/usr/share/php/ParagonIE/ConstantTime/ is in php-constant-time 2.2.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/ParagonIE/ConstantTime/Base32.php
/usr/share/php/ParagonIE/ConstantTime/Base32Hex.php
/usr/share/php/ParagonIE/ConstantTime/Base64.php
/usr/share/php/ParagonIE/ConstantTime/Base64DotSlash.php
/usr/share/php/ParagonIE/ConstantTime/Base64DotSlashOrdered.php
/usr/share/php/ParagonIE/ConstantTime/Base64UrlSafe.php
/usr/share/php/ParagonIE/ConstantTime/Binary.php
/usr/share/php/ParagonIE/ConstantTime/EncoderInterface.php
/usr/share/php/ParagonIE/ConstantTime/Encoding.php
/usr/share/php/ParagonIE/ConstantTime/Hex.php
/usr/share/php/ParagonIE/ConstantTime/RFC4648.php
/usr/share/php/ParagonIE/ConstantTime/autoload.php