcmField)) {
self::initialize_static_variables();
}
$mode = strtolower($mode);
// necessary because of 5.6 compatibility; we can't do isset(self::MODE_MAP[$mode]) in 5.6
$map = self::MODE_MAP;
@ -614,6 +610,9 @@ abstract class SymmetricKey
if ($this->block_size != 16) {
throw new \InvalidArgumentException('GCM is only valid for block ciphers with a block size of 128 bits');
}
if (!isset(self::$gcmField)) {
self::$gcmField = new BinaryField(128, 7, 2, 1, 0);
}
$this->paddable = false;
break;
default:
@ -623,16 +622,6 @@ abstract class SymmetricKey
$this->mode = $mode;
}
/**
* Initialize static variables
*
* @access private
*/
private static function initialize_static_variables()
{
self::$gcmField = new BinaryField(128, 7, 2, 1, 0);
}
/**
* Sets the initialization vector.
*