/usr/share/php/phpseclib/ is in php-phpseclib 2.0.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/phpseclib/Crypt/
/usr/share/php/phpseclib/Crypt/AES.php
/usr/share/php/phpseclib/Crypt/Base.php
/usr/share/php/phpseclib/Crypt/Blowfish.php
/usr/share/php/phpseclib/Crypt/DES.php
/usr/share/php/phpseclib/Crypt/Hash.php
/usr/share/php/phpseclib/Crypt/RC2.php
/usr/share/php/phpseclib/Crypt/RC4.php
/usr/share/php/phpseclib/Crypt/RSA.php
/usr/share/php/phpseclib/Crypt/Random.php
/usr/share/php/phpseclib/Crypt/Rijndael.php
/usr/share/php/phpseclib/Crypt/TripleDES.php
/usr/share/php/phpseclib/Crypt/Twofish.php
/usr/share/php/phpseclib/File/
/usr/share/php/phpseclib/File/ANSI.php
/usr/share/php/phpseclib/File/ASN1/
/usr/share/php/phpseclib/File/ASN1.php
/usr/share/php/phpseclib/File/ASN1/Element.php
/usr/share/php/phpseclib/File/X509.php
/usr/share/php/phpseclib/Math/
/usr/share/php/phpseclib/Math/BigInteger.php
/usr/share/php/phpseclib/Net/
/usr/share/php/phpseclib/Net/SCP.php
/usr/share/php/phpseclib/Net/SFTP/
/usr/share/php/phpseclib/Net/SFTP.php
/usr/share/php/phpseclib/Net/SFTP/Stream.php
/usr/share/php/phpseclib/Net/SSH1.php
/usr/share/php/phpseclib/Net/SSH2.php
/usr/share/php/phpseclib/System/
/usr/share/php/phpseclib/System/SSH/
/usr/share/php/phpseclib/System/SSH/Agent/
/usr/share/php/phpseclib/System/SSH/Agent.php
/usr/share/php/phpseclib/System/SSH/Agent/Identity.php
/usr/share/php/phpseclib/autoload.php
/usr/share/php/phpseclib/bootstrap.php