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Fixed bug from issues 1

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- Fixed encryption and decryption Traditional PKWARE Encryption - add casting to 32-bit integer.
- The restriction on the length of the password to 99 characters for the WinZIP AES Encryption method.
This commit is contained in:
wapplay-home-linux
2016-12-14 12:34:59 +03:00
parent f2ffdae0c2
commit 11a7c16f1b
4 changed files with 73 additions and 16 deletions
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23
src/PhpZip/Crypto/TraditionalPkwareEncryptionEngine.php
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@@ -105,9 +105,26 @@ class TraditionalPkwareEncryptionEngine
private function updateKeys($charAt)
{
$this->keys[0] = self::crc32($this->keys[0], $charAt);
$this->keys[1] = ($this->keys[1] + ($this->keys[0] & 0xff)) & 4294967295;
$this->keys[1] = ($this->keys[1] * 134775813 + 1) & 4294967295;
$this->keys[2] = self::crc32($this->keys[2], ($this->keys[1] >> 24) & 0xff);
$this->keys[1] = $this->keys[1] + ($this->keys[0] & 0xff);
$this->keys[1] = self::toInt($this->keys[1] * 134775813 + 1);
$this->keys[2] = self::toInt(self::crc32($this->keys[2], ($this->keys[1] >> 24) & 0xff));
}
/**
* Cast to int
*
* @param $i
* @return int
*/
private static function toInt($i)
{
$i = (int)($i & 0xffffffff);
if ($i > 2147483647) {
return -(-$i & 0xffffffff);
} elseif ($i < -2147483648) {
return $i & -2147483648;
}
return $i;
}
/**