/usr/ is in libqca-qt5-2-dev 2.1.3-2ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/Qca-qt5/
/usr/include/Qca-qt5/QtCrypto/
/usr/include/Qca-qt5/QtCrypto/QtCrypto
/usr/include/Qca-qt5/QtCrypto/qca.h
/usr/include/Qca-qt5/QtCrypto/qca_basic.h
/usr/include/Qca-qt5/QtCrypto/qca_cert.h
/usr/include/Qca-qt5/QtCrypto/qca_core.h
/usr/include/Qca-qt5/QtCrypto/qca_export.h
/usr/include/Qca-qt5/QtCrypto/qca_keystore.h
/usr/include/Qca-qt5/QtCrypto/qca_publickey.h
/usr/include/Qca-qt5/QtCrypto/qca_safetimer.h
/usr/include/Qca-qt5/QtCrypto/qca_securelayer.h
/usr/include/Qca-qt5/QtCrypto/qca_securemessage.h
/usr/include/Qca-qt5/QtCrypto/qca_support.h
/usr/include/Qca-qt5/QtCrypto/qca_textfilter.h
/usr/include/Qca-qt5/QtCrypto/qca_tools.h
/usr/include/Qca-qt5/QtCrypto/qca_version.h
/usr/include/Qca-qt5/QtCrypto/qcaprovider.h
/usr/include/Qca-qt5/QtCrypto/qpipe.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/Qca-qt5/
/usr/lib/x86_64-linux-gnu/cmake/Qca-qt5/Qca-qt5Config.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qca-qt5/Qca-qt5ConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qca-qt5/Qca-qt5Targets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qca-qt5/Qca-qt5Targets.cmake
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/qca2-qt5.pc
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/crypto.prf
/usr/share/
/usr/share/doc/
/usr/share/doc/libqca-qt5-2-dev/
/usr/share/doc/libqca-qt5-2-dev/copyright
/usr/lib/x86_64-linux-gnu/libqca-qt5.so
/usr/share/doc/libqca-qt5-2-dev/changelog.Debian.gz